html, body {
    max-width: 100%;
    overflow-x: hidden;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
*, *::before, *::after {
    box-sizing: inherit;
}
#mobile-menu {
    max-height: 0;
    overflow: hidden;
    transition: all 0.4s ease-in-out;
    opacity: 0;
}
#mobile-menu.open {
    max-height: 400px;
    opacity: 1;
}

/* Masaüstü Aktif Link Efekti */
.nav-link {
    position: relative;
    transition: color 0.3s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 0;
    background-color: #2563eb; /* blue-600 */
    transition: width 0.3s ease;
}

.nav-link.active {
    color: #2563eb !important;
}

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

/* Mobil Aktif Link Efekti */
.mobile-active {
    background-color: #eff6ff; /* blue-50 */
    color: #2563eb !important;
    border-left: 4px solid #2563eb !important;
    padding-left: 1rem !important;
}