/* The tour fills the first screen in the campus color; the reference tables
   sit below it on the site's normal light ground. */

.kg-page {
  --stage: var(--accent-hover);
  --on-stage: #ffffff;
  --on-stage-soft: rgba(255, 255, 255, 0.86);
  height: auto;
  min-height: 100dvh;
  background: var(--bg);
  font-variant-numeric: tabular-nums;
}

:root:has(.kg-page) {
  scrollbar-color: #c7ccd6 var(--accent-hover);
}

:root:has(.kg-page):fullscreen {
  scrollbar-width: none;
}

.kg-page ::selection {
  background: rgba(var(--accent-rgb), 0.22);
}

.kg-page .skip-link {
  position: absolute;
  top: -48px;
  left: 8px;
  z-index: 100;
  padding: 0.5rem 0.85rem;
  border-radius: 6px;
  background: #ffffff;
  color: var(--text);
  font-weight: 600;
  text-decoration: none;
}

.kg-page .skip-link:focus {
  top: 8px;
}

/* ── Stage ─────────────────────────────────────── */

.kg-stage {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  height: 100dvh;
  min-height: 560px;
  padding: clamp(1rem, 2.2vh, 1.75rem) clamp(1.25rem, 3.2vw, 3.5rem);
  background: var(--stage);
  color: var(--on-stage);
}

.kg-stage ::selection {
  background: #ffffff;
  color: var(--stage);
}

.kg-stage :focus-visible {
  outline: 3px solid #ffffff;
  outline-offset: 3px;
  border-radius: 4px;
}

.kg-bar {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 2rem;
}

.kg-bar h1 {
  margin: 0;
  font-size: clamp(1.05rem, 1.5vw, 1.5rem);
  font-weight: 600;
  letter-spacing: -0.01em;
}

.kg-bar h1 span {
  font-weight: 400;
  color: var(--on-stage-soft);
}

.kg-bar-link {
  flex: none;
  color: var(--on-stage-soft);
  font-size: clamp(0.92rem, 1.1vw, 1.1rem);
  text-underline-offset: 0.2em;
}

.kg-bar-link:hover {
  color: #ffffff;
}

.kg-diagram {
  position: relative;
  min-height: 0;
  margin-block: 0.5rem;
}

.kg-diagram svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.kg-foot {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: clamp(1.5rem, 4vw, 5rem);
}

.kg-steps {
  min-height: clamp(7.5rem, 21vh, 13.5rem);
  margin: 0;
  padding: 0;
  list-style: none;
}

.kg-step h2 {
  max-width: 28em;
  margin: 0 0 0.4em;
  font-size: clamp(1.7rem, 3.1vw, 3.25rem);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.kg-step p {
  max-width: 62ch;
  margin: 0;
  color: var(--on-stage-soft);
  font-size: clamp(1.05rem, 1.55vw, 1.6rem);
  line-height: 1.4;
}

.kg-step code {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.72em;
  white-space: nowrap;
  opacity: 0.92;
}

.kg-step code::before {
  content: " ";
}

.kg-controls {
  display: grid;
  justify-items: end;
  gap: 0.8rem;
}

.kg-controls[hidden] {
  display: none;
}

.kg-dots {
  display: flex;
  gap: 0.15rem;
}

.kg-dot {
  width: 30px;
  height: 30px;
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
}

.kg-dot::before {
  content: "";
  display: block;
  width: 12px;
  height: 12px;
  margin: auto;
  border: 2px solid #ffffff;
  border-radius: 50%;
  transition: background-color 0.2s ease;
}

.kg-dot[aria-current="step"]::before {
  background: #ffffff;
}

.kg-buttons {
  display: flex;
  gap: 0.5rem;
}

.kg-btn {
  min-height: 46px;
  padding: 0.5rem 1.05rem;
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: 8px;
  background: transparent;
  color: #ffffff;
  font: inherit;
  font-size: 1rem;
  font-weight: 500;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.kg-btn:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.14);
}

.kg-btn:disabled {
  opacity: 0.45;
  cursor: default;
}

.kg-btn-next {
  min-width: 7.5rem;
  border-color: #ffffff;
  background: #ffffff;
  color: var(--stage);
  font-weight: 600;
}

.kg-btn-next:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.88);
}

.kg-enhanced .kg-step:not(.is-active) {
  display: none;
}

/* ── Diagram ───────────────────────────────────── */

.kg-svg text {
  fill: #ffffff;
  stroke: var(--stage);
  stroke-width: 9px;
  stroke-linejoin: round;
  paint-order: stroke;
  font-family: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
}

.kg-scene {
  transition: none;
}

.kg-line {
  fill: none;
  stroke: #ffffff;
  stroke-width: 2.5;
}

.kg-college a {
  cursor: pointer;
}

.kg-college a:hover text {
  text-decoration: underline;
}

.kg-pill rect {
  fill: var(--stage);
  stroke: #ffffff;
  stroke-width: 2.5;
}

.kg-pill.is-solid rect {
  fill: #ffffff;
}

.kg-pill text {
  stroke: none;
}

.kg-pill.is-solid text {
  fill: var(--stage);
}

.kg-pill.is-old rect {
  stroke-dasharray: 9 7;
}

/* Tour highlighting: one group of facts at a time. */
.kg-hop {
  opacity: 0.2;
  transition: opacity 0.45s cubic-bezier(0.16, 1, 0.3, 1);
}

.kg-scene.is-overview .kg-hop {
  opacity: 0.62;
}

.kg-scene .kg-hop.is-on {
  opacity: 1;
}

.kg-line.kg-hop.is-on {
  stroke-width: 4;
  stroke-dasharray: 1;
  animation: kg-draw 0.75s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes kg-draw {
  from { stroke-dashoffset: 1; }
  to { stroke-dashoffset: 0; }
}

/* ── Detail below the stage ────────────────────── */

.kg-detail {
  max-width: 1120px;
  margin: 0 auto;
  padding: clamp(2.5rem, 6vh, 4.5rem) clamp(1.25rem, 3vw, 2.5rem) 3.5rem;
  outline: none;
}

.kg-section {
  margin-bottom: clamp(3rem, 8vh, 5rem);
}

.kg-section h2 {
  margin: 0 0 0.4em;
  color: var(--text);
  font-size: clamp(1.6rem, 2.6vw, 2.25rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.kg-lead {
  max-width: 68ch;
  margin: 0 0 1.5rem;
  color: var(--text-muted);
  font-size: 1.1rem;
  line-height: 1.55;
}

.kg-table-wrap {
  overflow-x: auto;
}

.kg-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 1.04rem;
}

.kg-table th,
.kg-table td {
  padding: 0.72rem 1rem 0.72rem 0;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  text-align: left;
  vertical-align: middle;
}

.kg-table tfoot th,
.kg-table tfoot td {
  border-bottom: 0;
  font-weight: 700;
}

.kg-table thead th {
  color: var(--text-muted);
  font-size: 0.86rem;
  font-weight: 600;
  white-space: nowrap;
}

.kg-table tbody th {
  font-weight: 600;
}

.kg-table code {
  color: var(--text-muted);
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.86em;
}

.kg-table .kg-num {
  padding-right: 2rem;
  text-align: right;
  white-space: nowrap;
}

.kg-table a {
  color: inherit;
  text-underline-offset: 0.2em;
}

.kg-table a:hover {
  color: var(--accent);
}

.kg-bar-col {
  width: 46%;
}

.kg-bar-cell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 3.5rem;
  align-items: center;
  gap: 0.6rem;
}

.kg-bar-track {
  display: block;
}

.kg-bar-fill {
  display: block;
  height: 14px;
  border-radius: 0 4px 4px 0;
  background: #b9bdc7;
}

.kg-bar-value {
  text-align: right;
}

.kg-compare .is-current .kg-bar-fill {
  background: var(--accent);
}

.kg-compare .is-current th,
.kg-compare .is-current td {
  background: rgba(var(--accent-rgb), 0.07);
}

.kg-compare .is-current th {
  padding-left: 0.6rem;
}

.kg-sources {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem 2.5rem;
  margin: 0;
}

.kg-sources dt {
  margin-bottom: 0.3rem;
  color: var(--text);
  font-size: 1.1rem;
  font-weight: 600;
}

.kg-sources dd {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.5;
}

.kg-closing {
  margin: 0;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
}

.kg-closing a {
  margin-left: 0.5rem;
  color: var(--accent);
  text-underline-offset: 0.2em;
}

.kg-visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

/* ── Small screens read the tour as a list ─────── */

@media (max-width: 820px) {
  .kg-stage {
    height: auto;
    min-height: 0;
    grid-template-rows: auto auto;
    gap: 1.5rem;
  }

  .kg-diagram,
  .kg-controls {
    display: none;
  }

  .kg-foot {
    grid-template-columns: minmax(0, 1fr);
  }

  .kg-enhanced .kg-step:not(.is-active) {
    display: block;
  }

  .kg-with-diagram {
    display: none;
  }

  .kg-step + .kg-step {
    margin-top: 1.6rem;
  }

  .kg-step h2 {
    font-size: 1.5rem;
  }

  .kg-step p {
    font-size: 1.05rem;
  }

  .kg-table .kg-num {
    padding-right: 1rem;
  }

  .kg-sources {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 560px) {
  .kg-narrow-hide {
    display: none;
  }

  .kg-table {
    font-size: 0.95rem;
  }

  .kg-table th,
  .kg-table td {
    padding-right: 0.5rem;
  }

  .kg-table .kg-num {
    padding-right: 0;
  }

  .kg-bar-col {
    width: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .kg-hop,
  .kg-dot::before,
  .kg-btn {
    transition: none;
  }

  .kg-line.kg-hop.is-on {
    animation: none;
  }
}

@media (forced-colors: active) {
  .kg-stage {
    border: 1px solid CanvasText;
  }

  .kg-bar-fill {
    background: CanvasText;
    forced-color-adjust: none;
  }
}