:root {
    --bg:      #000000;
    --surface: #0a0a0a;
    --surface2:#111111;
    --border:  #222222;
    --border2: #333333;
    --text:    #ffffff;
    --muted:   #666666;
    --dim:     #444444;
    --accent:  #ffffff;
    --accent:  #8a9ba8;
  }
  *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; }

  body {
    background: var(--bg);
    color: var(--text);
    font-family: 'IBM Plex Sans', 'Helvetica Neue', Arial, sans-serif;
    font-size: 14px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    line-height: 1.6;
  }

  /* ── Header ── */
  header {
    border-bottom: 1px solid var(--border);
    padding: 0 48px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    background: rgba(0,0,0,.92);
    backdrop-filter: blur(12px);
    z-index: 100;
  }
  .brand {
    display: flex;
    align-items: center;
    gap: 16px;
  }
  .brand-name {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.05em;
    color: var(--text);
  }
  .brand-name em { color: var(--accent); font-style: normal; }
  .brand-ver {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 9px;
    color: var(--muted);
    border: 1px solid var(--border2);
    padding: 2px 6px;
    letter-spacing: 0.15em;
    text-transform: uppercase;
  }
  nav {
    display: flex;
    align-items: center;
    gap: 32px;
  }
  nav a {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    color: var(--muted);
    text-decoration: none;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    transition: color .15s;
  }
  nav a:hover { color: var(--text); }
  nav a.active { color: var(--text); }
  .nav-license {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    color: var(--accent) !important;
    border: 1px solid var(--accent);
    padding: 4px 12px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    transition: background .15s !important;
  }
  .nav-license:hover { background: var(--accent) !important; color: #000 !important; }

  /* ── Hero ── */
  .hero {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 80px 24px 60px;
  }

  .system-tag {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 10px;
    letter-spacing: 0.25em;
    color: var(--muted);
    text-transform: uppercase;
    margin-bottom: 32px;
    display: flex;
    align-items: center;
    gap: 12px;
  }
  .system-tag::before,
  .system-tag::after {
    content: '';
    display: block;
    width: 40px;
    height: 1px;
    background: var(--border2);
  }

  h1 {
    font-family: 'IBM Plex Sans', sans-serif;
    font-size: clamp(36px, 7vw, 80px);
    font-weight: 700;
    letter-spacing: -0.04em;
    line-height: 0.95;
    text-align: center;
    margin-bottom: 6px;
    color: var(--text);
  }
  h1 .accent { color: var(--accent); }

  .subtitle {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    color: var(--muted);
    letter-spacing: 0.08em;
    text-align: center;
    margin-top: 16px;
    margin-bottom: 52px;
  }

  /* ── Search ── */
  .search-wrap { width: 100%; max-width: 720px; }

  .search-box {
    display: flex;
    border: 1px solid var(--border2);
    background: var(--surface);
    transition: border-color .2s;
  }
  .search-box:focus-within {
    border-color: var(--text);
  }
  .search-box input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 15px;
    color: var(--text);
    padding: 16px 20px;
    letter-spacing: 0.02em;
  }
  .search-box input::placeholder {
    color: var(--dim);
    font-weight: 300;
  }
  .btn-search {
    background: var(--text);
    color: var(--bg);
    border: none;
    padding: 0 28px;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    cursor: pointer;
    transition: background .15s;
    white-space: nowrap;
  }
  .btn-search:hover { background: #e0e0e0; }
  .btn-lucky {
    background: transparent;
    color: var(--muted);
    border: none;
    border-left: 1px solid var(--border2);
    padding: 0 20px;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    cursor: pointer;
    transition: color .15s, background .15s;
    white-space: nowrap;
  }
  .btn-lucky:hover { color: var(--text); background: var(--surface2); }

  .search-meta {
    display: flex;
    justify-content: space-between;
    margin-top: 8px;
    padding: 0 2px;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 10px;
    color: var(--muted);
    letter-spacing: 0.05em;
  }
  .search-meta a { color: var(--muted); text-decoration: none; }
  .search-meta a:hover { color: var(--text); }

  /* ── License notice ── */
  .license-notice {
    width: 100%;
    max-width: 720px;
    margin-top: 24px;
    border: 1px solid #1e2535;
    background: #0d0f12;
    padding: 14px 20px;
    display: flex;
    gap: 14px;
    align-items: flex-start;
  }
  .license-notice .ln-icon {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    color: var(--accent);
    letter-spacing: 0.1em;
    white-space: nowrap;
    padding-top: 1px;
  }
  .license-notice p {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    color: #556270;
    line-height: 1.7;
    letter-spacing: 0.02em;
  }
  .license-notice strong { color: var(--accent); font-weight: 500; }
  .license-notice a { color: var(--accent); text-decoration: none; }
  .license-notice a:hover { text-decoration: underline; }

  /* ── Spinner ── */
  .spinner {
    display: none;
    width: 20px; height: 20px;
    border: 1px solid var(--border2);
    border-top-color: var(--text);
    border-radius: 50%;
    animation: spin .7s linear infinite;
    margin: 32px auto;
  }
  @keyframes spin { to { transform: rotate(360deg); } }

  /* ── Results ── */
  #results {
    width: 100%;
    max-width: 720px;
    margin-top: 28px;
    display: none;
  }
  .results-header {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 10px;
    color: var(--muted);
    letter-spacing: 0.05em;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  .results-header a {
    color: var(--accent);
    font-size: 10px;
    text-decoration: none;
    letter-spacing: 0.08em;
    text-transform: uppercase;
  }
  .results-header a:hover { text-decoration: underline; }

  .result-item {
    border-bottom: 1px solid var(--border);
    padding: 18px 0;
  }
  .result-item:last-child { border-bottom: none; }
  .ri-title {
    font-family: 'IBM Plex Sans', sans-serif;
    font-size: 15px;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 4px;
    letter-spacing: -0.01em;
  }
  .ri-url {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 10px;
    color: var(--dim);
    margin-bottom: 8px;
    letter-spacing: 0.02em;
  }
  .ri-snippet {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12px;
    color: var(--muted);
    line-height: 1.7;
    letter-spacing: 0.02em;
  }
  .ri-real {
    margin-top: 10px;
  }
  .ri-real a {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 10px;
    color: var(--muted);
    text-decoration: none;
    border: 1px solid var(--border2);
    padding: 4px 10px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    transition: color .15s, border-color .15s;
  }
  .ri-real a:hover { color: var(--text); border-color: var(--text); }

  /* ── Footer ── */
  footer {
    border-top: 1px solid var(--border);
    padding: 16px 48px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 10px;
    color: var(--muted);
    letter-spacing: 0.05em;
  }
  footer a { color: var(--muted); text-decoration: none; }
  footer a:hover { color: var(--text); }

  /* ── License Modal ── */
  .modal-bg {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.85);
    backdrop-filter: blur(8px);
    z-index: 200;
    align-items: center;
    justify-content: center;
  }
  .modal-bg.open { display: flex; }
  .modal {
    background: var(--surface);
    border: 1px solid var(--border2);
    padding: 48px;
    max-width: 480px;
    width: 90%;
    position: relative;
  }
  .modal-close {
    position: absolute;
    top: 20px; right: 24px;
    background: none;
    border: none;
    color: var(--dim);
    font-size: 18px;
    cursor: pointer;
    font-family: 'IBM Plex Mono', monospace;
  }
  .modal-close:hover { color: var(--text); }
  .modal-header {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 10px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 20px;
  }
  .modal h2 {
    font-family: 'IBM Plex Sans', sans-serif;
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--text);
    margin-bottom: 4px;
  }
  .modal .modal-sub {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    color: var(--muted);
    margin-bottom: 28px;
    letter-spacing: 0.03em;
  }
  .modal p {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    color: var(--muted);
    line-height: 1.8;
    margin-bottom: 24px;
    letter-spacing: 0.02em;
  }
  .modal .price-table {
    border: 1px solid var(--border);
    margin-bottom: 28px;
  }
  .price-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 16px;
    border-bottom: 1px solid var(--border);
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    color: var(--muted);
  }
  .price-row:last-child { border-bottom: none; }
  .price-row .price { color: var(--accent); font-weight: 500; }
  .btn-buy {
    width: 100%;
    padding: 14px;
    background: var(--text);
    color: var(--bg);
    border: none;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    cursor: pointer;
    transition: background .15s;
  }
  .btn-buy:hover { background: #ddd; }
  .modal-note {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 10px;
    color: var(--muted);
    text-align: center;
    margin-top: 14px;
    letter-spacing: 0.03em;
    line-height: 1.8;
  }
  
  /* ── Mobile Responsive ── */
  @media (max-width: 768px) {
    header {
      flex-direction: column;
      height: auto;
      padding: 16px;
      gap: 12px;
    }
    .brand {
      justify-content: center;
      text-align: center;
      flex-wrap: wrap;
    }
    nav {
      flex-wrap: wrap;
      justify-content: center;
      gap: 12px;
    }
    .hero {
      padding: 40px 16px 30px;
    }
    .search-box {
      flex-direction: column;
    }
    .search-box input {
      width: 100%;
      padding: 16px;
      border-bottom: 1px solid var(--border2);
    }
    .search-box button.btn-search,
    .search-box button.btn-lucky {
      width: 100%;
      padding: 16px;
      border-left: none;
      border-bottom: 1px solid var(--border2);
    }
    .search-meta {
      flex-direction: column;
      gap: 8px;
      align-items: center;
      text-align: center;
    }
    .license-notice {
      flex-direction: column;
      align-items: center;
      text-align: center;
    }
    footer {
      flex-direction: column;
      padding: 16px;
      gap: 12px;
      text-align: center;
    }
    .modal {
      padding: 24px 16px;
    }
  }