:root{--bg: #161616;--panel: #1e1e1e;--card: #262626;--line: #333;--text: #e8e8e8;--dim: #9a9a9a;--accent: #ff8a3d;--cool: #5b7fb8;--err: #ff6b6b;color-scheme:dark}*{box-sizing:border-box}html,body{margin:0;height:100%;background:var(--bg);color:var(--text);font:13px/1.4 system-ui,-apple-system,sans-serif}body{display:flex;flex-direction:column}body.drag .stage{outline:2px dashed var(--accent);outline-offset:-8px}button,select,input[type=number]{font:inherit;color:var(--text);background:var(--card);border:1px solid var(--line);border-radius:6px;padding:4px 9px}button{cursor:pointer}button:hover:not(:disabled){border-color:#555}button:disabled{opacity:.4;cursor:default}button.primary{background:var(--accent);border-color:var(--accent);color:#1a1a1a;font-weight:600}code{background:#2a2a2a;padding:0 4px;border-radius:3px}.hdr{display:flex;align-items:center;gap:8px;padding:8px 12px;border-bottom:1px solid var(--line);background:var(--panel);flex-wrap:wrap}.brand{font-weight:700;font-size:15px;margin-right:8px}.brand span{color:var(--accent)}.sep{width:1px;height:20px;background:var(--line)}.grow{flex:1}.status{color:var(--dim);text-align:right;font-variant-numeric:tabular-nums}button.icon{padding:1px 7px;min-width:26px}button.round{border-radius:50%;width:28px;height:28px;padding:0;font-weight:700}[title]{text-underline-offset:3px}.status.err{color:var(--err)}.main{flex:1;display:flex;min-height:0}.side{width:300px;flex:none;overflow-y:auto;overflow-x:hidden;border-right:1px solid var(--line);background:var(--panel);padding:4px 12px 24px}.side section{padding:10px 0;border-bottom:1px solid var(--line)}.side h2{font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--dim);margin:4px 0 8px}.file-info:empty{display:none}.fname{font-weight:600;word-break:break-all}.meta{color:var(--dim)}.warn{color:#ffcf6b;margin-top:4px}.hint{color:var(--dim)}.row{display:grid;grid-template-columns:1fr;gap:2px;margin:6px 0}.row label{display:flex;justify-content:space-between;color:var(--dim)}.row output{color:var(--text);font-variant-numeric:tabular-nums}.row.check{display:flex;align-items:center;gap:6px;color:var(--dim)}.row select,.row input[type=number]{width:100%}.row2{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:6px;margin-bottom:8px}.row2>*{min-width:0}input[type=range]{width:100%;accent-color:var(--accent)}.card{background:var(--card);border:1px solid var(--line);border-radius:8px;margin:8px 0}.card.off{opacity:.55}.card-head{display:flex;align-items:center;gap:6px;padding:6px 8px;border-bottom:1px solid var(--line)}.card-head button{padding:1px 7px}.card-head select{padding:1px 4px}.card-body{padding:2px 10px 6px}.stage-wrap{flex:1;display:flex;flex-direction:column;min-width:0}.stage{flex:1;position:relative;min-height:0;overflow:hidden}.stage canvas{display:block;width:100%;height:100%}.stage.picking canvas{cursor:crosshair}.empty{position:absolute;inset:0;display:grid;place-content:center;text-align:center;pointer-events:none;color:var(--dim);font-size:15px}.empty .hint{font-size:12px}.empty[hidden],[hidden]{display:none!important}.stage-bar{display:flex;align-items:center;gap:16px;padding:8px 12px;border-top:1px solid var(--line);background:var(--panel);flex-wrap:wrap}.seg{display:inline-flex}.seg button{border-radius:0}.seg button:first-child{border-radius:6px 0 0 6px}.seg button:last-child{border-radius:0 6px 6px 0;border-left:none}.seg button.on{background:#3a3a3a;border-color:#555}.layers{display:flex;align-items:center;gap:8px;color:var(--dim);flex:1;min-width:260px}.layers input{flex:1}.layers span{min-width:92px;font-variant-numeric:tabular-nums}.stats{color:var(--dim);font-variant-numeric:tabular-nums}@media (max-width: 760px){.main{flex-direction:column}.side{width:auto;max-height:45vh;border-right:none;border-bottom:1px solid var(--line)}.stage{min-height:320px}}.sec-head{display:flex;align-items:center;gap:4px}.sec-head h2{margin:4px 0 8px;cursor:help}.sec-head button{margin-bottom:4px}.side h2[title]{cursor:help}details.more{margin:6px 0 2px}details.more>summary{color:var(--dim);cursor:pointer;font-size:12px;list-style:none;user-select:none}details.more>summary:before{content:"▸ "}details.more[open]>summary:before{content:"▾ "}details.more[open]{padding-bottom:4px}details.more>button{margin-top:6px}dialog.help{max-width:560px;width:calc(100% - 32px);max-height:85vh;overflow-y:auto;background:var(--panel);color:var(--text);border:1px solid var(--line);border-radius:12px;padding:18px 22px;line-height:1.5}dialog.help::backdrop{background:#0000008c}dialog.help h2{margin:0 0 8px;font-size:17px}dialog.help h3{margin:16px 0 4px;font-size:13px;color:var(--accent)}dialog.help p,dialog.help li{color:#cfcfcf}dialog.help p{margin:6px 0}dialog.help .close{position:sticky;float:right;top:0}dialog.help .foot{margin-top:16px;padding-top:10px;border-top:1px solid var(--line);color:var(--dim);font-size:12px}dialog.help a{color:var(--accent)}