:root{--maxw:1100px;--pad:1rem;--fg:#111;--muted:#666;--accent:#1b5e20;}
*{box-sizing:border-box}
html,body{margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Hiragino Kaku Gothic ProN","Noto Sans JP","Yu Gothic",Meiryo,sans-serif;color:var(--fg);line-height:1.65}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
header{border-bottom:1px solid #e6e6e6;background:#fff;position:sticky;top:0;z-index:20}
.nav{max-width:var(--maxw);margin:0 auto;display:flex;gap:.75rem;align-items:center;flex-wrap:wrap;padding:.75rem var(--pad)}
.nav a{padding:.25rem .5rem;border-radius:.5rem}
.nav a.active{background:#e8f5e9}
main{max-width:var(--maxw);margin:0 auto;padding:1.25rem var(--pad) 3rem}
h1{font-size:clamp(1.5rem,2.2vw,2.1rem);margin:.5rem 0 1rem 0}
h2{font-size:1.25rem;margin:2rem 0 .5rem}
h3{font-size:1.05rem;margin:1.25rem 0 .5rem;color:#222}
.lead{color:var(--muted)}
.toc{border:1px solid #e6e6e6;border-radius:.75rem;padding:1rem;background:#fafafa}
.toc a{display:block;padding:.25rem 0}
.section{margin-top:1.25rem}
kbd{border:1px solid #ccc;border-bottom-width:2px;border-radius:.35rem;padding:.15rem .35rem;font-family:ui-monospace,Menlo,Consolas,monospace;background:#fff}
.grid{display:grid;grid-template-columns:repeat(12,1fr);gap:1rem}
.card{grid-column:span 12;border:1px solid #e6e6e6;border-radius:1rem;padding:1rem;background:#fff}
@media(min-width:860px){.card.half{grid-column:span 6}}
.figure{display:flex;gap:1rem;align-items:center;flex-wrap:wrap}
.figure svg{max-width:260px;height:auto;border:1px solid #eee;border-radius:.75rem;background:#fff}
.callout{border-left:4px solid var(--accent);padding:.5rem 1rem;background:#f7fff7;border-radius:.5rem}
.table{width:100%;border-collapse:collapse;margin-top:.5rem}
.table th,.table td{border:1px solid #e6e6e6;padding:.5rem;text-align:left;vertical-align:top}
.table thead th{background:#f9f9f9}
footer{border-top:1px solid #e6e6e6;padding:1.25rem var(--pad);color:var(--muted)}
.badge{display:inline-block;font-size:.8rem;border:1px solid #e6e6e6;border-radius:999px;padding:.15rem .5rem;background:#fff}
.shortcut{display:flex;gap:.5rem;flex-wrap:wrap;align-items:center}
.copybtn{border:1px solid #ddd;border-radius:.4rem;padding:.25rem .5rem;background:#fff;cursor:pointer}
.copybtn:active{transform:translateY(1px)}
.small{font-size:.9rem;color:var(--muted)}