:root {
  --primary-color: #2c3e50;
  --secondary-color: #3498db;
  --accent-color: #e74c3c;
  --success-color: #2ecc71;
  --warning-color: #f39c12;
  --text-color: #333;
  --text-muted: #7f8c8d;
  --bg-color: #f5f5f5;
  --card-bg: #ffffff;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  font-size: 16px;
}

body.ui-style-8 {
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

nav {
  background-color: var(--primary-color);
  color: white;
  padding: 0.8rem 1rem;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

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

nav a {
  color: white;
  text-decoration: none;
  padding: 0.5rem 1rem;
  transition: background-color 0.3s ease;
  white-space: nowrap;
  border-radius: 4px;
}

nav a:hover {
  background-color: rgba(255, 255, 255, 0.15);
}

.logo {
  font-weight: bold;
  font-size: 1.4rem;
  letter-spacing: 0.5px;
}

.nav-links {
  display: flex;
  flex-wrap: nowrap;
  gap: 0.3rem;
  flex: 1;
  justify-content: flex-end;
}

main {
  max-width: 1200px;
  margin: 2rem auto;
  padding: 0 1rem;
}

h1 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  color: var(--primary-color);
  font-weight: 700;
}

h2 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--primary-color);
  font-weight: 600;
}

h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.card {
  background: var(--card-bg);
  padding: 1.5rem;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.list-view {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

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

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

footer {
  text-align: center;
  padding: 2rem;
  background-color: var(--primary-color);
  color: white;
  margin-top: 3rem;
}

@media (max-width: 768px) {
  nav .container {
    flex-wrap: nowrap;
  }

  .logo {
    font-size: 1rem;
    padding: 0.3rem 0.5rem;
    min-width: 0;
    flex-shrink: 0;
  }

  .nav-links {
    flex: 1 1 0;
    min-width: 0;
    overflow: hidden;
    gap: 0;
  }

  .nav-links a {
    flex: 1 1 0;
    min-width: 0;
    padding: 0.3rem 0.2rem;
    font-size: 0.8rem;
    text-align: center;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  h1 {
    font-size: 1.5rem;
  }

  h2 {
    font-size: 1.3rem;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  main {
    padding: 0 0.8rem;
  }
}

@media (max-width: 480px) {
  body {
    font-size: 14px;
  }

  .logo {
    font-size: 0.9rem;
    padding: 0.2rem 0.4rem;
  }

  .nav-links a {
    font-size: 0.7rem;
    padding: 0.25rem 0.15rem;
  }

  h1 {
    font-size: 1.3rem;
  }
}

section {
  margin-bottom: 2rem;
}

.card h3 a,
.list-view h3 a {
  color: var(--primary-color);
  text-decoration: none;
}

.card h3 a:hover,
.list-view h3 a:hover {
  color: var(--secondary-color);
}