:root{--bg:#fbfbf9;--fg:#1c1d20;--muted:#6a6e76;--card:#fff;--line:#e3e3df;--accent:#0b6bcb;--ok:#14803c;--bad:#b3261e;--code:#f1f1ee}
@media (prefers-color-scheme:dark){:root{--bg:#141517;--fg:#e8e8e6;--muted:#9a9ea6;--card:#1c1e21;--line:#2c2f33;--accent:#6ab0ff;--ok:#4cc27a;--bad:#ff7b72;--code:#23262a}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.55 system-ui,-apple-system,"Segoe UI",sans-serif}
a{color:var(--accent)}
main{max-width:60rem;margin:0 auto;padding:1rem 16px 3rem}
h1{font-size:1.8rem;line-height:1.2}h2{font-size:1.25rem}h3{font-size:1.05rem}
.top{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:.5rem;padding:.6rem 16px;border-bottom:1px solid var(--line);background:var(--card)}
.brand{font-weight:700;color:var(--fg);text-decoration:none}
.top nav{display:flex;gap:1rem;flex-wrap:wrap;align-items:center}
.top nav a{color:var(--fg);text-decoration:none}.top nav a:hover{color:var(--accent)}
.me img{border-radius:50%;vertical-align:middle;margin-right:.3rem}
.menu{display:none;background:none;border:1px solid var(--line);border-radius:6px;color:var(--fg);font-size:1.1rem;padding:.2rem .6rem}
@media (max-width:640px){.menu{display:block}.top nav{display:none;width:100%;flex-direction:column;align-items:flex-start}.top nav.open{display:flex}}
.hero{padding:2rem 0}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(16rem,1fr));gap:1rem}
.grid.two{grid-template-columns:repeat(auto-fit,minmax(15rem,1fr))}
.list{display:grid;gap:.75rem}
.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:1rem;margin:0 0 1rem}
.grid .card{margin:0}
a.card.link{display:block;color:inherit;text-decoration:none}a.card.link:hover{border-color:var(--accent)}
.card h2,.card h3{margin-top:0}
.thumbs img{width:100%;height:9rem;object-fit:contain;background:var(--code);border-radius:6px}
.preview{max-width:100%;max-height:24rem;background:var(--code);border-radius:8px}
.muted{color:var(--muted)}.ok{color:var(--ok)}.bad{color:var(--bad)}.small{font-size:.85rem}.big{font-size:1.4rem;font-weight:600}
.notice{border:1px solid var(--line);background:var(--card);border-radius:8px;padding:.7rem 1rem}
.btn{display:inline-block;background:var(--accent);color:#fff;border:0;border-radius:8px;padding:.55rem 1rem;font:inherit;text-decoration:none;cursor:pointer}
.btn.alt{background:none;color:var(--accent);border:1px solid var(--accent)}.btn.small{padding:.3rem .7rem;font-size:.9rem}
.btn:disabled{opacity:.5;cursor:not-allowed}
.linkbtn{background:none;border:0;color:var(--accent);cursor:pointer;font:inherit;padding:0}
form.inline{display:inline;margin-left:.75rem}
label{display:block;margin:.6rem 0}
input:not([type=checkbox]):not([type=hidden]),textarea,select{width:100%;padding:.5rem;border:1px solid var(--line);border-radius:6px;background:var(--card);color:var(--fg);font:inherit}
.filters{display:flex;flex-wrap:wrap;gap:.5rem}.filters input,.filters select{width:auto;flex:1 1 9rem}
label.check{display:flex;gap:.5rem;align-items:flex-start}
fieldset{border:1px solid var(--line)}legend{font-weight:600;padding:0 .4rem}
code,pre{background:var(--code);border-radius:4px;font-size:.9em}code{padding:.1rem .3rem;word-break:break-all}
pre{padding:.75rem;overflow-x:auto}pre.msg{white-space:pre-wrap;word-break:break-all}
table.rows{width:100%;border-collapse:collapse}.rows td,.rows th{padding:.5rem .4rem;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.prose img{max-width:100%}.prose{overflow-wrap:anywhere}
.post{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:.75rem 1rem;margin:0 0 .75rem}
.post header img{border-radius:50%;vertical-align:middle;margin-right:.4rem}
.post.hidden{opacity:.55}.post footer{font-size:.9rem;margin-top:.4rem}
.flair{background:var(--code);border-radius:999px;padding:.05rem .5rem;font-size:.8rem}
.pager{display:flex;justify-content:space-between;gap:1rem;margin:2rem 0}
.crumb{color:var(--muted);margin:0}
.cert{text-align:center;border:2px solid var(--line);border-radius:14px;padding:2rem 1rem;background:var(--card)}
.lessons li{margin:.3rem 0}
footer{text-align:center;color:var(--muted);padding:1.5rem 16px;font-size:.85rem}