.app-header {
  height: 56px;
  background-color: var(--surface-color);
  padding: 0 1.5rem;
  border-bottom: 1px solid var(--border-color);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-sizing: border-box;
}

.app-header h1 {
  font-size: 1.3rem;
  color: var(--primary-color);
}

.header-actions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.container {
  display: grid;
  grid-template-columns: 55% 45%;
  gap: 1.25rem;
  padding: 1rem;
  max-width: 1600px;
  height: calc(100vh - 56px);
  margin: 0 auto;
  box-sizing: border-box;
}

@media (max-width: 1024px) {

  html,
  body {
    overflow: auto;
    height: auto;
  }

  .container {
    grid-template-columns: 1fr;
    height: auto;
  }
}

details.card-accordion {
  background: var(--surface-color);
  border-radius: 12px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
  border: 1px solid var(--border-color);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

#add-accordion {
  position: sticky;
  top: 0;
  z-index: 10;
}

details.list-accordion {
  flex-shrink: 0;
}

summary.accordion-header {
  padding: 0.75rem 1rem;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  background-color: var(--surface-color);
  user-select: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  list-style: none;
}

summary.accordion-header::-webkit-details-marker {
  display: none;
}

summary.accordion-header::after {
  content: '▼';
  font-size: 0.8rem;
  color: var(--text-muted);
  transition: transform 0.2s ease;
}

details[open] summary.accordion-header::after {
  transform: rotate(180deg);
}

.accordion-body {
  padding: 0.75rem 1rem 1rem 1rem;
  border-top: 1px solid var(--border-color);
}

.list-accordion .accordion-body {
  padding: 0.5rem 1rem 1rem 1rem;
}