/* Design tokens */
:root {
  --color-bg: #f7f6f2;
  --color-surface: #ffffff;
  --color-surface-2: #fbfbf9;
  --color-border: #dcd9d2;
  --color-text: #1c1c1c;
  --color-text-muted: #6b6a64;
  --color-text-faint: #6f6c64; /* WCAG AA fix: darkened from #a3a19a (was 2.39:1) to pass 4.5:1 on white and page bg */
  --color-primary: #1E3958;      /* LAMP navy */
  --color-primary-2: #CC922E;    /* LAMP gold, third stop marker */
  --color-primary-3: #112030;    /* LAMP midnight, fourth stop marker */
  --color-primary-4: #F7D658;    /* LAMP sunburst, second stop marker (washrooms) */
  --color-primary-5: #BBBBBB;    /* LAMP steel, fourth stop marker (accessible elevator) */
  --color-primary-6: #9C9B92;    /* Stone, a darker neutral derived from LAMP light grey, for AA contrast on the third stop marker (accessible washroom interior) */
  --color-gold: #CC922E;         /* LAMP gold */
  --color-tan-bg: #f4ecd8;
  --color-tan-border: #e0cf9d;

  --font-display: 'Fraunces', Georgia, serif;
  --font-body: 'Inter', 'Helvetica Neue', sans-serif;

  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-full: 9999px;

  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;

  --shadow-sm: 0 1px 2px rgba(28,28,28,0.06);
  --shadow-md: 0 4px 16px rgba(28,28,28,0.08);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  padding: clamp(1rem, 3vw, 2.5rem);
  max-width: 1280px;
  margin: 0 auto;
}

img { display: block; max-width: 100%; height: auto; border-radius: var(--radius-lg); }

button {
  font: inherit;
  cursor: pointer;
  background: none;
  border: none;
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-md);
}

/* Header */
.page-header {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
  justify-content: space-between;
  align-items: flex-start;
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-6);
}
.header-text h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.4rem, 1.1rem + 1.2vw, 2rem);
  line-height: 1.2;
}
.header-dash { margin: 0 0.5ch; color: var(--color-text-faint); font-family: var(--font-body); }
.subtitle {
  margin-top: var(--space-2);
  color: var(--color-text-muted);
  font-size: 0.95rem;
}
.disclaimer {
  background: var(--color-tan-bg);
  border: 1px solid var(--color-tan-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  font-size: 0.85rem;
  color: #5c4a1f;
  max-width: 380px;
  line-height: 1.5;
}
.disclaimer strong { display: block; margin-bottom: 2px; }

/* Layout */
.layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  align-items: start;
}
@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; }
}

/* Plan panel */
.plan-panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  box-shadow: var(--shadow-sm);
}
.plan-frame { width: 100%; }
.plan-svg { width: 100%; height: auto; display: block; }
.marker { cursor: pointer; transition: transform 160ms ease; transform-origin: center; }
.marker:hover, .marker:focus-visible { transform: scale(1.12); }

.plan-legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-top: var(--space-4);
  font-size: 0.8rem;
  color: var(--color-text-muted);
}
.plan-legend span { display: inline-flex; align-items: center; gap: 6px; }
.dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.dot-navy { background: var(--color-primary); }
.dot-gold { background: var(--color-gold); }
.dot-midnight { background: var(--color-primary-3); }
.dot-sunburst { background: var(--color-primary-4); }
.dot-steel { background: var(--color-primary-5); }
.dot-stone { background: var(--color-primary-6); }

/* View panel */
.view-panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.view-topbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
}
.stop-badge {
  background: var(--color-primary);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 6px 12px;
  border-radius: var(--radius-full);
}
.view-nav { display: flex; gap: var(--space-2); flex-wrap: wrap; }
.btn {
  font-size: 0.85rem;
  font-weight: 600;
  padding: 8px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  transition: background 160ms ease, color 160ms ease, border-color 160ms ease;
}
.btn-secondary { background: var(--color-surface-2); color: var(--color-text); }
.btn-secondary:hover { background: var(--color-bg); }
.btn-primary { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.btn-primary:hover { background: #16281f; }
.btn-primary.playing { background: var(--color-gold); border-color: var(--color-gold); }

.view-figure { border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--color-border); }

.view-caption h2 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 6px;
}
.view-caption p { color: var(--color-text-muted); font-size: 0.92rem; max-width: 60ch; }

.view-footer-row {
  display: flex;
  justify-content: flex-end;
  font-size: 0.8rem;
  color: var(--color-text-faint);
}

/* Stops row */
.stops-row {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-3);
  margin-top: var(--space-6);
}
@media (max-width: 1100px) {
  .stops-row { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 720px) {
  .stops-row { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .stops-row { grid-template-columns: 1fr; }
}
.stop-tile {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  font-size: 0.9rem;
  font-weight: 600;
  text-align: left;
  transition: border-color 160ms ease, background 160ms ease;
}
.stop-tile:hover { background: var(--color-surface-2); }
.stop-tile.active { border-color: var(--color-primary); background: var(--color-surface-2); }
.stop-num {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  color: #fff;
  font-size: 0.75rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.stop-num-navy { background: var(--color-primary); }
.stop-num-green { background: var(--color-primary-2); color: #1c1c1c; } /* WCAG AA fix: white-on-gold was 2.72:1; dark text on gold is 6.26:1 */
.stop-num-midnight { background: var(--color-primary-3); }
.stop-num-sunburst { background: var(--color-primary-4); color: #1c1c1c; } /* dark text on sunburst yellow for AA contrast */
.stop-num-steel { background: var(--color-primary-5); color: #1c1c1c; } /* dark text on steel grey for AA contrast */
.stop-num-stone { background: var(--color-primary-6); color: #1c1c1c; } /* dark text on stone grey for AA contrast (white text only reaches ~2.8:1) */

/* Footer */
.page-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-3);
  margin-top: var(--space-8);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
  font-size: 0.78rem;
  color: var(--color-text-faint);
}