:root {
  color-scheme: light dark;
  --bg: #fbfbf9;
  --surface: #eef0f2;
  --text: #1b1d21;
  --muted: #545a63;
  --rule: #d9dce1;
  --pill-border: #868d97;
  --accent: #0b5cad;
  --focus: #0b5cad;
  --radius: 10px;
  --gutter: 16px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121418;
    --surface: #1d2127;
    --text: #e7e9ec;
    --muted: #a5abb4;
    --rule: #2e333b;
    --pill-border: #5c6470;
    --accent: #80b9ff;
    --focus: #80b9ff;
  }
}

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 1.125rem;
  line-height: 1.6;
  overflow-wrap: break-word;
}

img,
video,
svg {
  max-width: 100%;
}

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

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

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

code {
  font-family: var(--mono);
  font-size: 0.9em;
  overflow-wrap: anywhere;
}

h1,
h2,
h3 {
  line-height: 1.2;
  margin: 0 0 0.5em;
}

h1 {
  font-size: clamp(2.25rem, 7vw, 3.5rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: 1.375rem;
  margin-top: 2rem;
}

h3 {
  font-size: 1.0625rem;
}

p,
ul {
  margin: 0 0 1rem;
}

.wrap {
  width: 100%;
  max-width: 68rem;
  margin: 0 auto;
  padding-inline: var(--gutter);
}

.prose {
  max-width: 72ch;
}

.skip {
  position: absolute;
  left: var(--gutter);
  top: -100px;
  z-index: 10;
  padding: 0.5rem 0.75rem;
  background: var(--text);
  color: var(--bg);
  border-radius: var(--radius);
}

.skip:focus {
  top: 0.5rem;
}

/* Header and nav */

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

.site-header .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.25rem 1.5rem;
  padding-block: 0.875rem;
}

.site-name {
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--text);
  text-decoration: none;
}

.site-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45em;
  color: var(--text);
}

.icon {
  width: 1em;
  height: 1em;
  flex: none;
  fill: currentColor;
}

/* Topic nav: one link per section, sticky on wide screens */

.topics {
  background: var(--bg);
  border-bottom: 1px solid var(--rule);
}

.topics ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.5rem;
  margin: 0;
  padding: 0.625rem 0;
  list-style: none;
}

.topics a {
  color: var(--text);
  text-decoration: none;
  display: inline-block;
  padding-block: 0.25rem;
  font-weight: 600;
}

.topics a:hover,
.topics a[aria-current="page"] {
  text-decoration: underline;
  text-decoration-thickness: 2px;
}

@media (min-width: 720px) {
  .topics {
    position: sticky;
    top: 0;
    z-index: 5;
  }

  .topic {
    scroll-margin-top: 4rem;
  }
}

main {
  padding-block: 2rem 3rem;
}

/* Placeholder-backed media: the real poster is the top layer, placeholder.svg sits below it. */

.media {
  display: block;
  background-color: var(--surface);
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  border-radius: var(--radius);
  overflow: hidden;
}

/* Intro */

.tagline {
  font-size: 1.3125rem;
  color: var(--muted);
  margin-bottom: 1.25rem;
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 1.25rem 0 0;
  padding: 0;
  list-style: none;
}

.links a,
.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  padding: 0.5em 0.9em;
  border: 1px solid var(--pill-border);
  border-radius: 999px;
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
  line-height: 1.25;
  text-decoration: none;
  overflow-wrap: anywhere;
}

.links a:hover,
.pill:hover {
  border-color: var(--accent);
  background: var(--surface);
  color: var(--accent);
}

.links a:focus-visible,
.pill:focus-visible {
  border-color: var(--accent);
  outline-offset: 2px;
  border-radius: 999px;
}

/* Topics and showcases */

.section-note {
  margin-top: 2.5rem;
  color: var(--muted);
  font-size: 0.9375rem;
  font-style: italic;
}

.topic {
  border-top: 2px solid var(--rule);
  margin-top: 3rem;
  padding-top: 2rem;
}

.topic h2 {
  font-size: 1.75rem;
  margin-top: 0;
}

.showcase + .showcase {
  margin-top: 4.5rem;
}

.showcase h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

.showcase p {
  max-width: 70ch;
  margin-bottom: 1.1em;
}

.showcase .lead {
  font-weight: 650;
  margin-bottom: 0.6em;
}

.showcase .note {
  color: var(--muted);
}

.showcase .details {
  margin-top: 1.75rem;
  color: var(--muted);
  font-size: 1rem;
}

.showcase .replay {
  margin-top: -0.4em;
  color: var(--muted);
  font-size: 0.9375rem;
}

.clip {
  max-width: 960px;
  margin: 0 0 1.25rem;
}

.clip .frame {
  aspect-ratio: 16 / 9;
}

.clip video {
  display: block;
  width: 100%;
  height: 100%;
}

.clip figcaption {
  color: var(--muted);
  font-size: 0.9375rem;
  margin-top: 0.5rem;
}

.clip-heading {
  margin: 1.75rem 0 0.6rem;
  color: var(--muted);
  font-size: 1rem;
  font-weight: 600;
}

.clip-file {
  display: block;
  margin-top: 0.25rem;
}

.clip-note {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.875rem;
  font-style: italic;
}

/* Replay clips page */

.replay-entry {
  border-top: 2px solid var(--rule);
  margin-top: 2.5rem;
  padding-top: 1.5rem;
}

.replay-entry h2 {
  margin-top: 0;
}

.facts {
  display: grid;
  grid-template-columns: max-content minmax(0, 1fr);
  gap: 0.3rem 1rem;
  max-width: 72ch;
  margin: 0 0 1rem;
}

.facts dt {
  color: var(--muted);
  font-weight: 600;
}

.facts dd {
  margin: 0;
  overflow-wrap: anywhere;
}

.back {
  margin-top: 3rem;
}

/* Title rows: a heading with buttons beside it. After the heading rules above, so margin: 0 wins. */

.title-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1rem;
  margin-bottom: 0.75rem;
}

.title-row h1,
.title-row h2,
.title-row h3 {
  margin: 0;
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 0.9375rem;
}

.site-footer .wrap {
  padding-block: 1.25rem 2rem;
}

.site-footer p {
  margin: 0;
}

@media (min-width: 640px) {
  :root {
    --gutter: 24px;
  }
}