/* SmartVolt — Spacing, radii, shadows, motion
   Tight, gridded, engineered. 4px base unit. */
:root {
  /* Spacing scale (4px base) */
  --space-1: 0.25rem;   /* 4 */
  --space-2: 0.5rem;    /* 8 */
  --space-3: 0.75rem;   /* 12 */
  --space-4: 1rem;      /* 16 */
  --space-5: 1.5rem;    /* 24 */
  --space-6: 2rem;      /* 32 */
  --space-7: 3rem;      /* 48 */
  --space-8: 4rem;      /* 64 */
  --space-9: 6rem;      /* 96 */
  --space-10: 8rem;     /* 128 */

  /* Section rhythm */
  --section-pad-y: clamp(4rem, 9vw, 8rem);
  --container-max: 1200px;
  --container-pad: clamp(1.25rem, 4vw, 3rem);

  /* Radii — minimal, mostly sharp/engineering */
  --radius-none: 0;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;
  --radius-pill: 999px;

  /* Borders */
  --border-width: 1px;
  --border-width-thick: 2px;

  /* Shadows — restrained, dark-surface depth */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.6);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.6);
  --shadow-inset: inset 0 1px 0 rgba(255, 255, 255, 0.04);

  /* Motion */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1); /* @kind other */
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1); /* @kind other */
  --dur-fast: 140ms; /* @kind other */
  --dur-base: 240ms; /* @kind other */
  --dur-slow: 480ms; /* @kind other */
}