:root{--bg:#fbfbfd;--ink:#16192b;--muted:#5b6078;--brand:#3b5bdb;--brand-d:#2b44a8;--card:#fff;--line:#e4e7f0;--accent:#facc15}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;font:17px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg)}
a{color:var(--brand)}a:hover{color:var(--brand-d)}
.wrap{max-width:1040px;margin:0 auto;padding:0 20px}.narrow{max-width:740px;margin:0 auto;padding:0 20px}
header.site{background:#fff;border-bottom:1px solid var(--line)}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-top:14px;padding-bottom:14px;flex-wrap:wrap}
.logo{font-weight:800;font-size:1.2rem;color:var(--ink);text-decoration:none;letter-spacing:-.01em}.logo span{color:var(--brand)}
nav a{margin-left:18px;color:var(--ink);text-decoration:none;font-weight:600;font-size:.95rem}nav a:hover{color:var(--brand)}
.hero{padding:64px 0 40px;background:linear-gradient(180deg,#eef1ff,#fbfbfd)}
.hero h1{font-size:clamp(2rem,5vw,3.1rem);line-height:1.15;margin:0 0 16px;letter-spacing:-.02em}
.hero p.lead{font-size:1.2rem;color:var(--muted);max-width:640px;margin:0 0 24px}
.btn{display:inline-block;background:var(--brand);color:#fff;padding:12px 22px;border-radius:10px;font-weight:700;text-decoration:none;border:0}
.btn:hover{background:var(--brand-d);color:#fff}.btn.alt{background:#fff;color:var(--brand);border:2px solid var(--brand)}
.btn.alt:hover{background:#eef1ff;color:var(--brand-d)}.btns{display:flex;gap:12px;flex-wrap:wrap}
section{padding:36px 0}h2{font-size:1.7rem;letter-spacing:-.01em;margin:0 0 18px}h3{margin:28px 0 8px}
.grid{display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px;display:flex;flex-direction:column}
.card img{width:100%;height:auto;border-radius:10px;border:1px solid var(--line)}
.card h3{margin:14px 0 6px;font-size:1.15rem}.card p{margin:0 0 14px;color:var(--muted);font-size:.97rem}
.card .foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:10px}
.price{font-weight:800;font-size:1.2rem}
.post-list a{display:block;padding:14px 0;border-bottom:1px solid var(--line);text-decoration:none;color:var(--ink)}
.post-list a strong{display:block;color:var(--brand)}.post-list a span{color:var(--muted);font-size:.95rem}
article{padding:40px 0}article h1{font-size:clamp(1.8rem,4vw,2.5rem);line-height:1.2;letter-spacing:-.02em;margin:0 0 8px}
.meta{color:var(--muted);font-size:.92rem;margin-bottom:24px}
article pre{background:#10132a;color:#e8ebff;padding:16px;border-radius:10px;overflow-x:auto;font-size:.88rem;line-height:1.5;white-space:pre-wrap}
article code{background:#eef0f8;padding:1px 5px;border-radius:5px;font-size:.92em}article pre code{background:none;padding:0}
article table{border-collapse:collapse;width:100%;font-size:.95rem;margin:16px 0;display:block;overflow-x:auto}
article th,article td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}article th{background:#f0f2fa}
article blockquote{border-left:4px solid var(--accent);margin:18px 0;padding:4px 16px;background:#fffbe6;color:#4a4420}
.cta{background:#eef1ff;border:1px solid #cdd5ff;border-radius:14px;padding:22px;margin:36px 0}
.cta h3{margin:0 0 6px}.cta p{margin:0 0 14px}
ul.check{padding-left:0;list-style:none}ul.check li{padding-left:28px;position:relative;margin:10px 0}
ul.check li:before{content:"\2713";position:absolute;left:0;color:var(--brand);font-weight:800}
.crumbs{font-size:.9rem;color:var(--muted);padding-top:20px}.crumbs a{color:var(--muted)}
.promptbox{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 18px;margin:16px 0}
.promptbox h3{margin:0 0 6px;font-size:1.05rem}.promptbox pre{margin:8px 0 0}
footer.site{background:#10132a;color:#c9cee6;padding:36px 0;margin-top:40px;font-size:.93rem}
footer.site a{color:#fff}footer.site .cols{display:flex;gap:40px;flex-wrap:wrap;justify-content:space-between}
.small{font-size:.85rem;color:var(--muted)}
@media(max-width:560px){nav a{margin-left:12px}}