/* ============================================
   EideticRAG Landing Page - Premium Design
   ============================================ */

/* CSS Variables - Dark Theme */
:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a25;
    --bg-card: rgba(26, 26, 37, 0.8);
    
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    
    --accent-primary: #8b5cf6;
    --accent-secondary: #06b6d4;
    --accent-gradient: linear-gradient(135deg, #8b5cf6 0%, #06b6d4 100%);
    
    --success: #10b981;
    --error: #ef4444;
    --warning: #f59e0b;
    
    --border-color: rgba(255, 255, 255, 0.1);
    --glow-color: rgba(139, 92, 246, 0.3);
    
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-main);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ============================================
   Navigation
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition-normal);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.25rem;
}

.logo-icon { font-size: 1.5rem; }

.logo-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition-fast);
}

.nav-links a:hover { color: var(--text-primary); }

.btn-github {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary) !important;
    transition: var(--transition-normal);
}

.btn-github:hover {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 20px var(--glow-color);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 100px 24px 60px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(139, 92, 246, 0.15), transparent),
        radial-gradient(ellipse 60% 40% at 80% 60%, rgba(6, 182, 212, 0.1), transparent);
    pointer-events: none;
}

.hero-particles {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.hero-content {
    text-align: center;
    max-width: 900px;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--success);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.gradient-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-normal);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 4px 20px var(--glow-color);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px var(--glow-color);
}

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

.btn-secondary:hover {
    background: var(--bg-secondary);
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

.btn-large {
    padding: 18px 36px;
    font-size: 1.1rem;
}

.hero-scroll-indicator {
    position: absolute;
    bottom: 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 0.8rem;
    animation: bounce 2s infinite;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid var(--text-muted);
    border-bottom: 2px solid var(--text-muted);
    transform: rotate(45deg);
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(10px); }
}

/* Animations */
.animate-fade-in { animation: fadeIn 0.8s ease forwards; opacity: 0; }
.animate-slide-up { animation: slideUp 0.8s ease forwards; opacity: 0; transform: translateY(30px); }
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.4s; }

@keyframes fadeIn { to { opacity: 1; } }
@keyframes slideUp { to { opacity: 1; transform: translateY(0); } }

/* ============================================
   Section Base Styles
   ============================================ */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(139, 92, 246, 0.1);
    border: 1px solid rgba(139, 92, 246, 0.3);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--accent-primary);
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.subsection-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--text-primary);
}

/* ============================================
   SECTION 1: BENEFITS
   ============================================ */
.benefits {
    background: var(--bg-secondary);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 80px;
}

.benefit-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px;
    transition: var(--transition-normal);
}

.benefit-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-5px);
    box-shadow: 0 10px 40px rgba(139, 92, 246, 0.1);
}

.benefit-card.highlight {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.1), rgba(6, 182, 212, 0.1));
    border-color: var(--accent-primary);
}

.benefit-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.benefit-card h3 {
    font-size: 1.2rem;
    margin-bottom: 12px;
}

.benefit-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Comparison Table */
.comparison-section {
    max-width: 800px;
    margin: 0 auto;
}

.comparison-title {
    text-align: center;
    font-size: 1.5rem;
    margin-bottom: 24px;
}

.comparison-table {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
}

.comparison-row {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    border-bottom: 1px solid var(--border-color);
}

.comparison-row:last-child { border-bottom: none; }

.comparison-row.header {
    background: var(--bg-tertiary);
    font-weight: 600;
}

.comparison-cell {
    padding: 16px 20px;
    display: flex;
    align-items: center;
}

.comparison-cell.featured {
    background: rgba(139, 92, 246, 0.1);
    color: var(--accent-primary);
    font-weight: 500;
}

.comparison-cell.good { color: var(--success); }
.comparison-cell.bad { color: var(--text-muted); }

/* ============================================
   SECTION 2: STATS FOR NERDS
   ============================================ */
.stats-for-nerds {
    background: var(--bg-primary);
}

.arch-section {
    margin-bottom: 80px;
}

.arch-diagram {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.arch-layer {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    transition: var(--transition-normal);
}

.arch-layer:hover {
    border-color: var(--accent-primary);
    box-shadow: 0 0 30px var(--glow-color);
}

.layer-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 12px;
    font-weight: 500;
}

.arch-nodes {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
}

.arch-node {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 12px 20px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: var(--transition-normal);
}

.arch-node:hover {
    transform: scale(1.05);
    border-color: var(--accent-primary);
}

.arch-node.featured {
    background: var(--accent-gradient);
    border: none;
}

.node-label {
    font-size: 0.9rem;
    font-weight: 500;
}

.node-detail {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.arch-arrow {
    text-align: center;
    font-size: 1.5rem;
    color: var(--accent-primary);
    animation: arrowPulse 1.5s infinite;
}

@keyframes arrowPulse {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

/* Tech Stack Section */
.tech-stack-section {
    margin-bottom: 80px;
}

.tech-categories {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.tech-category {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
}

.tech-category h4 {
    font-size: 1.1rem;
    margin-bottom: 16px;
    color: var(--accent-primary);
}

.tech-items {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.tech-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.tech-name {
    font-weight: 500;
    font-size: 0.95rem;
}

.tech-desc {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Metrics Section */
.metrics-section {
    margin-bottom: 80px;
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.metric-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
    text-align: center;
    transition: var(--transition-normal);
}

.metric-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-3px);
}

.metric-value {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.metric-label {
    display: block;
    font-size: 0.95rem;
    font-weight: 500;
    margin-bottom: 4px;
}

.metric-note {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Skills Cloud */
.skills-section .skills-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
}

.skill-tag {
    padding: 8px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

.skill-tag:hover {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: white;
    transform: translateY(-2px);
}

.skill-tag.hot {
    background: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.3);
    color: #ef4444;
}

.skill-tag.hot:hover {
    background: #ef4444;
    color: white;
}

/* Limitations Section */
.limitations-section {
    margin-top: 60px;
}

.limitations-box {
    background: rgba(245, 158, 11, 0.08);
    border: 1px solid rgba(245, 158, 11, 0.3);
    border-radius: 16px;
    padding: 24px;
}

.limitations-note {
    font-size: 0.9rem;
    color: var(--warning);
    margin-bottom: 16px;
    font-style: italic;
}

.limitations-list {
    list-style: none;
    padding: 0;
}

.limitations-list li {
    position: relative;
    padding-left: 24px;
    margin-bottom: 12px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

.limitations-list li::before {
    content: "⚠";
    position: absolute;
    left: 0;
    color: var(--warning);
}

.limitations-list li strong {
    color: var(--text-primary);
}

.arch-node.success {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.2), rgba(6, 182, 212, 0.2));
    border-color: var(--success);
}

/* Data Flow Diagrams */
.dataflow-section {
    margin-top: 80px;
}

.flow-diagram {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
    margin-bottom: 24px;
    overflow-x: auto;
}

.flow-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--accent-primary);
}

.flow-container {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: max-content;
    padding: 16px 0;
}

.flow-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    min-width: 120px;
    transition: var(--transition-normal);
}

.flow-step:hover {
    border-color: var(--accent-primary);
    transform: translateY(-3px);
    box-shadow: 0 4px 20px var(--glow-color);
}

.flow-step.highlight {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.2), rgba(6, 182, 212, 0.2));
    border-color: var(--accent-primary);
}

.flow-icon {
    font-size: 1.5rem;
}

.flow-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    text-align: center;
}

.flow-label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-primary);
}

.flow-data {
    font-size: 0.7rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    max-width: 100px;
    word-wrap: break-word;
}

.flow-arrow {
    font-size: 1.5rem;
    color: var(--accent-primary);
    flex-shrink: 0;
    animation: flowPulse 1.5s ease-in-out infinite;
}

@keyframes flowPulse {
    0%, 100% { opacity: 0.5; transform: translateX(0); }
    50% { opacity: 1; transform: translateX(3px); }
}

@media (max-width: 768px) {
    .flow-container {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .flow-arrow {
        transform: rotate(90deg);
    }
}

/* ============================================
   SECTION 3: INSTALLATION
   ============================================ */
.installation {
    background: var(--bg-secondary);
}

.prereq-box {
    max-width: 600px;
    margin: 0 auto 60px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
    text-align: center;
}

.prereq-box h3 {
    margin-bottom: 12px;
}

.prereq-box p {
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.prereq-grid {
    display: flex;
    gap: 16px;
    justify-content: center;
}

.prereq-item a {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 16px 24px;
    background: var(--bg-tertiary);
    border-radius: 12px;
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition-normal);
}

.prereq-item a:hover {
    background: var(--accent-primary);
    transform: translateY(-3px);
}

.prereq-icon {
    font-size: 1.5rem;
}

.prereq-name {
    font-size: 0.9rem;
    font-weight: 500;
}

.install-steps {
    max-width: 800px;
    margin: 0 auto 60px;
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.install-step {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
    transition: var(--transition-normal);
}

.install-step:hover {
    border-color: var(--accent-primary);
}

.step-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
}

.step-number {
    width: 40px;
    height: 40px;
    background: var(--accent-gradient);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    font-weight: 700;
    flex-shrink: 0;
}

.step-header h3 {
    flex: 1;
    font-size: 1.1rem;
}

.step-time {
    font-size: 0.8rem;
    color: var(--text-muted);
    padding: 4px 12px;
    background: var(--bg-tertiary);
    border-radius: 20px;
}

.step-content p {
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.step-note {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 12px;
    font-style: italic;
}

.step-note a {
    color: var(--accent-primary);
}

.code-block {
    position: relative;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
}

.code-block pre {
    padding: 16px;
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.6;
}

.code-block code {
    color: var(--text-secondary);
}

.copy-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    padding: 6px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-muted);
    font-size: 0.75rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

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

.system-requirements {
    max-width: 600px;
    margin: 0 auto;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
}

.system-requirements h3 {
    text-align: center;
    margin-bottom: 20px;
}

.system-requirements .req-grid {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.system-requirements .req-item {
    display: flex;
    justify-content: space-between;
    padding: 12px;
    background: var(--bg-tertiary);
    border-radius: 8px;
}

.system-requirements .req-label {
    font-weight: 500;
}

.system-requirements .req-value {
    color: var(--text-secondary);
}

/* ============================================
   SECTION 4: FINE-TUNING
   ============================================ */
.fine-tuning {
    background: var(--bg-primary);
}

.warning-box {
    max-width: 800px;
    margin: 0 auto 60px;
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.3);
    border-radius: 16px;
    padding: 24px;
}

.warning-box h3 {
    color: var(--warning);
    margin-bottom: 12px;
}

.warning-box ul {
    padding-left: 24px;
    color: var(--text-secondary);
}

.warning-box li {
    margin-bottom: 8px;
}

.warning-box strong {
    color: var(--text-primary);
}

.finetune-steps {
    max-width: 800px;
    margin: 0 auto 60px;
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.finetune-step {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
}

.finetune-step:hover {
    border-color: var(--accent-primary);
}

.step-list {
    padding-left: 24px;
    color: var(--text-secondary);
}

.step-list li {
    margin-bottom: 6px;
}

.colab-badge {
    display: inline-block;
    margin-top: 12px;
}

.colab-badge img {
    height: 32px;
    transition: var(--transition-normal);
}

.colab-badge:hover img {
    transform: scale(1.05);
}

.finetune-tips {
    max-width: 800px;
    margin: 0 auto;
}

.finetune-tips h3 {
    text-align: center;
    margin-bottom: 24px;
}

.tips-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.tip-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
}

.tip-card h4 {
    font-size: 1rem;
    margin-bottom: 8px;
    color: var(--accent-primary);
}

.tip-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* ============================================
   CTA Section
   ============================================ */
.cta {
    background: 
        linear-gradient(135deg, rgba(139, 92, 246, 0.1), rgba(6, 182, 212, 0.1)),
        var(--bg-secondary);
    text-align: center;
}

.cta-content h2 {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.cta-content p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 32px;
}

.cta-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: 60px 0;
}

.footer-content {
    text-align: center;
}

.footer-brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.footer-tagline {
    color: var(--text-muted);
    margin-bottom: 24px;
}

.footer-links {
    display: flex;
    gap: 32px;
    justify-content: center;
    margin-bottom: 24px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--accent-primary);
}

.footer-copy {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 0;
}

.footer-separator {
    width: 100px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-color), transparent);
    margin: 32px auto;
}

.footer-credit {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 400;
    letter-spacing: 0.3px;
}

.umbra-link {
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    position: relative;
    padding-bottom: 2px;
}

.umbra-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background: var(--accent-primary);
    transition: width 0.3s ease;
}

.umbra-link:hover {
    color: #fff;
    text-shadow: 0 0 10px var(--glow-color);
}

.umbra-link:hover::after {
    width: 100%;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1024px) {
    .benefits-grid { grid-template-columns: repeat(2, 1fr); }
    .metrics-grid { grid-template-columns: repeat(2, 1fr); }
    .tech-categories { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .mobile-menu-btn { display: block; }
    
    .hero-title { font-size: 2.5rem; }
    .hero-buttons { flex-direction: column; align-items: center; }
    
    .benefits-grid { grid-template-columns: 1fr; }
    .metrics-grid { grid-template-columns: 1fr; }
    .tips-grid { grid-template-columns: 1fr; }
    
    .comparison-row { grid-template-columns: 1fr; }
    .comparison-cell { border-bottom: 1px solid var(--border-color); }
    .comparison-cell:last-child { border-bottom: none; }
    
    .prereq-grid { flex-direction: column; }
    
    .cta-buttons { flex-direction: column; align-items: center; }
    .footer-links { flex-direction: column; gap: 12px; }
}