.header {
    backdrop-filter: blur(8px);
    transition: background-color 0.3s ease;
}

.nav-link {
    position: relative;
    transition: color 0.3s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    width: 0;
    height: 2px;
    background: #0099cc;
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-link.active::after {
    width: 100%;
}

.mobile-menu {
    transition: max-height 0.3s ease;
}

.logo {
    transition: transform 0.3s ease;
}

.logo:hover {
    transform: scale(1.05);
}