*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--brand:#b94a36;--brand-dim:#efe7df;--ink:#222;--mute:#666;--bg:#fdfbf8;--line:#e3dcd2}
html,body{background:var(--bg);color:var(--ink);font-family:"Hiragino Kaku Gothic ProN","Noto Sans JP","Yu Gothic",sans-serif;line-height:1.75;font-size:15px}
a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}
.topnav{position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:space-between;padding:14px 28px;background:rgba(253,251,248,.95);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.topnav .brand img{height:24px;display:block}
.topnav nav{display:flex;gap:22px;font-size:13px;color:var(--mute)}
.topnav nav a{color:var(--mute);font-weight:500}
.topnav nav a:hover{color:var(--brand)}
main.doc{max-width:780px;margin:0 auto;padding:48px 28px 64px}
main.doc h1{font-size:26px;font-weight:800;border-bottom:2px solid var(--brand);padding-bottom:10px;margin-bottom:24px;letter-spacing:-.01em}
main.doc h2{font-size:18px;color:var(--brand);margin:2em 0 .8em;padding-left:12px;border-left:4px solid var(--brand);font-weight:700}
main.doc h3{font-size:15.5px;margin:1.4em 0 .5em;color:#5a3a2a;font-weight:700}
main.doc p,main.doc li{margin:.4em 0;overflow-wrap:anywhere}
main.doc ul,main.doc ol{padding-left:1.5em}
main.doc code{background:var(--brand-dim);padding:2px 6px;border-radius:3px;font-family:"SF Mono","Menlo",monospace;font-size:13px}
main.doc pre{background:var(--brand-dim);padding:14px 16px;border-radius:5px;overflow:auto;white-space:pre-wrap;word-break:break-word;margin:1em 0}
main.doc pre code{background:transparent;padding:0}
main.doc table{border-collapse:collapse;width:100%;margin:1em 0;font-size:14px}
main.doc th,main.doc td{border:1px solid var(--line);padding:8px 12px;text-align:left;vertical-align:top}
main.doc th{background:var(--brand-dim)}
main.doc hr{border:none;border-top:1px solid var(--line);margin:1.8em 0}
main.doc blockquote{border-left:3px solid var(--brand);padding:6px 14px;color:var(--mute);background:#fff8f4;margin:1em 0}
.dl-row{margin:1.4em 0;text-align:center}
.dl-row-top{margin:1.6em 0 2.2em}
.dl-row-bottom{margin:2.6em 0 1em;padding-top:1.4em;border-top:1px solid var(--line)}
.btn-dl{display:inline-flex;align-items:center;gap:8px;background:var(--brand);color:#fff!important;padding:12px 26px;border-radius:5px;font-size:14px;font-weight:600;text-decoration:none!important;box-shadow:0 2px 6px rgba(125,47,31,.18);transition:background .12s,transform .12s,box-shadow .12s}
.btn-dl:hover{background:#9a3d2d;transform:translateY(-1px);box-shadow:0 4px 12px rgba(125,47,31,.25)}
.btn-dl svg{flex-shrink:0}
.foot{max-width:780px;margin:0 auto;padding:28px;border-top:1px solid var(--line);display:flex;align-items:center;gap:14px;color:var(--mute);font-size:12px}
.foot img{height:22px}
.howto-card{margin:1.4em 0;padding:18px 22px 14px;background:#fff;border:1px solid var(--line);border-left:4px solid var(--brand);border-radius:4px}
.howto-card h4{font-size:14.5px;font-weight:700;color:#7d2f1f;margin:0 0 .6em}
.howto-card ol{padding-left:1.5em;margin:.4em 0}
.howto-card ol li{margin:.35em 0}
.howto-card kbd{display:inline-block;font-family:"SF Mono","Menlo",monospace;font-size:11.5px;background:#fff;border:1px solid #c8bfb2;border-bottom-width:2px;border-radius:3px;padding:1px 6px;margin:0 1px;color:#3a2a1f}
.howto-note{margin:.6em 0 .2em;font-size:13px;color:var(--mute);background:#fff8f4;padding:8px 12px;border-radius:3px}
.howto-fig{margin:1em 0 .3em;text-align:center}
.howto-fig img{max-width:100%;border:1px solid var(--line);border-radius:4px;box-shadow:0 2px 8px rgba(0,0,0,.05)}
.howto-fig figcaption{font-size:12px;color:var(--mute);margin-top:6px}