:root {
  color-scheme: dark light;
  --bg: #0d1117;
  --bg-elev: #151b23;
  --fg: #e6edf3;
  --muted: #8b98a7;
  --line: #232c37;
  --accent: #4fd1b5;
  --accent-ink: #06231d;
  --code-bg: #10161d;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #fafaf8;
    --bg-elev: #ffffff;
    --fg: #14181d;
    --muted: #5a6572;
    --line: #e3e6ea;
    --accent: #0b7a66;
    --accent-ink: #ffffff;
    --code-bg: #f1f3f5;
  }
}

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 400 1.0625rem/1.65 var(--font);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1 0 auto;
}

img {
  display: block;
}

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

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

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

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: var(--accent-ink);
  padding: 0.5rem 0.9rem;
  z-index: 10;
}

.skip:focus {
  left: 1rem;
  top: 1rem;
}

.wrap {
  width: 100%;
  max-width: 60rem;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.prose {
  max-width: 42rem;
}

/* Header */

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

.bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  min-height: 4rem;
  padding-top: 0.5rem;
  padding-bottom: 0.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--fg);
  text-decoration: none;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.brand em {
  font-style: normal;
  font-weight: 400;
  font-family: var(--mono);
  font-size: 0.9em;
  color: var(--muted);
}

.nav {
  display: flex;
  gap: 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
  padding: 0.25rem 0;
  border-bottom: 2px solid transparent;
}

.nav a:hover,
.nav a[aria-current="page"] {
  color: var(--fg);
  border-bottom-color: var(--accent);
}

/* Headings and hero */

h1,
h2,
h3 {
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  letter-spacing: -0.025em;
  margin: 0.5rem 0 1rem;
}

.hero {
  padding: 4rem 0 2.25rem;
}

.eyebrow {
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0;
}

.lede {
  color: var(--muted);
  font-size: 1.15rem;
  max-width: 38rem;
  margin: 0;
}

/* Post cards */

.cards {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fill, minmax(16rem, 1fr));
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding: 1.4rem;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 12px;
  transition: border-color 0.15s ease;
}

.card:hover,
.card:focus-within {
  border-color: var(--accent);
}

.card h2 {
  font-size: 1.15rem;
  line-height: 1.3;
  margin: 0;
}

.card h2 a {
  color: var(--fg);
  text-decoration: none;
}

.card h2 a::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 12px;
}

.card .excerpt {
  margin: 0;
  color: var(--muted);
  font-size: 0.98rem;
}

.card .meta {
  margin-top: auto;
}

.num {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--muted);
}

.meta {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--muted);
  margin: 0;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.tags li {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.1rem 0.6rem;
}

/* Articles and text pages */

.article {
  padding: 3rem 0 2rem;
}

.article h1 {
  font-size: clamp(1.8rem, 4.5vw, 2.5rem);
  margin-top: 0.75rem;
}

.article h2 {
  font-size: 1.4rem;
  margin: 2.4rem 0 0.6rem;
}

.article p {
  margin: 0 0 1.1rem;
}

.article .lead {
  font-size: 1.15rem;
  color: var(--muted);
}

.article ul,
.article ol {
  padding-left: 1.3rem;
  margin: 0 0 1.1rem;
}

.article li {
  margin-bottom: 0.4rem;
}

.article .meta {
  margin-bottom: 1.5rem;
}

code {
  font-family: var(--mono);
  font-size: 0.9em;
  background: var(--code-bg);
  padding: 0.12em 0.35em;
  border-radius: 5px;
}

pre {
  background: var(--code-bg);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1rem 1.1rem;
  margin: 0 0 1.25rem;
  overflow-x: auto;
  line-height: 1.5;
  font-size: 0.88rem;
}

pre code {
  background: none;
  padding: 0;
  font-size: inherit;
}

.takeaways {
  margin: 2.2rem 0 0;
  padding: 0.2rem 0 0.2rem 1.1rem;
  border-left: 3px solid var(--accent);
}

.takeaways h2 {
  margin-top: 0;
  font-size: 1.1rem;
}

.post-nav {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}

/* 404 */

.notfound {
  padding: 5rem 0 3rem;
}

.big {
  font-family: var(--mono);
  font-size: clamp(4rem, 14vw, 8rem);
  line-height: 1;
  color: var(--accent);
  margin: 0;
}

/* Footer */

.site-footer {
  flex-shrink: 0;
  margin-top: 3rem;
  padding: 1.75rem 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

.footer-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 1rem;
}

.footer-row p {
  margin: 0;
}

@media (max-width: 30rem) {
  .hero {
    padding-top: 2.5rem;
  }

  .nav {
    gap: 1rem;
  }
}