:root{--g:#0f7b4a;--g2:#0b5e38;--g3:#e8f5ee;--g4:#f4faf6;--ink:#17231c;--mut:#55645b;--line:#dbe6df;--bg:#fff;--warn:#9a4b00;--warnbg:#fff4e5;--r:14px;--sh:0 1px 2px rgba(16,40,28,.06),0 6px 24px rgba(16,40,28,.06)}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;color:var(--ink);background:var(--bg)}
a{color:var(--g)}a:hover{color:var(--g2)}
img,svg{max-width:100%}
.skip{position:absolute;left:-999px;top:0;background:var(--g);color:#fff;padding:.5rem 1rem;z-index:10}.skip:focus{left:0}
.wrap{max-width:1120px;margin:0 auto;padding:0 1rem}
header.site{border-bottom:1px solid var(--line);background:#fff;position:sticky;top:0;z-index:5}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:60px}
.logo{display:flex;align-items:center;gap:.5rem;font-weight:800;font-size:1.25rem;color:var(--ink);text-decoration:none;letter-spacing:-.02em}
.logo svg{width:30px;height:30px}
nav.top ul{display:flex;gap:1.1rem;list-style:none;margin:0;padding:0;flex-wrap:wrap}
nav.top a{text-decoration:none;color:var(--mut);font-weight:600;font-size:.95rem}nav.top a:hover{color:var(--g)}
@media (max-width:640px){nav.top .hide-sm{display:none}}
.crumbs{font-size:.875rem;color:var(--mut);margin:1rem 0 .25rem}.crumbs a{color:var(--mut)}
h1{font-size:clamp(1.6rem,4vw,2.3rem);line-height:1.2;letter-spacing:-.02em;margin:.25rem 0 .5rem}
h2{font-size:1.3rem;line-height:1.3;margin:1.8rem 0 .5rem}
.lead{color:var(--mut);font-size:1.05rem;margin:0 0 1.25rem;max-width:70ch}
/* calculator layout */
.calc-grid{display:grid;gap:1.25rem;grid-template-columns:1fr}
@media (min-width:900px){.calc-grid{grid-template-columns:minmax(0,1fr) minmax(0,1.1fr)}}
.panel{border:1px solid var(--line);border-radius:var(--r);padding:1.25rem;background:#fff;box-shadow:var(--sh)}
.panel.result{background:var(--g4);border-color:#cfe5d8}
form.calc{display:grid;gap:.9rem;grid-template-columns:1fr 1fr}
form.calc .field{display:flex;flex-direction:column;gap:.3rem;min-width:0}
form.calc .field.full,form.calc .actions{grid-column:1/-1}
@media (max-width:480px){form.calc{grid-template-columns:1fr}}
label{font-weight:600;font-size:.9rem}
.help{font-size:.8rem;color:var(--mut)}
.inp{display:flex;align-items:stretch;border:1px solid #c7d6cd;border-radius:10px;background:#fff;overflow:hidden}
.inp:focus-within{border-color:var(--g);box-shadow:0 0 0 3px rgba(15,123,74,.18)}
.inp span{display:flex;align-items:center;padding:0 .6rem;background:var(--g4);color:var(--mut);font-weight:600}
.inp input,.inp select{flex:1;min-width:0;border:0;padding:.65rem .7rem;font:inherit;color:inherit;background:transparent;outline:none}
.inp select{appearance:auto}
.actions{display:flex;gap:.6rem}
.btn{appearance:none;border:0;border-radius:10px;padding:.7rem 1.2rem;font:inherit;font-weight:700;cursor:pointer;background:var(--g);color:#fff}
.btn:hover{background:var(--g2)}.btn.ghost{background:#fff;color:var(--g);border:1px solid var(--line)}
.btn:focus-visible,a:focus-visible,.inp select:focus-visible{outline:3px solid #f2b950;outline-offset:2px}
.result-main{border-bottom:1px solid #cfe5d8;padding-bottom:.9rem;margin-bottom:.9rem}
.result-label{font-weight:600;color:var(--mut)}
.result-value{font-size:clamp(2rem,6vw,2.6rem);font-weight:800;color:var(--g2);letter-spacing:-.02em;line-height:1.15;word-break:break-word}
.result-sub{color:var(--mut)}
.rows{margin:0}.rows div{display:flex;justify-content:space-between;gap:1rem;padding:.45rem 0;border-bottom:1px dashed #d4e6da}
.rows dt{color:var(--mut)}.rows dd{margin:0;font-weight:700;text-align:right}
.bar{display:flex;height:14px;border-radius:7px;overflow:hidden;margin:.25rem 0 .6rem;background:#e6efe9}
.legend{list-style:none;padding:0;margin:0 0 .75rem;display:flex;flex-wrap:wrap;gap:.35rem 1rem;font-size:.85rem;color:var(--mut)}
.legend i{display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:.35rem;vertical-align:middle}
.warn{background:var(--warnbg);color:var(--warn);border-radius:10px;padding:.6rem .8rem;font-weight:600}
.note{font-size:.85rem;color:var(--mut)}
.table-wrap{overflow-x:auto;margin-top:.75rem}
table{border-collapse:collapse;width:100%;font-size:.9rem;background:#fff}
caption{text-align:left;font-weight:700;padding:.4rem 0}
th,td{padding:.45rem .6rem;border-bottom:1px solid var(--line);text-align:right;white-space:nowrap}
th:first-child,td:first-child{text-align:left}
thead th{background:var(--g3);color:var(--g2)}
details.schedule{margin-top:.75rem}details.schedule summary{cursor:pointer;font-weight:700;color:var(--g)}
/* article */
.content{max-width:760px}
.content code{background:var(--g4);border:1px solid var(--line);border-radius:6px;padding:.05rem .35rem;font-size:.92em;white-space:nowrap}
.faq details{border:1px solid var(--line);border-radius:10px;padding:.7rem 1rem;margin:.5rem 0;background:#fff}
.faq summary{cursor:pointer;font-weight:700}
.faq p{margin:.5rem 0 0}
.disclaimer-box{font-size:.85rem;color:var(--mut);border-left:3px solid var(--line);padding-left:.8rem;margin:1.5rem 0}
.layout{display:grid;gap:2rem;grid-template-columns:1fr;margin-bottom:2rem}
@media (min-width:1000px){.layout{grid-template-columns:minmax(0,1fr) 300px}}
aside.side h2{font-size:1.05rem;margin-top:0}
aside.side ul{list-style:none;padding:0;margin:0}aside.side li{border-bottom:1px solid var(--line)}
aside.side li a{display:block;padding:.5rem 0;text-decoration:none;font-weight:600}
/* ad slots: empty placeholders, collapse to nothing until AdSense code is added */
.ad-slot{margin:1.25rem 0}.ad-slot:empty{margin:0}
/* home */
.hero{background:linear-gradient(180deg,var(--g3),#fff);border-bottom:1px solid var(--line);padding:2.5rem 0 2rem}
.hero h1{max-width:20ch}
.search{display:flex;max-width:560px;border:2px solid var(--g);border-radius:12px;background:#fff;overflow:hidden}
.search input{flex:1;border:0;padding:.85rem 1rem;font:inherit;font-size:1.05rem;outline:none;min-width:0}
.search svg{width:22px;margin:0 .8rem;color:var(--g)}
.chips{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:.9rem}
.chips button{border:1px solid #cfe5d8;background:#fff;border-radius:999px;padding:.3rem .8rem;font:inherit;font-size:.85rem;cursor:pointer;color:var(--g2)}
.cat-section h2{display:flex;align-items:center;gap:.5rem}
.cards{display:grid;gap:.9rem;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));padding:0;margin:0;list-style:none}
.card a{display:block;height:100%;border:1px solid var(--line);border-radius:var(--r);padding:1rem;text-decoration:none;color:var(--ink);background:#fff;transition:border-color .15s,box-shadow .15s}
.card a:hover{border-color:var(--g);box-shadow:var(--sh)}
.card b{display:block;color:var(--g2);margin-bottom:.2rem}.card span{color:var(--mut);font-size:.9rem}
footer.site{border-top:1px solid var(--line);background:var(--g4);margin-top:3rem;padding:2rem 0;font-size:.9rem;color:var(--mut)}
footer.site .cols{display:grid;gap:1.5rem;grid-template-columns:repeat(auto-fit,minmax(180px,1fr))}
footer.site h2{font-size:.95rem;margin:0 0 .5rem;color:var(--ink)}
footer.site ul{list-style:none;padding:0;margin:0}footer.site li{margin:.25rem 0}
footer.site a{color:var(--mut)}
.prose{max-width:760px;margin-bottom:2rem}
[hidden]{display:none!important}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}
.logo svg{flex:0 0 30px}
nav.top a{white-space:nowrap}
.panel,#result{scroll-margin-top:76px}
@media (max-width:640px){nav.top ul{gap:.8rem;flex-wrap:nowrap}nav.top a{font-size:.88rem}.logo{font-size:1.1rem}nav.top span.hide-sm{display:none}}