:root{--bg:#fbfaf7;--text:#1f2328;--muted:#5b6470;--accent:#1f6f5c;--accent-soft:#e3f1ec;--line:#e6e2da;--card:#ffffff}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);font:17px/1.7 Georgia,"Times New Roman",serif}
a{color:var(--accent)}
.wrap{max-width:820px;margin:0 auto;padding:0 20px}
header{border-bottom:1px solid var(--line);background:var(--card)}
header .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;padding:18px 20px}
.logo{font:700 22px/1 system-ui,-apple-system,"Segoe UI",sans-serif;color:var(--text);text-decoration:none;letter-spacing:-.3px}
.logo span{color:var(--accent)}
nav a{font:500 15px system-ui,-apple-system,"Segoe UI",sans-serif;color:var(--muted);text-decoration:none;margin-left:18px}
nav a:hover{color:var(--accent)}
h1,h2,h3{font-family:system-ui,-apple-system,"Segoe UI",sans-serif;line-height:1.25;letter-spacing:-.3px}
h1{font-size:34px;margin:40px 0 10px}
h2{font-size:24px;margin-top:36px}
h3{font-size:19px;margin-top:26px}
.lead{font-size:19px;color:var(--muted)}
.meta{font:14px system-ui,sans-serif;color:var(--muted)}
.hero{padding:30px 0 10px}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px;margin:26px 0 40px}
.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:20px}
.card h3{margin:0 0 8px;font-size:18px}
.card h3 a{color:var(--text);text-decoration:none}
.card h3 a:hover{color:var(--accent)}
.card p{margin:0;font-size:15px;color:var(--muted)}
.tag{display:inline-block;font:600 12px system-ui,sans-serif;text-transform:uppercase;letter-spacing:.6px;color:var(--accent);background:var(--accent-soft);padding:3px 8px;border-radius:4px;margin-bottom:10px}
.note{background:var(--accent-soft);border-left:4px solid var(--accent);padding:14px 18px;border-radius:6px;font-size:15px}
table{width:100%;border-collapse:collapse;font:15px system-ui,sans-serif;margin:18px 0}
th,td{border:1px solid var(--line);padding:10px;text-align:left;vertical-align:top}
th{background:var(--accent-soft)}
article{padding-bottom:40px}
footer{border-top:1px solid var(--line);background:var(--card);margin-top:40px;padding:26px 0;font:14px system-ui,sans-serif;color:var(--muted)}
footer a{color:var(--muted);margin-right:16px}
@media (max-width:600px){h1{font-size:28px}nav a{margin:0 14px 0 0}}
/* v2 */
header{position:sticky;top:0;z-index:10}
.cards .card{display:block;padding:0;overflow:hidden;text-decoration:none;color:inherit;transition:transform .15s,box-shadow .15s}
.cards .card:hover{transform:translateY(-3px);box-shadow:0 10px 24px rgba(0,0,0,.08)}
.cards .card img{display:block;width:100%;height:auto;aspect-ratio:16/9;object-fit:cover}
.card-body{padding:16px 18px 20px}
.card-body h3{margin:0 0 8px;font-size:18px;color:var(--text)}
.hero-img{margin:22px 0 10px}
.hero-img img{width:100%;height:auto;border-radius:14px;display:block}
.btn{display:inline-block;background:var(--accent);color:#fff;text-decoration:none;font:600 15px system-ui,sans-serif;padding:11px 22px;border-radius:8px}
.btn:hover{opacity:.9}
.related{border-top:1px solid var(--line);margin-top:30px}
main .wrap,.wrap{max-width:980px}
article{max-width:760px}

/* v3 author */
.how-made{margin:18px 0}
.author-box{border-top:1px solid var(--line);margin-top:34px;padding-top:16px;font:15px/1.6 system-ui,sans-serif;color:var(--muted)}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
.table-scroll table{min-width:640px}