:root {
  color-scheme: light dark;
  --background: #f4f6f8;
  --surface: #ffffff;
  --surface-muted: #eef2f5;
  --text: #17212b;
  --muted: #52606d;
  --border: #d4dce3;
  --accent: #9f2f2f;
  --accent-strong: #7d2222;
  --focus: #1769aa;
  --content-width: 72rem;
  --reading-width: 48rem;
  --radius: 0.9rem;
  --shadow: 0 0.8rem 2.2rem rgb(23 33 43 / 8%);
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: #101417;
    --surface: #181e23;
    --surface-muted: #222a30;
    --text: #f4f7f9;
    --muted: #b9c3cb;
    --border: #38434c;
    --accent: #ef8585;
    --accent-strong: #ffadad;
    --focus: #7cc5ff;
    --shadow: 0 0.8rem 2.2rem rgb(0 0 0 / 24%);
  }
}

* {
  box-sizing: border-box;
}

html {
  font-family:
    ui-sans-serif,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  line-height: 1.6;
  text-size-adjust: 100%;
}

body {
  min-width: 18rem;
  margin: 0;
  color: var(--text);
  background: var(--background);
}

a {
  color: var(--accent);
  text-decoration-thickness: 0.1em;
  text-underline-offset: 0.18em;
}

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

a:focus-visible {
  border-radius: 0.2rem;
  outline: 0.2rem solid var(--focus);
  outline-offset: 0.2rem;
}

.skip-link {
  position: absolute;
  z-index: 10;
  top: 0.5rem;
  left: 0.5rem;
  padding: 0.55rem 0.8rem;
  color: var(--surface);
  background: var(--text);
  border-radius: 0.4rem;
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  color: #ffffff;
  background:
    linear-gradient(135deg, rgb(91 21 21 / 96%), rgb(159 47 47 / 92%)),
    #7d2222;
}

.header-content,
.site-footer,
main {
  width: min(calc(100% - 2rem), var(--content-width));
  margin-inline: auto;
}

.header-content {
  display: flex;
  gap: 1.5rem;
  align-items: center;
  justify-content: space-between;
  min-height: 4.5rem;
}

.brand {
  color: inherit;
  font-size: 1.15rem;
  font-weight: 750;
  letter-spacing: 0.01em;
  text-decoration: none;
}

.brand:hover {
  color: inherit;
}

.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 1rem;
  align-items: center;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav a {
  color: #ffffff;
  font-size: 0.95rem;
  font-weight: 650;
}

main {
  padding-block: clamp(2rem, 6vw, 4.5rem);
}

.reading-width {
  max-width: var(--reading-width);
}

.eyebrow {
  margin: 0 0 0.4rem;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.2;
}