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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: #0d0d12;
  color: #fff;
  height: 100vh;
  overflow: hidden;
}

#viewer-container {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
}

/* Toolbar */
#toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: linear-gradient(to bottom, #2a1f3d, #14101e);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  flex-shrink: 0;
  flex-wrap: wrap;
}

.toolbar-group {
  display: flex;
  align-items: center;
  gap: 4px;
  position: relative;
}

.toolbar-divider {
  width: 1px;
  height: 24px;
  background: rgba(255, 255, 255, 0.2);
  margin: 0 4px;
}

.toolbar-spacer {
  flex: 1;
}

.toolbar-label {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.6);
  margin-right: 4px;
}

#toolbar button,
#toolbar select {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: #fff;
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  transition: all 0.2s ease;
  white-space: nowrap;
  font-family: inherit;
}

#toolbar select {
  padding: 5px 8px;
  font-size: 13px;
}

#toolbar button:hover:not(:disabled),
#toolbar select:hover:not(:disabled) {
  background: rgba(168, 100, 255, 0.3);
  border-color: #a864ff;
}

#toolbar button:active:not(:disabled) {
  transform: scale(0.95);
}

#toolbar button:disabled,
#toolbar select:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

#toolbar button.active {
  background: rgba(168, 100, 255, 0.4);
  border-color: #a864ff;
  box-shadow: 0 0 8px rgba(168, 100, 255, 0.4);
}

/* Dropdown */
.dropdown {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  background: #1f1730;
  border: 1px solid rgba(168, 100, 255, 0.4);
  border-radius: 8px;
  padding: 4px;
  min-width: 180px;
  display: none;
  z-index: 100;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
}

.dropdown-menu.open {
  display: block;
}

.dropdown-menu button {
  display: block;
  width: 100%;
  text-align: left;
  background: transparent;
  border: 1px solid transparent;
  padding: 8px 12px;
  border-radius: 4px;
  margin: 0;
}

.dropdown-menu button:hover:not(:disabled) {
  background: rgba(168, 100, 255, 0.3);
  border-color: transparent;
}

#model-info {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 360px;
}

/* Drop zone */
#drop-zone {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  border: 3px dashed rgba(255, 255, 255, 0.2);
  border-radius: 16px;
  margin: 20px;
  transition: all 0.3s ease;
}

#drop-zone.active {
  display: flex;
}

#drop-zone.drag-over {
  border-color: #a864ff;
  background: rgba(168, 100, 255, 0.1);
}

.drop-content {
  text-align: center;
  padding: 40px;
}

.drop-content .icon {
  font-size: 80px;
  display: inline-block;
  margin-bottom: 20px;
  animation: spin 8s linear infinite;
  filter: drop-shadow(0 0 20px rgba(168, 100, 255, 0.4));
}

@keyframes spin {
  from {
    transform: rotateY(0);
  }
  to {
    transform: rotateY(360deg);
  }
}

.drop-content h2 {
  font-size: 28px;
  font-weight: 600;
  margin-bottom: 12px;
  background: linear-gradient(90deg, #a864ff, #f06aff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.drop-content p {
  color: rgba(255, 255, 255, 0.6);
  font-size: 16px;
  margin-bottom: 8px;
}

.drop-content .formats {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.4);
}

/* Model wrapper */
#model-wrapper {
  flex: 1;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(ellipse at center, #1a1430 0%, #0a0612 70%, #050308 100%);
}

#model-wrapper.hidden {
  display: none;
}

#model {
  width: 100%;
  height: 100%;
  --poster-color: transparent;
  background: transparent;
}

/* Loading overlay */
#loading-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(10, 6, 18, 0.7);
  backdrop-filter: blur(4px);
  z-index: 5;
}

#loading-overlay.hidden {
  display: none;
}

.spinner {
  width: 48px;
  height: 48px;
  border: 4px solid rgba(168, 100, 255, 0.2);
  border-top-color: #a864ff;
  border-radius: 50%;
  animation: rotate 0.9s linear infinite;
}

@keyframes rotate {
  to {
    transform: rotate(360deg);
  }
}

.loading-text {
  margin-top: 16px;
  color: rgba(255, 255, 255, 0.8);
  font-size: 14px;
}

/* Error toast */
.error-toast {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(180, 40, 60, 0.95);
  color: #fff;
  padding: 10px 16px;
  border-radius: 8px;
  font-size: 14px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
  z-index: 10;
  max-width: 80%;
}