:root {
  /* Brand */
  --color-primary: #14B8A6;
  --color-primary-hover: #0D9488;
  --color-primary-light: rgba(20, 184, 166, 0.15);

  /* Card accents (from CardModel.swift) */
  --color-proactive: #3B82F6;
  --color-adhoc: #F97316;
  --color-error: #EF4444;

  /* Speaker colors (from TranscriptLine.Speaker) */
  --color-remote: #3B82F6;
  --color-local: #F97316;
  --color-offline: #A855F7;

  /* Dark backgrounds */
  --color-dark-bg: #0A0A0C;
  --color-dark-surface: #1C1C1E;
  --color-dark-card: #2C2C2E;
  --color-dark-border: rgba(255, 255, 255, 0.08);

  /* Light backgrounds */
  --color-light-bg: #F5F5F7;
  --color-light-surface: #FFFFFF;
  --color-light-border: rgba(0, 0, 0, 0.08);

  /* Text */
  --color-text-primary: #F5F5F7;
  --color-text-secondary: rgba(245, 245, 247, 0.7);
  --color-text-tertiary: rgba(245, 245, 247, 0.5);
  --color-text-dark-primary: #1D1D1F;
  --color-text-dark-secondary: rgba(29, 29, 31, 0.7);
  --color-text-dark-tertiary: rgba(29, 29, 31, 0.5);

  /* Typography — system font stack */
  --font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'SF Mono', SFMono-Regular, ui-monospace, Menlo, monospace;

  /* Font sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 2rem;
  --text-4xl: 2.75rem;
  --text-5xl: 3.5rem;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Layout (from LayoutConstants.swift) */
  --hud-width: 340px;
  --card-radius: 10px;
  --card-padding: 12px;

  /* Misc */
  --nav-height: 64px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
  --shadow-glow: 0 0 20px rgba(20, 184, 166, 0.3);

  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
}