/* Antiserum Pages. Self-contained. No CDN. No telemetry. */

:root {
  color-scheme: dark;
  --bg: #0c0d0c;
  --fg: #f2f0ea;
  --muted: #b4afa6;
  --line: #2c312e;
  --panel: #141816;
  --code: #1a1f1c;
  --accent: #c8f542;
  --link: #8ee0a8;
  --link-hover: #c8f542;
  --focus: #e6b84d;
  --max: 52rem;
}

@media (prefers-color-scheme: light) {
  :root {
    color-scheme: light;
    --bg: #f6f4ee;
    --fg: #161814;
    --muted: #5c5a54;
    --line: #d4d0c6;
    --panel: #fffdf7;
    --code: #ece8de;
    --accent: #3d5c00;
    --link: #0d5c38;
    --link-hover: #174a12;
    --focus: #8a5a00;
  }
}

* {
  box-sizing: border-box;
}

html {
  font: 16px/1.55 ui-monospace, SFMono-Regular, Menlo, Consolas,
    "Liberation Mono", monospace;
  background: var(--bg);
  color: var(--fg);
}

body {
  margin: 0;
  min-height: 100vh;
}

.skip {
  position: absolute;
  left: 0.75rem;
  top: -3rem;
  background: var(--accent);
  color: #111;
  padding: 0.35rem 0.6rem;
  z-index: 2;
}

.skip:focus {
  top: 0.75rem;
}

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

nav {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0.85rem 1.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem 1.25rem;
  align-items: baseline;
}

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

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

nav .mark {
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.02em;
}

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
}

footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.85rem;
}

footer p {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1rem 1.25rem 1.75rem;
}

h1,
h2,
h3,
h4 {
  line-height: 1.25;
  font-weight: 700;
  text-wrap: balance;
}

h1 {
  font-size: 1.65rem;
  margin: 0 0 0.85rem;
}

h2 {
  font-size: 1.15rem;
  margin: 2rem 0 0.65rem;
  padding-top: 0.35rem;
  border-top: 1px solid var(--line);
}

h3 {
  font-size: 1rem;
  margin: 1.4rem 0 0.45rem;
}

p,
ul,
ol,
pre,
table {
  margin: 0 0 1rem;
}

main > h1 + p,
.lead {
  color: var(--fg);
  font-size: 1.02rem;
}

a {
  color: var(--link);
  text-underline-offset: 0.15em;
}

a:hover {
  color: var(--link-hover);
}

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

code,
kbd {
  font-family: inherit;
  font-size: 0.92em;
  background: var(--code);
  padding: 0.1em 0.28em;
  border-radius: 3px;
}

pre {
  background: var(--code);
  border: 1px solid var(--line);
  padding: 0.85rem 1rem;
  overflow: auto;
  border-radius: 4px;
}

pre code {
  background: none;
  padding: 0;
  font-size: 0.86rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

th,
td {
  border: 1px solid var(--line);
  padding: 0.4rem 0.55rem;
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--panel);
}

hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 1.75rem 0;
}

blockquote {
  margin: 0 0 1rem;
  padding: 0.15rem 0 0.15rem 0.9rem;
  border-left: 3px solid var(--accent);
  color: var(--muted);
}

img {
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
  background: var(--panel);
}

ul.post-list {
  list-style: none;
  padding: 0;
}

ul.post-list li {
  display: grid;
  grid-template-columns: 7.5rem 1fr;
  gap: 0.75rem;
  padding: 0.45rem 0;
  border-bottom: 1px solid var(--line);
}

ul.post-list time {
  color: var(--muted);
}

.muted,
.hint {
  color: var(--muted);
  font-size: 0.9rem;
}

.constraints {
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 0.75rem 1rem 0.25rem;
  margin: 0 0 1.25rem;
}

.constraints h2 {
  border: 0;
  margin-top: 0;
  padding-top: 0;
}

@media (max-width: 40rem) {
  ul.post-list li {
    grid-template-columns: 1fr;
    gap: 0.15rem;
  }
}

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