:root {
      --primary: #00d4ff;
      --secondary: #0972ff;
      --background: #001533;
      --text-light: #ffffff;
      --card-bg: rgba(255, 255, 255, 0.08);
      --transition: all 0.3s ease;
    }

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

    body {
      font-family: 'Roboto', sans-serif;
      font-size: 16px;
      background: var(--background);
      color: var(--text-light);
      line-height: 1.6;
      padding: 20px;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      align-items: center;
    }

    h1, h2, h3 {
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 10px;
    }

    h1 { font-size: 2rem; }
    h2 { font-size: 1.3rem; }

    a {
      color: var(--primary);
      text-decoration: none;
      font-weight: 500;
      transition: var(--transition);
    }
    a:hover { color: var(--secondary); }

    #header {
      text-align: center;
      margin-bottom: 20px;
    }
    #header img {
      max-width: 40px;
      vertical-align: middle;
      margin-right: 8px;
    }

    #page {
      display: grid;
      grid-template-columns: 1fr;
      gap: 20px;
      max-width: 1200px;
      width: 100%;
    }

    #content {
      background: var(--card-bg);
      padding: 20px;
      border-radius: 12px;
      box-shadow: 0 4px 15px rgba(0,0,0,0.3);
      text-align: center;
      transition: var(--transition);
    }
    #content:hover { transform: translateY(-5px); }
    #content img {
      max-width: 100%;
      border-radius: 10px;
      margin-bottom: 15px;
    }

    .sidebar-columns {
      display: grid;
      grid-template-columns: 1fr;
      gap: 20px;
    }
    .sidebar-column {
      background: var(--card-bg);
      padding: 20px;
      border-radius: 12px;
      box-shadow: 0 4px 10px rgba(0,0,0,0.25);
      transition: var(--transition);
    }
    .sidebar-column:hover { transform: translateY(-4px); }
    .sidebar-column h3 {
      border-bottom: 1px solid rgba(255,255,255,0.2);
      padding-bottom: 8px;
      margin-bottom: 12px;
    }
    .sidebar-column ul { list-style: none; }
    .sidebar-column li { margin-bottom: 10px; }
    .sidebar-column a {
      display: block;
      padding: 6px 8px;
      border-radius: 6px;
    }
    .sidebar-column a:hover {
      background: rgba(255,255,255,0.15);
      color: #fff;
    }

    /* Responsive Layout */
    @media (min-width: 768px) {
      #page { grid-template-columns: 2fr 3fr; }
      .sidebar-columns { grid-template-columns: repeat(3, 1fr); }
    }
    @media (min-width: 480px) and (max-width: 767px) {
      .sidebar-columns { grid-template-columns: repeat(2, 1fr); }
    }