:root{--bg:#0b0c0f;--panel:#14161b;--line:#262a33;--ink:#e8eaf0;--sub:#9aa3b2;--mut:#6b7280;--accent:#7c8cff;--ok:#34d399}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,"Hiragino Kaku Gothic ProN","Noto Sans JP",system-ui,sans-serif;line-height:1.75;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}
.wrap{max-width:820px;margin:0 auto;padding:0 20px}
header.site{border-bottom:1px solid var(--line);position:sticky;top:0;background:rgba(11,12,15,.85);backdrop-filter:blur(10px);z-index:9}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;padding:14px 20px}
header.site a.brand{font-weight:800;color:var(--ink)}
nav.bc{font-size:12.5px;color:var(--mut);padding:18px 0 0}nav.bc a{color:var(--sub)}
h1{font-size:clamp(26px,4.5vw,38px);line-height:1.2;letter-spacing:-.01em;margin:14px 0 8px}
.lede{font-size:17px;color:var(--sub);margin:0 0 8px}
h2{font-size:21px;margin:34px 0 12px;padding-top:8px;border-top:1px solid var(--line)}
h3{font-size:16px;margin:18px 0 6px}
ul,ol{padding-left:1.3em}li{margin:6px 0}
.card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:18px 20px;margin:14px 0}
.steps{counter-reset:s;list-style:none;padding:0}
.steps li{counter-increment:s;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:14px 16px 14px 52px;margin:10px 0;position:relative}
.steps li::before{content:counter(s);position:absolute;left:14px;top:14px;width:26px;height:26px;border-radius:50%;background:var(--accent);color:#0b0c0f;font-weight:800;display:flex;align-items:center;justify-content:center;font-size:13px}
.steps b{display:block;margin-bottom:2px}
table{width:100%;border-collapse:collapse;font-size:14px;margin:10px 0}
th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top}
th{color:var(--mut);font-size:12px;text-transform:uppercase;letter-spacing:.04em;white-space:nowrap}
.faq dt{font-weight:700;margin:16px 0 4px}.faq dd{margin:0 0 4px;color:var(--sub)}
.mu{background:linear-gradient(135deg,rgba(124,140,255,.12),rgba(52,211,153,.08));border:1px solid #2c3350;border-radius:14px;padding:18px 20px;margin:24px 0}
.mu .cta{display:inline-block;margin-top:10px;background:linear-gradient(135deg,#7c8cff,#34d399);color:#06121a;font-weight:800;padding:11px 18px;border-radius:11px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px;margin:18px 0}
.grid a{background:var(--panel);border:1px solid var(--line);border-radius:13px;padding:16px;display:block;color:var(--ink)}
.grid a:hover{border-color:var(--accent);text-decoration:none}
.grid .k{font-size:11px;color:var(--mut);font-family:ui-monospace,monospace}
.grid .t{font-weight:700;margin:6px 0 4px}
.grid .d{font-size:12.5px;color:var(--sub)}
.related{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0}
.related a{font-size:13px;background:var(--panel);border:1px solid var(--line);border-radius:999px;padding:6px 12px}
.cat{display:inline-block;font:700 11px/1 ui-monospace,monospace;color:#aab4ff;background:rgba(124,140,255,.12);padding:5px 9px;border-radius:7px}
img.hero{width:100%;height:auto;aspect-ratio:16/9;object-fit:cover;border:1px solid var(--line);border-radius:16px;margin:16px 0 6px;background:var(--panel)}
.audio{display:flex;flex-direction:column;gap:7px;background:var(--panel);border:1px solid var(--line);border-radius:13px;padding:13px 16px;margin:14px 0}
.audio span{font-size:13px;color:var(--sub)}.audio audio{width:100%}
.muintro{background:linear-gradient(135deg,rgba(124,140,255,.10),rgba(52,211,153,.06));border:1px solid #2c3350;border-radius:13px;padding:14px 16px;margin:18px 0;font-size:13.5px;color:var(--sub)}
.muintro b{color:var(--ink)}
footer.site{border-top:1px solid var(--line);margin-top:50px;padding:30px 0;color:var(--mut);font-size:12.5px}