:root{color-scheme:light;--bg:#f7f4ea;--surface:#fffdf7;--text:#25372e;--muted:#5c665e;--line:#d8ddd0;--forest:#173c31;--lime:#dceb83;--field:#fffef9;--result:#eaf0d9;--shadow:0 20px 70px #173c310e;--focus:#47725d}
:root[data-theme=dark]{color-scheme:dark;--bg:#15241e;--surface:#1e3028;--text:#f1f3e8;--muted:#bbc8bc;--line:#42564a;--forest:#dceb83;--field:#17261f;--result:#2c412e;--shadow:0 20px 70px #0002;--focus:#dceb83}
@media(prefers-color-scheme:dark){:root[data-theme=system]{color-scheme:dark;--bg:#15241e;--surface:#1e3028;--text:#f1f3e8;--muted:#bbc8bc;--line:#42564a;--forest:#dceb83;--field:#17261f;--result:#2c412e;--shadow:0 20px 70px #0002;--focus:#dceb83}}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.6 system-ui,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif}a{color:inherit;text-underline-offset:4px}button,input,select{font:inherit}button,a,input,select{touch-action:manipulation}a,button,input,select{outline-offset:5px}:focus-visible{outline:3px solid var(--focus)}.skip{position:absolute;top:-100px;left:20px;background:var(--lime);color:#173c31;padding:12px;z-index:10}.skip:focus{top:10px}.wrap{max-width:1216px;margin:auto;padding:0 40px}.header{min-height:104px;display:flex;align-items:center;gap:38px;border-bottom:1px solid var(--line)}.brand{font:bold 36px Georgia,serif;letter-spacing:-2px;text-decoration:none;color:var(--forest);display:flex;align-items:center;gap:6px}.spark{color:#708339;background:var(--lime);border-radius:50%;font:22px Georgia;width:29px;height:29px;display:grid;place-items:center;letter-spacing:0}.header nav{display:flex;gap:28px;margin-left:auto}.header nav a{font-size:14px;text-decoration:none}.theme{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--muted)}.theme select{font-size:13px;padding:8px 26px 8px 10px;width:auto}.hero{display:grid;grid-template-columns:1.1fr 1fr;gap:70px;padding:76px 0 64px;align-items:center}.eyebrow{text-transform:uppercase;font-weight:650;letter-spacing:2px;font-size:11px;color:var(--muted);margin:0 0 20px;display:flex;align-items:center;gap:10px}.eyebrow:before{content:'';width:24px;height:1px;background:currentColor}h1,h2,h3{font-family:Georgia,'Times New Roman',serif;font-weight:400;line-height:1.07;letter-spacing:-1.4px;color:var(--forest)}h1{font-size:clamp(48px,5.2vw,72px);margin:0 0 24px}.hero h1 em{font-weight:400}.lede{font-size:18px;max-width:440px;color:var(--muted);margin-bottom:28px}.actions{display:flex;align-items:center;gap:22px;flex-wrap:wrap}.button,button{border:1px solid transparent;border-radius:9px;background:#173c31;color:#f7f4ea;padding:13px 21px;text-decoration:none;font-weight:600;font-size:14px;cursor:pointer}.button.lime,form button{background:var(--lime);color:#173c31}.text-link{font-size:14px}.micro{font-size:12px;color:var(--muted);margin-top:23px}.preview{background:var(--surface);border:1px solid var(--line);border-radius:17px;padding:28px;box-shadow:var(--shadow);position:relative}.preview:before{content:'';position:absolute;inset:14px -13px -13px 14px;border:1px solid var(--line);border-radius:17px;z-index:-1}.tool-heading{display:flex;align-items:center;gap:13px;margin-bottom:21px}.icon{height:43px;width:43px;border-radius:12px;display:grid;place-items:center;background:var(--result);color:var(--forest);flex-shrink:0}.icon svg{width:23px;height:23px;stroke:currentColor;fill:none;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}.tool-heading h2{font-size:26px;letter-spacing:-.7px;margin:0}.tool-heading p{margin:3px 0 0;font-size:12px;color:var(--muted)}.fields{display:grid;grid-template-columns:1fr 1fr;gap:15px}.field{display:block;font-size:12px;font-weight:600}.field input,.field select{margin-top:6px}input,select{width:100%;min-height:44px;background:var(--field);border:1px solid var(--line);border-radius:7px;color:var(--text);padding:9px 12px}form button{width:100%;margin-top:20px}.result{background:var(--result);border-radius:10px;padding:20px;margin-top:18px}.result strong{font-family:Georgia,serif;font-size:36px;font-weight:400;color:var(--forest);line-height:1.2}.result p{font-size:12px;margin:8px 0 0;color:var(--muted)}.error{color:var(--text);font-weight:600;font-size:14px}.error:empty{display:none}.section{padding:48px 0;border-top:1px solid var(--line)}.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:28px}.section h2{font-size:37px;margin:0}.section-head p{font-size:13px;color:var(--muted);margin:0}.categories{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.category{display:flex;gap:13px;align-items:center;padding:18px 20px;border:1px solid var(--line);border-radius:10px;text-decoration:none;font-size:14px}.category:hover,.card:hover{border-color:var(--forest)}.category .icon{width:30px;height:30px;background:transparent}.search-row{display:grid;grid-template-columns:2fr 1fr;gap:16px;margin-bottom:8px}.search-row label{font-size:12px;color:var(--muted)}.search-row input,.search-row select{margin-top:6px}#search-status{font-size:12px;color:var(--muted);margin:8px 0 22px}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.card{border:1px solid var(--line);border-radius:12px;padding:25px;background:var(--surface);text-decoration:none;display:flex;flex-direction:column;align-items:start;min-height:240px}.card h3{font-size:25px;letter-spacing:-.5px;margin:22px 0 10px}.card p{font-size:13px;color:var(--muted);margin:0 0 20px}.card span:last-child{font-size:13px;margin-top:auto;color:var(--forest)}[hidden]{display:none!important}.note-band{background:var(--result);border-radius:14px;padding:34px 40px;display:flex;justify-content:space-between;align-items:center;gap:30px;margin:32px 0 55px}.note-band h2{font-size:29px;margin:0 0 10px}.note-band p{font-size:14px;max-width:620px;margin:0;color:var(--muted)}footer{border-top:1px solid var(--line);padding:32px 0}.footer-row{display:flex;gap:30px;justify-content:space-between;align-items:center}.footer-row p{font-size:12px;color:var(--muted)}.footer-row nav{display:flex;gap:22px;font-size:12px}.page-intro{padding:46px 0 30px}.breadcrumb{font-size:12px;color:var(--muted);margin-bottom:26px}.page-intro h1{font-size:52px}.page-intro .lede{max-width:700px}.tool-layout{display:grid;grid-template-columns:1.05fr 1fr;gap:48px;align-items:start;margin-bottom:56px}.explanation h2{font-size:29px;margin-top:5px}.explanation h3,.prose h2{font-size:25px;margin:28px 0 14px}.explanation p,.explanation li,.prose p{color:var(--muted);font-size:15px}.formula{background:var(--result);padding:18px;border-radius:10px;font-family:ui-monospace,monospace;font-size:13px;color:var(--text)}details{padding:17px 0;border-bottom:1px solid var(--line)}summary{cursor:pointer;font-size:14px;font-weight:600}details p{margin-bottom:0}.prose{max-width:760px;margin:0 0 70px}.related{display:flex;flex-wrap:wrap;gap:18px;font-size:14px}.nojs{padding:15px;background:var(--lime);color:#173c31}
@media(max-width:900px){.wrap{padding:0 24px}.header{gap:20px}.header nav{gap:18px}.hero{gap:32px}h1{font-size:53px}.preview{padding:22px}.categories{grid-template-columns:1fr 1fr}.cards{grid-template-columns:1fr 1fr}.tool-layout{gap:28px}.theme>span{display:none}}
@media(max-width:650px){.wrap{padding:0 20px}.header{padding:20px 0;min-height:0;flex-wrap:wrap;gap:15px}.brand{font-size:32px}.header nav{order:3;width:100%;margin:0;justify-content:space-between}.theme{margin-left:auto}.hero{display:block;padding:45px 0}.hero h1{font-size:53px;max-width:440px}.lede{font-size:16px}.preview{margin-top:32px}.hero .preview:before{inset:9px -7px -8px 9px}.section{padding:35px 0}.section-head{display:block}.section-head p{margin-top:12px}.section h2{font-size:32px}.categories{gap:10px}.category{padding:15px 11px;gap:6px;font-size:12px}.cards{grid-template-columns:1fr}.card{min-height:210px}.card h3{margin-top:17px}.search-row{grid-template-columns:1fr}.note-band{padding:25px;display:block}.note-band>a{display:inline-block;margin-top:20px}.footer-row{align-items:start;flex-direction:column;gap:8px}.tool-layout{grid-template-columns:1fr;gap:32px}.tool-layout .preview{margin-top:0}.page-intro h1{font-size:43px}.fields{gap:12px}.field{font-size:11px}.result strong{font-size:31px}.page-intro{padding-top:30px}.section-head h2{font-size:32px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
.tire-help{grid-column:1/-1;font-size:12px;color:var(--muted);margin:0}.tire-help code{overflow-wrap:anywhere}.tire-actions{display:flex;gap:10px}.tire-actions button{margin-top:10px;background:transparent;border-color:var(--line);color:var(--text)}.tire-figure{margin:22px 0}.tire-figure svg{display:block;width:100%;height:auto}.tire-outline{fill:var(--forest);stroke:var(--forest);stroke-width:2}.tire-rim{fill:var(--surface);stroke:var(--surface);stroke-width:2}.tire-mark{stroke:var(--forest);stroke-width:2}.tire-label{fill:var(--text);font:15px system-ui,sans-serif}.tire-figure figcaption{font-size:12px;color:var(--muted)}.tire-table{width:100%;border-collapse:collapse;table-layout:fixed;font-size:12px;font-variant-numeric:tabular-nums}.tire-table caption{text-align:left;margin-bottom:8px;font-weight:600}.tire-table th,.tire-table td{text-align:left;border-bottom:1px solid var(--line);padding:9px 4px;overflow-wrap:anywhere;vertical-align:top}.tire-table th:first-child{width:38%}.tire-table th{font-weight:600}.tire-table td{color:var(--text)}.tool-layout>*{min-width:0}.categories{grid-template-columns:repeat(auto-fit,minmax(185px,1fr))}@media(max-width:650px){.categories{grid-template-columns:1fr 1fr}.tire-table{font-size:11px}[data-calculator=tire] .fields{grid-template-columns:1fr}[data-calculator=tire] .result{padding:14px}[data-calculator=tire] .result>strong{font-size:27px}}