/* ──────────────────────────────────────────────────────────────
   math.im, Blog theme
   Inherits everything from theme-light.css; layered on top of
   each page's inline <style>. Light, scholarly, big serif heads,
   pastel accents. Never bold (cap at 500).
   ────────────────────────────────────────────────────────────── */

/* ── Base typography ─────────────────────────────────────────── */
.blog-shell {
  --paper:    #f9f8f5;
  --paper-2:  #f4f3ee;
  --ink:      #2c2c34;
  --ink-2:    #555560;
  --muted:    #8c8c96;
  --line:     #e5e2d9;
  --indigo:   #5b6abf;
  --indigo-d: #4a58a8;
  --indigo-w: #eef0fb;
  --mint:     #5ca887;
  --mint-w:   #e8f4ee;
  --coral:    #d4726a;
  --coral-w:  #fbe9e6;
  --gold:     #d4a24e;
  --gold-w:   #fbf2dc;
  --violet:   #c4b0f5;
  --violet-w: #f2ecff;
  --r-xl:     22px;
  --r-lg:     16px;
  --r-md:     12px;
  --r-sm:     8px;
  --max:      1120px;
  --reading:  720px;

  background: var(--paper);
  color: var(--ink);
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* ── Soft graph-paper grid behind every page ─────────────────── */
.blog-shell::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(rgba(91,106,191,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(91,106,191,.05) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: radial-gradient(circle at 50% 30%, black 22%, transparent 86%);
  opacity: .42;
}

/* ── Page chrome ─────────────────────────────────────────────── */
.b-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(249,248,245,.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.b-nav-inner {
  width: min(var(--max), calc(100vw - 24px));
  margin: 0 auto;
  padding: 14px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.b-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
}
.b-logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--indigo);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: "Instrument Serif", serif;
  font-size: 22px;
  line-height: 1;
}
.b-logo-text {
  font-family: "Instrument Serif", serif;
  font-size: 22px;
  letter-spacing: -0.01em;
}
.b-logo-text small {
  color: var(--muted);
  font-family: "Inter", sans-serif;
  font-size: 13px;
  margin-left: 6px;
  letter-spacing: 0.02em;
}
.b-nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}
.b-nav-link {
  color: var(--ink-2);
  text-decoration: none;
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 14.5px;
  transition: background .15s ease, color .15s ease;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}
.b-nav-link:hover { background: var(--paper-2); color: var(--ink); }
.b-nav-cta {
  background: var(--indigo);
  color: #fff;
  border-radius: 999px;
  padding: 9px 16px;
  text-decoration: none;
  font-size: 14.5px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  transition: background .15s ease, transform .15s ease;
}
.b-nav-cta:hover { background: var(--indigo-d); transform: translateY(-1px); }

/* ── Page wrapper ────────────────────────────────────────────── */
.b-page {
  position: relative;
  z-index: 1;
  width: min(var(--max), calc(100vw - 24px));
  margin: 0 auto;
  padding: 32px 0 80px;
}

/* ── Hero (landing) ──────────────────────────────────────────── */
.b-hero {
  text-align: center;
  padding: 56px 0 28px;
}
.b-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--ink-2);
  background: #fff;
  border: 1px solid var(--line);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 22px;
}
.b-eyebrow::before {
  content: "";
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--mint);
}
.b-h1 {
  font-family: "Instrument Serif", serif;
  font-size: clamp(2.8rem, 7vw, 5.4rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
  color: var(--ink);
}
.b-h1 em {
  color: var(--indigo);
  font-style: italic;
}
.b-lede {
  font-family: "Instrument Serif", serif;
  font-size: clamp(1.15rem, 1.7vw, 1.45rem);
  line-height: 1.45;
  color: var(--ink-2);
  max-width: 620px;
  margin: 0 auto 32px;
}

/* ── Search ──────────────────────────────────────────────────── */
.b-search {
  max-width: 620px;
  margin: 0 auto 18px;
  position: relative;
}
.b-search input {
  width: 100%;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 999px;
  padding: 16px 22px 16px 50px;
  font: inherit;
  font-size: 16px;
  color: var(--ink);
  outline: none;
  transition: border-color .15s ease, box-shadow .15s ease;
}
.b-search input:focus {
  border-color: var(--indigo);
  box-shadow: 0 0 0 4px rgba(91,106,191,.10);
}
.b-search-icon {
  position: absolute;
  left: 18px; top: 50%;
  transform: translateY(-50%);
  width: 20px; height: 20px;
  color: var(--muted);
  pointer-events: none;
}
.b-search-meta {
  text-align: center;
  color: var(--muted);
  font-size: 13.5px;
  margin: 0 0 28px;
  min-height: 18px;
}

/* ── Pillar chips ────────────────────────────────────────────── */
.b-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin: 0 auto 36px;
  max-width: 920px;
}
.b-chip {
  background: #fff;
  border: 1px solid var(--line);
  color: var(--ink-2);
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 13.5px;
  cursor: pointer;
  transition: background .15s ease, border-color .15s ease, color .15s ease;
  font-family: inherit;
  min-height: 38px;
}
.b-chip:hover { background: var(--paper-2); }
.b-chip.is-active {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
}

/* ── Card grid ───────────────────────────────────────────────── */
.b-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}
@media (min-width: 601px) {
  .b-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 961px) {
  .b-grid { grid-template-columns: repeat(3, 1fr); }
}

.b-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  overflow: hidden;
  text-decoration: none;
  color: var(--ink);
  display: flex;
  flex-direction: column;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.b-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 22px 40px rgba(60,50,40,.06);
  border-color: var(--indigo);
}
.b-card.is-hidden { display: none; }
.b-card-img {
  width: 100%;
  aspect-ratio: 1200 / 830;
  object-fit: cover;
  background: var(--paper-2);
  display: block;
}
.b-card-body {
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
}
.b-card-pillar {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--indigo);
  width: fit-content;
}
.b-card-pillar::before {
  content: "";
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--indigo);
}
.b-card[data-pillar="real-world"] .b-card-pillar { color: var(--mint); }
.b-card[data-pillar="real-world"] .b-card-pillar::before { background: var(--mint); }
.b-card[data-pillar="visual-proof"] .b-card-pillar { color: var(--gold); }
.b-card[data-pillar="visual-proof"] .b-card-pillar::before { background: var(--gold); }
.b-card[data-pillar="probability"] .b-card-pillar { color: var(--coral); }
.b-card[data-pillar="probability"] .b-card-pillar::before { background: var(--coral); }

.b-card-title {
  font-family: "Instrument Serif", serif;
  font-size: 1.55rem;
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 0;
}
.b-card-desc {
  color: var(--ink-2);
  font-size: 14.5px;
  line-height: 1.55;
  margin: 0;
}
.b-card-meta {
  margin-top: auto;
  display: flex;
  gap: 10px;
  align-items: center;
  color: var(--muted);
  font-size: 13px;
}
.b-card-meta-dot {
  width: 3px; height: 3px; border-radius: 50%; background: var(--muted);
}

/* ── Section heading on landing ──────────────────────────────── */
.b-section-h {
  font-family: "Instrument Serif", serif;
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  letter-spacing: -0.01em;
  margin: 56px 0 8px;
  color: var(--ink);
}
.b-section-sub {
  color: var(--ink-2);
  margin: 0 0 28px;
  font-size: 15.5px;
}

/* ── Empty state ─────────────────────────────────────────────── */
.b-empty {
  text-align: center;
  padding: 60px 20px;
  color: var(--muted);
  display: none;
}
.b-empty.is-visible { display: block; }
.b-empty-mark {
  font-family: "Instrument Serif", serif;
  font-size: 3rem;
  color: var(--ink);
  display: block;
  margin-bottom: 8px;
}

/* ──────────────────────────────────────────────────────────────
   Article (single post) styles
   ────────────────────────────────────────────────────────────── */

.b-article {
  position: relative;
  z-index: 1;
}

.b-article-hero {
  width: min(var(--max), calc(100vw - 24px));
  margin: 0 auto;
  padding: 32px 0 12px;
  text-align: center;
}
.b-article-pillar {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--indigo-w);
  color: var(--indigo-d);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 12.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 22px;
}
.b-article-h1 {
  font-family: "Instrument Serif", serif;
  font-size: clamp(2.4rem, 6vw, 4.6rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 0 auto 18px;
  max-width: 18ch;
  color: var(--ink);
}
.b-article-lede {
  font-family: "Instrument Serif", serif;
  font-size: clamp(1.15rem, 1.5vw, 1.4rem);
  line-height: 1.5;
  color: var(--ink-2);
  max-width: 640px;
  margin: 0 auto 28px;
}
.b-article-meta {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px 10px;
  color: var(--muted);
  font-size: 13.5px;
  margin-bottom: 30px;
  padding: 0 12px;
  max-width: 100%;
}
.b-article-meta-dot { width: 3px; height: 3px; border-radius: 50%; background: var(--muted); }

.b-article-img {
  width: min(var(--max), calc(100vw - 24px));
  max-height: 440px;
  margin: 0 auto 36px;
  display: block;
  aspect-ratio: 1200 / 830;
  object-fit: cover;
  object-position: center;
  border-radius: var(--r-xl);
  border: 1px solid var(--line);
  background: var(--paper-2);
}
@media (min-width: 1021px) {
  .b-article-img { max-height: 520px; }
}
@media (max-width: 600px) {
  .b-article-img { max-height: 280px; border-radius: var(--r-lg); }
}

/* ── Reading column ──────────────────────────────────────────── */
.b-prose {
  width: min(var(--reading), calc(100vw - 24px));
  margin: 0 auto;
  font-size: 17.5px;
  line-height: 1.75;
  color: var(--ink);
}
.b-prose > * + * { margin-top: 1.1em; }
.b-prose h2 {
  font-family: "Instrument Serif", serif;
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  letter-spacing: -0.01em;
  margin-top: 2.4em;
  margin-bottom: 0.4em;
  color: var(--ink);
  line-height: 1.2;
}
.b-prose h3 {
  font-family: "Instrument Serif", serif;
  font-size: clamp(1.35rem, 2vw, 1.7rem);
  letter-spacing: -0.01em;
  margin-top: 1.8em;
  margin-bottom: 0.35em;
  color: var(--ink);
  line-height: 1.25;
}
.b-prose p { margin: 0; }
.b-prose a {
  color: var(--indigo);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}
.b-prose a:hover { color: var(--indigo-d); }
.b-prose ul, .b-prose ol {
  padding-left: 1.5em;
}
.b-prose li + li { margin-top: 0.4em; }
.b-prose strong { font-weight: 500; }
.b-prose em { font-style: italic; color: var(--ink-2); }

.b-prose blockquote {
  border-left: 3px solid var(--indigo);
  padding: 4px 0 4px 22px;
  margin: 1.6em 0;
  color: var(--ink-2);
  font-family: "Instrument Serif", serif;
  font-size: 1.35rem;
  line-height: 1.4;
}

.b-prose code {
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 2px 6px;
  font-family: "ui-monospace", "SFMono-Regular", monospace;
  font-size: 0.92em;
}

/* ── Math display blocks ─────────────────────────────────────── */
.b-math {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 22px 18px;
  margin: 1.6em 0;
  text-align: center;
  font-family: "Instrument Serif", serif;
  font-size: clamp(1.3rem, 2.4vw, 1.7rem);
  color: var(--ink);
  overflow-x: auto;
}
.b-math small {
  display: block;
  margin-top: 12px;
  color: var(--muted);
  font-family: "Inter", sans-serif;
  font-size: 13px;
  letter-spacing: 0.02em;
}

/* ── Callouts ────────────────────────────────────────────────── */
.b-callout {
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 22px 24px;
  margin: 1.8em 0;
  background: #fff;
  display: grid;
  gap: 8px;
}
.b-callout-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 11.5px;
  color: var(--muted);
  margin: 0;
}
.b-callout-label::before {
  content: "";
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--indigo);
}
.b-callout p, .b-callout ul, .b-callout ol { margin: 0; }
.b-callout-title {
  font-family: "Instrument Serif", serif;
  font-size: 1.35rem;
  line-height: 1.3;
  color: var(--ink);
  margin: 0;
}

.b-callout.b-quick { background: var(--indigo-w); border-color: rgba(91,106,191,.20); }
.b-callout.b-quick .b-callout-label::before { background: var(--indigo); }

.b-callout.b-mistake { background: var(--coral-w); border-color: rgba(212,114,106,.25); }
.b-callout.b-mistake .b-callout-label::before { background: var(--coral); }

.b-callout.b-aha { background: var(--mint-w); border-color: rgba(92,168,135,.30); }
.b-callout.b-aha .b-callout-label::before { background: var(--mint); }

.b-callout.b-history { background: var(--gold-w); border-color: rgba(212,162,78,.30); }
.b-callout.b-history .b-callout-label::before { background: var(--gold); }

/* ── Side-by-side comparison ─────────────────────────────────── */
.b-compare {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: 1.8em 0;
}
@media (min-width: 601px) {
  .b-compare { grid-template-columns: 1fr 1fr; }
}
.b-compare-pane {
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 20px;
  background: #fff;
}
.b-compare-pane h4 {
  font-family: "Instrument Serif", serif;
  font-size: 1.25rem;
  margin: 0 0 10px;
  color: var(--ink);
}
.b-compare-pane.b-wrong { background: var(--coral-w); border-color: rgba(212,114,106,.25); }
.b-compare-pane.b-right { background: var(--mint-w); border-color: rgba(92,168,135,.30); }

/* ── Step stack ──────────────────────────────────────────────── */
.b-steps {
  display: grid;
  gap: 14px;
  margin: 1.8em 0;
  padding: 0;
  list-style: none;
}
.b-step {
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 16px;
  align-items: start;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 18px 20px;
}
.b-step-num {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--indigo-w);
  color: var(--indigo-d);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: "Instrument Serif", serif;
  font-size: 17px;
  line-height: 1;
}
.b-step-body { line-height: 1.6; }
.b-step-body p { margin: 0; }
.b-step-body p + p { margin-top: 6px; }

/* ── Figure ──────────────────────────────────────────────────── */
.b-figure {
  margin: 1.8em 0;
  text-align: center;
}
.b-figure svg, .b-figure img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
}
.b-figure figcaption {
  margin-top: 12px;
  color: var(--muted);
  font-size: 13.5px;
  font-family: "Inter", sans-serif;
}

/* ── FAQ ─────────────────────────────────────────────────────── */
.b-faq {
  margin: 2.4em 0;
  display: grid;
  gap: 10px;
}
.b-faq details {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 16px 20px;
}
.b-faq details[open] { border-color: var(--indigo); }
.b-faq summary {
  font-family: "Instrument Serif", serif;
  font-size: 1.2rem;
  cursor: pointer;
  color: var(--ink);
  outline: none;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.b-faq summary::-webkit-details-marker { display: none; }
.b-faq summary::after {
  content: "+";
  font-family: "Instrument Serif", serif;
  font-size: 1.6rem;
  color: var(--muted);
  line-height: 1;
}
.b-faq details[open] summary::after { content: "−"; }
.b-faq details > p,
.b-faq details > div {
  margin-top: 12px;
  color: var(--ink-2);
  line-height: 1.7;
}

/* ── Citations ───────────────────────────────────────────────── */
.b-cites {
  margin: 2.6em 0;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}
.b-cites h2 {
  font-family: "Instrument Serif", serif;
  font-size: 1.4rem;
  margin: 0 0 14px;
  color: var(--ink);
}
.b-cites ol {
  padding-left: 22px;
  font-size: 14.5px;
  color: var(--ink-2);
}
.b-cites li + li { margin-top: 8px; }
.b-cites a { color: var(--indigo); }

/* ── Related posts ───────────────────────────────────────────── */
.b-related {
  width: min(var(--max), calc(100vw - 24px));
  margin: 4em auto 0;
}
.b-related h2 {
  font-family: "Instrument Serif", serif;
  font-size: clamp(1.7rem, 3vw, 2.2rem);
  margin: 0 0 18px;
  color: var(--ink);
}

/* ── Solver CTA ──────────────────────────────────────────────── */
.b-cta {
  width: min(var(--reading), calc(100vw - 24px));
  margin: 3.2em auto 0;
  background: var(--ink);
  color: #fff;
  border-radius: var(--r-xl);
  padding: 40px 32px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.b-cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 20%, rgba(196,176,245,.18), transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(91,106,191,.25), transparent 55%);
  pointer-events: none;
}
.b-cta-h {
  font-family: "Instrument Serif", serif;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin: 0 0 10px;
  color: #fff;
  position: relative;
}
.b-cta-sub {
  color: rgba(255,255,255,.75);
  margin: 0 auto 22px;
  max-width: 460px;
  position: relative;
}
.b-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #fff;
  color: var(--ink);
  border-radius: 999px;
  padding: 13px 22px;
  text-decoration: none;
  font-size: 15px;
  position: relative;
  transition: transform .15s ease;
  min-height: 44px;
}
.b-cta-btn:hover { transform: translateY(-1px); }

/* ── Footer ──────────────────────────────────────────────────── */
.b-footer {
  width: min(var(--max), calc(100vw - 24px));
  margin: 4em auto 0;
  padding: 28px 0;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 13.5px;
}
.b-footer a { color: var(--ink-2); text-decoration: none; }
.b-footer a:hover { color: var(--ink); }

/* ──────────────────────────────────────────────────────────────
   Article + sidebar layout (SEO/AEO content engine)
   ────────────────────────────────────────────────────────────── */

.b-layout {
  width: min(var(--max), calc(100vw - 24px));
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  align-items: start;
}
@media (min-width: 1021px) {
  .b-layout {
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 48px;
  }
}

.b-prose-col {
  width: 100%;
  max-width: var(--reading);
  margin: 0 auto;
}
@media (min-width: 1021px) {
  .b-prose-col { margin: 0; }
}

.b-side {
  display: grid;
  gap: 18px;
  min-width: 0;
}
@media (min-width: 1021px) {
  /* Sticky sidebar that scrolls with the page (no nested scrollbar). */
  .b-side {
    position: sticky;
    top: 88px;
    align-self: start;
  }
}
@media (max-width: 1020px) {
  /* On tablet and below, sidebar stacks below content. Add top spacing. */
  .b-side { margin-top: 8px; }
}

.b-side-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 20px 22px;
  font-size: 14px;
  line-height: 1.55;
}
.b-side-card.is-tldr { background: var(--indigo-w); border-color: rgba(91,106,191,.20); }
.b-side-card.is-cta  { background: var(--ink); color: #fff; border-color: var(--ink); padding: 24px; }

.b-side-h {
  font-family: "Instrument Serif", serif;
  font-size: 1.05rem;
  letter-spacing: 0.01em;
  color: var(--ink);
  margin: 0 0 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.b-side-h::before {
  content: "";
  width: 7px; height: 7px; border-radius: 50%; background: var(--indigo);
}
.b-side-card.is-cta .b-side-h { color: #fff; }
.b-side-card.is-cta .b-side-h::before { background: var(--violet); }
.b-side-card.is-tldr .b-side-h::before { background: var(--indigo-d); }

.b-side-card p { margin: 0 0 8px; color: var(--ink-2); }
.b-side-card.is-cta p { color: rgba(255,255,255,.78); }
.b-side-card p:last-child { margin: 0; }

/* Table of contents */
.b-toc { padding: 0; margin: 0; list-style: none; counter-reset: toc; }
.b-toc li { padding: 0 0 0 26px; position: relative; padding-bottom: 8px; }
.b-toc li::before {
  counter-increment: toc;
  content: counter(toc, decimal-leading-zero);
  position: absolute; left: 0; top: 1px;
  font-family: "ui-monospace", monospace;
  font-size: 11px; color: var(--muted);
  letter-spacing: 0.04em;
}
.b-toc a {
  color: var(--ink-2);
  text-decoration: none;
  font-size: 13.5px;
  line-height: 1.45;
  display: block;
  transition: color .15s ease;
}
.b-toc a:hover { color: var(--indigo); }
.b-toc a.is-active { color: var(--ink); font-weight: 500; }

/* People also ask */
.b-paa { display: grid; gap: 8px; }
.b-paa details {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 14px;
  background: #fff;
}
.b-paa details[open] { border-color: var(--indigo); background: var(--paper); }
.b-paa summary {
  cursor: pointer;
  font-size: 13.5px;
  color: var(--ink);
  list-style: none;
  outline: none;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 8px;
}
.b-paa summary::-webkit-details-marker { display: none; }
.b-paa summary::after {
  content: "+";
  font-family: "Instrument Serif", serif;
  font-size: 18px;
  color: var(--muted);
  line-height: 1;
}
.b-paa details[open] summary::after { content: "−"; }
.b-paa details > div {
  margin-top: 8px;
  font-size: 13px;
  color: var(--ink-2);
  line-height: 1.55;
}

/* Try-this CTA card */
.b-try-input {
  width: 100%;
  border: 1px solid rgba(255,255,255,.18);
  background: rgba(255,255,255,.06);
  color: #fff;
  border-radius: 10px;
  padding: 11px 14px;
  font: inherit;
  font-size: 14px;
  margin-bottom: 10px;
  outline: none;
}
.b-try-input::placeholder { color: rgba(255,255,255,.45); }
.b-try-input:focus { border-color: var(--violet); background: rgba(255,255,255,.10); }
.b-try-btn {
  display: block; width: 100%;
  background: #fff; color: var(--ink);
  border: none; border-radius: 10px;
  padding: 11px 14px; cursor: pointer;
  font: inherit; font-size: 14px;
  text-decoration: none; text-align: center;
  transition: background .15s ease;
}
.b-try-btn:hover { background: var(--paper-2); }

/* Citation generator */
.b-cite-tabs { display: flex; gap: 4px; margin-bottom: 10px; flex-wrap: wrap; }
.b-cite-tab {
  background: var(--paper-2);
  border: 1px solid var(--line);
  color: var(--ink-2);
  border-radius: 999px;
  padding: 5px 12px;
  font-size: 12px;
  cursor: pointer;
  font-family: inherit;
}
.b-cite-tab.is-active {
  background: var(--ink); color: #fff; border-color: var(--ink);
}
.b-cite-text {
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  font-family: "ui-monospace", monospace;
  font-size: 12px;
  line-height: 1.5;
  color: var(--ink);
  word-break: break-word;
  margin-bottom: 8px;
}
.b-cite-copy {
  background: transparent; border: 1px solid var(--line);
  color: var(--ink-2); border-radius: 6px;
  padding: 5px 10px; font-size: 12px;
  cursor: pointer; font-family: inherit;
  transition: background .15s ease;
}
.b-cite-copy:hover { background: var(--paper-2); }
.b-cite-copy.is-copied { background: var(--mint-w); color: #3f7a60; border-color: rgba(92,168,135,.30); }

/* Authority badges */
.b-authority {
  display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px;
}
.b-badge {
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 11.5px;
  color: var(--ink-2);
  display: inline-flex; align-items: center; gap: 5px;
}
.b-badge::before {
  content: ""; width: 5px; height: 5px; border-radius: 50%;
  background: var(--mint);
}

/* Related queries */
.b-related-q { display: flex; flex-wrap: wrap; gap: 6px; }
.b-related-q a {
  background: var(--paper-2);
  border: 1px solid var(--line);
  color: var(--ink-2);
  border-radius: 999px;
  padding: 5px 11px;
  font-size: 12.5px;
  text-decoration: none;
  transition: background .15s ease, border-color .15s ease;
}
.b-related-q a:hover { background: #fff; border-color: var(--indigo); color: var(--indigo); }

/* Heading anchors (for TOC links) */
.b-prose h2 { scroll-margin-top: 90px; }
.b-prose h3 { scroll-margin-top: 90px; }
.b-cites li { scroll-margin-top: 90px; }
.b-faq details { scroll-margin-top: 90px; }
[id] { scroll-margin-top: 90px; }

/* Constrain figures from overflowing the prose column */
.b-prose .b-figure { max-width: 100%; overflow-x: auto; }
.b-prose .b-figure svg { max-width: 100%; height: auto; }
.b-prose .b-figure img { max-width: 100%; height: auto; }
.b-prose pre { max-width: 100%; overflow-x: auto; }
.b-prose .b-math { overflow-x: auto; }

/* Prevent any deep child from blowing out the column */
.b-prose-col { min-width: 0; }
.b-prose { min-width: 0; }
.b-prose img { max-width: 100%; height: auto; }
.b-prose table { width: 100%; max-width: 100%; }

/* Long inline code shouldn't cause horizontal scroll on the page */
.b-prose code { word-break: break-word; }

/* ── Mobile tightening ───────────────────────────────────────── */
@media (max-width: 600px) {
  .b-nav-inner { padding: 12px 0; }
  .b-nav-link { padding: 8px 10px; font-size: 14px; }
  .b-nav-cta { padding: 8px 12px; font-size: 14px; }
  .b-hero { padding: 36px 0 20px; }
  .b-article-hero { padding: 24px 0 8px; }
  .b-article-h1 { letter-spacing: -0.015em; }
  .b-prose { font-size: 16.5px; line-height: 1.7; }
  .b-prose h2 { line-height: 1.18; }
  .b-callout { padding: 18px 20px; }
  .b-callout-title { font-size: 1.2rem; line-height: 1.35; }
  .b-step { padding: 16px; grid-template-columns: 30px 1fr; gap: 12px; }
  .b-step-num { width: 28px; height: 28px; font-size: 15px; }
  .b-cta { padding: 30px 22px; margin-top: 2.4em; }
  .b-side-card { padding: 18px 20px; }
  .b-card-body { padding: 18px; }
  .b-card-title { font-size: 1.4rem; }
  .b-section-h { margin-top: 36px; }
  .b-related { margin-top: 2.4em; }
  /* Prevent horizontal scroll caused by SVG figures */
  .blog-shell { overflow-x: hidden; }
}

/* Prevent the sticky background grid from intercepting clicks */
.blog-shell::before { z-index: -1; }
@supports (-webkit-touch-callout: none) {
  /* iOS sticky requires position: -webkit-sticky on some versions */
  @media (min-width: 1021px) {
    .b-side { position: -webkit-sticky; position: sticky; }
  }
}