/* ========================================
   D-PDLP Custom Theme - Vibrant & Modern
   ======================================== */

:root {
  /* Color Palette */
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --secondary: #06b6d4;
  --accent: #f59e0b;
  --success: #10b981;
  --warning: #f97316;
  --danger: #ef4444;
  
  /* Gradients */
  --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --gradient-4: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
  --gradient-5: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
  --gradient-hero: linear-gradient(135deg, #1e1b4b 0%, #312e81 50%, #1e1b4b 100%);
  --gradient-text: linear-gradient(135deg, #667eea 0%, #f093fb 50%, #f5576c 100%);
  
  /* Dark Theme */
  --bg-dark: #0f172a;
  --bg-dark-2: #1e293b;
  --bg-card: rgba(30, 41, 59, 0.8);
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  /* Spacing */
  --section-padding: 6rem 0;
  --card-radius: 20px;
  --btn-radius: 12px;
}

/* Base Styles */
.d-pdlp-theme {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Animated Background */
.animated-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  overflow: hidden;
  background: var(--bg-dark);
}

.gradient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
  animation: float 20s infinite ease-in-out;
}

.orb-1 {
  width: 600px;
  height: 600px;
  background: var(--gradient-1);
  top: -200px;
  right: -200px;
  animation-delay: 0s;
}

.orb-2 {
  width: 500px;
  height: 500px;
  background: var(--gradient-3);
  bottom: -150px;
  left: -150px;
  animation-delay: -5s;
}

.orb-3 {
  width: 400px;
  height: 400px;
  background: var(--gradient-2);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation-delay: -10s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -30px) scale(1.1); }
  66% { transform: translate(-20px, 20px) scale(0.9); }
}

/* Navigation */
.main-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding: 1rem 0;
}

.main-nav .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

.logo-text {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.75rem;
  font-weight: 700;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.logo-badge {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 0.25rem 0.75rem;
  background: rgba(99, 102, 241, 0.2);
  border: 1px solid var(--primary);
  border-radius: 20px;
  color: var(--primary-light);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: all 0.3s ease;
  font-size: 0.95rem;
}

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

.nav-link.github-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--btn-radius);
}

.nav-link.github-link:hover {
  background: rgba(255, 255, 255, 0.15);
}

/* Hero Section */
.hero-section {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 8rem 0 4rem;
  position: relative;
}

.hero-content {
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.25rem;
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.2), rgba(245, 158, 11, 0.1));
  border: 1px solid var(--accent);
  border-radius: 50px;
  color: var(--accent);
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 2rem;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(245, 158, 11, 0.4); }
  50% { box-shadow: 0 0 0 10px rgba(245, 158, 11, 0); }
}

.hero-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  line-height: 1;
}

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

.hero-subtitle {
  font-size: 1.75rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  font-weight: 500;
}

.hero-description {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto 2rem;
  line-height: 1.7;
}

.highlight {
  color: var(--primary-light);
  font-weight: 600;
}

/* Hero Stats */
.hero-stats {
  display: flex;
  justify-content: center;
  gap: 3rem;
  margin: 3rem 0;
  padding: 2rem;
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--card-radius);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

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

.stat-number {
  display: block;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2.5rem;
  font-weight: 700;
  background: var(--gradient-3);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

/* Buttons */
.hero-actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 3rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 2rem;
  border-radius: var(--btn-radius);
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
}

.btn-primary {
  background: var(--gradient-1);
  color: white;
  box-shadow: 0 10px 40px -10px rgba(99, 102, 241, 0.5);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 50px -10px rgba(99, 102, 241, 0.6);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.3);
}

.btn-large {
  padding: 1.25rem 2.5rem;
  font-size: 1.1rem;
}

/* Hero Authors */
.hero-authors {
  text-align: center;
}

.hero-authors p {
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.author-link {
  color: var(--primary-light);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s;
}

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

.affiliations {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Hero Visual */
.hero-visual {
  margin-top: 4rem;
  padding: 0 1.5rem;
}

.hero-image {
  width: 100%;
  max-width: 1000px;
  margin: 0 auto;
  display: block;
  border-radius: var(--card-radius);
  box-shadow: 0 50px 100px -20px rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Open Source Banner */
.opensource-banner {
  background: linear-gradient(90deg, #059669 0%, #10b981 50%, #059669 100%);
  padding: 2rem 0;
  position: relative;
  overflow: hidden;
}

.opensource-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.opensource-content {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  position: relative;
  z-index: 1;
}

.opensource-icon {
  font-size: 3rem;
  color: white;
}

.opensource-text h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.5rem;
  color: white;
  margin-bottom: 0.25rem;
}

.opensource-text p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.95rem;
}

.btn-github {
  background: white;
  color: #059669;
  font-weight: 600;
  padding: 0.875rem 1.5rem;
}

.btn-github:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.3);
}

/* Sections */
.section {
  padding: var(--section-padding);
}

.section-header {
  margin-bottom: 3rem;
}

.section-header.centered {
  text-align: center;
}

.section-tag {
  display: inline-block;
  padding: 0.375rem 1rem;
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: 20px;
  color: var(--primary-light);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
}

.section-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* Abstract Section */
.abstract-section {
  background: linear-gradient(180deg, rgba(99, 102, 241, 0.05) 0%, transparent 100%);
}

.abstract-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border-radius: var(--card-radius);
  padding: 3rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  max-width: 900px;
  margin: 0 auto;
}

.abstract-card p {
  color: #cbd5e1;
  font-size: 1.1rem;
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

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

.abstract-card .lead {
  font-size: 1.25rem;
  color: #f1f5f9;
  font-weight: 500;
}

.abstract-card strong {
  color: #f8fafc;
  font-weight: 600;
}

.abstract-card em {
  color: #a5b4fc;
  font-style: normal;
  font-weight: 500;
}

.accent-text {
  color: #a5b4fc;
  font-weight: 600;
}

.highlight-text {
  background: linear-gradient(120deg, rgba(99, 102, 241, 0.3) 0%, rgba(99, 102, 241, 0.1) 100%);
  padding: 0.125rem 0.5rem;
  border-radius: 6px;
  color: #c7d2fe;
  font-weight: 600;
}

/* Features Grid */
.features-section {
  background: linear-gradient(180deg, transparent 0%, rgba(6, 182, 212, 0.05) 50%, transparent 100%);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border-radius: var(--card-radius);
  padding: 2rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-1);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: 0 20px 40px -20px rgba(0, 0, 0, 0.5);
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-card.featured {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.15), rgba(99, 102, 241, 0.05));
  border-color: var(--primary);
}

.feature-card.featured::before {
  transform: scaleX(1);
}

.feature-icon {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  background: var(--gradient-1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: white;
  margin-bottom: 1.5rem;
}

.feature-icon.icon-blue { background: var(--gradient-3); }
.feature-icon.icon-purple { background: var(--gradient-2); }
.feature-icon.icon-green { background: var(--gradient-4); }
.feature-icon.icon-orange { background: linear-gradient(135deg, #f97316, #fb923c); }
.feature-icon.icon-red { background: linear-gradient(135deg, #ef4444, #f87171); }

.feature-card h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

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

.feature-badge {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  padding: 0.25rem 0.75rem;
  background: var(--accent);
  color: white;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  border-radius: 20px;
}

/* Architecture Section */
.architecture-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 2rem;
}

.arch-card {
  background: var(--bg-card);
  border-radius: var(--card-radius);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.arch-card img {
  width: 100%;
  height: auto;
  display: block;
}

.arch-content {
  padding: 2rem;
}

.arch-content h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

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

/* Performance Section */
.performance-section {
  background: linear-gradient(180deg, rgba(245, 158, 11, 0.05) 0%, transparent 100%);
}

/* Speedup Showcase */
.speedup-showcase {
  margin-bottom: 4rem;
}

.speedup-card {
  background: rgba(30, 41, 59, 0.9);
  border-radius: var(--card-radius);
  padding: 2.5rem;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.speedup-header {
  text-align: center;
  margin-bottom: 2rem;
}

.speedup-header h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.5rem;
  color: #f8fafc;
  margin-bottom: 0.5rem;
  font-weight: 700;
}

.speedup-header p {
  color: #94a3b8;
  font-size: 1rem;
}

.speedup-grid {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.speedup-item {
  display: grid;
  grid-template-columns: 120px 100px 1fr 100px;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.speedup-name {
  font-weight: 700;
  color: #f1f5f9;
  font-size: 1rem;
}

.speedup-dims {
  font-size: 0.85rem;
  color: #94a3b8;
  font-weight: 500;
}

.speedup-bar {
  height: 28px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 6px;
  overflow: hidden;
  position: relative;
}

.bar-single {
  height: 100%;
  background: linear-gradient(90deg, #64748b, #94a3b8);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: 0.75rem;
  color: #0f172a;
  font-size: 0.85rem;
  font-weight: 700;
  border-radius: 6px;
  min-width: 50px;
  text-shadow: none;
}

.bar-multi {
  height: 100%;
  background: linear-gradient(90deg, #059669, #10b981);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: 0.75rem;
  color: #ffffff;
  font-size: 0.85rem;
  font-weight: 700;
  border-radius: 6px;
  min-width: 50px;
  text-shadow: 0 1px 2px rgba(0,0,0,0.3);
}

.speedup-factor {
  font-weight: 700;
  color: #34d399;
  text-align: right;
  font-size: 0.95rem;
  text-shadow: 0 0 10px rgba(52, 211, 153, 0.3);
}

.speedup-legend {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-top: 1.5rem;
  color: #e2e8f0;
  font-size: 0.95rem;
  font-weight: 500;
}

.legend-dot {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 3px;
  margin-right: 0.5rem;
}

.legend-dot.single { background: linear-gradient(90deg, #475569, #64748b); }
.legend-dot.multi { background: var(--gradient-4); }

/* Comparison Table */
.comparison-section {
  background: rgba(30, 41, 59, 0.9);
  border-radius: var(--card-radius);
  padding: 2.5rem;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.comparison-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.75rem;
  color: #f8fafc;
  text-align: center;
  margin-bottom: 1.5rem;
  font-weight: 700;
}

.comparison-title i {
  color: #22d3ee;
  margin-right: 0.5rem;
}

.table-wrapper {
  overflow-x: auto;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.comparison-table th {
  background: rgba(99, 102, 241, 0.2);
  color: #a5b4fc;
  font-weight: 700;
  padding: 1rem;
  text-align: left;
  border-bottom: 2px solid rgba(99, 102, 241, 0.3);
}

.comparison-table th.text-center {
  text-align: center;
}

.comparison-table th.text-right {
  text-align: right;
}

.comparison-table .subheader th {
  background: rgba(99, 102, 241, 0.1);
  font-size: 0.85rem;
  padding: 0.75rem 1rem;
  color: #c7d2fe;
}

..comparison-table td {
  padding: 0.875rem 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  color: #e2e8f0;
}

.comparison-table td strong {
  color: #f8fafc;
  font-weight: 700;
}

.comparison-table td.text-right {
  text-align: right;
}

.comparison-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

.comparison-table .best {
  color: #34d399;
  font-weight: 700;
  background: rgba(16, 185, 129, 0.1);
  border-radius: 4px;
}

.row-tag {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  background: rgba(99, 102, 241, 0.2);
  border-radius: 4px;
  font-size: 0.75rem;
  color: #a5b4fc;
  margin-left: 0.5rem;
  font-weight: 500;
}

.speedup-tag {
  display: inline-block;
  padding: 0.125rem 0.375rem;
  background: var(--success);
  color: white;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 700;
  margin-left: 0.5rem;
}

.highlight-row {
  background: rgba(245, 158, 11, 0.1);
}

.highlight-row td {
  color: #fbbf24;
}

.summary-row {
  background: rgba(99, 102, 241, 0.2);
  font-weight: 700;
}

.summary-row td {
  color: #e0e7ff;
  border-top: 2px solid rgba(99, 102, 241, 0.4);
}

.comparison-note {
  margin-top: 1.5rem;
  padding: 1.25rem 1.5rem;
  background: rgba(6, 182, 212, 0.15);
  border-left: 4px solid #22d3ee;
  border-radius: 0 8px 8px 0;
  color: #e2e8f0;
  font-size: 1rem;
  line-height: 1.6;
}

.comparison-note i {
  color: #22d3ee;
  margin-right: 0.5rem;
}

/* Benchmarks Cloud */
.benchmarks-section {
  background: linear-gradient(180deg, transparent 0%, rgba(139, 92, 246, 0.05) 100%);
}

.benchmarks-cloud {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  max-width: 800px;
  margin: 0 auto;
}

.benchmark-tag {
  padding: 0.75rem 1.5rem;
  background: rgba(99, 102, 241, 0.15);
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: 50px;
  color: #c7d2fe;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.3s ease;
}

.benchmark-tag:hover {
  background: rgba(99, 102, 241, 0.25);
  border-color: #818cf8;
  color: #e0e7ff;
  transform: translateY(-2px);
}

.benchmark-tag.size-lg {
  font-size: 1.1rem;
  padding: 1rem 2rem;
  background: rgba(99, 102, 241, 0.2);
  color: #e0e7ff;
  font-weight: 600;
}

/* CTA Section */
.cta-section {
  padding: 4rem 0;
}

.cta-card {
  background: var(--gradient-1);
  border-radius: var(--card-radius);
  padding: 4rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-card::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 60%);
  animation: rotate 20s linear infinite;
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.cta-card h2 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2.5rem;
  color: white;
  margin-bottom: 1rem;
  position: relative;
  z-index: 1;
}

.cta-card p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto 2rem;
  position: relative;
  z-index: 1;
}

.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 1rem;
  position: relative;
  z-index: 1;
}

.cta-buttons .btn-primary {
  background: white;
  color: var(--primary-dark);
}

.cta-buttons .btn-secondary {
  background: rgba(255, 255, 255, 0.2);
  color: white;
  border-color: rgba(255, 255, 255, 0.3);
}

.cta-buttons .btn-secondary:hover {
  background: rgba(255, 255, 255, 0.3);
}

/* BibTeX Section */
.bibtex-section {
  background: linear-gradient(180deg, rgba(15, 23, 42, 1) 0%, rgba(30, 41, 59, 1) 100%);
}

.bibtex-card {
  background: #1e293b;
  border-radius: var(--card-radius);
  padding: 2rem;
  border: 1px solid rgba(255, 255, 255, 0.15);
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.bibtex-card pre {
  background: transparent !important;
  border: none !important;
  padding: 0 !important;
  margin: 0 !important;
  overflow-x: auto;
  box-shadow: none !important;
}

.bibtex-card code {
  font-family: 'SF Mono', 'Monaco', 'Consolas', monospace !important;
  font-size: 0.95rem !important;
  color: #f1f5f9 !important;
  line-height: 1.7 !important;
  background: transparent !important;
}

.copy-btn {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  padding: 0.5rem 1rem;
  background: rgba(99, 102, 241, 0.2);
  border: 1px solid var(--primary);
  border-radius: 8px;
  color: var(--primary-light);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
}

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

/* Footer */
.main-footer {
  background: var(--bg-dark-2);
  padding: 3rem 0 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.footer-logo {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 0.25rem;
}

.footer-links {
  display: flex;
  gap: 1rem;
}

.footer-links a {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 1.25rem;
  transition: all 0.3s;
}

.footer-links a:hover {
  background: var(--primary);
  color: white;
  transform: translateY(-3px);
}

.footer-bottom {
  text-align: center;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

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

.footer-bottom a {
  color: var(--primary-light);
  text-decoration: none;
}

/* Scroll to Top */
.scroll-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--gradient-1);
  border: none;
  color: white;
  font-size: 1.25rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s;
  z-index: 999;
  box-shadow: 0 10px 30px -10px rgba(99, 102, 241, 0.5);
}

.scroll-top.visible {
  opacity: 1;
  visibility: visible;
}

.scroll-top:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 40px -10px rgba(99, 102, 241, 0.6);
}

/* Responsive */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 4rem;
  }
  
  .hero-stats {
    gap: 2rem;
  }
  
  .speedup-item {
    grid-template-columns: 100px 80px 1fr 80px;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .hero-title {
    font-size: 3rem;
  }
  
  .hero-subtitle {
    font-size: 1.25rem;
  }
  
  .hero-stats {
    flex-direction: column;
    gap: 1.5rem;
  }
  
  .hero-actions {
    flex-direction: column;
  }
  
  .opensource-content {
    flex-direction: column;
    text-align: center;
  }
  
  .architecture-grid {
    grid-template-columns: 1fr;
  }
  
  .speedup-item {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }
  
  .speedup-bar {
    order: 3;
  }
  
  .speedup-factor {
    order: 4;
    text-align: left;
  }
  
  .cta-card {
    padding: 2rem;
  }
  
  .cta-card h2 {
    font-size: 1.75rem;
  }
  
  .cta-buttons {
    flex-direction: column;
  }
  
  .footer-content {
    flex-direction: column;
    text-align: center;
    gap: 1.5rem;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2.5rem;
  }
  
  .section-title {
    font-size: 1.75rem;
  }
  
  .abstract-card {
    padding: 1.5rem;
  }
  
  .feature-card {
    padding: 1.5rem;
  }
}