*{box-sizing:border-box}
:root{color-scheme:dark}
body{margin:0;background:#071018;color:#dbe7f3;font:1rem/1.9 "Segoe UI",Tahoma,Arial,sans-serif}
a{color:#80dcff;text-underline-offset:4px}
a:hover{color:#b8ecff}
a:focus-visible{outline:3px solid #80dcff;outline-offset:4px;border-radius:4px}
.site-header,.seo-main,.site-footer{width:min(980px,calc(100% - 32px));margin-inline:auto}
.site-header{display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;padding:20px 0;border-bottom:1px solid #29415f}
.brand{font-weight:800;text-decoration:none;color:#eef7ff}
.site-nav{display:flex;gap:14px;flex-wrap:wrap;font-size:.92rem}
.seo-main{padding:34px 0 54px}
.breadcrumb{font-size:.86rem;color:#94a9bd;margin-bottom:18px}
.hero{padding:28px;border:1px solid #29415f;border-radius:18px;background:linear-gradient(180deg,rgba(17,41,60,.72),rgba(8,22,34,.5));box-shadow:0 20px 60px rgba(0,0,0,.18)}
.eyebrow{margin:0 0 8px;color:#80dcff;font-size:.82rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase}
h1,h2,h3{color:#eef7ff;line-height:1.45}
h1{font-size:clamp(2rem,5vw,3.35rem);margin:.2rem 0 .8rem}
h2{font-size:clamp(1.35rem,3vw,1.8rem);margin:0 0 .65rem}
h3{font-size:1.08rem;margin:.2rem 0 .45rem}
p{margin:.45rem 0 1rem}
.lead{font-size:1.08rem;color:#c8d7e4;max-width:800px}
.cta-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 17px;border-radius:10px;border:1px solid #3a5d78;text-decoration:none;font-weight:800;background:#10334b;color:#effaff}
.btn.secondary{background:transparent;color:#9fe7ff}
.content-grid{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:28px;margin-top:30px}
.article section{padding:22px 0;border-bottom:1px solid #203548}
.article ul,.article ol{padding-inline-start:24px}
.article li{margin:.45rem 0}
.callout{padding:16px 18px;border:1px solid #315873;border-radius:12px;background:#0b2030;color:#d8ebf7}
.sidebar{align-self:start;position:sticky;top:18px;padding:18px;border:1px solid #29415f;border-radius:14px;background:#091722}
.sidebar strong{display:block;color:#eef7ff;margin-bottom:8px}
.sidebar a{display:block;padding:5px 0;text-decoration:none}
.related{margin-top:34px;padding:22px;border:1px solid #29415f;border-radius:14px;background:#091722}
.related-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:12px}
.related a{display:block;padding:14px;border:1px solid #263f55;border-radius:10px;text-decoration:none;background:#0c1c29}
.site-footer{padding:24px 0 40px;border-top:1px solid #29415f;color:#9db0c1;font-size:.9rem}
.site-footer nav{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:8px}
.note{font-size:.9rem;color:#9db0c1}
@media(max-width:780px){.content-grid{grid-template-columns:1fr}.sidebar{position:static}.related-grid{grid-template-columns:1fr}.hero{padding:22px}.site-header{align-items:flex-start}}