/* ─────────────────────────────────────────────────────────────
   .ds-canvas — DRAWING question primitive (Studio Strip)
   Two modes via [data-mode]:
   - "signature": 4:1 aspect, no toolbar, header row with prompt + clear + status
   - "drawing":   4:3 aspect, full toolbar (sizes / colors / undo + clear / grid)
   ───────────────────────────────────────────────────────────── */

.ds-canvas {
  background: var(--surface-base);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* ─── toolbar ─────────────────────────────────────────────── */
.ds-canvas__toolbar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: var(--surface-base);
  border-bottom: 1px solid var(--border-subtle);
  flex-wrap: wrap;
}

.ds-canvas__group {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: 0 var(--space-1);
}
.ds-canvas__group + .ds-canvas__group {
  border-left: 1px solid var(--border-subtle);
}

.ds-canvas__tool {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 0;
  cursor: pointer;
  color: var(--text-secondary);
  transition: background var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out);
}
.ds-canvas__tool:hover {
  background: var(--surface-active);
  color: var(--text-primary);
}
.ds-canvas__tool:focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: 2px;
}
.ds-canvas__tool--active {
  background: var(--accent-primary);
  color: var(--text-on-accent);
}

/* dot tokens for size selector */
.ds-canvas__dot {
  background: var(--text-primary);
  border-radius: var(--radius-full);
}
.ds-canvas__dot--xs { width: 5px; height: 5px; }
.ds-canvas__dot--sm { width: 9px; height: 9px; }
.ds-canvas__dot--lg { width: 14px; height: 14px; }
.ds-canvas__tool--active .ds-canvas__dot { background: var(--text-on-accent); }

/* swatch tokens for color selector */
.ds-canvas__swatch {
  width: 22px;
  height: 22px;
  border-radius: var(--radius-full);
  border: 1.5px solid var(--border-default);
  box-shadow: inset 0 0 0 2px var(--surface-base);
}
.ds-canvas__swatch--black { background: #18182a; }
.ds-canvas__swatch--red   { background: #c0392b; }
.ds-canvas__swatch--blue  { background: #2256d8; }
.ds-canvas__tool--active .ds-canvas__swatch {
  box-shadow: inset 0 0 0 2px var(--accent-primary), 0 0 0 2px var(--text-on-accent);
}

/* ─── status pill ─────────────────────────────────────────── */
.ds-canvas__status {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  padding: 4px 10px 4px 8px;
  border-radius: var(--radius-full);
  font-weight: var(--weight-semibold);
  font-family: var(--font-body-admin);
}
.ds-canvas__status .material-symbols-rounded { font-size: 14px; }

.ds-canvas__status[data-state="idle"]   { display: none; }
.ds-canvas__status[data-state="saving"] {
  color: var(--accent-primary);
  background: var(--accent-muted);
}
.ds-canvas__status[data-state="saved"]  {
  color: var(--status-success);
  background: var(--status-success-bg);
}

/* ─── canvas surface ──────────────────────────────────────── */
.ds-canvas__pad {
  position: relative;
  background: var(--surface-base);
  width: 100%;
  flex: 1;
}
.ds-canvas[data-mode="drawing"] .ds-canvas__pad   { aspect-ratio: 4 / 3; min-height: 240px; }
.ds-canvas[data-mode="signature"] .ds-canvas__pad { aspect-ratio: 4 / 1; min-height: 96px; }

.ds-canvas__pad canvas {
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
  cursor: crosshair;
}

.ds-canvas__grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right,  rgba(20,22,40,0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(20,22,40,0.05) 1px, transparent 1px);
  background-size: 32px 32px;
}

/* ─── signature-mode header (no toolbar, just clear + status) ── */
.ds-canvas__sig-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) var(--space-3);
  background: var(--surface-base);
  border-bottom: 1px solid var(--border-subtle);
  font-family: var(--font-display);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--text-tertiary);
  font-weight: var(--weight-semibold);
}
.ds-canvas__sig-header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* ─── responsive: bigger hit targets on small screens ─────── */
@media (max-width: 768px) {
  .ds-canvas__tool { width: 44px; height: 44px; }
}