body {
            font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
            margin: 0;
            padding: 14px;
            background: radial-gradient(circle at top, #e0f2ff 0, #b9e6ff 40%, #e0f2ff 100%);
          }
          .container {
            max-width: 520px;
            margin: 40px auto;
          }
          .card {
            background: #fff;
            border-radius: 14px;
            padding: 22px;
            border: 1px solid rgba(15, 23, 42, 0.08);
            box-shadow: 0 10px 28px rgba(15, 23, 42, 0.10);
          }
          .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            justify-content: center;
            margin-bottom: 12px;
          }
          .brand-logo {
            height: 40px;
          }
          h1 {
            margin-top: 0;
            margin-bottom: 16px;
          }
          .form-row {
            display: flex;
            flex-direction: column;
            margin-bottom: 12px;
          }
          label {
            font-size: 14px;
            margin-bottom: 4px;
          }
          input[type="text"],
          input[type="password"] {
            padding: 8px 10px;
            border-radius: 4px;
            border: 1px solid #d0d5dd;
            font-size: 14px;
          }
          button {
            padding: 8px 14px;
            border-radius: 4px;
            border: none;
            background: #2563eb;
            color: #fff;
            font-size: 14px;
            cursor: pointer;
            width: 100%;
          }
          button:hover {
            background: #1d4ed8;
          }
          .alert {
            padding: 10px 12px;
            border-radius: 4px;
            font-size: 14px;
            margin-bottom: 12px;
          }
          .alert.error {
            background: #fef2f2;
            color: #b91c1c;
            border: 1px solid #fecaca;
          }
          .helper {
            margin-top: 12px;
            font-size: 13px;
            color: #6b7280;
          }