/* ============================================================
   Shift Voice — Spacing, Radii, Shadows, Borders, Motion
   The system is calm and industrial: generous rounding (12–24px),
   soft low-contrast shadows, hairline navy borders, and a signature
   blueprint grid background.
   ============================================================ */

:root {
  /* ---- Spacing scale (4px base) ---- */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;   /* section rhythm + grid cell size */

  /* ---- Radii (rounded, friendly, never sharp) ---- */
  --radius-sm: 8px;     /* inputs, small chips */
  --radius-md: 12px;    /* dense cards, dashboard tiles */
  --radius-lg: 16px;    /* buttons, panels */
  --radius-xl: 20px;    /* feature cards */
  --radius-2xl: 24px;   /* hero cards, modals */
  --radius-pill: 999px; /* badges, tags, mic button */

  /* ---- Shadows (warm-neutral, low contrast) ---- */
  --shadow-xs: 0 1px 2px rgba(18, 35, 44, 0.06);
  --shadow-sm: 0 1px 3px rgba(18, 35, 44, 0.08);
  --shadow-md: 0 3px 14px rgba(18, 35, 44, 0.09);
  --shadow-lg: 0 10px 30px rgba(18, 35, 44, 0.12);
  --shadow-xl: 0 20px 45px rgba(18, 35, 44, 0.16);
  --shadow-focus: 0 0 0 2px rgba(15, 95, 104, 0.14); /* teal focus ring */

  /* ---- Borders ---- */
  --border-hairline: 1px solid var(--sv-navy-a12);
  --border-accent-1: 1px solid var(--sv-teal-a25);

  /* ---- Blueprint grid background (the signature texture) ---- */
  --grid-line: rgba(18, 35, 44, 0.04);
  --grid-size: 80px;
  --blueprint-bg:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);

  /* ---- Motion ---- */
  --ease-standard: cubic-bezier(0.4, 0, 0.2, 1); /* @kind other */
  --dur-fast: 150ms; /* @kind other */
  --dur-base: 200ms; /* @kind other */
  --dur-slow: 300ms; /* @kind other */

  /* ---- Layout ---- */
  --container-max: 1200px;
  --container-pad: 40px;
}

/* Utility: apply the blueprint grid to any full-bleed surface. */
.sv-blueprint {
  background-color: var(--surface-page);
  background-image: var(--blueprint-bg);
  background-size: var(--grid-size) var(--grid-size);
}