:root{--bg:#F2F3F4;--surface:#FFFFFF;--ink:#1E2124;--muted:#555B61;--line:#C9CDD1;--band:#1E2124;--band-ink:#FFFFFF;--band-muted:#C3C8CD;--link:#1E2124;--mark-bg:#FFE9A8;--mark-ink:#1E2124;--note-bg:#E9EBED}
@media (prefers-color-scheme:dark){:root{--bg:#111315;--surface:#1B1E21;--ink:#F1F2F3;--muted:#A9AFB5;--line:#3A4045;--band:#0B0C0D;--band-ink:#FFFFFF;--band-muted:#C3C8CD;--link:#F1F2F3;--mark-bg:#5A4A12;--mark-ink:#FFFFFF;--note-bg:#262A2E}}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.65 -apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",Roboto,Helvetica,Arial,sans-serif}
a{color:var(--link);text-underline-offset:3px}a:focus-visible,summary:focus-visible{outline:3px solid currentColor;outline-offset:3px;border-radius:3px}
.skip{position:absolute;left:-999px;top:0;background:var(--surface);color:var(--ink);padding:10px 14px;z-index:10}.skip:focus{left:8px;top:8px}
header.band{position:relative;overflow:hidden;background:var(--band);color:var(--band-ink)}
header.band::after{content:"";position:absolute;right:-40px;bottom:-1px;width:340px;height:90px;background:linear-gradient(135deg,transparent 49%,rgba(255,255,255,.07) 50%) 0 0/90px 90px repeat-x;clip-path:polygon(0 100%,18% 30%,30% 70%,52% 0,72% 60%,86% 25%,100% 100%);pointer-events:none}
.wrap{max-width:46rem;margin:0 auto;padding:0 20px}
.brand{display:flex;align-items:center;gap:14px;padding:18px 0 10px}.brand img{height:44px;width:auto;display:block}
nav.main{display:flex;flex-wrap:wrap;gap:4px 18px;padding:4px 0 16px}nav.main a{color:var(--band-ink);padding:10px 2px;min-height:44px;display:inline-flex;align-items:center;text-decoration:none;border-bottom:2px solid transparent}
nav.main a:hover{border-color:var(--band-muted)}nav.main a[aria-current=page]{border-color:var(--band-ink);font-weight:700}
main{padding:28px 0 48px}h1{font-size:2rem;line-height:1.2;letter-spacing:-.02em;margin:.2em 0 .3em}h2{font-size:1.3rem;line-height:1.3;margin:2em 0 .4em;scroll-margin-top:12px}h3{font-size:1.05rem;margin:1.4em 0 .3em}
.meta{color:var(--muted);font-size:.95rem;margin:0 0 1.2em}.lead{font-size:1.1rem}
.card{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:16px 18px;margin:1.2em 0}
.notice{background:var(--note-bg);border-left:5px solid var(--ink);border-radius:6px;padding:12px 16px;margin:1.2em 0}
.review{background:var(--surface);border:1px dashed var(--muted);border-radius:8px;padding:10px 14px;margin:1em 0;color:var(--ink);font-size:.95rem}.review strong{letter-spacing:.04em}
mark.todo{background:var(--mark-bg);color:var(--mark-ink);padding:0 4px;border-radius:3px;font-weight:600}
nav.toc ol{columns:1;padding-left:1.2em;margin:.4em 0}@media(min-width:640px){nav.toc ol{columns:2}}
.tablewrap{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:1em 0;border:1px solid var(--line);border-radius:10px}
table{border-collapse:collapse;width:100%;min-width:34rem;background:var(--surface)}th,td{text-align:left;vertical-align:top;padding:10px 12px;border-bottom:1px solid var(--line);font-size:.95rem}th{background:var(--note-bg)}tr:last-child td{border-bottom:0}
footer{border-top:1px solid var(--line);padding:22px 0 40px;color:var(--muted);font-size:.92rem}footer a{color:var(--muted)}
ul{padding-left:1.2em}li{margin:.25em 0}
@media(prefers-reduced-motion:no-preference){a{transition:border-color .15s}}
@media print{header.band::after,.skip{display:none}body{background:#fff;color:#000}}