:root{--bg:#fbfaf7;--ink:#1f2421;--dim:#5d6661;--line:#e6e2d9;--accent:#2f6f62;--soft:#eef3f0;--card:#fff}
@media (prefers-color-scheme:dark){:root{--bg:#141816;--ink:#e8ece9;--dim:#a3aea8;--line:#2a312d;--accent:#7cc4b2;--soft:#1c2320;--card:#19201c}}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;background:var(--bg);color:var(--ink);font:19px/1.7 Charter,"Iowan Old Style",Georgia,serif}
a{color:var(--accent)}.wrap{max-width:1080px;margin:0 auto;padding:0 18px}
.top{border-bottom:1px solid var(--line);background:var(--bg);position:sticky;top:0;z-index:5}.top .wrap{display:flex;align-items:center;gap:18px;min-height:58px;flex-wrap:wrap}
.brand{font:700 18px system-ui,-apple-system,sans-serif;color:var(--ink);text-decoration:none}nav{display:flex;gap:14px;flex-wrap:wrap;font:14px system-ui,sans-serif}nav a{color:var(--dim);text-decoration:none}nav a:hover{color:var(--accent)}
h1,h2,b{font-family:system-ui,-apple-system,"Segoe UI",sans-serif}h1{font-size:clamp(30px,5vw,44px);line-height:1.15;margin:28px 0 10px;letter-spacing:-.01em}h2{font-size:24px;margin:1.8em 0 .4em}
.hero{padding:34px 0 10px}.hero p{color:var(--dim);font-size:20px;max-width:680px}
article{max-width:720px;margin:0 auto}.crumbs,.by{font:14px system-ui,sans-serif;color:var(--dim)}.crumbs a,.by a{color:var(--dim)}
.answer{font-size:21px;background:var(--soft);border-left:4px solid var(--accent);padding:16px 20px;border-radius:0 12px 12px 0}
.video{position:relative;padding-top:56.25%;margin:28px 0}.video iframe{position:absolute;inset:0;width:100%;height:100%;border:0;border-radius:12px}
details{border-top:1px solid var(--line);padding:12px 0}summary{font:600 18px system-ui,sans-serif;cursor:pointer}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:18px;margin:22px 0 40px}
.card{display:flex;flex-direction:column;gap:6px;background:var(--card);border:1px solid var(--line);border-radius:14px;overflow:hidden;text-decoration:none;color:var(--ink);padding-bottom:14px}
.card img{width:100%;height:auto;aspect-ratio:16/9;object-fit:cover;background:var(--soft)}.card .cat{font:600 11px system-ui,sans-serif;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);padding:0 14px}
.card b{font-size:18px;line-height:1.3;padding:0 14px}.card .ex{font-size:15px;color:var(--dim);line-height:1.5;padding:0 14px}.card:hover{border-color:var(--accent)}
.rel{max-width:1080px;margin:40px auto 0}footer{border-top:1px solid var(--line);margin-top:50px;padding:30px 0;font:15px/1.6 system-ui,sans-serif;color:var(--dim)}
.cta-box{background:var(--soft);border-radius:16px;padding:22px;display:flex;gap:18px;align-items:center;justify-content:space-between;flex-wrap:wrap;color:var(--ink)}.cta-box p{margin:0;max-width:640px}
.btn{display:inline-block;background:var(--accent);color:#fff;padding:12px 20px;border-radius:999px;text-decoration:none;font-weight:600;white-space:nowrap}
@media (prefers-color-scheme:dark){.btn{color:#0e1412}}.btns{display:flex;gap:10px;flex-wrap:wrap}.btn.alt{background:transparent;color:var(--accent);border:2px solid var(--accent)}.disc{font-size:13px;margin-top:18px}.small{font-size:13px}