/* Global Styles from index.html */
:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-hover: #f1f5f9;
  --border: #e2e8f0;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --accent: #0284c7;
  --accent-hover: #0369a1;
  --success: #16a34a;
  --danger: #dc2626;
  --warning: #d97706;
  --card-shadow: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --nav-height: 70px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg);
  color: var(--text-primary);
  font-family: 'Inter', sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  padding-top: var(--nav-height); /* Space for fixed navbar */
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s;
}

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 60px 24px;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    display: flex;
    align-items: center;
    padding: 0 24px;
}

.nav-content {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
}

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

.nav-link {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    transition: color 0.2s;
}

.nav-link:hover, .nav-link.active {
    color: var(--accent);
    text-decoration: none;
}

/* Header */
header {
  margin-bottom: 64px;
  text-align: center;
}

.badge-group {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.badge {
  background: #e0f2fe;
  color: #0369a1;
  border: 1px solid #bae6fd;
  padding: 6px 16px;
  border-radius: 9999px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

h1 {
  font-size: 3rem;
  font-weight: 800;
  margin: 0 0 20px 0;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.lead {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto;
  line-height: 1.6;
}

/* Sections */
section {
  margin-bottom: 80px;
}

h2 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 32px;
  color: var(--text-primary);
  border-left: 5px solid var(--accent);
  padding-left: 20px;
  letter-spacing: -0.01em;
}

h3 {
    margin-top: 0;
    margin-bottom: 1rem;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

p {
    margin-bottom: 1rem;
}

ul, ol {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
    color: var(--text-secondary);
}

li {
    margin-bottom: 0.5rem;
}

/* Stats */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px 24px;
  text-align: center;
  transition: all 0.2s ease;
  box-shadow: var(--card-shadow);
}

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  border-color: var(--accent);
}

.stat-value {
  display: block;
  font-size: 3rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

/* Visualizations */
.viz-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
  gap: 32px;
}

.viz-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--card-shadow);
  transition: transform 0.2s;
}

.viz-card:hover {
  transform: translateY(-2px);
}

.viz-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  background: #f8fafc;
}

.viz-header h3 {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.viz-body {
  padding: 32px;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 320px;
  flex-grow: 1;
}

.viz-body img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
  transition: transform 0.3s ease;
}

.viz-body img:hover {
  transform: scale(1.02);
  box-shadow: 0 10px 15px -3px rgb(0 0 0 / 0.1);
}

.viz-footer {
  padding: 20px 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #f8fafc;
  flex-wrap: wrap;
  gap: 12px;
}

.viz-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-right: 16px;
  flex: 1;
  min-width: 200px;
}

.btn-group {
  display: flex;
  gap: 10px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s;
  border: 1px solid transparent;
  white-space: nowrap;
  cursor: pointer;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 6px -1px rgba(2, 132, 199, 0.2);
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 8px -1px rgba(2, 132, 199, 0.3);
  text-decoration: none;
}

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

.btn-secondary:hover {
  background: var(--surface-hover);
  border-color: var(--text-secondary);
  text-decoration: none;
  color: var(--text-primary);
}

.btn-outline {
  background: transparent;
  border-color: var(--border);
  color: var(--text-secondary);
}

.btn-outline:hover {
  border-color: var(--text-secondary);
  color: var(--text-primary);
  text-decoration: none;
}

/* Tables */
.table-container {
  overflow-x: auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  margin-top: 24px;
  box-shadow: var(--card-shadow);
}

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

th,
td {
  padding: 16px 24px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

th {
  background: #f8fafc;
  color: var(--text-secondary);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 0.05em;
}

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

tr:hover td {
  background: var(--surface-hover);
}

/* Footer */
footer {
  margin-top: 100px;
  padding-top: 40px;
  padding-bottom: 40px;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

@media (max-width: 768px) {
  h1 {
    font-size: 2.25rem;
  }
  
  .container {
      padding-top: 40px;
      padding-left: 16px;
      padding-right: 16px;
  }

  .viz-grid {
    grid-template-columns: 1fr;
  }
  
  .navbar {
    padding: 0 16px;
  }

  .nav-content {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding: 12px 0;
  }

  .nav-links {
      display: flex;
      width: 100%;
      overflow-x: auto;
      padding-bottom: 4px;
      gap: 16px;
      -webkit-overflow-scrolling: touch; /* Smooth scrolling on iOS */
  }

  .nav-link {
    white-space: nowrap;
    font-size: 0.85rem;
  }
  
  /* Hide scrollbar for cleaner look */
  .nav-links::-webkit-scrollbar {
    display: none;
  }
  .nav-links {
    -ms-overflow-style: none;
    scrollbar-width: none;
  }
}