:root {
  color-scheme: light dark;
  --canvas: #f4f0e8;
  --card: #fffcf8;
  --label: #141210;
  --secondary: #5c564e;
  --tertiary: #6e675f;
  --signal: #ff5a36;
  --signal-text: #9e341f;
  --on-signal: #141210;
  --separator: rgba(20, 18, 16, 0.12);
  --fill: rgba(20, 18, 16, 0.06);
  --code-bg: #141210;
  --code-fg: #f4f0e8;
  --mark-square: #141210;
  --focus: #ff5a36;
}

@media (prefers-color-scheme: dark) {
  :root {
    --canvas: #141210;
    --card: #1e1c19;
    --label: #f4f0e8;
    --secondary: #c8c0b6;
    --tertiary: #a39c94;
    --signal: #ff5a36;
    --signal-text: #ff8a6a;
    --on-signal: #141210;
    --separator: rgba(244, 240, 232, 0.14);
    --fill: rgba(244, 240, 232, 0.08);
    --code-bg: #0e0d0b;
    --code-fg: #f4f0e8;
    --mark-square: #f4f0e8;
    --focus: #ff8a6a;
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  min-height: 100vh;
  background: var(--canvas);
  color: var(--label);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.5;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--signal-text);
  text-underline-offset: 0.18em;
}

a:hover {
  text-decoration-thickness: 2px;
}

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

.skip {
  position: absolute;
  left: 16px;
  top: 8px;
  transform: translateY(-150%);
  background: var(--signal);
  color: var(--on-signal);
  padding: 8px 12px;
  border-radius: 10px;
  font-weight: 600;
  text-decoration: none;
  z-index: 2;
}

.skip:focus {
  transform: none;
}

.wrap {
  width: min(42rem, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  border-bottom: 1px solid var(--separator);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 64px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--label);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.02em;
  text-decoration: none;
  min-height: 44px;
}

.mark {
  position: relative;
  width: 28px;
  height: 28px;
  flex: none;
}

.mark-block,
.mark-square {
  position: absolute;
  display: block;
}

.mark-block {
  top: 0;
  left: 0;
  width: 20px;
  height: 20px;
  border-radius: 5px;
  background: var(--signal);
}

.mark-square {
  right: 0;
  bottom: 0;
  width: 10px;
  height: 10px;
  border-radius: 3px;
  background: var(--mark-square);
}

.nav {
  display: flex;
  gap: 4px;
}

.nav a {
  color: var(--secondary);
  text-decoration: none;
  font-size: 15px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding: 0 10px;
  border-radius: 10px;
}

.nav a[aria-current="page"] {
  color: var(--label);
  background: var(--fill);
}

main {
  padding: 40px 0 64px;
}

.lede {
  max-width: 38rem;
}

h1 {
  margin: 0 0 16px;
  font-size: 34px;
  line-height: 1.2;
  letter-spacing: -0.03em;
  font-weight: 700;
}

h2 {
  margin: 40px 0 8px;
  font-size: 22px;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

h3 {
  margin: 28px 0 8px;
  font-size: 17px;
  line-height: 1.3;
}

p,
ul,
ol {
  margin: 0 0 16px;
}

ul,
ol {
  padding-left: 1.25rem;
}

li + li {
  margin-top: 6px;
}

.meta {
  color: var(--secondary);
  font-size: 15px;
  margin-bottom: 24px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 18px;
  border-radius: 999px;
  background: var(--signal);
  color: var(--on-signal);
  font-weight: 600;
  text-decoration: none;
}

.button.secondary {
  background: transparent;
  color: var(--label);
  box-shadow: inset 0 0 0 1px var(--separator);
}

.card {
  background: var(--card);
  border-radius: 16px;
  padding: 4px 20px 8px;
  margin-top: 8px;
}

.card h2:first-child,
.card h3:first-child {
  margin-top: 16px;
}

pre {
  margin: 0 0 16px;
  padding: 16px;
  overflow-x: auto;
  background: var(--code-bg);
  color: var(--code-fg);
  border-radius: 12px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 13px;
  line-height: 1.45;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.92em;
}

.site-footer {
  border-top: 1px solid var(--separator);
  padding: 24px 0 40px;
  color: var(--tertiary);
  font-size: 13px;
}

.site-footer a {
  color: var(--secondary);
}

@media (max-width: 560px) {
  h1 {
    font-size: 30px;
  }

  .site-header .wrap {
    min-height: 56px;
  }
}