:root {
  --ink: #071630;
  --navy: #081c42;
  --blue: #0b4bb3;
  --blue-light: #2c7cf5;
  --red: #ff2838;
  --paper: #f4f7fb;
  --white: #ffffff;
  --muted: #60708b;
  --line: #dce4ef;
  --radius: 22px;
  --shadow: 0 24px 60px rgba(7, 22, 48, 0.12);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }
img { display: block; max-width: 100%; }

.skip-link {
  position: absolute;
  left: 1rem;
  top: -5rem;
  z-index: 10;
  padding: .75rem 1rem;
  border-radius: 10px;
  background: var(--white);
  color: var(--ink);
}
.skip-link:focus { top: 1rem; }

.site-header {
  position: relative;
  z-index: 2;
  border-bottom: 1px solid rgba(255,255,255,.12);
  background: var(--navy);
  color: var(--white);
}

.nav,
.wrap {
  width: min(1120px, calc(100% - 40px));
  margin-inline: auto;
}

.nav {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.brand {
  text-decoration: none;
  font-size: .9rem;
  font-weight: 800;
  letter-spacing: .16em;
  text-transform: uppercase;
}

.brand span { color: #8fb9ff; }

.nav-links { display: flex; align-items: center; gap: 1.5rem; }
.nav-links a { color: #dbe8ff; text-decoration: none; font-weight: 650; }
.nav-links a:hover, .nav-links a:focus-visible { color: var(--white); }

.hero {
  overflow: hidden;
  color: var(--white);
  background:
    radial-gradient(circle at 82% 30%, rgba(28,106,238,.52), transparent 28rem),
    linear-gradient(135deg, #050e22 0%, #0a285c 72%, #0b4bb3 100%);
}

.hero-grid {
  min-height: 620px;
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  align-items: center;
  gap: 4rem;
  padding-block: 78px 88px;
}

.eyebrow {
  margin: 0 0 1rem;
  color: #90bbff;
  font-size: .78rem;
  font-weight: 850;
  letter-spacing: .16em;
  text-transform: uppercase;
}

h1, h2, h3 { margin-top: 0; line-height: 1.08; letter-spacing: -.035em; }
h1 { max-width: 760px; margin-bottom: 1.4rem; font-size: clamp(3rem, 7vw, 5.8rem); }
h2 { margin-bottom: 1rem; font-size: clamp(2rem, 4vw, 3.3rem); }
h3 { margin-bottom: .6rem; font-size: 1.35rem; }

.hero-copy,
.page-intro {
  max-width: 680px;
  color: #d8e5fb;
  font-size: clamp(1.05rem, 2vw, 1.25rem);
}

.actions { display: flex; flex-wrap: wrap; gap: .9rem; margin-top: 2rem; }
.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: .75rem 1.2rem;
  border: 1px solid transparent;
  border-radius: 999px;
  background: var(--white);
  color: var(--navy);
  font-weight: 800;
  text-decoration: none;
}
.button:hover, .button:focus-visible { transform: translateY(-1px); }
.button.secondary { border-color: rgba(255,255,255,.35); background: transparent; color: var(--white); }
.button.dark { background: var(--navy); color: var(--white); }

.app-art {
  position: relative;
  width: min(420px, 80vw);
  margin-inline: auto;
}
.app-art::before {
  content: "";
  position: absolute;
  inset: 12%;
  border-radius: 50%;
  background: var(--red);
  filter: blur(80px);
  opacity: .22;
}
.app-icon { position: relative; border-radius: 24%; box-shadow: 0 36px 80px rgba(0,0,0,.42); }

.section { padding-block: 90px; }
.section.white { background: var(--white); }
.section-heading { max-width: 720px; margin-bottom: 2.5rem; }
.section-heading p { color: var(--muted); font-size: 1.1rem; }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; }
.card {
  padding: 1.6rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: 0 10px 30px rgba(7,22,48,.05);
}
.card p { margin-bottom: 0; color: var(--muted); }
.card-link { display: block; text-decoration: none; transition: transform .18s ease, box-shadow .18s ease; }
.card-link:hover, .card-link:focus-visible { transform: translateY(-3px); box-shadow: var(--shadow); }
.card-kicker { color: var(--blue); font-size: .76rem; font-weight: 850; letter-spacing: .12em; text-transform: uppercase; }

.app-card {
  display: grid;
  grid-template-columns: 110px 1fr auto;
  align-items: center;
  gap: 1.5rem;
  padding: 1.5rem;
  border-radius: 28px;
  background: var(--white);
  box-shadow: var(--shadow);
}
.app-card img { border-radius: 25%; }
.app-card p { margin: 0; color: var(--muted); }
.arrow { color: var(--blue); font-size: 1.7rem; }

.page-hero { padding-block: 72px; background: linear-gradient(135deg, #071630, #0d397f); color: var(--white); }
.page-hero h1 { font-size: clamp(2.7rem, 6vw, 4.8rem); }

.content-layout { display: grid; grid-template-columns: 250px minmax(0, 720px); gap: 4rem; align-items: start; }
.side-nav { position: sticky; top: 2rem; display: grid; gap: .7rem; }
.side-nav a { color: var(--muted); font-weight: 700; text-decoration: none; }
.side-nav a:hover { color: var(--blue); }
.prose h2 { margin-top: 2.8rem; font-size: 1.75rem; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { margin-top: 2rem; }
.prose p, .prose li { color: #40506a; }
.prose a { color: var(--blue); font-weight: 700; }
.notice { padding: 1.2rem 1.4rem; border-left: 4px solid var(--blue-light); border-radius: 0 14px 14px 0; background: #eaf2ff; }
.meta { color: #9db6dc; font-size: .95rem; }

.site-footer { padding-block: 42px; background: #050e22; color: #aebbd0; }
.footer-grid { display: flex; justify-content: space-between; align-items: center; gap: 2rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: 1.2rem; }
.footer-links a { color: #dbe8ff; text-decoration: none; }

:focus-visible { outline: 3px solid #65a2ff; outline-offset: 3px; }

@media (max-width: 800px) {
  .hero-grid { min-height: auto; grid-template-columns: 1fr; gap: 3rem; padding-block: 58px 72px; }
  .hero-copy { max-width: 34rem; }
  .app-art { width: min(320px, 72vw); grid-row: 1; }
  .cards { grid-template-columns: 1fr; }
  .content-layout { grid-template-columns: 1fr; gap: 2rem; }
  .side-nav { position: static; grid-template-columns: repeat(2, max-content); }
  .footer-grid { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 560px) {
  .nav, .wrap { width: min(100% - 28px, 1120px); }
  .nav { min-height: 68px; }
  .nav-links a:not(:last-child) { display: none; }
  .section { padding-block: 64px; }
  .app-card { grid-template-columns: 78px 1fr; }
  .app-card .arrow { display: none; }
  .side-nav { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}