.article { max-width: 760px; margin: 0 auto; padding: 48px 24px 96px; }
.article header.hero { margin-bottom: 40px; }
.kicker { font-size: 12.5px; font-weight: 650; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); margin: 0 0 14px; }
.article h1 { font-size: clamp(32px, 4.6vw, 46px); line-height: 1.08; letter-spacing: -0.03em; margin: 0 0 16px; font-weight: 720; }
.dek { font-size: 19px; line-height: 1.5; color: var(--text-2); margin: 0 0 20px; }
.byline { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 14px; font-size: 13.5px; color: var(--muted); }
.byline .sep { opacity: 0.5; }
.cta-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }

.article h2 { font-size: 26px; line-height: 1.2; letter-spacing: -0.02em; margin: 56px 0 14px; font-weight: 680; scroll-margin-top: 80px; }
.article h3 { font-size: 18px; line-height: 1.3; letter-spacing: -0.01em; margin: 32px 0 10px; font-weight: 650; scroll-margin-top: 80px; }
.article p, .article li { font-size: 16.5px; line-height: 1.7; color: var(--text); }
.article p { margin: 0 0 16px; }
.article ul, .article ol { padding-left: 22px; margin: 0 0 18px; }
.article li { margin: 0 0 8px; }
.article li::marker { color: var(--muted); }
.article :not(pre) > code { font-size: 0.86em; background: var(--code-bg); border: 1px solid var(--border); padding: 1px 5px; border-radius: 5px; }
.article strong { font-weight: 640; }

.takeaways { border: 1px solid var(--border); background: var(--surface); border-radius: 14px; padding: 22px 24px 8px; box-shadow: var(--shadow); }
.takeaways h2 { margin: 0 0 12px; font-size: 15px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); font-weight: 650; }
.takeaways ol { padding-left: 20px; }
.takeaways li { font-size: 16px; }

.toc { margin: 28px 0 0; padding: 16px 20px; border-left: 2px solid var(--border); font-size: 14px; }
.toc b { display: block; font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); margin-bottom: 6px; }
.toc ol { margin: 0; padding-left: 18px; columns: 2; column-gap: 28px; }
.toc li { font-size: 14px; margin: 0 0 4px; line-height: 1.45; break-inside: avoid; }
.toc a { color: var(--text-2); text-decoration: none; }
.toc a:hover { color: var(--text); text-decoration: underline; }

/* Callouts */
.note { border-radius: 12px; padding: 14px 18px; margin: 20px 0; border: 1px solid var(--border); background: var(--surface-2); }
.note p:last-child { margin-bottom: 0; }
.note.interpret { border-left: 3px solid var(--warn); }
.note.measured { border-left: 3px solid var(--shared); }
.note .tag { display: block; font-size: 11.5px; letter-spacing: 0.08em; text-transform: uppercase; font-weight: 700; color: var(--muted); margin-bottom: 6px; }

/* Tables */
.table-wrap { overflow-x: auto; margin: 18px 0 8px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { padding: 9px 12px; text-align: left; border-bottom: 1px solid var(--border); vertical-align: top; }
th { font-size: 12px; font-weight: 650; color: var(--muted); text-transform: uppercase; letter-spacing: 0.04em; background: var(--surface-2); white-space: nowrap; }
tr:last-child td { border-bottom: 0; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
td code { white-space: nowrap; }
.article .caption { font-size: 13.5px; color: var(--muted); margin: 8px 2px 24px; line-height: 1.55; }
.article .caption b { color: var(--text-2); }

.table-wrap.wide { margin-left: -60px; margin-right: -60px; }
.table-wrap.wide td:first-child { white-space: nowrap; }

/* Figures */
figure { margin: 28px -60px; }
figure .frame { border: 1px solid var(--border); background: var(--surface); border-radius: 14px; padding: 20px; box-shadow: var(--shadow); }
figure .fig-title { font-weight: 650; font-size: 15px; margin: 0 0 4px; }
figure .fig-sub { font-size: 13.5px; color: var(--muted); margin: 0 0 14px; }
figcaption { font-size: 13.5px; color: var(--muted); margin: 10px 4px 0; line-height: 1.55; }
figcaption b { color: var(--text-2); }
svg text { font-family: var(--font); }
.chart { position: relative; }
.chart svg { display: block; width: 100%; height: auto; overflow: visible; }
.chart .grid { stroke: var(--border); stroke-width: 1; }
.chart .axis { fill: var(--muted); font-size: 11.5px; }
.chart .label { fill: var(--text); font-size: 12.5px; }
.chart .value { fill: var(--text-2); font-size: 12px; font-variant-numeric: tabular-nums; }
.chart .hit { fill: transparent; cursor: default; }
.tip {
  position: absolute; z-index: 5; pointer-events: none;
  background: var(--text); color: var(--bg); font-size: 12.5px; line-height: 1.45;
  padding: 7px 10px; border-radius: 8px; max-width: 280px;
  box-shadow: 0 8px 24px rgba(0,0,0,.2);
  opacity: 0; transform: translateY(4px); transition: opacity 120ms var(--ease-out), transform 120ms var(--ease-out);
}
.tip.show { opacity: 1; transform: none; }
.legend { display: flex; flex-wrap: wrap; gap: 6px 16px; font-size: 13px; color: var(--text-2); margin: 0 0 10px; }
.legend span { display: inline-flex; align-items: center; gap: 6px; }

/* Diagram */
.tokens { display: grid; gap: 10px; font: 12.5px/1 var(--mono); }
.tok-row { display: grid; grid-template-columns: 86px 1fr; gap: 10px; align-items: center; }
.tok-row .who { font: 600 12px var(--font); color: var(--muted); }
.tok-line { display: flex; flex-wrap: wrap; gap: 3px; }
.tok-line span { padding: 5px 7px; border-radius: 5px; background: var(--surface-2); color: var(--text-2); white-space: nowrap; }
.tok-line .c { background: var(--shared-soft); color: var(--text); box-shadow: inset 0 -2px 0 var(--shared); }
.tok-line .x { background: var(--uncached-soft); color: var(--text); box-shadow: inset 0 -2px 0 var(--uncached); }
.tok-line .s { background: var(--session-soft); color: var(--text); box-shadow: inset 0 -2px 0 var(--session); }
.diagram-legend { display: flex; flex-wrap: wrap; gap: 6px 16px; margin-top: 14px; font-size: 13px; color: var(--text-2); }
.diagram-legend span { display: inline-flex; align-items: center; gap: 6px; }

.layout-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.layout-col h4 { margin: 0 0 8px; font-size: 13px; font-weight: 650; display: flex; align-items: center; gap: 8px; }
.stack { display: grid; gap: 4px; }
.stack div { border-radius: 7px; padding: 8px 10px; font-size: 13px; display: flex; justify-content: space-between; gap: 8px; }
.stack .c { background: var(--shared-soft); box-shadow: inset 3px 0 0 var(--shared); }
.stack .x { background: var(--uncached-soft); box-shadow: inset 3px 0 0 var(--uncached); }
.stack .s { background: var(--session-soft); box-shadow: inset 3px 0 0 var(--session); }
.stack small { color: var(--muted); font-family: var(--mono); font-size: 11.5px; white-space: nowrap; }

pre {
  margin: 16px 0 20px; padding: 16px 18px; overflow-x: auto;
  background: var(--code-bg); border: 1px solid var(--border); border-radius: 12px;
  font-size: 13px; line-height: 1.6;
}
pre .cm { color: var(--muted); }
pre .hl-bad { background: var(--uncached-soft); border-radius: 3px; }
pre .hl-good { background: var(--shared-soft); border-radius: 3px; }

.mistake { border: 1px solid var(--border); border-radius: 14px; padding: 18px 20px 6px; margin: 18px 0; background: var(--surface); }
.mistake h3 { margin: 0 0 8px; display: flex; align-items: baseline; gap: 10px; font-size: 17px; }
.mistake h3 .n { font: 600 12px var(--mono); color: var(--muted); }
.mistake .try { font-size: 14px; }
.ba { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 6px 0 14px; }
.ba pre { margin: 0; font-size: 12px; }
.ba .lbl { font-size: 11.5px; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; margin: 0 0 6px; }
.ba .bad .lbl { color: var(--uncached); }
.ba .good .lbl { color: var(--shared); }

.sources li { font-size: 14.5px; }
footer.end { margin-top: 64px; padding-top: 24px; border-top: 1px solid var(--border); font-size: 14px; color: var(--muted); }

@media (max-width: 900px) {
  figure { margin: 24px 0; }
  .table-wrap.wide { margin-left: 0; margin-right: 0; }
}
@media (max-width: 640px) {
  .article { padding: 32px 16px 72px; }
  .toc ol { columns: 1; }
  .layout-pair, .ba { grid-template-columns: 1fr; }
  .tok-row { grid-template-columns: 1fr; gap: 6px; }
  figure .frame { padding: 14px; }
}