:root {
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #eef6ff;
  background: #020610;
  font-synthesis: none;
}

* { box-sizing: border-box; }

html { min-width: 320px; background: #020610; }

body {
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 84% 14%, rgba(23, 118, 173, 0.15), transparent 28rem),
    radial-gradient(circle at 10% 72%, rgba(210, 122, 45, 0.07), transparent 26rem),
    #020610;
}

body::before {
  position: fixed;
  z-index: -2;
  inset: 0;
  content: "";
  background:
    radial-gradient(ellipse at 68% 18%, transparent 0 8rem, rgba(91, 211, 255, 0.1) 8.15rem 8.25rem, transparent 8.4rem),
    radial-gradient(circle at 68% 18%, rgba(21, 124, 185, 0.18), transparent 9rem),
    linear-gradient(152deg, transparent 45%, rgba(82, 126, 172, 0.04) 45.3%, transparent 45.8%);
}

.stars {
  position: fixed;
  z-index: -1;
  inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(circle at 14% 19%, rgba(255, 255, 255, 0.78) 0 1px, transparent 1.4px),
    radial-gradient(circle at 68% 31%, rgba(120, 214, 255, 0.7) 0 1px, transparent 1.5px),
    radial-gradient(circle at 84% 78%, rgba(255, 255, 255, 0.54) 0 1px, transparent 1.4px);
  background-size: 19rem 17rem, 27rem 23rem, 31rem 29rem;
  opacity: 0.44;
}

a { color: inherit; }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(100% - 4rem, 96rem);
  min-height: 7.8rem;
  margin: 0 auto;
  border-bottom: 1px solid rgba(159, 196, 219, 0.18);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 1.1rem;
  text-decoration: none;
  letter-spacing: 0.24em;
  font-size: 1rem;
}

.brand img {
  width: 3rem;
  height: auto;
  filter: drop-shadow(0 0 11px rgba(66, 207, 255, 0.38));
}

nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  color: #d1d8e2;
  font-size: 0.72rem;
  letter-spacing: 0.22em;
}

nav a, .source-links a, footer a {
  text-underline-offset: 0.3em;
  text-decoration-thickness: 1px;
  text-decoration-color: rgba(96, 223, 255, 0.5);
}

nav span { width: 1px; height: 1.3rem; background: rgba(222, 237, 248, 0.52); }

main, footer { width: min(100% - 4rem, 82rem); margin-inline: auto; }

main { padding: clamp(5rem, 10vw, 10rem) 0 6rem; }

.eyebrow, .section-number, .accuracy-note > p:first-child, footer {
  color: #62ddff;
  font-size: 0.69rem;
  font-weight: 600;
  letter-spacing: 0.25em;
}

h1 {
  max-width: 14ch;
  margin: 1.3rem 0 2rem;
  font-size: clamp(3.6rem, 8.4vw, 8.5rem);
  font-weight: 250;
  letter-spacing: -0.055em;
  line-height: 0.91;
}

h1 em { color: #62d8fb; font-style: normal; font-weight: 230; }

.lede {
  max-width: 44rem;
  margin: 0 0 clamp(7rem, 13vw, 12rem);
  color: #b8c4d1;
  font-size: clamp(1.15rem, 2vw, 1.55rem);
  font-weight: 300;
  line-height: 1.65;
}

section {
  display: grid;
  grid-template-columns: 5rem minmax(0, 45rem);
  gap: 2.5rem;
  max-width: 57rem;
  padding: 3.6rem 0;
  border-top: 1px solid rgba(159, 196, 219, 0.18);
}

section:nth-of-type(even) { margin-left: min(12vw, 10rem); }

h2 {
  margin: 0 0 1.3rem;
  font-size: clamp(1.85rem, 3vw, 2.9rem);
  font-weight: 320;
  letter-spacing: -0.025em;
}

section p, .accuracy-note p { color: #b8c4d1; font-size: 1.02rem; line-height: 1.75; }

strong { color: #eef6ff; font-weight: 560; }

.source-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1.5rem;
  margin-top: 1.8rem;
  color: #75ddfb;
  font-size: 0.82rem;
  letter-spacing: 0.07em;
}

.accuracy-note {
  max-width: 64rem;
  margin: 8rem 0 1rem auto;
  padding: clamp(2.5rem, 5vw, 5rem);
  border: 1px solid rgba(96, 221, 255, 0.27);
  background: linear-gradient(135deg, rgba(18, 60, 89, 0.36), rgba(5, 13, 23, 0.58));
  box-shadow: 0 0 4rem rgba(19, 126, 183, 0.09);
  backdrop-filter: blur(18px);
}

.accuracy-note h2 { max-width: 16ch; }
.accuracy-note p:last-child { max-width: 42rem; }

footer {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  padding: 2.4rem 0 3.5rem;
  border-top: 1px solid rgba(159, 196, 219, 0.18);
  color: #9aabba;
}

footer a { color: #6cddff; }
a:focus-visible { outline: 1px solid #62ddff; outline-offset: 0.4rem; }

@media (max-width: 700px) {
  .site-header, main, footer { width: min(100% - 2rem, 82rem); }
  .site-header { min-height: 6.3rem; }
  .brand { gap: 0.7rem; font-size: 0.7rem; }
  .brand img { width: 2.2rem; }
  nav a:first-child, nav span { display: none; }
  nav { font-size: 0.62rem; }
  main { padding-top: 4rem; }
  h1 { font-size: clamp(3.25rem, 16vw, 5.5rem); }
  section, section:nth-of-type(even) { grid-template-columns: 1fr; gap: 1rem; margin-left: 0; padding: 2.8rem 0; }
  .lede { margin-bottom: 6rem; }
  .accuracy-note { margin-top: 5rem; padding: 2rem; }
  footer { flex-direction: column; }
}

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