body, html {
            height: 100%;
            margin: 0;
            font-family: 'Noto Sans KR', sans-serif;
        }
        .bg {
            height: 100%;
            background: linear-gradient(-45deg, #ee7752, #e73c7e, #23a6d5, #23d5ab);
            background-size: 400% 400%;
            animation: gradient 15s ease infinite;
        }
        @keyframes gradient {
            0% {background-position: 0% 50%;}
            50% {background-position: 100% 50%;}
            100% {background-position: 0% 50%;}
        }
        .login-container {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background: rgba(255, 255, 255, 0.9);
            padding: 50px 70px;
            border-radius: 10px;
            box-shadow: 0 0 20px rgba(0, 0, 0, 0.2);
            width: 420px;
        }
        .logo {
            text-align: center;
            margin-bottom: 30px;
        }
        .logo img {
            max-width: 200px;
            height: auto;
            display: block;
            margin: 0 auto;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-control {
            height: auto;
            padding: 8px 12px;
            font-size: 14px;
        }
        .btn-login {
            width: 100%;
            padding: 10px;
            font-size: 16px;
        }
        .form-label {
            font-size: 14px;
            margin-bottom: 5px;
        }

        @media (max-width: 480px) {
            .login-container {
                width: 90%;
                padding: 30px;
                max-width: 360px;
            }
            .logo img {
                max-width: 180px;
            }
            .form-control {
                font-size: 16px;
            }
            .btn-login {
                font-size: 18px;
                padding: 12px;
            }
        }