body {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            display: flex;
            align-items: center;
        }
        .login-container {
            max-width: 400px;
            width: 90%;
            margin: auto;
            padding: 15px;
        }
        .card {
            border: none;
            border-radius: 15px;
            box-shadow: 0 10px 20px rgba(0,0,0,0.19), 0 6px 6px rgba(0,0,0,0.23);
            overflow: hidden;
            transition: all 0.3s ease;
        }
        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.25), 0 10px 10px rgba(0,0,0,0.22);
        }
        .card-body {
            padding: 2rem;
        }
        .card-title {
            color: #333;
            font-weight: 700;
            margin-bottom: 2rem;
            position: relative;
        }
        .card-title:after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 50px;
            height: 3px;
            background: linear-gradient(to right, #667eea, #764ba2);
            border-radius: 3px;
        }
        .form-control {
            border-radius: 10px;
            padding: 12px;
            border: 2px solid #eee;
            transition: all 0.3s ease;
        }
        .form-control:focus {
            border-color: #667eea;
            box-shadow: 0 0 0 0.2rem rgba(102,126,234,0.25);
        }
        .input-group {
            position: relative;
        }
        .input-icon {
            position: absolute;
            right: 15px;
            top: 50%;
            transform: translateY(-50%);
            color: #999;
            cursor: pointer;
            z-index: 4;
        }
        .btn-login {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            border: none;
            border-radius: 10px;
            padding: 12px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1px;
            transition: all 0.3s ease;
        }
        .btn-login:hover {
            transform: translateY(-2px);
            box-shadow: 0 7px 14px rgba(0,0,0,0.18), 0 5px 5px rgba(0,0,0,0.12);
        }
        .alert {
            border-radius: 10px;
            animation: slideIn 0.5s ease-out;
        }
        @keyframes slideIn {
            from {
                transform: translateY(-20px);
                opacity: 0;
            }
            to {
                transform: translateY(0);
                opacity: 1;
            }
        }
        .form-label {
            font-weight: 600;
            color: #555;
        }
        @media (max-width: 576px) {
            .login-container {
                width: 100%;
                padding: 10px;
            }
            .card-body {
                padding: 1.5rem;
            }
        }