body {
      display: flex;
      align-items: center;
      justify-content: center;
      min-height: 100vh;
      padding: var(--space-4);
    }
    .card {
      background: var(--surface);
      backdrop-filter: blur(24px);
      -webkit-backdrop-filter: blur(24px);
      border: 1px solid var(--border-ui);
      border-radius: var(--radius-xl);
      padding: 52px 48px;
      width: 100%;
      max-width: 440px;
      box-shadow: var(--shadow-lux);
      text-align: center;
    }
    .logo-img {
      width: 72px;
      height: 72px;
      border-radius: 50%;
      margin: 0 auto 16px;
      display: block;
      border: 2px solid rgba(196, 106, 58, 0.3);
    }
    h1 {
      font-family: var(--font-serif);
      font-size: 26px;
      color: var(--text-main);
      font-weight: 600;
      margin-bottom: 4px;
    }
    .subtitle {
      font-family: var(--font-sans);
      font-size: 11px;
      font-weight: 700;
      letter-spacing: 0.15em;
      text-transform: uppercase;
      color: var(--gilpin-gold);
      margin-bottom: 28px;
    }
    .field {
      margin-bottom: 16px;
      text-align: left;
    }
    label {
      display: block;
      font-family: var(--font-sans);
      font-size: 11px;
      font-weight: 600;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      color: var(--text-muted);
      margin-bottom: 6px;
    }
    input[type="text"], input[type="email"], input[type="password"] {
      width: 100%;
      padding: 13px 16px;
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      font-size: 14px;
      font-family: var(--font-sans);
      color: var(--text-main);
      background: rgba(255, 255, 255, 0.04);
      outline: none;
      transition: border-color var(--duration-fast) ease,
                  box-shadow var(--duration-fast) ease;
    }
    input::placeholder { color: var(--text-faint); }
    .forgot-link {
      display: block;
      text-align: right;
      margin-top: 6px;
      font-size: 12px;
      font-family: var(--font-sans);
    }
    .forgot-link a {
      color: var(--gilpin-gold);
      text-decoration: none;
    }
    .forgot-link a:hover { text-decoration: underline; }
    .btn-signin {
      width: 100%;
      padding: 14px;
      background: var(--gilpin-gold);
      color: #fff;
      border: none;
      border-radius: var(--radius-md);
      font-family: var(--font-sans);
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      cursor: pointer;
      margin-top: 8px;
      transition: all var(--duration-fast) ease;
    }
    .btn-signin:hover {
      background: var(--gilpin-gold-light);
      transform: translateY(-1px);
      box-shadow: 0 4px 16px rgba(196, 106, 58, 0.35);
    }
    .btn-signin:active { transform: translateY(0); }

    /* Divider */
    .or-divider {
      display: flex;
      align-items: center;
      gap: 16px;
      margin: 22px 0;
    }
    .or-divider::before, .or-divider::after {
      content: '';
      flex: 1;
      height: 1px;
      background: var(--border-subtle);
    }
    .or-divider span {
      font-family: var(--font-sans);
      font-size: 11px;
      font-weight: 600;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      color: var(--text-faint);
    }

    /* Google button */
    .btn-google {
      width: 100%;
      padding: 13px;
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      font-family: var(--font-sans);
      font-size: 13px;
      font-weight: 600;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      transition: all var(--duration-fast) ease;
    }
    .btn-google:hover {
      background: rgba(255, 255, 255, 0.1);
      border-color: var(--gilpin-gold);
      transform: translateY(-1px);
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    }
    .btn-google:active { transform: translateY(0); }
    .btn-google svg { flex-shrink: 0; }

    /* Domain notice */
    .domain-notice {
      margin-top: 12px;
      padding: 10px 14px;
      background: rgba(196, 106, 58, 0.06);
      border: 1px solid rgba(196, 106, 58, 0.15);
      border-radius: var(--radius-md);
      font-family: var(--font-sans);
      font-size: 12px;
      color: var(--text-muted);
      display: flex;
      align-items: center;
      gap: 8px;
      justify-content: center;
    }
    .domain-notice strong { color: var(--text-main); }

    .error {
      margin-bottom: 18px;
      padding: 12px 14px;
      background: rgba(239, 68, 68, 0.1);
      border-left: 3px solid var(--color-error);
      font-family: var(--font-sans);
      font-size: 13px;
      color: var(--color-error);
      border-radius: var(--radius-sm);
      text-align: left;
    }
    .register-link {
      text-align: center;
      margin-top: 20px;
      font-family: var(--font-sans);
      font-size: 13px;
      color: var(--text-faint);
    }
    .register-link a {
      color: var(--gilpin-gold);
      text-decoration: none;
    }
    .register-link a:hover { text-decoration: underline; }

    @media (max-width: 480px) {
      body { padding: 16px; }
      .card { padding: 36px 24px; }
      h1 { font-size: 22px; }
      .logo-img { width: 56px; height: 56px; }
      .domain-notice { font-size: 11px; }
    }