:root{font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#263247;background:#fff;line-height:1.75;scroll-behavior:smooth;scroll-padding-top:90px}
*{box-sizing:border-box}body{margin:0;background:#fff}a{color:#2d53bb;text-underline-offset:3px}a:hover{color:#153780}a:focus-visible,summary:focus-visible{outline:3px solid #d6981a;outline-offset:5px}
header{background:#fffffff5;border-bottom:1px solid #e5e8ee;position:sticky;top:0;z-index:3}.top{max-width:1240px;margin:auto;padding:18px 32px;display:flex;gap:24px;align-items:center;flex-wrap:wrap}.brand{font-size:20px;font-weight:800;text-decoration:none;color:#1b2640;display:flex;gap:12px;align-items:center}.brand span{background:#3550d6;color:white;border-radius:10px;width:38px;height:38px;display:grid;place-items:center}.top nav{margin-left:auto;display:flex;gap:24px;font-size:14px}
.layout{max-width:1184px;margin:0 auto;padding:30px 32px 64px}main{min-width:0}
.guide-index{border:0;border-bottom:1px solid #e5e8ee;border-radius:0;margin:0;padding:0 0 18px;background:#fff}.guide-index summary{display:flex;justify-content:space-between;align-items:center;gap:18px;list-style:none;font-size:13px;color:#5e6a7c}.guide-index summary::-webkit-details-marker{display:none}.guide-index summary strong{font-size:14px;font-weight:650;color:#2d53bb}.guide-index summary strong::after{content:' +';margin-left:8px}.guide-index[open] summary strong::after{content:' −'}.guide-index nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px 28px;margin-top:24px;padding-bottom:4px}.guide-index a{font-size:14px;text-decoration:none;color:#40516c;line-height:1.55;padding:6px 0}.guide-index a:hover{text-decoration:underline}
h1,h2,h3{line-height:1.18;letter-spacing:-.035em;color:#15223c}h1{font-size:clamp(38px,5vw,62px);max-width:880px;margin:16px auto 26px}h2{font-size:clamp(28px,3vw,36px);margin:0 0 24px}h3{font-size:22px;margin:34px 0 14px}.eyebrow{font-size:12px;letter-spacing:.12em;font-weight:750;color:#3450cf;text-transform:uppercase;margin-bottom:14px}.lead{font-size:21px;line-height:1.7;max-width:820px;color:#4a5870}
.hero{padding:60px 0 56px;text-align:center}.hero>p{max-width:840px;margin:22px auto}.hero>.eyebrow{margin:0 auto 14px}.hero .actions{justify-content:center;margin:30px 0 44px}.hero figure{margin:0 auto;max-width:1040px}.hero figcaption{max-width:840px;margin:16px auto 0}.hero .callout{text-align:left;max-width:880px;margin:36px auto 0}
.actions{display:flex;flex-wrap:wrap;gap:14px;margin:28px 0}.button{background:#354ed3;color:#fff;text-decoration:none;border-radius:8px;padding:13px 22px;font-weight:650}.button:hover{background:#233dae;color:#fff}.button.secondary{background:#fff;color:#344aca;border:1px solid #dfe3ee}.button.secondary:hover{background:#f3f6fc}
section{padding:64px 0;border-top:1px solid #e4e8ee;scroll-margin-top:18px}section>p,section>h2,section>h3,section>ol,section>ul,section>pre,section>details,section>.table-wrap{max-width:880px;margin-left:auto;margin-right:auto}section>p{margin-top:18px;margin-bottom:18px}section>.eyebrow{margin-top:0;margin-bottom:14px}section>ol,section>ul{padding-left:25px}.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;margin:30px 0}.card{background:#fff;border:1px solid #dfe5ed;padding:26px;border-radius:12px}.card strong{display:block;font-size:38px;color:#3450cf;line-height:1.3}.card p{font-size:15px;line-height:1.7;margin-bottom:0}
figure{margin:32px 0}figure img{max-width:100%;height:auto;border:1px solid #e0e5ed;border-radius:12px;box-shadow:0 12px 36px #15223c09;display:block;background:#fff}figcaption{font-size:13px;line-height:1.7;color:#56647d;margin-top:14px}.narrow{max-width:625px;margin-left:auto;margin-right:auto}
code{font-size:.9em;background:#f0f3f8;padding:2px 5px;border-radius:4px;overflow-wrap:anywhere}pre{background:#16233b;color:#edf2ff;border-radius:10px;padding:22px;overflow:auto;line-height:1.7}pre code{background:none;padding:0;overflow-wrap:normal}table{border-collapse:collapse;width:100%;font-size:14px}th,td{text-align:left;border-bottom:1px solid #e0e5ed;padding:15px 14px;vertical-align:top}th{color:#475670;background:#f5f7fa}.table-wrap{overflow:auto}.callout{border-left:3px solid #d39b1c;padding:20px 24px;background:#fffaf0;border-radius:0 8px 8px 0;margin:28px 0;line-height:1.8}li+li{margin-top:12px}
details{background:#fff;border:1px solid #dce2ea;border-radius:10px;padding:20px 24px;margin:14px 0}summary{cursor:pointer;font-weight:650}details p:last-child{margin-bottom:0}footer{padding:36px 24px;border-top:1px solid #e4e8ee;text-align:center;font-size:14px;color:#58667a}.skip{position:absolute;top:-100px}.skip:focus{top:0;z-index:10;background:white;padding:12px}
@media(max-width:760px){
  :root{scroll-padding-top:116px}.layout{padding:22px 20px 40px}.top{padding:14px 20px;gap:12px}.top nav{gap:18px;font-size:13px}.brand{font-size:18px}.brand span{width:34px;height:34px}
  .guide-index nav{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 20px}.guide-index summary{align-items:flex-start;font-size:12px}.guide-index summary strong{font-size:13px}
  .hero{padding:40px 0;text-align:left}.hero h1{font-size:clamp(36px,7.5vw,52px);margin:16px 0 24px}.hero .actions{justify-content:flex-start;margin-bottom:30px}.hero>p{margin:20px 0}.hero .lead{font-size:19px}.hero figcaption{text-align:left}
  section{padding:42px 0}h2{font-size:28px}h3{font-size:21px}.cards{grid-template-columns:1fr;gap:16px}.card{display:flex;gap:24px;align-items:center;padding:22px}.card p{margin:0}.card strong{min-width:48px}.callout{padding:18px 20px}details{padding:18px 20px}
}
@media(max-width:420px){.top nav{margin-left:0;width:100%;justify-content:space-between}.guide-index summary{flex-wrap:wrap;gap:4px}.guide-index nav{grid-template-columns:1fr}.actions .button{flex:1 1 auto;text-align:center}pre{padding:18px;font-size:13px}}
@media(prefers-reduced-motion:reduce){:root{scroll-behavior:auto}}