/* ------------------------------
       CSS VARIABLES (THEMES)
    ------------------------------ */
    :root {
      --bg-color: #f4f4f4;
      --text-color: #1a1a1a;
      --nav-bg: #f4f4f4;
      --nav-text: #1a1a1a;
      --accent: #007FFF;
      --footer-bg: #f4f4f4;
    }

    html.dark,
    body.dark {
      --bg-color: #232323;
      --text-color: #e5e7eb;
      --nav-bg: #232323;
      --nav-text: #e5e7eb;
      --accent: #007FFF;
      --footer-bg: #232323;
    }

    /* ------------------------------
       GLOBAL STYLES
    ------------------------------ */
    * {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      font-family: Consolas, 'Lucida Console', Menlo, Monaco, 'Courier New', monospace, Arial, sans-serif;
      background-color: var(--bg-color);
      color: var(--text-color);
      transition: background-color 0.3s ease, color 0.3s ease;
    }

    a {
      color: var(--accent);
      text-decoration: none;
    }

    main {
      padding: 2rem;
      min-height: calc(100vh - 120px);
    }

    /* ------------------------------
       BRAND + SVG ICON
    ------------------------------ */
    .brand {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      color: var(--nav-text);
    }

    .logo-icon svg {
      display: block;
      fill: var(--accent);
      transition: fill 0.3s ease;
    }

    .brand-text {
      font-weight: 600;
      font-size: 1.1rem;
    }

    /* ------------------------------
       BRAND LOGO (PNG)
    ------------------------------ */
    .logo {
      width: 30px;
      height: 30px;
      object-fit: contain;
      transition: opacity 0.2s ease;
    }

    .logo-dark {
      display: none;
    }

    /* Show dark logo in dark mode */
    html.dark .logo-light {
      display: none;
    }

    html.dark .logo-dark {
      display: inline-block;
    }