:root { --grid-min-width: 720px; }
*{box-sizing:border-box}
body{font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;margin:16px;background:#fafafa;color:#111}
h1{margin:0 0 8px}.meta{font-size:12px;color:#666;margin:8px 0 16px}
.table-wrap{max-width:100%;overflow:auto;background:#fff;border:1px solid #ddd;border-radius:12px;box-shadow:0 2px 6px rgba(0,0,0,.04)}
table{border-collapse:collapse;width:100%;min-width:var(--grid-min-width)}
th,td{border:1px solid #e3e3e3;padding:8px 10px;vertical-align:top;background:#fff}
th{background:#f7f7f7;text-align:left;position:sticky;top:0;z-index:1}
caption{caption-side:top;text-align:left;font-weight:600;margin:8px 8px 0}
.toolbar{display:flex;gap:8px;align-items:center;margin:0 0 12px;flex-wrap:wrap}
button,input[type=submit],.btn{padding:8px 12px;border-radius:10px;border:1px solid #ccc;background:#fff;cursor:pointer;text-decoration:none;color:inherit;display:inline-block}
button:hover,input[type=submit]:hover,.btn:hover{background:#f3f3f3}
.notice{padding:8px 12px;border-left:4px solid #2c7be5;background:#e8f0fe;border-radius:6px;margin:12px 0}
.code{font-family:ui-monospace,Menlo,Monaco,Consolas,monospace;font-size:12px;background:#f5f5f5;padding:2px 6px;border-radius:6px}
.cell-editable{background:#fffbe6}.footer{margin-top:16px;color:#666;font-size:12px}
.select{padding:8px;border-radius:10px;border:1px solid #ccc;background:#fff}