/* ARC — Spacing, radii, shadows, motion
 * ARC leans architectural: tight radii, crisp edges, angular chevrons.
 * Cards are nearly square-cornered; shadows are restrained and cool. */

:root {
  /* Spacing scale (4px base) */
  --space-0: 0;
  --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 */

  /* Radii — ARC stays crisp. Default cards use a small radius. */
  --radius-none: 0;
  --radius-xs: 2px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 10px;
  --radius-pill: 999px;
  --radius-card: var(--radius-md);

  /* Borders */
  --border-width: 1px;
  --border-width-strong: 2px;
  --rule-accent: 3px;  /* the short blue rule under headings */

  /* Shadows — cool, navy-tinted, never warm */
  --shadow-xs: 0 1px 2px rgba(0,10,31,0.06);
  --shadow-sm: 0 2px 6px rgba(0,10,31,0.08);
  --shadow-md: 0 6px 18px rgba(0,10,31,0.10);
  --shadow-lg: 0 16px 40px rgba(0,10,31,0.16);
  --shadow-focus: 0 0 0 3px var(--focus-ring);

  /* Motion — quick, professional, no bounce */
  --ease-standard: cubic-bezier(0.2, 0, 0.2, 1);  /* @kind other */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);      /* @kind other */
  --dur-fast: 120ms;  /* @kind other */
  --dur-base: 200ms;  /* @kind other */
  --dur-slow: 320ms;  /* @kind other */

  /* The signature skew used for chevron / parallelogram accents */
  --skew: -12deg;  /* @kind other */

  /* Layout */
  --container-max: 1200px;
  --container-wide: 1400px;
}