:root{--ink:#222;--muted:#555;--brand:#1f5c4a;--bg:#fbfaf7;--card:#fff;--line:#e3e0d8;--accent:#f4efe3}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.65;font-size:1.05rem}
a{color:#17614c}
a:hover,a:focus{color:#0d3d30}
:focus-visible{outline:3px solid #c77d00;outline-offset:2px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-9999px}.skip:focus{left:1rem;top:1rem;background:#fff;padding:.5rem;z-index:9}
header.site{background:var(--brand);color:#fff}
header.site .wrap{display:flex;flex-wrap:wrap;gap:.5rem 1.5rem;align-items:center;justify-content:space-between;padding:.8rem 1rem}
header.site a{color:#fff;text-decoration:none}
.logo{font-weight:700;font-size:1.15rem}
nav ul{list-style:none;margin:0;padding:0;display:flex;gap:1.1rem;flex-wrap:wrap}
nav a:hover,nav a:focus{text-decoration:underline}
.wrap{max-width:1040px;margin:0 auto;padding:0 1rem}
main .wrap{padding-top:1.25rem;padding-bottom:2rem}
article{max-width:740px}
h1{font-size:2rem;line-height:1.25;margin:.4rem 0 .6rem}
h2{font-size:1.4rem;margin:2rem 0 .6rem;line-height:1.3}
h3{font-size:1.15rem;margin:1.4rem 0 .4rem}
.meta,.crumbs{color:var(--muted);font-size:.92rem}
.crumbs ol{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:.3rem}
.crumbs li+li::before{content:"\203A";margin-right:.3rem}
ul.check{list-style:none;padding-left:0}
ul.check li{position:relative;padding-left:1.8rem;margin:.35rem 0}
ul.check li::before{content:"";position:absolute;left:0;top:.35rem;width:1.05rem;height:1.05rem;border:2px solid var(--brand);border-radius:3px;background:#fff}
.formula{background:var(--accent);border-left:4px solid var(--brand);padding:.7rem 1rem;font-weight:600}
table{border-collapse:collapse;width:100%;margin:1rem 0;font-size:.95rem;background:#fff;display:block;overflow-x:auto}
caption{text-align:left;font-weight:600;padding:.3rem 0;color:var(--muted)}
th,td{border:1px solid var(--line);padding:.45rem .6rem;text-align:left;vertical-align:top}
thead th{background:var(--accent)}
.tools{background:#fff;border:1px solid var(--line);border-radius:10px;padding:1rem 1.2rem;margin:2rem 0}
.tools h2{margin-top:.2rem}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:1rem}
.card{background:var(--card);border:1px solid var(--line);border-radius:10px;overflow:hidden;display:flex;flex-direction:column}
.card img{width:100%;height:auto;display:block;aspect-ratio:auto;background:#eee}
.card .in{padding:.8rem .9rem 1rem;display:flex;flex-direction:column;gap:.4rem;flex:1}
.card h3{font-size:1.02rem;margin:0;line-height:1.35}
.card p{margin:0;font-size:.93rem;color:#333}
.btn{display:inline-block;margin-top:auto;background:var(--brand);color:#fff!important;text-decoration:none;padding:.5rem .8rem;border-radius:6px;font-weight:600;font-size:.95rem;align-self:flex-start}
.btn:hover,.btn:focus{background:#0d3d30}
.note{font-size:.9rem;color:var(--muted)}
.guides{list-style:none;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:.8rem}
.guides li{background:#fff;border:1px solid var(--line);border-radius:10px;padding:.8rem 1rem}
.guides a{font-weight:600}
.guides p{margin:.3rem 0 0;font-size:.92rem;color:#444}
.hero{background:var(--accent);border-radius:12px;padding:1.4rem 1.4rem;margin:.5rem 0 1.5rem}
.hero p{max-width:680px}
footer{border-top:1px solid var(--line);color:var(--muted);font-size:.9rem;padding:1.4rem 0 2.4rem}
footer a{color:var(--muted)}
@media (max-width:560px){h1{font-size:1.6rem}body{font-size:1rem}}
@media print{header.site,footer,.tools .btn{display:none}}