:root {
      --paper: #FFFFFF;
      --mist: #F5F5F5;
      --ink: #0A0A0A;
      --ink-60: rgba(10,10,10,0.62);
      --ink-40: rgba(10,10,10,0.38);
      --ink-15: rgba(10,10,10,0.12);
      --emerald: #0B6E3D;
      --emerald-700: #0E7F46;
      --rust: #9A2E1A;
      --bg: var(--paper);
      --fg: var(--ink);
      --surface: var(--paper);
      --surface-2: var(--mist);
      --border: var(--ink-15);
      --cta-fg: #ffffff;
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
      background: var(--bg);
      color: var(--fg);
      min-height: 100vh;
      -webkit-font-smoothing: antialiased;
    }
    header {
      padding: 18px 28px;
      display: flex; justify-content: space-between; align-items: center;
      background: var(--surface);
      border-bottom: 1px solid var(--border);
      position: sticky; top: 0; z-index: 10;
    }
    header .brand { display: flex; align-items: center; gap: 10px; }
    header h1 { font-size: 15px; font-weight: 600; letter-spacing: 0.02em; }
    header .controls { display: flex; gap: 8px; align-items: center; }
    header button {
      padding: 8px 14px; border: 1px solid var(--border);
      background: var(--surface); color: var(--fg); border-radius: 6px; cursor: pointer;
      font: inherit; font-size: 13px; font-weight: 500;
    }
    header button:hover { background: var(--surface-2); }
    .container { padding: 24px 28px; max-width: 1080px; margin: 0 auto; }

    .gate {
      max-width: 420px;
      margin: 96px auto;
      padding: 32px;
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 12px;
    }
    .gate h2 { font-size: 22px; margin-bottom: 8px; font-weight: 700; }
    .gate p { color: var(--ink-60); font-size: 14px; margin-bottom: 24px; line-height: 1.5; }
    .gate .mode-tabs {
      display: flex;
      gap: 4px;
      padding: 4px;
      background: var(--surface-2);
      border-radius: 10px;
      margin-bottom: 24px;
    }
    .gate .mode-tab {
      flex: 1;
      padding: 9px 12px;
      border: none;
      background: transparent;
      color: var(--ink-60);
      border-radius: 7px;
      cursor: pointer;
      font: inherit;
      font-size: 13px;
      font-weight: 600;
      transition: background 120ms, color 120ms;
    }
    .gate .mode-tab:hover { color: var(--fg); }
    .gate .mode-tab.active { background: var(--surface); color: var(--fg); box-shadow: 0 1px 2px rgba(0,0,0,0.06); }
    .gate .user-select { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 16px; }
    .gate .user-btn {
      padding: 18px;
      border: 1px solid var(--border);
      background: var(--surface);
      color: var(--fg);
      border-radius: 10px;
      cursor: pointer;
      font: inherit;
      font-size: 15px;
      font-weight: 600;
      transition: background 120ms, border-color 120ms;
    }
    .gate .user-btn:hover { background: var(--surface-2); border-color: var(--emerald); }
    .gate .user-btn.loading { opacity: 0.5; cursor: wait; }
    .gate .user-btn.selected { background: var(--emerald); color: var(--cta-fg); border-color: var(--emerald); }
    .gate .pw-input {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border);
      border-radius: 8px;
      font-size: 14px;
      margin-bottom: 12px;
      font-family: inherit;
      background: var(--bg);
      color: var(--fg);
    }
    .gate .pw-submit {
      width: 100%;
      padding: 12px;
      border: none;
      background: var(--emerald);
      color: var(--cta-fg);
      border-radius: 8px;
      font: inherit;
      font-size: 14px;
      font-weight: 600;
      cursor: pointer;
    }
    .gate .pw-submit:hover { background: var(--emerald-700); }
    .gate .pw-submit:disabled { opacity: 0.5; cursor: not-allowed; }
    .gate .err { color: var(--rust); font-size: 13px; margin-top: 12px; min-height: 18px; }
    .gate .hint { font-size: 12px; color: var(--ink-40); margin-top: 20px; text-align: center; }
    .gate .hint a { color: var(--emerald); text-decoration: none; }

    .hub-intro { margin: 8px 0 24px; }
    .hub-intro h2 { font-size: 20px; font-weight: 700; margin-bottom: 6px; }
    .hub-intro p { color: var(--ink-60); font-size: 14px; }
    .tool-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 14px; }
    a.tool-card, div.tool-card {
      display: block;
      padding: 22px;
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 12px;
      text-decoration: none;
      color: var(--fg);
      transition: border-color 120ms, background 120ms;
    }
    a.tool-card:hover { border-color: var(--emerald); background: var(--surface-2); }
    .tool-card .tool-name { font-size: 16px; font-weight: 700; display: flex; align-items: center; gap: 8px; }
    .tool-card .tool-desc { font-size: 13px; color: var(--ink-60); margin-top: 6px; line-height: 1.5; }
    .tool-card .tool-path { font-family: 'JetBrains Mono', monospace; font-size: 11px; color: var(--ink-40); margin-top: 12px; }
    .tool-card.disabled { opacity: 0.55; cursor: default; }
    .badge {
      font-size: 10px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em;
      padding: 2px 7px; border-radius: 9px;
    }
    .badge.live { background: rgba(11,110,61,0.12); color: var(--emerald); }
    .badge.soon { background: var(--surface-2); color: var(--ink-40); }

    @media (max-width: 640px) {
      header { padding: 14px 18px; }
      .container { padding: 16px 18px; }
    }