:root{--paper:#f5f3ed;--paper-line:rgba(38,56,84,0.07);--surface:#fffdf8;--ink:#181c22;--ink-soft:#4c5563;--line:#23282f;--line-soft:#c9c4b8;--accent:#e8590c;--accent-dark:#c74a08;--accent-soft:#ffe8d6;--plan-tile:#e9ecf1;--plan-tile-line:#97a2b0;--plan-cut:#ffddc2;--plan-cut-line:#d9740f;--ok:#2f7d4f;--mono:ui-monospace,"SFMono-Regular","Cascadia Mono","Roboto Mono",Menlo,monospace;--sans:-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}*{box-sizing:border-box;margin:0;padding:0}html{-webkit-text-size-adjust:100%}body{font-family:var(--sans);color:var(--ink);background-color:var(--paper);background-image:linear-gradient(var(--paper-line) 1px,transparent 1px),linear-gradient(90deg,var(--paper-line) 1px,transparent 1px);background-size:24px 24px;line-height:1.55}.wrap{max-width:1080px;margin:0 auto;padding:0 16px}.site-header{border-bottom:2px solid var(--line);background:var(--surface);position:-webkit-sticky;position:sticky;top:0;z-index:20}.site-header 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.unit{position:absolute;right:10px;top:50%;transform:translateY(-50%);font-family:var(--mono);font-size:13px;color:var(--ink-soft);pointer-events:none}.input-unit .num-input{padding-right:40px}.chips{display:flex;flex-wrap:wrap;gap:8px}.chip{font-family:var(--mono);font-size:14px;font-weight:600;padding:8px 12px;border:2px solid var(--line);background:#fff;cursor:pointer;color:var(--ink);min-height:44px}.chip:hover{border-color:var(--accent)}.chip[aria-pressed=true]{background:var(--ink);color:#fff;border-color:var(--ink)}.chip[aria-pressed=true]:before{content:"▸ ";color:var(--accent)}.pattern-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(105px,1fr));grid-gap:8px;gap:8px}.pattern-card{border:2px solid var(--line);background:#fff;cursor:pointer;padding:8px;text-align:center;min-height:44px}.pattern-card:hover{border-color:var(--accent)}.pattern-card[aria-pressed=true]{border-color:var(--accent);background:var(--accent-soft);box-shadow:inset 0 0 0 1px var(--accent)}.pattern-card svg{display:block;margin:0 auto 6px}.pattern-card .pname{font-size:12px;font-weight:700}.cutout-row{display:grid;grid-template-columns:repeat(4,1fr) 40px;grid-gap:6px;gap:6px;margin-bottom:8px;align-items:center}.cutout-row .num-input{font-size:14px;padding:8px 6px}.cutout-head{display:grid;grid-template-columns:repeat(4,1fr) 40px;grid-gap:6px;gap:6px;font-size:10.5px;text-transform:uppercase;letter-spacing:.04em;color:var(--ink-soft);font-weight:700;margin-bottom:4px}.btn-icon{border:2px solid var(--line);background:#fff;cursor:pointer;font-size:16px;font-weight:700;height:38px;color:var(--ink)}.btn-icon:hover{border-color:var(--accent);color:var(--accent)}.btn-add{border:2px dashed var(--line);background:transparent;cursor:pointer;padding:8px 14px;font-weight:700;font-size:13px;color:var(--ink-soft);width:100%}.btn-add:hover{border-color:var(--accent);color:var(--accent)}.seg{display:inline-flex;border:2px solid var(--line)}.seg button{border:0;background:#fff;padding:9px 14px;cursor:pointer;font-weight:700;font-size:13px;color:var(--ink);min-height:42px}.seg button+button{border-left:2px solid var(--line)}.seg button[aria-pressed=true]{background:var(--ink);color:#fff}.stats{display:grid;grid-template-columns:repeat(2,1fr);grid-gap:10px;gap:10px;margin-bottom:16px}@media (min-width:640px){.stats{grid-template-columns:repeat(4,1fr)}}.stat{border:2px solid var(--line);background:var(--surface);padding:10px 12px}.stat.accent{border-color:var(--accent);background:var(--accent-soft)}.stat .k{font-size:10.5px;text-transform:uppercase;letter-spacing:.07em;font-weight:800;color:var(--ink-soft)}.stat .v{font-family:var(--mono);font-size:24px;font-weight:700;line-height:1.2;font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.stat .v small{font-size:13px;color:var(--ink-soft);font-weight:600}.stat.accent .v{color:var(--accent-dark)}.plan-box{border:2px solid var(--line);background:#fff;padding:10px}.plan-box 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(min-width:760px){.steps{grid-template-columns:repeat(3,1fr)}}.step{border:2px solid var(--line);background:var(--surface);padding:18px}.step .no{font-family:var(--mono);font-weight:800;font-size:26px;color:var(--accent)}.step h3{font-size:16px;margin:6px 0;text-transform:uppercase;letter-spacing:.03em}.step p{font-size:14.5px;color:var(--ink-soft)}.muster-grid{display:grid;grid-gap:14px;gap:14px;grid-template-columns:1fr}@media (min-width:760px){.muster-grid{grid-template-columns:repeat(2,1fr)}}.muster{border:2px solid var(--line);background:var(--surface);padding:18px;display:flex;gap:14px}.muster svg{flex:none}.muster h3{font-size:16px;margin-bottom:4px}.muster p{font-size:14px;color:var(--ink-soft)}.muster .meta{font-family:var(--mono);font-size:12px;color:var(--accent-dark);font-weight:700;margin-top:6px}.faq details{border:2px solid var(--line);background:var(--surface);margin-bottom:10px}.faq summary{cursor:pointer;padding:14px 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