:root{--bg:var(--cb-bg);--surface:var(--cb-panel);--border:var(--cb-line);--text:var(--cb-text);--muted:var(--cb-text-muted);--accent:var(--cb-blue)}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:14px/1.6 system-ui,"Microsoft YaHei",sans-serif}header{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border);padding:18px 4vw;gap:18px}a{color:var(--cb-blue-ink);text-decoration:none}a:hover{text-decoration:underline}.brand{font-size:22px;font-weight:750;color:var(--accent)}.brand span{font-size:17px;color:var(--text);margin-left:14px}nav{display:flex;gap:18px;flex-wrap:wrap}main{max-width:1560px;margin:auto;padding:30px 4vw}.heading{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:24px}h1{font-size:30px;line-height:1.3;margin:8px 0}h2{font-size:18px;margin:0 0 14px}p{margin:8px 0 16px}.eyebrow{font-size:11px;letter-spacing:.15em;color:var(--accent)}.muted,.heading>div>p:last-child,footer{color:var(--muted)}.panel{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:20px}.notice{background:var(--cb-blue-soft);border-left:3px solid var(--accent);padding:12px 16px;margin-bottom:18px}.notice.error{background:var(--cb-red-soft);border-color:var(--cb-red)}.projectbar{display:flex;gap:12px;align-items:flex-end;flex-wrap:wrap;margin-bottom:22px}.projectbar label{min-width:120px;max-width:220px}.projectbar input,.projectbar select{margin:0}.tabs{margin:20px 0;align-items:center}.tabs button[aria-pressed=true]{background:var(--accent);color:var(--cb-on-accent);border-color:var(--accent)}.workspace{display:grid;grid-template-columns:minmax(300px,.9fr) minmax(440px,1.3fr);gap:20px}.inputs,.output{min-width:0}.input-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 12px}label{display:block;color:var(--muted);margin-bottom:12px;font-size:12px}input,select,textarea,button{font:inherit}input:not([type=checkbox]),select,textarea{width:100%;background:var(--cb-bg);color:var(--text);border:1px solid var(--cb-line);border-radius:6px;padding:9px 10px;margin-top:5px}input:focus,select:focus,textarea:focus,button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}input[type=checkbox]{accent-color:var(--accent);margin-right:8px}button{border:1px solid var(--cb-line);background:var(--cb-panel-soft);color:var(--text);padding:9px 13px;border-radius:7px;cursor:pointer}button:hover{border-color:var(--accent)}button:disabled{opacity:.45;cursor:default}.primary{background:var(--accent);color:var(--cb-on-accent);font-weight:700}.row,.runbar{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.row h2{margin-right:auto}.runbar{margin-top:22px}.runbar .primary{flex:1}.sample{background:var(--cb-orange-soft);color:var(--cb-orange-ink);padding:8px 12px;border-radius:5px}.check{margin-top:12px}details{margin-top:18px;border-top:1px solid var(--border);padding-top:12px}summary{cursor:pointer;font-weight:600}textarea{font:12px/1.5 ui-monospace,monospace;resize:vertical}.empty{min-height:220px;display:grid;place-items:center;text-align:center;color:var(--muted)}.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:14px 0}.metric{padding:12px;border:1px solid var(--border);border-radius:8px}.metric strong{display:block;font-size:23px;color:var(--accent)}.metric small{color:var(--muted)}.chart{width:100%;height:auto;background:var(--cb-bg);border-radius:8px;margin-top:12px}.chart text{font:11px system-ui;fill:var(--cb-text-muted)}.chart polyline{fill:none;stroke:#55ddc5;stroke-width:2}.chart .axis{stroke:var(--cb-line);stroke-width:1}.table-scroll{max-width:100%;overflow:auto}table{border-collapse:collapse;width:100%;margin:14px 0;font-size:12px}th,td{padding:9px;border-bottom:1px solid var(--border);text-align:left;white-space:normal;overflow-wrap:anywhere}th{color:var(--muted)}pre{font:12px/1.6 ui-monospace,monospace;white-space:pre-wrap;overflow-wrap:anywhere;max-height:500px;overflow:auto}.notes{padding-left:20px;color:var(--muted);font-size:12px}footer{margin:30px 0;font-size:12px}.source{overflow-wrap:anywhere;font-size:11px;color:var(--muted)}[hidden]{display:none!important}@media(max-width:900px){.workspace{grid-template-columns:1fr}.heading{display:block}.projectbar{gap:8px}.projectbar label{max-width:none;flex:1 1 150px}.metrics{grid-template-columns:repeat(2,1fr)}}@media(max-width:480px){main{padding:20px 14px}header{padding:14px;align-items:flex-start}header nav{font-size:12px;gap:8px}.brand span{display:none}h1{font-size:24px}.input-grid{grid-template-columns:1fr}.tabs{gap:8px}.metrics{grid-template-columns:1fr}.panel{padding:15px}}
/* Match the workbench shell while retaining solver plot semantics. */
body { font-family: var(--cb-font); font-size: var(--cb-fs-md); line-height: 1.6; }
button, input, select, textarea { border-radius: var(--cb-radius-sm); }
.primary, .tabs button[aria-pressed=true] { color: var(--cb-on-accent); }
.primary:hover:enabled { background: var(--cb-blue-strong); }
.notice { color: var(--cb-text); border-radius: var(--cb-radius-sm); }
.notice.error { color: var(--cb-red); }