/* Self-CriTeach Project Page Styles */

:root {
  --primary-color: #1a365d;
  --accent-color: #3182ce;
  --success-color: #38a169;
  --warning-color: #dd6b20;
  --bg-color: #ffffff;
  --bg-secondary: #f7fafc;
  --text-color: #2d3748;
  --text-light: #718096;
  --code-bg: #1e293b;
}

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

body {
  font-family: 'Source Sans Pro', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background: var(--bg-color);
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 1rem;
}

h1 { font-size: 3rem; }
h2 { font-size: 2rem; margin-top: 3rem; }
h3 { font-size: 1.5rem; margin-top: 2rem; }

a {
  color: var(--accent-color);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--primary-color);
  text-decoration: underline;
}

/* Navigation */
nav {
  position: sticky;
  top: 0;
  background: var(--bg-color);
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  z-index: 1000;
  padding: 1rem 0;
}

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

nav .logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--primary-color);
}

nav ul {
  display: flex;
  list-style: none;
  gap: 2rem;
}

nav a {
  color: var(--text-color);
  font-weight: 500;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 4rem 0;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
}

.hero h1 {
  font-size: 3.5rem;
  margin-bottom: 1rem;
  color: white;
}

.hero .subtitle {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  opacity: 0.95;
}

.hero .venue {
  display: inline-block;
  background: rgba(255, 255, 255, 0.2);
  padding: 0.5rem 1.5rem;
  border-radius: 25px;
  margin: 1rem 0;
  font-weight: 500;
}

.hero .authors {
  margin: 1.5rem 0;
  font-size: 1.1rem;
}

.hero .authors em {
  opacity: 0.9;
  font-size: 0.95rem;
}

.hero-buttons {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin: 2rem 0;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 0.75rem 2rem;
  border-radius: 8px;
  font-weight: 600;
  transition: all 0.3s ease;
  text-decoration: none;
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
  text-decoration: none;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.2);
  color: white;
  border: 2px solid white;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.3);
  text-decoration: none;
}

/* Sections */
section {
  padding: 4rem 0;
}

section:nth-child(even) {
  background: var(--bg-secondary);
}

/* Contribution Cards */
.contribution-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin: 2rem 0;
}

.contribution-card {
  background: white;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.contribution-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 15px rgba(0,0,0,0.15);
}

.contribution-card h3 {
  color: var(--primary-color);
  margin-top: 0;
  font-size: 1.3rem;
}

.contribution-card .icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  display: block;
}

.contribution-card .metric {
  font-size: 2rem;
  font-weight: bold;
  color: var(--success-color);
  margin-top: 1rem;
}

/* Results Table */
.results-table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  background: white;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.results-table th {
  background: var(--primary-color);
  color: white;
  padding: 1rem;
  text-align: left;
  font-weight: 600;
}

.results-table td {
  padding: 1rem;
  border-bottom: 1px solid #e2e8f0;
}

.results-table tr:last-child td {
  border-bottom: none;
}

.results-table tr:nth-child(even) {
  background: var(--bg-secondary);
}

.results-table .highlight {
  background: #d4edda;
  font-weight: 600;
}

.results-table .best {
  color: var(--success-color);
  font-weight: bold;
}

/* Method Diagram */
.method-diagram {
  text-align: center;
  margin: 3rem 0;
}

.method-diagram img {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

/* Code Block */
pre {
  background: var(--code-bg);
  color: #f1f5f9;
  padding: 1.5rem;
  border-radius: 8px;
  overflow-x: auto;
  margin: 1.5rem 0;
  font-family: 'Fira Code', 'Consolas', monospace;
  font-size: 0.9rem;
  line-height: 1.5;
}

code {
  font-family: 'Fira Code', 'Consolas', monospace;
  background: #f4f4f4;
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  font-size: 0.9em;
}

pre code {
  background: none;
  padding: 0;
}

/* Resource Grid */
.resource-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin: 2rem 0;
}

.resource-card {
  background: white;
  padding: 1.5rem;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
  text-align: center;
  transition: transform 0.3s ease;
}

.resource-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.resource-card h3 {
  margin-top: 0;
  color: var(--primary-color);
}

.resource-card .icon {
  font-size: 2.5rem;
  display: block;
  margin-bottom: 1rem;
}

/* Citation Box */
.citation-box {
  background: var(--bg-secondary);
  padding: 2rem;
  border-radius: 8px;
  border-left: 4px solid var(--accent-color);
  margin: 2rem 0;
  position: relative;
}

.citation-box pre {
  margin: 0;
  background: white;
}

.copy-button {
  position: absolute;
  top: 1rem;
  right: 1rem;
  padding: 0.5rem 1rem;
  background: var(--accent-color);
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.9rem;
}

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

/* Team Section */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin: 2rem 0;
}

.team-member {
  text-align: center;
}

.team-member img {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 1rem;
}

.team-member h4 {
  margin: 0.5rem 0;
  color: var(--primary-color);
}

.team-member .affiliation {
  font-size: 0.9rem;
  color: var(--text-light);
}

/* Footer */
footer {
  background: var(--primary-color);
  color: white;
  text-align: center;
  padding: 2rem 0;
  margin-top: 4rem;
}

footer a {
  color: white;
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2rem;
  }

  .hero .subtitle {
    font-size: 1.2rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .contribution-grid,
  .resource-grid,
  .team-grid {
    grid-template-columns: 1fr;
  }

  nav ul {
    flex-direction: column;
    gap: 0.5rem;
  }
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 0.6s ease-out;
}