:root{--ink: #1f2430;--ink-soft: #5a6172;--paper: #faf7f0;--panel: #ffffff;--bg: #efeae0;--accent: #8a4f24;--accent-soft: #f3e4d4;--line: #e3ddd0;--radius: 14px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,sans-serif}*{box-sizing:border-box}html,body{margin:0;padding:0;background:var(--bg);color:var(--ink)}.topbar{display:flex;align-items:center;justify-content:space-between;padding:14px 22px;background:var(--ink);color:#fff;position:sticky;top:0;z-index:10}.brand{display:flex;align-items:baseline;gap:10px}.brand-mark{font-size:26px;color:#e8b87f}.brand-name{font-size:20px;font-weight:700;letter-spacing:.4px}.brand-tag{font-size:12.5px;opacity:.75}.layout{display:grid;grid-template-columns:300px 1fr;gap:18px;padding:18px 22px;max-width:1280px;margin:0 auto}.panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px;height:fit-content;position:sticky;top:76px}.panel-section{margin-bottom:22px}.panel h2{font-size:11.5px;text-transform:uppercase;letter-spacing:1.2px;color:var(--ink-soft);margin:0 0 10px}.piece-list{display:flex;flex-direction:column;gap:8px;margin-bottom:8px}.import-cta{border-style:dashed!important;color:var(--accent);background:transparent!important}.import-cta .t{color:var(--accent)}.import-cta.slim{padding:6px 12px;text-align:center}.piece-card.imported{position:relative}.piece-card .mini{position:absolute;top:8px;right:10px;border:none;background:none;color:var(--ink-soft);font-size:11px;cursor:pointer;text-decoration:underline}.part-pick{display:block;margin-top:8px;font-size:12px;color:var(--ink-soft)}.part-pick select{font:inherit;margin-left:6px;max-width:160px}.warn{background:#fdf3df;border:1px solid #ecd9ae;color:#7a5b22;border-radius:9px;padding:8px 12px;font-size:13px;margin-bottom:8px}.warn.error{background:#fbe9e7;border-color:#eccac4;color:#93392c}.piece-card{text-align:left;border:1px solid var(--line);border-radius:10px;background:#fff;padding:10px 12px;cursor:pointer;font:inherit;transition:border-color .15s,background .15s}.piece-card:hover{border-color:var(--accent)}.piece-card.active{border-color:var(--accent);background:var(--accent-soft)}.piece-card .t{font-weight:650;font-size:14px;display:block}.piece-card .c{font-size:12px;color:var(--ink-soft)}.segmented{display:grid;grid-template-columns:1fr 1fr;gap:6px}.segmented button{border:1px solid var(--line);background:#fff;border-radius:9px;padding:8px 6px;font:inherit;font-size:13px;font-weight:600;cursor:pointer;color:var(--ink-soft)}.segmented button.active{background:var(--ink);color:#fff;border-color:var(--ink)}.hint{font-size:12px;color:var(--ink-soft);margin:10px 2px 0;line-height:1.45}.report{display:grid;grid-template-columns:1fr 1fr;gap:8px}.stat{background:var(--paper);border:1px solid var(--line);border-radius:9px;padding:8px 10px}.stat .v{font-size:17px;font-weight:700}.stat 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760px){.layout{grid-template-columns:1fr;padding:12px}.panel{position:static;order:2}.stage{order:1}.brand-tag{display:none}.segmented{grid-template-columns:1fr 1fr}}