:root{color-scheme:dark;--bg: #1a1c20;--panel: #24272e;--panel-alt: #2c2f37;--border: #383c45;--text: #e6e8eb;--text-dim: #9a9ea7;--accent: #5b8def;--accent-dim: #3a5a99;--danger: #e0555a;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}*{box-sizing:border-box}html,body,#root{margin:0;height:100%;background:var(--bg);color:var(--text)}.app{display:grid;grid-template-columns:320px 1fr;height:100vh;width:100vw;overflow:hidden}.sidebar{background:var(--panel);border-right:1px solid var(--border);padding:16px;overflow-y:auto;display:flex;flex-direction:column;gap:18px}.viewport{position:relative}.section{display:flex;flex-direction:column;gap:8px}.section h3{margin:0 0 4px;font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:var(--text-dim)}.row{display:flex;align-items:center;gap:8px}.row label{flex:1;font-size:13px;color:var(--text-dim)}input[type=number],select{background:var(--panel-alt);border:1px solid var(--border);color:var(--text);border-radius:6px;padding:6px 8px;font-size:13px;width:100px}select{width:100%}button{background:var(--accent);color:#fff;border:none;border-radius:6px;padding:8px 12px;font-size:13px;cursor:pointer;font-weight:500}button:hover{filter:brightness(1.08)}button:disabled{background:var(--panel-alt);color:var(--text-dim);cursor:not-allowed}button.secondary{background:var(--panel-alt);border:1px solid var(--border);color:var(--text)}.piece-list{display:flex;flex-direction:column;gap:4px;max-height:260px;overflow-y:auto}.piece-item{display:flex;align-items:center;gap:8px;padding:6px 8px;border-radius:6px;background:var(--panel-alt);font-size:12px}.piece-item .swatch{width:10px;height:10px;border-radius:2px;flex-shrink:0}.piece-item .name{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.status{font-size:12px;color:var(--text-dim);min-height:32px;white-space:pre-wrap}.status.error{color:var(--danger)}.progress-bar{position:relative;height:16px;border-radius:8px;background:var(--panel-alt);border:1px solid var(--border);overflow:hidden;margin-top:6px}.progress-bar-fill{height:100%;background:var(--accent);transition:width .1s linear}.progress-bar-label{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;font-size:10px;color:var(--text)}.hint{font-size:11px;color:var(--text-dim);line-height:1.4}.dropzone{border:1px dashed var(--border);border-radius:8px;padding:24px 12px;text-align:center;font-size:13px;color:var(--text-dim);cursor:pointer}.dropzone:hover{border-color:var(--accent);color:var(--text)}