* {
  margin: 0;
  padding: 0;
}

body {
  overflow: hidden;
  background: #090b18;
}

/* Fixed to the screen, so the canvas can never push the page wider than
   the phone and make it zoom out. */
canvas {
  position: fixed;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
}

/* Low in the dark ground below the rails, where it never covers the scene. */
.chrome {
  position: fixed;
  left: 28px;
  right: 28px;
  bottom: 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  font-family: "Manrope", system-ui, sans-serif;
  pointer-events: none;
}

#journey-label {
  font-size: 15px;
  font-weight: 400;
  letter-spacing: 0.01em;
  color: rgba(242, 234, 216, 0.68);
  transition: opacity 1.2s ease;
}

#station-label {
  margin-top: 6px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255, 210, 140, 0.75);
  transition: opacity 1.2s ease;
}

#journey-label.is-hidden,
#station-label.is-hidden {
  opacity: 0;
}

.buttons {
  display: flex;
  flex-shrink: 0;
  gap: 10px;
}

.buttons {
  transition: opacity 0.8s ease;
}

body.is-idle {
  cursor: none;
}

body.is-idle .buttons {
  opacity: 0;
  pointer-events: none;
}

/* Quiet until reached for. */
.pill {
  padding: 9px 18px;
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: #f2ead8;
  background: rgba(9, 11, 24, 0.55);
  border: 1px solid rgba(242, 234, 216, 0.22);
  border-radius: 999px;
  cursor: pointer;
  pointer-events: auto;
  opacity: 0.55;
  transition:
    opacity 0.4s,
    border-color 0.4s;
}

.pill:hover,
.pill:focus-visible,
.pill[aria-expanded="true"] {
  opacity: 1;
  border-color: rgba(242, 234, 216, 0.5);
  outline: none;
}

/* Resting while the train is in a tunnel. */
#new-journey:disabled {
  opacity: 0.15;
  cursor: default;
}

/* On a phone the labels sit on their own line above the buttons. */
@media (max-width: 640px) {
  .chrome {
    left: 16px;
    right: 16px;
    bottom: 18px;
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  #journey-label {
    font-size: 14px;
  }
}

/* A phone on its side has little room under the rails, so everything
   shrinks to fit there. */
@media (max-height: 500px) {
  .chrome {
    bottom: 10px;
  }

  #journey-label {
    font-size: 12px;
  }

  #station-label {
    margin-top: 2px;
    font-size: 10px;
  }

  .pill {
    padding: 6px 12px;
    font-size: 11px;
  }
}

/* The same dark glass and cream as the buttons, with the station label's
   amber for whatever is chosen. */
.sound-control {
  position: relative;
}

.sound-panel {
  position: absolute;
  left: 0;
  bottom: calc(100% + 12px);
  width: 248px;
  display: grid;
  gap: 16px;
  padding: 16px 16px 12px;
  color: #f2ead8;
  background: rgba(9, 11, 24, 0.86);
  border: 1px solid rgba(242, 234, 216, 0.18);
  border-radius: 18px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(10px);
  pointer-events: auto;
  opacity: 0;
  transform: translateY(6px);
  visibility: hidden;
  transition:
    opacity 0.2s ease,
    transform 0.2s ease,
    visibility 0s 0.2s;
}

.sound-panel.is-open {
  opacity: 1;
  transform: none;
  visibility: visible;
  transition:
    opacity 0.2s ease,
    transform 0.2s ease;
}

.panel-row {
  display: grid;
  gap: 8px;
}

.panel-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(242, 234, 216, 0.55);
}

/* --fill is set from controls.js: how far the amber runs along the track. */
#volume {
  --fill: 100%;
  width: 100%;
  height: 18px;
  margin: 0;
  background: transparent;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
}

#volume::-webkit-slider-runnable-track {
  height: 4px;
  border-radius: 2px;
  background: linear-gradient(to right, #ffd28c var(--fill), rgba(242, 234, 216, 0.18) var(--fill));
}

#volume::-webkit-slider-thumb {
  width: 14px;
  height: 14px;
  margin-top: -5px;
  border-radius: 50%;
  background: #f2ead8;
  box-shadow: 0 0 0 4px rgba(255, 210, 140, 0.15);
  -webkit-appearance: none;
}

#volume::-moz-range-track {
  height: 4px;
  border-radius: 2px;
  background: rgba(242, 234, 216, 0.18);
}

#volume::-moz-range-progress {
  height: 4px;
  border-radius: 2px;
  background: #ffd28c;
}

#volume::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border: none;
  border-radius: 50%;
  background: #f2ead8;
}

#volume:focus-visible {
  outline: none;
}

#volume:focus-visible::-webkit-slider-thumb {
  box-shadow: 0 0 0 4px rgba(255, 210, 140, 0.5);
}

#volume:focus-visible::-moz-range-thumb {
  box-shadow: 0 0 0 4px rgba(255, 210, 140, 0.5);
}

.choices {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
}

.choices button {
  padding: 6px 0;
  font: inherit;
  font-size: 12px;
  font-weight: 600;
  color: rgba(242, 234, 216, 0.7);
  background: transparent;
  border: 1px solid rgba(242, 234, 216, 0.18);
  border-radius: 999px;
  cursor: pointer;
  transition:
    color 0.2s,
    border-color 0.2s,
    background 0.2s;
}

.choices button:hover,
.choices button:focus-visible {
  color: #f2ead8;
  border-color: rgba(242, 234, 216, 0.45);
  outline: none;
}

.choices button[aria-pressed="true"] {
  color: #ffd28c;
  background: rgba(255, 210, 140, 0.12);
  border-color: rgba(255, 210, 140, 0.55);
}

.panel-note {
  font-size: 12px;
  color: rgba(255, 210, 140, 0.75);
}

.panel-note:empty {
  display: none;
}

.panel-quiet {
  justify-self: start;
  padding: 2px 0;
  font: inherit;
  font-size: 12px;
  color: rgba(242, 234, 216, 0.5);
  background: none;
  border: none;
  cursor: pointer;
}

.panel-quiet:hover,
.panel-quiet:focus-visible {
  color: #f2ead8;
  text-decoration: underline;
  text-underline-offset: 3px;
  outline: none;
}

/* Comes up slowly and lifts quickly. */
.sleep-veil {
  position: fixed;
  inset: 0;
  background: #020309;
  opacity: 0;
  pointer-events: none;
  transition: opacity 1.5s ease;
}

.sleep-veil.is-asleep {
  opacity: 0.97;
  transition: opacity 30s ease-in;
}

/* The labels sit above the veil, so they fade out with it. */
.labels {
  transition: opacity 1.5s ease;
}

.sleep-veil.is-asleep ~ .chrome .labels {
  opacity: 0;
  transition: opacity 30s ease-in;
}

@media (prefers-reduced-motion: reduce) {
  #journey-label,
  #station-label,
  .pill,
  .buttons,
  .sound-panel {
    transition: none;
  }
}