/* 로고 */
.logo {
    width: 100px;
    height: 100px;
    margin: 0 auto 20px;
    position: relative;
}

.circle {
    width: 100%;
    height: 100%;
    border: 3px solid rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    box-shadow: 0 0 20px #5bc0ff, 0 0 60px rgba(91, 192, 255, 0.4);
}

.slash {
    position: absolute;
    width: 180%;
    height: 2px;
    background: linear-gradient(90deg, transparent, #5bc0ff, transparent);
    top: 50%;
    left: -40%;
    transform: rotate(45deg);
    box-shadow: 0 0 20px #5bc0ff;
}