html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: #ffffff;
  color: #000000;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
}

#viewer,
canvas {
  width: 100%;
  height: 100%;
}

canvas {
  display: block;
  touch-action: none;
}

#settings {
  position: fixed;
  top: max(16px, env(safe-area-inset-top));
  left: 16px;
  z-index: 4;
  width: min(320px, calc(100vw - 32px));
  color: #f6f7f8;
  font-size: 13px;
}

#settings[hidden] {
  display: none;
}

#settings,
#settings input,
#settings button {
  font: inherit;
}

#settings-toggle {
  width: 100%;
  min-height: 36px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 6px;
  color: inherit;
  background: rgba(18, 20, 22, 0.82);
  cursor: pointer;
  backdrop-filter: blur(10px);
}

#settings-body {
  display: grid;
  gap: 12px;
  margin-top: 8px;
  padding: 12px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 6px;
  background: rgba(18, 20, 22, 0.82);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.28);
  box-sizing: border-box;
  backdrop-filter: blur(10px);
}

#settings.is-collapsed #settings-body {
  display: none;
}

#settings fieldset {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  border: 0;
}

#settings legend,
.control > span,
.axis-grid span {
  color: rgba(246, 247, 248, 0.72);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.control {
  display: grid;
  grid-template-columns: 64px 1fr;
  align-items: center;
  gap: 10px;
}

.color-control input {
  width: 100%;
  height: 34px;
  padding: 2px;
}

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

.axis-grid label {
  display: grid;
  gap: 5px;
}

#settings input {
  min-width: 0;
  height: 34px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 5px;
  padding: 0 8px;
  box-sizing: border-box;
  color: #ffffff;
  background: rgba(255, 255, 255, 0.08);
}

#settings input[type="color"] {
  cursor: pointer;
}

.settings-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.settings-actions button {
  min-height: 34px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 5px;
  color: #ffffff;
  background: rgba(255, 255, 255, 0.09);
  cursor: pointer;
}

.settings-actions button:hover,
#settings-toggle:hover {
  background: rgba(255, 255, 255, 0.15);
}

#loading {
  position: fixed;
  left: 50%;
  bottom: max(32px, env(safe-area-inset-bottom));
  z-index: 3;
  display: grid;
  gap: 10px;
  width: min(380px, calc(100vw - 32px));
  padding: 16px;
  box-sizing: border-box;
  transform: translateX(-50%);
}

#loading-text {
  color: #fff;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.2;
  text-align: center;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.65);
}

#loading-bar {
  height: 10px;
  overflow: hidden;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.22);
  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.28);
}

#loading-progress {
  width: 0%;
  height: 100%;
  border-radius: inherit;
  background: #ffaf50;
  transition: width 160ms ease-out;
}

#loading[hidden] {
  display: none;
}

@media (max-width: 520px) {
  #settings {
    top: max(10px, env(safe-area-inset-top));
    left: 10px;
    width: calc(100vw - 20px);
  }

  #settings-body {
    max-height: calc(100vh - 88px);
    overflow: auto;
  }
}