:root { color-scheme:light; --bg:#f8f6ef; --paper:#fffcf5; --green:#22483a; --dark:#17352b; --sub:#4e6257; --line:#d9dfd2; --warm:#ae542f; font-family:Tahoma, "Segoe UI", Arial, sans-serif; }
* { box-sizing:border-box; }
html { scroll-behavior:smooth; }
body { margin:0; background:var(--bg); color:var(--dark); font-size:16px; line-height:1.85; }
a { color:inherit; text-underline-offset:.2em; }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible { outline:3px solid #b66039; outline-offset:4px; }
.shell { width:min(1130px,calc(100% - 48px)); margin-inline:auto; }
.header,.footer { display:flex; align-items:center; justify-content:space-between; gap:18px; padding-block:17px; }
.header { border-bottom:1px solid var(--line); }
.brand { color:var(--green); text-decoration:none; font-weight:900; font-size:1.42rem; white-space:nowrap; }
.mark { display:inline-grid; place-items:center; background:var(--green); color:#f4d38d; width:32px; height:32px; border-radius:50%; font-size:1.08rem; vertical-align:middle; }
nav { display:flex; gap:clamp(12px,4vw,36px); font-size:.92rem; font-weight:700; }
nav a { text-decoration:none; }
nav a:hover,.read:hover { text-decoration:underline; }
.skip { position:fixed; inset-block-start:8px; inset-inline-start:8px; transform:translateY(-200%); padding:8px 12px; z-index:3; background:var(--paper); }
.skip:focus { transform:translateY(0); }
.hero { display:grid; grid-template-columns:1.05fr 1fr; gap:clamp(28px,7vw,92px); align-items:center; padding-block:clamp(38px,7vw,90px); }
.eyebrow { font-size:.78rem; font-weight:800; color:var(--warm); margin:0 0 .75em; }
.dot { display:inline-block; width:8px; height:8px; border-radius:50%; background:var(--warm); margin-inline-end:5px; }
h1,h2,h3,p { margin-block-start:0; }
h1,h2,h3 { line-height:1.38; }
h1 { font-size:clamp(2.7rem,6vw,5.25rem); letter-spacing:-.06em; margin-block-end:17px; }
h1 em { font-style:normal; color:var(--warm); }
h2 { font-size:clamp(1.7rem,3vw,2.55rem); margin-block-end:12px; }
.lede { font-size:clamp(1rem,1.7vw,1.2rem); color:var(--sub); max-width:34ch; margin-block-end:23px; }
.art { position:relative; }
.art svg { width:100%; height:auto; display:block; }
.art span { position:absolute; inset-block-end:8%; inset-inline-start:6%; color:#fff2d0; font-size:.72rem; }
.button { display:inline-flex; gap:13px; align-items:center; background:var(--green); color:#fffaf0; border:0; padding:10px 18px; border-radius:7px; font:inherit; font-weight:700; text-decoration:none; cursor:pointer; }
.button:hover { background:#356250; }
.tool { display:grid; grid-template-columns:.8fr 1.2fr; gap:clamp(24px,5vw,62px); background:#edf1e5; border:1px solid #d7dfce; border-radius:21px; padding:clamp(23px,5vw,48px); }
.tool p { color:var(--sub); }
.tool--single { grid-template-columns:1fr; }
.fields { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:12px; margin-block-end:14px; }
label { display:flex; flex-direction:column; justify-content:space-between; gap:7px; font-size:.8rem; font-weight:700; line-height:1.5; }
.unit { width:min(100%,180px); margin-block-end:15px; }
input, select { min-width:0; width:100%; padding:10px; border-radius:6px; border:1px solid #a9b9aa; background:var(--paper); color:var(--dark); font:inherit; }
.result { margin:12px 0 0; font-weight:700; min-height:1.85em; }
.articles { padding-block:50px 65px; }
.cards { display:grid; grid-template-columns:repeat(auto-fit,minmax(210px,1fr)); gap:16px; }
.card { display:flex; flex-direction:column; background:var(--paper); padding:20px; border:1px solid var(--line); border-radius:12px; }
.card h3 { margin-block-end:10px; font-size:1.2rem; }
.card h3 a { text-decoration:none; }
.card h3 a:hover { text-decoration:underline; }
.card p:not(.eyebrow) { color:var(--sub); }
.number { font-weight:800; color:var(--green); background:#edf1e5; align-self:flex-start; padding:3px 8px; border-radius:6px; margin-block-end:13px; }
.read { font-size:.92rem; font-weight:800; text-decoration:none; color:var(--green); }
.card .read { margin-block-start:auto; }
.footer { border-top:1px solid var(--line); color:var(--sub); font-size:.85rem; }
.footer .brand { font-size:1.05rem; }
.story { width:min(100%,720px); margin:0 auto; padding-block:42px 70px; }
.story h1 { font-size:clamp(2.2rem,5vw,4rem); }
.story .lede { max-width:none; }
.story h2 { font-size:1.55rem; }
.story section { margin-block:28px; }
.story .reference { font-size:.9rem; }
.back { display:inline-block; margin-block-end:27px; }
@media (max-width:770px) { .hero,.tool { grid-template-columns:1fr; } .art { max-width:480px; } .cards { grid-template-columns:1fr; } }
@media (max-width:460px) { .shell { width:calc(100% - 30px); } .fields { grid-template-columns:1fr; } .footer { flex-wrap:wrap; } }
@media (prefers-reduced-motion:reduce) { html { scroll-behavior:auto; } }