*, *::before, *::after { box-sizing: border-box; }
    body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
           background: #ffffff; color: #111; padding: 1.5rem; max-width: 1000px; margin: auto; }
    h1 { color: #1e40af; margin-bottom: 0.3rem; }
    h2 { color: #555; font-size: 1rem; margin-bottom: 1.5rem; font-weight: normal; }
    .loading { color: #666; padding: 2rem; text-align: center; }

    .nav-header { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center;
                  padding: 0.6rem 0; margin-bottom: 1rem; border-bottom: 1px solid #e5e7eb; }
    .nav-header h1 { font-size: 1.1rem; margin: 0 0.6rem 0 0; white-space: nowrap; color: #1e40af; }
    .btn { border: 1px solid #ccc; background: #f0f0f2; color: #111; padding: 0.35rem 0.7rem;
           border-radius: 0.5rem; cursor: pointer; font-size: 0.85rem; text-decoration: none; }
    .btn:hover { border-color: #93c5fd; }

    table { width: 100%; border-collapse: collapse; margin-bottom: 1rem; }
    th, td { padding: 0.7rem 1rem; text-align: left; border-bottom: 1px solid #e5e7eb; }
    th { background: #f8f8fa; color: #555; font-weight: 600; font-size: 0.85rem; text-transform: uppercase; }
    td { font-size: 0.95rem; }
    tr:hover td { background: #f0f4ff; }

    .rank { color: #1e40af; font-weight: 700; width: 2.5rem; text-align: center; }
    .domain { color: #555; font-size: 0.85rem; }
    .domain-link { cursor: pointer; }
    .domain-link:hover { text-decoration: underline; }
    .badge { display: inline-block; background: #2563eb; color: #fff; font-size: 0.7rem;
             padding: 0.1rem 0.4rem; border-radius: 0.3rem; margin-left: 0.4rem;
             cursor: pointer; vertical-align: middle; }
    .badge:hover { background: #1d4ed8; }
    .domain-list { display: none; margin-top: 0.4rem; padding: 0.3rem 0.6rem;
                   background: #f8f8fa; border-radius: 4px; border: 1px solid #e5e7eb;
                   font-size: 0.8rem; line-height: 1.6; }
    .domain-list.open { display: block; }
    .domain-list span { color: #888; font-size: 0.75rem; }
    .category { color: #888; font-size: 0.8rem; white-space: nowrap; }
    .version { font-style: italic; }
    .scan-info { color: #888; font-size: 0.8rem; margin-top: 1.5rem; padding: 0.5rem 0.8rem;
                 background: #f8f8fa; border-radius: 6px; border: 1px solid #e5e7eb; }