#postcard .postcard-message-disclosure { max-width:640px; margin:0 auto 24px; }
#postcard .postcard-message-disclosure>summary { display:none; min-height:44px; padding:10px 0; font-size:var(--type-control); cursor:pointer; }
#postcard .postcard-message-disclosure .postcard-message { width:100%; max-width:none; margin:0; }
#postcard .postcard-message-assist { display:flex; flex-direction:column; align-items:start; gap:8px; margin-top:10px; }
#postcard .postcard-message-assist p { margin:0; font-size:var(--type-caption); }
#postcard .postcard-message-assist button { max-width:100%; }
#postcard .postcard-canvas-frame { position:relative; width:100%; aspect-ratio:16/9; overflow:hidden; border:1px solid var(--line); border-radius:16px; background:var(--ink); }
#postcard .postcard-canvas-frame #postcard-canvas { position:absolute; inset:0; width:100%; height:100%; aspect-ratio:auto; border:0; border-radius:0; object-fit:contain; }
#postcard .postcard-view-controls { display:flex; justify-content:center; align-items:center; flex-wrap:wrap; gap:4px; margin-top:8px; }
#postcard .postcard-view-controls[hidden] { display:none !important; }
#postcard .postcard-view-controls .ui-icon-button { width:44px; min-width:44px; height:44px; }
#postcard #postcard-view-scale { min-width:44px; text-align:center; font-size:var(--type-caption); font-variant-numeric:tabular-nums; }
#postcard .postcard-view-pan { display:contents; }
#postcard .is-expanded .postcard-message-disclosure { width:min(100%,800px); max-width:none; margin:0 auto; flex-shrink:0; }
#postcard .is-expanded .postcard-message-disclosure>summary { display:list-item; margin-left:16px; }
#postcard .is-expanded .postcard-stage { min-height:320px; }
#postcard .is-expanded .postcard-canvas-frame { flex:1; height:0; min-height:160px; aspect-ratio:auto; }
#postcard .is-expanded .postcard-view-controls { flex-shrink:0; }
#postcard .is-expanded .postcard-editor-heading { position:sticky; top:0; z-index:5; padding-block:4px; background:var(--ink); }
#postcard .is-expanded .postcard-help { display:block; }
@media(max-width:520px) { #postcard .postcard-canvas-frame { border-radius:10px; } }