:root{--ink:#1c2430;--ink-soft:#4a5568;--line:#dde3ea;--paper:#fff;--paper-alt:#f5f7fa;--accent:#c2410c;--accent-soft:#fff3ec;--ok:#166534;--radius:10px;--mono:ui-monospace, "SF Mono", Menlo, Consolas, monospace}*{box-sizing:border-box}html{color-scheme:light}body{color:var(--ink);background:var(--paper);-webkit-text-size-adjust:100%;margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.6}.wrap{max-width:1080px;margin:0 auto;padding:0 32px}@media (width<=640px){.wrap{padding:0 16px}}.site-header{border-bottom:1px solid var(--line);background:var(--paper);z-index:10;justify-content:space-between;align-items:center;padding:12px 16px;display:flex;position:sticky;top:0}.brand{color:var(--ink);align-items:center;gap:8px;font-size:1.05rem;font-weight:400;text-decoration:none;display:inline-flex}.brand b{font-weight:700}.brand svg{color:var(--accent)}.site-nav a{color:var(--ink-soft);font-size:.92rem;text-decoration:none}.site-nav a:hover{color:var(--ink)}.site-main{padding:24px 0 48px}.site-footer{border-top:1px solid var(--line);color:var(--ink-soft);padding:20px 16px 32px;font-size:.85rem}.calc-card{background:var(--paper-alt);border:1px solid var(--line);border-radius:var(--radius);margin:20px 0 28px;padding:20px}.calc-grid{grid-template-columns:repeat(auto-fit,150px);justify-content:start;gap:14px 20px;display:grid}@media (width<=480px){.calc-grid{grid-template-columns:1fr 1fr}}.field label{color:var(--ink);margin-bottom:4px;font-size:.82rem;font-weight:600;display:block}.field .unit{color:var(--ink-soft);font-weight:400}.field input{background:var(--paper);width:100%;color:var(--ink);border:1px solid #b9c2cf;border-radius:8px;padding:10px 12px;font-family:inherit;font-size:1rem}.field input:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:var(--accent)}.field .help{color:var(--ink-soft);margin-top:4px;font-size:.75rem;line-height:1.4}.results{margin-top:18px}.result-hero{background:var(--accent-soft);border:1px solid #f6c9a8;border-radius:8px;flex-direction:column;gap:2px;padding:14px 16px;display:flex}.result-hero .num{color:var(--accent);font-variant-numeric:tabular-nums;font-size:1.9rem;font-weight:800;line-height:1.2}.result-hero .cap{color:var(--ink-soft);font-size:.85rem}.result-rows{gap:6px;margin-top:12px;display:grid}.result-row{background:var(--paper);border:1px solid var(--line);border-radius:8px;justify-content:space-between;gap:12px;padding:8px 10px;font-size:.92rem;display:flex}.result-row .k{color:var(--ink-soft)}.result-row .v{font-variant-numeric:tabular-nums;white-space:nowrap;font-weight:600}.result-error{color:#9a3412;background:var(--accent-soft);border:1px solid #f6c9a8;border-radius:8px;margin-top:14px;padding:10px 12px;font-size:.9rem;display:none}.result-error.show{display:block}.section{margin:28px 0}.section h2{margin:0 0 10px;font-size:1.25rem}.section ol,.section ul{margin:0;padding-left:22px}.section li{margin:6px 0}.formula-list li{font-family:var(--mono);font-size:.92rem}.faq details{border:1px solid var(--line);background:var(--paper);border-radius:8px;margin:8px 0;padding:10px 14px}.faq summary{cursor:pointer;font-weight:600}.faq details p{color:var(--ink-soft);margin:8px 0 2px}.tool-search{margin:18px 0 8px}.tool-search input{background:var(--paper);border:1px solid #b9c2cf;border-radius:8px;width:100%;max-width:420px;padding:11px 14px;font-size:1rem}.tool-search input:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:var(--accent)}.tool-group{margin:26px 0 8px}.tool-group h2{color:var(--ink);margin:0;font-size:1.1rem}.group-blurb{color:var(--ink-soft);margin:2px 0 8px;font-size:.85rem}.tool-list{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:10px;margin-top:10px;display:grid}.tool-card{border:1px solid var(--line);border-radius:var(--radius);color:var(--ink);background:var(--paper);padding:14px 16px;text-decoration:none;display:block}.tool-card:hover{border-color:var(--accent);background:var(--accent-soft)}.tool-card .t{font-weight:700}.tool-card .d{color:var(--ink-soft);font-size:.88rem}.safety-note{color:#92400e;background:#fffbeb;border:1px solid #fde68a;border-radius:8px;margin:0 0 20px;padding:10px 14px;font-size:.88rem}.breadcrumbs{color:var(--ink-soft);margin-bottom:14px;font-size:.82rem}.breadcrumbs a{color:var(--ink-soft)}.no-results{color:var(--ink-soft);padding:24px 0}h1{margin:0 0 6px;font-size:1.7rem;line-height:1.25}.tagline{color:var(--ink-soft);margin:0 0 8px;font-size:1rem}