:root {
  /* Border radius (minimal, geometric) */
  --radius-none: 0; /* @kind radius */
  --radius-sm: 2px; /* @kind radius */
  --radius-md: 4px; /* @kind radius */
  --radius-pill: 999px; /* @kind radius */
  --radius-button: 16px; /* @kind radius */
  
  /* Animation/transition */
  --duration-fast: 200ms; /* @kind other */
  --duration-normal: 400ms; /* @kind other */
  --duration-slow: 800ms; /* @kind other */
  --duration-reveal: 900ms; /* @kind other */
  --stagger-step: 90ms; /* @kind other */
  
  --easing-standard: cubic-bezier(0.4, 0, 0.2, 1); /* @kind other */
  --easing-decelerate: cubic-bezier(0.16, 1, 0.3, 1); /* @kind other */
  --easing-accelerate: cubic-bezier(0.4, 0, 1, 1); /* @kind other */
  
  /* Shadows — light theme: soft black; overridden for dark theme below since black shadows vanish on black bg */
  --shadow-sm: 0 1px 2px rgba(20, 20, 26, 0.06); /* @kind shadow */
  --shadow-md: 0 4px 10px rgba(20, 20, 26, 0.10); /* @kind shadow */
  --shadow-lg: 0 10px 24px rgba(20, 20, 26, 0.14); /* @kind shadow */
  --shadow-card: 0 1px 2px rgba(20, 20, 26, 0.05); /* @kind shadow */
  --shadow-card-hover: 0 16px 32px -12px rgba(20, 20, 26, 0.22), 0 2px 6px rgba(20, 20, 26, 0.08); /* @kind shadow */
  
  /* Z-index scale */
  --z-dropdown: 100; /* @kind other */
  --z-sticky: 200; /* @kind other */
  --z-fixed: 300; /* @kind other */
  --z-modal-bg: 400; /* @kind other */
  --z-modal: 500; /* @kind other */
}

[data-theme="dark"] {
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 10px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 10px 24px rgba(0, 0, 0, 0.6);
  --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-card-hover: 0 0 0 1px rgba(255, 255, 255, 0.08), 0 16px 32px -12px rgba(0, 0, 0, 0.7), 0 0 24px rgba(255, 255, 255, 0.04);
}