:root {
  --color-background: #eef2f0;
  --color-surface: #f8faf9;
  --color-surface-muted: #e2e8e5;
  --color-text: #13201b;
  --color-text-muted: #4a5c54;
  --color-border: #b8c4be;
  --color-accent: #0c6b5c;
  --color-accent-hover: #095447;
  --color-accent-contrast: #ffffff;
  --color-warning: #9a6b14;
  --font-sans: "IBM Plex Sans", "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --max-width: 72rem;
  --max-width-narrow: 42rem;
  --header-height: 4rem;
  --radius-sm: 0.25rem;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  color: var(--color-text);
  background:
    radial-gradient(ellipse 80% 50% at 10% -10%, color-mix(in srgb, var(--color-accent) 12%, transparent), transparent 55%),
    linear-gradient(color-mix(in srgb, var(--color-border) 35%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--color-border) 35%, transparent) 1px, transparent 1px),
    var(--color-background);
  background-size: auto, 48px 48px, 48px 48px, auto;
  line-height: 1.65;
}

a {
  color: inherit;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -100%;
  z-index: 100;
  padding: 0.5rem 1rem;
  background: var(--color-accent);
  color: var(--color-accent-contrast);
  text-decoration: none;
}

.skip-link:focus {
  top: 1rem;
}

.container {
  width: min(100% - 2rem, var(--max-width));
  margin-inline: auto;
}

.prose-narrow {
  max-width: var(--max-width-narrow);
}

.section {
  padding-block: 4rem;
}

.header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid color-mix(in srgb, var(--color-border) 70%, transparent);
  background: color-mix(in srgb, var(--color-background) 88%, transparent);
  backdrop-filter: blur(10px);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: var(--header-height);
}

.brand {
  display: inline-flex;
  flex-direction: column;
  text-decoration: none;
  line-height: 1.1;
}

.brand__name {
  font-weight: 700;
}

.brand__sub {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.nav {
  display: none;
  gap: 1.25rem;
}

.nav a {
  text-decoration: none;
  color: var(--color-text-muted);
  font-weight: 500;
}

.header__actions {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.lang {
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

.lang a {
  text-decoration: none;
  color: var(--color-text-muted);
}

.btn {
  display: inline-flex;
  align-items: center;
  min-height: 2.5rem;
  padding: 0.55rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--color-accent);
  color: var(--color-accent-contrast);
  text-decoration: none;
  font-weight: 600;
}

.h1 {
  margin: 0 0 1.25rem;
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  line-height: 1.15;
}

.muted {
  color: var(--color-text-muted);
}

.todo-marker {
  display: inline-flex;
  margin: 0 0 0.75rem;
  padding: 0.15rem 0.45rem;
  border: 1px dashed var(--color-warning);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-warning);
  background: color-mix(in srgb, var(--color-warning) 8%, transparent);
}

.legal-content {
  display: grid;
  gap: 0.75rem;
}

.legal-content :is(h1, h2, h3, h4) {
  margin: 1.25rem 0 0.5rem;
  line-height: 1.3;
}

.legal-content p,
.legal-content li {
  color: var(--color-text);
}

.legal-content a {
  color: var(--color-accent);
}

.footer {
  margin-top: 4rem;
  padding-block: 3rem 2rem;
  border-top: 1px solid var(--color-border);
  background: color-mix(in srgb, var(--color-surface) 80%, transparent);
}

.footer__grid {
  display: grid;
  gap: 2rem;
}

.footer__brand {
  margin: 0 0 0.75rem;
  font-weight: 700;
}

.footer__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}

.footer__links a {
  text-decoration: none;
  color: var(--color-text-muted);
}

.footer__meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid color-mix(in srgb, var(--color-border) 70%, transparent);
  font-size: 0.875rem;
}

.footer__meta a {
  text-decoration: none;
  color: var(--color-accent);
}

@media (min-width: 960px) {
  .nav {
    display: flex;
  }

  .footer__grid {
    grid-template-columns: 2fr 1fr;
  }
}