* { box-sizing: border-box; margin: 0; padding: 0; }
    body { font-family: -apple-system, 'Noto Sans TC', sans-serif; background: var(--qq-bg-page); color: var(--qq-text); min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 20px; }
    .card {
      background: var(--qq-bg-card-alt); border: 1px solid var(--qq-border); border-radius: 20px;
      padding: 40px 36px; width: 100%; max-width: 360px; text-align: center;
      box-shadow: var(--qq-shadow-modal);
    }
    .logo { font-size: 48px; margin-bottom: 12px; }
    .brand { font-size: 18px; font-weight: 700; color: var(--qq-text); margin-bottom: 4px; }
    .sub   { font-size: 13px; color: var(--qq-text-muted); margin-bottom: 32px; }
    .btn-google {
      display: flex; align-items: center; justify-content: center; gap: 12px;
      width: 100%; padding: 14px; border: 1px solid var(--qq-border);
      background: var(--qq-bg-input); color: var(--qq-text); border-radius: 12px;
      font-size: 15px; font-weight: 500; cursor: pointer;
      text-decoration: none; transition: background .15s;
    }
    .btn-google:hover { background: var(--qq-bg-hover); }
    .btn-google img { width: 20px; height: 20px; }
    .error { background: var(--qq-danger-tint); border: 1px solid var(--qq-danger-border); border-radius: 10px; padding: 12px 16px; font-size: 13px; color: var(--qq-danger); margin-bottom: 20px; }
    .footer { font-size: 11px; color: var(--qq-text-muted); margin-top: 24px; }
    .legal-note { font-size: 11px; color: var(--qq-text-tertiary); margin-top: 18px; line-height: 1.7; }
    .legal-note a { color: var(--qq-text-tertiary); text-decoration: underline; }
    .legal-note a:hover { color: var(--qq-primary); }