/* ============================================
   PDFNet Project Page - Bright Premium Design
   Modern Academic Project Page Style
   ============================================ */

/* CSS Variables - Bright Theme with Warm Accents */
:root {
    --primary: #0ea5e9;
    --primary-dark: #0284c7;
    --primary-light: #38bdf8;
    --secondary: #f59e0b;
    --secondary-dark: #d97706;
    --secondary-light: #fbbf24;
    --accent: #10b981;
    --accent-dark: #059669;
    --accent-light: #34d399;
    --purple: #8b5cf6;
    --purple-dark: #7c3aed;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-card: #ffffff;
    --bg-card-hover: #f8fafc;
    --bg-gradient: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 50%, #f0fdf4 100%);
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    --border-color: #e2e8f0;
    --border-light: #f1f5f9;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --glow-primary: rgba(14, 165, 233, 0.15);
    --glow-secondary: rgba(245, 158, 11, 0.15);
    --glow-accent: rgba(16, 185, 129, 0.15);
    
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --transition-fast: 0.2s ease;
    --transition-medium: 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: 1.7;
    overflow-x: hidden;
}

/* Selection */
::selection {
    background: var(--primary);
    color: white;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-light);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

/* Container */
.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(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition-medium);
}

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

.nav-logo {
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
    letter-spacing: -0.5px;
}

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

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transition: var(--transition-fast);
}

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

.nav-links a:hover::after {
    width: 100%;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 120px 24px 80px;
    position: relative;
    background: var(--bg-gradient);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at 20% 20%, var(--glow-primary) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, var(--glow-secondary) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, var(--glow-accent) 0%, transparent 60%);
    pointer-events: none;
    animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 0.9; }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 950px;
}

/* Badges */
.badge-container {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.badge {
    padding: 8px 16px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    animation: fadeInUp 0.6s ease backwards;
}

.badge-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    animation-delay: 0.1s;
}

.badge-secondary {
    background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-dark) 100%);
    color: white;
    animation-delay: 0.2s;
}

.badge-accent {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    color: white;
    animation-delay: 0.3s;
}

.badge-cvpr {
    background: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%);
    color: white;
    animation-delay: 0s;
    font-weight: 700;
    box-shadow: 0 2px 8px rgba(220, 38, 38, 0.3);
}

/* Title */
.title {
    font-size: clamp(2rem, 5vw, 3.2rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    letter-spacing: -1px;
    animation: fadeInUp 0.6s ease 0.2s backwards;
    color: var(--text-primary);
}

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

/* Authors */
.authors {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 8px 16px;
    margin-bottom: 16px;
    animation: fadeInUp 0.6s ease 0.3s backwards;
}

.author {
    font-size: 1rem;
    color: var(--text-primary);
    font-weight: 500;
}

.separator {
    color: var(--text-muted);
}

.institution {
    margin-bottom: 32px;
    animation: fadeInUp 0.6s ease 0.4s backwards;
}

.inst-name {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
}

/* Buttons */
.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    animation: fadeInUp 0.6s ease 0.5s backwards;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: 12px;
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-medium);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    box-shadow: var(--shadow-md), 0 0 20px var(--glow-primary);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), 0 0 30px var(--glow-primary);
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

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

.btn-accent {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    color: white;
    box-shadow: var(--shadow-md), 0 0 20px var(--glow-accent);
}

.btn-accent:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), 0 0 30px var(--glow-accent);
}

/* Floating Cards */
.hero-visual {
    position: absolute;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.floating-card {
    position: absolute;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-primary);
    box-shadow: var(--shadow-lg);
    animation: float 6s ease-in-out infinite;
}

.floating-card i {
    font-size: 1.2rem;
    color: var(--primary);
}

.card-1 {
    top: 25%;
    left: 5%;
    animation-delay: 0s;
}

.card-2 {
    top: 40%;
    right: 5%;
    animation-delay: 1s;
}

.card-3 {
    bottom: 25%;
    left: 10%;
    animation-delay: 2s;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   TL;DR Section
   ============================================ */
.tldr-section {
    padding: 80px 0;
    background: var(--bg-secondary);
    position: relative;
}

.tldr-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 40px;
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.tldr-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
}

.tldr-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    font-size: 1.5rem;
    color: white;
}

.tldr-card h2 {
    font-size: 1.5rem;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.tldr-card p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

.tldr-card strong {
    color: var(--primary);
}

/* ============================================
   Section Titles
   ============================================ */
.section-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 16px;
    color: var(--text-primary);
}

.section-number {
    font-size: 0.875rem;
    font-weight: 600;
    color: white;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    padding: 8px 12px;
    border-radius: 8px;
    font-family: monospace;
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 40px;
}

/* ============================================
   Abstract Section
   ============================================ */
.abstract-section {
    padding: 100px 0;
    background: var(--bg-primary);
}

.abstract-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 40px;
    box-shadow: var(--shadow-md);
}

.abstract-content p {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.9;
}

.abstract-content p:last-child {
    margin-bottom: 0;
}

.abstract-content strong {
    color: var(--primary);
}

/* ============================================
   Figure Section
   ============================================ */
.figure-section {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.figure-container {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 40px;
    box-shadow: var(--shadow-lg);
    text-align: center;
}

.figure-container img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

.figure-caption {
    margin-top: 20px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-style: italic;
}

/* ============================================
   Insight Section
   ============================================ */
.insight-section {
    padding: 100px 0;
    background: var(--bg-primary);
}

.insight-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 24px;
    align-items: center;
    margin-top: 40px;
}

.insight-card {
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: 20px;
    padding: 32px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition-medium);
}

.insight-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.insight-problem {
    border-color: #fecaca;
    background: linear-gradient(135deg, #fef2f2 0%, #fee2e2 100%);
}

.insight-problem .insight-header i {
    color: #dc2626;
}

.insight-solution {
    border-color: #bbf7d0;
    background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%);
}

.insight-solution .insight-header i {
    color: var(--accent);
}

.insight-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 16px;
}

.insight-header i {
    font-size: 1.5rem;
}

.insight-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.insight-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

.insight-card strong {
    color: var(--text-primary);
}

.insight-arrow {
    color: var(--primary);
    font-size: 2rem;
}

/* ============================================
   Method Section
   ============================================ */
.method-section {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.method-block {
    display: flex;
    gap: 32px;
    margin-bottom: 40px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 40px;
    transition: var(--transition-medium);
    box-shadow: var(--shadow-md);
}

.method-block:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-lg), 0 0 20px var(--glow-primary);
}

.method-icon {
    width: 80px;
    height: 80px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    flex-shrink: 0;
}

.tad-icon {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
}

.lpd-icon {
    background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-dark) 100%);
    color: white;
}

.patch-icon {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    color: white;
}

.method-content h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.method-content p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.8;
}

.method-features {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.feature {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    background: var(--bg-secondary);
    padding: 8px 16px;
    border-radius: 50px;
}

.feature i {
    color: var(--accent);
}

/* Pipeline Visual */
.pipeline-visual {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 40px;
    text-align: center;
    box-shadow: var(--shadow-md);
}

.pipeline-visual h3 {
    font-size: 1.3rem;
    margin-bottom: 32px;
    color: var(--text-primary);
}

.pipeline-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.pipeline-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 24px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    min-width: 120px;
}

.pipeline-step.highlight-step {
    border-color: var(--primary);
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.05) 0%, rgba(245, 158, 11, 0.05) 100%);
}

.step-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: white;
}

.pipeline-step span {
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-primary);
}

.pipeline-step small {
    color: var(--text-muted);
    font-size: 0.75rem;
}

.pipeline-arrow {
    color: var(--text-muted);
    font-size: 1.2rem;
}

/* ============================================
   Results Section
   ============================================ */
.results-section {
    padding: 100px 0;
    background: var(--bg-primary);
}

.results-table-container {
    overflow-x: auto;
    margin-bottom: 48px;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
}

.results-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-card);
    border-radius: 16px;
    overflow: hidden;
}

.results-table th,
.results-table td {
    padding: 18px 24px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.results-table th {
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.1) 0%, rgba(245, 158, 11, 0.1) 100%);
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-primary);
}

.results-table td {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.results-table tbody tr {
    transition: var(--transition-fast);
}

.results-table tbody tr:hover {
    background: var(--bg-secondary);
}

.highlight-row {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.05) 0%, rgba(14, 165, 233, 0.05) 100%) !important;
}

.sota {
    color: var(--accent);
    font-weight: 700;
}

/* Results Highlights */
.results-highlights {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.highlight-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 32px;
    text-align: center;
    transition: var(--transition-medium);
    box-shadow: var(--shadow-md);
}

.highlight-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg), 0 0 20px var(--glow-primary);
}

.highlight-number {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.highlight-label {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
}

.highlight-sub {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-top: 4px;
}

/* ============================================
   Visual Results Section
   ============================================ */
.visual-section {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.visual-grid {
    display: grid;
    gap: 32px;
}

.visual-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 32px;
    box-shadow: var(--shadow-md);
}

.visual-card img {
    width: 100%;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
}

.visual-card h3 {
    color: var(--text-primary);
    font-size: 1.2rem;
    margin-top: 20px;
    margin-bottom: 12px;
}

.visual-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ============================================
   Code Section
   ============================================ */
.code-section {
    padding: 100px 0;
    background: var(--bg-primary);
}

.code-block {
    background: #1e293b;
    border: 1px solid #334155;
    border-radius: 16px;
    overflow: hidden;
    margin-bottom: 24px;
    box-shadow: var(--shadow-md);
}

.code-header {
    background: #334155;
    padding: 12px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #475569;
}

.code-title {
    font-weight: 600;
    font-size: 0.9rem;
    color: #e2e8f0;
}

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

.code-dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.code-dots span:first-child {
    background: #ef4444;
}

.code-dots span:nth-child(2) {
    background: #f59e0b;
}

.code-dots span:last-child {
    background: #10b981;
}

.code-block pre {
    padding: 24px;
    overflow-x: auto;
}

.code-block code {
    font-family: 'Monaco', 'Consolas', 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.8;
    color: #e2e8f0;
}

/* Resources Section */
.resources-section {
    margin-top: 40px;
    text-align: center;
}

.resources-section h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.resource-links {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.resource-link {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    font-size: 0.95rem;
    font-weight: 500;
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition-fast);
}

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

.resource-link i {
    font-size: 1.1rem;
    color: var(--primary);
}

/* ============================================
   Citation Section
   ============================================ */
.citation-section {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.citation-block {
    background: #1e293b;
    border-color: #334155;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    padding: 60px 0 30px;
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
    flex-wrap: wrap;
    gap: 24px;
}

.footer-brand h3 {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 8px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 8px;
}

.footer-bottom .fa-heart {
    color: #ef4444;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1024px) {
    .hero-visual {
        display: none;
    }
    
    .insight-grid {
        grid-template-columns: 1fr;
    }
    
    .insight-arrow {
        transform: rotate(90deg);
        margin: 16px 0;
    }
    
    .results-highlights {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero {
        padding: 100px 20px 60px;
    }
    
    .title {
        font-size: 1.75rem;
    }
    
    .authors {
        flex-direction: column;
        gap: 8px;
    }
    
    .separator {
        display: none;
    }
    
    .method-block {
        flex-direction: column;
        text-align: center;
    }
    
    .method-features {
        justify-content: center;
    }
    
    .pipeline-flow {
        flex-direction: column;
    }
    
    .pipeline-arrow {
        transform: rotate(90deg);
    }
    
    .section-title {
        flex-direction: column;
        text-align: center;
        gap: 12px;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}

/* ============================================
   Animations
   ============================================ */
@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.animate-on-scroll {
    opacity: 0;
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
}

/* Image Gallery */
.image-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-top: 32px;
}

.gallery-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-medium);
}

.gallery-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.gallery-item img {
    width: 100%;
    height: auto;
    display: block;
}

.gallery-item .caption {
    padding: 16px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-align: center;
}

/* Center image */
.center-image {
    max-width: 100%;
    margin: 0 auto;
    display: block;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
}

/* Method figure */
.method-figure {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 40px;
    margin-bottom: 40px;
    box-shadow: var(--shadow-lg);
}

.method-figure img {
    width: 100%;
    border-radius: 12px;
}

.method-figure .caption {
    text-align: center;
    margin-top: 20px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-style: italic;
}