/* Minimal, accessible, responsive */
:root{--bg:#0b0c10;--fg:#eaeef2;--muted:#a3b0be;--card:#12151a;--brand:#7cd1f9;--accent:#9ef0a0;}
*{box-sizing:border-box}html,body{margin:0;padding:0;background:var(--bg);color:var(--fg);font:16px/1.6 system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,"Noto Sans JP","Hiragino Kaku Gothic ProN","Meiryo",sans-serif}
a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}
.wrap{max-width:960px;margin:0 auto;padding:16px}
header.wrap{display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;gap:8px;align-items:center}
nav a{margin-left:12px}
.hero h1{font-size:clamp(24px,3vw,34px);margin:0 0 8px}
.hero p{margin:0 0 16px}
.card{background:var(--card);border:1px solid rgba(255,255,255,0.06);border-radius:14px;padding:18px;margin:14px 0}
.grid{display:grid;grid-template-columns:1fr;gap:14px}
@media(min-width:720px){.grid{grid-template-columns:1fr 1fr}}
.btn{display:inline-block;border:1px solid rgba(255,255,255,0.14);padding:10px 14px;border-radius:10px}
.btn.primary{background:var(--accent);color:#08130a;border:none}
.list{padding-left:18px}
.muted{color:var(--muted);font-size:0.9em}
.footer{display:flex;gap:16px;align-items:center;justify-content:space-between;border-top:1px solid rgba(255,255,255,0.06);margin-top:18px;padding-top:12px}
code{background:rgba(255,255,255,0.08);padding:2px 6px;border-radius:6px}