/* ═══════════════════════════════════════════════
   SIGNAL CARDS — Priority-bordered action cards
   with sparkline trends and CTA buttons
═══════════════════════════════════════════════ */

/* ─── Base Card ─── */
.signal-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  position: relative;
  margin-bottom: 12px;
  transition: border-color 0.12s ease;
}
.signal-card:hover {
  border-color: var(--border-strong);
}

/* ─── Priority Borders ─── */
.signal-card.priority-p1 { border-left-color: var(--critical); }
.signal-card.priority-p2 { border-left-color: var(--warning); }
.signal-card.priority-p3 { border-left-color: #7A9AB8; }
.signal-card.priority-p4 { border-left-color: var(--border-strong); }
.signal-card.priority-p5 { border-left-color: var(--border-strong); }

/* ─── Priority Badge (text label for accessibility) ─── */
.signal-priority {
  display: inline-flex;
  align-items: center;
  font-size: 10px;
  font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
  border-radius: 4px;
  padding: 2px 6px;
  margin-right: 8px;
}
.signal-card.priority-p1 .signal-priority {
  background: var(--critical-subtle);
  color: var(--critical);
}
.signal-card.priority-p2 .signal-priority {
  background: var(--warning-subtle);
  color: var(--warning);
}
.signal-card.priority-p3 .signal-priority {
  background: rgba(122, 154, 184, 0.1);
  color: #7A9AB8;
}

/* ─── Card Header ─── */
.signal-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 6px;
}
.signal-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.4;
}

/* ─── Signal Age (top-right) ─── */
.signal-age {
  font-size: 10px;
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-tertiary);
  white-space: nowrap;
  flex-shrink: 0;
}

/* ─── Signal Meta (project name below title) ─── */
.signal-meta {
  font-size: 11px;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

/* ─── Consequence Annotation ─── */
.signal-consequence {
  font-size: 12px;
  color: var(--text-secondary);
  font-style: italic;
  margin-bottom: 10px;
  padding-left: 10px;
  border-left: 2px solid var(--border);
}

/* ─── Sparkline Container ─── */
.signal-sparkline {
  display: inline-block;
  width: 64px;
  height: 24px;
  vertical-align: middle;
  margin-right: 8px;
}
.signal-sparkline svg {
  width: 64px;
  height: 24px;
  display: block;
}

/* ─── CTA Row ─── */
.signal-cta-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--border-subtle);
}
.signal-cta-row .btn-ghost,
.signal-cta-row .btn-outline,
.signal-cta-row .btn-primary {
  font-size: 11px;
  height: 28px;
  padding: 4px 10px;
}

/* ─── Signal Card Grid (for Act page layout) ─── */
.signal-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
@media (min-width: 768px) {
  .signal-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* ─── Empty State ─── */
.signal-empty {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-tertiary);
  font-size: 13px;
}
.signal-empty svg {
  margin-bottom: 12px;
  opacity: 0.4;
}