html, body {
      margin: 0;
      padding: 0;
      background: #0b1220;
      color: #e2e8f0;
      font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
    }

    html.android-webview {
      background: #000000;
    }

    html.android-webview body {
      background: #000000;
    }

    body {
      min-height: 100vh;
    }

    .card {
      width: calc(100% - 32px);
      max-width: 360px;
      box-sizing: border-box;

      background: #111827;
      padding: 24px;
      border-radius: 12px;
      box-shadow: 0 10px 30px rgba(0,0,0,.35);

      margin: 48px auto 24px;
    }

    html.android-webview .card {
      background: #000000;
    }

    h1 {
      margin: 0 0 16px;
      font-size: 20px;
      color: #e5e7eb;
    }

    html.android-webview h1 {
      font-size: 50px;
      text-align: center;
    }

    label {
      display: block;
      font-size: 12px;
      color: #9ca3af;
      margin-top: 12px;
    }

    html.android-webview label {
      font-size: 24px;
    }

    input {
      width: 90%;
      margin-top: 6px;
      padding: 10px 12px;
      background: #0f172a;
      color: #e2e8f0;
      border: 1px solid #1f2937;
      border-radius: 8px;
    }

    html.android-webview input {
      margin-top: 12px;
      font-size: 30px;
      padding: 15px 20px;
      background: #000000;
      border: 1px solid #FFFFFF;
    }

    .btn {
      width: 100%;
      margin-top: 18px;
      padding: 10px 12px;
      border: 0;
      border-radius: 8px;
      background: #06b6d4;
      color: #0b1220;
      font-weight: 600;
      cursor: pointer;
    }

    html.android-webview .btn {
      margin-top: 48px;
      font-size: 30px;
      padding: 20px 24px;
      background: #960000;
      color: white;
      border-radius: 44px;
    }

    .btn:active {
      transform: translateY(1px);
    }

    .error {
      background: #3b0b0b;
      color: #fecaca;
      border: 1px solid #7f1d1d;
      padding: 10px 12px;
      border-radius: 8px;
      margin-bottom: 10px;
    }

    .hint {
      color: #94a3b8;
      font-size: 12px;
      margin-top: 8px;
      text-align: center;
    }

    .remember-row {
      margin-top: 10px;
    }

    .remember-label {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 12px;
      color: #9ca3af;
      cursor: pointer;
    }

    .remember-label input[type="checkbox"] {
      width: 14px;
      height: 14px;
      margin: 0;
      accent-color: #06b6d4;
    }