/* ═══════════════════════════════════════════════════════════
   AGENT MEMORY LAB — S12
   The 2026 map of agent memory: MEMORY.md, frameworks, vector
   DBs, and the hybrids in between. Four hand-coded SVG charts,
   one decision matrix, one editorial wrapper.
   ═══════════════════════════════════════════════════════════ */

.am-main { background: var(--paper); color: var(--ink); }

/* ── Attribution banner ───────────────────────────────────── */
.am-attr-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 48px;
  background: var(--ink);
  color: var(--paper);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  position: sticky;
  top: 0;
  z-index: 40;
}
.am-attr-banner strong { color: var(--accent); font-weight: 500; }
.am-attr-tag {
  display: inline-block;
  padding: 3px 8px;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-size: 9px;
  letter-spacing: 0.16em;
  flex-shrink: 0;
}
.am-attr-right { opacity: 0.7; flex-shrink: 0; }
@media (max-width: 720px) {
  .am-attr-banner { flex-wrap: wrap; padding: 10px 20px; gap: 6px; }
  .am-attr-right { width: 100%; opacity: 0.5; }
}

/* ── Hero ─────────────────────────────────────────────────── */
.am-hero {
  padding: 120px 56px 60px 88px;
  max-width: 1280px;
  margin: 0 auto;
}
.am-title { margin-top: 22px; }
.am-kicker {
  margin-top: 24px;
  max-width: 720px;
  font-size: 17px;
  line-height: 1.55;
  color: var(--ink-soft);
}
.am-dateline {
  margin-top: 56px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  max-width: 900px;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.am-dateline .label { color: var(--ink-dim); }
.am-dateline .value {
  color: var(--ink);
  margin-top: 4px;
  text-transform: none;
  letter-spacing: 0.04em;
  font-size: 12px;
}
.am-inline-nav {
  margin-top: 28px;
  font-family: 'DM Mono', ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-dim);
}
.am-inline-nav a {
  color: var(--ink);
  border-bottom: 1px solid var(--ink-dim);
  margin: 0 6px;
  transition: color 200ms ease, border-color 200ms ease;
}
.am-inline-nav a:hover { color: var(--accent); border-color: var(--accent); }

/* ── Section frame ────────────────────────────────────────── */
.am-section {
  padding: 80px 56px 80px 88px;
  max-width: 1280px;
  margin: 0 auto;
}
.am-section-head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  max-width: 900px;
  margin-bottom: 36px;
}
.am-section-head h2 {
  font-family: 'Newsreader', serif;
  font-weight: 300;
  font-size: clamp(36px, 4.6vw, 56px);
  line-height: 1.05;
  letter-spacing: -0.015em;
  margin: 0;
  text-wrap: balance;
}
.am-section-head .am-section-italic {
  font-style: italic;
  color: var(--accent);
}
.am-section-prose {
  max-width: 720px;
  font-family: 'Newsreader', serif;
  font-weight: 300;
  font-size: 18px;
  line-height: 1.6;
  color: var(--ink);
}
.am-section-prose p { margin: 0 0 18px; }
.am-section-prose p:last-child { margin-bottom: 0; }
.am-section-prose strong { font-weight: 500; }
.am-section-prose em { font-style: italic; color: var(--ink-soft); }
.am-section-prose code {
  font-family: 'DM Mono', ui-monospace, monospace;
  background: color-mix(in oklab, var(--ink) 8%, transparent);
  padding: 1px 5px;
  font-size: 14px;
}

.am-lede::first-letter {
  font-family: 'Newsreader', Georgia, serif;
  font-weight: 500;
  font-style: normal;
  float: left;
  font-size: 4em;
  line-height: 0.85;
  padding: 0.05em 0.08em 0 0;
  margin: 0.05em 0.06em 0 0;
  color: var(--ink);
}

/* ── Headline panel ───────────────────────────────────────── */
.am-headline {
  margin: 32px 0;
  padding: 28px 32px;
  background: var(--ink);
  color: var(--paper);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  font-family: 'DM Mono', ui-monospace, monospace;
  font-variant-numeric: tabular-nums;
}
.am-headline-cell .num {
  font-family: 'Newsreader', serif;
  font-style: italic;
  font-size: clamp(36px, 4.4vw, 52px);
  font-weight: 300;
  color: var(--accent);
  line-height: 1;
  display: block;
}
.am-headline-cell .label {
  display: block;
  margin-top: 10px;
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: color-mix(in oklab, var(--paper) 60%, transparent);
}
@media (max-width: 900px) {
  .am-headline { grid-template-columns: repeat(2, 1fr); }
}

/* ── Receipts box ─────────────────────────────────────────── */
.am-receipts {
  margin-top: 36px;
  padding: 20px 24px;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  background: color-mix(in oklab, var(--paper) 88%, var(--ink) 6%);
  font-family: 'DM Mono', ui-monospace, monospace;
  font-size: 12px;
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
}
.am-receipts-head {
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}
.am-receipts dl {
  margin: 0;
  display: grid;
  grid-template-columns: minmax(220px, 280px) 1fr;
  gap: 6px 24px;
}
.am-receipts dt { color: var(--ink-dim); }
.am-receipts dd { margin: 0; color: var(--ink); }
@media (max-width: 720px) {
  .am-receipts dl { grid-template-columns: 1fr; gap: 2px; }
  .am-receipts dd { margin-bottom: 8px; }
}

/* ── For-the-curious expander ─────────────────────────────── */
.am-curious {
  margin-top: 28px;
  padding: 16px 20px;
  border-left: 2px solid var(--ink-dim);
  background: transparent;
  font-family: 'DM Mono', ui-monospace, monospace;
  font-size: 12px;
  line-height: 1.6;
  color: var(--ink-soft);
}
.am-curious summary {
  cursor: pointer;
  color: var(--ink);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  list-style: none;
  outline: none;
}
.am-curious summary::-webkit-details-marker { display: none; }
.am-curious summary::before {
  content: '\25B8 ';
  display: inline-block;
  margin-right: 6px;
  transition: transform 200ms ease;
}
.am-curious[open] summary::before { transform: rotate(90deg); }
.am-curious p { margin: 14px 0 0; }
.am-curious code {
  font-family: 'DM Mono', ui-monospace, monospace;
  background: color-mix(in oklab, var(--ink) 10%, transparent);
  padding: 1px 5px;
  font-size: 11px;
}

/* ═══════════════════════════════════════════════════════════
   CHART FRAMES (each chart in its own panel)
   ═══════════════════════════════════════════════════════════ */
.am-chart-wrap {
  margin: 36px 0 12px;
  padding: 28px 32px;
  border: 1px solid color-mix(in oklab, var(--ink) 20%, transparent);
  background: color-mix(in oklab, var(--paper) 92%, var(--ink) 4%);
}
.am-chart-head {
  font-family: 'DM Mono', ui-monospace, monospace;
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin-bottom: 8px;
}
.am-chart-title {
  font-family: 'Newsreader', serif;
  font-size: 22px;
  margin-bottom: 6px;
  font-weight: 400;
}
.am-chart-sub {
  font-family: 'DM Mono', ui-monospace, monospace;
  font-size: 11px;
  color: var(--ink-soft);
  margin-bottom: 24px;
  letter-spacing: 0.04em;
}
.am-chart-svg { display: block; width: 100%; height: auto; user-select: none; }
.am-chart-legend {
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  font-family: 'DM Mono', ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--ink);
}
.am-chart-legend .swatch {
  display: inline-block;
  width: 14px;
  height: 14px;
  vertical-align: middle;
  margin-right: 8px;
}

/* ── Shared SVG primitives ────────────────────────────────── */
.am-chart-svg .axis-line { stroke: var(--ink); stroke-width: 1; }
.am-chart-svg .gridline { stroke: var(--ink-dim); stroke-width: 0.5; opacity: 0.35; }
.am-chart-svg .axis-label {
  font-family: 'DM Mono', ui-monospace, monospace;
  font-size: 9.5px;
  fill: var(--ink-dim);
  letter-spacing: 0.04em;
}
.am-chart-svg .approach-label {
  font-family: 'Newsreader', serif;
  font-size: 12px;
  fill: var(--ink);
  cursor: default;
}
.am-chart-svg .approach-score {
  font-family: 'DM Mono', ui-monospace, monospace;
  font-size: 10.5px;
  fill: var(--ink);
  font-variant-numeric: tabular-nums;
}

/* ── Bar fills (used in §II and §V) ───────────────────────── */
.am-chart-svg .bar-frontier   { fill: var(--accent); }
.am-chart-svg .bar-framework  { fill: color-mix(in oklab, var(--accent) 40%, var(--ink) 60%); }
.am-chart-svg .bar-graph      { fill: color-mix(in oklab, var(--accent) 25%, var(--ink) 75%); }
.am-chart-svg .bar-vector     { fill: var(--ink); opacity: 0.7; }
.am-chart-svg .bar-naive      { fill: var(--ink-dim); opacity: 0.85; }
.am-chart-svg .bar-oracle     { fill: none; stroke: var(--accent); stroke-width: 1.5; stroke-dasharray: 4 3; }
.am-chart-svg .bar-anchor     { fill: color-mix(in oklab, var(--accent) 18%, var(--ink-dim) 82%); opacity: 0.9; }
.am-chart-svg [data-row]:hover .bar { filter: brightness(1.12); }
.am-chart-svg [data-row]:hover .approach-label { fill: var(--accent); }

/* Oracle ceiling marker on Chart 1 */
.am-chart-svg .ceiling-line {
  stroke: var(--accent);
  stroke-dasharray: 3 3;
  stroke-width: 1;
  opacity: 0.6;
}
.am-chart-svg .ceiling-label {
  font-family: 'DM Mono', ui-monospace, monospace;
  font-size: 9px;
  letter-spacing: 0.1em;
  fill: var(--accent);
  text-transform: uppercase;
}

/* ── Legend swatches (matches bar fills) ──────────────────── */
.am-legend-frontier   { background: var(--accent); }
.am-legend-framework  { background: color-mix(in oklab, var(--accent) 40%, var(--ink) 60%); }
.am-legend-graph      { background: color-mix(in oklab, var(--accent) 25%, var(--ink) 75%); }
.am-legend-vector     { background: var(--ink); opacity: 0.7; }
.am-legend-naive      { background: var(--ink-dim); opacity: 0.85; }
.am-legend-oracle     { background: transparent; border: 1.5px dashed var(--accent); }
.am-legend-anchor     { background: color-mix(in oklab, var(--accent) 18%, var(--ink-dim) 82%); }
.am-legend-file       { background: color-mix(in oklab, var(--accent) 35%, var(--ink) 65%); }
.am-legend-hybrid     { background: color-mix(in oklab, var(--accent) 60%, var(--ink) 40%); }
.am-legend-native     { background: var(--ink-dim); }

/* ── Tooltip overlay ──────────────────────────────────────── */
.am-tooltip {
  position: absolute;
  pointer-events: none;
  z-index: 50;
  padding: 10px 14px;
  background: var(--ink);
  color: var(--paper);
  font-family: 'DM Mono', ui-monospace, monospace;
  font-size: 11px;
  line-height: 1.5;
  letter-spacing: 0.04em;
  border: 1px solid var(--accent);
  max-width: 320px;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 160ms ease, transform 160ms ease;
}
.am-tooltip.is-visible { opacity: 1; transform: translateY(0); }
.am-tooltip strong { color: var(--accent); font-weight: 500; }
.am-tooltip-host { position: relative; }

/* ── Chart 2: Pareto scatter ──────────────────────────────── */
.am-chart-svg .quad-axis { stroke: var(--ink); stroke-width: 1; }
.am-chart-svg .quad-mid { stroke: var(--ink-dim); stroke-width: 0.5; stroke-dasharray: 2 4; }
.am-chart-svg .pareto-line {
  fill: none;
  stroke: var(--accent);
  stroke-width: 1;
  stroke-dasharray: 5 4;
  opacity: 0.55;
}
.am-chart-svg .quad-label {
  font-family: 'DM Mono', ui-monospace, monospace;
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  fill: var(--ink-dim);
}
.am-chart-svg .quad-quadrant-label {
  font-family: 'Newsreader', serif;
  font-style: italic;
  font-size: 12px;
  fill: var(--ink-dim);
  opacity: 0.7;
}
.am-chart-svg .bubble {
  cursor: pointer;
  transition: r 180ms ease, fill-opacity 180ms ease;
}
.am-chart-svg .bubble-file       { fill: color-mix(in oklab, var(--accent) 35%, var(--ink) 65%); fill-opacity: 0.78; }
.am-chart-svg .bubble-framework  { fill: color-mix(in oklab, var(--accent) 40%, var(--ink) 60%); fill-opacity: 0.7; }
.am-chart-svg .bubble-graph      { fill: color-mix(in oklab, var(--accent) 25%, var(--ink) 75%); fill-opacity: 0.7; }
.am-chart-svg .bubble-vector     { fill: var(--ink); fill-opacity: 0.55; }
.am-chart-svg .bubble-naive      { fill: var(--ink-dim); fill-opacity: 0.7; }
.am-chart-svg .bubble-frontier   { fill: var(--accent); fill-opacity: 0.85; }
.am-chart-svg .bubble:hover { fill-opacity: 1; stroke: var(--accent); stroke-width: 1.5; }

/* ── Chart 3: 2x2 quadrant pills ──────────────────────────── */
.am-chart-svg .quad-pill {
  cursor: pointer;
  fill-opacity: 0.18;
  stroke-width: 1.5;
  transition: fill-opacity 200ms ease;
}
.am-chart-svg .quad-pill-file      { fill: color-mix(in oklab, var(--accent) 35%, var(--ink) 65%); stroke: color-mix(in oklab, var(--accent) 50%, var(--ink) 50%); }
.am-chart-svg .quad-pill-hybrid    { fill: color-mix(in oklab, var(--accent) 60%, var(--ink) 40%); stroke: color-mix(in oklab, var(--accent) 75%, var(--ink) 25%); }
.am-chart-svg .quad-pill-native    { fill: var(--ink-dim); stroke: var(--ink-dim); }
.am-chart-svg .quad-pill-framework { fill: var(--accent); stroke: var(--accent); }
.am-chart-svg [data-quad-item]:hover .quad-pill { fill-opacity: 0.45; }
.am-chart-svg .quad-pill-name {
  font-family: 'Newsreader', serif;
  font-weight: 400;
  font-size: 14px;
  fill: var(--ink);
  pointer-events: none;
}
.am-chart-svg .quad-pill-sub {
  font-family: 'DM Mono', ui-monospace, monospace;
  font-size: 9px;
  letter-spacing: 0.06em;
  fill: var(--ink-soft);
  pointer-events: none;
}
.am-chart-svg .quad-pill-note {
  font-family: 'DM Mono', ui-monospace, monospace;
  font-size: 9px;
  letter-spacing: 0.04em;
  fill: var(--ink-dim);
  text-transform: uppercase;
  pointer-events: none;
}

/* ── Methodology / closing ────────────────────────────────── */
.am-method {
  padding: 80px 56px 80px 88px;
  max-width: 1080px;
  margin: 0 auto;
  border-top: 1px solid color-mix(in oklab, var(--ink) 22%, transparent);
}
.am-method-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px 48px;
}
.am-method-grid h3 {
  font-family: 'DM Mono', ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 12px;
}
.am-method-grid p {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.55;
  color: var(--ink-soft);
}
.am-method-grid a {
  color: var(--ink);
  border-bottom: 1px solid var(--ink-dim);
}
.am-method-grid a:hover { color: var(--accent); border-color: var(--accent); }
.am-closing {
  margin-top: 56px;
  padding-top: 36px;
  border-top: 1px solid color-mix(in oklab, var(--ink) 22%, transparent);
  font-family: 'Newsreader', serif;
  font-style: italic;
  font-weight: 300;
  font-size: 19px;
  line-height: 1.55;
  color: var(--ink);
  max-width: 720px;
}
.am-closing p { margin: 0 0 16px; }

/* ── Lab nav (story-style) ────────────────────────────────── */
.lab-nav {
  margin: 0 88px 80px;
  padding: 22px 0;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.lab-nav a { color: var(--ink); border-bottom: 1px solid transparent; transition: border-color 180ms ease; }
.lab-nav a:hover { border-bottom-color: var(--ink); }
.lab-nav-meta { color: var(--ink-dim); }

@media (max-width: 900px) {
  .am-hero { padding: 100px 24px 40px; }
  .am-section { padding: 60px 24px; }
  .am-method { padding: 60px 24px; }
  .am-method-grid { grid-template-columns: 1fr; gap: 28px; }
  .am-dateline { grid-template-columns: 1fr; gap: 14px; }
  .lab-nav { flex-direction: column; gap: 10px; align-items: flex-start; margin: 0 24px 60px; }
}