:root{
  --bg:#071426;--surface:#0d2038;--surface2:#112943;--ink:#eef7ff;--muted:#a8bfd1;
  --line:#24405a;--teal:#45d9d0;--amber:#f4c95d;--blue:#6ab7ff;--white:#fff;
  --max:1160px;--radius:18px;--shadow:0 18px 55px rgba(0,0,0,.22);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--ink);line-height:1.7}
a{color:var(--teal);text-underline-offset:3px}
a:hover{color:#8ff2ec}
.container{width:min(calc(100% - 36px),var(--max));margin:auto}
.site-header{position:sticky;top:0;z-index:20;background:rgba(7,20,38,.93);backdrop-filter:blur(14px);border-bottom:1px solid rgba(255,255,255,.08)}
.nav{min-height:74px;display:flex;align-items:center;gap:28px}
.brand{display:flex;align-items:center;gap:10px;color:var(--white);text-decoration:none;font-weight:850;letter-spacing:-.02em}
.brand-mark{width:34px;height:34px;display:grid;place-items:center;border-radius:11px;background:linear-gradient(135deg,var(--teal),var(--amber));color:var(--bg);font-weight:950}
.nav-links{display:flex;gap:24px;margin-left:auto;align-items:center}
.nav-links a{color:#d9e8f3;text-decoration:none;font-weight:650;font-size:.95rem}
.nav-links a:hover{color:var(--white)}
.menu-btn{display:none;margin-left:auto;background:transparent;border:1px solid var(--line);color:var(--ink);border-radius:10px;padding:8px 10px}
.hero{padding:74px 0 48px;background:
radial-gradient(circle at 80% 0%,rgba(69,217,208,.16),transparent 34%),
radial-gradient(circle at 10% 20%,rgba(244,201,93,.10),transparent 28%)}
.breadcrumbs{font-size:.88rem;color:var(--muted);margin-bottom:22px}
.breadcrumbs a{color:var(--muted);text-decoration:none}
.eyebrow{text-transform:uppercase;letter-spacing:.15em;font-size:.75rem;font-weight:800;color:var(--amber)}
h1{font-size:clamp(2.4rem,6vw,5rem);line-height:1.02;letter-spacing:-.055em;max-width:930px;margin:.2em 0 .35em}
.hero .lede{font-size:clamp(1.05rem,2vw,1.32rem);color:#c5d7e5;max-width:820px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}
.button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 18px;border-radius:12px;text-decoration:none;font-weight:800}
.button.primary{background:linear-gradient(120deg,var(--teal),#83e6e0);color:#06212b}
.button.secondary{border:1px solid var(--line);background:rgba(255,255,255,.03);color:var(--ink)}
main article{padding:18px 0 72px}
.prose{max-width:840px}
.prose h2{font-size:clamp(1.55rem,3vw,2.25rem);line-height:1.2;letter-spacing:-.025em;margin:2.1em 0 .55em}
.prose h3{font-size:1.2rem;margin-top:1.7em}
.prose p,.prose li{color:#c6d7e5}
.prose strong{color:var(--ink)}
.prose ul,.prose ol{padding-left:1.3rem}
.prose li{margin:.55rem 0}
.note{margin:28px 0;padding:20px 22px;border:1px solid var(--line);border-left:4px solid var(--amber);border-radius:14px;background:var(--surface)}
.note strong{display:block;margin-bottom:4px}
.cta-card{margin:54px 0 38px;padding:28px;border-radius:var(--radius);background:linear-gradient(145deg,#102945,#0d2038);border:1px solid #2d526d;box-shadow:var(--shadow)}
.cta-card h2{margin:.35rem 0 .4rem;font-size:1.6rem}
.cta-card .button{margin:12px 0}
.cta-card small{display:block;color:var(--muted);max-width:760px}
.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:14px;margin:24px 0}
table{width:100%;border-collapse:collapse;min-width:680px;background:var(--surface)}
th,td{padding:14px 16px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
th{color:var(--white);background:#102a47}
td{color:#c9d8e4}
.card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin:28px 0}
.feature-card{display:block;text-decoration:none;padding:22px;border-radius:16px;border:1px solid var(--line);background:var(--surface);transition:.2s transform,.2s border-color}
.feature-card:hover{transform:translateY(-2px);border-color:#4b7692}
.feature-card span{font-size:.8rem;color:var(--amber);font-weight:850}
.feature-card h3{color:var(--white);margin:.45rem 0 .25rem}
.feature-card p{margin:0;color:var(--muted)}
.related{margin-top:44px;padding-top:28px;border-top:1px solid var(--line)}
.related h2,.sources h2{font-size:1.3rem}
.related-grid{display:flex;gap:10px;flex-wrap:wrap}
.related-grid a{padding:9px 12px;background:var(--surface);border:1px solid var(--line);border-radius:999px;text-decoration:none}
.sources{margin-top:42px;font-size:.9rem}
.sources p,.sources li{color:var(--muted)}
.site-footer{border-top:1px solid var(--line);padding:42px 0 52px;background:#06111f}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:26px}
.footer-grid h3{font-size:1rem}
.footer-grid a{display:block;color:var(--muted);text-decoration:none;margin:7px 0}
.disclosure{margin-top:28px;color:#86a0b4;font-size:.82rem}
@media(max-width:760px){
  .nav-links{display:none;position:absolute;top:74px;left:0;right:0;padding:18px;background:#08182b;border-bottom:1px solid var(--line);flex-direction:column;align-items:flex-start}
  .nav-links.open{display:flex}.menu-btn{display:block}.hero{padding-top:52px}
  .card-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}
}


/* Production navigation, persistent offer access, and reading rail */
:focus-visible{outline:3px solid var(--amber);outline-offset:3px}
.header-offer{
  margin-left:4px;min-height:42px;padding:0 14px;border-radius:10px;
  background:linear-gradient(120deg,var(--teal),#83e6e0);color:#06212b!important;
  display:inline-flex;align-items:center;text-decoration:none!important;font-size:.88rem!important;font-weight:850!important;
}
.nav-offer{display:none!important}
.content-layout{display:grid;grid-template-columns:minmax(0,840px) minmax(245px,300px);gap:46px;align-items:start}
.side-rail{position:sticky;top:98px;display:grid;gap:16px}
.side-card{border:1px solid var(--line);background:var(--surface);border-radius:16px;padding:19px}
.side-card h2{font-size:1.08rem;line-height:1.25;margin:.2rem 0 .6rem}
.side-card p{font-size:.9rem;color:var(--muted);line-height:1.55}
.side-card .button{width:100%;min-height:44px;font-size:.9rem;margin:.35rem 0 .45rem}
.side-card small{display:block;color:#91a8ba;line-height:1.45;font-size:.74rem}
.side-links a{display:block;text-decoration:none;color:#c8d9e6;padding:8px 0;border-bottom:1px solid rgba(255,255,255,.07);font-size:.9rem}
.side-links a:last-child{border-bottom:0}
.side-links a:hover{color:var(--teal)}
.offer-strip{
  border:1px solid #2e5873;border-radius:14px;background:linear-gradient(135deg,rgba(69,217,208,.10),rgba(244,201,93,.06));
  padding:18px 20px;margin:32px 0;
}
.offer-strip strong{color:var(--ink)}
.offer-strip p{margin:.35rem 0 .75rem!important}
.mobile-offer{display:none}
.updated{font-size:.82rem;color:var(--muted);margin-top:10px}
.topic-nav{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:22px 0}
.topic-nav a{padding:16px;border:1px solid var(--line);border-radius:14px;background:var(--surface);text-decoration:none}
.topic-nav strong{display:block;color:var(--ink);margin-bottom:3px}
.topic-nav span{display:block;color:var(--muted);font-size:.88rem;line-height:1.45}
.comparison-summary{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:24px 0}
.comparison-summary>div{border:1px solid var(--line);border-radius:14px;padding:18px;background:var(--surface)}
.comparison-summary h3{margin:.1rem 0 .55rem!important}
.checklist{list-style:none!important;padding-left:0!important}
.checklist li{position:relative;padding-left:1.75rem}
.checklist li:before{content:"✓";position:absolute;left:0;color:var(--teal);font-weight:900}
.warning-list{list-style:none!important;padding-left:0!important}
.warning-list li{position:relative;padding-left:1.75rem}
.warning-list li:before{content:"→";position:absolute;left:0;color:var(--amber);font-weight:900}
.faq details{border-top:1px solid var(--line);padding:14px 0}
.faq summary{cursor:pointer;font-weight:750;color:var(--ink)}
.faq details p{margin:.6rem 0 0}
@media(max-width:1020px){
  .nav-links{gap:16px}.nav-links a{font-size:.88rem}.header-offer{display:none}
  .nav-offer{display:inline-flex!important;background:var(--teal);color:#06212b!important;padding:9px 12px!important;border-radius:9px}
  .content-layout{grid-template-columns:1fr}.side-rail{position:static;grid-template-columns:repeat(2,minmax(0,1fr));margin-top:8px}
}
@media(max-width:760px){
  body{padding-bottom:68px}
  .nav-links.open .nav-offer{display:inline-flex!important}
  .side-rail{grid-template-columns:1fr}
  .side-card.offer-side{display:none}
  .mobile-offer{
    display:flex;position:fixed;z-index:60;bottom:0;left:0;right:0;min-height:58px;
    align-items:center;justify-content:center;padding:9px 14px;background:#0a1b2e;border-top:1px solid #315772;
    box-shadow:0 -8px 30px rgba(0,0,0,.22)
  }
  .mobile-offer a{width:min(100%,520px);min-height:43px}
  .topic-nav,.comparison-summary{grid-template-columns:1fr}
}