select[name=arrival] .time-am,select[name=checkin] .time-am{background:#e8f3ff;color:#124b7a}
select[name=arrival] .time-pm,select[name=checkin] .time-pm{background:#fff0e2;color:#853500}
select[data-time-period=am]{background:#e8f3ff;color:#124b7a;border-color:#367cb5}
select[data-time-period=pm]{background:#fff0e2;color:#853500;border-color:#bb6426}
.time-period-key{display:flex;flex-wrap:wrap;gap:8px;font-size:.8rem;font-weight:650;margin-top:6px}
.time-period-key span{display:inline-block;border-radius:6px;padding:3px 9px}
.time-period-key .time-am{background:#e8f3ff;color:#124b7a}
.time-period-key .time-pm{background:#fff0e2;color:#853500}