/* Image Scale Metadata — the site's one stylesheet.
 *
 * The look is deliberately plain: a standard should not look like a product.
 * No logo, no brand colour, nothing that says one implementer owns the format.
 * What it does carry is craft — a measured line length, quiet greys, hairline
 * rules, and the same face in light and dark. The viewer uses the same tokens,
 * so the two pages read as one.
 */

:root {
  --ink: #171717;
  --muted: #6b6b6b;
  --faint: #8e8e8e;
  --bg: #ffffff;
  --panel: #fafafa;
  --line: #e4e4e4;
  --rule: #111111;
  --ok: #1f7a4d;
  --bad: #b3261e;
  --link: #171717;
  --measure: 34rem;
  --sans: -apple-system, BlinkMacSystemFont, "Inter", "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #ededed;
    --muted: #a0a0a0;
    --faint: #8a8a8a;
    --bg: #101010;
    --panel: #171717;
    --line: #2a2a2a;
    --rule: #ededed;
    --ok: #5cc38f;
    --bad: #ff8a80;
    --link: #ededed;
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  font-weight: 350;
  letter-spacing: 0.005em;
}

/* ── The masthead ─────────────────────────────────────────────────────────── */

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

.masthead__inner,
.page,
.colophon__inner {
  margin: 0 auto;
  max-width: 52rem;
  padding: 0 1.5rem;
}

.masthead__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem 2rem;
  padding-top: 1.25rem;
  padding-bottom: 1.25rem;
}

.masthead__name {
  margin: 0;
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.masthead__name a { color: inherit; text-decoration: none; }

.masthead__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
}

.masthead__nav a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
}

.masthead__nav a:hover { color: var(--ink); border-bottom-color: var(--line); }

/* ── The page ─────────────────────────────────────────────────────────────── */

.page { padding-top: 3.5rem; padding-bottom: 4rem; }

.page > * { max-width: var(--measure); }
.page pre, .page > table, .page > .wide { max-width: 100%; }

.page h1 {
  max-width: 28rem;
  margin: 0 0 1.5rem;
  font-size: clamp(1.75rem, 1.2rem + 2vw, 2.5rem);
  font-weight: 300;
  line-height: 1.15;
  letter-spacing: -0.015em;
}

.page h2 {
  margin: 3.5rem 0 1rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  font-size: 1.0625rem;
  font-weight: 500;
  letter-spacing: 0.01em;
}

.page h3 {
  margin: 2.25rem 0 0.75rem;
  font-size: 0.9375rem;
  font-weight: 500;
}

.page h1, .page h2, .page h3, .page p, .page ul, .page ol, .page blockquote { max-width: var(--measure); }
.page li { color: var(--ink); }

.page p { margin: 0 0 1.25rem; }

.page a { color: var(--link); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 0.18em; text-decoration-color: var(--line); }
.page a:hover { text-decoration-color: currentColor; }

.page ul, .page ol { margin: 0 0 1.25rem; padding-left: 1.25rem; }
.page li { margin: 0.35rem 0; }

.page strong { font-weight: 600; }

code, kbd, samp, pre { font-family: var(--mono); }

.page code {
  font-size: 0.85em;
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 0.08em 0.3em;
}

.page pre {
  max-width: 100%;
  overflow-x: auto;
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 1rem 1.15rem;
  font-size: 0.8125rem;
  line-height: 1.6;
}

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

.page blockquote {
  margin: 1.5rem 0;
  padding-left: 1rem;
  border-left: 2px solid var(--rule);
  color: var(--muted);
}

.page table {
  width: 100%;
  max-width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.875rem;
}

.page th, .page td {
  border-bottom: 1px solid var(--line);
  padding: 0.55rem 0.75rem 0.55rem 0;
  text-align: left;
  vertical-align: top;
}

.page th {
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faint);
  border-bottom-color: var(--rule);
}

.page hr { border: 0; border-top: 1px solid var(--line); margin: 3rem 0; }

/* ── The colophon ─────────────────────────────────────────────────────────── */

.colophon {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.75rem;
}

.colophon__inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 2rem;
  padding-top: 1.5rem;
  padding-bottom: 2.5rem;
}

.colophon a { color: inherit; }

@media (max-width: 40rem) {
  body { font-size: 15.5px; }
  .page { padding-top: 2.5rem; }
}