/* A separate editor: one fixed-ratio card for preview and PNG export. */
#postcard-dialog{width:min(1080px,calc(100% - 32px));max-width:1080px;max-height:calc(100vh - 32px);max-height:calc(var(--postcard-vh,100dvh) - 32px);padding:0;border:3px solid #8e74b0;border-radius:8px;background:var(--paper);color:var(--ink);overflow:hidden;box-shadow:6px 6px 0 #b9a4d0}
#postcard-dialog[open]{display:flex;flex-direction:column}
#postcard-dialog::backdrop{background:#38275970}
.postcard-header{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:16px 22px;border-bottom:1px solid #ded2eb;flex-shrink:0}
.postcard-header h2{font:24px/1.4 AlbumPixel,monospace;display:flex;align-items:center;gap:10px}
.postcard-header svg{width:24px;height:24px;flex:none}
#postcard-close{width:40px;height:40px;padding:0;border:0;background:transparent;font:28px/1 system-ui}
.postcard-editor{display:grid;grid-template-columns:minmax(0,1.8fr) minmax(250px,1fr);gap:24px;padding:24px;overflow:auto;min-height:0;align-items:start;overscroll-behavior:contain}
.postcard-preview{min-width:0;position:sticky;top:0;background:#eee8fb;padding:12px;border-radius:4px}
#postcard-canvas{display:block;width:100%;height:auto;aspect-ratio:3/2;image-rendering:pixelated}
#postcard-loading{position:absolute;inset:12px;display:grid;place-items:center;background:#f7f2fc;font:14px/1.6 system-ui;text-align:center;padding:16px}
.postcard-form{display:flex;flex-direction:column;gap:15px;min-width:0}
.postcard-field{display:flex;flex-direction:column;gap:7px;font:12px/1.5 AlbumPixel,monospace}
.postcard-label{display:flex;align-items:center;justify-content:space-between;gap:8px}
#postcard-counter{font:12px/1.4 system-ui;color:#77648d}
.postcard-field input,.postcard-field textarea{box-sizing:border-box;width:100%;min-width:0;padding:10px 12px;background:#fff;border:1px solid #cbb9df;border-radius:4px;color:var(--ink);font:16px/1.7 AlbumPixel,monospace;outline-offset:2px}
.postcard-field input{min-height:44px}
.postcard-field textarea{min-height:150px;resize:vertical}
.postcard-field input:focus-visible,.postcard-field textarea:focus-visible{outline:2px solid #8e74b0;border-color:#8e74b0}
.postcard-customize{display:flex;flex-direction:column;gap:12px}
.postcard-palette,.postcard-stamps{display:flex;gap:8px;align-items:center}
.postcard-palette button{width:36px;height:36px;border:4px solid var(--paper);box-shadow:0 0 0 1px #cbb9df;border-radius:50%;padding:0}
.postcard-palette button[aria-pressed=true]{outline:2px solid #76529c;outline-offset:2px}
.postcard-stamps button{flex:1;min-height:40px;border:1px solid #cbb9df;border-radius:4px;background:#f5effb;font:12px AlbumPixel,monospace}
.postcard-stamps [aria-pressed=true]{background:var(--mint);border-color:var(--mint-line)}
#postcard-error{font:13px/1.5 system-ui;color:#913d55;margin:0;min-height:0}
#postcard-error[data-kind=success]{color:#527565}
.postcard-footer{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 24px;border-top:1px solid #ded2eb;background:var(--paper);flex-shrink:0}
.postcard-footer button{min-height:44px;border:1px solid #b9a5d0;border-radius:4px;padding:8px 16px;font:14px AlbumPixel,monospace;background:#f7f2fc}
#postcard-save{background:#6e538e;color:#fff;border-color:#6e538e;display:flex;align-items:center;justify-content:center;gap:8px}
#postcard-save svg{width:20px;height:20px}
#postcard-save:disabled{opacity:.5}
#postcard-open svg{width:29px;height:29px}
@media(max-width:800px) and (orientation:portrait){
 .mobile-nav{grid-template-columns:repeat(4,minmax(0,1fr));gap:5px}
 .mobile-nav button{font-size:12px;padding:5px 2px}
 #postcard-dialog{width:calc(100% - 16px);max-height:calc(100vh - 16px);max-height:calc(var(--postcard-vh,100dvh) - 16px);top:var(--postcard-top,0px);bottom:auto;margin:8px auto;border-width:2px;box-shadow:3px 3px 0 #b9a4d0}
 .postcard-header{padding:8px 12px}.postcard-header h2{font-size:18px;gap:7px}.postcard-header svg{width:20px;height:20px}
 .postcard-editor{display:flex;flex-direction:column;gap:16px;padding:12px;overflow:auto}
 .postcard-preview{position:relative;top:auto;width:100%;padding:6px;flex-shrink:0}
 .postcard-form{width:100%;gap:12px}.postcard-field textarea{min-height:112px;resize:none}
 .postcard-customize{flex-direction:row;align-items:center;justify-content:space-between;gap:12px}
 .postcard-palette{gap:7px}.postcard-palette button{height:30px;width:30px}.postcard-stamps{flex:1;max-width:180px;gap:5px}
 .postcard-footer{padding:10px 12px max(10px,env(safe-area-inset-bottom));gap:8px}.postcard-footer button{font-size:12px;padding:8px 10px}.postcard-footer #postcard-save{flex:1}
}