/* ML, Visualized — shared editorial layout
   Layered on top of the site's Notebook tokens (see ../styles.css).
   Provides the three-column stage layout, matrix editor, mode tabs,
   presets list, readout, captions, and marginalia. */

:root {
  --ml-paper-card: var(--paper, #fffdf6);
  --ml-rule:       var(--rule,  #cfc6b3);
  --ml-rule-soft:  rgba(207,198,179,0.45);
  --ml-ink-soft:   #4a4239;
  --ml-ink-fade:   rgba(38,35,32,0.55);
  --ml-accent-soft: rgba(122,31,36,0.10);
}

/* ───────── Page shell ───────── */
.ml-page-shell {
  max-width: 1280px;
  margin: 0 auto;
  padding: 56px 48px 80px;
}
.ml-mast {
  border-bottom: 1px solid var(--ml-rule);
  padding-bottom: 36px;
  margin-bottom: 48px;
  text-align: center;
}
.ml-mast .kicker {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ml-ink-fade);
  margin-bottom: 18px;
}
.ml-mast h1 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(48px, 7vw, 84px);
  line-height: 0.97;
  margin: 0 0 22px;
  letter-spacing: -0.02em;
  text-wrap: balance;
}
.ml-mast h1 em {
  font-style: italic;
  font-weight: 300;
  color: var(--accent);
}
.ml-mast .dek {
  font-family: var(--serif);
  font-size: 19px;
  line-height: 1.55;
  font-style: italic;
  font-weight: 300;
  color: var(--ml-ink-soft);
  max-width: 640px;
  margin: 0 auto;
  text-wrap: pretty;
}

/* ───────── Concept intro (between masthead and stage) ───────── */
.ml-intro {
  max-width: 760px;
  margin: 0 auto 64px;
  padding: 0 8px;
}
.ml-intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-bottom: 36px;
}
.ml-intro-block .ml-eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ml-ink-fade);
  margin: 0 0 14px;
}
.ml-intro-block .ml-eyebrow.accent { color: var(--accent); }
.ml-intro-block p {
  font-family: var(--serif);
  font-size: 16.5px;
  line-height: 1.65;
  color: var(--ml-ink-soft);
  margin: 0 0 12px;
  text-wrap: pretty;
}
.ml-intro-block p.lead {
  color: var(--ink);
  font-size: 17.5px;
  font-weight: 400;
  font-style: italic;
}
.ml-intro-block p em {
  color: var(--accent);
  font-style: italic;
}
.ml-intro-block p .term {
  font-style: italic;
  color: var(--ink);
}

.ml-try {
  border-top: 1px solid var(--ml-rule);
  padding-top: 22px;
  margin-top: 12px;
}
.ml-try ol {
  margin: 0;
  padding-left: 22px;
  font-family: var(--serif);
  font-size: 15.5px;
  line-height: 1.6;
  color: var(--ml-ink-soft);
}
.ml-try ol li { margin-bottom: 8px; }
.ml-try ol li em {
  color: var(--ink);
  font-style: italic;
  font-weight: 500;
}
.ml-try ol li::marker {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 12px;
}

@media (max-width: 760px) {
  .ml-intro-grid { grid-template-columns: 1fr; gap: 28px; }
}

/* ───────── Stage (three columns) ───────── */
.ml-stage {
  display: grid;
  grid-template-columns: 260px 1fr 260px;
  gap: 56px;
  align-items: start;
}
.ml-rail-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ml-ink-fade);
  margin-bottom: 14px;
}

/* ───────── Matrix entry editor ───────── */
.ml-matrix {
  position: relative;
  display: flex;
  align-items: stretch;
  padding: 8px 0;
  margin-bottom: 8px;
}
.ml-bracket {
  width: 14px;
  border: 1.5px solid var(--ink);
  border-right: none;
}
.ml-bracket.right { border-left: none; border-right: 1.5px solid var(--ink); }
.ml-entries {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  flex: 1;
  padding: 6px 12px;
}
.ml-cell-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 56px;
}
.ml-cell, .ml-cell-input {
  font-family: var(--mono);
  font-size: 22px;
  color: var(--ink);
  background: transparent;
  border: none;
  outline: none;
  text-align: center;
  width: 100%;
  padding: 6px 4px;
  border-radius: 4px;
  transition: background 0.15s;
  user-select: none;
}
.ml-cell { cursor: ew-resize; }
.ml-cell:hover { background: var(--ml-accent-soft); }
.ml-cell-input {
  cursor: text;
  background: var(--ml-accent-soft);
  user-select: text;
}
.ml-hint {
  font-family: var(--serif);
  font-size: 11px;
  font-style: italic;
  color: var(--ml-ink-fade);
  margin-bottom: 22px;
  text-align: center;
}

/* ───────── Readout (tr/det/λ rows) ───────── */
.ml-readout {
  border-top: 1px solid var(--ml-rule);
  border-bottom: 1px solid var(--ml-rule);
  padding: 14px 0;
}
.ml-readout .row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 4px 0;
  font-family: var(--mono);
  font-size: 13px;
}
.ml-readout .row span { color: var(--ml-ink-fade); }
.ml-readout .row b { font-weight: 500; color: var(--ink); }

/* ───────── Presets list ───────── */
.ml-presets {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--ml-rule);
  border-bottom: 1px solid var(--ml-rule);
  margin-bottom: 14px;
}
.ml-preset {
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--ml-rule);
  padding: 11px 4px;
  text-align: left;
  cursor: pointer;
  font-family: var(--serif);
  font-size: 16px;
  color: var(--ml-ink-soft);
  transition: color 0.12s, padding-left 0.12s;
}
.ml-preset:last-child { border-bottom: none; }
.ml-preset:hover { color: var(--ink); padding-left: 8px; }
.ml-preset.active { color: var(--accent); font-style: italic; padding-left: 8px; }
.ml-preset.active::before { content: "·"; margin-right: 8px; color: var(--accent); }
.ml-preset-blurb {
  font-family: var(--serif);
  font-style: italic;
  font-size: 14px;
  line-height: 1.5;
  color: var(--ml-ink-soft);
  padding: 0 4px;
  min-height: 1.5em;
}

.ml-resample-btn {
  margin-top: 8px;
  background: transparent;
  border: 1px solid var(--ml-rule);
  padding: 8px 16px;
  font-family: var(--serif);
  font-style: italic;
  font-size: 14px;
  color: var(--ml-ink-soft);
  cursor: pointer;
  width: 100%;
  transition: background 0.12s, color 0.12s, border-color 0.12s;
}
.ml-resample-btn:hover {
  background: var(--ml-accent-soft);
  color: var(--accent);
  border-color: var(--accent);
}

/* ───────── Parameter sliders (used by distributions, bayes, etc.) ───────── */
.ml-params {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 18px;
}
.ml-param-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-family: var(--mono);
  font-size: 11px;
  margin-bottom: 4px;
}
.ml-param-head .label { color: var(--ml-ink-fade); }
.ml-param-head .label em {
  color: var(--ml-ink-fade);
  font-style: italic;
  opacity: 0.75;
  margin-left: 4px;
}
.ml-param-head b { color: var(--ink); }
.ml-params input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

/* ───────── Sample buttons (used by distributions) ───────── */
.ml-sample-row {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 8px;
}
.ml-sbtn {
  background: var(--ink);
  color: var(--bg);
  border: none;
  padding: 6px 12px;
  font-family: var(--mono);
  font-size: 12px;
  cursor: pointer;
}
.ml-sbtn:hover { background: var(--accent); }
.ml-sbtn.ghost {
  background: transparent;
  color: var(--ml-ink-fade);
  border: 1px solid var(--ml-rule);
}
.ml-sbtn.ghost:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: transparent;
}

/* ───────── Canvas + mode tabs ───────── */
.ml-canvas-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.ml-mode-tabs {
  display: flex;
  gap: 2px;
  margin-bottom: 22px;
  border-bottom: 1px solid var(--ml-rule);
  width: 100%;
  justify-content: center;
}
.ml-mode-tabs button {
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  padding: 10px 22px;
  font-family: var(--serif);
  font-size: 16px;
  color: var(--ml-ink-fade);
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}
.ml-mode-tabs button:hover { color: var(--ml-ink-soft); }
.ml-mode-tabs button.on {
  color: var(--ink);
  border-bottom-color: var(--accent);
  font-style: italic;
}

.ml-canvas-frame {
  width: 100%;
  max-width: 580px;
  aspect-ratio: 1 / 1;
  background: var(--ml-paper-card);
  border: 1px solid var(--ml-rule);
  position: relative;
  overflow: hidden;
}
.ml-canvas-frame canvas { display: block; width: 100%; height: 100%; }

.ml-caption {
  margin-top: 22px;
  max-width: 580px;
  font-family: var(--serif);
  font-size: 16px;
  line-height: 1.6;
  color: var(--ml-ink-soft);
  font-style: italic;
  font-weight: 300;
  padding: 0 4px;
}
.ml-cap-num {
  font-style: normal;
  font-weight: 500;
  color: var(--ink);
  margin-right: 6px;
}
.ml-ink {
  font-style: normal;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.92em;
}
.ml-ink-orange {
  font-style: normal;
  color: var(--accent);
  font-weight: 500;
}
.ml-ink-mono {
  font-family: var(--mono);
  font-size: 0.9em;
  color: var(--ml-ink-soft);
  font-style: normal;
}

/* Iter / replay strip below canvas */
.ml-iter {
  margin-top: 20px;
  display: flex;
  gap: 16px;
  align-items: center;
  width: 100%;
  max-width: 580px;
}
.ml-iter button {
  background: var(--ink);
  color: var(--bg);
  border: none;
  padding: 8px 22px;
  font-family: var(--serif);
  font-size: 14px;
  font-style: italic;
  cursor: pointer;
}
.ml-iter button:hover { background: var(--accent); }
.ml-iter input[type="range"] {
  flex: 1;
  accent-color: var(--accent);
}
.ml-iter .step {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ml-ink-fade);
  min-width: 64px;
  text-align: right;
}

/* ───────── Marginalia ───────── */
.ml-margin { padding-top: 8px; }
.ml-margin-rule { border-top: 2px solid var(--ink); margin-bottom: 14px; }
.ml-margin-rule.thin {
  border-top: 1px solid var(--ml-rule);
  margin-top: 28px;
  margin-bottom: 14px;
}
.ml-margin-h {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink);
  margin-bottom: 18px;
  font-weight: 500;
}
.ml-margin-h.sm { font-size: 10px; }
.ml-margin p {
  font-family: var(--serif);
  font-size: 15.5px;
  line-height: 1.65;
  color: var(--ml-ink-soft);
  margin: 0 0 14px;
  font-weight: 400;
}
.ml-margin p em {
  color: var(--accent);
  font-style: italic;
}
.ml-margin .quiet {
  font-size: 14px;
  color: var(--ml-ink-fade);
}
.ml-equation {
  font-family: var(--serif);
  font-style: italic;
  font-size: 26px;
  text-align: center;
  color: var(--ink);
  margin: 14px 0 18px;
  letter-spacing: 0.02em;
}

/* ───────── Applications + Further reading (after the stage, before footer) ───────── */
.ml-applications,
.ml-further {
  max-width: 760px;
  margin: 56px auto 0;
  padding: 0 8px;
}
.ml-section-rule {
  border-top: 2px solid var(--ink);
  padding-top: 14px;
  margin-bottom: 28px;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
}
.ml-section-rule .kicker {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink);
  font-weight: 500;
}
.ml-section-rule .meta {
  font-family: var(--serif);
  font-style: italic;
  font-size: 13px;
  color: var(--ml-ink-fade);
}

.ml-app-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 36px;
  row-gap: 28px;
}
.ml-app .ml-app-h {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 500;
  color: var(--ink);
  margin: 0 0 8px;
  text-wrap: balance;
  line-height: 1.25;
}
.ml-app p {
  font-family: var(--serif);
  font-size: 15px;
  line-height: 1.6;
  color: var(--ml-ink-soft);
  margin: 0;
  text-wrap: pretty;
}
.ml-app p em {
  color: var(--accent);
  font-style: italic;
}
.ml-app p .term {
  font-style: italic;
  color: var(--ink);
}

.ml-further-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.ml-further-list li {
  font-family: var(--serif);
  font-size: 15.5px;
  line-height: 1.55;
  color: var(--ml-ink-soft);
  padding: 12px 0;
  border-bottom: 1px solid var(--ml-rule-soft);
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
}
.ml-further-list li:last-child { border-bottom: 0; }
.ml-further-list li .title { flex: 1; min-width: 280px; }
.ml-further-list li .title em {
  font-style: italic;
  color: var(--ink);
}
.ml-further-list li a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--ml-rule);
}
.ml-further-list li a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}
.ml-further-list li .kind {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--ml-ink-fade);
}
.ml-further-list li .by {
  font-family: var(--serif);
  font-style: italic;
  font-size: 14px;
  color: var(--ml-ink-fade);
  flex-basis: 100%;
  margin-top: -2px;
}

@media (max-width: 760px) {
  .ml-app-grid { grid-template-columns: 1fr; gap: 24px; }
}

/* ───────── Footer ───────── */
.ml-foot {
  margin-top: 80px;
  padding-top: 24px;
  border-top: 1px solid var(--ml-rule);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: baseline;
  gap: 24px;
}
.ml-foot .line {
  font-family: var(--serif);
  font-style: italic;
  font-size: 13px;
  color: var(--ml-ink-fade);
  text-align: center;
}
.ml-foot .line:first-child  { text-align: left; }
.ml-foot .line:last-child   { text-align: right; }
.ml-foot .line.eq {
  font-family: var(--mono);
  font-style: normal;
}
.ml-foot a {
  color: var(--ml-ink-fade);
  text-decoration: none;
  border-bottom: 1px solid var(--ml-rule);
}
.ml-foot a:hover { color: var(--accent); border-bottom-color: var(--accent); }

/* ───────── Responsive ───────── */
@media (max-width: 1100px) {
  .ml-page-shell { padding: 40px 32px 64px; }
  .ml-stage { grid-template-columns: 1fr; gap: 48px; }
  .ml-stage > .left-rail,
  .ml-stage > .right-rail {
    max-width: 580px;
    margin: 0 auto;
    width: 100%;
  }
}
@media (max-width: 600px) {
  .ml-page-shell { padding: 28px 20px 48px; }
  .ml-mode-tabs button { padding: 10px 12px; font-size: 14px; }
  .ml-foot { grid-template-columns: 1fr; }
  .ml-foot .line,
  .ml-foot .line:first-child,
  .ml-foot .line:last-child { text-align: center; }
}