/* Interactive guide */
.primer-panel {
  border: 2px inset var(--window-chrome);
  background: var(--inset-dark);
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  overflow: hidden;
}

.primer-copy,
.primer-visual {
  background: oklch(0.98 0.002 90);
  padding: clamp(14px, 2vw, 22px);
  min-width: 0;
}

.primer-copy {
  border-right: 2px solid var(--inset-dark);
}

.primer-visual {
  display: grid;
  gap: 10px;
  align-content: center;
}

.primer-controls {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.primer-controls .tree-button {
  justify-content: center;
  text-align: center;
  padding-inline: 6px;
}

.primer-map {
  border: 2px inset var(--window-chrome);
  background: oklch(0.91 0.006 250);
  padding: 10px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.primer-node {
  min-height: 108px;
  border: 2px outset var(--button-face);
  background: oklch(0.98 0.002 90);
  padding: 9px;
  display: grid;
  align-content: start;
  gap: 6px;
  position: relative;
  transition: background 160ms ease-out, filter 160ms ease-out;
}

.primer-node:not(:last-child)::after {
  content: "";
  display: none;
}

.primer-node.is-lit {
  filter: brightness(1.04);
}

.primer-node.is-active {
  border-style: inset;
  background: oklch(0.94 0.07 88);
  animation: trace-pulse 1800ms ease-out infinite;
}

.primer-node small {
  color: var(--text-dark);
  font: 700 11px/1.2 "IBM Plex Mono", monospace;
  text-transform: uppercase;
}

.primer-node b {
  color: var(--title-bar);
  font: 700 13px/1.2 "IBM Plex Mono", monospace;
  overflow-wrap: anywhere;
}

.primer-node span,
.primer-status span {
  color: var(--text-soft);
  font: 13px/1.42 "IBM Plex Sans", system-ui, sans-serif;
}

.primer-status {
  border: 2px inset var(--window-chrome);
  background: oklch(0.98 0.002 90);
  padding: 10px;
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 10px;
  align-items: center;
}

.primer-beacon {
  width: 22px;
  height: 22px;
  border: 2px inset var(--button-face);
  background: oklch(0.20 0.01 250);
  position: relative;
  overflow: hidden;
}

.primer-beacon::after {
  content: "";
  position: absolute;
  inset: 4px auto 4px 2px;
  width: 9px;
  background: var(--accent-gold);
  animation: trace-scan 2400ms ease-out infinite;
}

.primer-status b {
  color: var(--title-bar);
  font: 700 13px/1.25 "IBM Plex Mono", monospace;
  overflow-wrap: anywhere;
}

.section-window {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: 0;
  border: 2px inset var(--window-chrome);
  background: var(--inset-dark);
  overflow: hidden;
}

.section-copy,
.section-visual {
  background: oklch(0.98 0.002 90);
  padding: clamp(14px, 2vw, 22px);
  min-width: 0;
}

.section-copy {
  border-right: 2px solid var(--inset-dark);
}

.eyebrow {
  margin: 0 0 7px;
  color: var(--accent-cyan);
  font-size: 13px;
  font-weight: 700;
}

h2 {
  margin: 0;
  color: var(--title-bar);
  font-size: 30px;
  font-size: clamp(30px, 4vw, 50px);
}

h3 {
  margin: 0 0 10px;
  color: var(--title-bar);
  font-size: 20px;
}

.body-copy,
.primer-copy p,
.section-copy p,
.note-list li,
.dialog-body p {
  font: 500 15px "IBM Plex Sans", system-ui, sans-serif;
  line-height: 1.62;
  color: var(--text-dark);
}

.note-list {
  margin: 14px 0 0;
  padding-left: 18px;
  display: grid;
  gap: 7px;
}

.section-visual {
  display: grid;
  align-content: center;
  gap: 12px;
}

.visual-frame {
  background: oklch(0.91 0.006 250);
  border: 2px inset var(--window-chrome);
  padding: 10px;
}

.visual-frame img {
  width: 100%;
  background: oklch(0.98 0.002 90);
  border: 1px solid oklch(0.72 0.006 250);
}

.caption {
  margin: 0;
  color: var(--text-soft);
  font: 13px "IBM Plex Sans", system-ui, sans-serif;
  line-height: 1.45;
}

.dependency-stack {
  display: grid;
  gap: 6px;
  margin-top: 8px;
}

.dependency-row {
  min-height: 34px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  border: 2px outset var(--button-face);
  background: var(--button-face);
  padding: 4px 8px;
  font: 13px "IBM Plex Mono", monospace;
}

.dependency-row.active {
  background: var(--accent-gold);
  color: var(--text-dark);
  border-style: inset;
  font-weight: 700;
}

.trace-lab {
  display: grid;
  gap: 12px;
}

.trace-controls {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.trace-screen {
  border: 2px inset var(--window-chrome);
  background: oklch(0.91 0.006 250);
  padding: 10px;
  display: grid;
  gap: 10px;
}

.trace-map {
  position: relative;
  display: grid;
  grid-template-columns: repeat(6, minmax(86px, 1fr));
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 4px;
}

.trace-node {
  min-height: 92px;
  border: 2px outset var(--button-face);
  background: oklch(0.98 0.002 90);
  padding: 8px;
  display: grid;
  align-content: start;
  gap: 5px;
  position: relative;
}

.trace-node.active {
  border-style: inset;
  background: oklch(0.94 0.07 88);
  animation: trace-pulse 1800ms ease-out infinite;
}

.trace-node b {
  color: var(--title-bar);
  font: 700 13px/1.2 "IBM Plex Mono", monospace;
  overflow-wrap: anywhere;
}

.trace-node span {
  color: var(--text-soft);
  font: 12px/1.35 "IBM Plex Sans", system-ui, sans-serif;
}

.trace-node small {
  color: var(--text-dark);
  font: 700 11px/1.2 "IBM Plex Mono", monospace;
  text-transform: uppercase;
}

.trace-connector {
  height: 12px;
  border: 2px inset var(--window-chrome);
  background: oklch(0.20 0.01 250);
  position: relative;
  overflow: hidden;
}

.trace-connector::after {
  content: "";
  position: absolute;
  inset: 2px auto 2px 0;
  width: 34%;
  background: var(--accent-gold);
  animation: trace-scan 2400ms ease-out infinite;
}

.trace-details {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 190px;
  gap: 10px;
  align-items: stretch;
}

.trace-note,
.trace-meter {
  border: 2px inset var(--window-chrome);
  background: oklch(0.98 0.002 90);
  padding: 10px;
  min-width: 0;
}

.trace-note p,
.trace-meter p,
.glossary-term p {
  margin: 0;
  font: 500 14px/1.52 "IBM Plex Sans", system-ui, sans-serif;
}

.trace-meter {
  display: grid;
  align-content: start;
  gap: 8px;
  font: 13px "IBM Plex Mono", monospace;
}

.meter-bar {
  height: 18px;
  border: 2px inset var(--window-chrome);
  background: oklch(0.20 0.01 250);
  position: relative;
  overflow: hidden;
}

.meter-bar span {
  position: absolute;
  inset: 2px auto 2px 2px;
  width: var(--meter-width, 50%);
  background: var(--accent-gold);
}