/* Model Modal Overlay - Split View Layout */

.model-overlay {
  position: fixed;
  top: var(--header-height, 48px);
  left: var(--sidebar-width, 250px);
  right: 0;
  bottom: 0;
  z-index: var(--z-modal, 1000);
  
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 0;
  
  background: var(--bg-color);
  opacity: 0;
  animation: modalOverlayFadeIn 0.25s ease-out forwards;
}

.model-overlay.sidebar-collapsed {
  left: var(--sidebar-collapsed-width, 60px);
  grid-template-columns: 1.3fr 0.7fr;
}

@keyframes modalOverlayFadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.model-overlay.closing {
  animation: modalOverlayFadeOut 0.2s ease-out forwards;
}

@keyframes modalOverlayFadeOut {
  from {
    opacity: 1;
  }
  to {
    opacity: 0;
  }
}

/* Close button */
.model-overlay__close {
  position: absolute;
  top: var(--space-2);
  right: var(--space-2);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.3);
  border: none;
  border-radius: 50%;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
  z-index: 10;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.model-overlay__close:hover {
  background: rgba(0, 0, 0, 0.5);
  transform: scale(1.05);
}

/* Keyboard shortcut hint */
.model-overlay__hint {
  position: absolute;
  top: var(--space-2);
  left: 50%;
  transform: translateX(-50%);
  padding: var(--space-1) var(--space-3);
  background: rgba(0, 0, 0, 0.7);
  color: white;
  font-size: 0.85em;
  border-radius: var(--border-radius-sm);
  opacity: 0;
  animation: hintFadeIn 0.3s ease-out 0.5s forwards, hintFadeOut 0.3s ease-out 3.5s forwards;
  z-index: 10;
  pointer-events: none;
  white-space: nowrap;
}

@keyframes hintFadeIn {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

@keyframes hintFadeOut {
  from {
    opacity: 1;
  }
  to {
    opacity: 0;
  }
}

.model-overlay__hint.hidden {
  display: none;
}

/* Responsive breakpoints */
@media (max-width: 1400px) {
  .model-overlay {
    grid-template-columns: 1fr 1fr;
  }
  
  .model-overlay.sidebar-collapsed {
    grid-template-columns: 1.1fr 0.9fr;
  }
}

@media (max-width: 1200px) {
  .model-overlay {
    grid-template-columns: 1fr 1fr;
  }
  
  .model-overlay.sidebar-collapsed {
    grid-template-columns: 1fr 1fr;
  }
}

/* Mobile: stack layout */
@media (max-width: 768px) {
  .model-overlay {
    left: 0;
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr;
    overflow-y: auto;
  }
  
  .model-overlay.sidebar-collapsed {
    left: 0;
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr;
  }
}

/* Body scroll lock when modal is open */
body.modal-open {
  overflow: hidden !important;
}

/* Transition effect for content when switching models */
.showcase.transitioning,
.metadata.transitioning {
  opacity: 0;
  transition: opacity 0.15s ease-out;
}