.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--background);
    border-bottom: 1px solid var(--border);
    padding: 12px 0;
    transition: transform var(--dauer-4) ease;
    will-change: transform;
    font-size: 16px;
}
@media print {
body:has(.kasse-buchungsliste) .site-header { display: none !important; }
}
@media print {
.site-header { position: static !important; transform: none !important; }
}