:root{--bg:#0f172a;--fg:#0f172a;--muted:#475569;--accent:#0369a1;--card:#f8fafc;--line:#e2e8f0}
*{box-sizing:border-box}body{margin:0;font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans","Noto Sans JP","Noto Sans SC",sans-serif;color:var(--fg)}
a{color:var(--accent)}header.top{background:var(--bg);color:#f8fafc}header.top a{color:#e2e8f0;text-decoration:none;margin-right:1.2rem}
.wrap{max-width:1040px;margin:0 auto;padding:0 1.25rem}.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{font-weight:700;font-size:1.15rem;color:#fff!important}.hero{padding:4rem 0 3rem}.hero h1{font-size:2.6rem;line-height:1.15;margin:0 0 1rem;color:#fff}
.hero p{color:#cbd5e1;font-size:1.15rem;max-width:44rem}.btn{display:inline-block;background:#38bdf8;color:#0f172a!important;padding:.7rem 1.1rem;border-radius:.5rem;font-weight:600;margin:.5rem .6rem 0 0}
.btn.alt{background:transparent;border:1px solid #64748b;color:#e2e8f0!important}main{padding:2.5rem 0}section{margin:0 0 3rem}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1rem}.card{background:var(--card);border:1px solid var(--line);border-radius:.75rem;padding:1.1rem}
.card h3{margin:.1rem 0 .4rem}pre{background:#0b1220;color:#e2e8f0;padding:1rem;border-radius:.6rem;overflow:auto;font-size:.85rem}code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
table{border-collapse:collapse;width:100%}th,td{border-bottom:1px solid var(--line);padding:.5rem;text-align:left;vertical-align:top}.price{font-size:1.6rem;font-weight:700}
.muted{color:var(--muted)}footer{border-top:1px solid var(--line);padding:2rem 0;color:var(--muted);font-size:.9rem}footer a{margin-right:1rem}
.draft{background:#fef3c7;border:2px solid #d97706;color:#78350f;padding:1rem;border-radius:.5rem;font-weight:600}.narrow{max-width:760px;margin:3rem auto;padding:0 1.25rem}
pre.key{font-size:1.05rem;background:#f1f5f9;color:#0f172a;border:1px solid var(--line)}nav.toc a{display:inline-block;margin:0 .8rem .3rem 0}