/* ========================================
   DevRoadmaps — Style System
   ======================================== */

/* === CSS Custom Properties === */
:root {
    --bg-primary: #0a0a1a;
    --bg-secondary: #111128;
    --bg-tertiary: #1a1a3e;
    --bg-card: #16163a;
    --bg-glass: rgba(22, 22, 58, 0.7);
    --bg-hover: #222255;
    --text-primary: #e8e8ff;
    --text-secondary: #a0a0cc;
    --text-muted: #6a6a99;
    --accent: #7c5cfc;
    --accent-hover: #9a7aff;
    --accent-glow: rgba(124, 92, 252, 0.3);
    --gradient-1: #7c5cfc;
    --gradient-2: #ff6b9d;
    --gradient-3: #00d4ff;
    --border: rgba(124, 92, 252, 0.2);
    --border-hover: rgba(124, 92, 252, 0.4);
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 48px rgba(0, 0, 0, 0.4);
    --radius: 12px;
    --radius-lg: 20px;
    --radius-sm: 8px;
    --transition: 0.3s ease;
    --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
    --font-mono: 'Fira Code', 'Cascadia Code', monospace;
    --cat-fundamentals: #7c5cfc;
    --cat-intermediate: #00d4ff;
    --cat-advanced: #ff6b9d;
    --cat-tools: #ffc107;
    --navbar-height: 64px;
}

[data-theme="light"] {
    --bg-primary: #f5f5ff;
    --bg-secondary: #eeeef8;
    --bg-tertiary: #e0e0f0;
    --bg-card: #ffffff;
    --bg-glass: rgba(255, 255, 255, 0.7);
    --bg-hover: #d8d8f0;
    --text-primary: #1a1a3e;
    --text-secondary: #444466;
    --text-muted: #888899;
    --border: rgba(124, 92, 252, 0.15);
    --border-hover: rgba(124, 92, 252, 0.3);
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 48px rgba(0, 0, 0, 0.12);
}

/* === Reset & Base === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: var(--font);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    transition: background var(--transition), color var(--transition);
}

/* === Scrollbar === */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent-hover); }

/* === Typography === */
h1 { font-size: 3rem; font-weight: 800; line-height: 1.1; letter-spacing: -0.02em; }
h2 { font-size: 2.25rem; font-weight: 700; line-height: 1.2; }
h3 { font-size: 1.5rem; font-weight: 600; }
h4 { font-size: 1.125rem; font-weight: 600; }
p { color: var(--text-secondary); }
a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-hover); }

/* === Layout === */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-alt { background: var(--bg-secondary); }

/* === Navbar === */
.navbar {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    background: var(--bg-glass);
    backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    height: var(--navbar-height);
    transition: background var(--transition);
}
.nav-container {
    max-width: 1200px; margin: 0 auto; padding: 0 24px;
    display: flex; align-items: center; justify-content: space-between;
    height: 100%;
}
.nav-logo { font-size: 1.25rem; font-weight: 700; color: var(--text-primary); white-space: nowrap; }
.nav-logo:hover { color: var(--text-primary); }
.nav-links { display: flex; gap: 24px; align-items: center; }
.nav-links a { color: var(--text-secondary); font-size: 0.9rem; font-weight: 500; }
.nav-links a:hover { color: var(--text-primary); }
.nav-cta {
    background: var(--accent) !important; color: #fff !important;
    padding: 8px 16px; border-radius: var(--radius-sm); font-weight: 600 !important;
}
.nav-cta:hover { background: var(--accent-hover) !important; }
.hamburger { display: none; background: none; border: none; cursor: pointer; flex-direction: column; gap: 5px; }
.hamburger span { display: block; width: 24px; height: 2px; background: var(--text-primary); transition: var(--transition); border-radius: 2px; }

/* === Hero === */
.hero {
    min-height: 100vh; display: flex; align-items: center; justify-content: center;
    padding: 120px 24px 80px; text-align: center; position: relative;
}
.hero-content { max-width: 800px; z-index: 1; }
.hero-badge {
    display: inline-block; padding: 6px 16px; border-radius: 50px;
    background: var(--bg-glass); border: 1px solid var(--border);
    font-size: 0.85rem; font-weight: 500; color: var(--accent);
    backdrop-filter: blur(10px); margin-bottom: 24px;
}
.hero-title { margin-bottom: 24px; }
.hero-subtitle { color: var(--text-secondary); font-weight: 400; font-size: 0.7em; }
.gradient-text {
    background: linear-gradient(135deg, var(--gradient-1), var(--gradient-2), var(--gradient-3));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
    background-size: 200% 200%;
    animation: gradientShift 4s ease infinite;
}
@keyframes gradientShift { 0%,100% { background-position: 0% 50%; } 50% { background-position: 100% 50%; } }
.hero-desc { font-size: 1.15rem; margin-bottom: 32px; max-width: 600px; margin-inline: auto; }
.hero-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 48px; }

/* === Buttons === */
.btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 12px 24px; border-radius: var(--radius-sm); font-weight: 600;
    font-size: 0.95rem; border: none; cursor: pointer; transition: all var(--transition);
    text-decoration: none;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 8px 24px var(--accent-glow); color: #fff; }
.btn-secondary { background: var(--bg-tertiary); color: var(--text-primary); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--bg-hover); border-color: var(--border-hover); color: var(--text-primary); }
.btn-sm { padding: 8px 16px; font-size: 0.8rem; border-radius: var(--radius-sm); background: var(--bg-tertiary); color: var(--text-secondary); border: 1px solid var(--border); }
.btn-sm:hover { background: var(--bg-hover); color: var(--text-primary); }
.btn-lg { padding: 16px 32px; font-size: 1.1rem; }

/* === Stats === */
.hero-stats { display: flex; gap: 32px; justify-content: center; flex-wrap: wrap; }
.stat-item { text-align: center; }
.stat-number { display: block; font-size: 2rem; font-weight: 800; color: var(--accent); }
.stat-suffix { font-size: 1.5rem; font-weight: 800; color: var(--accent); }
.stat-label { font-size: 0.85rem; color: var(--text-muted); }

/* === Section Title === */
.section-title { text-align: center; margin-bottom: 16px; }
.section-subtitle { text-align: center; color: var(--text-muted); margin-bottom: 48px; font-size: 1.1rem; }

/* === Roadmaps Grid === */
.roadmaps-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}
.roadmap-card {
    background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg);
    padding: 32px; cursor: pointer; transition: all var(--transition); position: relative; overflow: hidden;
    text-decoration: none; color: inherit; display: block;
}
.roadmap-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
    background: linear-gradient(90deg, var(--gradient-1), var(--gradient-2));
    opacity: 0; transition: opacity var(--transition);
}
.roadmap-card:hover {
    transform: translateY(-4px); border-color: var(--border-hover);
    box-shadow: var(--shadow-lg);
}
.roadmap-card:hover::before { opacity: 1; }
.roadmap-card:hover .roadmap-card-icon { transform: scale(1.1); }
.roadmap-card-icon { font-size: 2.5rem; margin-bottom: 16px; display: block; transition: transform var(--transition); }
.roadmap-card h3 { margin-bottom: 8px; font-size: 1.25rem; }
.roadmap-card p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 16px; }
.roadmap-card-meta { display: flex; gap: 16px; font-size: 0.8rem; color: var(--text-muted); }
.roadmap-card-meta span { display: flex; align-items: center; gap: 4px; }

/* === Features Grid === */
.features-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 24px; }
.feature-card {
    background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
    padding: 24px; transition: all var(--transition);
}
.feature-card:hover { border-color: var(--border-hover); transform: translateY(-2px); box-shadow: var(--shadow); }
.feature-icon { font-size: 2rem; margin-bottom: 12px; }
.feature-card h3 { margin-bottom: 8px; font-size: 1.1rem; }
.feature-card p { font-size: 0.9rem; color: var(--text-muted); }

/* === Testimonials === */
.testimonials-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 24px; }
.testimonial-card {
    background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
    padding: 32px; transition: all var(--transition);
}
.testimonial-card:hover { border-color: var(--border-hover); }
.testimonial-text { font-size: 1rem; line-height: 1.7; margin-bottom: 20px; font-style: italic; color: var(--text-secondary); }
.testimonial-author { display: flex; align-items: center; gap: 12px; }
.author-avatar {
    width: 40px; height: 40px; border-radius: 50%; background: var(--accent);
    display: flex; align-items: center; justify-content: center; color: #fff;
    font-size: 0.8rem; font-weight: 700; flex-shrink: 0;
}
.testimonial-author div { font-size: 0.85rem; }
.testimonial-author strong { color: var(--text-primary); }

/* === FAQ === */
.faq-list { max-width: 700px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-question {
    width: 100%; background: none; border: none; padding: 20px 0;
    font-size: 1rem; font-weight: 600; color: var(--text-primary); cursor: pointer;
    display: flex; justify-content: space-between; align-items: center;
    text-align: left; font-family: var(--font); transition: color var(--transition);
}
.faq-question:hover { color: var(--accent); }
.faq-question span { font-size: 1.5rem; color: var(--accent); transition: transform var(--transition); }
.faq-item.active .faq-question span { transform: rotate(45deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease; }
.faq-item.active .faq-answer { max-height: 200px; }
.faq-answer p { padding-bottom: 20px; font-size: 0.95rem; }

/* === CTA === */
.cta-section { padding: 80px 0; }
.cta-card {
    background: linear-gradient(135deg, var(--gradient-1), var(--gradient-2));
    border-radius: var(--radius-lg); padding: 64px 32px; text-align: center;
}
.cta-card h2 { color: #fff; margin-bottom: 12px; font-size: 2rem; }
.cta-card p { color: rgba(255,255,255,0.85); margin-bottom: 32px; font-size: 1.1rem; }
.cta-card .btn-primary { background: #fff; color: var(--gradient-1); }
.cta-card .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.2); }

/* === Footer === */
.footer { padding: 48px 0; border-top: 1px solid var(--border); }
.footer-content { text-align: center; }
.footer-brand { margin-bottom: 24px; }
.footer-brand p { font-size: 0.9rem; margin-top: 8px; }
.footer-links { display: flex; gap: 24px; justify-content: center; margin-bottom: 24px; }
.footer-links a { color: var(--text-muted); font-size: 0.9rem; }
.footer-bottom { font-size: 0.8rem; color: var(--text-muted); }

/* === Back to Top === */
.back-to-top {
    position: fixed; bottom: 24px; right: 24px; z-index: 999;
    width: 44px; height: 44px; border-radius: 50%; border: 1px solid var(--border);
    background: var(--bg-glass); backdrop-filter: blur(10px);
    color: var(--text-primary); font-size: 1.2rem; cursor: pointer;
    transition: all var(--transition); opacity: 0; transform: translateY(20px); pointer-events: none;
}
.back-to-top.visible { opacity: 1; transform: translateY(0); pointer-events: auto; }
.back-to-top:hover { background: var(--accent); color: #fff; border-color: var(--accent); }

/* === Theme Toggle === */
.theme-toggle {
    position: fixed; bottom: 24px; left: 24px; z-index: 999;
    width: 44px; height: 44px; border-radius: 50%; border: 1px solid var(--border);
    background: var(--bg-glass); backdrop-filter: blur(10px);
    font-size: 1.2rem; cursor: pointer; transition: all var(--transition);
}
.theme-toggle:hover { background: var(--bg-hover); }

/* === Particles Canvas === */
#particles {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    z-index: -1; pointer-events: none;
}

/* === Roadmap Page === */
.roadmap-page .hero { min-height: auto; padding: 100px 24px 32px; }
.back-link { display: inline-flex; color: var(--text-muted); font-size: 0.9rem; margin-bottom: 16px; }
.back-link:hover { color: var(--accent); }
.roadmap-header { background: var(--bg-glass); backdrop-filter: blur(20px); border-bottom: 1px solid var(--border); }
.roadmap-title-area { display: flex; align-items: center; gap: 16px; margin-bottom: 12px; }
.roadmap-icon { font-size: 2.5rem; }
.roadmap-header h1 { font-size: 2rem; }
.roadmap-desc { color: var(--text-muted); margin-bottom: 24px; }

.roadmap-controls { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin-bottom: 20px; }
.search-box { flex: 1; min-width: 200px; }
.search-box input {
    width: 100%; padding: 10px 16px; border-radius: var(--radius-sm);
    border: 1px solid var(--border); background: var(--bg-primary);
    color: var(--text-primary); font-family: var(--font); font-size: 0.9rem;
    transition: border-color var(--transition);
}
.search-box input:focus { outline: none; border-color: var(--accent); }
.filter-buttons { display: flex; gap: 8px; flex-wrap: wrap; }
.filter-btn {
    padding: 8px 14px; border-radius: var(--radius-sm); border: 1px solid var(--border);
    background: transparent; color: var(--text-muted); font-size: 0.8rem;
    cursor: pointer; transition: all var(--transition); font-family: var(--font);
}
.filter-btn:hover { border-color: var(--border-hover); color: var(--text-primary); }
.filter-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.action-buttons { display: flex; gap: 8px; }

/* === Progress Bar === */
.progress-bar-container { display: flex; align-items: center; gap: 12px; }
.progress-bar { flex: 1; height: 6px; background: var(--bg-tertiary); border-radius: 3px; overflow: hidden; }
.progress-fill { height: 100%; background: linear-gradient(90deg, var(--gradient-1), var(--gradient-2)); border-radius: 3px; transition: width 0.5s ease; width: 0%; }
.progress-text { font-size: 0.85rem; font-weight: 600; color: var(--accent); min-width: 40px; }

/* === Roadmap Layout === */
.roadmap-main { padding: 40px 0 80px; }
.roadmap-layout { display: flex; gap: 24px; }

/* === Minimap === */
.minimap {
    position: sticky; top: 80px; width: 200px; min-width: 200px; height: fit-content;
    max-height: calc(100vh - 100px); overflow-y: auto;
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 16px;
}
.minimap-title { font-size: 0.75rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 12px; }
.minimap-node {
    font-size: 0.75rem; padding: 4px 8px; border-radius: 4px;
    color: var(--text-muted); cursor: pointer; transition: all var(--transition);
    margin-bottom: 2px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.minimap-node:hover { background: var(--bg-hover); color: var(--text-primary); }
.minimap-node.completed { color: var(--cat-fundamentals); text-decoration: line-through; opacity: 0.6; }
.minimap-node.active { background: var(--accent); color: #fff; }

/* === Roadmap Nodes === */
.roadmap-nodes { flex: 1; max-width: 100%; }
.node {
    background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
    margin-bottom: 12px; transition: all var(--transition); position: relative;
    border-left: 3px solid var(--cat-fundamentals);
}
.node[data-category="intermediate"] { border-left-color: var(--cat-intermediate); }
.node[data-category="advanced"] { border-left-color: var(--cat-advanced); }
.node[data-category="tools"] { border-left-color: var(--cat-tools); }
.node:hover { border-color: var(--border-hover); box-shadow: var(--shadow); }
.node.completed { opacity: 0.7; }
.node.completed .node-title { text-decoration: line-through; }
.node.completed::after {
    content: '✓'; position: absolute; top: 12px; right: 12px;
    color: #4caf50; font-weight: 700; font-size: 1.2rem;
}

.node-header {
    padding: 16px 20px; cursor: pointer; display: flex; align-items: center;
    gap: 12px; user-select: none;
}
.node-icon { font-size: 1.3rem; flex-shrink: 0; }
.node-title { font-weight: 600; font-size: 1rem; flex: 1; }
.node-badge {
    font-size: 0.7rem; padding: 2px 8px; border-radius: 50px;
    font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em;
}
.badge-fundamentals { background: rgba(124,92,252,0.15); color: var(--cat-fundamentals); }
.badge-intermediate { background: rgba(0,212,255,0.15); color: var(--cat-intermediate); }
.badge-advanced { background: rgba(255,107,157,0.15); color: var(--cat-advanced); }
.badge-tools { background: rgba(255,193,7,0.15); color: var(--cat-tools); }

.node-body {
    max-height: 0; overflow: hidden; transition: max-height 0.4s ease;
}
.node.expanded .node-body { max-height: 600px; }
.node-expand-icon { color: var(--text-muted); transition: transform var(--transition); font-size: 0.8rem; }
.node.expanded .node-expand-icon { transform: rotate(90deg); }

.node-content { padding: 0 20px 20px; }
.node-desc { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 16px; }
.node-resources { display: flex; flex-direction: column; gap: 8px; }
.resource-link {
    display: flex; align-items: center; gap: 8px;
    padding: 8px 12px; border-radius: var(--radius-sm);
    background: var(--bg-secondary); border: 1px solid var(--border);
    font-size: 0.85rem; color: var(--text-secondary); transition: all var(--transition);
    text-decoration: none;
}
.resource-link:hover { background: var(--bg-hover); color: var(--accent); border-color: var(--border-hover); }
.resource-type { font-size: 0.75rem; }

/* === Connection Lines === */
.node-connector {
    width: 3px; height: 12px; margin-left: 32px;
    background: var(--border); border-radius: 2px;
}

/* === Animations === */
[data-animate] {
    opacity: 0; transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
[data-animate].visible { opacity: 1; transform: translateY(0); }

/* === Print === */
@media print {
    .navbar, .back-to-top, .theme-toggle, .roadmap-controls, .minimap, #particles, .action-buttons, .hamburger { display: none !important; }
    body { background: #fff; color: #000; }
    .roadmap-header { position: static; background: #fff; }
    .node { break-inside: avoid; border: 1px solid #ddd; background: #fff; }
    .node.expanded .node-body { max-height: none; }
    .roadmap-layout { display: block; }
    .section { padding: 32px 0; }
}

/* === Responsive === */
@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    .nav-links { display: none; position: absolute; top: var(--navbar-height); left: 0; right: 0;
        background: var(--bg-glass); backdrop-filter: blur(20px); flex-direction: column;
        padding: 16px 24px; border-bottom: 1px solid var(--border); gap: 12px; }
    .nav-links.open { display: flex; }
    .hamburger { display: flex; }
    .hero { padding: 100px 16px 60px; min-height: auto; }
    .hero-stats { gap: 20px; }
    .stat-number { font-size: 1.5rem; }
    .roadmap-layout { flex-direction: column; }
    .minimap { display: none; }
    .roadmap-controls { flex-direction: column; }
    .filter-buttons { overflow-x: auto; flex-wrap: nowrap; }
    .section { padding: 48px 0; }
    .container { padding: 0 16px; }
}

@media (max-width: 480px) {
    h1 { font-size: 1.75rem; }
    .hero-buttons { flex-direction: column; align-items: center; }
    .roadmaps-grid { grid-template-columns: 1fr; }
    .features-grid { grid-template-columns: 1fr; }
    .testimonials-grid { grid-template-columns: 1fr; }
}

/* === Nav Badges === */
.nav-badge {
    background: var(--glass);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    cursor: pointer;
    color: var(--text);
    border: 1px solid var(--border);
    backdrop-filter: blur(10px);
    white-space: nowrap;
}
.nav-badge:hover { background: var(--accent); color: #fff; }

/* === Bookmark Panel === */
.bookmark-panel {
    position: fixed;
    top: 70px;
    right: -400px;
    width: 380px;
    max-height: 80vh;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: var(--shadow);
    z-index: 1000;
    overflow-y: auto;
    transition: right 0.3s ease;
    padding: 20px;
}
.bookmark-panel.open { right: 20px; }
.bookmark-panel-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.bookmark-panel-header h3 { margin: 0; }
.bookmark-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px;
    border-bottom: 1px solid var(--border);
}
.bookmark-item:last-child { border-bottom: none; }

/* === Bookmark Button on Nodes === */
.bookmark-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.1rem;
    padding: 2px 6px;
    border-radius: 6px;
    transition: transform 0.2s;
}
.bookmark-btn:hover { transform: scale(1.3); }

/* === Achievement Cards === */
.achievement-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    text-align: center;
    opacity: 0.5;
    filter: grayscale(1);
    transition: all 0.3s;
}
.achievement-card.unlocked {
    opacity: 1;
    filter: none;
    border-color: var(--accent);
    box-shadow: 0 0 20px rgba(124,92,252,0.15);
}
.achievement-icon { font-size: 2rem; display: block; margin-bottom: 8px; }
.achievement-badge {
    display: inline-block;
    margin-top: 8px;
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 0.75rem;
    background: var(--accent);
    color: #fff;
}
.achievement-badge.locked {
    background: var(--glass);
    color: var(--text-muted);
}

/* === Timer Display === */
#timerDisplay {
    font-family: monospace;
    font-size: 1.1rem;
    font-weight: bold;
}

/* === Learning Path Cards === */
.learning-path-card { cursor: default; }
.learning-path-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }

@media (max-width: 768px) {
    .bookmark-panel { width: 300px; right: -320px; }
    .bookmark-panel.open { right: 10px; }
    .nav-badge { font-size: 0.75rem; padding: 4px 8px; }
}

/* === Theme Transition === */
html { transition: background-color 0.3s ease, color 0.3s ease; }
body, .navbar, .hero, .section, .node, .feature-card, .roadmap-card, .faq-item, .testimonial-card, .newsletter-card, .cta-card, footer { transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease; }

/* === Resource Rating Stars === */
.resource-rating { color: #ffc107; font-size: 12px; margin-left: auto; white-space: nowrap; letter-spacing: 1px; }
.resource-link { align-items: center; gap: 6px; }
.resource-link[data-type] { display: flex; }

/* === Community Tips Section === */
.community-tips-section { margin-top: 16px; padding: 16px; border-radius: var(--radius-sm); background: var(--bg-tertiary); border: 1px solid var(--border); }
.tips-title { margin: 0 0 12px; font-size: 14px; }
.tips-count { color: var(--text-muted); font-weight: 400; }
.tip-item { padding: 8px 0; border-bottom: 1px solid var(--border); font-size: 13px; }
.tip-item:last-of-type { border-bottom: none; }
.tip-date { font-size: 11px; color: var(--text-muted); }
.tip-form { display: flex; gap: 8px; margin-top: 12px; }
.tip-input { flex: 1; padding: 8px 12px; border-radius: var(--radius-sm); border: 1px solid var(--border); background: var(--bg-card); color: var(--text-primary); font-size: 13px; outline: none; }
.tip-input:focus { border-color: var(--accent); }

/* === Learner Count === */
.learner-count-display { opacity: 0.8; }

/* === Certifications === */
.cert-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 20px; margin-top: 20px; }
.cert-card { background: rgba(255,255,255,0.06); border-radius: 16px; padding: 24px; backdrop-filter: blur(10px); transition: transform 0.2s; }
.cert-card:hover { transform: translateY(-2px); }
.cert-card.tracking { box-shadow: 0 0 20px rgba(108,99,255,0.15); }
.cert-header { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.cert-icon { font-size: 2rem; }
.cert-header h3 { font-size: 1rem; margin: 0; color: #e2e8f0; }
.cert-provider { font-size: 0.75rem; color: #94a3b8; }
.cert-bar { height: 8px; background: rgba(255,255,255,0.1); border-radius: 4px; overflow: hidden; margin-bottom: 8px; }
.cert-bar-fill { height: 100%; border-radius: 4px; transition: width 0.5s; }
.cert-stats { display: flex; justify-content: space-between; font-size: 0.8rem; color: #94a3b8; margin-bottom: 12px; }
.cert-topics { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 16px; }
.cert-topic { background: rgba(108,99,255,0.15); color: #a78bfa; padding: 2px 10px; border-radius: 12px; font-size: 0.75rem; }
.cert-btn { border: none; color: white; padding: 8px 16px; border-radius: 8px; cursor: pointer; font-size: 0.85rem; width: 100%; }
.cert-btn:hover { opacity: 0.9; }

/* === Community Forum === */
.forum-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; flex-wrap: wrap; gap: 10px; }
.forum-filters { display: flex; gap: 8px; flex-wrap: wrap; }
.forum-filter { background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.1); color: #94a3b8; padding: 6px 14px; border-radius: 20px; cursor: pointer; font-size: 0.85rem; }
.forum-filter.active { background: rgba(108,99,255,0.2); border-color: #6c63ff; color: #a78bfa; }
.forum-new-post { background: #6c63ff; border: none; color: white; padding: 8px 16px; border-radius: 8px; cursor: pointer; }
.new-post-form { background: rgba(255,255,255,0.06); border-radius: 12px; padding: 20px; margin-bottom: 20px; }
.new-post-form select, .new-post-form input, .new-post-form textarea { width: 100%; background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.15); color: #e2e8f0; padding: 10px; border-radius: 8px; margin-bottom: 10px; font-size: 0.9rem; box-sizing: border-box; }
.new-post-form textarea { resize: vertical; min-height: 80px; }
.form-actions { display: flex; gap: 10px; }
.form-actions button { padding: 8px 20px; border: none; border-radius: 8px; cursor: pointer; font-size: 0.9rem; }
.form-actions button:first-child { background: #6c63ff; color: white; }
.form-actions button:last-child { background: rgba(255,255,255,0.1); color: #94a3b8; }
.forum-posts { display: flex; flex-direction: column; gap: 12px; }
.forum-post { display: flex; gap: 14px; background: rgba(255,255,255,0.04); border-radius: 12px; padding: 18px; transition: background 0.2s; }
.forum-post:hover { background: rgba(255,255,255,0.07); }
.post-avatar img { width: 44px; height: 44px; border-radius: 50%; background: rgba(108,99,255,0.2); }
.post-content { flex: 1; min-width: 0; }
.post-meta { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; flex-wrap: wrap; }
.post-category-tag { background: rgba(108,99,255,0.15); color: #a78bfa; padding: 2px 8px; border-radius: 10px; font-size: 0.7rem; }
.post-author-name { color: #6c63ff; font-size: 0.85rem; font-weight: 600; }
.post-time { color: #64748b; font-size: 0.75rem; }
.post-title { font-size: 1rem; margin: 0 0 6px 0; color: #e2e8f0; }
.post-message { color: #94a3b8; font-size: 0.9rem; line-height: 1.5; margin: 0 0 10px 0; }
.post-actions { display: flex; gap: 16px; }
.post-actions button { background: none; border: none; color: #94a3b8; cursor: pointer; font-size: 0.85rem; padding: 2px 8px; border-radius: 6px; }
.post-actions button:hover { background: rgba(255,255,255,0.06); }
.post-actions span { color: #94a3b8; font-size: 0.85rem; }
.forum-note { text-align: center; color: #64748b; font-size: 0.85rem; margin-top: 20px; font-style: italic; }