:root{color-scheme:light;--bg:#fff;--surface:#fff;--line:#e5e5e5;--line-strong:#b8b8b8;--line-thick:#111;--text:#111;--muted:#6f6f6f;--accent:#b23a32;--accent-dark:#8f2d26;--warning-bg:#faf6ec;--warning-line:#d8c48e;--error-bg:#faf0ef;--error-line:#d3a19c}*{box-sizing:border-box}[hidden]{display:none!important}button,input,select{font:inherit}.app{padding:0}.workspace{max-width:1080px;margin:0 auto}.topbar{border-bottom:2px solid var(--line-thick);justify-content:space-between;align-items:end;gap:20px;margin-bottom:22px;padding-bottom:14px;display:flex}.eyebrow{color:var(--accent);letter-spacing:.18em;text-transform:uppercase;margin:0 0 4px;font-size:.72rem;font-weight:700}h1,h2,p{margin-top:0}.topbar h1{font-family:var(--np-serif,serif);letter-spacing:.06em;margin-bottom:0;font-size:clamp(1.5rem,2.8vw,2.1rem);font-weight:600}h2{font-family:var(--np-serif,serif);letter-spacing:.08em;margin-bottom:0;font-size:.98rem;font-weight:600}.source-pill{border:1px solid var(--line-thick);color:var(--text);letter-spacing:.1em;white-space:nowrap;background:0 0;padding:7px 14px;font-size:.8rem;font-weight:600}.calculator{grid-template-columns:minmax(0,1.35fr) minmax(330px,.75fr);align-items:start;gap:0;display:grid}.panel{background:var(--surface)}.controls{padding:0 26px 0 0}.result-panel{border-left:1px solid var(--line);padding:0 0 0 26px;position:sticky;top:18px}.grid{gap:14px;margin-bottom:18px;display:grid}.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}.grid.compact{margin-bottom:14px}.visual-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:6px 0 18px;display:grid}.visual-box{border:1px solid var(--line);background:#fafaf8;min-width:0;padding:12px}.visual-title{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:10px;margin-bottom:8px;padding-bottom:6px;display:flex}.visual-title span{color:var(--muted);overflow-wrap:anywhere;text-align:right;font-size:.74rem;font-weight:600}.svg-host{aspect-ratio:16/9;place-items:center;min-height:178px;display:grid;overflow:hidden}.svg-host svg{width:100%;height:100%;max-height:230px}.diagram-svg{color:#1c1c1c}.diagram-svg .shape-lines{color:#333}.diagram-svg .shape-dims,.diagram-svg .shape-labels{color:var(--accent-dark)}.chart-svg{color:#333}.chart-grid{color:#e5e5e5}.chart-axis,.chart-labels{color:#444}.chart-empty{border:1px dashed var(--line-strong);width:100%;color:var(--muted);text-align:center;margin:0;padding:16px;font-weight:600}label{gap:6px;min-width:0;display:grid}label span{color:var(--muted);letter-spacing:.02em;font-size:.82rem;font-weight:600}input,select{border:1px solid var(--line-strong);width:100%;min-height:42px;color:var(--text);background:#fff;border-radius:0;padding:8px 10px}.computed-box{border:1px solid var(--line);background:#fafaf8;gap:5px;min-height:42px;padding:8px 10px;display:grid}.computed-box>span,.computed-box small{color:var(--muted);font-size:.76rem;font-weight:600}.computed-box output{overflow-wrap:anywhere;font-weight:700}.check-field{align-items:end;min-width:0;display:flex}.inline-check{border:1px solid var(--line);cursor:pointer;background:#fff;align-items:center;gap:9px;width:100%;min-height:42px;padding:8px 10px;display:flex}.inline-check input{flex:none;width:auto;min-height:0}.inline-check span{color:var(--text);overflow-wrap:anywhere;font-size:.86rem}input:focus,select:focus,button:focus-visible{outline-offset:2px;outline:3px solid #11111138}.section-heading{border-top:2px solid var(--line-thick);justify-content:space-between;align-items:center;gap:12px;margin:16px 0 12px;padding-top:12px;display:flex}.section-heading span{color:var(--muted);text-align:right;font-size:.78rem}.actions{border-top:1px solid var(--line);gap:10px;margin-top:6px;padding-top:16px;display:flex}button{border:1px solid var(--text);background:var(--text);color:#fff;letter-spacing:.1em;cursor:pointer;border-radius:0;min-height:42px;padding:9px 20px;font-weight:700}button:hover{border-color:var(--accent);background:var(--accent)}button.secondary{border-color:var(--line-strong);color:var(--text);background:#fff}button.secondary:hover{border-color:var(--text);background:#f4f4f2}.result-stack{gap:18px;display:grid}.metric-label{border-bottom:2px solid var(--line-thick);color:var(--text);font-family:var(--np-serif,serif);letter-spacing:.1em;margin-bottom:4px;padding-bottom:6px;font-size:.95rem;font-weight:600}.metric{overflow-wrap:anywhere;max-width:100%;font-family:var(--np-serif,serif);font-size:clamp(2rem,5vw,3rem);font-weight:600;line-height:1.05;display:inline-block}.unit{color:var(--muted);font-weight:600}.result-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:0;display:grid}.result-grid div{border:1px solid var(--line);padding:10px}dt{color:var(--muted);letter-spacing:.04em;font-size:.76rem;font-weight:600}dd{overflow-wrap:anywhere;margin:3px 0 0;font-weight:700}.formula-box{border-top:1px solid var(--line);margin-top:18px;padding-top:16px}.formula-box p{overflow-wrap:anywhere;margin-bottom:8px}#formula-text{color:#1c1c1c;font-family:Cascadia Mono,Consolas,monospace}#source-text{color:var(--muted);font-size:.86rem}.warning-list,.error-box{margin-top:14px}.warning-list{gap:8px;padding-left:0;list-style:none;display:grid}.warning-list li,.error-box{padding:10px 12px}.warning-list li{border:1px solid var(--warning-line);background:var(--warning-bg);border-left:3px solid #b08d3c}.error-box{border:1px solid var(--error-line);border-left:3px solid var(--accent-dark);background:var(--error-bg);color:var(--accent-dark);font-weight:700}@media (width<=900px){.topbar{flex-direction:column;align-items:start}.calculator,.grid.two,.grid.three,.visual-grid{grid-template-columns:1fr}.controls{padding-right:0}.result-panel{border-left:none;border-top:2px solid var(--line-thick);margin-top:24px;padding:20px 0 0;position:static}}@media (width<=520px){.actions,.section-heading{flex-direction:column;align-items:stretch}.section-heading span{text-align:left}.result-grid{grid-template-columns:1fr}}