* {
  box-sizing: border-box;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont;
}

body {
  margin: 0;
  background: #0b0f14;
  color: #e6edf3;
}

.top-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 32px;
  background: #0f172a;
  border-bottom: 1px solid #1f2937;
}

.top-nav .brand {
  font-weight: 700;
  font-size: 18px;
}

.top-nav nav a {
  color: #9ca3af;
  margin-left: 20px;
  text-decoration: none;
  font-size: 14px;
}

.top-nav nav a.active,
.top-nav nav a:hover {
  color: #facc15;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 48px 24px;
}

.hero h1 {
  font-size: 42px;
  margin-bottom: 12px;
}

.hero p {
  color: #9ca3af;
  font-size: 16px;
}

.labs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 48px;
}

.lab-card {
  background: #020617;
  border: 1px solid #1f2937;
  border-radius: 12px;
  padding: 24px;
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.lab-card:hover {
  transform: translateY(-4px);
  border-color: #facc15;
}

.lab-card h3 {
  margin-top: 0;
}

.lab-card p {
  font-size: 14px;
  color: #9ca3af;
}

.lab-card a {
  display: inline-block;
  margin-top: 12px;
  color: #facc15;
  text-decoration: none;
  font-weight: 600;
}

footer {
  text-align: center;
  padding: 32px;
  color: #6b7280;
  font-size: 13px;
}