:root { font-family: ui-sans-serif, system-ui, sans-serif; --bg:#f6f1e8; --ink:#1c140c; --red:#9b1c1c; --line:#e2d3bf; }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); }
.top { display: flex; justify-content: space-between; align-items: center; padding: 12px 20px; background: #3b0f0f; color: #fff; }
.top a { color: #fff; text-decoration: none; margin-left: 12px; }
.brand { font-weight: 700; }
main { max-width: 1100px; margin: 0 auto; padding: 24px; }
.board-page { display: grid; grid-template-columns: 1.4fr 0.8fr; gap: 24px; }
.board-wrap { position: relative; background: #fff; border: 1px solid var(--line); }
.board-wrap img, .board-img { width: 100%; display: block; }
.sold-x { position: absolute; transform: translate(-50%,-50%); background: #9b1c1c; color: #fff; font-size: 12px; padding: 2px 6px; text-align: center; white-space: nowrap; }
.sold-x.reserved { background: #b45309; }
aside, .prose { background: #fff; border: 1px solid var(--line); padding: 16px; }
label { display: block; margin: 12px 0; }
input, select { width: 100%; padding: 8px; margin-top: 4px; }
button, .btn { display: inline-block; background: var(--red); color: #fff; border: 0; padding: 8px 14px; text-decoration: none; cursor: pointer; }
.err { color: var(--red); }
.flash { color: var(--red); }
.tap-board { cursor: crosshair; }
.qr svg { width: 220px; height: 220px; display: block; }
.qr-img { width: 220px; height: auto; display: block; background: #fff; }
.proof-img { max-width: 100%; height: auto; display: block; margin: 8px 0; border: 1px solid var(--line); }
input[type="radio"], input[type="file"] { width: auto; }