.app-container {
  max-width: 600px;
  margin: 0 auto;
  padding: var(--space-md);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.screen {
  display: none;
  flex-direction: column;
  flex: 1;
}

.screen--active {
  display: flex;
}

.screen__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) 0;
  gap: var(--space-md);
}

.screen__title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
}

.screen__content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.screen__footer {
  padding: var(--space-md) 0;
  display: flex;
  gap: var(--space-sm);
}

/* Responsive */
@media (min-width: 768px) {
  .app-container {
    padding: var(--space-xl);
  }
}

@media (min-width: 1024px) {
  .app-container {
    max-width: 720px;
  }
}