:root {
  color-scheme: dark;
  --canvas-top: #05070c;
  --canvas-mid: #08101e;
  --canvas-bottom: #0c1321;
  --surface: rgba(24, 29, 39, 0.94);
  --surface-raised: rgba(31, 38, 51, 0.96);
  --stroke: rgba(255, 255, 255, 0.11);
  --divider: rgba(255, 255, 255, 0.075);
  --text: #f7f9fc;
  --muted: #a7b0c0;
  --blue: #4e8fff;
  --green: #32d583;
  --purple: #a96cf2;
}

:root[data-theme="dark"] {
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--canvas-top);
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", sans-serif;
  background:
    radial-gradient(circle at 92% -8%, rgba(78, 143, 255, 0.15), transparent 34rem),
    radial-gradient(circle at -15% 22%, rgba(169, 108, 242, 0.08), transparent 27rem),
    linear-gradient(180deg, var(--canvas-top), var(--canvas-mid) 48%, var(--canvas-bottom));
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

main {
  width: min(100%, 760px);
  margin: 0 auto;
  padding:
    max(22px, env(safe-area-inset-top))
    20px
    calc(72px + env(safe-area-inset-bottom));
}

nav {
  margin-bottom: 18px;
}

:root[data-theme="dark"] nav {
  display: none;
}

nav a {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid rgba(78, 143, 255, 0.24);
  border-radius: 999px;
  background: rgba(78, 143, 255, 0.1);
  color: var(--blue);
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  text-decoration: none;
}

h1 {
  margin: 0;
  color: var(--text);
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.document-summary {
  margin-top: 5px;
  color: var(--muted);
  font-size: 0.94rem;
  line-height: 1.35;
}

h2 {
  margin: 18px 0 0;
  padding: 16px 16px 0;
  border: 1px solid var(--stroke);
  border-bottom: 0;
  border-radius: 22px 22px 0 0;
  background: var(--surface);
  color: var(--text);
  font-size: 1.04rem;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

p,
li {
  color: var(--muted);
  font-size: 1rem;
}

p {
  margin: 0;
}

.meta {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  margin-top: 7px;
  color: var(--green);
  font-size: 0.78rem;
  font-weight: 650;
}

.card {
  padding: 16px;
  border: 1px solid var(--stroke);
  border-radius: 22px;
  background: var(--surface);
  box-shadow:
    0 12px 28px rgba(0, 0, 0, 0.18),
    inset 0 1px rgba(255, 255, 255, 0.025);
}

.card {
  margin-top: 18px;
}

.card p {
  color: #bdc5d2;
}

h2 + p {
  margin: 0;
  padding: 7px 16px 16px;
  border: 1px solid var(--stroke);
  border-top: 0;
  border-radius: 0 0 22px 22px;
  background: var(--surface);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.18);
}

a {
  color: var(--blue);
  font-weight: 650;
  text-decoration: none;
}

a:focus-visible {
  outline: 3px solid rgba(78, 143, 255, 0.55);
  outline-offset: 3px;
}

.links {
  display: grid;
  gap: 12px;
  margin-top: 28px;
}

a.card {
  display: block;
  margin-top: 0;
  color: var(--muted);
  transition: background-color 160ms ease, border-color 160ms ease, transform 160ms ease;
}

a.card strong {
  display: block;
  margin-bottom: 5px;
  color: var(--text);
  font-size: 1.05rem;
}

@media (hover: hover) {
  a.card:hover {
    border-color: rgba(78, 143, 255, 0.34);
    background-color: var(--surface-raised);
    transform: translateY(-1px);
  }
}

@media (min-width: 680px) {
  main {
    padding-top: 36px;
    padding-right: 28px;
    padding-left: 28px;
  }

  h1 {
    font-size: 2rem;
  }

  .card {
    padding: 20px;
  }

  h2 {
    padding: 20px 20px 0;
  }

  h2 + p {
    padding: 8px 20px 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  a.card {
    transition: none;
  }
}