:root {
  --ink: #07182f;
  --blue: #0b2b51;
  --mint: #4ee6b1;
  --deep-mint: #0c7059;
  --ice: #eaf7f4;
  --paper: #f7fafc;
  --white: #fff;
  --muted: #66758a;
  --line: #d9e3ea;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font:
    17px/1.65 Inter,
    ui-sans-serif,
    system-ui,
    -apple-system,
    "Segoe UI",
    sans-serif;
}
a {
  color: inherit;
  text-underline-offset: 4px;
}
a:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--mint);
  outline-offset: 4px;
}
h1,
h2,
h3,
p {
  margin-top: 0;
}
h1,
h2 {
  font-family: Georgia, "Times New Roman", serif;
  line-height: 1.03;
  letter-spacing: -0.04em;
}
h1 {
  font-size: clamp(3.4rem, 7.4vw, 8rem);
  font-weight: 500;
  margin: 0.25em 0;
}
h1 em,
h2 em {
  font-style: normal;
  color: var(--mint);
}
h2 {
  font-size: clamp(2.4rem, 5vw, 5rem);
  font-weight: 500;
}
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 4vw;
  background: rgba(247, 250, 252, 0.94);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(7, 24, 47, 0.1);
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  font-weight: 900;
  letter-spacing: 0.06em;
}
.mark {
  display: grid;
  place-items: center;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 0.55rem;
  background: var(--ink);
  color: var(--mint);
  font-size: 0.76rem;
  letter-spacing: -0.08em;
}
.topbar nav {
  display: flex;
  gap: 1.7rem;
}
.topbar nav a {
  text-decoration: none;
  font-size: 0.84rem;
  font-weight: 750;
}
.pill,
.button {
  display: inline-block;
  text-decoration: none;
  font-weight: 850;
}
.pill {
  background: var(--ink);
  color: #fff;
  padding: 0.65rem 1rem;
  border-radius: 999px;
  font-size: 0.82rem;
}
.hero {
  min-height: 88vh;
  padding: 7vw 6vw;
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(310px, 0.75fr);
  gap: 6vw;
  align-items: center;
  background:
    radial-gradient(
      circle at 88% 10%,
      rgba(78, 230, 177, 0.28),
      transparent 29%
    ),
    var(--paper);
}
.eyebrow,
.section-no,
.signal {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-weight: 900;
  color: #12694f;
}
.strap {
  font: 700 1rem Georgia;
  color: var(--muted);
}
.lede {
  font-size: clamp(1.15rem, 2vw, 1.48rem);
  max-width: 52rem;
  color: #43536a;
}
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 2rem;
}
.button {
  padding: 0.9rem 1.25rem;
  border-radius: 999px;
}
.primary {
  background: var(--ink);
  color: #fff;
}
.ghost {
  border: 1px solid var(--ink);
}
.reader-card {
  background: var(--ink);
  color: #fff;
  border-radius: 2rem;
  padding: 2.2rem;
  box-shadow: 0 32px 80px rgba(7, 24, 47, 0.22);
  transform: rotate(1.5deg);
}
.reader-card > p {
  font: clamp(1.7rem, 3vw, 2.8rem) / 1.15 Georgia;
  margin: 1.8rem 0;
}
.signal {
  color: var(--mint);
}
.reader-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: #37506b;
  margin: 1.5rem 0;
}
.reader-list span {
  background: #0b2340;
  padding: 1rem 0.5rem;
  text-align: center;
  font-size: 0.8rem;
  font-weight: 800;
}
.reader-card strong {
  color: var(--mint);
}
.metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  background: var(--ink);
  color: #fff;
}
.metrics article {
  padding: 3.2rem 6vw;
  border-right: 1px solid #36506c;
}
.metrics strong,
.metrics span,
.metrics small {
  display: block;
}
.metrics strong {
  font: 5rem/1 Georgia;
  color: var(--mint);
}
.metrics span {
  font-weight: 850;
  font-size: 1.1rem;
}
.metrics small {
  color: #b8c8d8;
  margin-top: 0.5rem;
}
.section {
  padding: 8rem 6vw;
}
.intro-grid,
.bride,
.faq {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 7vw;
}
.large {
  font: clamp(1.35rem, 2.3vw, 2rem) / 1.45 Georgia;
}
.dark,
.record,
.finale {
  background: var(--ink);
  color: #fff;
}
.light {
  color: var(--mint);
}
.cards {
  display: grid;
  gap: 1rem;
  margin-top: 3rem;
}
.cards.three {
  grid-template-columns: repeat(3, 1fr);
}
.cards article {
  background: #0b2340;
  border-top: 4px solid var(--mint);
  padding: 2rem;
}
.cards b {
  font: 3rem Georgia;
  color: var(--mint);
}
.cards h3 {
  font: 1.55rem Georgia;
}
.cards p {
  color: #d5e0ea;
}
.conclusion,
.finding {
  max-width: 70rem;
  font: 1.35rem Georgia;
  margin: 3rem 0 0;
  padding-left: 1rem;
  border-left: 4px solid var(--mint);
}
.test-head {
  max-width: 60rem;
}
.failure-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 3rem;
}
.failure-grid article {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 1rem;
  padding: 2rem;
}
.failure-grid span {
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  font-weight: 900;
  color: #12694f;
}
.failure-grid h3 {
  font: 2rem Georgia;
  margin: 0.6rem 0;
}
.mint {
  background: var(--mint);
}
.mint .section-no {
  color: var(--ink);
}
.method-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: rgba(7, 24, 47, 0.3);
  margin-top: 3rem;
}
.method-grid article {
  background: #bff5e1;
  padding: 2.2rem;
}
.method-grid h3 {
  font: 1.55rem Georgia;
}
.bride {
  background:
    radial-gradient(
      circle at 0 100%,
      rgba(78, 230, 177, 0.35),
      transparent 35%
    ),
    #fff;
}
.record dl {
  margin: 3rem 0 0;
  border-top: 1px solid #37506b;
}
.record dl > div {
  display: grid;
  grid-template-columns: 0.55fr 1.45fr;
  gap: 2rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid #37506b;
}
.record dt {
  font-weight: 850;
  color: var(--mint);
}
.record dd {
  margin: 0;
  color: #dce5ed;
}
.faq details {
  border-top: 1px solid var(--line);
  padding: 1.2rem 0;
}
.faq summary {
  font-weight: 850;
  cursor: pointer;
}
.finale {
  padding: 9rem 6vw;
  background: linear-gradient(135deg, var(--ink), #0d4768);
}
.finale h2 {
  font-size: clamp(3rem, 7vw, 7rem);
}
.finale > p:not(.section-no) {
  max-width: 52rem;
  font-size: 1.2rem;
  color: #d7e4ed;
}
.bright {
  background: var(--mint);
  color: var(--ink);
  margin-top: 1rem;
}
.lexicon,
.visible-record {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 7vw;
}
.visible-record {
  background: var(--ice);
}
.benefits {
  background: var(--blue);
  color: #fff;
}
.benefits h2 {
  max-width: 70rem;
}
.benefit-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: #37506b;
  margin-top: 3rem;
}
.benefit-grid article {
  background: #0b2340;
  padding: 2rem;
}
.benefit-grid b {
  font: 2.4rem Georgia;
  color: var(--mint);
}
.benefit-grid h3 {
  font: 1.45rem Georgia;
  color: #fff;
}
.benefit-grid p {
  color: #d5e0ea;
}
.bride blockquote {
  margin: 2rem 0;
  padding-left: 1.25rem;
  border-left: 4px solid var(--mint);
  font: 1.45rem/1.45 Georgia;
}
.geo {
  background: linear-gradient(135deg, var(--deep-mint), #09503f);
  color: #fff;
}
.geo-copy {
  max-width: 68rem;
}
.geo-copy p:not(.large) {
  color: #e2f4ee;
}
footer {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 2rem 4vw;
  border-top: 1px solid var(--line);
}
footer p {
  margin: 0;
  color: var(--muted);
  font-size: 0.82rem;
}
footer p:last-child {
  margin-left: auto;
}
@media (max-width: 920px) {
  .topbar nav {
    display: none;
  }
  .hero {
    grid-template-columns: 1fr;
  }
  .reader-card {
    transform: none;
  }
  .metrics article {
    padding: 2.4rem 2rem;
  }
  .cards.three {
    grid-template-columns: 1fr;
  }
  .intro-grid,
  .lexicon,
  .visible-record,
  .bride,
  .faq {
    grid-template-columns: 1fr;
  }
  .benefit-grid {
    grid-template-columns: 1fr 1fr;
  }
  .failure-grid {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 620px) {
  h1 {
    font-size: 3.25rem;
  }
  .hero,
  .section,
  .finale {
    padding: 5rem 1.25rem;
  }
  .metrics {
    grid-template-columns: 1fr;
  }
  .metrics article {
    border-right: 0;
    border-bottom: 1px solid #36506c;
  }
  .method-grid {
    grid-template-columns: 1fr;
  }
  .benefit-grid {
    grid-template-columns: 1fr;
  }
  .reader-list {
    grid-template-columns: 1fr;
  }
  .topbar {
    padding: 0.8rem 1rem;
  }
  .pill {
    font-size: 0.75rem;
  }
  .actions {
    display: grid;
    text-align: center;
  }
  footer {
    align-items: flex-start;
    flex-direction: column;
  }
  footer p:last-child {
    margin-left: 0;
  }
  .record dl > div {
    grid-template-columns: 1fr;
    gap: 0.4rem;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}