body {
    background-color: #253f57;
}

.header-brand-img {
    width: clamp(120px, 14vw, 180px);
    height: auto;
}

.system-desc {
    color: #e9eef5;
    opacity: 0.9;
    font-size: 0.95rem;
    margin-top: 0.5rem;
}