/* TheIQRA Ghost Theme - Main Stylesheet */

/* ============================================
   CSS CUSTOM PROPERTIES (THEMING)
   ============================================ */

:root {
    /* Light Mode Colors */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F9FAFB;
    --bg-tertiary: #F5F5F5;
    --text-primary: #1A1B26;
    --text-secondary: #6B7280;
    --border-color: #E5E7EB;
    --primary-color: #2563EB;
    --primary-light: #EFF6FF;
    --primary-dark: #1D4ED8;
    /* Aliases used by homepage sections */
    --primary: #2563EB;
    --bg-card: #FFFFFF;
    --text-muted: #6B7280;
    --code-bg: #F5F5F5;
    --code-text: #1A1B26;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --info-color: #3b82f6;

    /* Typography */
    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border Radius */
    --border-radius-sm: 0.25rem;
    --border-radius-md: 0.375rem;
    --border-radius-lg: 0.5rem;
    --border-radius-xl: 0.75rem;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Dark Mode */
:root.dark,
[data-theme="dark"] {
    --bg-primary: #1A1B26;
    --bg-secondary: #252633;
    --bg-tertiary: #24283B;
    --text-primary: #C0CAF5;
    --text-secondary: #7AA2F7;
    --border-color: #3B4056;
    --primary-color: #60A5FA;
    --primary-light: #1E3A5F;
    --primary-dark: #93C5FD;
    --primary: #60A5FA;
    --bg-card: #252633;
    --text-muted: #9CA3AF;
    --code-bg: #24283B;
    --code-text: #C0CAF5;
}

/* ============================================
   BASE STYLES
   ============================================ */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: var(--font-size-base);
}

body {
    font-family: var(--font-family);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    line-height: var(--line-height-base);
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family);
    font-weight: 600;
    line-height: 1.25;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: 2.25rem;
    font-weight: 700;
}

h2 {
    font-size: 1.875rem;
    font-weight: 700;
}

h3 {
    font-size: 1.5rem;
    font-weight: 600;
}

h4 {
    font-size: 1.25rem;
    font-weight: 600;
}

h5 {
    font-size: 1.125rem;
    font-weight: 600;
}

h6 {
    font-size: 1rem;
    font-weight: 600;
}

p {
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

strong {
    font-weight: 600;
}

em {
    font-style: italic;
}

/* ============================================
   LAYOUT
   ============================================ */

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.main-content {
    flex: 1;
}

/* ============================================
   HEADER & NAVIGATION
   ============================================ */

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
    background-color: rgba(255, 255, 255, 0.95);
    transition: all var(--transition-normal);
}

.dark .site-header {
    background-color: rgba(26, 27, 38, 0.95);
}

.main-nav {
    padding: 0 var(--spacing-lg);
}

.nav-wrapper {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
    gap: 2rem;
}

.site-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--primary-color);
    min-width: fit-content;
}

.logo-image {
    height: 40px;
    width: auto;
}

.logo-text {
    background: linear-gradient(135deg, var(--primary-color) 0%, #7AA2F7 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 0.5rem;
    flex: 1;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: block;
    padding: 0.5rem 1rem;
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: color var(--transition-fast);
    border-radius: var(--border-radius-md);
}

.nav-link:hover {
    color: var(--primary-color);
}

.nav-item.active .nav-link {
    color: var(--primary-color);
    background: var(--bg-secondary);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-search-btn,
.dark-mode-toggle {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-primary);
    padding: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius-md);
    transition: all var(--transition-normal);
}

.nav-search-btn:hover,
.dark-mode-toggle:hover {
    background: var(--bg-secondary);
    color: var(--primary-color);
}

.moon-icon {
    display: none;
}

.dark .sun-icon {
    display: none;
}

.dark .moon-icon {
    display: block;
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero-section {
    background: linear-gradient(135deg, var(--primary-light) 0%, transparent 100%);
    padding: var(--spacing-2xl) var(--spacing-lg);
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-color) 0%, #7AA2F7 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
}

/* Search Container */
.search-container {
    display: flex;
    gap: var(--spacing-md);
    background: white;
    border-radius: var(--border-radius-lg);
    padding: 0.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    margin-bottom: var(--spacing-xl);
}

.dark .search-container {
    background: var(--bg-secondary);
}

.search-input {
    flex: 1;
    border: none;
    background: transparent;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    color: var(--text-primary);
}

.search-input::placeholder {
    color: var(--text-secondary);
}

.search-input:focus {
    outline: none;
}

.search-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    font-weight: 600;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.search-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

/* ============================================
   STATS SECTION
   ============================================ */

.stats-section {
    padding: var(--spacing-2xl) var(--spacing-lg);
    background: var(--bg-secondary);
    margin-bottom: var(--spacing-2xl);
}

.stats-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-xl);
    max-width: 1200px;
    margin: 0 auto;
}

.stat-card {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ============================================
   FEATURED SECTION
   ============================================ */

.featured-section {
    padding: var(--spacing-2xl) var(--spacing-lg);
}

.section-title {
    font-size: 2rem;
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2xl);
    font-size: 1.1rem;
}

.featured-grid,
.tutorials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

/* ============================================
   CATEGORIES SECTION
   ============================================ */

.categories-section {
    padding: var(--spacing-2xl) var(--spacing-lg);
    background: var(--bg-secondary);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.category-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    text-decoration: none;
    color: inherit;
    transition: all var(--transition-normal);
}

.category-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px);
    box-shadow: 0 10px 25px -5px rgba(0, 102, 204, 0.15);
}

.category-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-light) 0%, transparent 100%);
    border-radius: var(--border-radius-lg);
    color: var(--primary-color);
}

.category-name {
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
}

.category-count {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ============================================
   POST CARDS
   ============================================ */

.post-card {
    display: flex;
    flex-direction: column;
    height: 100%;
    background: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.post-card:hover {
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px -10px rgba(0, 102, 204, 0.2);
    transform: translateY(-4px);
}

.post-card-link {
    display: flex;
    flex-direction: column;
    height: 100%;
    text-decoration: none;
    color: inherit;
}

.post-card-image {
    position: relative;
    width: 100%;
    height: 200px;
    margin: 0;
    overflow: hidden;
    background: var(--bg-tertiary);
}

.post-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.post-card:hover .post-card-image img {
    transform: scale(1.05);
}

.post-card-tag {
    position: absolute;
    top: 1rem;
    right: 1rem;
    padding: 0.25rem 0.75rem;
    background: var(--primary-color);
    color: white;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    z-index: 10;
}

.post-card-tag.beginner {
    background: #10b981;
}

.post-card-tag.intermediate {
    background: #0066cc;
}

.post-card-tag.advanced {
    background: #ef4444;
}

.post-card-content {
    flex: 1;
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
}

.post-card-title {
    margin: 0 0 0.5rem 0;
    font-size: 1.125rem;
    font-weight: 600;
    line-height: 1.4;
    color: var(--text-primary);
}

.post-card:hover .post-card-title {
    color: var(--primary-color);
}

.post-card-excerpt {
    margin: 0.5rem 0 1rem 0;
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
    flex: 1;
}

.post-card-meta {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.post-card-author {
    font-weight: 500;
    color: var(--text-primary);
}

.post-card-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.post-card-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.tag-badge-small {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border-radius: 0.25rem;
    font-size: 0.7rem;
    font-weight: 500;
}

.read-more {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.875rem;
    white-space: nowrap;
}

/* ============================================
   TUTORIAL PAGE - 3 COLUMN LAYOUT
   ============================================ */

/* Top Bar */
.tutorial-topbar {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 70px;
    z-index: 50;
}

.topbar-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0.5rem 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.breadcrumbs {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.breadcrumb-link {
    color: var(--primary-color);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.breadcrumb-link:hover { text-decoration: underline; }

.breadcrumb-sep {
    color: var(--text-secondary);
    margin: 0 0.15rem;
    font-size: 1rem;
}

.breadcrumb-current {
    color: var(--text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
}

.topbar-nav {
    display: flex;
    gap: 0.5rem;
    flex-shrink: 0;
}

.topbar-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.35rem 0.75rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--primary-color);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.topbar-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    text-decoration: none;
}

/* 3-Column Layout */
.tutorial-layout {
    display: grid;
    grid-template-columns: 260px 1fr 220px;
    max-width: 1400px;
    margin: 0 auto;
    min-height: calc(100vh - 200px);
}

/* Left Sidebar */
.tutorial-sidebar-left {
    border-right: 1px solid var(--border-color);
    background: var(--bg-secondary);
    overflow: hidden;
}

.sidebar-left-inner {
    position: sticky;
    top: 120px;
    max-height: calc(100vh - 140px);
    overflow-y: auto;
    padding: 1rem 0;
    scrollbar-width: thin;
}

.sidebar-left-inner::-webkit-scrollbar {
    width: 4px;
}

.sidebar-left-inner::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.chapter-nav-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--primary-color);
    padding: 0 1rem 0.75rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 0.5rem;
}

.chapter-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.chapter-item {
    margin: 0;
}

.chapter-link {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    font-size: 0.82rem;
    line-height: 1.4;
    color: var(--text-primary);
    text-decoration: none;
    border-left: 3px solid transparent;
    transition: all var(--transition-fast);
}

.chapter-link:hover {
    background: var(--primary-light);
    color: var(--primary-color);
    text-decoration: none;
    border-left-color: var(--primary-color);
}

.chapter-link.is-active {
    background: var(--primary-light);
    color: var(--primary-color);
    font-weight: 600;
    border-left-color: var(--primary-color);
}

.chapter-number {
    color: var(--text-secondary);
    font-size: 0.75rem;
    flex-shrink: 0;
    min-width: 1.5rem;
    font-weight: 500;
}

.chapter-text {
    flex: 1;
}

/* Main Content Area */
.tutorial-content {
    padding: 2rem 2.5rem;
    min-width: 0;
    max-width: 100%;
}

.page-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Tutorial Header */
.tut-header {
    margin-bottom: 2rem;
    padding-bottom: 1.25rem;
    border-bottom: 1px solid var(--border-color);
}

.tut-title {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1.25;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.tut-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.tut-meta-items {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.tut-meta-item {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.82rem;
    color: var(--text-secondary);
}

.tut-author-img {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    object-fit: cover;
}

.tut-tag-badge {
    display: inline-block;
    padding: 0.3rem 0.75rem;
    background: var(--primary-light);
    color: var(--primary-color);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 9999px;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.tut-tag-badge:hover {
    background: var(--primary-color);
    color: white;
    text-decoration: none;
}

/* Feature Image */
.tut-feature-img {
    margin: 0 0 2rem 0;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
}

.tut-feature-img img {
    width: 100%;
    height: auto;
    display: block;
}

/* Tutorial Body - Content Styles */
.tut-body {
    line-height: 1.8;
    font-size: 1rem;
}

.tut-body h2 {
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    padding-top: 1.5rem;
    border-top: 2px solid var(--border-color);
    font-size: 1.5rem;
    color: var(--text-primary);
}

.tut-body h3 {
    margin-top: 1.75rem;
    margin-bottom: 0.75rem;
    font-size: 1.25rem;
}

.tut-body h4 {
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
}

.tut-body p {
    margin-bottom: 1rem;
}

.tut-body ul,
.tut-body ol {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
}

.tut-body li {
    margin-bottom: 0.4rem;
}

.tut-body img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius-md);
    margin: 1.25rem 0;
}

.tut-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    font-size: 0.9rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    overflow: hidden;
}

.tut-body thead {
    background: var(--primary-color);
    color: white;
}

.tut-body th {
    padding: 0.75rem 1rem;
    text-align: left;
    font-weight: 600;
    font-size: 0.85rem;
}

.tut-body td {
    padding: 0.65rem 1rem;
    border-bottom: 1px solid var(--border-color);
}

.tut-body tbody tr:nth-child(even) {
    background: var(--bg-secondary);
}

.tut-body tbody tr:hover {
    background: var(--primary-light);
}

/* Tags Section */
.tut-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 1.5rem 0;
    border-top: 1px solid var(--border-color);
    margin-top: 2rem;
}

.tut-tag {
    display: inline-block;
    padding: 0.3rem 0.65rem;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    font-size: 0.78rem;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.tut-tag:hover {
    background: var(--primary-light);
    color: var(--primary-color);
    border-color: var(--primary-color);
    text-decoration: none;
}

/* Share Bar */
.tut-share {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 0;
    border-top: 1px solid var(--border-color);
}

.tut-share-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    white-space: nowrap;
}

.tut-share-buttons {
    display: flex;
    gap: 0.5rem;
}

.tut-share-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    color: var(--text-secondary);
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.tut-share-btn:hover { transform: translateY(-2px); }

.tut-share-twitter:hover { background: #1DA1F2; color: white; border-color: #1DA1F2; }
.tut-share-linkedin:hover { background: #0A66C2; color: white; border-color: #0A66C2; }
.tut-share-whatsapp:hover { background: #25D366; color: white; border-color: #25D366; }
.tut-share-copy:hover { background: var(--primary-color); color: white; border-color: var(--primary-color); }
.tut-share-copy.copied { background: var(--success-color); color: white; border-color: var(--success-color); }

/* Old bottom-nav removed - replaced by .tut-bottom-actions in code blocks section */

/* Author Box */
.tut-author-box {
    padding: 1.5rem 0;
    border-top: 1px solid var(--border-color);
}

.tut-author-card {
    display: flex;
    gap: 1rem;
    padding: 1.25rem;
    background: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
}

.tut-author-avatar {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}

.tut-author-info h4 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.tut-author-info p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin: 0;
}

/* Right Sidebar - TOC */
.tutorial-sidebar-right {
    border-left: 1px solid var(--border-color);
}

.sidebar-right-inner {
    position: sticky;
    top: 120px;
    max-height: calc(100vh - 140px);
    overflow-y: auto;
    padding: 1.25rem 0.75rem;
    scrollbar-width: thin;
}

.toc-panel-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-secondary);
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 0.5rem;
}

.toc {
    font-size: 0.8rem;
    line-height: 1.6;
}

.toc a {
    display: block;
    padding: 0.3rem 0.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-left: 2px solid transparent;
    transition: all var(--transition-fast);
}

.toc a:hover {
    color: var(--primary-color);
    border-left-color: var(--primary-color);
    text-decoration: none;
}

.toc a.is-active-link {
    color: var(--primary-color);
    font-weight: 600;
    border-left-color: var(--primary-color);
}

.toc-list {
    padding-left: 0.75rem;
}

/* Mobile Sidebar Toggle */
.sidebar-toggle {
    display: none;
    position: fixed;
    bottom: 5rem;
    left: 1rem;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    border: none;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    z-index: 99;
    transition: all var(--transition-fast);
}

.sidebar-toggle:hover {
    background: var(--primary-dark);
    transform: scale(1.1);
}

/* ============================================
   CODE BLOCKS - macOS-style with traffic lights
   ============================================ */

/* Code block wrapper - created by JS */
.code-block-wrapper {
    position: relative;
    margin: 1.5rem 0;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-color);
    background: #2d2d2d;
}

/* macOS-style header bar */
.code-block-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.6rem 1rem;
    background: #3a3a3a;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.code-block-dots {
    display: flex;
    gap: 6px;
}

.code-block-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.code-block-dots .dot-red { background: #ff5f57; }
.code-block-dots .dot-yellow { background: #ffbd2e; }
.code-block-dots .dot-green { background: #28c840; }

.code-block-lang {
    font-size: 0.72rem;
    color: #999;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-family: var(--font-family);
}

.code-block-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Copy button */
.code-copy-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.3rem 0.7rem;
    background: rgba(255,255,255,0.1);
    color: #ccc;
    border: none;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-size: 0.72rem;
    font-family: var(--font-family);
    transition: all var(--transition-fast);
}

.code-copy-btn:hover {
    background: rgba(255,255,255,0.2);
    color: #fff;
}

.code-copy-btn.copied {
    background: rgba(40, 200, 64, 0.3);
    color: #28c840;
}

/* Try It / Edit & Run button */
.code-tryit-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.3rem 0.7rem;
    background: var(--success-color);
    color: white;
    border: none;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-size: 0.72rem;
    font-weight: 600;
    font-family: var(--font-family);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.code-tryit-btn:hover {
    background: #0ea472;
    color: white;
    text-decoration: none;
}

/* The actual pre/code inside wrapper */
.code-block-wrapper pre {
    margin: 0 !important;
    border: none !important;
    border-radius: 0 !important;
    padding: 1.25rem 1rem !important;
    background: #2d2d2d !important;
    overflow-x: auto;
}

.code-block-wrapper pre code {
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.875rem;
    line-height: 1.6;
}

/* Standalone pre blocks (not wrapped yet) */
.tut-body pre,
.gh-content pre {
    background: #2d2d2d;
    color: #ccc;
    padding: 1.25rem 1rem;
    border-radius: var(--border-radius-lg);
    overflow-x: auto;
    margin: 1.5rem 0;
    position: relative;
    border: 1px solid var(--border-color);
    font-size: 0.875rem;
    line-height: 1.6;
}

.tut-body code,
.gh-content code {
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.875em;
}

.tut-body pre code,
.gh-content pre code {
    background: none;
    padding: 0;
    border-radius: 0;
    color: inherit;
}

/* Inline code */
.tut-body p code,
.tut-body li code,
.tut-body td code,
.gh-content p code,
.gh-content li code,
.gh-content td code {
    background: var(--primary-light);
    color: var(--primary-dark);
    padding: 0.15em 0.45em;
    border-radius: 0.25rem;
    font-size: 0.88em;
    font-weight: 500;
    border: 1px solid var(--border-color);
}

.dark .tut-body p code,
.dark .tut-body li code,
.dark .tut-body td code,
.dark .gh-content p code,
.dark .gh-content li code,
.dark .gh-content td code {
    background: rgba(122, 162, 247, 0.15);
    color: #7AA2F7;
    border-color: rgba(122, 162, 247, 0.2);
}

/* Output/Result block styling */
.code-output {
    margin: -0.5rem 0 1.5rem 0;
    padding: 1rem 1.25rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-top: none;
    border-radius: 0 0 var(--border-radius-lg) var(--border-radius-lg);
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.875rem;
    color: var(--text-primary);
    line-height: 1.5;
    position: relative;
}

.code-output::before {
    content: "Output";
    display: inline-block;
    font-family: var(--font-family);
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    padding: 0.15rem 0.5rem;
    background: var(--bg-tertiary);
    border-radius: var(--border-radius-sm);
}

.code-output pre {
    margin: 0 !important;
    padding: 0 !important;
    background: transparent !important;
    border: none !important;
    font-size: inherit;
}

/* Info/Note boxes - blockquote variants */
.tut-body blockquote {
    border-left: 4px solid var(--primary-color);
    padding: 1rem 1.25rem;
    margin: 1.5rem 0;
    background: var(--bg-secondary);
    border-radius: 0 var(--border-radius-lg) var(--border-radius-lg) 0;
    color: var(--text-secondary);
    position: relative;
}

.tut-body blockquote p:last-child {
    margin-bottom: 0;
}

/* Note variant */
.tut-body blockquote strong:first-child {
    color: var(--primary-color);
    display: inline-block;
    margin-bottom: 0.25rem;
}

/* Print Page Button */
.print-page-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 1rem;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-secondary);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: var(--font-family);
}

.print-page-btn:hover {
    color: var(--primary-color);
    border-color: var(--primary-color);
    background: var(--primary-light);
}

/* Bottom action bar (Print + Prev/Next) */
.tut-bottom-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem 0;
    border-top: 2px solid var(--border-color);
    margin-top: 2rem;
}

.tut-bottom-actions .tut-bottom-btns {
    display: flex;
    gap: 0.5rem;
}

.tut-bottom-actions .btn-prev,
.tut-bottom-actions .btn-next {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.55rem 1.25rem;
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: var(--border-radius-md);
    text-decoration: none;
    transition: all var(--transition-fast);
    font-family: var(--font-family);
}

.tut-bottom-actions .btn-prev {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.tut-bottom-actions .btn-prev:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    text-decoration: none;
}

.tut-bottom-actions .btn-next {
    background: var(--primary-color);
    color: white;
    border: 1px solid var(--primary-color);
}

.tut-bottom-actions .btn-next:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    text-decoration: none;
}

/* Prism.js Overrides */
.token.comment,
.token.prolog,
.token.doctype,
.token.cdata {
    color: #999999;
}

/* Old sidebar/article-footer classes removed - replaced by tutorial-layout system */

/* ============================================
   TAG/CATEGORY PAGE
   ============================================ */

.tag-hero {
    background: linear-gradient(135deg, var(--primary-light) 0%, transparent 100%);
    padding: var(--spacing-2xl) var(--spacing-lg);
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.tag-hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.tag-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-color) 0%, #7AA2F7 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tag-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.tag-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
}

.tag-post-count {
    padding: 0.5rem 1rem;
    background: white;
    border-radius: var(--border-radius-lg);
    font-weight: 600;
    font-size: 0.9rem;
}

.dark .tag-post-count {
    background: var(--bg-secondary);
}

/* ============================================
   PAGINATION
   ============================================ */

.pagination {
    display: flex;
    justify-content: center;
    padding: var(--spacing-2xl) var(--spacing-lg);
}

.pagination-wrapper {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.pagination-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-normal);
}

.pagination-btn:hover {
    border-color: var(--primary-color);
    background: var(--primary-light);
    color: var(--primary-color);
}

.pagination-info {
    font-size: 0.9rem;
    color: var(--text-secondary);
    min-width: 120px;
    text-align: center;
}

/* ============================================
   FOOTER - 4-Column Professional Layout
   ============================================ */

.site-footer {
    background: #1a1a2e;
    color: #a0aec0;
    padding: 3rem 1.5rem 1.5rem;
    margin-top: auto;
}

.dark .site-footer {
    background: #0f0f1a;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto 2rem;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.footer-section h4 {
    color: #fff;
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
}

.footer-section a {
    display: block;
    margin-bottom: 0.5rem;
    color: #a0aec0;
    font-size: 0.85rem;
    transition: color var(--transition-fast);
}

.footer-section a:hover {
    color: #fff;
    text-decoration: none;
}

.footer-logo {
    font-size: 1.25rem;
    color: #fff !important;
    background: linear-gradient(135deg, #7AA2F7 0%, #0066CC 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.75rem;
}

.footer-description {
    font-size: 0.85rem;
    color: #a0aec0;
    line-height: 1.6;
}

.footer-social {
    display: flex;
    gap: 0.75rem;
    margin-top: 1rem;
}

.footer-social a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    color: #a0aec0;
    transition: all var(--transition-fast);
    margin: 0;
}

.footer-social a:hover {
    background: var(--primary-color);
    color: white;
}

.footer-links,
.social-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-links li,
.social-links li {
    margin-bottom: 0.4rem;
}

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    text-align: center;
    font-size: 0.8rem;
    color: #718096;
}

.footer-bottom p {
    margin-bottom: 0.35rem;
}

.footer-bottom a {
    color: #7AA2F7;
}

.footer-bottom a:hover {
    color: #fff;
}

/* ============================================
   UTILITY COMPONENTS
   ============================================ */

.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 99;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-4px);
}

/* Reading Progress Bar */
.reading-progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), #7AA2F7);
    width: 0;
    z-index: 101;
    transition: width 0.1s ease;
}

/* Newsletter Section */
.newsletter-section {
    background: linear-gradient(135deg, var(--primary-light) 0%, transparent 100%);
    padding: var(--spacing-2xl) var(--spacing-lg);
    margin: var(--spacing-2xl) 0 0 0;
}

.newsletter-card {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.newsletter-card h2 {
    margin-bottom: var(--spacing-md);
}

.newsletter-card p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

/* No Posts Message */
.no-posts {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--text-secondary);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

/* Hide right sidebar on medium screens */
@media (max-width: 1200px) {
    .tutorial-layout {
        grid-template-columns: 260px 1fr;
    }
    .tutorial-sidebar-right {
        display: none;
    }
}

/* Hide left sidebar on small screens */
@media (max-width: 1024px) {
    .tutorial-layout {
        grid-template-columns: 1fr;
    }
    .tutorial-sidebar-left {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        width: 280px;
        z-index: 200;
        box-shadow: 4px 0 20px rgba(0,0,0,0.15);
    }
    .tutorial-sidebar-left.is-open {
        display: block;
    }
    .sidebar-left-inner {
        top: 0;
        max-height: 100vh;
        padding-top: 1.5rem;
    }
    .sidebar-toggle {
        display: flex;
    }
    .tutorial-sidebar-right {
        display: none;
    }
    .tutorials-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-base: 15px;
    }
    .nav-wrapper {
        height: 60px;
        gap: 1rem;
    }
    .nav-menu {
        display: none;
    }
    .hero-title {
        font-size: 2rem;
    }
    .tut-title {
        font-size: 1.6rem;
    }
    .tutorial-content {
        padding: 1.25rem 1rem;
    }
    .topbar-inner {
        padding: 0.4rem 0.75rem;
    }
    .breadcrumbs {
        font-size: 0.72rem;
    }
    .tut-bottom-actions {
        flex-direction: column;
        gap: 0.75rem;
    }
    .stats-container {
        grid-template-columns: repeat(2, 1fr);
    }
    .categories-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .search-container {
        flex-direction: column;
    }
    .tutorials-grid {
        grid-template-columns: 1fr;
    }
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-lg: 1rem;
        --spacing-xl: 1.5rem;
    }
    .container {
        padding: 0 1rem;
    }
    .hero-title {
        font-size: 1.5rem;
    }
    .tut-title {
        font-size: 1.35rem;
    }
    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }
    .post-card-image {
        height: 150px;
    }
    .tutorials-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    .stats-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    .tut-share {
        flex-direction: column;
        align-items: flex-start;
    }
    .back-to-top {
        bottom: 1rem;
        right: 1rem;
        width: 40px;
        height: 40px;
    }
    .sidebar-toggle {
        bottom: 4rem;
    }
    .footer-content {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
    .site-header,
    .site-footer,
    .tutorial-sidebar-left,
    .tutorial-sidebar-right,
    .tutorial-topbar,
    .sidebar-toggle,
    .tut-share,
    .tut-bottom-actions,
    .back-to-top,
    .reading-progress-bar,
    .code-block-header,
    .code-copy-btn,
    .code-tryit-btn,
    .print-page-btn,
    .mobile-menu-toggle {
        display: none !important;
    }

    body {
        font-size: 12pt;
        line-height: 1.5;
    }

    .article-container {
        grid-template-columns: 1fr;
        gap: 0;
    }

    a {
        color: #000;
    }

    .article-content {
        color: #000;
    }
}

/* ============================================
   ACCESSIBILITY
   ============================================ */

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

@media (prefers-color-scheme: dark) {
    :root:not(.light) {
        color-scheme: dark;
    }
}

/* ============================================
   GHOST CONTENT STYLES (kg-* classes)
   ============================================ */

.gh-content {
    overflow: hidden;
}

.gh-content > * + * {
    margin-top: var(--spacing-md);
}

.kg-width-wide {
    position: relative;
    width: 85vw;
    min-width: 100%;
    margin: var(--spacing-xl) calc(50% - 42.5vw);
}

.kg-width-full {
    position: relative;
    width: 100vw;
    left: 50%;
    right: 50%;
    margin-left: -50vw;
    margin-right: -50vw;
}

.kg-width-full img,
.kg-width-wide img {
    width: 100%;
}

.kg-image-card,
.kg-gallery-card,
.kg-embed-card,
.kg-code-card {
    margin: var(--spacing-xl) 0;
}

.kg-image-card img {
    border-radius: var(--border-radius-lg);
}

.kg-image-card.kg-width-full img {
    border-radius: 0;
}

.kg-image-card figcaption {
    padding: 0.5rem 0;
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.kg-gallery-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.kg-gallery-row {
    display: flex;
    gap: var(--spacing-md);
}

.kg-gallery-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--border-radius-md);
}

.kg-bookmark-card {
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
}

.kg-bookmark-container {
    display: flex;
    text-decoration: none;
    color: inherit;
}

.kg-bookmark-content {
    flex: 1;
    padding: var(--spacing-lg);
}

.kg-bookmark-title {
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: var(--spacing-sm);
}

.kg-bookmark-description {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.kg-bookmark-metadata {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.kg-bookmark-icon {
    width: 16px;
    height: 16px;
}

.kg-bookmark-thumbnail {
    width: 200px;
    min-height: 160px;
}

.kg-bookmark-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.kg-callout-card {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    border-left: 4px solid var(--primary-color);
    background: var(--bg-secondary);
    margin: var(--spacing-xl) 0;
}

.kg-callout-emoji {
    font-size: 1.5rem;
    line-height: 1;
}

.kg-callout-text {
    line-height: 1.6;
}

.kg-toggle-card {
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    margin: var(--spacing-xl) 0;
}

.kg-toggle-heading {
    padding: var(--spacing-lg);
    cursor: pointer;
    font-weight: 600;
}

.kg-toggle-content {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
}

.kg-button-card {
    text-align: center;
    margin: var(--spacing-xl) 0;
}

.kg-btn {
    display: inline-block;
    padding: 0.75rem 2rem;
    border-radius: var(--border-radius-md);
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-normal);
}

.kg-btn-accent {
    background: var(--primary-color);
    color: white;
}

.kg-btn-accent:hover {
    background: var(--primary-dark);
    color: white;
}

@media (max-width: 768px) {
    .kg-width-wide {
        width: 100%;
        margin-left: 0;
        margin-right: 0;
    }

    .kg-bookmark-container {
        flex-direction: column;
    }

    .kg-bookmark-thumbnail {
        width: 100%;
        min-height: 120px;
    }
}

/* ============================================
   FOCUS STYLES
   ============================================ */

button:focus,
a:focus,
input:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* ============================================
   HOMEPAGE — HERO BADGE & QUICK LINKS
   ============================================ */

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: linear-gradient(135deg, #006600 0%, #009900 100%);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.35rem 0.85rem;
    border-radius: 2rem;
    letter-spacing: 0.03em;
    margin-bottom: 1rem;
    text-transform: uppercase;
}

.hero-quick-links {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1.2rem;
    font-size: 0.85rem;
}

.hero-quick-links > span {
    color: var(--text-secondary);
    font-weight: 500;
}

.hero-quick-tag {
    display: inline-block;
    background: rgba(255,255,255,0.12);
    border: 1px solid rgba(255,255,255,0.25);
    color: #fff;
    padding: 0.25rem 0.7rem;
    border-radius: 1rem;
    font-size: 0.8rem;
    text-decoration: none;
    transition: background var(--transition-fast), border-color var(--transition-fast);
}

.hero-quick-tag:hover {
    background: rgba(255,255,255,0.22);
    border-color: rgba(255,255,255,0.45);
    color: #fff;
}

/* ============================================
   HOMEPAGE — CODINGGROUND / COMPILER PROMO
   ============================================ */

.coding-ground-section {
    background: var(--bg-secondary);
    padding: 4rem 1.5rem;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.coding-ground-inner {
    max-width: 1100px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

@media (max-width: 768px) {
    .coding-ground-inner {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

/* Mock editor preview */
.coding-ground-preview {
    display: flex;
    justify-content: center;
}

.cg-editor-mock {
    background: #1e1e2e;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0,0,0,0.25);
    width: 100%;
    max-width: 420px;
    font-family: 'Courier New', monospace;
}

.cg-editor-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1rem;
    background: #2a2a3e;
    border-bottom: 1px solid #3a3a5e;
}

.cg-editor-header .dot-red   { width: 12px; height: 12px; border-radius: 50%; background: #ff5f56; display: inline-block; }
.cg-editor-header .dot-yellow{ width: 12px; height: 12px; border-radius: 50%; background: #ffbd2e; display: inline-block; }
.cg-editor-header .dot-green { width: 12px; height: 12px; border-radius: 50%; background: #27c93f; display: inline-block; }

.cg-filename {
    color: #a9b1d6;
    font-size: 0.78rem;
    margin-left: 0.5rem;
    flex: 1;
}

.cg-run-btn {
    background: #27c93f;
    color: #fff;
    font-size: 0.72rem;
    padding: 0.2rem 0.6rem;
    border-radius: 0.25rem;
    font-weight: 600;
    cursor: pointer;
}

.cg-editor-body {
    padding: 1.2rem 1.2rem 1rem;
    font-size: 0.82rem;
    line-height: 1.8;
}

.cg-line {
    color: #c0caf5;
}

.cg-kw  { color: #7aa2f7; }
.cg-str { color: #9ece6a; }

.cg-output-line {
    color: #a9b1d6;
    padding-left: 1rem;
    border-left: 2px solid #27c93f;
    margin-top: 0.25rem;
    font-style: italic;
    opacity: 0.85;
}

/* CodingGround text side */
.coding-ground-text h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    line-height: 1.25;
}

.cg-highlight {
    color: var(--primary-color);
}

.coding-ground-text p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.7;
    margin-bottom: 1.25rem;
}

.cg-lang-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.cg-lang-pills span {
    background: var(--primary-light);
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    border-radius: 1rem;
    padding: 0.2rem 0.7rem;
    font-size: 0.78rem;
    font-weight: 600;
}

.cg-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--primary-color);
    color: #fff;
    font-size: 0.95rem;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    text-decoration: none;
    transition: background var(--transition-fast), transform var(--transition-fast);
    box-shadow: 0 4px 14px rgba(0,102,204,0.3);
}

.cg-btn:hover {
    background: var(--primary-dark);
    color: #fff;
    transform: translateY(-1px);
}

/* ============================================
   HOMEPAGE — CATEGORIES GRID
   ============================================ */

.home-categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 1rem;
    margin-top: 2rem;
}

.home-cat-card {
    display: flex;
    align-items: center;
    gap: 0.9rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1rem 1rem;
    text-decoration: none;
    color: var(--text-primary);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}

.home-cat-card:hover {
    border-color: var(--primary-color);
    box-shadow: 0 4px 16px rgba(0,102,204,0.12);
    transform: translateY(-2px);
    color: var(--text-primary);
}

.home-cat-icon {
    width: 48px;
    height: 48px;
    border-radius: 0.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.home-cat-info {
    flex: 1;
    min-width: 0;
}

.home-cat-name {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.15rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.home-cat-count {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.home-cat-arrow {
    color: var(--text-secondary);
    flex-shrink: 0;
    opacity: 0.5;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.home-cat-card:hover .home-cat-arrow {
    opacity: 1;
    transform: translateX(3px);
}

.all-categories-btn-wrap {
    text-align: center;
    margin-top: 2rem;
}

.all-categories-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    font-size: 0.9rem;
    font-weight: 600;
    padding: 0.65rem 1.5rem;
    border-radius: 0.5rem;
    text-decoration: none;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.all-categories-btn:hover {
    background: var(--primary-color);
    color: #fff;
}

@media (max-width: 640px) {
    .home-categories-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 400px) {
    .home-categories-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   TUTORIAL — PRACTICE BAR & TOPBAR COMPILER BTN
   ============================================ */

.topbar-btn-compiler {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark)) !important;
    color: #fff !important;
    font-weight: 600;
}

.topbar-btn-compiler:hover {
    opacity: 0.88;
    color: #fff !important;
}

.tut-practice-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    background: linear-gradient(135deg, var(--primary-light) 0%, #e8f4ff 100%);
    border: 1px solid var(--primary-color);
    border-radius: 0.75rem;
    padding: 1rem 1.25rem;
    margin: 1.5rem 0;
}

.practice-bar-left {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    color: var(--primary-dark);
    font-size: 0.9rem;
    font-weight: 500;
}

.practice-bar-left svg {
    color: var(--primary-color);
    flex-shrink: 0;
}

.practice-compiler-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: var(--primary-color);
    color: #fff;
    font-size: 0.85rem;
    font-weight: 600;
    padding: 0.55rem 1.1rem;
    border-radius: 0.4rem;
    text-decoration: none;
    white-space: nowrap;
    transition: background var(--transition-fast), transform var(--transition-fast);
    flex-shrink: 0;
}

.practice-compiler-btn:hover {
    background: var(--primary-dark);
    color: #fff;
    transform: translateY(-1px);
}

@media (max-width: 560px) {
    .tut-practice-bar {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }
}

/* ============================================
   COMPILERS PAGE
   ============================================ */

.compilers-page {
    background: var(--bg-primary);
    min-height: 100vh;
}

/* Hero */
.compilers-hero {
    background: linear-gradient(135deg, #0a0f2e 0%, #0d1b5e 60%, #1a2a6c 100%);
    color: #fff;
    padding: 3.5rem 1.5rem 3rem;
    text-align: center;
}

.compilers-hero-inner {
    max-width: 700px;
    margin: 0 auto;
}

.compilers-hero-title {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 0.75rem;
    line-height: 1.15;
}

.compilers-hero-sub {
    font-size: 1rem;
    color: rgba(255,255,255,0.8);
    line-height: 1.6;
    margin-bottom: 1.5rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.compilers-hero-badges {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.6rem;
}

.compilers-hero-badges span {
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.25);
    color: #fff;
    padding: 0.3rem 0.85rem;
    border-radius: 1rem;
    font-size: 0.8rem;
    font-weight: 500;
}

/* Workspace */
.compiler-workspace {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1.5rem;
}

/* Language tabs */
.lang-tabs-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin-bottom: 0;
    border-bottom: 2px solid var(--border-color);
}

.lang-tabs {
    display: flex;
    gap: 0;
    min-width: max-content;
    padding-bottom: 0;
}

.lang-tab {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.65rem 1rem;
    background: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    color: var(--text-secondary);
    font-size: 0.82rem;
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
    transition: color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
    margin-bottom: -2px;
}

.lang-tab:hover {
    color: var(--primary-color);
    background: var(--bg-secondary);
}

.lang-tab.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    font-weight: 700;
    background: var(--bg-secondary);
}

/* Language icon badges */
.lang-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border-radius: 4px;
    font-size: 0.62rem;
    font-weight: 800;
    color: #fff;
    flex-shrink: 0;
}

.lang-python  { background: #3776AB; }
.lang-java    { background: #ED8B00; }
.lang-js      { background: #F7DF1E; color: #000; }
.lang-c       { background: #A8B9CC; color: #000; }
.lang-cpp     { background: #00599C; font-size: 0.55rem; }
.lang-cs      { background: #9B4F96; }
.lang-php     { background: #777BB4; }
.lang-html    { background: #E34F26; font-size: 0.5rem; }
.lang-ts      { background: #3178C6; }
.lang-go      { background: #00ACD7; }
.lang-rust    { background: #B7410E; }
.lang-kotlin  { background: #7F52FF; }
.lang-swift   { background: #FA7343; }
.lang-sql     { background: #336791; }
.lang-ruby    { background: #CC342D; }

/* Compiler frame */
.compiler-frame-container {
    border: 1px solid var(--border-color);
    border-top: none;
    border-radius: 0 0 0.75rem 0.75rem;
    overflow: hidden;
    background: var(--bg-secondary);
}

.compiler-frame-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 1rem;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
}

.compiler-frame-dots {
    display: flex;
    gap: 5px;
    align-items: center;
}

.compiler-frame-title {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-secondary);
    flex: 1;
}

.compiler-open-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.78rem;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    padding: 0.25rem 0.6rem;
    border: 1px solid var(--primary-color);
    border-radius: 0.3rem;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.compiler-open-btn:hover {
    background: var(--primary-color);
    color: #fff;
}

.compiler-iframe {
    width: 100%;
    height: 520px;
    border: none;
    display: block;
    background: #1e1e2e;
}

@media (max-width: 768px) {
    .compiler-iframe {
        height: 420px;
    }
}

/* All compilers grid */
.compilers-all {
    background: var(--bg-secondary);
    padding: 3rem 1.5rem;
    margin-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.compilers-all-inner {
    max-width: 1100px;
    margin: 0 auto;
}

.compilers-all h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.4rem;
    color: var(--text-primary);
}

.compilers-all > .compilers-all-inner > p {
    color: var(--text-secondary);
    margin-bottom: 1.75rem;
}

.compilers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 0.85rem;
}

.compiler-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1.25rem 0.75rem 1rem;
    text-decoration: none;
    color: var(--text-primary);
    cursor: pointer;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
    text-align: center;
}

.compiler-card:hover {
    border-color: var(--primary-color);
    box-shadow: 0 4px 16px rgba(0,102,204,0.12);
    transform: translateY(-3px);
    color: var(--text-primary);
}

.compiler-card-icon {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    font-size: 0.65rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    margin-bottom: 0.25rem;
}

.compiler-card-name {
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--text-primary);
    display: block;
}

.compiler-card-desc {
    font-size: 0.72rem;
    color: var(--text-secondary);
    display: block;
    line-height: 1.3;
}

/* Tips section */
.compiler-tips {
    padding: 3rem 1.5rem;
    background: var(--bg-primary);
}

.compiler-tips-inner {
    max-width: 1100px;
    margin: 0 auto;
}

.compiler-tips h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.3rem;
    color: var(--text-primary);
}

.compiler-tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-top: 1.75rem;
}

.compiler-tip {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1.25rem;
}

.tip-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--primary-color);
    color: #fff;
    font-size: 0.88rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.compiler-tip h3 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.4rem;
}

.compiler-tip p {
    font-size: 0.84rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

@media (max-width: 600px) {
    .compilers-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .compilers-hero-title {
        font-size: 1.6rem;
        flex-direction: column;
        gap: 0.4rem;
    }

    .compiler-card {
        padding: 0.9rem 0.5rem 0.75rem;
    }
}

@media (max-width: 380px) {
    .compilers-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ============================================
   QUIZ PAGE
   ============================================ */

.quiz-page-layout {
    max-width: 860px;
    margin: 0 auto;
    padding: 2rem 1.5rem 3rem;
}

.quiz-content {
    background: var(--bg-primary);
    border-radius: 0.75rem;
}

/* Quiz header */
.quiz-header {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
}

.quiz-header-icon {
    width: 56px;
    height: 56px;
    border-radius: 0.75rem;
    background: var(--primary-light);
    border: 1px solid var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    flex-shrink: 0;
}

.quiz-title {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.4rem;
    line-height: 1.25;
}

.quiz-subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.6rem;
}

.quiz-meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.quiz-meta-item {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.78rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.quiz-badge {
    background: var(--primary-light);
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    padding: 0.15rem 0.6rem;
    border-radius: 1rem;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.04em;
}

/* Instructions */
.quiz-instructions {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--primary-color);
    border-radius: 0.5rem;
    padding: 0.8rem 1rem;
    font-size: 0.88rem;
    color: var(--text-secondary);
    margin-bottom: 1.75rem;
    line-height: 1.5;
}

/* Question cards */
.quiz-q-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1.25rem 1.5rem;
    margin-bottom: 1.25rem;
    transition: border-color var(--transition-fast);
}

.quiz-q-card:hover {
    border-color: #c0d0e8;
}

.quiz-q-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.75rem;
    gap: 0.75rem;
}

.quiz-q-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 28px;
    padding: 0 0.6rem;
    background: var(--primary-color);
    color: #fff;
    border-radius: 0.35rem;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.04em;
}

.quiz-q-text {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.55;
    margin-bottom: 1rem;
}

/* Options list */
.quiz-options {
    list-style: none;
    margin: 0 0 0.5rem;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.quiz-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.65rem 0.9rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 0.88rem;
    color: var(--text-primary);
    cursor: default;
    transition: background var(--transition-fast), border-color var(--transition-fast);
}

.quiz-option.correct {
    background: #f0fdf4;
    border-color: #22c55e;
    color: #15803d;
    font-weight: 600;
}

[data-theme="dark"] .quiz-option.correct {
    background: #14290d;
    border-color: #22c55e;
    color: #4ade80;
}

.opt-letter {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--border-color);
    color: var(--text-secondary);
    font-size: 0.72rem;
    font-weight: 700;
    flex-shrink: 0;
}

.quiz-option.correct .opt-letter {
    background: #22c55e;
    color: #fff;
}

.opt-text {
    flex: 1;
}

/* Show Answer button */
.show-answer-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.4rem 1rem;
    background: var(--primary-color);
    color: #fff;
    border: none;
    border-radius: 0.4rem;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition-fast), opacity var(--transition-fast);
    white-space: nowrap;
}

.show-answer-btn:hover {
    background: var(--primary-dark);
}

.show-answer-btn.answered {
    background: #22c55e;
    cursor: default;
    opacity: 0.85;
}

/* Answer reveal */
.quiz-answer {
    margin-top: 0.85rem;
    background: #f0fdf4;
    border: 1px solid #22c55e;
    border-radius: 0.5rem;
    padding: 0.75rem 1rem;
}

[data-theme="dark"] .quiz-answer {
    background: #14290d;
    border-color: #22c55e;
}

.ans-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.82rem;
    font-weight: 700;
    color: #15803d;
    margin-bottom: 0.4rem;
}

[data-theme="dark"] .ans-badge {
    color: #4ade80;
}

.ans-exp {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.55;
    margin: 0.4rem 0 0;
}

/* Quiz footer */
.quiz-footer {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.quiz-back-btn,
.quiz-compiler-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.6rem 1.2rem;
    border-radius: 0.5rem;
    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.quiz-back-btn {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.quiz-back-btn:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

.quiz-compiler-btn {
    background: var(--primary-color);
    color: #fff;
    border: 1px solid transparent;
}

.quiz-compiler-btn:hover {
    background: var(--primary-dark);
    color: #fff;
}

@media (max-width: 560px) {
    .quiz-header {
        flex-direction: column;
    }

    .quiz-q-header {
        flex-wrap: wrap;
    }

    .quiz-footer {
        flex-wrap: wrap;
    }

    .quiz-title {
        font-size: 1.3rem;
    }
}

/* End of v5.0 additions */

/* ============================================
   CATEGORIES PAGE (page-categories.hbs)
   ============================================ */

.categories-page {
    background: var(--bg-primary);
    min-height: 100vh;
}

/* Hero */
.cat-page-hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: #fff;
    padding: 2.5rem 1.5rem 2rem;
}

.cat-page-hero-inner {
    max-width: 1100px;
    margin: 0 auto;
}

.cat-page-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 2rem;
    font-weight: 800;
    color: #fff;
    margin: 0 0 0.5rem;
}

.cat-page-sub {
    font-size: 1rem;
    color: rgba(255,255,255,0.85);
    margin-bottom: 1rem;
    line-height: 1.5;
}

.cat-page-stats {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.cat-stat {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.9);
}

.cat-stat strong {
    font-weight: 700;
    color: #fff;
}

.cat-stat-dot {
    color: rgba(255,255,255,0.45);
    font-size: 0.9rem;
}

/* Page layout */
.cat-page-content {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1.5rem 3rem;
    display: grid;
    grid-template-columns: 1fr 260px;
    gap: 2rem;
    align-items: start;
}

@media (max-width: 900px) {
    .cat-page-content {
        grid-template-columns: 1fr;
    }
    .cat-page-sidebar {
        order: -1;
    }
}

/* Filter / Search bar */
.cat-filter-bar {
    margin-bottom: 1.5rem;
}

.cat-search-wrap {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    background: var(--bg-primary);
    border: 1.5px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 0.6rem 0.9rem;
    max-width: 380px;
    transition: border-color var(--transition-fast);
}

.cat-search-wrap:focus-within {
    border-color: var(--primary-color);
}

.cat-search-wrap svg {
    color: var(--text-secondary);
    flex-shrink: 0;
}

.cat-search-input {
    border: none;
    outline: none;
    background: transparent;
    font-size: 0.9rem;
    color: var(--text-primary);
    width: 100%;
}

.cat-search-input::placeholder {
    color: var(--text-secondary);
}

/* Full categories grid */
.cat-full-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
    gap: 0.9rem;
}

.cat-full-card {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 0.9rem 1rem;
    text-decoration: none;
    color: var(--text-primary);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}

.cat-full-card:hover {
    border-color: var(--primary-color);
    box-shadow: 0 4px 16px rgba(0,102,204,0.1);
    transform: translateY(-2px);
    color: var(--text-primary);
}

/* Icon */
.cat-full-icon {
    width: 46px;
    height: 46px;
    border-radius: 0.5rem;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.cat-icon-letter {
    background: var(--primary-light);
    color: var(--primary-color);
    font-size: 0.8rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.02em;
    border: 1px solid var(--primary-color);
}

.cat-icon-img {
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    border: 1px solid var(--border-color);
}

.cat-full-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.cat-full-name {
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.cat-full-desc {
    font-size: 0.72rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.3;
}

.cat-full-count {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.7rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-top: 0.1rem;
}

.cat-full-arrow {
    color: var(--text-secondary);
    flex-shrink: 0;
    opacity: 0.4;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.cat-full-card:hover .cat-full-arrow {
    opacity: 1;
    transform: translateX(3px);
}

/* Empty / no results */
.cat-no-results {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 3rem 1rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
    text-align: center;
    grid-column: 1 / -1;
}

.cat-no-results svg {
    color: var(--border-color);
}

/* Sidebar */
.cat-page-sidebar {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.cat-sidebar-box {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1.25rem;
}

.cat-sidebar-box h3 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.9rem;
    padding-bottom: 0.6rem;
    border-bottom: 1px solid var(--border-color);
}

.cat-sidebar-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.cat-sidebar-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0;
    font-size: 0.85rem;
    color: var(--text-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.cat-sidebar-link:hover {
    color: var(--primary-color);
}

.cat-sidebar-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--primary-color);
    flex-shrink: 0;
    opacity: 0.7;
}

.cat-sidebar-num {
    margin-left: auto;
    font-size: 0.75rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.1rem 0.45rem;
    border-radius: 1rem;
    font-weight: 600;
}

/* Sidebar CTA */
.cat-sidebar-cta {
    background: linear-gradient(135deg, var(--primary-light) 0%, #e0efff 100%);
    border-color: var(--primary-color);
    text-align: center;
}

.cat-cta-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.cat-sidebar-cta h3 {
    border-bottom: none;
    margin-bottom: 0.4rem;
    padding-bottom: 0;
    color: var(--primary-dark);
}

.cat-sidebar-cta p {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 0.9rem;
}

.cat-cta-btn {
    display: inline-block;
    background: var(--primary-color);
    color: #fff;
    font-size: 0.85rem;
    font-weight: 600;
    padding: 0.5rem 1.25rem;
    border-radius: 0.4rem;
    text-decoration: none;
    transition: background var(--transition-fast);
}

.cat-cta-btn:hover {
    background: var(--primary-dark);
    color: #fff;
}

@media (max-width: 600px) {
    .cat-full-grid {
        grid-template-columns: 1fr 1fr;
    }
    .cat-page-title {
        font-size: 1.5rem;
    }
}

@media (max-width: 380px) {
    .cat-full-grid {
        grid-template-columns: 1fr;
    }
}

/* End of categories page styles */

/* ============================================
   HEADER — TWO-ROW NAVIGATION (v5.2)
   ============================================ */

/* ── Compiler shortcut button in top nav ── */
.nav-compiler-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    background: var(--primary-color);
    color: #fff !important;
    font-size: 0.8rem;
    font-weight: 600;
    padding: 0.4rem 0.9rem;
    border-radius: 0.4rem;
    text-decoration: none;
    white-space: nowrap;
    transition: background var(--transition-fast);
}

.nav-compiler-btn:hover {
    background: var(--primary-dark);
    color: #fff !important;
}

/* ── Hamburger button ── */
.nav-hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 36px;
    height: 36px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 0.35rem;
}

.nav-hamburger span {
    display: block;
    height: 2px;
    width: 22px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: transform 0.2s, opacity 0.2s;
}

.nav-hamburger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.is-open span:nth-child(2) { opacity: 0; }
.nav-hamburger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── CATEGORY BAR (Row 2) ── */
.category-bar {
    background: var(--primary-color);
    border-top: 1px solid rgba(255,255,255,0.12);
    overflow: hidden;
}

[data-theme="dark"] .category-bar,
.dark .category-bar {
    background: #0a1628;
    border-top-color: rgba(255,255,255,0.08);
}

.category-bar-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    gap: 0;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.category-bar-inner::-webkit-scrollbar {
    display: none;
}

.cat-bar-link {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.55rem 0.85rem;
    color: rgba(255,255,255,0.88);
    font-size: 0.82rem;
    font-weight: 500;
    text-decoration: none;
    white-space: nowrap;
    border-bottom: 2px solid transparent;
    transition: color var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast);
}

.cat-bar-link:hover,
.cat-bar-link.active {
    color: #fff;
    background: rgba(255,255,255,0.12);
    border-bottom-color: #fff;
}

.cat-bar-all {
    font-weight: 700;
    color: #fff;
}

.cat-bar-divider {
    width: 1px;
    height: 18px;
    background: rgba(255,255,255,0.2);
    flex-shrink: 0;
    margin: 0 0.25rem;
}

.cat-bar-more {
    display: inline-flex;
    align-items: center;
    gap: 0.2rem;
    padding: 0.55rem 0.85rem;
    color: rgba(255,255,255,0.75);
    font-size: 0.8rem;
    font-weight: 600;
    text-decoration: none;
    white-space: nowrap;
    margin-left: auto;
    flex-shrink: 0;
    transition: color var(--transition-fast);
}

.cat-bar-more:hover {
    color: #fff;
}

/* ── MOBILE NAV panel ── */
.mobile-nav {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
    max-height: 80vh;
    overflow-y: auto;
}

.mobile-nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 1.5rem 1.5rem;
}

.mobile-nav-list {
    list-style: none;
    padding: 0;
    margin: 0 0 0.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.mobile-nav-link {
    display: block;
    padding: 0.6rem 0.5rem;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-primary);
    text-decoration: none;
    border-radius: 0.35rem;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
    background: var(--bg-secondary);
    color: var(--primary-color);
}

.mobile-nav-divider {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 0.75rem 0;
}

.mobile-nav-section-label {
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 0.6rem;
}

.mobile-nav-cats {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.mobile-cat-pill {
    display: inline-block;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 0.8rem;
    font-weight: 500;
    padding: 0.3rem 0.75rem;
    border-radius: 1rem;
    text-decoration: none;
    transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.mobile-cat-pill:hover {
    background: var(--primary-light);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.mobile-cat-more {
    background: var(--primary-light);
    border-color: var(--primary-color);
    color: var(--primary-color);
    font-weight: 700;
}

.mobile-compiler-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: var(--primary-color);
    color: #fff;
    font-size: 0.88rem;
    font-weight: 600;
    padding: 0.6rem 1.2rem;
    border-radius: 0.5rem;
    text-decoration: none;
    transition: background var(--transition-fast);
}

.mobile-compiler-btn:hover {
    background: var(--primary-dark);
    color: #fff;
}

/* ── Responsive: show hamburger, hide cat-bar on mobile ── */
@media (max-width: 900px) {
    .nav-compiler-btn {
        display: none; /* shown in mobile menu instead */
    }

    .nav-hamburger {
        display: flex;
    }

    .nav-menu {
        display: none; /* hide top nav links on mobile; they're in mobile panel */
    }
}

@media (max-width: 600px) {
    .category-bar {
        display: none; /* on very small screens show mobile panel instead */
    }
}

/* End of two-row nav styles */

/* ============================================
   QUIZ v2 — ENHANCED INTERACTIONS & SCORE
   ============================================ */

/* Clickable option — selected state */
.quiz-option {
    cursor: pointer;
    user-select: none;
    position: relative;
    transition: background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.quiz-option:hover:not(.opt-correct):not(.opt-wrong):not(.opt-selected) {
    background: var(--bg-tertiary);
    border-color: #b0c4de;
    transform: translateX(2px);
}

/* Selected (before submit) */
.quiz-option.opt-selected {
    background: #fffbeb;
    border-color: #f59e0b;
    color: #92400e;
    font-weight: 500;
}

.quiz-option.opt-selected .opt-letter {
    background: #f59e0b;
    color: #fff;
}

[data-theme="dark"] .quiz-option.opt-selected {
    background: #2d1f00;
    border-color: #f59e0b;
    color: #fcd34d;
}

/* Correct after submit */
.quiz-option.opt-correct {
    background: #f0fdf4;
    border-color: #22c55e;
    color: #15803d;
    font-weight: 600;
    cursor: default;
}

.quiz-option.opt-correct .opt-letter {
    background: #22c55e;
    color: #fff;
}

[data-theme="dark"] .quiz-option.opt-correct {
    background: #14290d;
    border-color: #22c55e;
    color: #4ade80;
}

/* Wrong (user selected but incorrect) */
.quiz-option.opt-wrong {
    background: #fff5f5;
    border-color: #ef4444;
    color: #b91c1c;
    font-weight: 500;
    cursor: default;
}

.quiz-option.opt-wrong .opt-letter {
    background: #ef4444;
    color: #fff;
}

[data-theme="dark"] .quiz-option.opt-wrong {
    background: #290d0d;
    border-color: #ef4444;
    color: #fca5a5;
}

/* Tick / Cross icons on options */
.opt-icon {
    margin-left: auto;
    flex-shrink: 0;
    display: flex;
    align-items: center;
}

.opt-tick  { color: #22c55e; }
.opt-cross { color: #ef4444; }

/* Show/Hide toggle button states */
.show-answer-btn {
    transition: background var(--transition-fast), color var(--transition-fast);
}

/* when answer is revealed, button turns outlined grey */
.show-answer-btn.hide-mode {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

/* Quiz bottom action bar */
.quiz-bottom-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.quiz-submit-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: var(--primary-color);
    color: #fff;
    border: none;
    border-radius: 0.5rem;
    font-size: 0.9rem;
    font-weight: 700;
    padding: 0.7rem 1.5rem;
    cursor: pointer;
    transition: background var(--transition-fast), transform var(--transition-fast);
    box-shadow: 0 4px 12px rgba(0,102,204,0.25);
}

.quiz-submit-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

/* ── SCORE PANEL ── */
.quiz-score-panel {
    display: flex;
    align-items: center;
    gap: 2.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 2rem 2.5rem;
    margin: 2rem 0;
    flex-wrap: wrap;
}

/* Donut chart */
.score-chart-wrap {
    position: relative;
    flex-shrink: 0;
    width: 120px;
    height: 120px;
}

.score-donut {
    display: block;
}

.donut-bg {
    stroke: var(--border-color);
}

.donut-arc {
    stroke: #22c55e;
    transition: stroke-dasharray 0.8s ease, stroke 0.5s ease;
}

.score-center-text {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.score-pct {
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1;
}

/* Score info */
.score-info {
    flex: 1;
    min-width: 200px;
}

.score-heading {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--text-primary);
    margin: 0 0 0.3rem;
}

.score-subtext {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.score-stats {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
}

.score-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 64px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 0.6rem;
    padding: 0.6rem 1rem;
}

.stat-num {
    font-size: 1.5rem;
    font-weight: 800;
    line-height: 1;
}

.stat-label {
    font-size: 0.72rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-top: 0.2rem;
}

.score-stat-correct .stat-num { color: #22c55e; }
.score-stat-wrong   .stat-num { color: #ef4444; }
.score-stat-skip    .stat-num { color: #f59e0b; }

/* Score action buttons */
.score-actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.score-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.6rem 1.2rem;
    border-radius: 0.45rem;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: background var(--transition-fast), transform var(--transition-fast);
}

.score-btn:hover {
    transform: translateY(-1px);
}

.score-btn-review {
    background: var(--primary-color);
    color: #fff;
}

.score-btn-review:hover {
    background: var(--primary-dark);
}

.score-btn-retry {
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.score-btn-retry:hover {
    background: var(--bg-tertiary);
}

@media (max-width: 560px) {
    .quiz-score-panel {
        flex-direction: column;
        align-items: flex-start;
        padding: 1.5rem;
        gap: 1.5rem;
    }

    .quiz-bottom-bar {
        flex-wrap: wrap;
    }

    .score-stats {
        gap: 0.6rem;
    }
}

/* End of Quiz v2 styles */

/* ============================================
   TUTORIAL — QUIZ CTA SECTION
   ============================================ */

.tut-quiz-cta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    background: linear-gradient(135deg, #0a1628 0%, #0d2050 100%);
    border-radius: 0.85rem;
    padding: 1.4rem 1.6rem;
    margin: 1.75rem 0;
    flex-wrap: wrap;
}

.tut-quiz-cta-left {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex: 1;
    min-width: 0;
}

.tut-quiz-icon {
    width: 52px;
    height: 52px;
    border-radius: 0.6rem;
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.18);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    flex-shrink: 0;
}

.tut-quiz-heading {
    font-size: 1rem;
    font-weight: 700;
    color: #fff;
    margin: 0 0 0.25rem;
    line-height: 1.3;
}

.tut-quiz-sub {
    font-size: 0.82rem;
    color: rgba(255,255,255,0.72);
    margin: 0;
    line-height: 1.45;
}

.tut-quiz-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    background: #f59e0b;
    color: #1a1a1a;
    font-size: 0.88rem;
    font-weight: 700;
    padding: 0.7rem 1.4rem;
    border-radius: 0.5rem;
    text-decoration: none;
    white-space: nowrap;
    flex-shrink: 0;
    transition: background var(--transition-fast), transform var(--transition-fast);
    box-shadow: 0 4px 14px rgba(245,158,11,0.35);
}

.tut-quiz-btn:hover {
    background: #d97706;
    color: #fff;
    transform: translateY(-1px);
}

@media (max-width: 600px) {
    .tut-quiz-cta {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    .tut-quiz-btn {
        width: 100%;
        justify-content: center;
    }
} /* close @media (max-width: 600px) */

/* ══════════════════════════════════════════════════════════════
   HOMEPAGE PROFESSIONAL REDESIGN  (prefix: hp-)
   ══════════════════════════════════════════════════════════════ */

/* ── HERO ─────────────────────────────────────────────────── */
.hp-hero {
    background: linear-gradient(135deg, #0F172A 0%, #1E3A8A 60%, #1E40AF 100%);
    padding: 5rem 1.5rem;
    position: relative;
    overflow: hidden;
}
.hp-hero::before {
    content: '';
    position: absolute;
    top: -40%;
    right: -15%;
    width: 55%;
    height: 180%;
    background: radial-gradient(ellipse, rgba(99,102,241,.18) 0%, transparent 65%);
    pointer-events: none;
}
.hp-hero-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}
.hp-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    background: rgba(255,255,255,.1);
    color: rgba(255,255,255,.92);
    border: 1px solid rgba(255,255,255,.2);
    padding: .4rem 1rem;
    border-radius: 9999px;
    font-size: .8rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}
.hp-hero-text h1 {
    font-size: 3.25rem;
    font-weight: 800;
    color: #fff;
    line-height: 1.12;
    margin-bottom: 1.25rem;
    letter-spacing: -0.02em;
}
.hp-accent { color: #60A5FA; }
.dark .hp-accent { color: #93C5FD; }
.hp-hero-text > p {
    font-size: 1.1rem;
    color: rgba(255,255,255,.72);
    margin-bottom: 2rem;
    line-height: 1.75;
}
.hp-search-wrap {
    display: flex;
    align-items: center;
    gap: .5rem;
    background: #fff;
    border-radius: 12px;
    padding: .5rem .5rem .5rem 1rem;
    box-shadow: 0 20px 50px rgba(0,0,0,.35);
    margin-bottom: 1.5rem;
}
.hp-search-wrap svg { color: #9CA3AF; flex-shrink: 0; }
.hp-search-inp {
    flex: 1;
    border: none;
    background: transparent;
    font-size: .95rem;
    color: #1F2937;
    outline: none;
    min-width: 0;
}
.hp-search-inp::placeholder { color: #9CA3AF; }
.hp-search-btn {
    background: #2563EB;
    color: #fff;
    border: none;
    padding: .65rem 1.5rem;
    border-radius: 8px;
    font-weight: 700;
    font-size: .9rem;
    cursor: pointer;
    transition: background .2s;
    white-space: nowrap;
    flex-shrink: 0;
}
.hp-search-btn:hover { background: #1D4ED8; }
.hp-quick-links {
    display: flex;
    align-items: center;
    gap: .5rem;
    flex-wrap: wrap;
}
.hp-quick-links > span { color: rgba(255,255,255,.5); font-size: .8rem; }
.hp-quick-tag {
    background: rgba(255,255,255,.1);
    color: rgba(255,255,255,.88);
    border: 1px solid rgba(255,255,255,.18);
    padding: .25rem .75rem;
    border-radius: 9999px;
    font-size: .8rem;
    text-decoration: none;
    transition: background .2s;
}
.hp-quick-tag:hover { background: rgba(255,255,255,.2); color: #fff; text-decoration: none; }
/* Hero code mock */
.hp-hero-visual { display: flex; justify-content: flex-end; }
.hp-code-mock {
    width: 100%;
    max-width: 420px;
    border-radius: 14px;
    overflow: hidden;
    box-shadow: 0 30px 70px rgba(0,0,0,.55);
    background: #1E1E2E;
    border: 1px solid rgba(255,255,255,.1);
}
.hp-code-bar, .hp-cc-bar {
    display: flex;
    align-items: center;
    gap: .4rem;
    background: #13131F;
    padding: .7rem 1rem;
}
.dot { width: 12px; height: 12px; border-radius: 50%; }
.dot.r { background: #FF5F57; }
.dot.y { background: #FFBD2E; }
.dot.g { background: #28C840; }
.hp-code-file, .hp-cc-file {
    margin-left: .5rem;
    font-size: .75rem;
    color: rgba(255,255,255,.4);
    font-family: monospace;
}
.hp-code-run, .hp-cc-run {
    margin-left: auto;
    background: #2563EB;
    color: #fff;
    font-size: .7rem;
    padding: .2rem .65rem;
    border-radius: 4px;
    font-weight: 600;
}
.hp-cc-run { background: #16A34A; }
.hp-code-body, .hp-cc-body {
    padding: 1.25rem;
    font-family: 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
    font-size: .875rem;
    line-height: 1.9;
}
.hp-code-line, .hp-cc-line { display: block; }
.pl2 { padding-left: 1.5rem; }
.ck { color: #C792EA; }
.cf { color: #82AAFF; }
.cs { color: #C3E88D; }
.cv { color: #F78C6C; }
.cc { color: #546E7A; font-style: italic; }
.hp-code-out, .hp-cc-out {
    margin-top: .75rem;
    padding: .45rem .75rem;
    background: rgba(34,197,94,.1);
    border-left: 3px solid #22C55E;
    color: #86EFAC;
    font-size: .8rem;
    font-family: monospace;
    border-radius: 0 4px 4px 0;
}

/* ── STATS ────────────────────────────────────────────────── */
.hp-stats {
    background: #fff;
    border-bottom: 1px solid #E5E7EB;
}
.dark .hp-stats { background: var(--bg-secondary); border-color: var(--border-color); }
.hp-stats-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
}
.hp-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: .4rem;
    padding: 2.25rem 1.5rem;
    text-align: center;
    border-right: 1px solid #E5E7EB;
}
.dark .hp-stat { border-color: var(--border-color); }
.hp-stat:last-child { border-right: none; }
.hp-stat-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: #F8FAFC;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: .35rem;
}
.dark .hp-stat-icon { background: var(--bg-tertiary); }
.hp-stat-num {
    font-size: 2.1rem;
    font-weight: 800;
    color: #0F172A;
    line-height: 1;
}
.dark .hp-stat-num { color: var(--text-primary); }
.hp-stat-lbl {
    font-size: .75rem;
    font-weight: 600;
    color: #6B7280;
    text-transform: uppercase;
    letter-spacing: .06em;
}

/* ── SHARED SECTION HEADERS ───────────────────────────────── */
.hp-sec-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 2.5rem;
    gap: 1rem;
    flex-wrap: wrap;
}
.hp-sec-title {
    font-size: 2rem;
    font-weight: 800;
    color: #0F172A;
    margin: 0 0 .35rem;
    letter-spacing: -0.02em;
}
.dark .hp-sec-title { color: var(--text-primary); }
.hp-sec-sub {
    font-size: .925rem;
    color: #6B7280;
    margin: 0;
    line-height: 1.5;
}
.hp-sec-link {
    color: #2563EB;
    font-size: .875rem;
    font-weight: 600;
    text-decoration: none;
    white-space: nowrap;
    padding-top: .3rem;
    transition: opacity .2s;
}
.hp-sec-link:hover { opacity: .7; text-decoration: none; }

/* ── MASTER THIS MONTH ────────────────────────────────────── */
.hp-month {
    padding: 5rem 1.5rem;
    background: #F8FAFC;
}
.dark .hp-month { background: var(--bg-secondary); }
.hp-month-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
}
.hp-month-card {
    background: #fff;
    border: 1.5px solid #E5E7EB;
    border-radius: 14px;
    padding: 1.4rem;
    display: flex;
    flex-direction: column;
    gap: .55rem;
    transition: transform .2s, box-shadow .2s, border-color .2s;
    position: relative;
}
.dark .hp-month-card { background: var(--bg-tertiary); border-color: var(--border-color); }
.hp-month-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(37,99,235,.12);
    border-color: #2563EB;
}
.hp-month-card.hp-month-current {
    border-color: #2563EB;
    background: linear-gradient(135deg, #EFF6FF 0%, #fff 100%);
    box-shadow: 0 6px 24px rgba(37,99,235,.14);
}
.dark .hp-month-card.hp-month-current {
    background: linear-gradient(135deg, rgba(37,99,235,.15), var(--bg-tertiary));
    border-color: #60A5FA;
}
.hp-mc-now {
    display: inline-flex;
    align-items: center;
    gap: .3rem;
    background: #2563EB;
    color: #fff;
    font-size: .65rem;
    font-weight: 800;
    padding: 3px 10px;
    border-radius: 9999px;
    text-transform: uppercase;
    letter-spacing: .06em;
    width: fit-content;
    margin-bottom: .1rem;
}
.hp-mc-month {
    font-size: .68rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: .1em;
    color: #9CA3AF;
}
.hp-month-current .hp-mc-month { color: #2563EB; }
.hp-mc-icon { font-size: 2rem; line-height: 1; }
.hp-mc-info h3 {
    font-size: .9rem;
    font-weight: 700;
    margin: 0 0 .2rem;
    color: #0F172A;
}
.dark .hp-mc-info h3 { color: var(--text-primary); }
.hp-mc-info p {
    font-size: .76rem;
    color: #6B7280;
    margin: 0;
    line-height: 1.45;
}
.hp-mc-level {
    display: inline-block;
    font-size: .63rem;
    font-weight: 700;
    padding: 2px 10px;
    border-radius: 9999px;
    text-transform: uppercase;
    letter-spacing: .05em;
    width: fit-content;
}
.hp-mc-level.beginner   { background: #DCFCE7; color: #16A34A; }
.hp-mc-level.intermediate { background: #DBEAFE; color: #2563EB; }
.hp-mc-level.advanced   { background: #FEE2E2; color: #DC2626; }
.hp-mc-level.essential  { background: #F3E8FF; color: #7C3AED; }
.hp-mc-level.capstone   { background: #FEF3C7; color: #D97706; }
.hp-mc-cta {
    margin-top: auto;
    font-size: .8rem;
    font-weight: 700;
    color: #2563EB;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: .25rem;
    padding-top: .3rem;
    transition: gap .15s;
}
.hp-mc-cta:hover { gap: .5rem; text-decoration: none; color: #1D4ED8; }
.dark .hp-mc-cta { color: #60A5FA; }

/* ── TUTORIALS LIBRARY ────────────────────────────────────── */
.hp-library {
    padding: 5rem 1.5rem;
    background: #fff;
}
.dark .hp-library { background: var(--bg-primary); }
.hp-lib-wrap {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 2rem;
    align-items: stretch; /* sidebar stretches to match grid height */
}
.hp-lib-sidebar {
    background: #15803D;
    border-radius: 14px;
    padding: .75rem .6rem;
    display: flex;
    flex-direction: column;
    gap: .15rem;
    align-self: stretch; /* fills full grid row height */
    overflow-y: auto;
    max-height: 580px; /* scroll when tags list is very long */
    scrollbar-width: thin;
    scrollbar-color: rgba(255,255,255,.3) transparent;
}
.hp-lib-sidebar::-webkit-scrollbar { width: 4px; }
.hp-lib-sidebar::-webkit-scrollbar-thumb { background: rgba(255,255,255,.35); border-radius: 4px; }
.hp-lib-sb-label {
    font-size: .7rem;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: rgba(255,255,255,.55);
    padding: .5rem 1rem .4rem;
}
.hp-lib-cat {
    display: flex;
    align-items: center;
    gap: .6rem;
    padding: .6rem .9rem;
    border-radius: 9px;
    background: transparent;
    border: none;
    color: rgba(255,255,255,.82);
    font-size: .82rem;
    font-weight: 500;
    cursor: pointer;
    text-align: left;
    text-decoration: none;
    transition: background .15s, color .15s;
    width: 100%;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.hp-lib-cat:hover { background: rgba(255,255,255,.14); color: #fff; text-decoration: none; }
.hp-lib-cat.on { background: rgba(255,255,255,.18); color: #fff; }
.hp-lib-cat svg { flex-shrink: 0; opacity: .6; }
.hp-lib-cat span {
    margin-left: auto;
    flex-shrink: 0;
    background: rgba(255,255,255,.18);
    color: rgba(255,255,255,.9);
    font-size: .65rem;
    font-weight: 700;
    padding: 1px 6px;
    border-radius: 9999px;
    min-width: 18px;
    text-align: center;
}
.hp-lib-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: .875rem;
    align-content: start; /* cards pack from top, don't stretch to fill */
}
.hp-lib-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: .7rem;
    padding: 1.5rem 1rem;
    background: #fff;
    border: 1.5px solid #E5E7EB;
    border-radius: 14px;
    text-decoration: none;
    color: #0F172A;
    text-align: center;
    transition: transform .2s, box-shadow .2s, border-color .2s;
    cursor: pointer;
}
.dark .hp-lib-card { background: var(--bg-tertiary); border-color: var(--border-color); color: var(--text-primary); }
.hp-lib-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0,0,0,.09);
    border-color: #15803D;
    text-decoration: none;
    color: #0F172A;
}
.dark .hp-lib-card:hover { color: var(--text-primary); }
.hp-lib-logo {
    width: 56px;
    height: 56px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 800;
    font-size: 1.1rem;
    flex-shrink: 0;
    overflow: hidden;
    background: #E5E7EB; /* fallback until JS sets color */
}
.hp-lib-logo img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 8px;
}
.hp-lib-logo.hp-lib-auto {
    font-size: .95rem;
    font-weight: 800;
    letter-spacing: .02em;
}
.hp-lib-card strong {
    font-size: .875rem;
    font-weight: 700;
    display: block;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
}
.hp-lib-card > span { font-size: .75rem; color: #6B7280; }

/* ── CODING COMPILER ──────────────────────────────────────── */
.hp-compiler {
    background: #0F172A;
    padding: 5rem 1.5rem;
}
.hp-compiler-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}
.hp-compiler-code {
    border-radius: 14px;
    overflow: hidden;
    background: #1E1E2E;
    border: 1px solid rgba(255,255,255,.1);
    box-shadow: 0 30px 60px rgba(0,0,0,.5);
}
.hp-compiler-badge {
    display: inline-block;
    background: #15803D;
    color: #fff;
    font-size: .72rem;
    font-weight: 700;
    padding: .3rem .9rem;
    border-radius: 9999px;
    text-transform: uppercase;
    letter-spacing: .09em;
    margin-bottom: 1.25rem;
}
.hp-compiler-text h2 {
    font-size: 2.5rem;
    font-weight: 800;
    color: #fff;
    line-height: 1.2;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}
.hp-compiler-text p {
    font-size: 1.05rem;
    color: rgba(255,255,255,.65);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}
.hp-compiler-langs {
    display: flex;
    flex-wrap: wrap;
    gap: .5rem;
    margin-bottom: 2rem;
}
.hp-compiler-langs span {
    background: rgba(255,255,255,.08);
    color: rgba(255,255,255,.8);
    border: 1px solid rgba(255,255,255,.12);
    padding: .3rem .9rem;
    border-radius: 9999px;
    font-size: .8rem;
    font-weight: 600;
}
.hp-compiler-btn {
    display: inline-flex;
    align-items: center;
    gap: .75rem;
    background: #15803D;
    color: #fff;
    padding: .9rem 2rem;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 700;
    text-decoration: none;
    transition: background .2s, transform .2s;
}
.hp-compiler-btn:hover { background: #166534; transform: translateY(-2px); text-decoration: none; color: #fff; }

/* ── CODING PROBLEMS ──────────────────────────────────────── */
.hp-problems {
    padding: 5rem 1.5rem;
    background: #F8FAFC;
}
.dark .hp-problems { background: var(--bg-secondary); }
.hp-prob-filters {
    display: flex;
    gap: .5rem;
    flex-wrap: wrap;
    margin-bottom: 1.25rem;
}
.hp-pf {
    padding: .45rem 1.25rem;
    border-radius: 9999px;
    background: #fff;
    border: 1.5px solid #E5E7EB;
    font-size: .82rem;
    font-weight: 700;
    color: #6B7280;
    cursor: pointer;
    transition: all .15s;
}
.dark .hp-pf { background: var(--bg-tertiary); border-color: var(--border-color); color: var(--text-secondary); }
.hp-pf:hover { border-color: #2563EB; color: #2563EB; }
.hp-pf.on { background: #2563EB; color: #fff; border-color: #2563EB; }
.hp-prob-grid {
    display: flex;
    flex-direction: column;
    background: #fff;
    border: 1.5px solid #E5E7EB;
    border-radius: 14px;
    overflow: hidden;
}
.dark .hp-prob-grid { background: var(--bg-tertiary); border-color: var(--border-color); }
.hp-prob-row {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid #F3F4F6;
    text-decoration: none;
    color: #0F172A;
    transition: background .15s;
}
.dark .hp-prob-row { color: var(--text-primary); border-color: var(--border-color); }
.hp-prob-row:last-child { border-bottom: none; }
.hp-prob-row:hover { background: #F8FAFC; text-decoration: none; color: #0F172A; }
.dark .hp-prob-row:hover { background: var(--bg-secondary); color: var(--text-primary); }
.hp-prob-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.hp-prob-info { flex: 1; min-width: 0; }
.hp-prob-info h4 { font-size: .9rem; font-weight: 700; margin: 0 0 .18rem; color: #0F172A; }
.dark .hp-prob-info h4 { color: var(--text-primary); }
.hp-prob-info p { font-size: .76rem; color: #6B7280; margin: 0; line-height: 1.4; }
.hp-diff {
    font-size: .7rem;
    font-weight: 800;
    padding: .25rem .8rem;
    border-radius: 9999px;
    text-transform: uppercase;
    letter-spacing: .05em;
    flex-shrink: 0;
}
.hp-diff.easy   { background: #DCFCE7; color: #15803D; }
.hp-diff.medium { background: #FEF3C7; color: #D97706; }
.hp-diff.hard   { background: #FEE2E2; color: #DC2626; }
.hp-prob-cnt {
    font-size: .76rem;
    font-weight: 600;
    color: #9CA3AF;
    white-space: nowrap;
    flex-shrink: 0;
}

/* ── DEVELOPER TOOLBOX ────────────────────────────────────── */
.hp-toolbox {
    padding: 5rem 1.5rem;
    background: #FFFBEB;
}
.dark .hp-toolbox { background: var(--bg-primary); }
.hp-tool-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
}
.hp-tool-card {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: .65rem;
    padding: 1.4rem;
    background: #fff;
    border: 1.5px solid #E5E7EB;
    border-radius: 14px;
    text-decoration: none;
    color: #0F172A;
    transition: transform .2s, box-shadow .2s, border-color .2s;
}
.dark .hp-tool-card { background: var(--bg-tertiary); border-color: var(--border-color); color: var(--text-primary); }
.hp-tool-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0,0,0,.09);
    border-color: #D97706;
    text-decoration: none;
    color: #0F172A;
}
.dark .hp-tool-card:hover { color: var(--text-primary); }
.hp-tool-icon {
    width: 46px;
    height: 46px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.hp-tool-card strong { font-size: .88rem; font-weight: 700; margin: 0; }
.hp-tool-card > span { font-size: .76rem; color: #6B7280; line-height: 1.4; }

/* ── LATEST TUTORIALS ─────────────────────────────────────── */
.hp-tutorials {
    padding: 5rem 1.5rem;
    background: #fff;
}
.dark .hp-tutorials { background: var(--bg-primary); }

/* ── NEWSLETTER ───────────────────────────────────────────── */
.hp-newsletter {
    padding: 5rem 1.5rem;
    background: linear-gradient(135deg, #1E3A8A 0%, #2563EB 100%);
}
.hp-nl-card {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 2rem;
    background: rgba(255,255,255,.1);
    border: 1px solid rgba(255,255,255,.2);
    border-radius: 20px;
    padding: 2.5rem 3rem;
}
.hp-nl-icon { color: rgba(255,255,255,.75); flex-shrink: 0; }
.hp-nl-text { flex: 1; }
.hp-nl-text h2 { font-size: 1.5rem; font-weight: 700; color: #fff; margin: 0 0 .5rem; }
.hp-nl-text p { font-size: .95rem; color: rgba(255,255,255,.72); margin: 0; }
.hp-nl-action { flex-shrink: 0; }

/* ── RESPONSIVE ───────────────────────────────────────────── */
@media (max-width: 1024px) {
    .hp-hero-inner { grid-template-columns: 1fr; }
    .hp-hero-visual { display: none; }
    .hp-hero-text h1 { font-size: 2.75rem; }
    .hp-month-grid { grid-template-columns: repeat(3, 1fr); }
    .hp-tool-grid { grid-template-columns: repeat(2, 1fr); }
    .hp-lib-wrap { grid-template-columns: 1fr; }
    .hp-lib-sidebar {
        align-self: auto;
        max-height: 180px;
        flex-direction: row;
        flex-wrap: nowrap;
        overflow-x: auto;
        overflow-y: hidden;
        background: #15803D;
        border-radius: 12px;
        padding: .5rem;
        scrollbar-width: thin;
        scrollbar-color: rgba(255,255,255,.3) transparent;
    }
    .hp-lib-sb-label { display: none; }
    .hp-lib-cat { white-space: nowrap; flex-shrink: 0; min-width: auto; }
    .hp-lib-grid { grid-template-columns: repeat(3, 1fr); }
    .hp-compiler-inner { grid-template-columns: 1fr; }
    .hp-compiler-code { display: none; }
    .hp-stats-inner { grid-template-columns: repeat(4, 1fr); }
}
@media (max-width: 768px) {
    .hp-hero { padding: 3.5rem 1.25rem; }
    .hp-hero-text h1 { font-size: 2.1rem; }
    .hp-stats-inner { grid-template-columns: repeat(2, 1fr); }
    .hp-stat { border-right: 1px solid #E5E7EB; }
    .hp-stat:nth-child(2n) { border-right: none; }
    .hp-month-grid { grid-template-columns: repeat(2, 1fr); }
    .hp-lib-grid { grid-template-columns: repeat(2, 1fr); }
    .hp-sec-head { flex-direction: column; gap: .5rem; }
    .hp-nl-card { flex-direction: column; text-align: center; padding: 2rem 1.5rem; }
    .hp-prob-cnt { display: none; }
    .hp-compiler-text h2 { font-size: 2rem; }
    .hp-sec-title { font-size: 1.625rem; }
}
@media (max-width: 480px) {
    .hp-hero { padding: 2.5rem 1rem; }
    .hp-hero-text h1 { font-size: 1.75rem; }
    .hp-month-grid { grid-template-columns: 1fr; }
    .hp-tool-grid { grid-template-columns: 1fr; }
    .hp-lib-grid { grid-template-columns: repeat(2, 1fr); }
    .hp-search-wrap { border-radius: 10px; }
    .hp-search-btn { padding: .6rem 1rem; }
}

/* ═══════════════════════════════════════════════════════════════
   TOP TOPICS CAROUSEL (hp-topics)
═══════════════════════════════════════════════════════════════ */
.hp-topics {
    padding: 4rem 0 3rem;
    background: #F8FAFC;
}
.dark-mode .hp-topics { background: #1A1B2E; }

.hp-carousel-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.hp-nav-btn {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    border: 2px solid #E5E7EB;
    background: #fff;
    color: #374151;
    font-size: 1.1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    flex-shrink: 0;
}
.hp-nav-btn:hover {
    background: #2563EB;
    border-color: #2563EB;
    color: #fff;
}
.dark-mode .hp-nav-btn {
    background: #252633;
    border-color: #374151;
    color: #D1D5DB;
}
.dark-mode .hp-nav-btn:hover {
    background: #3B82F6;
    border-color: #3B82F6;
    color: #fff;
}

.hp-topics-carousel {
    display: flex;
    gap: 20px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    padding: 0.5rem 0 1.5rem;
    scrollbar-width: thin;
    scrollbar-color: #CBD5E1 transparent;
}
.hp-topics-carousel::-webkit-scrollbar { height: 5px; }
.hp-topics-carousel::-webkit-scrollbar-thumb { background: #CBD5E1; border-radius: 10px; }
.hp-topics-carousel::-webkit-scrollbar-track { background: transparent; }

.hp-tc-card {
    flex: 0 0 252px;
    min-height: 260px;
    border-radius: 16px;
    padding: 1.5rem 1.25rem 1.25rem;
    display: flex;
    flex-direction: column;
    position: relative;
    scroll-snap-align: start;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    transition: transform 0.25s, box-shadow 0.25s;
    overflow: hidden;
    color: #fff;
}
.hp-tc-card::before {
    content: '';
    position: absolute;
    top: -30px; right: -30px;
    width: 120px; height: 120px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    pointer-events: none;
}
.hp-tc-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 32px rgba(0,0,0,0.25);
}

.hp-tc-badge {
    display: inline-block;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    padding: 0.2rem 0.55rem;
    border-radius: 20px;
    background: rgba(255,255,255,0.25);
    color: #fff;
    margin-bottom: 0.5rem;
    width: fit-content;
}
.hp-tc-badge.hot    { background: rgba(239,68,68,0.35); }
.hp-tc-badge.trending { background: rgba(245,158,11,0.35); }
.hp-tc-badge.new    { background: rgba(99,102,241,0.35); }
.hp-tc-badge.essential { background: rgba(16,185,129,0.35); }
.hp-tc-badge.capstone { background: rgba(249,115,22,0.35); }

.hp-tc-icon {
    font-size: 2.2rem;
    margin: 0.25rem 0 0.5rem;
    line-height: 1;
}
.hp-tc-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: #fff;
    margin: 0 0 0.3rem;
    line-height: 1.2;
}
.hp-tc-desc {
    font-size: 0.8rem;
    color: rgba(255,255,255,0.85);
    line-height: 1.4;
    flex: 1;
    margin: 0;
}
.hp-tc-views {
    font-size: 0.72rem;
    font-weight: 600;
    color: rgba(255,255,255,0.7);
    margin: 0.75rem 0 0.5rem;
}
.hp-tc-cta {
    display: inline-block;
    background: rgba(255,255,255,0.2);
    color: #fff;
    padding: 0.4rem 0.9rem;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 600;
    text-decoration: none;
    transition: background 0.2s;
    width: fit-content;
    border: 1px solid rgba(255,255,255,0.3);
}
.hp-tc-cta:hover {
    background: rgba(255,255,255,0.35);
    color: #fff;
    text-decoration: none;
}

/* ═══════════════════════════════════════════════════════════════
   ALL COMPILERS LANGUAGE GRID (hp-all-langs)
═══════════════════════════════════════════════════════════════ */
.hp-all-langs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 1.25rem 0;
}
.hp-lang-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 0.4rem 0.85rem;
    border-radius: 8px;
    font-size: 0.8rem;
    font-weight: 600;
    text-decoration: none;
    color: var(--lc, #2563EB);
    background: color-mix(in srgb, var(--lc, #2563EB) 12%, transparent);
    border: 1.5px solid color-mix(in srgb, var(--lc, #2563EB) 30%, transparent);
    transition: all 0.2s;
}
.hp-lang-btn:hover {
    background: var(--lc, #2563EB);
    color: #fff;
    text-decoration: none;
    transform: translateY(-1px);
    box-shadow: 0 3px 10px color-mix(in srgb, var(--lc, #2563EB) 40%, transparent);
}
/* Fallback for browsers without color-mix */
@supports not (color: color-mix(in srgb, red, blue)) {
    .hp-lang-btn {
        background: #EFF6FF;
        border-color: #BFDBFE;
    }
    .hp-lang-btn:hover {
        background: #2563EB;
        color: #fff;
    }
}
.dark-mode .hp-lang-btn {
    background: rgba(255,255,255,0.06);
    border-color: rgba(255,255,255,0.12);
    color: #D1D5DB;
}
.dark-mode .hp-lang-btn:hover {
    background: var(--lc, #3B82F6);
    color: #fff;
    border-color: var(--lc, #3B82F6);
}

/* Replace the old hp-compiler-langs with new grid */
.hp-compiler-langs { display: none; }

/* ═══════════════════════════════════════════════════════════════
   RESPONSIVE UPDATES FOR NEW SECTIONS
═══════════════════════════════════════════════════════════════ */
@media (max-width: 768px) {
    .hp-tc-card { flex: 0 0 210px; min-height: 240px; }
    .hp-carousel-controls { gap: 0.4rem; }
    .hp-carousel-controls .hp-sec-link { display: none; }
    .hp-all-langs { gap: 6px; }
    .hp-lang-btn { font-size: 0.75rem; padding: 0.35rem 0.7rem; }
}
@media (max-width: 480px) {
    .hp-tc-card { flex: 0 0 185px; min-height: 220px; padding: 1.2rem 1rem 1rem; }
    .hp-tc-icon { font-size: 1.8rem; }
    .hp-tc-title { font-size: 1rem; }
}