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

        .login-container {
            max-width: 450px;
            width: 100%;
            padding: 20px;
        }

        .login-card {
            background: rgba(255, 255, 255, 0.95);
            border-radius: 20px;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
            overflow: hidden;
            backdrop-filter: blur(10px);
        }

        .login-header {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 40px 30px;
            text-align: center;
        }

        .login-header i {
            font-size: 60px;
            margin-bottom: 15px;
            animation: bounce 2s infinite;
        }

        @keyframes bounce {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-10px); }
        }

        .login-header h2 {
            font-size: 28px;
            font-weight: 700;
            margin: 0;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
        }

        .login-header p {
            font-size: 14px;
            margin: 8px 0 0 0;
            opacity: 0.95;
        }

        .login-body {
            padding: 40px 30px;
        }

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

        .form-control {
            border-radius: 12px;
            border: 2px solid #e0e0e0;
            padding: 12px 15px;
            font-size: 15px;
            transition: all 0.3s ease;
        }

        .form-control:focus {
            border-color: #667eea;
            box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.15);
        }

        .input-group-text {
            background: transparent;
            border: 2px solid #e0e0e0;
            border-right: none;
            border-radius: 12px 0 0 12px;
            color: #667eea;
        }

        .input-group .form-control {
            border-left: none;
            border-radius: 0 12px 12px 0;
        }

        .input-group:focus-within .input-group-text {
            border-color: #667eea;
        }

        .btn-login {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            border: none;
            border-radius: 12px;
            padding: 14px;
            font-size: 16px;
            font-weight: 600;
            color: white;
            width: 100%;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
        }

        .btn-login:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
        }

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

        .alert {
            border-radius: 12px;
            border: none;
            padding: 12px 15px;
            margin-bottom: 20px;
            display: none;
        }

        .alert-danger {
            background-color: #ffe6e6;
            color: #d63031;
        }

        .alert-success {
            background-color: #e6ffe6;
            color: #00b894;
        }

        .loading-spinner {
            display: none;
            margin-left: 10px;
        }

        .form-check-label {
            font-size: 14px;
            color: #666;
        }

        .login-footer {
            text-align: center;
            padding: 20px 30px 30px;
            color: #999;
            font-size: 13px;
        }

        @media (max-width: 576px) {
            .login-container {
                padding: 10px;
            }
            
            .login-body {
                padding: 30px 20px;
            }
        }