:root{
  --ground:#fff;--panel:#fbfcfd;--ink:#171b20;--muted:#606a74;--faint:#8a939c;
  --line:#e6eaee;--line-strong:#d3d9df;--accent:#2647e6;--accent-soft:#eaeeff;
  --ok:#15803d;--ok-soft:#e7f4ec;--warn:#b45309;--warn-soft:#fbf1e3;--fail:#c02626;--fail-soft:#fbeaea;
  --band:#c9d2f2;--mono:ui-monospace,Menlo,Consolas,monospace;
  --sans:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
@media(prefers-color-scheme:dark){:root{
  --ground:#0f1215;--panel:#161a1f;--ink:#e9edf1;--muted:#9aa4ae;--faint:#6c7680;
  --line:#242a31;--line-strong:#323a43;--accent:#7d92ff;--accent-soft:#1b2340;
  --ok:#4ade80;--ok-soft:#12261a;--warn:#fbbf5a;--warn-soft:#2a2010;--fail:#f87171;--fail-soft:#2a1414;--band:#2c3a6b;
}}
:root[data-theme="dark"]{--ground:#0f1215;--panel:#161a1f;--ink:#e9edf1;--muted:#9aa4ae;--faint:#6c7680;--line:#242a31;--line-strong:#323a43;--accent:#7d92ff;--accent-soft:#1b2340;--ok:#4ade80;--ok-soft:#12261a;--warn:#fbbf5a;--warn-soft:#2a2010;--fail:#f87171;--fail-soft:#2a1414;--band:#2c3a6b;}
:root[data-theme="light"]{--ground:#fff;--panel:#fbfcfd;--ink:#171b20;--muted:#606a74;--faint:#8a939c;--line:#e6eaee;--line-strong:#d3d9df;--accent:#2647e6;--accent-soft:#eaeeff;--ok:#15803d;--ok-soft:#e7f4ec;--warn:#b45309;--warn-soft:#fbf1e3;--fail:#c02626;--fail-soft:#fbeaea;--band:#c9d2f2;}
*{box-sizing:border-box}
body{margin:0;background:var(--ground);color:var(--ink);font-family:var(--sans);font-size:14px;line-height:1.5}
.num{font-variant-numeric:tabular-nums;font-family:var(--mono)}
button{font-family:inherit;cursor:pointer}
.hidden{display:none!important}
.topbar{display:flex;align-items:center;gap:14px;padding:12px 20px;border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:9px;font-weight:600;cursor:pointer}
.brand .mark{width:22px;height:22px;border:2px solid var(--accent);border-radius:6px}
.badge{font-size:10.5px;letter-spacing:.09em;text-transform:uppercase;color:var(--faint);border:1px solid var(--line-strong);padding:2px 7px;border-radius:20px}
.spacer{flex:1}.crumbs{color:var(--muted);font-size:12.5px}.crumbs b{color:var(--ink)}
.theme-toggle{border:1px solid var(--line-strong);background:transparent;color:var(--muted);border-radius:7px;padding:5px 9px}

.screen1{min-height:calc(100vh - 47px);display:flex;flex-direction:column;align-items:center;justify-content:center;padding:40px 20px;text-align:center}
.s1-eyebrow{font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);font-weight:600;margin-bottom:14px}
.s1-title{font-size:clamp(24px,4vw,32px);font-weight:650;letter-spacing:-.02em;max-width:18ch;text-wrap:balance;margin:0 0 10px}
.s1-sub{color:var(--muted);max-width:52ch;margin:0 auto 38px}
.cards{display:grid;grid-template-columns:repeat(3,minmax(0,220px));gap:18px}
@media(max-width:720px){.cards{grid-template-columns:1fr}}
.card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:24px 20px;text-align:left;display:flex;flex-direction:column;gap:10px;transition:.15s}
.card:hover{border-color:var(--accent);transform:translateY(-3px)}
.card .ic{width:40px;height:40px;color:var(--accent)}
.card h3{margin:0;font-size:16px;font-weight:620}.card p{margin:0;color:var(--muted);font-size:13px}
.card .std{font-family:var(--mono);font-size:11.5px;color:var(--faint)}

.workspace{display:grid;grid-template-columns:210px 250px 1fr 260px;height:calc(100vh - 47px)}
@media(max-width:1100px){.workspace{grid-template-columns:190px 230px 1fr}.col-results{display:none}}
.col{border-right:1px solid var(--line);overflow-y:auto;min-height:0}
.col:last-child{border-right:0}
.col-head{padding:12px 14px 8px;font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--faint);font-weight:600;position:sticky;top:0;background:var(--ground)}
.tree{padding:2px 8px 8px}
.trow{display:flex;align-items:center;gap:7px;padding:6px 8px;border-radius:7px;cursor:pointer;font-size:13px}
.trow:hover{background:var(--panel)}.trow .tw{width:12px;color:var(--faint);font-size:10px}
.trow.open .tw{transform:rotate(90deg)}
.tchild{margin-left:14px;border-left:1px solid var(--line);padding-left:4px}
.tleaf{padding:5px 8px 5px 20px;font-size:12.5px;color:var(--muted);border-radius:7px;cursor:pointer}
.tleaf:hover{background:var(--panel);color:var(--ink)}
.tleaf.active{background:var(--accent-soft);color:var(--accent);font-weight:600}
.addbtn{margin:6px 10px 14px;padding:9px;border:1px dashed var(--line-strong);background:transparent;color:var(--muted);border-radius:8px;font-size:12.5px;width:calc(100% - 20px)}
.addbtn:hover{border-color:var(--accent);color:var(--accent)}
.col-input{background:var(--panel)}
.fgroup{padding:6px 14px 10px}.fgroup h4{margin:12px 0 8px;font-size:12px;font-weight:650;display:flex;align-items:center;gap:8px}
.fgroup h4::before{content:"";width:3px;height:12px;background:var(--accent);border-radius:2px}
.field{margin-bottom:9px}.field label{display:block;font-size:11.5px;color:var(--muted);margin-bottom:4px}
.field .inrow{display:flex;gap:6px}.field .unit{align-self:center;color:var(--faint);font-size:12px;font-family:var(--mono)}
.field input,.field select{width:100%;padding:7px 9px;border:1px solid var(--line-strong);border-radius:7px;background:var(--ground);color:var(--ink);font-size:13px;font-family:var(--mono)}
.calcbtn{margin:8px 14px 18px;padding:11px;background:var(--accent);color:#fff;border:0;border-radius:8px;font-weight:600;font-size:14px;width:calc(100% - 28px)}
.calcbtn:disabled{opacity:.5;cursor:not-allowed}
.col-chart{padding:14px 16px;display:flex;flex-direction:column}
.chart-head{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:6px}
.chart-head h3{margin:0;font-size:14px}.chart-src{font-size:11px;color:var(--faint);font-family:var(--mono)}
.chart-box{flex:1;min-height:0}svg{width:100%;height:100%}
.legend{display:flex;flex-wrap:wrap;gap:14px;padding-top:8px;font-size:11.5px;color:var(--muted)}
.legend span{display:inline-flex;align-items:center;gap:6px}.sw{width:14px;height:3px;border-radius:2px}
.sw.band{height:11px;background:var(--band)}.sw.mn{background:var(--accent)}.sw.mx{background:var(--fail)}.sw.ld{background:var(--ok)}
.col-results{background:var(--panel)}.rres{padding:6px 14px 14px}
.kv{display:flex;justify-content:space-between;padding:7px 0;border-bottom:1px solid var(--line)}
.kv .k{color:var(--muted);font-size:12.5px}.kv .v{font-family:var(--mono);font-weight:600}.kv .v.accent{color:var(--accent)}
.checks{margin-top:14px;display:flex;flex-direction:column;gap:7px}
.check{display:flex;gap:9px;padding:8px 10px;border-radius:8px;font-size:12px}
.check .dot{width:16px;height:16px;border-radius:50%;flex-shrink:0;display:grid;place-items:center;font-size:10px;color:#fff;margin-top:1px}
.check.ok{background:var(--ok-soft)}.check.ok .dot{background:var(--ok)}
.check.warn{background:var(--warn-soft)}.check.warn .dot{background:var(--warn)}
.check.fail{background:var(--fail-soft)}.check.fail .dot{background:var(--fail)}
.check.skipped{border:1px dashed var(--line-strong)}.check.skipped .dot{background:var(--faint)}
.check b{display:block;margin-bottom:1px}.check .cd{color:var(--muted);font-family:var(--mono);font-size:11px}
.exportbtn{margin-top:16px;width:100%;padding:10px;border:1px solid var(--accent);background:transparent;color:var(--accent);border-radius:8px;font-weight:600}
.placeholder{padding:40px 20px;color:var(--faint);text-align:center;font-size:13px}