/* Utility classes */
.hidden { display: none !important; }
.visible { display: block !important; }
.flex-hidden { display: none !important; }
.flex-visible { display: flex !important; }

/* Phase chip utilities */
.phase-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  transition: all 0.15s ease;
  border: 1px solid transparent;
  background: #f1f5f9;
  color: #64748b;
  cursor: pointer;
}

.phase-chip.active {
  background: #3b82f6;
  color: #ffffff;
  box-shadow: 0 1px 3px rgba(59, 130, 246, 0.5);
}

.phase-chip.pending {
  background: #fbbf24;
  color: #92400e;
  border-color: #f59e0b;
}

/* Drawer utilities */
.drawer-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 40;
}

.detail-drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 28rem;
  background: #ffffff;
  border-left: 1px solid #e5e7eb;
  box-shadow: -10px 0 25px rgba(0, 0, 0, 0.15);
  transform: translateX(100%);
  transition: transform 0.3s ease;
  z-index: 50;
  display: flex;
  flex-direction: column;
}

.detail-drawer.open {
  transform: translateX(0);
}

.drawer-overlay.visible {
  display: block;
}

/* Timeline utilities */
.timeline-item {
  position: relative;
  padding-left: 2rem;
  padding-bottom: 1rem;
  border-left: 2px solid #e5e7eb;
  margin-left: 0.5rem;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -0.375rem;
  top: 0.125rem;
  width: 0.75rem;
  height: 0.75rem;
  background: #3b82f6;
  border-radius: 50%;
  border: 2px solid #ffffff;
  box-shadow: 0 0 0 2px #e5e7eb;
}

.timeline-item:last-child {
  border-left: none;
}

/* Accessibility: Focus ring */
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid #3b82f6;
  outline-offset: 2px;
}