/* css/components/state-machine.css — TinkyTown state-machine diagram styles
 * Phase 3 P3.T2. Brand: Fraunces (titles) + General Sans (labels) +
 * var(--surface-deep) var(--amber) var(--green) var(--green-soft).
 * All colours via var() — no raw hex.
 */

.sm-wrap {
  margin: 0;
  padding: 18px 20px 20px;
  background: var(--surface-deep, #0d0b10);
  border: 1px solid color-mix(in srgb, var(--amber, #e8a33d) 22%, transparent);
  border-radius: 14px;
  overflow-x: auto;            /* long chains scroll horizontally on mobile */
}

.sm-title {
  font-family: 'Fraunces', Georgia, serif;
  font-size: 17px;
  font-weight: 600;
  margin: 0 0 12px;
  color: var(--text-primary, #f4f1ea);
  letter-spacing: -0.005em;
}

.sm-svg {
  display: block;
  font-family: 'General Sans', system-ui, sans-serif;
}

/* ── Nodes ─────────────────────────────────────────────────────────── */
.sm-node-bg {
  fill: color-mix(in srgb, var(--amber, #e8a33d) 8%, transparent);
  stroke: color-mix(in srgb, var(--amber, #e8a33d) 45%, transparent);
  stroke-width: 1.25;
  transition: stroke 140ms ease, fill 140ms ease;
}
.sm-node:hover .sm-node-bg {
  stroke: var(--amber, #e8a33d);
  fill: color-mix(in srgb, var(--amber, #e8a33d) 14%, transparent);
}

.sm-node-label {
  fill: var(--text-primary, #f4f1ea);
  font-size: 13px;
  font-weight: 500;
  pointer-events: none;        /* let hover hit the rect, not the text */
}

/* Start / end node accents — green pair, low saturation so amber still
 * leads visually. Phase 4 may add danger/error kinds. */
.sm-node-start .sm-node-bg {
  fill: color-mix(in srgb, var(--green-soft, #4ade80) 12%, transparent);
  stroke: color-mix(in srgb, var(--green, #22c55e) 55%, transparent);
}
.sm-node-end .sm-node-bg {
  fill: color-mix(in srgb, var(--green, #22c55e) 16%, transparent);
  stroke: var(--green, #22c55e);
}

/* ── Edges ─────────────────────────────────────────────────────────── */
.sm-edge-line {
  stroke: color-mix(in srgb, var(--amber, #e8a33d) 55%, transparent);
  stroke-width: 1.5;
  fill: none;
}

.sm-arrowhead {
  fill: color-mix(in srgb, var(--amber, #e8a33d) 75%, transparent);
}

.sm-edge-label {
  fill: var(--text-muted, #b0a89a);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.02em;
}

/* ── Empty / placeholder state (Automation Rules) ──────────────────── */
.sm-empty {
  padding: 48px 24px;
  text-align: center;
  background: var(--surface-deep, #0d0b10);
  border: 1px dashed color-mix(in srgb, var(--amber, #e8a33d) 35%, transparent);
  border-radius: 14px;
  color: var(--text-muted, #b0a89a);
  font-family: 'General Sans', system-ui, sans-serif;
}
.sm-empty-title {
  font-family: 'Fraunces', Georgia, serif;
  font-size: 18px;
  color: var(--text-primary, #f4f1ea);
  margin: 0 0 6px;
}
.sm-empty-body { font-size: 13px; line-height: 1.5; margin: 0; }