:root{color-scheme:light;--bg:#f6f8fb;--surface:#fff;--line:#d9e0ea;--line-strong:#b7c3d4;--text:#1f2937;--muted:#5d6b7c;--accent:#0f766e;--accent-dark:#0b5f59;--warning-bg:#fff7ed;--warning-line:#fdba74;--error-bg:#fef2f2;--error-line:#fca5a5;--shadow:0 12px 36px #16223314}*{box-sizing:border-box}[hidden]{display:none!important}body{background:var(--bg);color:var(--text);margin:0;font-family:Segoe UI,Yu Gothic UI,Hiragino Kaku Gothic ProN,Meiryo,sans-serif;line-height:1.55}button,input,select{font:inherit}.app{min-height:100vh;padding:28px}.workspace{max-width:1180px;margin:0 auto}.topbar{justify-content:space-between;align-items:end;gap:20px;margin-bottom:18px;display:flex}.eyebrow{color:var(--accent);letter-spacing:0;margin:0 0 4px;font-size:.82rem;font-weight:700}h1,h2,p{margin-top:0}h1{letter-spacing:0;margin-bottom:0;font-size:clamp(1.7rem,3vw,2.4rem)}h2{letter-spacing:0;margin-bottom:0;font-size:.98rem}.source-pill{border:1px solid var(--line);color:var(--accent-dark);white-space:nowrap;background:#eef6f5;border-radius:8px;padding:8px 12px;font-weight:700}.calculator{grid-template-columns:minmax(0,1.35fr) minmax(330px,.75fr);align-items:start;gap:18px;display:grid}.panel{border:1px solid var(--line);background:var(--surface);box-shadow:var(--shadow);border-radius:8px}.controls{padding:20px}.result-panel{padding:20px;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:#fbfdff;border-radius:8px;min-width:0;padding:12px}.visual-title{justify-content:space-between;align-items:center;gap:10px;margin-bottom:8px;display:flex}.visual-title span{color:var(--muted);overflow-wrap:anywhere;text-align:right;font-size:.78rem;font-weight:800}.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:#263243}.diagram-svg .shape-lines{color:#334155}.diagram-svg .shape-dims,.diagram-svg .shape-labels{color:var(--accent-dark)}.chart-svg{color:#334155}.chart-grid{color:#d7dee8}.chart-axis,.chart-labels{color:#405166}.chart-empty{border:1px dashed var(--line-strong);width:100%;color:var(--muted);text-align:center;border-radius:8px;margin:0;padding:16px;font-weight:800}label{gap:6px;min-width:0;display:grid}label span{color:var(--muted);font-size:.86rem;font-weight:700}input,select{border:1px solid var(--line-strong);width:100%;min-height:42px;color:var(--text);background:#fff;border-radius:8px;padding:8px 10px}.computed-box{border:1px solid var(--line);background:#f8fbfc;border-radius:8px;gap:5px;min-height:42px;padding:8px 10px;display:grid}.computed-box>span,.computed-box small{color:var(--muted);font-size:.78rem;font-weight:800}.computed-box output{overflow-wrap:anywhere;font-weight:850}.check-field{align-items:end;min-width:0;display:flex}.inline-check{border:1px solid var(--line);cursor:pointer;background:#fff;border-radius:8px;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 #0f766e3d}.section-heading{border-top:1px solid var(--line);justify-content:space-between;align-items:center;gap:12px;margin:16px 0 12px;padding-top:16px;display:flex}.section-heading span{color:var(--muted);text-align:right;font-size:.82rem}.actions{border-top:1px solid var(--line);gap:10px;margin-top:6px;padding-top:16px;display:flex}button{border:1px solid var(--accent);background:var(--accent);color:#fff;cursor:pointer;border-radius:8px;min-height:42px;padding:9px 16px;font-weight:800}button:hover{background:var(--accent-dark)}button.secondary{border-color:var(--line-strong);color:var(--text);background:#fff}button.secondary:hover{background:#f1f5f9}.result-stack{gap:18px;display:grid}.metric-label{color:var(--muted);margin-bottom:4px;font-size:.86rem;font-weight:800}.metric{overflow-wrap:anywhere;letter-spacing:0;max-width:100%;font-size:clamp(2rem,5vw,3rem);font-weight:850;line-height:1.05;display:inline-block}.unit{color:var(--muted);font-weight:800}.result-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:0;display:grid}.result-grid div{border:1px solid var(--line);border-radius:8px;padding:10px}dt{color:var(--muted);font-size:.78rem;font-weight:800}dd{overflow-wrap:anywhere;margin:3px 0 0;font-weight:750}.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:#263243;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{border-radius:8px;padding:10px 12px}.warning-list li{border:1px solid var(--warning-line);background:var(--warning-bg)}.error-box{border:1px solid var(--error-line);background:var(--error-bg);color:#991b1b;font-weight:800}@media (width<=900px){.app{padding:18px}.topbar{flex-direction:column;align-items:start}.calculator,.grid.two,.grid.three,.visual-grid{grid-template-columns:1fr}.result-panel{position:static}}@media (width<=520px){.app{padding:12px}.controls,.result-panel{padding:15px}.actions,.section-heading{flex-direction:column;align-items:stretch}.section-heading span{text-align:left}.result-grid{grid-template-columns:1fr}}