:root {
  color-scheme: light;
  font-family: "Avenir Next", "Trebuchet MS", "Segoe UI", sans-serif;
  --sky-top: #aee6ff;
  --sky-bottom: #eefbff;
  --ink: #1e3f68;
  --muted-ink: rgba(30, 63, 104, 0.72);
  --panel-bg: rgba(248, 252, 255, 0.86);
  --panel-border: rgba(50, 93, 147, 0.16);
  --panel-shadow: 0 14px 30px rgba(29, 71, 120, 0.13);
  --button-blue-start: #1d7ee7;
  --button-blue-end: #56b9ff;
  --button-red-start: #f34848;
  --button-red-end: #ff8d55;
  --button-yellow-start: #ffce2e;
  --button-yellow-end: #ffa24c;
  --toy-green: #47c95b;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
  min-height: 100vh;
  overflow: hidden;
  background: linear-gradient(180deg, var(--sky-top), var(--sky-bottom));
}

body {
  color: var(--ink);
}

.app-shell {
  position: relative;
  width: 100vw;
  height: 100vh;
  min-height: 100vh;
  background: linear-gradient(180deg, var(--sky-top), var(--sky-bottom));
}

.scene-canvas {
  display: block;
  width: 100%;
  height: 100vh;
  background: linear-gradient(180deg, var(--sky-top), var(--sky-bottom));
}

.webgl-fallback {
  position: absolute;
  inset: auto 24px 24px auto;
  max-width: 340px;
  border-radius: 16px;
  padding: 16px 18px;
  color: #ffffff;
  background: rgba(30, 63, 104, 0.92);
  box-shadow: 0 18px 40px rgba(29, 71, 120, 0.28);
  font-weight: 700;
  line-height: 1.35;
}

.hud-panel {
  position: absolute;
  top: 12px;
  left: 12px;
  width: min(252px, calc(100vw - 24px));
  max-height: calc(100vh - 24px);
  display: grid;
  pointer-events: none;
}

.hud-toggle {
  display: none;
}

.control-card {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  padding: 10px;
  max-height: calc(100vh - 24px);
  overflow: auto;
  pointer-events: auto;
  box-shadow: var(--panel-shadow);
  backdrop-filter: blur(18px);
}

.control-card--primary {
  display: grid;
  gap: 10px;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  max-width: 9.8rem;
  font-size: 1.05rem;
  line-height: 1.05;
}

h2 {
  margin-bottom: 7px;
  font-size: 0.72rem;
  letter-spacing: 0;
  text-transform: uppercase;
}

.heading-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: start;
  gap: 8px;
}

.status-strip {
  display: flex;
  gap: 6px;
  justify-self: end;
}

.status-pill {
  min-width: 66px;
  padding: 6px 8px;
  border-radius: 11px;
  background: rgba(255, 255, 255, 0.58);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.75);
}

.route-pill {
  flex: 0 0 auto;
}

.route-pill strong {
  display: block;
  font-size: 0.74rem;
  line-height: 1.15;
}

.status-label {
  display: block;
  font-size: 0.56rem;
  letter-spacing: 0;
  text-transform: uppercase;
  color: #668cb5;
}

.control-group + .control-group {
  padding-top: 8px;
  border-top: 1px solid rgba(50, 93, 147, 0.12);
}

.slider-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.82rem;
}

.slider-row + input[type="range"] {
  margin-top: 12px;
}

input[type="range"] {
  width: 100%;
  margin-top: 7px;
  accent-color: #f34848;
}

.button-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.button-grid--actions {
  margin-top: 8px;
}

.pov-controls {
  display: none;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 7px;
  margin-top: 8px;
}

.hud-panel.is-pov .pov-controls {
  display: grid;
}

.pov-controls button {
  min-height: 32px;
  padding-inline: 7px;
  color: #d8f7ff;
  background: linear-gradient(135deg, #08233f, #145fc4);
  box-shadow: inset 0 0 0 1px rgba(216, 247, 255, 0.18), 0 10px 20px rgba(8, 35, 63, 0.18);
}

.button-wide {
  grid-column: 1 / -1;
}

button {
  border: 0;
  border-radius: 10px;
  padding: 7px 9px;
  font: inherit;
  font-weight: 700;
  font-size: 0.78rem;
  color: #ffffff;
  cursor: pointer;
  background: linear-gradient(135deg, var(--button-blue-start), var(--button-blue-end));
  box-shadow: 0 12px 24px rgba(26, 118, 217, 0.22);
  transition:
    transform 140ms ease,
    filter 140ms ease,
    box-shadow 140ms ease;
}

.mode-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 7px;
}

.mode-button {
  min-height: 34px;
  color: #1e3f68;
  background: rgba(255, 255, 255, 0.72);
  box-shadow: inset 0 0 0 1px rgba(50, 93, 147, 0.14);
}

.mode-button.is-active {
  color: #ffffff;
  background: linear-gradient(135deg, #1976e8, #47c95b);
  box-shadow: 0 10px 20px rgba(25, 118, 232, 0.2);
}

.mode-button--wide {
  grid-column: 1 / -1;
  position: relative;
  overflow: hidden;
  --auto-tour-progress: 0deg;
}

.mode-button--wide.is-active {
  color: #654509;
  background: linear-gradient(135deg, #ffdc6c, #ffa24c);
  box-shadow: 0 10px 20px rgba(255, 194, 84, 0.24);
}

.mode-button--wide::after {
  content: "";
  position: absolute;
  inset: 2px;
  border-radius: 8px;
  padding: 2px;
  pointer-events: none;
  opacity: 0;
  background: conic-gradient(
    from -90deg,
    rgba(25, 118, 232, 0.9) var(--auto-tour-progress),
    rgba(255, 255, 255, 0.36) 0deg
  );
  -webkit-mask:
    linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  transition: opacity 160ms ease;
}

.mode-button--wide.is-active::after {
  opacity: 1;
}

.hud-panel.is-mode-spring .mode-button:not(.mode-button--wide).is-active {
  background: linear-gradient(135deg, #ff73b8, #47c95b);
}

.hud-panel.is-mode-autumn .mode-button:not(.mode-button--wide).is-active {
  background: linear-gradient(135deg, #ffce2e, #ef4343);
}

.hud-panel.is-mode-winter .mode-button:not(.mode-button--wide).is-active {
  background: linear-gradient(135deg, #ef4343, #47c95b);
}

.hud-panel.is-mode-night .mode-button:not(.mode-button--wide).is-active {
  background: linear-gradient(135deg, #18355e, #5aaaf8);
}

.hud-panel.is-mode-golden .mode-button:not(.mode-button--wide).is-active {
  background: linear-gradient(135deg, #ffce2e, #ff8d55);
}

button:hover {
  transform: translateY(-1px);
  filter: brightness(1.04);
}

button:active,
button.is-active {
  transform: translateY(0);
  box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.2);
  filter: saturate(1.12);
}

button.accent-red {
  background: linear-gradient(135deg, var(--button-red-start), var(--button-red-end));
  box-shadow: 0 12px 24px rgba(243, 72, 72, 0.22);
}

button.accent-blue {
  background: linear-gradient(135deg, #145fc4, #56b9ff);
  box-shadow: 0 12px 24px rgba(25, 118, 232, 0.24);
}

button.accent-yellow {
  color: #624403;
  background: linear-gradient(135deg, var(--button-yellow-start), var(--button-yellow-end));
  box-shadow: 0 12px 24px rgba(255, 212, 90, 0.24);
}

@media (max-width: 720px) {
  .hud-panel {
    width: min(300px, calc(100vw - 18px));
    top: 9px;
    left: 9px;
    gap: 8px;
  }

  .hud-toggle {
    display: inline-flex;
    width: max-content;
    min-height: 42px;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    padding: 10px 16px;
    color: #ffffff;
    background: linear-gradient(135deg, var(--button-red-start), var(--button-blue-end));
    pointer-events: auto;
  }

  .hud-panel.is-collapsed .control-card {
    display: none;
  }

  h1 {
    font-size: 1.08rem;
  }
}