:root {
  --primary: #0d9488;
  --primary-light: #14b8a6;
  --primary-dark: #0f766e;
  --primary-50: #f0fdfa;
  --primary-100: #ccfbf1;
  --primary-200: #99f6e4;
  --accent: #06b6d4;
  --accent-light: #22d3ee;
  --secondary: #134e4a;
  --dark: #042f2e;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
  --white: #ffffff;
  --gradient-primary: linear-gradient(135deg, #0d9488 0%, #06b6d4 100%);
  --gradient-dark: linear-gradient(135deg, #042f2e 0%, #134e4a 100%);
  --gradient-hero: #4aa8b9;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --radius-sm: 0.375rem;
  --radius: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --font-heading: 'Merriweather', serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-ui: 'Nunito', sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--gray-50);
  color: var(--gray-800);
  line-height: 1.6;
  overflow-x: hidden;
}

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

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--gray-200);
  transition: all 0.3s ease;
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--primary-dark);
}

.nav-logo .logo-img {
  height: 36px;
  width: auto;
  border-radius: var(--radius-sm);
}

.nav-logo-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.nav-logo-text .nav-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary-dark);
  line-height: 1.2;
  font-family: var(--font-heading);
}

.nav-logo-text .nav-subtitle {
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--gray-500);
  line-height: 1.2;
  margin-top: 2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.nav-links a {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  text-decoration: none;
  color: var(--gray-600);
  font-size: 0.875rem;
  font-weight: 500;
  font-family: var(--font-ui);
  border-radius: var(--radius);
  transition: all 0.2s ease;
}

.nav-links a:hover {
  color: var(--primary);
  background: var(--primary-50);
}

.nav-links a i {
  font-size: 0.875rem;
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: #0f766e;
  color: white;
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all 0.3s ease;
  box-shadow: var(--shadow);
  font-family: var(--font-heading);
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  overflow: hidden;
  padding: 80px 24px 80px;
}

.hero-bg {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background-color: #0f766e;
  background-image: url('https://images.unsplash.com/photo-1516306580123-e6e52b1b7b5f?w=1920&q=80');
  background-position: left top;
  background-size: 125% auto;
  background-attachment: scroll;
  background-repeat: no-repeat;
  z-index: 0;
}

@media (min-width: 768px) {
  .hero-bg {
    background-attachment: fixed;
  }
}

@media (max-width: 767px) {
  .hero-bg {
    background-size: cover;
    background-position: center top;
  }
}

.hero-bg::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.63) 0%, rgba(30, 41, 59, 0.58) 100%);
}

.hero-bg::after {
  display: none;
}

.hero-particles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  overflow: hidden;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 900px;
  padding-top: 12vh;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  animation: slideUp 0.6s ease forwards;
  /* background: rgba(255, 255, 255, 0.38); */
  /* backdrop-filter: blur(10px); */
  /* -webkit-backdrop-filter: blur(10px); */
  /* border-radius: var(--radius-lg); */
  /* padding: 8px 16px; */
  margin-bottom: 32px;
  cursor: pointer;
  text-decoration: none;
}

.hero-badge .acm-logo {
  height: 100px;
  width: auto;
  display: block;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.hero-badge:hover .acm-logo {
  transform: scale(1.04);
  opacity: 0.95;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 700;
  color: white;
  line-height: 1.1;
  margin-bottom: 24px;
  text-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
  animation: fadeInUp 0.6s ease 0.1s both;
  font-family: var(--font-heading);
}

@media (min-width: 768px) {
  .hero h1 {
    font-size: 4rem;
  }
}

.hero-subtitle {
  font-size: 0.875rem;
  font-family: 'Comfortaa', sans-serif;
  color: rgba(255, 255, 255, 0.9);
  max-width: 700px;
  margin: 0 auto 40px;
  line-height: 1.7;
  animation: fadeInUp 0.6s ease 0.2s both;
}

@media (min-width: 768px) {
  .hero-subtitle {
    font-size: 1rem;
  }
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 60px;
  animation: fadeInUp 0.6s ease 0.3s both;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  font-size: 1rem;
  font-weight: 600;
  font-family: var(--font-ui);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all 0.3s ease;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: white;
  color: var(--primary-dark);
  box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-xl);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.15);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.3);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.25);
  transform: translateY(-3px);
}

.btn-large {
  padding: 18px 36px;
  font-size: 1.125rem;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
  animation: fadeInUp 0.6s ease 0.4s both;
}

.stat-item {
  display: flex;
  align-items: center;
  gap: 16px;
}

.stat-item i {
  font-size: 2rem;
  color: rgba(255, 255, 255, 0.9);
}

.stat-info {
  display: flex;
  flex-direction: column;
  text-align: left;
}

.stat-number {
  font-size: 1.25rem;
  font-weight: 700;
  color: white;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum";
  width: 5ch;
  display: inline-block;
  text-align: left;
  font-family: var(--font-heading);
}

.stat-label {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.8);
  margin-top: 4px;
  font-family: var(--font-heading);
}

.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
  animation: bounce 2s infinite;
}

.scroll-indicator i {
  font-size: 1.5rem;
  color: rgba(255, 255, 255, 0.6);
}

.section {
  padding: 100px 0;
}

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

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: var(--primary-50);
  color: var(--primary);
  font-size: 0.875rem;
  font-weight: 600;
  font-family: var(--font-ui);
  border-radius: 100px;
  margin-bottom: 16px;
}

.section-header h2 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 16px;
  font-family: var(--font-heading);
}

@media (min-width: 768px) {
  .section-header h2 {
    font-size: 2.5rem;
  }
}

.section-desc {
  font-size: 1.125rem;
  color: var(--gray-500);
  max-width: 600px;
  margin: 0 auto;
}

.overview-section {
  background: white;
}

.overview-grid {
  display: grid;
  gap: 40px;
}

.overview-main .card {
  background: var(--gradient-dark);
  color: white;
  padding: 48px;
  border-radius: var(--radius-xl);
  position: relative;
  overflow: hidden;
}

.overview-main .card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.2) 0%, transparent 70%);
  pointer-events: none;
}

.card-icon {
  width: 64px;
  height: 64px;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

.card-icon i {
  font-size: 1.75rem;
  color: white;
}

.overview-main .card h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 20px;
  font-family: var(--font-ui);
}

.overview-main .card p {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 16px;
}

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

.overview-main .card strong {
  color: var(--primary-200);
}

.overview-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 24px;
}

.feature-card {
  background: white;
  padding: 32px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  transition: all 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-200);
}

.feature-icon {
  width: 48px;
  height: 48px;
  background: var(--primary-50);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feature-icon i {
  font-size: 1.25rem;
  color: var(--primary);
}

.feature-card h4 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 12px;
}

.feature-card p {
  font-size: 0.9375rem;
  color: var(--gray-500);
  line-height: 1.6;
}

.dates-section {
  background: var(--gray-50);
}

.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 32px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--primary-200);
}

.timeline-item {
  display: flex;
  gap: 32px;
  margin-bottom: 40px;
  position: relative;
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-marker {
  width: 64px;
  height: 64px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: var(--shadow-lg);
  position: relative;
  z-index: 1;
}

.timeline-marker i {
  font-size: 1.5rem;
  color: white;
}

.timeline-content {
  flex: 1;
  background: white;
  padding: 28px 32px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  transition: all 0.3s ease;
}

.timeline-content:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--primary-200);
}

.timeline-date {
  display: inline-block;
  padding: 4px 12px;
  background: var(--primary-50);
  color: var(--primary);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  font-family: var(--font-ui);
}

.timeline-content h4 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 8px;
  font-family: var(--font-ui);
}

.timeline-content p {
  font-size: 0.9375rem;
  color: var(--gray-500);
}

.structure-section {
  background: white;
}

.tracks-overview {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-bottom: 64px;
}

@media (min-width: 900px) {
  .tracks-overview {
    grid-template-columns: repeat(3, 1fr);
  }
}

.track-card {
  background: var(--gray-50);
  border-radius: var(--radius-xl);
  padding: 32px;
  border: 1px solid var(--gray-200);
  transition: all 0.3s ease;
}

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

.track-number {
  display: inline-block;
  width: 48px;
  height: 48px;
  background: var(--gradient-primary);
  color: white;
  font-size: 1.5rem;
  font-weight: 700;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

.track-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 16px;
  font-family: var(--font-ui);
  line-height: 1.4;
}

.track-card p {
  font-size: 0.9375rem;
  color: var(--gray-600);
  line-height: 1.6;
  margin-bottom: 20px;
}

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

.track-details li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 12px;
  font-size: 0.875rem;
  color: var(--gray-700);
  line-height: 1.5;
}

.track-details li i {
  color: var(--primary);
  margin-top: 2px;
  flex-shrink: 0;
}

.phases-section {
  margin-bottom: 64px;
}

.phases-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 32px;
  font-family: var(--font-ui);
  display: flex;
  align-items: center;
  gap: 12px;
}

.phase-card {
  background: var(--gray-50);
  border-radius: var(--radius-xl);
  padding: 32px;
  border: 1px solid var(--gray-200);
  margin-bottom: 24px;
  transition: all 0.3s ease;
}

.phase-card:hover {
  box-shadow: var(--shadow-lg);
}

.phase-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--gradient-primary);
  color: white;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius);
  margin-bottom: 20px;
}

.phase-card h4 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 16px;
  font-family: var(--font-ui);
}

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

.phase-details li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 12px;
  font-size: 0.9375rem;
  color: var(--gray-700);
  line-height: 1.5;
}

.phase-details li i {
  color: var(--primary);
  margin-top: 2px;
  flex-shrink: 0;
}

.awards-section {
  background: linear-gradient(135deg, var(--primary-50) 0%, white 100%);
  border-radius: var(--radius-xl);
  padding: 40px;
  border: 1px solid var(--primary-200);
}

.awards-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 32px;
  font-family: var(--font-ui);
  display: flex;
  align-items: center;
  gap: 12px;
}

.awards-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 768px) {
  .awards-content {
    grid-template-columns: repeat(2, 1fr);
  }
}

.award-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 24px;
  background: white;
  border-radius: var(--radius-md);
  border: 1px solid var(--gray-200);
}

.award-item i {
  font-size: 2rem;
  color: var(--primary);
  margin-top: -4px;
  flex-shrink: 0;
}

.award-info h4 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 8px;
  font-family: var(--font-ui);
}

.award-info p {
  font-size: 0.9375rem;
  color: var(--gray-600);
  line-height: 1.6;
  margin: 0;
}

.structure-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

@media (min-width: 900px) {
  .structure-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.structure-card {
  background: var(--gray-50);
  border-radius: var(--radius-xl);
  padding: 40px;
  border: 1px solid var(--gray-200);
  transition: all 0.3s ease;
}

.structure-card:hover {
  box-shadow: var(--shadow-lg);
}

.structure-card.main-round {
  border-color: var(--primary-200);
  background: linear-gradient(135deg, var(--primary-50) 0%, white 100%);
}

.round-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--gradient-primary);
  color: white;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius);
  margin-bottom: 20px;
}

.structure-card h3 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 16px;
  font-family: var(--font-ui);
}

.round-desc {
  font-size: 1rem;
  color: var(--gray-600);
  line-height: 1.7;
  margin-bottom: 20px;
}

.round-goal {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  background: white;
  border-radius: var(--radius-md);
  border: 1px solid var(--gray-200);
  margin-bottom: 24px;
}

.round-goal i {
  font-size: 1.25rem;
  color: var(--primary);
}

.round-goal span {
  font-size: 0.9375rem;
  color: var(--gray-700);
  font-weight: 500;
}

.phases-container {
  display: grid;
  gap: 16px;
}

.phase-item {
  background: white;
  padding: 24px;
  border-radius: var(--radius-md);
  border: 1px solid var(--gray-200);
}

.phase-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.phase-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--gray-500);
}

.phase-status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 100px;
}

.phase-status.open {
  background: #dcfce7;
  color: #16a34a;
}

.phase-status.official {
  background: #fef3c7;
  color: #d97706;
}

.phase-item h4 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 8px;
}

.phase-item p {
  font-size: 0.875rem;
  color: var(--gray-500);
  line-height: 1.6;
}

.final-info {
  display: grid;
  gap: 12px;
}

.final-info .info-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  background: white;
  border-radius: var(--radius-md);
  border: 1px solid var(--gray-200);
}

.final-info .info-item i {
  font-size: 1.125rem;
  color: var(--primary);
}

.final-info .info-item span {
  font-size: 0.9375rem;
  color: var(--gray-600);
}

.dataset-section {
  background: var(--gray-50);
}

.dataset-overview {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 24px;
  margin-bottom: 48px;
}

.dataset-stat-card {
  background: white;
  padding: 32px;
  border-radius: var(--radius-lg);
  text-align: center;
  border: 1px solid var(--gray-200);
  transition: all 0.3s ease;
}

.dataset-stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-200);
}

.dataset-stat-card .stat-icon {
  width: 56px;
  height: 56px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}

.dataset-stat-card .stat-icon i {
  font-size: 1.5rem;
  color: white;
}

.dataset-stat-card .stat-value {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary-dark);
  line-height: 1;
  margin-bottom: 8px;
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum";
  font-family: var(--font-ui);
}

.dataset-stat-card .stat-name {
  font-size: 0.9375rem;
  color: var(--gray-500);
  font-weight: 500;
}

.dataset-table-container {
  background: white;
  border-radius: var(--radius-xl);
  padding: 32px;
  border: 1px solid var(--gray-200);
  margin-bottom: 48px;
  overflow-x: auto;
}

.dataset-table {
  width: 100%;
  border-collapse: collapse;
}

.dataset-table th,
.dataset-table td {
  padding: 16px 20px;
  text-align: left;
  border-bottom: 1px solid var(--gray-200);
}

.dataset-table th {
  background: var(--gray-50);
  font-weight: 600;
  color: var(--gray-700);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.dataset-table td {
  font-size: 0.9375rem;
  color: var(--gray-600);
}

.dataset-table td small {
  color: var(--gray-400);
  font-size: 0.8125rem;
}

.dataset-table .total-row {
  background: var(--primary-50);
}

.dataset-table .total-row td {
  font-weight: 600;
  color: var(--gray-900);
}

.split-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  font-weight: 600;
}

.split-badge.train {
  background: #dbeafe;
  color: #1d4ed8;
}

.split-badge.val {
  background: #fef3c7;
  color: #d97706;
}

.split-badge.test {
  background: #fce7f3;
  color: #db2777;
}

.dataset-details {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.detail-card {
  background: white;
  padding: 28px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  text-align: center;
}

.detail-card .detail-icon {
  width: 48px;
  height: 48px;
  background: var(--primary-50);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}

.detail-card .detail-icon i {
  font-size: 1.25rem;
  color: var(--primary);
}

.detail-card h4 {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 8px;
  font-family: var(--font-ui);
}

.detail-card p {
  font-size: 0.875rem;
  color: var(--gray-500);
}

.evaluation-section {
  background: white;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 32px;
  margin-bottom: 60px;
}

.metric-card {
  background: var(--gradient-dark);
  color: white;
  padding: 40px;
  border-radius: var(--radius-xl);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.metric-card::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.15) 0%, transparent 70%);
}

.metric-card .metric-icon {
  width: 72px;
  height: 72px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  position: relative;
}

.metric-card .metric-icon i {
  font-size: 1.75rem;
  color: white;
}

.metric-card h3 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 8px;
  color: var(--primary-200);
  font-family: var(--font-ui);
}

.metric-card h4 {
  font-size: 1rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 16px;
}

.metric-card p {
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.7;
}

.metric-card strong {
  color: var(--primary-200);
}

.tracks-container {
  margin-bottom: 60px;
}

.tracks-title {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 24px;
}

.tracks-title i {
  color: var(--primary);
}

.tracks-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 24px;
}

.track-card {
  background: var(--gray-50);
  padding: 32px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
}

.track-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-200);
}

.track-number {
  position: absolute;
  top: 16px;
  right: 20px;
  font-size: 4rem;
  font-weight: 800;
  color: var(--gray-300);
  line-height: 1;
}

.track-card h4 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 4px;
  font-family: var(--font-ui);
}

.track-subtitle {
  display: block;
  font-size: 0.875rem;
  color: var(--primary);
  font-weight: 500;
  margin-bottom: 16px;
}

.track-card p {
  font-size: 0.9375rem;
  color: var(--gray-600);
  line-height: 1.7;
  margin-bottom: 20px;
}

.track-eval {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: white;
  border-radius: var(--radius);
  border: 1px solid var(--gray-200);
}

.track-eval i {
  color: var(--primary);
}

.track-eval span {
  font-size: 0.875rem;
  color: var(--gray-600);
  font-weight: 500;
}

.notes-container {
  background: var(--primary-50);
  padding: 32px;
  border-radius: var(--radius-xl);
  border: 1px solid var(--primary-200);
}

.notes-container h3 {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--primary-dark);
  margin-bottom: 24px;
}

.notes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.note-item {
  display: flex;
  gap: 16px;
  background: white;
  padding: 20px;
  border-radius: var(--radius-md);
}

.note-icon {
  width: 40px;
  height: 40px;
  background: var(--gradient-primary);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.note-icon i {
  font-size: 1rem;
  color: white;
}

.note-content h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 6px;
  font-family: var(--font-ui);
}

.note-content p {
  font-size: 0.8125rem;
  color: var(--gray-500);
  line-height: 1.6;
}

.submission-section {
  background: var(--gray-50);
}

.submission-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: start;
}

@media (min-width: 900px) {
  .submission-content {
    grid-template-columns: 1fr 1fr;
  }
}

.submission-card {
  background: var(--gradient-dark);
  color: white;
  padding: 48px;
  border-radius: var(--radius-xl);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.submission-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at top right, rgba(6, 182, 212, 0.2) 0%, transparent 50%);
  pointer-events: none;
}

.submission-icon {
  width: 80px;
  height: 80px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  position: relative;
}

.submission-icon i {
  font-size: 2rem;
  color: white;
}

.submission-card h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 16px;
  font-family: var(--font-ui);
}

.submission-card p {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.7;
  margin-bottom: 28px;
}

.submission-steps {
  background: white;
  padding: 40px;
  border-radius: var(--radius-xl);
  border: 1px solid var(--gray-200);
}

.submission-steps h4 {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 24px;
}

.submission-steps h4 i {
  color: var(--primary);
}

.submission-steps ol {
  padding-left: 24px;
}

.submission-steps li {
  font-size: 0.9375rem;
  color: var(--gray-600);
  line-height: 1.8;
  margin-bottom: 12px;
  padding-left: 8px;
}

.submission-steps li::marker {
  color: var(--primary);
  font-weight: 600;
}

.organizers-section {
  background: white;
}

.organizers-grid {
  display: grid;
  gap: 48px;
  margin-bottom: 60px;
}

.organizers-group h3,
.organizers-group .group-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 24px;
  text-align: center;
  font-family: var(--font-ui);
}

.organizers-list {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 24px;
}

.organizers-list .organizer-card {
  width: 160px;
}

.organizer-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px;
  background: var(--gray-50);
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  transition: all 0.3s ease;
}

.organizer-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-200);
  transform: translateY(-8px);
}

.organizer-photo {
  width: 100%;
  aspect-ratio: 3 / 4;
  margin-bottom: 16px;
  overflow: hidden;
  border-radius: var(--radius-md);
}

.organizer-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.organizer-card h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--gray-900);
  text-align: center;
}

.advisors-list {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 24px;
}

.advisors-list .advisor-card {
  width: 160px;
}

.advisor-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px;
  background: var(--gray-50);
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  transition: all 0.3s ease;
}

.advisor-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-200);
  transform: translateY(-8px);
}

.advisor-photo {
  width: 100%;
  aspect-ratio: 3 / 4;
  margin-bottom: 16px;
  overflow: hidden;
  border-radius: var(--radius-md);
}

.advisor-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.advisor-card h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--gray-900);
  text-align: center;
}

.contact-section {
  display: flex;
  justify-content: center;
}

.contact-card {
  background: var(--gradient-dark);
  color: white;
  padding: 48px 64px;
  border-radius: var(--radius-xl);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.contact-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at bottom center, rgba(6, 182, 212, 0.15) 0%, transparent 60%);
}

.contact-icon {
  width: 64px;
  height: 64px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.contact-icon i {
  font-size: 1.5rem;
  color: white;
}

.contact-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 8px;
  font-family: var(--font-ui);
}

.contact-card p {
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 20px;
}

.contact-email {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  background: white;
  color: var(--primary-dark);
  text-decoration: none;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all 0.3s ease;
}

.contact-email:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.footer {
  background: var(--dark);
  color: white;
  padding: 60px 0 30px;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  margin-bottom: 30px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 8px;
  font-family: var(--font-heading);
}

.footer-logo .logo-img{
  height: 32px;
  width: auto;
  border-radius: var(--radius-sm);
}

.footer-logo i{
  color: var(--primary-light);
}

.footer-brand p {
  font-size: 0.875rem;
  color: var(--gray-400);
}

.footer-links {
  display: flex;
  align-items: center;
  justify-content: center;
}

.footer-acm-logo {
  height: 60px;
  width: auto;
  background: white;
  padding: 8px 16px;
  border-radius: var(--radius-lg);
}

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

.footer-bottom p {
  font-size: 0.8125rem;
  color: var(--gray-500);
}

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

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

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(-10px);
  }
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateX(-50%) translateY(0);
  }
  40% {
    transform: translateX(-50%) translateY(-10px);
  }
  60% {
    transform: translateX(-50%) translateY(-5px);
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .hero-stats {
    flex-direction: column;
    gap: 16px;
  }
  
  .stat-item {
    width: 100%;
    justify-content: center;
  }
  
  .timeline::before {
    left: 20px;
  }
  
  .timeline-marker {
    width: 40px;
    height: 40px;
  }
  
  .timeline-marker i {
    font-size: 1rem;
  }
  
  .timeline-item {
    gap: 16px;
  }
  
  .footer-content {
    flex-direction: column;
    gap: 24px;
    text-align: center;
  }
  
  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px 24px;
  }
}

@media (max-width: 480px) {
  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }
  
  .btn {
    width: 100%;
    justify-content: center;
  }
  
  .contact-card {
    padding: 32px 24px;
  }
}