:root{
  --navy:#07152e;--navy2:#0d2146;--ink:#17243d;--muted:#5e6b82;--paper:#f7f9fc;
  --white:#fff;--teal:#0f9f93;--teal2:#3dd6c6;--gold:#f3b61f;--line:#dce4ef;
  --shadow:0 16px 42px rgba(7,21,46,.10);--radius:22px;--max:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;color:var(--ink);background:var(--white);line-height:1.65}
img{max-width:100%;height:auto}
a{color:var(--teal);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:#08766e}
.container{width:min(var(--max),calc(100% - 36px));margin-inline:auto}
.skip-link{position:absolute;left:-999px;top:10px;background:white;color:var(--navy);padding:10px 14px;z-index:999}
.skip-link:focus{left:10px}
.site-header{position:sticky;top:0;z-index:50;background:rgba(7,21,46,.97);backdrop-filter:blur(12px);border-bottom:1px solid rgba(255,255,255,.1)}
.nav-wrap{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand img{display:block;width:250px}
.nav-links{display:flex;align-items:center;gap:22px}
.nav-links a{color:#eaf1ff;text-decoration:none;font-weight:700;font-size:.95rem}
.nav-links a:hover,.nav-links a[aria-current="page"]{color:var(--teal2)}
.menu-btn{display:none;border:1px solid rgba(255,255,255,.3);background:transparent;color:white;border-radius:10px;padding:9px 12px;font:inherit}
.hero{background:
 radial-gradient(circle at 85% 22%,rgba(61,214,198,.23),transparent 28%),
 linear-gradient(135deg,var(--navy),#102a58);color:white;padding:92px 0 74px}
.eyebrow{display:inline-flex;gap:8px;align-items:center;padding:7px 12px;border-radius:999px;background:rgba(61,214,198,.13);border:1px solid rgba(61,214,198,.35);color:#a8fff5;font-weight:800;font-size:.85rem;letter-spacing:.03em;text-transform:uppercase}
.hero-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:55px;align-items:center}
h1,h2,h3{line-height:1.16;margin-top:0;color:var(--navy)}
.hero h1{color:white;font-size:clamp(2.55rem,5vw,4.9rem);letter-spacing:-.045em;margin:20px 0}
.hero p{font-size:1.16rem;color:#d9e4f8;max-width:700px}
.hero-panel{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.17);border-radius:30px;padding:30px;box-shadow:var(--shadow)}
.hero-panel h2{color:white;font-size:1.35rem}
.hero-panel ul{padding-left:20px;margin-bottom:0;color:#eaf1ff}
.btns{display:flex;flex-wrap:wrap;gap:13px;margin-top:28px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:12px;padding:13px 19px;font-weight:800;text-decoration:none;border:2px solid transparent}
.btn-primary{background:var(--teal2);color:var(--navy)}
.btn-primary:hover{background:#73eee2;color:var(--navy)}
.btn-secondary{border-color:rgba(255,255,255,.4);color:white}
.btn-secondary:hover{border-color:white;color:white}
.section{padding:82px 0}
.section.alt{background:var(--paper)}
.section-head{max-width:760px;margin-bottom:34px}
.section-head h2{font-size:clamp(2rem,3.4vw,3.1rem);letter-spacing:-.035em;margin-bottom:12px}
.section-head p{font-size:1.05rem;color:var(--muted);margin:0}
.subject-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.subject-card{display:flex;flex-direction:column;background:white;border:1px solid var(--line);border-radius:var(--radius);padding:25px;box-shadow:0 8px 24px rgba(7,21,46,.055);transition:.2s transform,.2s box-shadow}
.subject-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.subject-card img{width:82px;height:82px;margin-bottom:17px}
.subject-card h3{font-size:1.3rem;margin-bottom:8px}
.subject-card p{color:var(--muted);margin-top:0;flex:1}
.card-link{font-weight:850;text-decoration:none}
.card-link::after{content:" →"}
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.feature{border-left:4px solid var(--teal);padding:6px 0 6px 18px}
.feature h3{font-size:1.12rem;margin-bottom:5px}
.feature p{color:var(--muted);margin:0}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start}
.content-card{background:white;border:1px solid var(--line);border-radius:var(--radius);padding:30px;box-shadow:0 8px 24px rgba(7,21,46,.055)}
.content-card h2{font-size:1.6rem}
.check-list{list-style:none;padding:0;margin:0}
.check-list li{position:relative;padding-left:29px;margin:10px 0}
.check-list li::before{content:"✓";position:absolute;left:0;color:var(--teal);font-weight:900}
.steps{counter-reset:step;display:grid;gap:15px}
.step{counter-increment:step;display:grid;grid-template-columns:45px 1fr;gap:14px;align-items:start}
.step::before{content:counter(step);display:grid;place-items:center;width:40px;height:40px;border-radius:50%;background:var(--navy);color:white;font-weight:900}
.step h3{margin:3px 0 5px}
.step p{margin:0;color:var(--muted)}
.faq{display:grid;gap:14px}
.faq details{background:white;border:1px solid var(--line);border-radius:15px;padding:17px 19px}
.faq summary{cursor:pointer;font-weight:850;color:var(--navy)}
.faq p{margin-bottom:0;color:var(--muted)}
.cta{background:linear-gradient(135deg,var(--navy),#163b78);color:white;border-radius:30px;padding:42px;display:flex;align-items:center;justify-content:space-between;gap:30px}
.cta h2{color:white;margin-bottom:8px}
.cta p{margin:0;color:#d9e4f8}
.page-hero{background:linear-gradient(135deg,var(--navy),#15376e);color:white;padding:70px 0}
.breadcrumb{font-size:.92rem;color:#c8d5ed;margin-bottom:18px}
.breadcrumb a{color:#a8fff5}
.page-hero h1{font-size:clamp(2.35rem,5vw,4.2rem);color:white;letter-spacing:-.04em;margin-bottom:16px}
.page-hero p{max-width:780px;color:#d9e4f8;font-size:1.12rem}
.topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.topic{padding:18px;border:1px solid var(--line);border-radius:15px;background:white;font-weight:750}
.note{background:#effcf9;border:1px solid #b9ece6;border-left:5px solid var(--teal);padding:18px 20px;border-radius:12px}
.prose{max-width:820px}
.prose h2{margin-top:40px;font-size:1.75rem}
.prose h3{margin-top:28px}
.prose p,.prose li{color:#3f4e67}
.site-footer{background:var(--navy);color:#c8d5ed;padding:55px 0 25px}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:35px}
.footer-grid h2,.footer-grid h3{color:white}
.footer-grid ul{list-style:none;padding:0;margin:0}
.footer-grid li{margin:8px 0}
.footer-grid a{color:#dce8ff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.13);margin-top:35px;padding-top:22px;font-size:.91rem;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
.small{font-size:.92rem;color:var(--muted)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

@media(max-width:1120px){
  .menu-btn{display:block}
  .nav-links{display:none;position:absolute;top:76px;left:0;right:0;background:var(--navy);padding:18px 22px 24px;flex-direction:column;align-items:flex-start;border-top:1px solid rgba(255,255,255,.12)}
  .nav-links.open{display:flex}
}

@media(max-width:900px){
  .hero-grid,.two-col{grid-template-columns:1fr}
  .subject-grid{grid-template-columns:repeat(2,1fr)}
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .topic-grid{grid-template-columns:repeat(2,1fr)}
  .hero-panel{max-width:680px}
}
@media(max-width:720px){
  .menu-btn{display:block}
  .nav-links{display:none;position:absolute;top:76px;left:0;right:0;background:var(--navy);padding:18px 22px 24px;flex-direction:column;align-items:flex-start;border-top:1px solid rgba(255,255,255,.12)}
  .nav-links.open{display:flex}
  .brand img{width:210px}
  .hero{padding:67px 0 55px}
  .subject-grid,.feature-grid,.topic-grid,.footer-grid{grid-template-columns:1fr}
  .section{padding:62px 0}
  .cta{align-items:flex-start;flex-direction:column;padding:30px}
}