* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            background-color: #1a1a1a;
            color: #ffffff;
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
            padding: 20px;
        }

        .login-container {
            background-color: #2a2a2a;
            border-radius: 8px;
            padding: 40px;
            width: 100%;
            max-width: 400px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
        }

        .login-header {
            text-align: center;
            margin-bottom: 30px;
        }

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

        .login-header p {
            color: #888;
            font-size: 14px;
        }

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

        label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
            font-size: 14px;
            color: #ccc;
        }

        input[type="text"],
        input[type="password"] {
            width: 100%;
            padding: 12px;
            background-color: #1a1a1a;
            border: 1px solid #444;
            border-radius: 4px;
            color: #fff;
            font-size: 16px;
            transition: border-color 0.2s;
        }

        input[type="text"]:focus,
        input[type="password"]:focus {
            outline: none;
            border-color: #4CAF50;
        }

        .checkbox-group {
            display: flex;
            align-items: center;
            margin-bottom: 25px;
        }

        .checkbox-group input[type="checkbox"] {
            margin-right: 8px;
        }

        .checkbox-group label {
            margin-bottom: 0;
            font-weight: normal;
            cursor: pointer;
        }

        .btn-login {
            width: 100%;
            padding: 12px;
            background-color: #4CAF50;
            color: white;
            border: none;
            border-radius: 4px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: background-color 0.2s;
        }

        .btn-login:hover {
            background-color: #45a049;
        }

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

        .alert {
            padding: 12px;
            border-radius: 4px;
            margin-bottom: 20px;
            font-size: 14px;
        }

        .alert-error {
            background-color: #f44336;
            color: white;
        }

        .alert-success {
            background-color: #4CAF50;
            color: white;
        }

        .footer-links {
            margin-top: 30px;
            text-align: center;
            font-size: 14px;
        }

        .footer-links a {
            color: #4CAF50;
            text-decoration: none;
        }

        .footer-links a:hover {
            text-decoration: underline;
        }

        .security-notice {
            margin-top: 20px;
            padding: 15px;
            background-color: #1a1a1a;
            border-radius: 4px;
            font-size: 12px;
            color: #888;
            text-align: center;
        }

        .security-notice .lock-icon {
            font-size: 16px;
            color: #4CAF50;
            margin-right: 5px;
        }