:root{
  --ink:#1d2a22; --muted:#5b6b60; --line:#e3e8e0; --bg:#fbfaf6; --panel:#ffffff;
  --green:#2f5d3a; --green-2:#3f7a4c; --leaf:#c9e4a5; --sand:#f3ecdc; --amber:#c8791e;
  --radius:14px; --shadow:0 1px 2px rgba(20,40,25,.06),0 6px 20px rgba(20,40,25,.06);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font:17px/1.65 ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg)}
a{color:var(--green-2)}
a:hover{color:var(--green)}
img{max-width:100%;height:auto}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px}.skip:focus{left:10px;top:10px;background:#fff;padding:8px;z-index:10}

/* header */
.site-header{background:var(--panel);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:64px;flex-wrap:wrap}
.logo{display:flex;align-items:center;gap:9px;text-decoration:none;color:var(--ink);font-size:21px;letter-spacing:-.01em}
.logo b{color:var(--green)}
.logo-mark{width:30px;height:30px}
.site-header nav{display:flex;gap:4px;flex-wrap:wrap}
.site-header nav a{text-decoration:none;color:var(--ink);padding:7px 12px;border-radius:999px;font-size:15px;font-weight:500}
.site-header nav a:hover,.site-header nav a.active{background:var(--sand);color:var(--green)}

/* page head */
.page-head{background:linear-gradient(180deg,#eef4e6,var(--bg));border-bottom:1px solid var(--line);padding:34px 0 26px}
.page-head h1{font-size:clamp(30px,4.2vw,44px);line-height:1.15;margin:6px 0 10px;letter-spacing:-.02em;max-width:820px}
.lede{font-size:19px;color:var(--muted);max-width:760px;margin:0 0 8px}
.meta{font-size:14px;color:var(--muted);margin:6px 0 0}
.crumbs{font-size:14px;color:var(--muted)}
.crumbs a{color:var(--muted);text-decoration:none}

/* layout */
main{padding:34px 20px 60px}
.article-grid{display:grid;grid-template-columns:240px minmax(0,1fr);gap:44px;align-items:start}
.toc{position:sticky;top:88px;font-size:14px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px}
.toc h4{margin:0 0 8px;font-size:13px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}
.toc ol{margin:0;padding-left:18px}.toc li{margin:5px 0}.toc a{text-decoration:none;color:var(--ink)}
.toc a:hover{color:var(--green)}
.prose{max-width:760px}
.page .prose{max-width:860px;margin:0 auto}
.prose h2{font-size:28px;line-height:1.25;margin:44px 0 12px;letter-spacing:-.01em;scroll-margin-top:84px}
.prose h3{font-size:21px;margin:30px 0 8px;scroll-margin-top:84px}
.prose p,.prose li{color:#26342b}
.prose table{width:100%;border-collapse:collapse;margin:18px 0;font-size:15.5px;background:var(--panel);border-radius:10px;overflow:hidden;box-shadow:var(--shadow)}
.prose th,.prose td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.prose th{background:#eef4e6;font-weight:600}
.prose blockquote{margin:20px 0;padding:14px 18px;background:var(--sand);border-left:4px solid var(--amber);border-radius:8px}
.prose blockquote p{margin:0}
.callout{background:#eef4e6;border:1px solid #d5e5c4;border-radius:var(--radius);padding:16px 20px;margin:22px 0}
.callout.warn{background:#fdf3e4;border-color:#f0d9b1}
.callout p{margin:.3em 0}
.disclosure{font-size:14px;color:var(--muted);background:var(--panel);border:1px dashed var(--line);border-radius:10px;padding:10px 14px}
.quick{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px;margin:18px 0 8px}
.quick div{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:12px 14px}
.quick span{display:block;font-size:12.5px;text-transform:uppercase;letter-spacing:.05em;color:var(--muted)}
.quick strong{font-size:16px}

/* product */
.product{position:relative;display:flex;gap:18px;align-items:center;justify-content:space-between;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;margin:16px 0;box-shadow:var(--shadow)}
.product h4{margin:0 0 4px;font-size:18px}.product p{margin:0;font-size:15px;color:var(--muted)}
.badge{position:absolute;top:-11px;left:16px;background:var(--green);color:#fff;font-size:12px;font-weight:600;padding:2px 10px;border-radius:999px}
.btn{display:inline-block;white-space:nowrap;background:var(--amber);color:#fff !important;text-decoration:none;font-weight:600;padding:10px 18px;border-radius:999px}
.btn:hover{filter:brightness(.95)}
.btn.alt{background:var(--green)}

/* cards */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px;margin:20px 0}
.card{display:flex;flex-direction:column;overflow:hidden;padding:0 !important;text-decoration:none;color:var(--ink);background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;box-shadow:var(--shadow);transition:transform .12s}
.card:hover{transform:translateY(-2px);color:var(--ink)}
.card h3{margin:6px 0 6px;font-size:19px}.card p{margin:0;font-size:15px;color:var(--muted)}
.card-tag{font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--amber)}

/* home */
.hero{padding:30px 0 10px}
.hero h1{font-size:clamp(34px,5vw,56px);line-height:1.08;letter-spacing:-.03em;margin:0 0 14px;max-width:780px}
.hero p{font-size:20px;color:var(--muted);max-width:640px}
.hero .actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
.section-title{font-size:26px;margin:40px 0 4px}

/* tool */
.tool{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);margin:20px 0}
.tool .row{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin-bottom:14px}
.tool label{display:block;font-size:14px;font-weight:600;margin-bottom:4px}
.tool select,.tool input{width:100%;font:inherit;padding:10px 12px;border:1px solid #cfd8cc;border-radius:10px;background:#fff}
.result{margin-top:16px;padding:16px 18px;border-radius:12px;display:none}
.result.ok{display:block;background:#eaf5e4;border:1px solid #c6e2b5}
.result.min{display:block;background:#fdf3e4;border:1px solid #f0d9b1}
.result.bad{display:block;background:#fbe9e7;border:1px solid #f1c4bd}
.result h3{margin:0 0 6px}

/* footer */
.site-footer{background:#1f3326;color:#d9e5d6;padding:40px 0 20px;margin-top:40px}
.site-footer .wrap{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:28px}
.site-footer .logo{color:#fff}.site-footer .logo b{color:var(--leaf)}
.site-footer h4{color:#fff;margin:0 0 8px;font-size:15px}
.site-footer a{display:block;color:#d9e5d6;text-decoration:none;font-size:15px;margin:4px 0}
.site-footer a:hover{color:#fff}
.site-footer p{font-size:15px}
.site-footer .fine{display:block;font-size:13px;color:#a9bba6;border-top:1px solid #34503c;padding-top:16px;margin-top:26px}

@media (max-width:900px){
  .article-grid{grid-template-columns:1fr;gap:20px}
  .toc{display:none}
  .site-footer .wrap{grid-template-columns:1fr 1fr}
}
@media (max-width:560px){
  body{font-size:16.5px}
  .product{flex-direction:column;align-items:flex-start}
  .site-footer .wrap{grid-template-columns:1fr}
  .site-header nav a{padding:6px 9px;font-size:14px}
}

/* images */
.card img,.card-ph{width:100%;aspect-ratio:3/2;object-fit:cover;display:block;background:#eef4e6}
.card-ph{display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#eef4e6,#d9e9c8)}
.card-ph .logo-mark{width:64px;height:64px;opacity:.85}
.card-body{padding:16px 20px 20px}
.lead-img{margin:0 0 24px}
.lead-img img{width:100%;aspect-ratio:3/2;object-fit:cover;border-radius:var(--radius);box-shadow:var(--shadow);display:block}
.hero{display:grid;grid-template-columns:1.05fr 1fr;gap:36px;align-items:center}
.hero-img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:20px;box-shadow:var(--shadow)}
.page .prose:has(.hero){max-width:1080px}
@media (max-width:900px){.hero{grid-template-columns:1fr}.hero-img{order:-1;aspect-ratio:16/9}}