/* Aurelius Design System — spacing, radii, rules, shadows, motion
   GROUND TRUTH: uploads/aurelius-styleguide.html. */

:root {
  /* Spacing (deck uses a tight 4px-ish rhythm) */
  --au-s1: 4px; --au-s2: 8px; --au-s3: 12px; --au-s4: 16px;
  --au-s5: 24px; --au-s6: 32px; --au-s7: 48px; --au-s8: 64px;

  /* Legacy aliases */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;

  /* Radii — chrome is square-cut; pills/chips are full rounds;
     photo cards 14px; diagram panels 16px; dashed groups 10px */
  --radius-sm: 2px;
  --radius-md: 14px;
  --radius-lg: 16px;
  --radius-group: 10px;
  --radius-pill: 999px;

  /* Borders */
  --border-hairline: 1px solid var(--hairline);
  --border-rule: 1px solid var(--au-black);      /* full-width page rules */
  --border-accent: 1px dashed var(--au-red);     /* dashed signal rule */
  --border-group: 1px dashed #83847E; /* @kind other */            /* diagram group border */

  /* Shadows — the brand is flat; depth comes from stacked ghost layers,
     not shadows. Use these only for true overlays. */
  --shadow-card: none; /* @kind shadow */
  --shadow-overlay: 0 8px 32px rgba(0, 0, 0, 0.28);

  /* Motion — restrained: opacity/transform fades, no bounces */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1); /* @kind other */
  --duration-fast: 120ms; /* @kind other */
  --duration-base: 200ms; /* @kind other */
  --duration-slow: 360ms; /* @kind other */
}