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

html,
body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #0a0a0a;
  touch-action: none;
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
}

#canvas-container {
  width: 100%;
  height: 100%;
}

#controls {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  z-index: 100;
}

.btn-row {
  display: flex;
  gap: 8px;
  padding: 6px;
  background: rgba(0, 0, 0, 0.4);
  border-radius: 20px;
  backdrop-filter: blur(12px);
}

.btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: transparent;
  color: rgba(255, 255, 255, 0.5);
  font-size: 13px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  -webkit-tap-highlight-color: transparent;
}

.btn:active {
  transform: scale(0.92);
  background: rgba(255, 255, 255, 0.08);
}

.btn.active {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.25);
  color: #fff;
}

.mode-selector {
  display: flex;
  gap: 4px;
  padding: 4px;
  background: rgba(0, 0, 0, 0.3);
  border-radius: 12px;
  backdrop-filter: blur(8px);
}

.mode-btn {
  padding: 6px 12px;
  border-radius: 8px;
  border: none;
  background: transparent;
  color: rgba(255, 255, 255, 0.4);
  font-size: 11px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.mode-btn.active {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
}

#sensor-overlay {
  position: fixed;
  top: 20px;
  left: 20px;
  right: 20px;
  z-index: 100;
  pointer-events: none;
}

#sensor-status {
  display: inline-block;
  /* padding: 8px 14px; */
  /* background: rgba(0,0,0,0.5); */
  backdrop-filter: blur(8px);
  border-radius: 8px;
  color: rgba(255, 255, 255, 0.6);
  font-size: 12px;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

#sensor-data {
  font-family: "SF Mono", Monaco, monospace;
  font-size: 11px;
  color: rgba(255, 255, 255, 0.4);
  line-height: 1.6;
  opacity: 0;
  transition: opacity 0.3s;
}

#sensor-data.active {
  opacity: 1;
}

#desktop-sensor-hint {
  display: none;
  margin-top: 8px;
  color: rgba(255, 255, 255, 0.55);
}

#desktop-sensor-hint.active {
  display: block;
}

#start-prompt {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(10px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 200;
  transition:
    opacity 0.4s,
    visibility 0.4s;
}

#start-prompt.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

#start-prompt h1 {
  color: #fff;
  font-size: 20px;
  font-weight: 500;
  margin-bottom: 12px;
  letter-spacing: 0.5px;
}

#start-prompt p {
  color: rgba(255, 255, 255, 0.5);
  font-size: 14px;
  margin-bottom: 28px;
  text-align: center;
  padding: 0 40px;
}

#start-btn {
  padding: 14px 32px;
  background: #fff;
  color: #000;
  border: none;
  border-radius: 24px;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition:
    transform 0.2s,
    opacity 0.2s;
}

#start-btn:active {
  transform: scale(0.96);
  opacity: 0.8;
}

#loading {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: rgba(255, 255, 255, 0.4);
  font-size: 13px;
  pointer-events: none;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.axis-label {
  display: inline-block;
  width: 14px;
  color: #ff6b6b;
}

.axis-label.y {
  color: #4ade80;
}
.axis-label.z {
  color: #60a5fa;
}

#model-source {
  position: fixed;
  bottom: 10px;
  left: 0;
  right: 0;
  text-align: center;
  font-size: 10px;
  color: rgba(255, 255, 255, 0.2);
  pointer-events: auto;
  z-index: 100;
}

#model-source a {
  color: rgba(255, 255, 255, 0.3);
  text-decoration: none;
  transition: color 0.2s;
}

#model-source a:hover {
  color: rgba(255, 255, 255, 0.5);
}

#repo-link {
  position: fixed;
  bottom: 14px;
  right: 14px;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: rgba(255, 255, 255, 0.35);
  text-decoration: none;
  transition:
    color 0.2s,
    opacity 0.2s;
  opacity: 0.7;
}

#repo-link:hover {
  color: rgba(255, 255, 255, 0.6);
  opacity: 1;
}

#repo-link svg {
  width: 20px;
  height: 20px;
  fill: #fff;
}