:root{--brand: #c2410c;--brand-strong: #9a3412;--brand-soft: #fff1e8;--accent: #1d4ed8;--ink: #1e293b;--ink-soft: #475569;--line: #e2e8f0;--bg: #ffffff;--bg-soft: #f1f5f9;--ok: #15803d;--radius: 12px;--shadow: 0 1px 2px rgb(15 23 42 / .06), 0 4px 16px rgb(15 23 42 / .06);--font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--mono: ui-monospace, "Cascadia Mono", "SF Mono", Consolas, monospace;--wrap: 72rem;color-scheme:light}@media(prefers-color-scheme:dark){:root{--brand: #fb923c;--brand-strong: #fdba74;--brand-soft: #2a1a10;--accent: #93c5fd;--ink: #e2e8f0;--ink-soft: #94a3b8;--line: #273449;--bg: #0f172a;--bg-soft: #16213a;--ok: #4ade80;--shadow: none;color-scheme:dark}}*,*:before,*:after{box-sizing:border-box}[hidden]{display:none!important}html{-webkit-text-size-adjust:100%}body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);font-size:1.0625rem;line-height:1.65}img{max-width:100%;height:auto}a{color:var(--accent);text-underline-offset:2px}a:hover{text-decoration-thickness:2px}h1,h2,h3{line-height:1.2;letter-spacing:-.01em}h1{font-size:clamp(1.9rem,4vw,2.75rem);margin:0 0 .5rem}h2{font-size:clamp(1.35rem,2.6vw,1.75rem);margin:2.25rem 0 .75rem}h3{font-size:1.15rem;margin:1.5rem 0 .5rem}:focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:4px}.wrap{max-width:var(--wrap);margin:0 auto;padding:0 16px}.prose{max-width:46rem}.muted{color:var(--ink-soft)}.skip{position:absolute;left:-999px}.skip:focus{left:16px;top:8px;background:var(--bg);padding:8px 12px;z-index:10}.site-header{border-bottom:1px solid var(--line);background:var(--bg);position:sticky;top:0;z-index:5}.site-header .wrap{display:flex;align-items:center;gap:16px;min-height:64px;flex-wrap:wrap}.logo{display:flex;align-items:center;gap:8px;font-weight:800;font-size:1.2rem;color:var(--ink);text-decoration:none}.logo b{color:var(--brand)}.nav{margin-left:auto}.nav ul{list-style:none;display:flex;gap:4px;margin:0;padding:0;flex-wrap:wrap}.nav a{display:block;padding:8px 10px;border-radius:8px;color:var(--ink);text-decoration:none;font-size:.95rem}.nav a:hover,.nav a[aria-current=page]{background:var(--bg-soft)}.nav-toggle{display:none;margin-left:auto;background:none;border:1px solid var(--line);border-radius:8px;padding:8px 12px;color:var(--ink);font:inherit}@media(max-width:900px){.nav-toggle{display:block}.nav{display:none;width:100%;margin:0 0 12px}.nav.open{display:block}.nav ul{flex-direction:column}}.hero{padding:48px 0 32px;background:linear-gradient(180deg,var(--brand-soft),var(--bg))}.hero p.lead{font-size:1.2rem;color:var(--ink-soft);max-width:40rem;margin:0 0 24px}.search{display:flex;gap:8px;max-width:36rem}.search input{flex:1;min-width:0;font:inherit;padding:12px 14px;border-radius:10px;border:1px solid var(--line);background:var(--bg);color:var(--ink)}.btn{display:inline-block;font:inherit;font-weight:600;padding:12px 18px;border-radius:10px;border:0;background:var(--brand);color:#fff;text-decoration:none;cursor:pointer}@media(prefers-color-scheme:dark){.btn{color:#1c0d02}}.btn:hover{background:var(--brand-strong)}.grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fill,minmax(15rem,1fr))}.card{display:block;padding:18px;border:1px solid var(--line);border-radius:var(--radius);background:var(--bg);box-shadow:var(--shadow);color:var(--ink);text-decoration:none}a.card:hover{border-color:var(--brand)}.card h3{margin:0 0 4px;font-size:1.05rem}.card p{margin:0;color:var(--ink-soft);font-size:.95rem}.card .icon{font-size:1.6rem;display:block;margin-bottom:6px}.tag{display:inline-block;font-size:.75rem;font-weight:700;padding:2px 8px;border-radius:999px;background:var(--bg-soft);color:var(--ink-soft);margin-top:8px}.tag.live{background:var(--brand-soft);color:var(--brand-strong)}.section{padding:32px 0}.points{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(14rem,1fr))}.points div{padding:16px;border-radius:var(--radius);background:var(--bg-soft)}.points strong{display:block;margin-bottom:4px}.breadcrumbs{font-size:.9rem;color:var(--ink-soft);padding:16px 0 0}.breadcrumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;padding:0;margin:0}.breadcrumbs li+li:before{content:"›";margin-right:6px}.note{border-left:4px solid var(--brand);background:var(--bg-soft);padding:12px 16px;border-radius:0 8px 8px 0}.site-footer{margin-top:48px;border-top:1px solid var(--line);background:var(--bg-soft);padding:32px 0;font-size:.95rem}.site-footer .cols{display:grid;gap:24px;grid-template-columns:repeat(auto-fit,minmax(12rem,1fr))}.site-footer ul{list-style:none;padding:0;margin:0}.site-footer li{margin:4px 0}.site-footer a{color:var(--ink)}.site-footer h2{font-size:1rem;margin:0 0 8px}.calc-page h1{margin-top:16px}.lead{font-size:1.1rem;max-width:46rem}.small{font-size:.85rem}.calc{display:grid;gap:20px;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);align-items:start;margin:24px 0 8px}@media(max-width:760px){.calc{grid-template-columns:1fr}}.calc-form,.results{border:1px solid var(--line);border-radius:var(--radius);padding:18px;background:var(--bg);box-shadow:var(--shadow)}.results{position:sticky;top:80px;background:var(--bg-soft)}@media(max-width:760px){.results{position:static}}.results h2{margin:0 0 8px;font-size:1.15rem}.results dl{margin:0}.results dl>div{display:flex;justify-content:space-between;gap:12px;padding:8px 0;border-bottom:1px dashed var(--line)}.results dt{color:var(--ink-soft)}.results dd{margin:0;font-weight:700;font-family:var(--mono);text-align:right}.results .main dd{font-size:1.5rem;color:var(--brand-strong)}.results .main dt{color:var(--ink);font-weight:600;align-self:center}.result-error{color:#b91c1c;font-weight:600}@media(prefers-color-scheme:dark){.result-error{color:#fca5a5}}.result-actions{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0 6px}.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}.btn.ghost:hover{background:var(--bg)}.field{display:flex;flex-direction:column;gap:4px;margin-bottom:14px;min-width:0}.field label{font-weight:600;font-size:.95rem}.field .unit{font-weight:400;color:var(--ink-soft);margin-left:4px}.field .unit:before{content:"("}.field .unit:after{content:")"}.field input,.field select{font:inherit;padding:10px 12px;border:1px solid var(--line);border-radius:8px;background:var(--bg);color:var(--ink);width:100%;min-height:44px}.field input[type=checkbox]{width:22px;height:22px;min-height:22px;padding:0;margin:0;flex:none;accent-color:var(--brand)}.field label.check{display:flex;align-items:center;gap:10px;min-height:44px;cursor:pointer}.row{display:grid;gap:0 12px;grid-template-columns:repeat(auto-fit,minmax(8rem,1fr))}fieldset.units{border:0;padding:0;margin:0 0 14px;display:flex;gap:16px;flex-wrap:wrap}fieldset.units legend{font-weight:600;font-size:.95rem;margin-bottom:6px;padding:0}fieldset.units label{display:flex;align-items:center;gap:6px;min-height:32px}details.more{margin-top:4px}.form-h{font-size:1rem;margin:18px 0 8px;padding-top:12px;border-top:1px solid var(--line)}.project-status{margin:4px 0 0;color:var(--ink-soft)}.pj{padding:28px 0 48px}.project-bar{display:grid;gap:0 12px;grid-template-columns:repeat(auto-fit,minmax(12rem,1fr));align-items:end;margin:18px 0}.project-actions{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}.project-list{position:static;margin-bottom:24px}.shopping{width:100%;border-collapse:collapse}.shopping th,.shopping td{text-align:left;padding:10px 8px;border-bottom:1px dashed var(--line);vertical-align:top}.shopping td.amt{font-family:var(--mono);font-weight:700;white-space:nowrap}.shopping th{font-size:.9rem;color:var(--ink-soft)}.total{font-weight:700;margin:12px 0 0}@media(max-width:600px){.shopping thead{display:none}.shopping tr{display:grid;grid-template-columns:1fr auto;gap:2px 12px;padding:10px 0;border-bottom:1px dashed var(--line)}.shopping td{padding:0;border:0;min-width:0;overflow-wrap:anywhere}.shopping td:nth-child(3){grid-column:1 / -1;font-size:.9rem}.shopping td:nth-child(3):empty{display:none}}.empty{padding:18px;border:1px dashed var(--line);border-radius:12px}.entries .entry{border:1px solid var(--line);border-radius:12px;padding:14px 16px;margin:0 0 12px}.entries .entry h3{margin:0 0 8px;font-size:1.05rem}.entries dl{margin:0}.entries dl>div{display:flex;justify-content:space-between;gap:12px;padding:4px 0;font-size:.95rem}.entries dt{color:var(--ink-soft)}.entries dd{margin:0;font-family:var(--mono);text-align:right}.entry-actions{display:flex;gap:8px;margin-top:10px}.nav .pj-count{display:inline-block;min-width:1.4em;padding:0 6px;margin-left:4px;border-radius:999px;background:var(--brand);color:#fff;font-size:.8rem;text-align:center}.nav .pj-count:empty{display:none}.compare,.compare .row{margin-top:6px}@media print{.project-bar,.entries,.project-status,.pj .lead{display:none!important}}details.more summary{cursor:pointer;font-weight:600;color:var(--accent);margin-bottom:10px}.guide{margin-top:24px}.guide details{border-bottom:1px solid var(--line);padding:10px 0}.guide summary{cursor:pointer;font-weight:600}.guide table{width:100%;border-collapse:collapse;font-size:.95rem;display:block;overflow-x:auto}.guide th,.guide td{text-align:left;padding:8px;border-bottom:1px solid var(--line);vertical-align:top}.guide th{background:var(--bg-soft)}.example{background:var(--bg-soft);border-radius:var(--radius);padding:14px 18px}.formula{font-family:var(--mono);background:var(--bg-soft);padding:10px 14px;border-radius:8px;overflow-x:auto}@media print{.site-header,.site-footer,.breadcrumbs,.calc-form,.guide,.result-actions,.section{display:none!important}.calc{display:block}.results{border:0;box-shadow:none}}