/* Shared by every page under /blog/. Loaded after /styles.css, which owns the tokens. */

/* Same page chrome as the homepage (see the <style> block in /index.html) */
html { scroll-behavior: smooth; scroll-padding-top: 74px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body { margin: 0; text-wrap: pretty; }
a { color: var(--color-accent-700); }
a:hover { color: var(--color-accent-800); }
.nav { gap: 8px 24px; position: sticky; top: 0; z-index: 20; background: var(--color-bg); flex-wrap: wrap;
  padding: 14px max(clamp(20px, 5vw, 72px), calc((100% - 1120px) / 2 + clamp(20px, 5vw, 72px))); }
.nav a.nav-brand { font-size: 18px; letter-spacing: -0.015em; }
.nav a.nav-brand:hover { color: inherit; }
@media (max-width: 640px) {
  .nav { gap: 10px 14px; }
  .nav .nav-brand { flex-basis: 100%; }
  html { scroll-padding-top: 106px; }
}
@media (max-width: 400px) { .nav { gap: 10px 12px; } .nav a { font-size: 13px; } }
@media (max-width: 340px) { .nav { gap: 10px 8px; } }

.page { max-width: 1120px; margin: 0 auto; padding: 0 clamp(20px, 5vw, 72px); }
.site-footer { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 28px; padding: 42px 0;
  font-size: 13px; line-height: 26px; color: color-mix(in srgb, var(--color-text) 70%, transparent); }

.muted { color: color-mix(in srgb, var(--color-text) 70%, transparent); }
.kicker { margin: 0; font-size: 12px; letter-spacing: 0.09em; text-transform: uppercase;
  color: color-mix(in srgb, var(--color-text) 70%, transparent); }
.rule { height: 5px; border: 0; margin: 0; border-top: 2px solid var(--color-text); border-bottom: 1px solid var(--color-text); }

/* Blog index */
.blog-head { padding: clamp(36px, 5vw, 80px) 0 40px; }
.blog-head h1 { font-size: 32px; line-height: 1.15; letter-spacing: -0.015em; margin: 0; }
.blog-head p { font-size: 18px; line-height: 28px; max-width: 58ch; margin: 18px 0 0;
  color: color-mix(in srgb, var(--color-text) 78%, transparent); }
.post-list { display: grid; gap: 36px; max-width: 88ch; padding: 32px 0 84px; }
.post-list article { display: grid; grid-template-columns: 160px 1fr; gap: 24px; align-items: start; }
.post-list .post-text { min-width: 0; }
.post-list .post-thumb img { display: block; width: 100%; height: auto; border-radius: var(--radius-md); }
@media (max-width: 480px) { .post-list article { grid-template-columns: 96px 1fr; gap: 16px; } }
.post-list article p { margin: 0; }
.post-list .post-title { margin: 6px 0 0; font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  font-size: 22px; line-height: 30px; letter-spacing: -0.01em; }
.post-list .post-dek { margin: 6px 0 0; font-size: 16px; line-height: 27px; max-width: 72ch;
  color: color-mix(in srgb, var(--color-text) 78%, transparent); }

/* Article */
.post { max-width: 720px; padding: clamp(36px, 5vw, 72px) 0 72px; }
.post h1 { font-size: clamp(30px, 4.4vw, 44px); line-height: 1.1; letter-spacing: -0.022em; margin: 14px 0 0; }
.post .dek { font-size: 19px; line-height: 30px; margin: 18px 0 0;
  color: color-mix(in srgb, var(--color-text) 78%, transparent); }
.post figure { margin: 36px 0 8px; }
.post figure img { width: 100%; max-width: 620px; height: auto; border-radius: var(--radius-md); }
.post figcaption { margin-top: 10px; font-size: 13px; line-height: 20px;
  color: color-mix(in srgb, var(--color-text) 70%, transparent); }
.post h2 { font-size: 24px; line-height: 1.2; letter-spacing: -0.015em; margin: 48px 0 0; }
.post p, .post li { font-size: 18px; line-height: 30px; }
.post p { margin: 20px 0 0; }
.post p.kicker { font-size: 12px; line-height: 20px; margin: 0; }
.post sup, .post sub { line-height: 0; }
/* Math font shipped with the site (STIX Two Math, SIL OFL 1.1, see /fonts/OFL.txt). MathML only joins the
   radical bar and stretches parentheses with a font that has an OpenType MATH table, and many readers have none. */
@font-face { font-family: "STIX Two Math Web"; src: url("/fonts/STIXTwoMath-Regular.woff2") format("woff2"); font-display: swap; }
.post math { font-family: "STIX Two Math Web", "STIX Two Math", "Cambria Math", math; }
.post blockquote { margin: 24px 0 0; padding: 4px 0 4px 22px; border-left: 2px solid var(--color-text);
  font-style: italic; font-size: 19px; line-height: 30px; }
.post blockquote p { margin: 0; }
.post .sources { margin: 20px 0 0; padding-left: 1.2em; display: grid; gap: 8px; }
.post .sources li { font-size: 16px; line-height: 26px; }

/* Article: sub-steps, math, notation aside, figures */
.post h3 { font-size: 19px; line-height: 1.3; letter-spacing: -0.01em; margin: 36px 0 0; }
.post .math-block { margin: 20px 0 0; padding: 4px 0; overflow-x: auto; overflow-y: hidden; }
.post .math-block math { font-size: 19px; }
@media (max-width: 480px) { .post .math-block math { font-size: 16px; } }
.post .notation { margin: 28px 0 0; padding: 16px 20px 18px; border: 1px solid var(--color-divider);
  border-radius: var(--radius-md); background: var(--color-surface); }
.post .notation p, .post .notation li { font-size: 16px; line-height: 26px; }
.post .notation p { margin: 10px 0 0; }
.post .notation p.notation-title { margin: 0; font-size: 12px; line-height: 20px; letter-spacing: 0.09em;
  text-transform: uppercase; color: color-mix(in srgb, var(--color-text) 70%, transparent); }
.post .notation ul { margin: 8px 0 0; padding-left: 1.2em; display: grid; gap: 4px; }

.post figure.truth { margin: 28px 0 0; overflow-x: auto; }
.truth-grid { border-collapse: collapse; font-size: 15px; line-height: 20px; font-variant-numeric: tabular-nums; }
.truth-grid th, .truth-grid td { border: 1px solid var(--color-divider); padding: 8px 10px; text-align: center; white-space: nowrap; }
.truth-grid th { font-weight: 600; background: var(--color-surface); }
.truth-grid .corner { font-weight: 400; font-size: 14px; }
.truth-grid td { color: color-mix(in srgb, var(--color-text) 70%, transparent); }
.truth-grid td.fail { color: var(--color-accent-2); background: color-mix(in srgb, var(--color-accent-2) 8%, transparent); }

.diagram-pair { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 8px 28px; margin: 28px 0 0; }
.diagram-pair figure.diagram { margin: 0; }
.post figure.diagram { margin: 28px 0 0; }
.post figure.diagram svg { display: block; width: 100%; max-width: 620px; height: auto; }
.dg-text { fill: var(--color-text); font-family: var(--font-body); font-size: 15px; }
.dg-small { font-size: 14px; }
.dg-box { fill: none; stroke: var(--color-text); stroke-width: 1.25; }
.dg-dot circle { fill: var(--color-text); }
.dg-clause { fill: color-mix(in srgb, var(--color-accent) 16%, transparent); stroke: var(--color-accent-700); stroke-width: 1.5; stroke-linejoin: round; }
.dg-cross { fill: color-mix(in srgb, var(--color-accent-2) 10%, transparent); stroke: var(--color-accent-2); stroke-width: 1.5; stroke-dasharray: 5 4; stroke-linejoin: round; }
.dg-cross-solid { fill: color-mix(in srgb, var(--color-accent-2) 14%, transparent); stroke: var(--color-accent-2); stroke-width: 1.5; stroke-linejoin: round; }
.dg-line { stroke: var(--color-text); stroke-width: 1.25; }
.dg-measure { fill: var(--color-surface); stroke: var(--color-text); stroke-width: 1.25; }
.dg-read { fill: none; stroke: var(--color-accent-2); stroke-width: 1.75; }
.dg-arrowhead { fill: var(--color-accent-2); }
.dg-axis, .dg-axis line { stroke: var(--color-text); stroke-width: 1.25; }
.dg-guide line { stroke: var(--color-divider); stroke-width: 1; stroke-dasharray: 3 4; }
.dg-target-guide { stroke: var(--color-accent-2); stroke-width: 1; stroke-dasharray: 3 4; }
.dg-curve { fill: none; stroke: var(--color-text); stroke-width: 2; }
.dg-tangent line { stroke: var(--color-accent-700); stroke-width: 3; stroke-linecap: round; }
.dg-known circle { fill: var(--color-accent-700); }
.dg-target { fill: var(--color-bg); stroke: var(--color-accent-2); stroke-width: 2.5; }
.dg-target-label { fill: var(--color-accent-2); font-style: italic; }

/* Inline math matches the body text */
.post p math, .post li math, .post figcaption math { font-size: 1.05em; }

/* Phones: a narrower side gutter so the text column gets more of the screen */
@media (max-width: 480px) {
  .nav { padding-left: 16px; padding-right: 16px; }
  .page { padding-left: 16px; padding-right: 16px; }
}