:root {
  color-scheme: dark;
  --bg: #0d0d10;
  --surface: #121317;
  --surface-raised: #16181d;
  --ink: #ece9e4;
  --muted: #a9aeb8;
  --quiet: #7f8794;
  --line: #23262c;
  --line-strong: #3d4250;
  --focus: #c8c2b6;
  --max: 76rem;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font: 400 1rem/1.7 ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--ink);
  text-decoration-color: #4a505c;
  text-underline-offset: 0.24em;
}

a:hover {
  text-decoration-color: var(--ink);
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

.skip {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 10;
  padding: 0.7rem 1rem;
  background: var(--ink);
  color: var(--bg);
  border-radius: 0.35rem;
}

.skip:focus {
  top: 1rem;
}

.site-header {
  width: min(100% - 2 * 6vw, var(--max));
  margin: 0 auto;
  padding: 1.5rem 0 1.25rem;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem 2rem;
  border-bottom: 1px solid var(--line);
}

.brand {
  color: var(--ink);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-decoration: none;
  text-transform: uppercase;
}

.brand span {
  color: var(--quiet);
  font-weight: 400;
}

.site-header nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
}

.site-header nav a {
  color: var(--muted);
  text-decoration: none;
}

.site-header nav a:hover,
.site-header nav a[aria-current="page"] {
  color: var(--ink);
}

main {
  width: min(100% - 2 * 6vw, var(--max));
  margin: 0 auto;
  padding: 5.5rem 0 6rem;
}

.eyebrow {
  margin: 0 0 1.1rem;
  color: var(--quiet);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1 {
  max-width: 18ch;
  margin: 0 0 1.6rem;
  font-size: clamp(2.4rem, 6.2vw, 4.8rem);
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 0.98;
}

h2 {
  margin: 3.4rem 0 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--quiet);
}

p {
  max-width: 68ch;
  margin: 0 0 1.1rem;
  color: var(--muted);
}

.lede {
  max-width: 62ch;
  margin-bottom: 1.2rem;
  color: var(--ink);
  font-size: clamp(1.08rem, 1.7vw, 1.32rem);
  line-height: 1.55;
}

.meta {
  margin: 0 0 2.8rem;
  color: var(--quiet);
  font-size: 0.82rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 20rem), 1fr));
  gap: 1rem;
  margin: 3.2rem 0 1rem;
}

.card {
  display: grid;
  gap: 0.55rem;
  align-content: start;
  min-height: 13rem;
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: 0.6rem;
  background: var(--surface);
  color: var(--ink);
  text-decoration: none;
  transition: border-color 160ms ease, background 160ms ease, transform 160ms ease;
}

.card:hover {
  border-color: var(--line-strong);
  background: var(--surface-raised);
  transform: translateY(-2px);
}

.card-kicker {
  color: var(--quiet);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
}

.card strong {
  font-size: 1.15rem;
  font-weight: 500;
  line-height: 1.3;
}

.card span:last-child {
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.55;
}

.plain {
  display: grid;
  gap: 0.5rem;
  margin: 0 0 1.2rem;
  padding-left: 1.1rem;
}

.plain li {
  color: var(--muted);
}

ul {
  max-width: 68ch;
  margin: 0 0 1.2rem;
  padding-left: 1.15rem;
}

li {
  margin-bottom: 0.5rem;
}

li::marker {
  color: var(--quiet);
}

.toc {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 1.1rem;
  margin: 0 0 2.5rem;
  padding: 0.95rem 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  font-size: 0.78rem;
}

.toc a {
  color: var(--quiet);
  text-decoration: none;
}

.toc a:hover {
  color: var(--ink);
}

section {
  scroll-margin-top: 1.5rem;
}

.notice {
  max-width: 68ch;
  margin: 1.6rem 0;
  padding: 1rem 1.15rem;
  border-left: 2px solid var(--line-strong);
  background: var(--surface);
  color: var(--ink);
  font-size: 0.92rem;
}

footer {
  width: min(100% - 2 * 6vw, var(--max));
  margin: 0 auto;
  padding: 1.5rem 0 2.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  border-top: 1px solid var(--line);
  color: var(--quiet);
  font-size: 0.78rem;
}

footer a {
  color: var(--quiet);
}

footer a:hover {
  color: var(--ink);
}

@media (max-width: 640px) {
  main {
    padding-top: 3.5rem;
    padding-bottom: 4rem;
  }

  h1 {
    max-width: 14ch;
  }

  .site-header {
    align-items: flex-start;
  }

  .site-header nav {
    gap: 0.9rem;
  }

  .cards {
    margin-top: 2.4rem;
  }

  .card {
    min-height: 0;
  }
}

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

  .card {
    transition: none;
  }
}