:root{--bg: #f5f5f7;--card: #fff;--line: #d9d9de;--ink: #1d1d1f;--ink2: #6e6e73;--accent: #0b6bcb;--ok: #1a7f37;--warn: #b26a00;--radius: 14px}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.5 system-ui,-apple-system,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;-webkit-text-size-adjust:100%}.wrap{max-width:900px;margin:0 auto;padding:16px}h1{font-size:1.35rem;margin:8px 0 4px}h2{font-size:1.1rem;margin:20px 0 8px}p.sub{color:var(--ink2);margin:0 0 16px}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:0 20px;border:0;border-radius:12px;background:var(--accent);color:#fff;font-size:1rem;cursor:pointer}.btn.secondary{background:#fff;color:var(--ink);border:1px solid var(--line)}.btn[disabled]{opacity:.45;cursor:default}.row{display:flex;gap:12px;flex-wrap:wrap}.muted{color:var(--ink2);font-size:.875rem}.chart{border-collapse:separate;border-spacing:0}.chart th.axis{font-weight:500;font-size:10px;color:var(--ink2);padding:0;width:18px}.chart .cell{display:flex;align-items:center;justify-content:center;font-family:ui-monospace,Menlo,Consolas,monospace;font-weight:700;letter-spacing:-.5px;border:1px solid rgba(128,128,128,.28)}.chart .cell.empty{background:#fafafb;border-color:#eeeef0}.chart .blk-r{border-right:3px solid #1d1d1f!important}.chart .blk-b{border-bottom:3px solid #1d1d1f!important}.usage{display:flex;align-items:center;gap:8px;padding:3px 0;font-size:.9rem}.usage .swatch{width:15px;height:15px;border-radius:4px;border:1px solid rgba(128,128,128,.4)}.usage .grow{flex:1}.words{display:flex;flex-wrap:wrap;gap:8px}.words .btn{min-height:44px;padding:0 14px;font-size:.95rem}.btn.on{border-color:var(--accent);color:var(--accent);background:#eef5fd;font-weight:600}.source{cursor:pointer;margin-bottom:10px}.source.on{border-color:var(--accent);background:#eef5fd}.source .label{font-weight:600}.pickgrid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.pickgrid .item{border-radius:12px;overflow:hidden;background:#e9e9ec;aspect-ratio:1;cursor:pointer}.pickgrid .item img{width:100%;height:100%;object-fit:cover;display:block}.pickgrid .item.picked{outline:3px solid var(--accent)}.pickgrid .item.broken{opacity:.35;cursor:default}.prow{display:flex;align-items:center;gap:8px;padding:4px 0}.prow .swatch{width:22px;height:22px;border-radius:5px;border:1px solid rgba(128,128,128,.45)}.prow input.code{width:72px;min-height:36px;font-family:ui-monospace,Menlo,Consolas,monospace;border:1px solid var(--line);border-radius:8px;padding:0 8px;background:#fff}.prow input.code.low{border-color:var(--warn);background:#fff7e6}