/* ── Letterbox ── */
.lb{position:fixed;left:0;right:0;height:52px;background:#000;z-index:9998}
.lb-t{top:0;animation:lb-t .95s cubic-bezier(.16,1,.3,1) .15s forwards}
.lb-b{bottom:0;animation:lb-b .95s cubic-bezier(.16,1,.3,1) .15s forwards}
@keyframes lb-t{to{transform:translateY(-100%)}}
@keyframes lb-b{to{transform:translateY(100%)}}