/* Root theme variables */
:root {
    --bg: #f0f4f8;
    --text: #333;
    --card-bg: #fff;
    --shadow: rgba(0, 0, 0, 0.1);
  }
  
  :root.dark {
    --bg: #1e1e1e;
    --text: #e0e0e0;
    --card-bg: #2c2c2c;
    --shadow: rgba(0, 0, 0, 0.6);
  }
  
  /* Global styles */
  body {
    font-family: 'Segoe UI', sans-serif;
    background: var(--bg);
    color: var(--text);
    margin: 0;
    padding: 0;
  }
  
  .container {
    max-width: 960px;
    margin: auto;
    padding: 2rem;
    text-align: center;
  }
  
  h1 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: var(--text);
  }
  
  /* Dark mode toggle button */
  .toggle-btn {
    background: var(--card-bg);
    border: 2px solid var(--text);
    color: var(--text);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    cursor: pointer;
    margin: 1rem;
    transition: all 0.3s;
  }
  
  .toggle-btn:hover {
    background: var(--text);
    color: var(--bg);
  }
  
  /* Grid layout for cards */
  .grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 1.5rem;
    justify-content: center;
  }
  
  /* Link cards */
  .card {
    background: var(--card-bg);
    border-radius: 1rem;
    padding: 1rem;
    box-shadow: 0 4px 20px var(--shadow);
    text-decoration: none;
    color: var(--text);
    transition: transform 0.2s, box-shadow 0.2s;
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  
  .card:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 24px var(--shadow);
  }
  
  .favicon {
    width: 32px;
    height: 32px;
    margin-bottom: 0.5rem;
  }
  
  /* Link text */
  .card span {
    font-weight: 500;
    font-size: 1rem;
    word-break: break-word;
  }

  .category-nav {
    margin-bottom: 2rem;
  }
  
  .category-link {
    display: inline-block;
    margin: 0.25rem 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--card-bg);
    color: var(--text);
    border: 1px solid var(--text);
    border-radius: 1rem;
    text-decoration: none;
    transition: background 0.2s;
  }
  
  .category-link:hover {
    background: var(--text);
    color: var(--bg);
  }
  .category-dropdown {
    margin-bottom: 2rem;
    font-size: 1rem;
  }
  
  .category-dropdown select {
    padding: 0.5rem 1rem;
    border-radius: 1rem;
    border: 1px solid var(--text);
    background: var(--card-bg);
    color: var(--text);
    cursor: pointer;
    transition: background 0.2s;
  }
  
  .category-dropdown label {
    margin-right: 0.5rem;
  }

  .category-bar {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 1rem;
  }
  
  .category-dropdown select {
    padding: 0.4rem 0.75rem;
    border-radius: 1rem;
    border: 1px solid var(--text);
    background: var(--card-bg);
    color: var(--text);
    cursor: pointer;
  }
  
  .category-dropdown label {
    margin-right: 0.5rem;
  }
  .top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem 0 2rem;
    max-width: 960px;
    margin: auto;
    flex-wrap: wrap;
    gap: 1rem;
  }
  
  .toggle-btn {
    background: var(--card-bg);
    border: 2px solid var(--text);
    color: var(--text);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    cursor: pointer;
    transition: all 0.3s;
  }
  
  .toggle-btn:hover {
    background: var(--text);
    color: var(--bg);
  }
  
  .category-dropdown {
    display: flex;
    align-items: center;
  }
  
  .category-dropdown select {
    padding: 0.4rem 0.75rem;
    border-radius: 1rem;
    border: 1px solid var(--text);
    background: var(--card-bg);
    color: var(--text);
    cursor: pointer;
  }
  
  .category-dropdown label {
    margin-right: 0.5rem;
  }