:root {
  color-scheme: dark;
  --ink: #e8f1ff;
  --muted: #9aabc4;
  --paper: #080b14;
  --card: #111827;
  --accent: #4df0d0;
  --accent-dark: #78f7dc;
  --line: #26334a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 88% 3%, rgb(0 220 190 / 13%) 0, transparent 25rem),
    radial-gradient(circle at 8% 42%, rgb(124 75 255 / 12%) 0, transparent 30rem),
    var(--paper);
  color: var(--ink);
  font-family: "Segoe UI", Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.7;
}

.page {
  width: min(100% - 2rem, 900px);
  margin: 0 auto;
  padding: 3.5rem 0;
}

header {
  margin-bottom: 1.5rem;
}

.eyebrow {
  margin: 0 0 0.5rem;
  color: var(--accent-dark);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2 {
  font-family: Georgia, "Times New Roman", serif;
  line-height: 1.2;
}

h1 {
  max-width: 15ch;
  margin: 0;
  font-size: clamp(2.5rem, 7vw, 4.5rem);
  letter-spacing: -0.04em;
  text-shadow: 0 0 32px rgb(77 240 208 / 18%);
}

.intro {
  max-width: 62ch;
  margin: 1rem 0 0;
  color: var(--muted);
  font-size: 1.1rem;
}

main {
  display: grid;
  gap: 1.25rem;
}

section,
.video-card {
  border: 1px solid var(--line);
  border-radius: 1.1rem;
  background: var(--card);
  box-shadow: 0 16px 48px rgb(0 0 0 / 32%);
}

section {
  border-color: #26334a;
  background: linear-gradient(145deg, rgb(20 29 46 / 98%), rgb(14 20 33 / 98%));
  padding: clamp(1.25rem, 4vw, 2rem);
}

h2 {
  margin: 0 0 0.75rem;
  font-size: 1.65rem;
}

p {
  margin: 0;
}

p + p {
  margin-top: 0.9rem;
}

a {
  color: var(--accent-dark);
  font-weight: 700;
  text-underline-offset: 0.18em;
  text-decoration-color: rgb(77 240 208 / 55%);
}

a:hover {
  color: var(--accent);
}

.video-card {
  overflow: hidden;
}

.video-heading {
  padding: 1.35rem 1.5rem 0.6rem;
}

.video-heading h2 {
  margin-bottom: 0;
}

.video-frame {
  aspect-ratio: 16 / 9;
  background: #070b14;
}

.video-frame iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
}

.video-caption {
  padding: 1rem 1.5rem 1.35rem;
  color: var(--muted);
  background: #0d1421;
}

footer {
  padding-top: 1.5rem;
  color: var(--muted);
  font-size: 0.9rem;
  text-align: center;
}

@media (max-width: 600px) {
  .page {
    padding: 2rem 0;
  }

  .video-heading,
  .video-caption {
    padding-right: 1.1rem;
    padding-left: 1.1rem;
  }
}