:root {
      --bg: #f1efe7;
      --text: #333;
      --accent: #2a4a74;
      --button-bg: #ffffff;
      --button-border: #c9d8ed;
      --button-hover: #eaf1fb;
    }

    body.dark {
      --bg: #1f1f1f;
      --text: #e4e4e4;
      --accent: #90c4ff;
      --button-bg: #2a2a2a;
      --button-border: #444;
      --button-hover: #333;
    }

    * {
      box-sizing: border-box;
      transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
    }

    body {
      margin: 0;
      font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
      background: var(--bg);
      color: var(--text);
    }

    .top-container {
      max-width: 900px;
      margin: 2rem auto 1rem auto;
      padding: 0 1rem;
    }

    header {
      background-color: var(--button-bg);
      color: var(--accent);
      padding: 1.5rem 2rem;
      text-align: center;
      font-size: 2.2rem;
      font-weight: 600;
      border-radius: 20px;
      box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
      border: 2px solid var(--button-border);
      width: 100%;
    }

    .search-container {
      display: flex;
      justify-content: flex-end;
      /*margin-top: 1rem;*/
    }

    .search-container input {
      padding: 0.6rem 1rem;
      font-size: 1rem;
      border: 2px solid var(--button-border);
      border-radius: 8px;
      outline: none;
      width: 250px;
      background-color: var(--button-bg);
      color: var(--accent);
    }

    .search-container input:focus {
      border-color: var(--accent);
      width: 400px;
    }

    .container {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 1.2rem;
      padding: 2rem 1rem;
      max-width: 900px;
      margin: 0 auto;
    }

    a.button {
      text-decoration: none;
      background-color: var(--button-bg);
      color: var(--accent);
      padding: 0.9rem 1rem;
      border-radius: 10px;
      text-align: center;
      font-size: 1rem;
      font-weight: 500;
      display: block;
      transition: background-color 0.2s ease, transform 0.2s ease;
      box-shadow: 0 2px 4px rgba(0, 0, 0, 0.04);
      border: 1.5px solid var(--button-border);
    }

    a.button:hover {
      background-color: var(--button-hover);
      transform: translate(-2px) scale(1.05);
    }

    .toggle-container {
      display: flex;
      justify-content: flex-end;
      max-width: 900px;
      margin: 0 auto;
      padding: 0 1rem 2rem 1rem;
    }

    .toggle-container button {
      padding: 0.6rem 1.2rem;
      font-size: 1rem;
      border: none;
      border-radius: 8px;
      background-color: var(--accent);
      color: #fff;
      cursor: pointer;
      transition: background-color 0.2s ease;
    }

    .toggle-container button:hover {
      background-color: #1e3e65;
    }