:root{--bg:#f5f5f7;--card:#fff;--text:#1d1d1f;--muted:#6e6e73;--accent:#1a6ff1;--line:#e5e5ea;
  --grad:linear-gradient(100deg,#1bc9fb 0%,#1a6ff1 45%,#8b5cf6 75%,#e86a92 100%)}
@media (prefers-color-scheme:dark){:root{--bg:#000;--card:#1c1c1e;--text:#f5f5f7;--muted:#a1a1a6;--accent:#4c9bff;--line:#2c2c2e}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);font:17px/1.65 "Figtree",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--accent)}
.top{position:sticky;top:0;z-index:10;background:color-mix(in srgb,var(--bg) 75%,transparent);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid var(--line)}
.top div{max-width:860px;margin:0 auto;padding:0 20px;height:56px;display:flex;align-items:center;gap:20px}
.top .home{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;color:var(--text);text-decoration:none}
.top .home img{width:30px;height:30px;border-radius:8px}
.top nav{margin-left:auto;display:flex;gap:18px;font-size:14px}
.top nav a{color:var(--muted);text-decoration:none}
.top nav a:hover,.top nav a[aria-current]{color:var(--text)}
main{max-width:860px;margin:0 auto;padding:56px 20px 40px;animation:in .8s cubic-bezier(.2,.7,.1,1)}
@keyframes in{from{opacity:0;transform:translateY(16px)}}
h1{font-family:"Newsreader",Georgia,serif;font-weight:500;font-size:clamp(40px,7vw,64px);line-height:1.04;letter-spacing:-.03em;margin:0 0 10px}
.updated{color:var(--muted);font-size:15px;margin-bottom:30px}
main>nav{margin:-10px 0 28px;font-size:15px}
section{background:var(--card);border:1px solid var(--line);border-radius:22px;padding:24px 26px;margin:14px 0}
h2{font-size:20px;line-height:1.3;margin:0 0 8px}
p{margin:0;color:var(--muted)}
ol,ul{color:var(--muted);padding-left:22px;margin:8px 0 0}
li{margin:4px 0}
.btn{display:block;text-align:center;padding:14px 18px;border-radius:14px;font-weight:600;text-decoration:none;margin-top:12px}
.primary{background:linear-gradient(#1bc9fb,#1a6ff1);color:#fff}
.secondary{border:1px solid var(--line);color:var(--text)}
footer.site{max-width:860px;margin:0 auto;padding:10px 20px 50px;color:var(--muted);font-size:14px;display:flex;flex-wrap:wrap;gap:8px 22px}
footer.site a{color:var(--muted);text-decoration:none}
footer.site a:hover{color:var(--text)}
footer.site span{margin-right:auto}
@media (max-width:560px){.top nav a.opt{display:none}}
@media (prefers-reduced-motion:reduce){main{animation:none}}