/* The demo page, in the website's colours (book/site/styles/tokens.css). The page's security
   policy allows only its own files, so it uses the system's fonts rather than the site's. */
:root {
  --bg: #ffffff;
  --fg: #16181d;
  --fg-2: #3c424c;
  --muted: #6b727e;
  --card: #ffffff;
  --panel: #f4f5f7;
  --line: #e2e5e9;
  --accent: #2f5bd3;
  --pass: #23845a;
  --fail: #c23a4b;
  --code-bg: #f4f5f7;
  --sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --serif: "Newsreader", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111316;
    --fg: #e7e9ec;
    --fg-2: #bcc1c8;
    --muted: #8a919b;
    --card: #15181b;
    --panel: #181b1f;
    --line: #262a30;
    --accent: #6a88ee;
    --pass: #3aa574;
    --fail: #e0677a;
    --code-bg: #181b1f;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.55 var(--sans);
  -webkit-font-smoothing: antialiased;
}

header.site {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 56px;
  padding: 0 max(16px, calc((100% - 72rem) / 2));
  border-bottom: 1px solid var(--line);
  font-size: 0.82rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  color: var(--fg);
  text-decoration: none;
}

header.site nav {
  display: flex;
  gap: 18px;
  overflow-x: auto;
  scrollbar-width: none;
}

@media (max-width: 480px) {
  header.site {
    gap: 16px;
  }

  header.site nav {
    gap: 12px;
  }
}

header.site nav a {
  color: var(--fg-2);
  text-decoration: none;
  white-space: nowrap;
}

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

header.site nav a[aria-current="page"] {
  box-shadow: 0 2px 0 var(--accent);
}

.page {
  max-width: 72rem;
  margin: 0 auto;
  padding: 2.5rem 16px 3rem;
}

.intro {
  max-width: 44rem;
}

h1 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin: 0 0 0.75rem;
}

a {
  color: var(--accent);
  text-underline-offset: 3px;
}

code {
  font-family: var(--mono);
  font-size: 0.86em;
}

.lede,
.meta,
footer {
  color: var(--muted);
}

.lede {
  font-size: 1.05rem;
  color: var(--fg-2);
}

.privacy {
  border-left: 3px solid var(--pass);
  padding: 0.25rem 0.75rem;
  color: var(--fg-2);
}

.drop {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  padding: 3rem 1rem;
  margin: 1.5rem 0;
  border: 1.5px dashed var(--line);
  border-radius: 10px;
  background: var(--panel);
  color: var(--muted);
  cursor: pointer;
  text-align: center;
  transition: border-color 120ms ease, background-color 120ms ease;
}

.drop svg {
  color: var(--accent);
  margin-bottom: 0.25rem;
}

.drop:hover,
.drop.over,
.drop:focus-within {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 6%, var(--panel));
}

.drop .big {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--fg);
}

.drop input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

#status:empty {
  display: none;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 22rem), 1fr));
  gap: 1rem;
}

.grid > h2,
.grid > .meta,
.card.wide {
  grid-column: 1 / -1;
}

.grid > h2 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 1.6rem;
  margin: 1rem 0 0;
  overflow-wrap: anywhere;
}

.grid > .meta {
  margin: 0;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1rem;
  min-width: 0;
}

.card h3 {
  margin: 0 0 0.5rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.summary {
  font-weight: 600;
}

.card img {
  max-width: 100%;
  height: auto;
  image-rendering: pixelated;
  border-radius: 4px;
  background: repeating-conic-gradient(var(--line) 0 25%, transparent 0 50%) 0 0 / 16px 16px;
}

pre {
  margin: 0;
  max-height: 32rem;
  overflow: auto;
  padding: 0.75rem;
  background: var(--code-bg);
  border-radius: 6px;
  font: 12.5px/1.5 var(--mono);
}

.pass {
  color: var(--pass);
  font-weight: 600;
}

.fail,
.error {
  color: var(--fail);
}

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

footer {
  margin-top: 2.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  font-size: 0.85rem;
}