:root{--acc:#931b1b;--acc-soft:#fbe9e9;--acc-deep:#4d0e0e;--bg:#ffffff;--surface:#f6f7f9;--text:#16181d;--muted:#5b616e;--line:#e3e6eb;--r:16px;--rb:999px;--font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-padding-top:128px}body{margin:0;font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.65;font-size:17px}
img{max-width:100%;height:auto;display:block}a{color:var(--acc)}a:hover{text-decoration:none}
.skip{position:absolute;left:-999px}.skip:focus{left:8px;top:8px;background:#fff;padding:8px;z-index:99}
.wrap{max-width:1080px;margin:0 auto;padding:0 18px}.narrow{max-width:760px;margin:0 auto;padding:0 18px}
h1{font-size:clamp(1.75rem,4.6vw,2.55rem);line-height:1.18;margin:.35em 0 .45em;letter-spacing:-.01em}
h2{font-size:clamp(1.3rem,3.2vw,1.65rem);line-height:1.25;margin:1.6em 0 .5em}h3{font-size:1.12rem;margin:1.2em 0 .4em}
p{margin:.75em 0}ul,ol{padding-left:1.3em}li{margin:.35em 0}
.lead{font-size:1.1rem;color:var(--muted)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:10px 22px;border-radius:var(--rb);font-weight:700;text-decoration:none;border:2px solid var(--acc);color:var(--acc);background:#fff;font-size:1rem;line-height:1.1}
.btn-primary{background:var(--acc);color:#fff}.btn-sm{min-height:38px;padding:7px 14px;font-size:.92rem}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin:18px 0}.cta-row .btn{flex:1 1 150px;max-width:260px}
.hdr{position:sticky;top:0;z-index:20;background:#fff;border-bottom:1px solid var(--line)}
.hdr .bar{display:flex;align-items:center;gap:14px;min-height:64px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text);font-weight:800;font-size:clamp(.9rem,3.7vw,1.08rem);margin-right:auto;min-width:0}.brand span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.brand img{width:40px;height:40px;border-radius:10px}
.nav a{text-decoration:none;color:var(--text);font-weight:600;font-size:.96rem}.nav a[aria-current]{color:var(--acc)}
.menu-btn{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border:1px solid var(--line);border-radius:10px;background:#fff;cursor:pointer}
.menu-btn svg{width:22px;height:22px}
.drawer{display:none;border-top:1px solid var(--line);padding-block:8px 14px}.drawer.open{display:block}
.drawer a{display:block;padding:11px 2px;border-bottom:1px solid var(--line);text-decoration:none;color:var(--text);font-weight:600}
.hdr-cta{display:flex;gap:8px}
.hero-img{margin:14px 0 8px;border-radius:calc(var(--r) + 4px);overflow:hidden;border:1px solid var(--line)}
.hero-img img{width:100%}
.crumbs{font-size:.86rem;color:var(--muted);margin:16px 0 0}.crumbs a{color:var(--muted)}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px;margin:18px 0}
.card{display:block;padding:16px 16px 14px;border:1px solid var(--line);border-radius:var(--r);text-decoration:none;color:var(--text);background:#fff}
.card > strong{display:block;color:var(--acc);font-size:1.04rem;margin-bottom:4px}.card span{color:var(--muted);font-size:.95rem}
.card img{border-radius:calc(var(--r) - 2px);margin-bottom:10px}
.tw{overflow-x:auto;margin:16px 0}table{border-collapse:collapse;width:100%;font-size:.97rem}th,td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}th{background:var(--surface)}
.note{background:var(--acc-soft);border-left:4px solid var(--acc);padding:12px 14px;border-radius:6px}
.steps{counter-reset:s;list-style:none;padding:0}.steps li{counter-increment:s;position:relative;padding:12px 14px 12px 56px;border:1px solid var(--line);border-radius:var(--r);margin:10px 0;background:#fff}
.steps li::before{content:counter(s);position:absolute;left:14px;top:12px;width:30px;height:30px;border-radius:50%;background:var(--acc);color:#fff;font-weight:700;display:flex;align-items:center;justify-content:center;font-size:.9rem}
.faq details{border:1px solid var(--line);border-radius:var(--r);padding:12px 16px;margin:10px 0;background:#fff}.faq summary{cursor:pointer;font-weight:700;list-style:none;position:relative;padding-left:26px}.faq summary::-webkit-details-marker{display:none}.faq summary::before{content:"+";position:absolute;left:2px;top:-1px;color:var(--acc);font-weight:800;font-size:1.15rem}.faq details[open] summary::before{content:"3"}
.code-box{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin:16px 0;padding:16px;border:2px dashed var(--acc);border-radius:var(--r);background:var(--acc-soft)}
.code-box .code{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:1.35rem;font-weight:800;letter-spacing:.04em}
.code-box button{min-height:40px;padding:6px 16px;border-radius:var(--rb);border:0;background:var(--acc);color:#fff;font-weight:700;cursor:pointer}
.band{margin:34px 0 10px;padding:22px 20px;border-radius:calc(var(--r) + 6px);background:var(--acc-deep);color:#fff}.band p{margin:.3em 0 .8em}
.band .btn{border-color:#fff;color:#fff;background:transparent}.band .btn-primary{background:#fff;color:var(--acc-deep)}
.related{margin:28px 0;padding:16px 18px;background:var(--surface);border-radius:var(--r)}.related ul{margin:.4em 0}
.toc{background:var(--surface);border-radius:var(--r);padding:14px 18px;margin:18px 0}.toc ol{margin:.3em 0}
.ftr{margin-top:40px;background:#111317;color:#c9ccd3;padding:34px 0 26px;font-size:.94rem}.ftr a{color:#e8eaee;text-decoration:none}
.ftr .cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:22px}.ftr h2{font-size:1rem;color:#fff;margin:0 0 8px}
.ftr ul{list-style:none;padding:0;margin:0}.ftr li{margin:.4em 0}.ftr .fine{border-top:1px solid #2a2d34;margin-top:22px;padding-top:14px;color:#9aa0ab;font-size:.86rem}
main{display:block;padding-bottom:10px}
.btn-primary{background:var(--acc);color:#fff}.hdr-cta .btn{background:#fff;color:var(--acc)}
.tabs{display:flex;gap:6px;overflow-x:auto;padding-block:0 10px;padding-inline-end:36px;scrollbar-width:none;-webkit-mask-image:linear-gradient(90deg,#000 82%,transparent);mask-image:linear-gradient(90deg,#000 82%,transparent)}
@media(max-width:560px){.hdr .bar{flex-wrap:wrap;row-gap:8px;padding-block:10px}.hdr .brand{flex:1 1 100%}.hdr .hdr-cta{flex:1 1 100%}.hdr .hdr-cta .btn{flex:1}}.tabs a{flex:0 0 auto;padding:8px 14px;border-radius:999px;background:var(--surface);text-decoration:none;color:var(--text);font-weight:600;font-size:.93rem}
.tabs a[aria-current]{background:var(--acc);color:#fff}.facts th{width:42%}.help-cards .card > strong::after{content:" \2192"}