/* ============================================================
   Tierra Firme — Spacing, Radius, Shadow, Layout, Motion
   ============================================================ */

: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:  2.5rem;   /* 40 */
  --space-8:  3rem;     /* 48 */
  --space-9:  4rem;     /* 64 */
  --space-10: 5rem;     /* 80 */
  --space-12: 7rem;     /* 112 */

  /* ---- Radius — gentle, hand-made (never pill-perfect) ---- */
  --radius-xs: 2px;
  --radius-sm: 4px;
  --radius-md: 7px;     /* default control radius */
  --radius-lg: 12px;
  --radius-xl: 18px;
  --radius-2xl: 28px;
  --radius-full: 999px;

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

  /* ---- Shadows — warm, low, grounded (cast in stone, not glow) ---- */
  --shadow-xs: 0 1px 2px rgba(45, 44, 42, 0.08);
  --shadow-sm: 0 1px 3px rgba(45, 44, 42, 0.10), 0 1px 2px rgba(45, 44, 42, 0.06);
  --shadow-md: 0 4px 10px rgba(45, 44, 42, 0.10), 0 2px 4px rgba(45, 44, 42, 0.06);
  --shadow-lg: 0 12px 28px rgba(45, 44, 42, 0.14), 0 4px 10px rgba(45, 44, 42, 0.07);
  --shadow-xl: 0 24px 50px rgba(45, 44, 42, 0.18);
  --shadow-inset: inset 0 1px 2px rgba(45, 44, 42, 0.10);

  /* ---- Layout ---- */
  --container-sm: 640px;
  --container-md: 820px;
  --container-lg: 1080px;
  --container-xl: 1280px;
  --gutter: var(--space-5);

  /* ---- Motion — calm, earthy, no bounce ---- */
  --ease-standard: cubic-bezier(0.22, 0.61, 0.36, 1); /* @kind other */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1); /* @kind other */
  --ease-in: cubic-bezier(0.4, 0, 1, 1); /* @kind other */
  --duration-fast: 120ms; /* @kind other */
  --duration-base: 200ms; /* @kind other */
  --duration-slow: 360ms; /* @kind other */
}