body {
            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .login-container {
            background: white;
            border-radius: 20px;
            padding: 40px;
            box-shadow: 0 20px 60px rgba(0,0,0,0.3);
            width: 100%;
            max-width: 420px;
        }
        .login-container .logo {
            text-align: center;
            margin-bottom: 30px;
        }
        .login-container .logo i {
            font-size: 48px;
            color: #667eea;
        }
        .login-container .logo h3 {
            margin-top: 10px;
            color: #1a1a2e;
            font-weight: 700;
        }
        .login-container .logo p {
            color: #6c757d;
            font-size: 14px;
        }
        .form-control {
            border-radius: 10px;
            padding: 12px 15px;
        }
        .form-control:focus {
            border-color: #667eea;
            box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
        }
        .btn-login {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            border: none;
            padding: 12px;
            font-weight: 600;
            color: white;
            border-radius: 10px;
            width: 100%;
            transition: all 0.3s;
        }
        .btn-login:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
        }
        .alert {
            border-radius: 10px;
        }
        .security-badge {
            font-size: 12px;
            color: #6c757d;
            text-align: center;
            margin-top: 20px;
        }
        .security-badge i {
            color: #28a745;
        }