:root { color-scheme: dark; }
* { -webkit-tap-highlight-color: transparent; }
body { margin: 0; }
.msg-scroll::-webkit-scrollbar { width: 10px; height: 10px; }
.msg-scroll::-webkit-scrollbar-thumb { background: rgba(255,255,255,.1); border-radius: 6px; }
.msg-scroll::-webkit-scrollbar-track { background: transparent; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
@keyframes spin { to { transform: rotate(360deg); } }
.spin { animation: spin .8s linear infinite; }