:root{--ink:#10213f;--muted:#5d6b84;--line:#dde4ef;--bg:#f5f8fc;--card:#fff;--navy:#14213d;--blue:#1f5fd1;--blue-soft:#eaf1fd;--amber:#8a5a00;--amber-soft:#fff4d6;color-scheme:light dark;font-family:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;color:var(--ink);background:var(--bg)}
@media (prefers-color-scheme:dark){:root{--ink:#e6edf7;--muted:#9fb0c8;--line:#2a3d5c;--bg:#0b1628;--card:#13213a;--navy:#cfe0ff;--blue:#7fb0ff;--blue-soft:#15284a;--amber:#ffb703;--amber-soft:#2e2510}}
*{box-sizing:border-box}
body{margin:0;line-height:1.65;background:var(--bg)}
a{color:var(--blue)}a:focus-visible{outline:3px solid var(--blue);outline-offset:2px;border-radius:3px}
.wrap{width:min(920px,calc(100% - 2rem));margin:0 auto}
.skip{position:absolute;left:-9999px;top:0;padding:8px 12px;background:var(--card);z-index:10}.skip:focus{left:1rem}
.top{background:var(--card);border-bottom:1px solid var(--line)}
.top-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px 0 8px}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--navy);font-weight:900;font-size:1.3rem;letter-spacing:-.03em;line-height:1.1}
.brand img{display:block;width:40px;height:40px;border-radius:10px}.brand span span{color:var(--amber)}.brand small{display:block;color:var(--muted);font-size:.7rem;font-weight:600;letter-spacing:0}
.top-links{display:flex;gap:14px;align-items:center}
.back,.lang{font-size:.88rem;font-weight:700;color:var(--muted)}
.tabs{display:flex;gap:4px;overflow-x:auto;padding:4px 0 0;scrollbar-width:thin}
.tabs a{flex:none;padding:10px 12px;border-bottom:3px solid transparent;color:var(--ink);text-decoration:none;font-size:.9rem;font-weight:700}
.tabs a:hover{color:var(--blue)}.tabs a[aria-current="page"]{border-color:var(--blue);color:var(--blue)}
.doc{padding:34px 0 20px}
h1{margin:0 0 6px;font-size:clamp(1.9rem,4.5vw,2.6rem);line-height:1.12;letter-spacing:-.03em;color:var(--navy)}
h2{margin:2.1rem 0 .5rem;font-size:1.3rem;line-height:1.3;color:var(--navy);scroll-margin-top:1rem}
h3{margin:1.4rem 0 .3rem;font-size:1.05rem}
p,li{max-width:72ch}ul,ol{padding-left:1.3rem}li{margin:.3rem 0}
.updated{margin:0 0 1.4rem;color:var(--muted);font-size:.9rem}
.lead{font-size:1.08rem}
code{font-size:.88em;overflow-wrap:anywhere}
.toc{margin:1.2rem 0 1.6rem;padding:14px 20px;border:1px solid var(--line);border-radius:14px;background:var(--card)}
.toc ol{margin:0;columns:2;column-gap:2rem}.toc li{break-inside:avoid;margin:.2rem 0}
.callout{padding:16px 20px;border-radius:14px;background:var(--amber-soft);border:1px solid var(--line)}.callout p{margin:0}
.operator{font-style:normal;padding:16px 20px;border-left:4px solid var(--amber);background:var(--card);border-radius:0 12px 12px 0;line-height:1.7}
.cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:1.6rem}
.card{display:block;padding:20px 22px;border:1px solid var(--line);border-radius:16px;background:var(--card);color:var(--ink);text-decoration:none}
.card h2{margin:0 0 .3rem;font-size:1.12rem;color:var(--blue)}.card p{margin:0;color:var(--muted)}.card:hover h2{text-decoration:underline}
.perm{margin:1rem 0;padding:16px 20px;border:1px solid var(--line);border-radius:14px;background:var(--card)}
.perm h2{margin:0;font-size:1rem}.perm-kind{margin:.2rem 0 .4rem;color:var(--amber);font-size:.82rem;font-weight:800;text-transform:uppercase;letter-spacing:.06em}.perm p:last-child{margin-bottom:0}
.steps li{margin:.5rem 0}
.table-wrap{overflow-x:auto;margin:1rem 0;border:1px solid var(--line);border-radius:12px}
table{width:100%;border-collapse:collapse;font-size:.92rem;background:var(--card)}
caption{text-align:left;padding:10px 14px;font-weight:700}
th,td{padding:10px 14px;border-top:1px solid var(--line);text-align:left;vertical-align:top}th{font-size:.82rem;text-transform:uppercase;letter-spacing:.04em;color:var(--muted)}
.foot{padding:20px 0 40px;border-top:1px solid var(--line);color:var(--muted);font-size:.85rem}.foot p{margin:.3rem 0;max-width:none}.foot a{color:var(--muted)}
@media(max-width:640px){.toc ol{columns:1}.cards{grid-template-columns:1fr}.back{display:none}.doc{padding-top:24px}}