* {
  box-sizing: border-box;
}

:root {
  color-scheme: dark;
  --background: #020818;
  --surface: rgba(7, 24, 64, 0.82);
  --border: rgba(111, 174, 255, 0.26);
  --primary: #27d7ff;
  --text: #f7f9ff;
  --muted: #b4c7ea;
  --shadow: 0 1.75rem 5rem rgba(0, 5, 24, 0.5);
}

html {
  background: var(--background);
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 78% 8%, rgba(20, 104, 255, 0.28), transparent 30rem),
    radial-gradient(circle at 10% 34%, rgba(0, 207, 255, 0.12), transparent 26rem),
    linear-gradient(145deg, #020818 0%, #061a49 48%, #02081b 100%);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Helvetica Neue", sans-serif;
  font-size: 1rem;
  line-height: 1.65;
}

main {
  width: min(calc(100% - 3rem), 58rem);
  margin: 3rem auto;
  padding: clamp(2rem, 6vw, 4.5rem);
  border: 0.0625rem solid var(--border);
  border-radius: 2rem;
  background: linear-gradient(155deg, rgba(10, 38, 94, 0.78), var(--surface));
  box-shadow: var(--shadow);
}

h1,
h2 {
  color: var(--text);
  line-height: 1.15;
  letter-spacing: -0.025em;
  text-wrap: pretty;
}

h1 {
  margin: 0 0 1.5rem;
  padding-bottom: 1.25rem;
  border-bottom: 0.0625rem solid var(--border);
  font-size: clamp(2.45rem, 7vw, 4rem);
  font-weight: 760;
}

h2 {
  margin: 3rem 0 0.9rem;
  color: var(--primary);
  font-size: clamp(1.3rem, 3vw, 1.7rem);
  font-weight: 720;
}

p {
  max-width: 48rem;
  margin: 0 0 1rem;
  color: var(--muted);
}

ul {
  margin: 0 0 1.25rem;
  padding-left: 1.35rem;
  color: var(--muted);
}

li {
  margin-bottom: 0.55rem;
  padding-left: 0.25rem;
}

li::marker,
strong {
  color: var(--primary);
}

strong {
  font-weight: 750;
}

code {
  padding: 0.12rem 0.35rem;
  border: 0.0625rem solid var(--border);
  border-radius: 0.35rem;
  background: rgba(2, 8, 24, 0.55);
  color: var(--text);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.9em;
}

a {
  color: var(--primary);
  text-decoration-thickness: 0.1rem;
  text-underline-offset: 0.2rem;
}

a:hover {
  color: #8beaff;
}

a:focus-visible {
  outline: 0.1875rem solid var(--primary);
  outline-offset: 0.25rem;
}

@media (max-width: 40rem) {
  body {
    font-size: 0.95rem;
  }

  main {
    width: min(calc(100% - 1.25rem), 58rem);
    margin: 0.625rem auto;
    padding: 2rem 1.25rem 2.75rem;
    border-radius: 1.35rem;
  }

  h2 {
    margin-top: 2.4rem;
  }
}