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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }

        .login-container {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-radius: 20px;
            padding: 40px;
            width: 100%;
            max-width: 420px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.2);
            animation: slideIn 0.5s ease-out;
        }

        @keyframes slideIn {
            from {
                opacity: 0;
                transform: translateY(-20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

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

        .login-header h1 {
            color: #333;
            font-size: 28px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .login-header p {
            color: #666;
            font-size: 14px;
        }

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

        .form-group label {
            display: block;
            color: #555;
            font-weight: 500;
            margin-bottom: 8px;
            font-size: 14px;
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 2px solid #e1e5e9;
            border-radius: 10px;
            font-size: 16px;
            transition: all 0.3s ease;
            background-color: #fff;
        }

        .form-control:focus {
            outline: none;
            border-color: #667eea;
            box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
        }

        .form-control:hover {
            border-color: #c1c7d6;
        }

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

        .checkbox-group input[type="checkbox"] {
            width: 18px;
            height: 18px;
            margin-right: 10px;
            cursor: pointer;
        }

        .checkbox-group label {
            font-size: 14px;
            color: #666;
            cursor: pointer;
            margin-bottom: 0;
        }

        .btn-login {
            width: 100%;
            padding: 12px 20px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border: none;
            border-radius: 10px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            margin-bottom: 20px;
        }

        .btn-login:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
        }

        .btn-login:active {
            transform: translateY(0);
        }

        .alert {
            padding: 12px 16px;
            border-radius: 8px;
            margin-bottom: 20px;
            font-size: 14px;
            animation: fadeIn 0.3s ease-out;
        }

        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(-10px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .alert-danger {
            background-color: #fff5f5;
            color: #c53030;
            border: 1px solid #fed7d7;
        }

        .alert-success {
            background-color: #f0fff4;
            color: #38a169;
            border: 1px solid #c6f6d5;
        }

        .form-icon {
            position: absolute;
            right: 12px;
            top: 50%;
            transform: translateY(-50%);
            color: #999;
            font-size: 18px;
        }

        .input-group {
            position: relative;
        }

        .password-toggle {
            position: absolute;
            right: 12px;
            top: 50%;
            transform: translateY(-50%);
            background: none;
            border: none;
            cursor: pointer;
            color: #666;
            font-size: 16px;
            padding: 0;
            width: 20px;
            height: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .password-toggle:hover {
            color: #333;
        }

        /* Responsive Design */
        @media (max-width: 480px) {
            .login-container {
                padding: 30px 20px;
                margin: 10px;
            }
            
            .login-header h1 {
                font-size: 24px;
            }
        }

        /* Loading state */
        .btn-login.loading {
            opacity: 0.7;
            cursor: not-allowed;
        }

        .btn-login.loading::after {
            content: '';
            display: inline-block;
            width: 16px;
            height: 16px;
            border: 2px solid #fff;
            border-radius: 50%;
            border-top-color: transparent;
            animation: spin 0.8s linear infinite;
            margin-left: 10px;
        }

        @keyframes spin {
            to {
                transform: rotate(360deg);
            }
        }