:root {
  --navy-950: #03101f;
  --navy-900: #06172c;
  --navy-800: #0a2341;
  --navy-700: #10365f;
  --blue: #089cff;
  --cyan: #10dddc;
  --gold: #ffca55;
  --paper: #f5f9fc;
  --white: #ffffff;
  --ink: #07182a;
  --muted: #5a6c7f;
  --line: rgba(13, 55, 90, 0.14);
  --shell: min(1180px, calc(100% - 48px));
  --heading: "Space Grotesk", sans-serif;
  --body: "DM Sans", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--body);
  color: var(--ink);
  background: var(--paper);
  font-size: 1rem;
  line-height: 1.6;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
.shell { width: var(--shell); margin-inline: auto; }
.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;
}
.skip-link {
  position: fixed; top: 12px; left: 12px; z-index: 1000; padding: 10px 16px;
  background: var(--white); color: var(--navy-950); transform: translateY(-160%);
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: fixed; inset: 0 0 auto; z-index: 100; color: var(--white);
  border-bottom: 1px solid transparent; transition: background .25s ease, border-color .25s ease;
}
.site-header.scrolled { background: rgba(3, 16, 31, .91); border-color: rgba(255, 255, 255, .1); backdrop-filter: blur(18px); }
.header-inner { min-height: 80px; display: flex; align-items: center; justify-content: space-between; gap: 32px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font: 700 1.2rem/1 var(--heading); letter-spacing: -.03em; }
.brand img { width: 42px; height: 42px; object-fit: contain; }
.brand > span > span { color: var(--blue); }
.site-nav { display: flex; align-items: center; gap: 30px; font-weight: 600; font-size: .94rem; }
.site-nav > a:not(.nav-cta) { color: rgba(255,255,255,.78); transition: color .2s ease; }
.site-nav > a:not(.nav-cta):hover { color: var(--white); }
.nav-cta { padding: 10px 17px; border: 1px solid rgba(255,255,255,.35); border-radius: 999px; }
.nav-cta:hover { background: var(--white); color: var(--navy-950); }
.menu-button { display: none; background: transparent; border: 0; padding: 10px; color: inherit; }
.menu-button span:not(.sr-only) { display: block; width: 24px; height: 2px; margin: 6px 0; background: currentColor; }

.hero {
  position: relative; isolation: isolate; min-height: 820px; padding-top: 80px; color: var(--white);
  background:
    radial-gradient(circle at 73% 45%, rgba(4, 158, 255, .18), transparent 27%),
    radial-gradient(circle at 85% 75%, rgba(0, 228, 212, .12), transparent 25%),
    linear-gradient(135deg, var(--navy-950), var(--navy-900) 58%, #071d38);
  overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: -2; opacity: .22;
  background-image: linear-gradient(rgba(94, 178, 240, .16) 1px, transparent 1px), linear-gradient(90deg, rgba(94, 178, 240, .16) 1px, transparent 1px);
  background-size: 80px 80px; mask-image: linear-gradient(to bottom, transparent, black 35%, transparent);
}
.hero-orbit {
  position: absolute; z-index: -1; width: 770px; height: 770px; right: -220px; top: 50px;
  border: 1px solid rgba(20, 219, 230, .22); border-radius: 50%;
  box-shadow: 0 0 110px rgba(0, 153, 255, .08) inset;
}
.hero-orbit::before, .hero-orbit::after { content: ""; position: absolute; border-radius: 50%; border: 1px solid rgba(0, 153, 255, .18); }
.hero-orbit::before { inset: 100px; }
.hero-orbit::after { inset: 215px; }
.hero-grid { min-height: 630px; display: grid; grid-template-columns: 1.12fr .88fr; align-items: center; gap: 70px; padding-block: 72px 56px; }
.eyebrow { margin: 0 0 22px; color: var(--blue); font-size: .78rem; font-weight: 700; letter-spacing: .18em; text-transform: uppercase; }
.hero .eyebrow span { color: var(--gold); }
.hero h1, .section-heading h2, .about h2, .closing h2 {
  margin: 0; font: 600 clamp(3.6rem, 7vw, 6.6rem)/.94 var(--heading); letter-spacing: -.065em;
}
.hero h1 em { display: inline-block; color: transparent; font-style: normal; -webkit-text-stroke: 1px rgba(255,255,255,.72); }
.hero-lede { max-width: 650px; margin: 30px 0 0; color: rgba(255,255,255,.71); font-size: clamp(1.05rem, 1.5vw, 1.25rem); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 36px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 18px; min-height: 52px; padding: 0 23px; border-radius: 999px; font-weight: 700; transition: transform .2s ease, background .2s ease, color .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: var(--navy-950); background: linear-gradient(135deg, var(--cyan), var(--blue)); box-shadow: 0 14px 45px rgba(0, 163, 255, .23); }
.button-secondary { color: var(--white); border: 1px solid rgba(255,255,255,.27); }
.button-secondary:hover { background: rgba(255,255,255,.08); }
.hero-mark { position: relative; display: grid; place-items: center; }
.hero-mark img { position: relative; width: min(100%, 470px); filter: drop-shadow(0 32px 70px rgba(0, 124, 255, .27)); animation: hover 6s ease-in-out infinite; }
.hero-mark p { margin: -20px 0 0; font: 600 1.15rem var(--heading); letter-spacing: .28em; text-transform: uppercase; }
.hero-mark p span { color: var(--gold); font: 500 .75rem var(--body); letter-spacing: .12em; }
.mark-halo { position: absolute; width: 430px; aspect-ratio: 1; border-radius: 50%; background: radial-gradient(circle, rgba(9, 166, 255, .2), transparent 68%); filter: blur(6px); }
@keyframes hover { 50% { transform: translateY(-12px) rotate(1deg); } }
.category-rail { display: grid; grid-template-columns: repeat(5, 1fr); border-top: 1px solid rgba(255,255,255,.15); }
.category-rail { scrollbar-width: none; }
.category-rail::-webkit-scrollbar { display: none; }
.category-rail a { display: flex; align-items: center; gap: 12px; padding: 28px 18px; border-right: 1px solid rgba(255,255,255,.12); color: rgba(255,255,255,.65); transition: background .2s ease, color .2s ease; }
.category-rail a:first-child { border-left: 1px solid rgba(255,255,255,.12); }
.category-rail a:hover { background: rgba(255,255,255,.05); color: var(--white); }
.category-rail b { color: var(--gold); font: 600 .72rem var(--heading); letter-spacing: .08em; }
.category-rail span { font-weight: 600; }

.section-pad { padding-block: 130px; }
.explore { background: var(--paper); }
.section-heading { display: grid; grid-template-columns: 1fr .78fr; align-items: end; gap: 60px; margin-bottom: 60px; }
.section-heading h2, .about h2 { color: var(--navy-900); font-size: clamp(3rem, 6vw, 5.7rem); }
.section-heading > p { max-width: 500px; margin: 0 0 5px auto; color: var(--muted); font-size: 1.12rem; }
.topic-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.topic-card { min-height: 350px; display: flex; flex-direction: column; justify-content: space-between; gap: 70px; padding: 34px; background: #fff; transition: transform .25s ease, background .25s ease; }
.topic-card:hover { position: relative; z-index: 2; transform: translateY(-5px); box-shadow: 0 22px 65px rgba(5, 35, 62, .12); }
.topic-card-large { grid-row: span 2; min-height: 701px; background: var(--navy-900); color: var(--white); }
.topic-card-accent { background: #dff9ff; }
.topic-top { display: flex; align-items: center; justify-content: space-between; color: #7690a6; font: 600 .76rem var(--heading); letter-spacing: .1em; }
.topic-top i { width: 38px; height: 38px; display: grid; place-items: center; border: 1px solid currentColor; border-radius: 50%; font-style: normal; font-size: 1rem; }
.topic-card-large .topic-top { color: rgba(255,255,255,.52); }
.card-label { margin: 0 0 12px; color: var(--blue); font-weight: 700; font-size: .8rem; letter-spacing: .16em; text-transform: uppercase; }
.topic-card-large .card-label { color: var(--gold); }
.topic-card h3 { max-width: 520px; margin: 0; font: 600 clamp(1.85rem, 3vw, 3rem)/1.04 var(--heading); letter-spacing: -.045em; }
.topic-card-large h3 { font-size: clamp(2.8rem, 5vw, 4.9rem); }
.topic-card p:last-child { max-width: 480px; margin: 18px 0 0; color: var(--muted); }
.topic-card-large p:last-child { color: rgba(255,255,255,.66); font-size: 1.08rem; }

.about { color: var(--white); background: var(--navy-950); }
.about-grid { display: grid; grid-template-columns: 1.15fr .85fr; align-items: center; gap: 80px; }
.about-art {
  position: relative; overflow: hidden; min-height: 490px; display: grid; place-items: center; border-radius: 2px;
  background:
    radial-gradient(circle at 50% 45%, rgba(8, 156, 255, .24), transparent 42%),
    linear-gradient(145deg, #092849, #041425 68%);
  box-shadow: 0 35px 90px rgba(0,0,0,.35);
}
.about-art::before {
  content: ""; position: absolute; width: 80%; aspect-ratio: 1; border: 1px solid rgba(16, 221, 220, .2); border-radius: 50%;
  box-shadow: 0 0 0 70px rgba(8, 156, 255, .045), 0 0 0 140px rgba(8, 156, 255, .025);
}
.about-art::after { content: ""; position: absolute; inset: 0; box-shadow: inset 0 0 0 1px rgba(255,255,255,.1); pointer-events: none; }
.about-art img.about-mark { position: relative; z-index: 1; width: min(65%, 390px); height: auto; object-fit: contain; filter: drop-shadow(0 28px 60px rgba(0, 134, 255, .28)); }
.about h2 { color: var(--white); font-size: clamp(3rem, 5vw, 5rem); }
.about-copy > p:not(.eyebrow) { color: rgba(255,255,255,.68); font-size: 1.08rem; }
.about-copy h2 + p { margin-top: 30px; }
.text-link { display: inline-flex; gap: 16px; margin-top: 18px; padding-bottom: 5px; border-bottom: 1px solid var(--cyan); font-weight: 700; }
.text-link span { color: var(--cyan); }

.closing { padding-block: 100px; color: var(--navy-950); background: linear-gradient(135deg, var(--gold), #ffe89b 55%, var(--cyan)); }
.closing-inner { display: grid; grid-template-columns: 1fr auto; align-items: end; gap: 30px; }
.closing .eyebrow { grid-column: 1 / -1; margin-bottom: -6px; color: var(--navy-700); }
.closing h2 { font-size: clamp(4rem, 9vw, 8rem); }
.button-light { margin-bottom: 10px; background: var(--navy-950); color: var(--white); }

.site-footer { padding-block: 40px; color: rgba(255,255,255,.57); background: #020b15; }
.footer-inner { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 24px; font-size: .85rem; }
.brand-footer { color: var(--white); }
.brand-footer img { width: 34px; height: 34px; }
.footer-inner p { margin: 0; }
.footer-inner p:last-child { text-align: right; }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

@media (max-width: 920px) {
  :root { --shell: min(100% - 34px, 760px); }
  .menu-button { display: block; }
  .site-nav {
    position: absolute; inset: 80px 0 auto; display: none; flex-direction: column; align-items: stretch; gap: 0;
    padding: 10px 17px 22px; background: rgba(3, 16, 31, .98); border-bottom: 1px solid rgba(255,255,255,.1);
  }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 14px 18px; }
  .nav-cta { margin-top: 8px; text-align: center; }
  .hero { min-height: auto; }
  .hero-grid { min-height: auto; grid-template-columns: 1fr; gap: 30px; padding-top: 100px; }
  .hero-mark { width: min(520px, 80vw); margin: -20px auto 10px; }
  .hero-mark img { width: min(100%, 390px); }
  .category-rail { grid-template-columns: repeat(5, minmax(130px, 1fr)); overflow-x: auto; width: 100%; padding-inline: 17px; }
  .category-rail a { min-width: 130px; }
  .section-heading, .about-grid { grid-template-columns: 1fr; gap: 34px; }
  .section-heading > p { margin-left: 0; }
  .about-art { min-height: 400px; }
  .footer-inner { grid-template-columns: 1fr; text-align: left; }
  .footer-inner p:last-child { text-align: left; }
}

@media (max-width: 620px) {
  :root { --shell: calc(100% - 28px); }
  .header-inner { min-height: 70px; }
  .site-nav { inset-block-start: 70px; }
  .brand img { width: 38px; height: 38px; }
  .hero-grid { padding-top: 80px; }
  .hero h1 { font-size: clamp(3.2rem, 17vw, 4.8rem); }
  .hero-lede { font-size: 1rem; }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .button { width: 100%; }
  .hero-mark { width: min(420px, 88vw); }
  .hero-mark img { width: 300px; }
  .category-rail { grid-template-columns: repeat(5, 120px); }
  .section-pad { padding-block: 88px; }
  .section-heading { margin-bottom: 38px; }
  .section-heading h2, .about h2 { font-size: clamp(2.9rem, 14vw, 4.2rem); }
  .topic-grid { grid-template-columns: 1fr; }
  .topic-card, .topic-card-large { grid-row: auto; min-height: 350px; padding: 27px; }
  .topic-card-large h3 { font-size: 2.8rem; }
  .about-art { min-height: 300px; }
  .about-art img.about-mark { width: min(68%, 280px); }
  .closing { padding-block: 76px; }
  .closing-inner { grid-template-columns: 1fr; }
  .closing h2 { font-size: 4.5rem; }
  .button-light { margin: 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}