/* Application Layout */
.app-container {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto 1fr;
  grid-template-areas: 
    "header header"
    "main widgets";
  min-height: 100vh;
}

/* Loading Screen */
.loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--md-sys-color-background);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
  z-index: 9999;
}

.loading-screen h2 {
  font: var(--md-sys-typescale-headline-medium);
  color: var(--md-sys-color-primary);
}

/* Header */
.top-app-bar {
  grid-area: header;
  background-color: var(--md-sys-color-surface);
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  z-index: 100;
}

.top-app-bar-content {
  display: flex;
  align-items: center;
  padding: 8px 16px;
  height: 64px;
}

.app-title {
  font: var(--md-sys-typescale-title-large);
  color: var(--md-sys-color-on-surface);
  margin-left: 16px;
  flex: 1;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Navigation Drawer */
.navigation-drawer {
  position: fixed;
  top: 0;
  left: -320px;
  width: 320px;
  height: 100vh;
  background-color: var(--md-sys-color-surface);
  box-shadow: var(--md-sys-elevation-2);
  transition: left var(--md-sys-motion-duration-medium2) var(--md-sys-motion-easing-emphasized);
  z-index: 200;
  overflow-y: auto;
}

.navigation-drawer.open {
  left: 0;
}

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

.drawer-header h2 {
  font: var(--md-sys-typescale-title-large);
  color: var(--md-sys-color-on-surface);
}

.drawer-menu {
  list-style: none;
  padding: 8px 0;
}

.drawer-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  color: var(--md-sys-color-on-surface);
  text-decoration: none;
  transition: background-color var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
}

.drawer-item:hover {
  background-color: var(--md-sys-color-surface-variant);
}

.drawer-item.active {
  background-color: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
}

.drawer-divider {
  border: none;
  height: 1px;
  background-color: var(--md-sys-color-outline-variant);
  margin: 8px 16px;
}

/* Main Content */
.main-content {
  grid-area: main;
  padding: 24px;
  overflow-y: auto;
  position: relative;
}

/* Search Overlay */
.search-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 10vh;
  z-index: 1500;
}

.search-container {
  width: 100%;
  max-width: 600px;
  margin: 0 24px;
}

.search-input-container {
  display: flex;
  align-items: center;
  background-color: var(--md-sys-color-surface);
  border-radius: 28px;
  padding: 8px 16px;
  box-shadow: var(--md-sys-elevation-3);
  gap: 12px;
}

.search-input-container .material-symbols-outlined {
  color: var(--md-sys-color-on-surface-variant);
  font-size: 24px;
}

#search-input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font: var(--md-sys-typescale-body-large);
  color: var(--md-sys-color-on-surface);
  padding: 12px 0;
}

.search-results {
  background-color: var(--md-sys-color-surface);
  border-radius: 12px;
  margin-top: 8px;
  box-shadow: var(--md-sys-elevation-2);
  max-height: 60vh;
  overflow-y: auto;
}

.search-result-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  cursor: pointer;
  transition: background-color var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

.search-result-item:last-child {
  border-bottom: none;
}

.search-result-item:hover {
  background-color: var(--md-sys-color-surface-variant);
}

.search-result-favicon {
  width: 24px;
  height: 24px;
  border-radius: 4px;
  background-color: var(--md-sys-color-surface-variant);
}

.search-result-content {
  flex: 1;
}

.search-result-title {
  font: var(--md-sys-typescale-body-medium);
  color: var(--md-sys-color-on-surface);
  font-weight: 500;
}

.search-result-url {
  font: var(--md-sys-typescale-body-small);
  color: var(--md-sys-color-on-surface-variant);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Collections */
.collections-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.collection {
  background-color: var(--md-sys-color-surface);
  border-radius: 16px;
  box-shadow: var(--md-sys-elevation-1);
  overflow: hidden;
  transition: all var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
}

.collection:hover {
  box-shadow: var(--md-sys-elevation-2);
}

.collection-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

.collection-title {
  font: var(--md-sys-typescale-title-medium);
  color: var(--md-sys-color-on-surface);
  flex: 1;
}

.collection-actions {
  display: flex;
  gap: 4px;
}

.collection-color {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  margin-right: 8px;
}

.collection-bookmarks {
  padding: 8px;
  min-height: 100px;
}

.bookmark-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px;
  border-radius: 8px;
  cursor: pointer;
  transition: background-color var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
  margin-bottom: 4px;
  user-select: none;
}

.bookmark-item:hover {
  background-color: var(--md-sys-color-surface-variant);
}

.bookmark-item.dragging {
  opacity: 0.5;
  transform: rotate(5deg);
}

.bookmark-favicon {
  width: 20px;
  height: 20px;
  border-radius: 4px;
  background-color: var(--md-sys-color-surface-variant);
  flex-shrink: 0;
}

.bookmark-content {
  flex: 1;
  min-width: 0;
}

.bookmark-title {
  font: var(--md-sys-typescale-body-medium);
  color: var(--md-sys-color-on-surface);
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.bookmark-url {
  font: var(--md-sys-typescale-body-small);
  color: var(--md-sys-color-on-surface-variant);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.bookmark-actions {
  display: flex;
  gap: 4px;
  opacity: 0;
  transition: opacity var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
}

.bookmark-item:hover .bookmark-actions {
  opacity: 1;
}

/* Drag and Drop */
.collection.drag-over {
  background-color: var(--md-sys-color-primary-container);
  border: 2px dashed var(--md-sys-color-primary);
}

.drop-zone {
  min-height: 60px;
  border: 2px dashed var(--md-sys-color-outline-variant);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--md-sys-color-on-surface-variant);
  font: var(--md-sys-typescale-body-small);
  margin: 8px;
  transition: all var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
}

.drop-zone.active {
  border-color: var(--md-sys-color-primary);
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
}

/* Empty State */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 48px 24px;
  color: var(--md-sys-color-on-surface-variant);
}

.empty-state .material-symbols-outlined {
  font-size: 64px;
  margin-bottom: 16px;
  opacity: 0.6;
}

.empty-state h2 {
  font: var(--md-sys-typescale-headline-small);
  margin-bottom: 8px;
}

.empty-state p {
  font: var(--md-sys-typescale-body-large);
  margin-bottom: 24px;
}

/* Widget Panel */
.widget-panel {
  grid-area: widgets;
  width: 320px;
  background-color: var(--md-sys-color-surface);
  border-left: 1px solid var(--md-sys-color-outline-variant);
  overflow-y: auto;
}

.widget-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

.widget-panel-header h3 {
  font: var(--md-sys-typescale-title-medium);
  color: var(--md-sys-color-on-surface);
}

.widgets-container {
  padding: 16px;
}

.widget {
  background-color: var(--md-sys-color-surface-variant);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 16px;
  box-shadow: var(--md-sys-elevation-1);
}

.widget-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.widget-title {
  font: var(--md-sys-typescale-title-small);
  color: var(--md-sys-color-on-surface-variant);
}

.widget-content {
  color: var(--md-sys-color-on-surface-variant);
}

/* Responsive Design Helpers */
@media (max-width: 768px) {
  .app-container {
    grid-template-columns: 1fr;
    grid-template-areas: 
      "header"
      "main";
  }
  
  .widget-panel {
    display: none;
  }
  
  .collections-container {
    grid-template-columns: 1fr;
  }
  
  .main-content {
    padding: 16px;
  }
  
  .fab {
    bottom: 16px;
    right: 16px;
  }
}

/* Widget selection dialog */
.widget-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 16px;
  margin: 24px 0;
}

.widget-option {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 20px 16px;
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: 12px;
  cursor: pointer;
  transition: all var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
  text-align: center;
}

.widget-option:hover {
  background-color: var(--md-sys-color-surface-variant);
  border-color: var(--md-sys-color-primary);
}

.widget-option .material-symbols-outlined {
  font-size: 32px;
  color: var(--md-sys-color-primary);
}

.widget-option span:last-child {
  font: var(--md-sys-typescale-body-small);
  color: var(--md-sys-color-on-surface);
}
.fade-in {
  animation: fadeIn var(--md-sys-motion-duration-medium2) var(--md-sys-motion-easing-standard);
}

.slide-up {
  animation: slideUp var(--md-sys-motion-duration-medium2) var(--md-sys-motion-easing-emphasized);
}

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

@keyframes slideUp {
  from { 
    opacity: 0;
    transform: translateY(20px);
  }
  to { 
    opacity: 1;
    transform: translateY(0);
  }
}

/* Context Menu */
.context-menu {
  position: fixed;
  background-color: var(--md-sys-color-surface);
  border-radius: 4px;
  box-shadow: var(--md-sys-elevation-3);
  padding: 4px 0;
  min-width: 150px;
  z-index: 1000;
}

.context-menu-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 16px;
  cursor: pointer;
  font: var(--md-sys-typescale-body-medium);
  color: var(--md-sys-color-on-surface);
  transition: background-color var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
}

.context-menu-item:hover {
  background-color: var(--md-sys-color-surface-variant);
}

.context-menu-item.danger {
  color: var(--md-sys-color-error);
}

.context-menu-item.danger:hover {
  background-color: var(--md-sys-color-error-container);
  color: var(--md-sys-color-on-error-container);
}