/* Shared by the static landing pages under /calcs/learn/. No JavaScript, no web fonts, light and dark. */
:root {
  --bg: #ffffff;
  --fg: #1c2129;
  --dim: #55606f;
  --line: #d9dee6;
  --soft: #f3f5f8;
  --accent: #0a5fb4;
  --accent-fg: #ffffff;
  --code-bg: #f3f5f8;
  --ok: #17663a;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171d;
    --fg: #e7ebf2;
    --dim: #a3adbb;
    --line: #2d3440;
    --soft: #1b2028;
    --accent: #5aa9ff;
    --accent-fg: #0b1018;
    --code-bg: #1b2028;
    --ok: #62d08f;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 1.0625rem/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
a { color: var(--accent); text-underline-offset: 0.15em; }
a:focus-visible, .button:focus-visible, video:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.skip { position: absolute; left: -999px; top: 0; background: var(--bg); padding: 0.5rem 1rem; z-index: 10; }
.skip:focus { left: 0; }
header.site, footer.site, main { width: 100%; max-width: 46rem; margin: 0 auto; padding-left: 16px; padding-right: 16px; }
header.site { display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; align-items: baseline; justify-content: space-between; padding-top: 1rem; padding-bottom: 0.75rem; border-bottom: 1px solid var(--line); max-width: none; padding-left: max(16px, calc((100% - 46rem) / 2 + 16px)); padding-right: max(16px, calc((100% - 46rem) / 2 + 16px)); }
.brand { font-weight: 700; color: var(--fg); text-decoration: none; }
header.site nav { display: flex; flex-wrap: wrap; gap: 0.25rem 1.25rem; font-size: 0.95rem; }
main { padding-top: 1.25rem; padding-bottom: 2rem; }
.crumbs { font-size: 0.875rem; color: var(--dim); margin-bottom: 0.5rem; }
h1 { font-size: clamp(1.6rem, 5vw, 2.2rem); line-height: 1.2; margin: 0.25rem 0 1rem; }
h2 { font-size: 1.4rem; line-height: 1.3; margin: 2rem 0 0.5rem; }
h3 { font-size: 1.1rem; line-height: 1.35; margin: 1.25rem 0 0.25rem; }
p, ul, ol { margin: 0.6rem 0; }
li { margin: 0.25rem 0; }
.lead { font-size: 1.15rem; color: var(--fg); }
.cta { display: flex; flex-wrap: wrap; gap: 0.75rem; margin: 1.25rem 0; }
.button { display: inline-block; padding: 0.6rem 1.1rem; border-radius: 6px; background: var(--accent); color: var(--accent-fg); text-decoration: none; font-weight: 600; border: 2px solid var(--accent); }
.button.ghost { background: transparent; color: var(--accent); }
.button:hover { filter: brightness(1.08); }
pre, code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.875rem; }
code { background: var(--code-bg); padding: 0.1em 0.3em; border-radius: 3px; }
pre { background: var(--code-bg); border: 1px solid var(--line); border-radius: 6px; padding: 0.75rem 1rem; overflow-x: auto; line-height: 1.45; max-height: 32rem; }
pre code { background: none; padding: 0; }
table { border-collapse: collapse; width: 100%; margin: 0.75rem 0; font-size: 0.95rem; display: block; overflow-x: auto; }
th, td { border: 1px solid var(--line); padding: 0.4rem 0.6rem; text-align: left; vertical-align: top; }
th { background: var(--soft); }
.v { font-variant-numeric: tabular-nums; white-space: nowrap; font-weight: 600; }
figure.video { margin: 1.5rem 0; }
figure.video video { width: 100%; height: auto; aspect-ratio: 16 / 9; background: #000; border-radius: 6px; }
figcaption { font-size: 0.875rem; color: var(--dim); margin-top: 0.25rem; }
.note { border-left: 4px solid var(--accent); background: var(--soft); padding: 0.1rem 1rem; margin: 1rem 0; }
.try iframe.embed { display: block; width: 100%; height: 560px; border: 1px solid var(--line); border-radius: 6px; margin: 0.75rem 0 0.25rem; background: var(--soft); }
.try .fallback { font-size: 0.875rem; color: var(--dim); margin-top: 0.25rem; }
.faq h3 { margin-top: 1rem; }
.related ul { padding-left: 1.2rem; }
footer.site { border-top: 1px solid var(--line); color: var(--dim); font-size: 0.875rem; padding-top: 1rem; padding-bottom: 2rem; max-width: 46rem; }
@media (max-width: 480px) {
  body { font-size: 1rem; }
  .button { width: 100%; text-align: center; }
}
@media print { header.site nav, .cta, video, .try { display: none; } }