body {
            font-family: Arial, sans-serif;
            background-color: #f7f7f7;
            margin: 0;
            padding: 0;
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
            padding: 20px 0;
        }

        .container {
            max-width: 700px;
            width: 100%;
            margin: 20px;
            padding: 30px;
            border: 1px solid #ddd;
            border-radius: 8px;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
            background-color: #fff;
        }

        h1,
        h2 {
            color: #333;
            text-align: center;
            margin-top: 0;
        }

        h1 {
            font-size: 28px;
            margin-bottom: 10px;
        }

        .subtitle {
            text-align: center;
            color: #666;
            margin-bottom: 30px;
            font-size: 14px;
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 8px;
            color: #333;
            font-size: 14px;
        }

        .form-group .hint {
            font-size: 12px;
            color: #666;
            font-weight: 400;
            margin-top: 5px;
            line-height: 1.4;
        }

        .form-group input[type="text"],
        .form-group input[type="password"],
        .form-group input[type="url"] {
            width: 100%;
            padding: 10px;
            border: 1px solid #ccc;
            border-radius: 4px;
            box-sizing: border-box;
            font-size: 14px;
        }

        .form-group input:focus {
            outline: none;
            border-color: #667eea;
        }

        .optional-label {
            display: inline-block;
            background: #f0f0f0;
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 11px;
            margin-left: 8px;
            color: #666;
            font-weight: 400;
        }

        .error-box {
            background: #fee;
            border: 1px solid #fcc;
            color: #c33;
            padding: 12px 15px;
            border-radius: 4px;
            margin-bottom: 20px;
            font-size: 14px;
        }

        .error-list {
            margin: 10px 0 0 0;
            padding-left: 20px;
        }

        .error-list li {
            margin: 5px 0;
        }

        .health-check-box {
            background: #fff3cd;
            border: 1px solid #ffeaa7;
            padding: 15px;
            border-radius: 4px;
            margin-bottom: 20px;
        }

        .health-check-box h3 {
            margin-top: 0;
            margin-bottom: 10px;
            color: #856404;
            font-size: 16px;
        }

        .health-item {
            display: flex;
            align-items: center;
            padding: 5px 0;
            font-size: 13px;
        }

        .health-item .status {
            margin-right: 10px;
            font-size: 16px;
        }

        .status-ok {
            color: #28a745;
        }

        .status-fail {
            color: #dc3545;
        }

        button[type="submit"] {
            width: 100%;
            padding: 12px;
            background-color: #28a745;
            color: white;
            border: none;
            border-radius: 4px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
        }

        button[type="submit"]:hover {
            background-color: #218838;
        }

        .license-info {
            background: #e7f3ff;
            border: 1px solid #b3d9ff;
            padding: 12px 15px;
            border-radius: 4px;
            margin-bottom: 20px;
            font-size: 13px;
        }

        .license-key-box {
            margin-bottom: 16px;
            padding: 10px 14px;
            border-radius: 4px;
            border: 1px solid #dce3ef;
            background: #f5f7fb;
            font-size: 13px;
            color: #2f3b4b;
        }

        .license-key-label {
            font-weight: 600;
            margin-right: 6px;
        }

        .license-key-value {
            font-family: monospace;
            word-break: break-all;
        }

        .license-info>strong {
            display: block;
            margin-bottom: 5px;
            color: #004085;
        }

        .license-features strong {
            display: inline;
            color: #004085;
        }

        .license-features {
            list-style: none;
            padding: 0;
            margin: 5px 0 0 0;
        }

        .license-features li {
            padding: 3px 0;
            color: #004085;
        }

        .license-features li:before {
            content: "✓ ";
            color: #28a745;
            font-weight: bold;
            margin-right: 5px;
        }

        .password-wrapper {
            position: relative;
            display: flex;
            align-items: center;
        }

        .password-wrapper input {
            padding-right: 40px !important;
        }

        .toggle-password {
            position: absolute;
            right: 8px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 4px;
            color: #999;
            display: flex;
            align-items: center;
            width: auto;
        }

        .toggle-password:hover {
            color: #555;
        }