@font-face {
      font-family: 'Syne';
      src: url('https://api.coolio.website/assets/fonts/Syne/Syne-VariableFont_wght.ttf') format('truetype');
      font-weight: 100 900;
      font-style: normal;
      font-display: swap;
    }

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

    body {
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      align-items: center;
      background: #121212;
      color: #e0e0e0;
      font-family: 'Syne', sans-serif;
      padding: 2rem;
    }

    /* ── NAV ── */
    nav {
      width: 100%;
      max-width: 720px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 2.5rem;
      padding-bottom: 1rem;
      border-bottom: 1px solid #222;
    }

    .nav-logo {
      font-weight: 800;
      font-size: 1rem;
      color: #e0e0e0;
      text-decoration: none;
    }

    .nav-logo span { color: #00bfff; }

    .nav-links {
      display: flex;
      flex-wrap: wrap;
      gap: 0.5rem 1rem;
      font-size: 0.82rem;
    }

    .nav-links a {
      color: #00bfff;
      text-decoration: none;
      font-weight: 600;
    }

    .nav-links a:hover { text-decoration: underline; }

    /* ── HERO ── */
    .hero {
      width: 100%;
      max-width: 720px;
      text-align: center;
      margin-bottom: 2.5rem;
    }

    .hero h1 {
      font-size: 2rem;
      font-weight: 800;
      margin-bottom: 0.5rem;
    }

    .hero p {
      color: #c8c8c8;
      max-width: 480px;
      margin: 0 auto;
      line-height: 1.6;
    }

    /* ── FILE EXPLORER ── */
    .explorer {
      width: 100%;
      max-width: 720px;
      border: 1px solid #222;
      border-radius: 6px;
      overflow: hidden;
      margin-bottom: 2.5rem;
    }

    .explorer-toolbar {
      background: #181818;
      border-bottom: 1px solid #222;
      padding: 0.6rem 1rem;
      display: flex;
      align-items: center;
      gap: 0.5rem;
      flex-wrap: wrap;
    }

    .breadcrumb {
      display: flex;
      align-items: center;
      gap: 0.3rem;
      font-size: 0.78rem;
      flex: 1;
      flex-wrap: wrap;
    }

    .breadcrumb-item {
      color: #00bfff;
      cursor: pointer;
      font-weight: 600;
    }

    .breadcrumb-item:hover { text-decoration: underline; }

    .breadcrumb-item.current {
      color: #888;
      cursor: default;
    }

    .breadcrumb-item.current:hover { text-decoration: none; }

    .breadcrumb-sep { color: #333; font-size: 0.75rem; }

    .explorer-body { background: #121212; }

    .explorer-empty {
      padding: 2rem;
      text-align: center;
      color: #555;
      font-size: 0.85rem;
    }

    .explorer-item {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      padding: 0.65rem 1rem;
      border-bottom: 1px solid #1a1a1a;
      cursor: pointer;
      transition: background 0.1s;
      text-decoration: none;
      color: inherit;
    }

    .explorer-item:last-child { border-bottom: none; }
    .explorer-item:hover { background: #181818; }

    .item-icon {
      font-size: 0.9rem;
      width: 18px;
      text-align: center;
      flex-shrink: 0;
    }

    .item-name {
      flex: 1;
      font-size: 0.85rem;
      font-weight: 600;
      color: #e0e0e0;
    }

    .item-name.folder { color: #00bfff; }

    .item-meta {
      font-size: 0.72rem;
      color: #444;
    }

    .item-ext {
      font-size: 0.65rem;
      padding: 0.15rem 0.4rem;
      border-radius: 3px;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 0.05em;
    }

    .ext-html { background: #0d1f2d; color: #00bfff; }
    .ext-pdf  { background: #1f0d0d; color: #ff6b6b; }
    .ext-md   { background: #0d1f10; color: #00cc88; }

    .loading {
      padding: 2rem;
      text-align: center;
      color: #555;
      font-size: 0.85rem;
    }

    .error {
      padding: 2rem;
      text-align: center;
      color: #ff6b6b;
      font-size: 0.85rem;
    }

    /* ── FOOTER ── */
    footer {
      margin-top: auto;
      padding-top: 1.5rem;
      font-size: 0.9rem;
      text-align: center;
      width: 100%;
      max-width: 720px;
    }

    .footer-links {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 0.6rem 1rem;
      margin-bottom: 0.8rem;
    }

    .footer-links a {
      color: #00bfff;
      text-decoration: none;
      font-weight: 600;
    }

    .footer-links a:hover { text-decoration: underline; }

    .status iframe { opacity: 0.9; }

    /* ── SUMMARY ── */
    .summary {
      width: 100%;
      max-width: 720px;
      margin-bottom: 2rem;
    }

    .summary-label {
      font-size: 0.72rem;
      font-weight: 600;
      color: #444;
      text-transform: uppercase;
      letter-spacing: 0.08em;
      margin-bottom: 0.75rem;
    }

    .summary-domain {
      border: 1px solid #222;
      border-radius: 6px;
      overflow: hidden;
      margin-bottom: 0.75rem;
    }

    .summary-domain-header {
      background: #181818;
      padding: 0.6rem 1rem;
      font-size: 0.82rem;
      font-weight: 700;
      color: #e0e0e0;
      border-bottom: 1px solid #222;
    }

    .summary-row {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      padding: 0.6rem 1rem;
      border-bottom: 1px solid #1a1a1a;
      font-size: 0.8rem;
    }

    .summary-row:last-child { border-bottom: none; }

    .summary-category {
      color: #888;
      min-width: 100px;
      font-weight: 600;
    }

    .summary-latest {
      flex: 1;
      color: #555;
      font-size: 0.75rem;
    }

    .summary-latest a {
      color: #00bfff;
      text-decoration: none;
      font-weight: 600;
    }

    .summary-latest a:hover { text-decoration: underline; }

    .summary-date {
      font-size: 0.72rem;
      color: #444;
    }

    .summary-empty {
      color: #333;
      font-size: 0.75rem;
      font-style: italic;
    }