.blog-site {
  --blog-bg: var(--paper, #fafaf7);
  --blog-ink: var(--ink, #0a0a0a);
  --blog-muted: var(--muted, #6b6b66);
  --blog-line: var(--border, #0a0a0a);
  --blog-soft: var(--soft, #efede5);
  --blog-accent: var(--accent, #c43d12);
  background: var(--blog-bg);
  color: var(--blog-ink);
  caret-color: var(--blog-accent);
}

.blog-site ::selection {
  color: var(--blog-bg);
  background: var(--blog-accent);
}

.blog-skip-link {
  position: fixed;
  z-index: 1100;
  top: 12px;
  left: 12px;
  padding: .7rem .9rem;
  transform: translateY(-160%);
  border: 1px solid var(--blog-ink);
  background: var(--blog-bg);
  color: var(--blog-ink);
  font-family: var(--font-mono, monospace);
  text-decoration: none;
}

.blog-skip-link:focus { transform: translateY(0); }

.blog-site :focus-visible {
  outline: 2px solid var(--blog-accent);
  outline-offset: 3px;
}

.blog-page {
  min-height: 65vh;
  padding: clamp(1.5rem, 3vw, 2.75rem) 0 clamp(4rem, 8vw, 7rem);
  background: var(--blog-bg);
  color: var(--blog-ink);
}

.blog-container {
  width: min(1120px, calc(100% - 40px));
  margin-inline: auto;
}

.blog-breadcrumbs {
  margin-bottom: clamp(2rem, 5vw, 4rem);
  color: var(--blog-muted);
  font-family: var(--font-mono, monospace);
  font-size: .73rem;
  letter-spacing: .045em;
  text-transform: uppercase;
}

.blog-breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.blog-breadcrumbs li + li::before {
  content: "/";
  margin-right: .5rem;
  color: var(--blog-accent);
}

.blog-breadcrumbs a,
.blog-back-link a {
  color: inherit;
  text-decoration: underline;
  text-decoration-color: var(--blog-accent);
  text-underline-offset: .22em;
}

.blog-index-header {
  max-width: 800px;
  padding-bottom: clamp(2rem, 5vw, 4rem);
}

.blog-index-header h1,
.blog-article-header h1 {
  max-width: 20ch;
  margin: 0;
  color: var(--blog-ink);
  font-family: var(--font-display, 'Geist', system-ui, sans-serif);
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -.025em;
  line-height: 1.04;
  text-wrap: balance;
}

.blog-index-header > p {
  max-width: 62ch;
  margin: 1.2rem 0 0;
  color: var(--blog-muted);
  font-size: clamp(1.1rem, 1rem + .3vw, 1.25rem);
  line-height: 1.65;
}

.blog-index-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 360px), 1fr));
  align-items: stretch;
  gap: 1rem;
}

.blog-index-section-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: .85rem;
  padding-bottom: .8rem;
  border-bottom: 1px solid var(--blog-line);
}

.blog-index-section-heading h2 {
  margin: 0;
  color: var(--blog-ink);
  font-size: 1.2rem;
  font-weight: 800;
}

.blog-index-section-heading > span {
  color: var(--blog-muted);
  font-family: var(--font-mono, monospace);
  font-size: .68rem;
  letter-spacing: .045em;
  text-transform: uppercase;
}

.blog-index-entry {
  display: flex;
  min-width: 0;
  flex-direction: column;
  padding: clamp(1.2rem, 2.6vw, 1.8rem);
  border: 1px solid var(--blog-line);
  background: var(--blog-bg);
  box-shadow: 0 4px 0 var(--blog-soft);
}

.blog-entry-topline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .55rem .9rem;
  margin-bottom: 1.1rem;
}

.blog-entry-category {
  color: var(--blog-accent);
  font-family: var(--font-mono, monospace);
  font-size: .69rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.blog-card-date {
  padding: .35rem .55rem;
  border: 1px solid var(--blog-line);
  background: var(--blog-soft);
  color: var(--blog-ink);
  font-family: var(--font-mono, monospace);
  font-size: .67rem;
  font-weight: 700;
  letter-spacing: .025em;
  white-space: nowrap;
}

.blog-index-entry h2 {
  max-width: 27ch;
  margin: 0;
  color: var(--blog-ink);
  font-size: clamp(1.65rem, 2.8vw, 2.3rem);
  font-weight: 800;
  line-height: 1.16;
  text-wrap: balance;
}

.blog-index-entry h2 a {
  color: inherit;
  text-decoration-color: transparent;
  text-decoration-thickness: 2px;
  text-underline-offset: .12em;
  transition: text-decoration-color .16s ease;
}

.blog-index-entry h2 a:hover { text-decoration-color: var(--blog-accent); }

.blog-index-entry > p {
  max-width: 68ch;
  margin: .85rem 0 0;
  color: var(--blog-muted);
  font-size: 1.05rem;
  line-height: 1.65;
}

.blog-article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .45rem .75rem;
  margin: 1.1rem 0 0;
  padding: 0;
  color: var(--blog-muted);
  font-family: var(--font-mono, monospace);
  font-size: .72rem;
  letter-spacing: .035em;
  list-style: none;
  text-transform: uppercase;
}

.blog-entry-reading-time {
  margin-top: auto;
  padding-top: 1.25rem;
  color: var(--blog-muted);
  font-family: var(--font-mono, monospace);
  font-size: .7rem;
  letter-spacing: .04em;
  text-transform: uppercase;
}

.blog-read-link,
.blog-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .65rem;
  min-height: 48px;
  margin-top: 1.2rem;
  padding: .7rem 1rem;
  border: 1px solid var(--blog-ink);
  background: var(--blog-ink);
  color: var(--blog-bg);
  font-family: var(--font-mono, monospace);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .045em;
  text-decoration: none;
  text-transform: uppercase;
  cursor: pointer;
  transition: color .16s ease, background-color .16s ease, border-color .16s ease;
}

.blog-index-entry .blog-read-link {
  align-self: flex-start;
  margin-top: .55rem;
}

.blog-read-link svg,
.blog-button svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: square;
  stroke-linejoin: miter;
  stroke-width: 1.6;
}

.blog-read-link:hover,
.blog-button:hover {
  border-color: var(--blog-accent);
  background: var(--blog-accent);
  color: var(--blog-bg);
}

.blog-index-cta {
  display: grid;
  justify-items: start;
  max-width: 900px;
  margin-top: clamp(3rem, 7vw, 5.5rem);
  padding: clamp(1.4rem, 3vw, 2.25rem) 0 0;
  border-top: 2px solid var(--blog-ink);
}

.blog-index-cta h2 {
  margin: 0;
  color: var(--blog-ink);
  font-size: clamp(1.5rem, 2vw, 1.9rem);
  font-weight: 800;
}

.blog-index-cta p {
  max-width: 60ch;
  margin: .55rem 0 0;
  color: var(--blog-muted);
  line-height: 1.65;
}

.blog-empty { padding: 1.5rem 0; color: var(--blog-muted); }

.blog-article-header {
  max-width: 920px;
  margin-bottom: clamp(2rem, 5vw, 3.8rem);
}

.blog-article-header h1 {
  max-width: 22ch;
  font-size: clamp(2.3rem, 4.5vw, 4.1rem);
}

.blog-article-deck {
  max-width: 68ch;
  margin: 1.3rem 0 0;
  color: var(--blog-muted);
  font-size: clamp(1.12rem, 1rem + .35vw, 1.35rem);
  line-height: 1.65;
}

.blog-article-meta { gap: .55rem 1.1rem; }

.blog-grade-note {
  max-width: 75ch;
  margin: 1.4rem 0 0;
  padding: .95rem 1rem;
  border-block: 1px solid var(--blog-line);
  background: var(--blog-soft);
  color: var(--blog-ink);
  font-size: .95rem;
  line-height: 1.6;
}

.blog-method-map {
  max-width: 1080px;
  margin: 0 0 clamp(2.5rem, 5vw, 4rem);
  border-block: 1px solid var(--blog-line);
}

.blog-method-map ol {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.blog-method-map li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: .75rem;
  min-height: 86px;
  padding: 1.1rem 1rem 1.1rem 0;
}

.blog-method-map li + li { padding-left: 1rem; border-left: 1px solid var(--blog-line); }

.blog-stage-number {
  color: var(--blog-accent);
  font-family: var(--font-mono, monospace);
  font-size: .72rem;
  font-weight: 700;
  line-height: 1.65;
}

.blog-method-map strong,
.blog-method-map small { display: block; }

.blog-method-map strong { font-size: .98rem; font-weight: 800; line-height: 1.35; }

.blog-method-map small {
  margin-top: .18rem;
  color: var(--blog-muted);
  font-size: .82rem;
  line-height: 1.4;
}

.blog-article-layout {
  display: grid;
  grid-template-columns: minmax(170px, 210px) minmax(0, 720px);
  align-items: start;
  gap: clamp(2.5rem, 7vw, 6rem);
  max-width: 1080px;
}

.blog-toc {
  position: sticky;
  top: 100px;
  padding-top: .25rem;
}

.blog-toc-title {
  margin: 0 0 .8rem;
  color: var(--blog-ink);
  font-family: var(--font-mono, monospace);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.blog-toc ol {
  display: grid;
  gap: .42rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.blog-toc a {
  color: var(--blog-muted);
  font-size: .86rem;
  line-height: 1.4;
  text-decoration-color: transparent;
  text-underline-offset: .2em;
}

.blog-toc a:hover { color: var(--blog-ink); text-decoration-color: var(--blog-accent); }

.blog-reading-content {
  min-width: 0;
  max-width: 720px;
  color: var(--blog-ink);
  font-size: clamp(1.05rem, 1rem + .12vw, 1.15rem);
  line-height: 1.76;
}

.blog-reading-content > p,
.blog-reading-content section > p { margin: 0 0 1.25rem; }

.blog-reading-content p { text-wrap: pretty; }

.blog-reading-content a:not(.blog-button) {
  color: var(--blog-ink);
  text-decoration-color: var(--blog-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: .2em;
}

.blog-reading-content a:not(.blog-button):hover { text-decoration-thickness: 2px; }

.blog-lead {
  font-size: clamp(1.18rem, 1.05rem + .35vw, 1.4rem);
  line-height: 1.62;
}

.blog-key-point {
  margin: 2rem 0 2.5rem;
  padding: 1.05rem 1.1rem;
  border-block: 1px solid var(--blog-line);
  background: var(--blog-soft);
  font-size: 1rem;
  line-height: 1.65;
}

.blog-key-point strong { display: block; margin-bottom: .2rem; }

.blog-section { scroll-margin-top: 100px; margin-top: clamp(2.6rem, 6vw, 4.5rem); }

.blog-section h2,
.blog-article-close h2 {
  margin: 0 0 1rem;
  color: var(--blog-ink);
  font-family: var(--font-display, 'Geist', system-ui, sans-serif);
  font-size: clamp(1.55rem, 2.4vw, 2rem);
  font-weight: 800;
  letter-spacing: -.015em;
  line-height: 1.2;
  text-wrap: balance;
}

.blog-check-list,
.blog-example-details ol {
  display: grid;
  gap: .65rem;
  margin: 1rem 0 1.4rem;
  padding-left: 1.25rem;
}

.blog-check-list li,
.blog-example-details li { padding-left: .2rem; }

.blog-example-details {
  margin-top: 1.3rem;
  border-block: 1px solid var(--blog-line);
}

.blog-example-details summary {
  padding: 1rem 0;
  color: var(--blog-ink);
  font-weight: 800;
  cursor: pointer;
}

.blog-example-details summary::marker { color: var(--blog-accent); }

.blog-example-details[open] { padding-bottom: .5rem; }

.blog-example-details > :not(summary) { margin-inline: .15rem; }

.blog-example-details > p { font-size: 1rem; }

.blog-table-wrap {
  max-width: 100%;
  overflow-x: auto;
  border-block: 1px solid var(--blog-line);
  scrollbar-color: var(--blog-muted) var(--blog-soft);
  scrollbar-width: thin;
}

.blog-table {
  width: 100%;
  min-width: 660px;
  border-collapse: collapse;
  color: var(--blog-ink);
  font-size: .94rem;
  line-height: 1.55;
}

.blog-table caption {
  padding: .75rem 0;
  color: var(--blog-muted);
  font-size: .85rem;
  text-align: left;
}

.blog-table th,
.blog-table td {
  padding: .8rem .85rem;
  border-top: 1px solid var(--blog-line);
  text-align: left;
  vertical-align: top;
}

.blog-table th {
  color: var(--blog-ink);
  font-family: var(--font-mono, monospace);
  font-size: .68rem;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.blog-table td:first-child { font-weight: 700; }

.blog-table-hint {
  margin: .55rem 0 0 !important;
  color: var(--blog-muted);
  font-size: .82rem;
}

.blog-planner-section > p { margin-bottom: 1.4rem !important; }

.blog-planner {
  padding: clamp(1rem, 2.5vw, 1.5rem);
  border: 1px solid var(--blog-ink);
  background: var(--blog-bg);
}

.blog-planner-note {
  margin: 0 0 1.2rem !important;
  color: var(--blog-muted);
  font-size: .88rem;
}

.blog-planner-fields {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.blog-planner-fields label {
  display: grid;
  align-content: start;
  gap: .4rem;
  color: var(--blog-ink);
  font-size: .88rem;
  font-weight: 700;
  line-height: 1.35;
}

.blog-planner-fields input,
.blog-planner-fields textarea {
  width: 100%;
  min-height: 46px;
  padding: .65rem .7rem;
  border: 1px solid var(--blog-line);
  border-radius: 0;
  background: var(--blog-bg);
  color: var(--blog-ink);
  font: 400 .95rem/1.45 var(--font-ui, 'Geist', system-ui, sans-serif);
}

.blog-planner-fields textarea { min-height: 96px; resize: vertical; }
.blog-planner-fields input::placeholder,
.blog-planner-fields textarea::placeholder { color: var(--blog-muted); opacity: 1; }

.blog-planner-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem 1rem;
  margin-top: 1rem;
}

.blog-planner-actions .blog-button { margin-top: 0; }

.blog-clear-button {
  min-height: 44px;
  padding: .6rem .2rem;
  border: 0;
  background: transparent;
  color: var(--blog-ink);
  font: 700 .8rem var(--font-mono, monospace);
  text-decoration: underline;
  text-decoration-color: var(--blog-accent);
  text-underline-offset: .22em;
  cursor: pointer;
}

.blog-planner-status {
  min-height: 1.4em;
  margin: .8rem 0 0 !important;
  color: var(--blog-muted);
  font-size: .85rem;
}

.blog-plan-preview {
  margin-top: 1.3rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--blog-line);
}

.blog-plan-preview h3 {
  margin: 0 0 .9rem;
  color: var(--blog-ink);
  font-size: 1.15rem;
  font-weight: 800;
}

.blog-plan-preview dl { margin: 0; }

.blog-plan-preview dl > div {
  display: grid;
  grid-template-columns: minmax(150px, .75fr) minmax(0, 1.25fr);
  gap: .8rem;
  padding: .65rem 0;
  border-top: 1px solid var(--blog-line);
}

.blog-plan-preview dt {
  color: var(--blog-muted);
  font-family: var(--font-mono, monospace);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .035em;
  text-transform: uppercase;
}

.blog-plan-preview dd { margin: 0; overflow-wrap: anywhere; }

.blog-article-close {
  margin-top: clamp(3rem, 7vw, 5rem);
  padding-top: 1.4rem;
  border-top: 2px solid var(--blog-ink);
}

.blog-article-close h2 { margin-bottom: .7rem; }
.blog-article-close > p { margin: 0; }
.blog-back-link { margin: 2rem 0 0 !important; font-size: .92rem; }


.blog-article-header h1 { max-width: 30ch; }

.blog-benefit-list { padding-left: 1.2rem; }
.blog-benefit-list li + li { margin-top: .7rem; }

.blog-research-charts { display: grid; gap: 1rem; }
.blog-research-chart { margin: 1.1rem 0 1.4rem; padding-inline: .85rem; border-block: 1px solid var(--blog-line); }
.blog-research-chart > summary {
  position: relative;
  padding: .95rem 1.75rem .95rem 0;
  color: var(--blog-ink);
  font-weight: 750;
  line-height: 1.4;
  cursor: pointer;
}
.blog-research-chart > summary::marker { color: var(--blog-accent); }
.blog-research-chart[open] > summary { padding-bottom: .45rem; }
.blog-evidence-figure { margin: .55rem 0 0; }
.blog-evidence-chart { display: block; width: 100%; max-width: 560px; height: auto; margin-inline: auto; overflow: visible; }
.blog-chart-grid { stroke: var(--blog-line); stroke-width: 1; opacity: .22; }
.blog-chart-axis { stroke: var(--blog-ink); stroke-width: 1.5; }
.blog-chart-bar-primary { fill: var(--blog-accent); }
.blog-chart-bar-muted { fill: var(--blog-ink); opacity: .55; }
.blog-chart-range { stroke: var(--blog-accent); stroke-width: 8; stroke-linecap: square; }
.blog-chart-range-muted { stroke: var(--blog-ink); opacity: .6; }
.blog-chart-range-cap { fill: var(--blog-accent); }
.blog-chart-range-cap-muted { fill: var(--blog-ink); opacity: .7; }
.blog-chart-label,
.blog-chart-value,
.blog-chart-note { fill: var(--blog-ink); font-family: var(--font-mono, monospace); font-size: 16px; }
.blog-chart-value { font-weight: 800; }
.blog-chart-note { fill: var(--blog-muted); font-size: 14px; }
.blog-evidence-figure figcaption { max-width: 62ch; margin: .55rem auto 0; color: var(--blog-muted); font-size: .88rem; line-height: 1.55; }
.blog-study-context { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .8rem 1.2rem; margin: 1rem 0 0; padding: .9rem 0 0; border-top: 1px solid var(--blog-line); }
.blog-study-context > div { min-width: 0; }
.blog-study-context dt { color: var(--blog-muted); font: 700 .68rem/1.4 var(--font-mono, monospace); letter-spacing: .05em; text-transform: uppercase; }
.blog-study-context dd { margin: .3rem 0 0; font-size: .82rem; line-height: 1.5; }
.blog-chart-limit { margin: .8rem 0 1.1rem !important; color: var(--blog-muted); font-size: .84rem !important; }

.blog-error-choice {
  width: 100%;
  min-height: 44px;
  padding: .35rem 0;
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  font-weight: 700;
  line-height: inherit;
  text-align: left;
  text-decoration: underline;
  text-decoration-color: var(--blog-accent);
  text-decoration-style: dotted;
  text-underline-offset: .18em;
  cursor: pointer;
}
.blog-error-choice:hover,
.blog-error-choice[aria-pressed="true"] { text-decoration-style: solid; }
.blog-error-choice:focus-visible { outline: 2px solid var(--blog-accent); outline-offset: 3px; }
.blog-table tr.is-selected td { background: var(--blog-soft); }
.blog-error-guidance { margin-top: 1rem; padding: .9rem 1rem; border-block: 1px solid var(--blog-accent); background: var(--blog-soft); }
.blog-error-guidance p { margin: 0; font-size: .9rem; }
.blog-error-guidance p + p { margin-top: .45rem; }
.blog-error-guidance-label { color: var(--blog-muted); font: 700 .7rem/1.4 var(--font-mono, monospace) !important; letter-spacing: .06em; text-transform: uppercase; }

.blog-practice-example {
  margin: 1.45rem 0 1.9rem;
  padding: 1rem 1.1rem;
  border-left: 1px solid var(--blog-ink);
  background: var(--blog-soft);
}
.blog-practice-example p { margin: 0; font-size: .97rem; line-height: 1.6; }
.blog-practice-example p + p { margin-top: .45rem; }
.blog-example-label {
  color: var(--blog-muted);
  font: 700 .68rem/1.45 var(--font-mono, monospace) !important;
  letter-spacing: .06em;
  text-transform: uppercase;
}
.blog-demo-record { padding: clamp(1rem, 2.5vw, 1.5rem); border: 1px solid var(--blog-ink); }
.blog-demo-section { margin-top: 2rem; padding-top: 1.25rem; border-top: 1px solid var(--blog-line); }
.blog-demo-section h3 { margin: 0 0 .85rem; color: var(--blog-ink); font-family: var(--font-display, 'Geist', system-ui, sans-serif); font-size: clamp(1.25rem, 1.8vw, 1.55rem); font-weight: 800; line-height: 1.25; text-wrap: balance; }
.blog-demo-figure { margin: 0; overflow-x: auto; }
.blog-demo-chart { display: block; width: 100%; min-width: 320px; max-width: 600px; height: auto; margin-inline: auto; }
.blog-demo-figure figcaption { margin: .45rem auto 0; color: var(--blog-muted); font-size: .82rem; line-height: 1.5; }
.blog-demo-explanation { display: grid; gap: .2rem; margin-top: 1.2rem; padding-top: .9rem; border-top: 1px solid var(--blog-line); }
.blog-demo-explanation p { margin: 0; font-size: .9rem; line-height: 1.6; }

.blog-study-notes details { border-block: 1px solid var(--blog-line); }
.blog-study-notes summary { padding: .85rem 0; font-weight: 750; cursor: pointer; }
.blog-study-notes ol { padding: 0; list-style: none; }
.blog-study-notes li { padding: .7rem 0 .7rem 1.35rem; font-size: .88rem; line-height: 1.55; text-indent: -1.35rem; overflow-wrap: anywhere; }
.blog-study-notes li + li { border-top: 1px solid var(--blog-line); }

.blog-visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.igcse-case-table { min-width: 900px; }
.igcse-research-table { min-width: 1120px; }
.igcse-case-table th:nth-child(1) { width: 31%; }
.igcse-case-table th:nth-child(2) { width: 27%; }
.igcse-case-table th:nth-child(3) { width: 42%; }
.igcse-research-table th:nth-child(1) { width: 24%; }
.igcse-research-table th:nth-child(2) { width: 27%; }
.igcse-research-table th:nth-child(3) { width: 24%; }
.igcse-research-table th:nth-child(4) { width: 25%; }
.igcse-case-table td,
.igcse-research-table td { font-weight: 400 !important; }
.igcse-case-table td strong,
.igcse-research-table td:first-child { font-weight: 800 !important; }

.igcse-trial-figure,
.igcse-personal-figure {
  margin: 1.4rem 0 1.8rem;
  padding: 1rem 0 1.1rem;
  border-block: 1px solid var(--blog-line);
}

.igcse-chart-title {
  margin: 0 !important;
  color: var(--blog-ink);
  font-size: 1.12rem;
  font-weight: 800;
  line-height: 1.35;
}

.igcse-chart-subtitle {
  margin: .25rem 0 1rem !important;
  color: var(--blog-muted);
  font-size: .88rem;
  line-height: 1.5;
}

.igcse-chart-axis,
.igcse-personal-axis {
  display: grid;
  grid-template-columns: minmax(135px, 1.15fr) minmax(0, 4fr) minmax(54px, .42fr);
  align-items: end;
  gap: .65rem;
  margin-bottom: .25rem;
  color: var(--blog-muted);
  font: 700 .66rem/1.3 var(--font-mono, monospace);
}

.igcse-axis-scale {
  display: flex;
  justify-content: space-between;
  gap: .2rem;
}

.igcse-trial-bars,
.igcse-personal-bars {
  display: grid;
  gap: .75rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.igcse-trial-row,
.igcse-personal-bars li {
  display: grid;
  grid-template-columns: minmax(135px, 1.15fr) minmax(0, 4fr) minmax(54px, .42fr);
  align-items: center;
  gap: .65rem;
  color: var(--blog-ink);
  font-size: .86rem;
  line-height: 1.4;
}

.igcse-trial-row > strong,
.igcse-personal-bars output {
  color: var(--blog-ink);
  font: 800 .78rem/1.3 var(--font-mono, monospace);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.igcse-chart-track {
  position: relative;
  height: 25px;
  overflow: hidden;
  border: 1px solid var(--blog-line);
  background-color: var(--blog-bg);
  background-image: linear-gradient(to right, transparent calc(25% - .5px), var(--blog-line) 25%, transparent calc(25% + .5px), transparent calc(50% - .5px), var(--blog-line) 50%, transparent calc(50% + .5px), transparent calc(75% - .5px), var(--blog-line) 75%, transparent calc(75% + .5px));
}

.igcse-chart-fill {
  display: block;
  width: 100%;
  height: 100%;
  border-right: 1px solid var(--blog-ink);
  background: var(--blog-accent);
  transform: scaleX(var(--chart-ratio, 0));
  transform-origin: left center;
  transition: transform .22s ease-out;
}

.igcse-chart-fill-muted { background: var(--blog-ink); }
.igcse-trial-figure figcaption,
.igcse-personal-figure figcaption { max-width: 70ch; margin: .9rem 0 0; color: var(--blog-muted); font-size: .86rem; line-height: 1.58; }

.igcse-tracker { margin-top: 1.2rem; }
.igcse-tracker-note { margin: 0 0 .9rem !important; color: var(--blog-muted); font-size: .86rem; }
.igcse-tracker-skill { max-width: 570px; margin-bottom: 1.1rem; }
.igcse-tracker-skill label { display: grid; gap: .4rem; font-size: .9rem; font-weight: 750; line-height: 1.4; }
.igcse-tracker-skill input,
.igcse-tracker-table input {
  min-height: 42px;
  padding: .55rem .6rem;
  border: 1px solid var(--blog-line);
  border-radius: 0;
  background: var(--blog-bg);
  color: var(--blog-ink);
  font: 500 .95rem/1.35 var(--font-ui, 'Geist', system-ui, sans-serif);
  font-variant-numeric: tabular-nums;
}
.igcse-tracker-table { min-width: 560px; }
.igcse-tracker-table th:first-child { min-width: 190px; }
.igcse-tracker-table th:not(:first-child) { width: 150px; }
.igcse-tracker-table td { vertical-align: middle; }
.igcse-tracker-table input { width: 100%; max-width: 120px; }
.igcse-tracker-table input:invalid { border-color: var(--blog-accent); }
.igcse-personal-figure { margin-block: 1.5rem 1rem; }
.igcse-personal-chart { min-width: 0; }
.igcse-personal-bars li { min-height: 31px; }
.igcse-personal-bars output { font-size: .72rem; }
.igcse-tracker .blog-planner-actions { margin-top: .2rem; }
.igcse-tracker .blog-planner-actions .blog-button { min-height: 44px; }
.igcse-reference-list { counter-reset: reference; padding: 0 !important; list-style: none !important; }
.igcse-reference-list li { position: relative; padding: .8rem 0 .8rem 2.4rem !important; text-indent: 0 !important; }
.igcse-reference-list li::before {
  position: absolute;
  top: .82rem;
  left: 0;
  counter-increment: reference;
  content: "[" counter(reference) "]";
  color: var(--blog-accent);
  font: 800 .72rem/1.45 var(--font-mono, monospace);
}
.igcse-loop-list { display: grid; gap: .7rem; margin: 1rem 0 1.4rem; padding-left: 1.35rem; }
.igcse-loop-list li { padding-left: .2rem; }
.igcse-loop-list strong { color: var(--blog-accent); }

@media print {
  body.blog-print-planner > :not(main) { display: none !important; }
  body.blog-print-planner main.blog-page { min-height: 0; padding: 0; }
  body.blog-print-planner .blog-container { width: 100%; margin: 0; }
  body.blog-print-planner .blog-container > :not(.blog-article-layout) { display: none !important; }
  body.blog-print-planner .blog-article-layout { display: block !important; }
  body.blog-print-planner .blog-article-layout > :not(.blog-reading-content) { display: none !important; }
  body.blog-print-planner .blog-reading-content > :not(#session-planner) { display: none !important; }
  body.blog-print-planner #session-planner { display: block !important; margin: 0; padding: 0; }
  body.blog-print-planner #session-planner [hidden],
  body.blog-print-planner #session-planner .blog-planner-actions { display: none !important; }
  body.blog-print-planner #session-planner .blog-planner { padding: 0; border: 0; }
  body.blog-print-planner #session-planner .blog-planner-fields { display: grid !important; grid-template-columns: 1fr 1fr; }
  body.blog-print-planner #session-planner .blog-planner-fields label { display: grid !important; }
  body.blog-print-planner #session-planner input,
  body.blog-print-planner #session-planner textarea { display: block !important; border: 0; border-bottom: 1px solid #222; border-radius: 0; resize: none; }
  body.blog-print-planner #session-planner .blog-planner-note { color: #222; }
}

@media (max-width: 900px) {
  .blog-article-layout { grid-template-columns: minmax(0, 720px); gap: 0; }
  .blog-toc { position: static; margin-bottom: 2.2rem; padding: .9rem 0; border-block: 1px solid var(--blog-line); }
  .blog-toc-title { margin-bottom: .5rem; }
  .blog-toc ol { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .35rem 1rem; }
}

@media (max-width: 680px) {
  .blog-container { width: min(100% - 32px, 720px); }
  .blog-page { padding-top: 1.25rem; }
  .blog-breadcrumbs { margin-bottom: 2.2rem; font-size: .68rem; }
  .blog-index-header h1,
  .blog-article-header h1 { font-size: clamp(2.15rem, 10vw, 3.3rem); }
  .blog-method-map ol { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .blog-method-map li { min-height: 78px; padding: .9rem .55rem .9rem 0; }
  .blog-method-map li + li { padding-left: .65rem; }
  .blog-method-map li:nth-child(3) { padding-left: 0; border-left: 0; border-top: 1px solid var(--blog-line); }
  .blog-method-map li:nth-child(4) { border-top: 1px solid var(--blog-line); }
  .blog-toc ol { grid-template-columns: minmax(0, 1fr); }
  .blog-reading-content { font-size: 1.04rem; line-height: 1.72; }
  .blog-planner-fields { grid-template-columns: minmax(0, 1fr); }
  .blog-study-context { grid-template-columns: minmax(0, 1fr); gap: .7rem; }
  .blog-evidence-figure,
  .blog-demo-figure { overflow-x: auto; }
  .blog-evidence-chart { min-width: 490px; }
  .blog-demo-chart { min-width: 525px; }
  .blog-plan-preview dl > div { grid-template-columns: minmax(0, 1fr); gap: .2rem; }
  .igcse-chart-axis,
  .igcse-personal-axis,
  .igcse-trial-row,
  .igcse-personal-bars li { grid-template-columns: minmax(88px, 1.15fr) minmax(75px, 4fr) minmax(46px, .55fr); gap: .4rem; }
  .igcse-trial-row,
  .igcse-personal-bars li { font-size: .76rem; }
  .igcse-trial-row > strong,
  .igcse-personal-bars output { font-size: .68rem; }
  .igcse-chart-track { height: 22px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .blog-index-entry h2 a,
  .blog-read-link,
  .blog-button,
  .igcse-chart-fill { transition: none; }
}