:root{--green:#1f5f35;--green2:#2f7d46;--leaf:#eef6e9;--leaf2:#f6fbf2;--soil:#5b432c;--ink:#172017;--muted:#5b685b;--line:#d7e3d2;--card:#fff;--bg:#f8fbf5;--warn:#fff7dd;--blue:#eef6ff;--shadow:0 10px 28px rgba(34,64,30,.07)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,Roboto,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--bg);line-height:1.6}a{color:var(--green);text-decoration:none}a:hover{text-decoration:underline}.site-header{background:rgba(255,255,255,.96);backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}.nav{max-width:1180px;margin:auto;padding:14px 18px;display:flex;gap:18px;align-items:center;justify-content:space-between}.brand{font-weight:850;font-size:1.22rem;color:var(--green);letter-spacing:-.02em}.navlinks{display:flex;gap:12px;flex-wrap:wrap}.navlinks a{font-size:.94rem;color:#29452e;font-weight:650}.nav-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:999px;padding:8px 12px;font:inherit;color:var(--green)}.hero,.container{max-width:1180px;margin:auto;padding:34px 18px}.hero{display:grid;gap:22px}.hero-panel{background:linear-gradient(135deg,#fff 0%,#f2faee 52%,#edf7e8 100%);border-bottom:1px solid var(--line)}.eyebrow{color:var(--soil);font-weight:800;letter-spacing:.055em;text-transform:uppercase;font-size:.78rem}.kicker{display:flex;gap:8px;flex-wrap:wrap;margin-top:18px}.kicker .pill{background:#fff}.breadcrumbs{font-size:.92rem;color:var(--muted);margin-bottom:18px}.breadcrumbs a{color:var(--muted)}h1{font-size:clamp(2.05rem,6vw,4.6rem);line-height:1.02;margin:0 0 14px;letter-spacing:-.05em}h2{font-size:clamp(1.35rem,4vw,2.15rem);line-height:1.15;margin:36px 0 12px;letter-spacing:-.025em}h3{margin:20px 0 8px;line-height:1.25}.lede{font-size:1.14rem;color:var(--muted);max-width:820px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(245px,1fr));gap:18px}.grid.tight{grid-template-columns:repeat(auto-fit,minmax(210px,1fr))}.card,.calc-card,.note,.source-box,.toc,.stat-card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:18px;box-shadow:var(--shadow)}a.card{display:block;color:inherit}.card h3,.stat-card h3{margin-top:0}.card p:last-child{margin-bottom:0}.calc-card{background:linear-gradient(180deg,#fff,#f4faf0)}.note.warning{background:var(--warn);border-left:5px solid #d6a923}.note.blue{background:var(--blue)}label{font-weight:750;display:block;margin:12px 0 6px}input,select{width:100%;padding:12px 13px;border:1px solid #bfd0b8;border-radius:12px;font:inherit;background:#fff}input:focus,select:focus{outline:3px solid rgba(47,125,70,.18);border-color:var(--green2)}.result{margin-top:16px;padding:16px;border-radius:14px;background:var(--leaf);font-weight:850;color:var(--green);font-size:1.12rem;letter-spacing:.01em}.muted{color:var(--muted)}.small{font-size:.93rem}.formula{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px;overflow:auto}.table-wrap{overflow:auto;background:#fff;border:1px solid var(--line);border-radius:18px;margin:18px 0;box-shadow:var(--shadow)}table{border-collapse:collapse;width:100%;min-width:760px}th,td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}th{background:var(--leaf);color:#203f28;font-size:.9rem;white-space:nowrap}tr:last-child td{border-bottom:0}tbody tr:hover{background:#fbfdf9}.pill{display:inline-block;background:var(--leaf);border:1px solid var(--line);border-radius:999px;padding:4px 10px;font-size:.84rem;color:#35583a;font-weight:700}.two-col{display:grid;grid-template-columns:1.05fr .95fr;gap:22px;align-items:start}.split{display:grid;grid-template-columns:1fr 1fr;gap:18px}.toc ul,.source-box ul{margin:0;padding-left:1.1rem}.toc li,.source-box li{margin:.42rem 0}.source-box a{font-weight:750}.faq details{background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px 16px;margin:10px 0}.faq summary{font-weight:850;cursor:pointer}.footer{border-top:1px solid var(--line);background:#fff;margin-top:28px}.footer .container{padding:24px 18px;color:var(--muted);font-size:.93rem}.footer-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:16px;align-items:start}.cluster-label{margin-top:26px}.data-tag{font-size:.8rem;color:var(--muted);font-weight:700;text-transform:uppercase;letter-spacing:.05em}.callout-row{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.stat-card strong{display:block;font-size:1.9rem;line-height:1.1;color:var(--green);letter-spacing:-.03em}@media(max-width:820px){.nav{align-items:flex-start;flex-direction:column}.nav-toggle{display:inline-block;position:absolute;right:18px;top:10px}.navlinks{display:none;flex-direction:column;width:100%;gap:8px}.navlinks.open{display:flex}.two-col,.split,.footer-grid,.callout-row{grid-template-columns:1fr}table{min-width:680px}.hero,.container{padding:28px 16px}h1{letter-spacing:-.04em}}


/* v0.5 SEO/content upgrade */
.related-resources{margin:2rem 0;padding:1.25rem;border:1px solid var(--line);border-radius:18px;background:#f8fbf6}
.related-resources h2{margin-top:0}
.related-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:.8rem;margin-top:1rem}
.related-grid a{display:block;padding:1rem;border:1px solid var(--line);border-radius:14px;background:#fff;text-decoration:none;color:inherit}
.related-grid a:hover{border-color:#7a9d54;box-shadow:0 8px 20px rgba(35,64,38,.08)}
.related-grid strong{display:block;color:#234026;margin-bottom:.25rem}
.related-grid span{display:block;color:var(--muted);font-size:.92rem;line-height:1.35}
.table-meta{font-size:.92rem;color:var(--muted);margin:.75rem 0 1rem}