:root {
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #f6f7fb;
  background: #10131c;
  font-synthesis: none;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 88% 4%, rgba(92, 114, 202, .34) 0, transparent 31rem),
    radial-gradient(circle at 4% 34%, rgba(41, 170, 168, .11) 0, transparent 29rem),
    #10131c;
}

a { color: inherit; }

a:focus-visible,
summary:focus-visible {
  outline: 3px solid #91a9ff;
  outline-offset: 4px;
  border-radius: 4px;
}

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

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 92px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: #fff;
  text-decoration: none;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -.02em;
}

.brand img { width: 42px; height: 42px; }

.nav-links,
.footer-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-links a,
.footer-links a {
  color: #c6ccdc;
  text-decoration: none;
  font-size: 14px;
  font-weight: 650;
}

.nav-links a:hover,
.footer-links a:hover,
.text-link:hover { color: #fff; }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, .95fr);
  align-items: center;
  gap: clamp(46px, 7vw, 90px);
  min-height: 650px;
  padding-block: 70px 100px;
}

.eyebrow {
  margin: 0 0 16px;
  color: #91a9ff;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p { text-wrap: pretty; }

h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(44px, 6vw, 76px);
  line-height: 1.02;
  letter-spacing: -.055em;
}

h2 {
  margin: 0;
  font-size: clamp(31px, 4vw, 48px);
  line-height: 1.08;
  letter-spacing: -.04em;
}

h3 {
  margin: 14px 0 10px;
  font-size: 19px;
  line-height: 1.3;
}

.lead {
  max-width: 710px;
  margin: 26px 0 0;
  color: #c9cedb;
  font-size: clamp(18px, 2vw, 21px);
  line-height: 1.65;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 19px;
  border: 1px solid transparent;
  border-radius: 11px;
  text-decoration: none;
  font-size: 14px;
  font-weight: 800;
}

.button.primary {
  color: #fff;
  background: #657fe1;
  box-shadow: 0 16px 35px rgba(62, 83, 168, .28);
}

.button.primary:hover { background: #718bea; }

.button.secondary {
  color: #dce2f4;
  border-color: #373e55;
  background: rgba(24, 29, 43, .72);
}

.button.secondary:hover { border-color: #56617f; background: #1c2232; }

.trust-list {
  display: flex;
  flex-wrap: wrap;
  gap: 9px 18px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  color: #aeb5c7;
  font-size: 13px;
}

.trust-list li::before { content: "•"; margin-right: 8px; color: #71d1c6; }

.product-preview {
  position: relative;
  padding: 18px;
  border: 1px solid #31384e;
  border-radius: 25px;
  background: rgba(22, 27, 40, .82);
  box-shadow: 0 36px 85px rgba(1, 3, 9, .44);
}

.product-preview::before {
  position: absolute;
  inset: -70px 30px 30px -30px;
  z-index: -1;
  border-radius: 50%;
  background: rgba(101, 127, 225, .13);
  filter: blur(35px);
  content: "";
}

.video-frame {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 390px;
  padding: 22px;
  overflow: hidden;
  border-radius: 17px;
  background:
    linear-gradient(180deg, rgba(9, 11, 17, .15), rgba(9, 11, 17, .82)),
    linear-gradient(135deg, #333a51, #171b27 60%, #262e48);
}

.video-topline,
.definition-meta,
.definition-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.video-topline { color: #b7bdcc; font-size: 12px; font-weight: 700; }

.caption-line {
  align-self: center;
  margin-top: auto;
  margin-bottom: 18px;
  padding: 8px 11px;
  border-radius: 6px;
  color: #fff;
  background: rgba(0, 0, 0, .7);
  font-size: 13px;
}

.definition-card {
  padding: 18px;
  border: 1px solid rgba(153, 173, 255, .32);
  border-radius: 14px;
  background: rgba(20, 24, 36, .96);
  box-shadow: 0 18px 35px rgba(0, 0, 0, .3);
}

.definition-heading { color: #fff; font-size: 17px; font-weight: 850; }
.timestamp { color: #91a9ff; font-size: 12px; }
.definition-card p { margin: 10px 0 16px; color: #d5d9e5; line-height: 1.5; }
.definition-meta { color: #8f97aa; font-size: 11px; }

.section { padding-block: 96px; }

.section-heading { max-width: 750px; margin-bottom: 38px; }
.section-heading.narrow { max-width: 660px; }
.section-heading > p:last-child { margin: 18px 0 0; color: #b8becd; font-size: 18px; line-height: 1.65; }

.feature-grid,
.step-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.card {
  min-height: 230px;
  padding: 26px;
  border: 1px solid #2e3549;
  border-radius: 18px;
  background: rgba(25, 30, 44, .82);
}

.card-number { color: #71d1c6; font-size: 12px; font-weight: 850; letter-spacing: .12em; }
.card p,
.split-section p,
.intent-copy p { margin: 0; color: #b9c0d0; line-height: 1.68; }

.intent-section,
.split-section {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: clamp(40px, 8vw, 110px);
  border-top: 1px solid #2b3142;
}

.intent-copy,
.split-section > div:last-child { display: grid; align-content: start; gap: 18px; }
.text-link { width: fit-content; color: #9db2ff; font-weight: 800; text-decoration: none; }

.content-hero {
  max-width: 960px;
  min-height: 560px;
  padding-block: 110px 130px;
}

.content-hero h1 { font-size: clamp(42px, 6vw, 70px); }
.content-hero .button { margin-top: 32px; }

.topic-list { display: flex; flex-wrap: wrap; gap: 9px; }
.topic-list span { padding: 8px 12px; border: 1px solid #343c52; border-radius: 999px; color: #cbd2e3; background: #191e2c; font-size: 13px; }

.faq { max-width: 900px; }
.faq details { border-top: 1px solid #30374b; }
.faq details:last-child { border-bottom: 1px solid #30374b; }
.faq summary { padding: 21px 2px; cursor: pointer; color: #eef1f9; font-weight: 800; }
.faq details p { max-width: 730px; margin: -2px 0 22px; color: #b9c0d0; line-height: 1.65; }
.faq details a { color: #9db2ff; }

.cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  margin-block: 40px 100px;
  padding: clamp(28px, 5vw, 54px);
  border: 1px solid #3c4769;
  border-radius: 22px;
  background: linear-gradient(135deg, rgba(73, 91, 159, .35), rgba(25, 30, 44, .9));
}

.cta h2 { max-width: 730px; font-size: clamp(28px, 4vw, 42px); }

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  padding-block: 34px 52px;
  border-top: 1px solid #2b3142;
  color: #9da5b8;
  font-size: 13px;
}

.site-footer strong { color: #fff; }
.site-footer p { margin: 7px 0 0; }
.age-note { grid-column: 1 / -1; }

@media (max-width: 850px) {
  .hero { grid-template-columns: 1fr; min-height: auto; padding-block: 70px; }
  .product-preview { max-width: 610px; }
  .feature-grid,
  .step-grid { grid-template-columns: 1fr; }
  .card { min-height: 0; }
  .intent-section,
  .split-section { grid-template-columns: 1fr; gap: 28px; }
  .content-hero { min-height: auto; padding-block: 80px 100px; }
}

@media (max-width: 560px) {
  .shell { width: min(100% - 28px, 1120px); }
  .site-header { min-height: 76px; }
  .brand img { width: 36px; height: 36px; }
  .nav-links { gap: 14px; }
  .nav-links a { font-size: 13px; }
  h1 { font-size: 43px; }
  .hero { padding-top: 52px; }
  .video-frame { min-height: 340px; padding: 15px; }
  .product-preview { padding: 10px; border-radius: 19px; }
  .definition-card { padding: 15px; }
  .section { padding-block: 72px; }
  .cta { align-items: stretch; flex-direction: column; margin-bottom: 70px; }
  .footer-links { align-items: flex-start; flex-direction: column; gap: 9px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}