:root {
  /* Material 3 Colors - Dark Theme */
  --md-sys-color-primary: #137fec;
  --md-sys-color-on-primary: #ffffff;
  --md-sys-color-primary-container: #d6e3ff;
  --md-sys-color-on-primary-container: #001b3d;
  --md-sys-color-surface: #101922;
  --md-sys-color-surface-dim: #111418;
  --md-sys-color-surface-container: #1e242b;
  --md-sys-color-surface-container-low: #191f26;
  --md-sys-color-surface-container-high: #283039;
  --md-sys-color-on-surface: #e2e2e6;
  --md-sys-color-on-surface-variant: #c4c7c5;
  --md-sys-color-outline: #8e918f;
  
  /* Elevation */
  --md-sys-elevation-1: 0 1px 2px 0 rgba(0,0,0,0.3), 0 1px 3px 1px rgba(0,0,0,0.15);
  --md-sys-elevation-2: 0 1px 2px 0 rgba(0,0,0,0.3), 0 2px 6px 2px rgba(0,0,0,0.15);
  --md-sys-elevation-3: 0 4px 8px 3px rgba(0,0,0,0.15), 0 1px 3px 0 rgba(0,0,0,0.3);

  /* Border Radius */
  --md-sys-shape-corner-none: 0;
  --md-sys-shape-corner-extra-small: 4px;
  --md-sys-shape-corner-small: 8px;
  --md-sys-shape-corner-medium: 12px;
  --md-sys-shape-corner-large: 16px;
  --md-sys-shape-corner-extra-large: 28px;
  --md-sys-shape-corner-full: 9999px;
}

html.dark {
  background-color: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
}

body {
  margin: 0;
  padding: 0;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  overflow: hidden;
  height: 100vh;
  width: 100vw;
}

/* Two-Layer System */
#layer-0 {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

#layer-1 {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
  display: flex;
  flex-direction: column;
}

#layer-1 > * {
  pointer-events: auto;
}

/* Common UI Components */
.m3-surface {
  background-color: var(--md-sys-color-surface-container);
  border-radius: var(--md-sys-shape-corner-medium);
  box-shadow: var(--md-sys-elevation-1);
}

.m3-chip {
  display: inline-flex;
  align-items: center;
  height: 32px;
  padding: 0 16px;
  border-radius: var(--md-sys-shape-corner-small);
  background-color: var(--md-sys-color-surface-container-high);
  color: var(--md-sys-color-on-surface);
  font-size: 14px;
  font-weight: 500;
  border: 1px solid var(--md-sys-color-outline);
  cursor: pointer;
  transition: background-color 0.2s;
}

.m3-chip:hover {
  background-color: var(--md-sys-color-surface-container);
}

.m3-chip.active {
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  border-color: transparent;
}