/* ============================================
   Function Menu - WeChat Style
   ============================================ */

/* ---- Menu Container ---- */
.function-menu {
  position: fixed;
  inset: 0;
  z-index: var(--z-overlay);
  opacity: 0;
  visibility: hidden;
  transition: opacity 200ms ease, visibility 200ms ease;
}

.function-menu.show {
  opacity: 1;
  visibility: visible;
}

/* ---- Menu Overlay (backdrop) ---- */
.function-menu-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
}

/* ---- Menu Content ---- */
.function-menu-content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  max-width: var(--app-max-width);
  margin: 0 auto;
  background: var(--bg-card);
  border-radius: 12px 12px 0 0;
  padding-bottom: var(--safe-bottom);
  transform: translateY(100%);
  transition: transform 300ms cubic-bezier(0.32, 0.72, 0, 1);
  max-height: 60vh;
  overflow-y: auto;
}

.function-menu.show .function-menu-content {
  transform: translateY(0);
}

/* ---- Menu Header ---- */
.function-menu-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px 10px;
  border-bottom: 1px solid var(--color-gray-200);
}

.function-menu-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-gray-900);
}

.function-menu-close {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: var(--color-gray-500);
  font-size: 18px;
}

.function-menu-close:active {
  background: var(--color-gray-100);
}

/* ---- Menu Grid ---- */
.function-menu-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px;
  padding: 16px 20px;
}

/* ---- Menu Item ---- */
.function-menu-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 10px 4px;
  border-radius: 8px;
  -webkit-tap-highlight-color: transparent;
}

.function-menu-item:active {
  background: var(--color-gray-100);
}

.function-menu-item-icon {
  width: 50px;
  height: 50px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

/* Item Icon Colors */
.function-menu-item-icon.icon-search { background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%); }
.function-menu-item-icon.icon-ai { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); }
.function-menu-item-icon.icon-image { background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%); }
.function-menu-item-icon.icon-clear { background: linear-gradient(135deg, #ff6b6b 0%, #ffa07a 100%); }
.function-menu-item-icon.icon-file { background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%); }
.function-menu-item-icon.icon-settings { background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%); }
.function-menu-item-icon.icon-default { background: linear-gradient(135deg, #89f7fe 0%, #66a6ff 100%); }

.function-menu-item-title {
  font-size: 11px;
  color: var(--color-gray-700);
  text-align: center;
  line-height: 1.2;
  font-weight: 500;
}

.function-menu-item-content {
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* ---- Management Section ---- */
.function-menu-section-title {
  padding: 8px 20px 4px;
  font-size: 11px;
  color: var(--color-gray-500);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ---- Menu Scrollbar ---- */
.function-menu-content::-webkit-scrollbar { width: 0; background: transparent; }

/* ============================================
   Search Modal
   ============================================ */

.search-modal {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  display: none;
  opacity: 0;
  transition: opacity 200ms ease;
}

.search-modal.show {
  display: flex;
  opacity: 1;
}

.search-modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
}

.search-modal-content {
  position: relative;
  width: 100%;
  max-width: 600px;
  height: 100%;
  max-height: 80vh;
  margin: auto;
  background: var(--bg-card);
  border-radius: 12px 12px 0 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: translateY(100%);
  animation: slideUp 300ms cubic-bezier(0.32, 0.72, 0, 1) forwards;
}

/* Search Header */
.search-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--color-gray-200);
}

.search-input-container {
  flex: 1;
  position: relative;
  display: flex;
  align-items: center;
}

.search-input {
  width: 100%;
  padding: 10px 40px 10px 14px;
  border: 1px solid var(--color-gray-200);
  border-radius: 20px;
  background: var(--color-gray-50);
  font-size: 16px;
  transition: border-color 150ms ease;
}

.search-input:focus {
  background: var(--color-white);
  border-color: var(--color-primary);
}

.search-clear-btn {
  position: absolute;
  right: 12px;
  color: var(--color-gray-500);
  padding: 4px;
  border-radius: var(--radius-full);
  transition: background var(--duration-fast) var(--ease-default);
}

.search-clear-btn:hover { background: var(--color-gray-100); }

.search-close-btn {
  color: var(--color-gray-600);
  padding: var(--space-2);
  border-radius: var(--radius-md);
  transition: background var(--duration-fast) var(--ease-default);
}

.search-close-btn:hover { background: var(--color-gray-100); }

/* Search Filters */
.search-filters {
  padding: var(--space-3) var(--space-5);
  background: var(--color-gray-50);
  border-bottom: 1px solid var(--color-gray-200);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
  max-height: 52px;
  overflow: hidden;
  transition: max-height var(--duration-slow) var(--ease-default);
}

.search-filters.expanded { max-height: 200px; }

.search-filter-group {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.search-filter-group label {
  font-size: var(--text-sm);
  color: var(--color-gray-600);
  white-space: nowrap;
}

.search-filter-group select {
  padding: 5px var(--space-3);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  background: var(--color-white);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: border-color var(--duration-fast) var(--ease-default);
}

.search-filter-group select:focus { border-color: var(--color-primary); }

.search-filter-toggle {
  margin-left: auto;
  background: var(--color-primary);
  color: white;
  padding: 6px var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  display: flex;
  align-items: center;
  gap: 4px;
  transition: background var(--duration-fast) var(--ease-default);
}

.search-filter-toggle:hover { background: var(--color-primary-dark); }

.toggle-icon {
  font-size: var(--text-xs);
  transition: transform var(--duration-fast) var(--ease-default);
}

.search-filters.expanded .toggle-icon { transform: rotate(180deg); }

/* Search Suggestions */
.search-suggestions {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-gray-200);
  max-height: 200px;
  overflow-y: auto;
}

.suggestions-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-3) var(--space-5);
  background: var(--color-gray-50);
  border-bottom: 1px solid var(--color-gray-200);
  font-size: var(--text-sm);
  color: var(--color-gray-600);
}

.clear-history-btn {
  color: var(--color-primary);
  font-size: var(--text-sm);
  padding: 4px var(--space-2);
  border-radius: var(--radius-xs);
  transition: background var(--duration-fast) var(--ease-default);
}

.clear-history-btn:hover { background: var(--color-primary-50); }

.suggestion-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-default);
}

.suggestion-item:hover { background: var(--color-gray-50); }

.suggestion-icon { font-size: var(--text-md); color: var(--color-gray-500); }
.suggestion-text { flex: 1; font-size: var(--text-base); color: var(--color-gray-900); }

/* Search Results */
.search-results {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.search-status {
  padding: var(--space-10) var(--space-5);
  text-align: center;
}

.search-welcome {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
}

.search-welcome-icon { font-size: 3rem; opacity: 0.5; }
.search-welcome-text { font-size: var(--text-lg); color: var(--color-gray-900); }
.search-welcome-tips { color: var(--color-gray-600); font-size: var(--text-sm); line-height: var(--leading-relaxed); }

.search-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
}

.search-loading .loading-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--color-gray-200);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.loading-text { font-size: var(--text-md); color: var(--color-gray-600); }

.search-error {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
}

.error-icon { font-size: 3rem; }
.error-text { font-size: var(--text-md); color: var(--color-danger); text-align: center; }

.retry-btn {
  background: var(--color-primary);
  color: white;
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  transition: background var(--duration-fast) var(--ease-default);
}

.retry-btn:hover { background: var(--color-primary-dark); }

/* Result Items */
.search-results-list { flex: 1; overflow-y: auto; }

.search-results-stats {
  padding: var(--space-3) var(--space-5);
  background: var(--color-gray-50);
  border-bottom: 1px solid var(--color-gray-200);
  font-size: var(--text-sm);
  color: var(--color-gray-600);
  text-align: center;
}

.search-result-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-gray-100);
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-default);
}

.search-result-item:hover { background: var(--color-gray-50); }

.result-icon { font-size: var(--text-xl); margin-top: 2px; flex-shrink: 0; }
.result-content { flex: 1; min-width: 0; }

.result-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-2);
}

.result-type-info { display: flex; align-items: center; gap: var(--space-2); }

.result-type-tag {
  padding: 2px var(--space-2);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
}

.result-type-tag.file { background: #e3f2fd; color: #1976d2; }
.result-type-tag.ai-response { background: #ede7f6; color: #7c4dff; }
.result-type-tag.ai-thinking { background: var(--color-gray-100); color: var(--color-gray-600); }

.file-size { font-size: var(--text-xs); color: var(--color-gray-500); }
.result-time { font-size: var(--text-xs); color: var(--color-gray-500); }
.result-text { font-size: var(--text-base); color: var(--color-gray-900); line-height: var(--leading-normal); margin-bottom: 4px; word-break: break-word; }
.result-filename { font-size: var(--text-sm); color: var(--color-gray-600); font-style: italic; }

.result-locate-btn {
  border: 1px solid var(--color-gray-200);
  color: var(--color-gray-600);
  padding: var(--space-2);
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease-default);
}

.result-locate-btn:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
}

.search-highlight {
  background: rgba(255, 235, 59, 0.5);
  color: var(--color-gray-900);
  padding: 1px 2px;
  border-radius: 2px;
  font-weight: var(--font-medium);
}

/* No Results */
.search-no-results {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-10) var(--space-5);
}

.no-results-icon { font-size: 3rem; opacity: 0.5; }
.no-results-text { font-size: var(--text-lg); color: var(--color-gray-900); }
.no-results-tips { font-size: var(--text-sm); color: var(--color-gray-600); text-align: center; }

/* Load More */
.search-load-more { padding: var(--space-5); text-align: center; border-top: 1px solid var(--color-gray-200); }

.load-more-btn {
  background: var(--color-primary);
  color: white;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-2xl);
  font-size: var(--text-sm);
  transition: background var(--duration-fast) var(--ease-default);
}

.load-more-btn:hover { background: var(--color-primary-dark); }

/* Message Highlight */
.message-highlight {
  background: var(--color-warning-bg) !important;
  border: 2px solid var(--color-warning) !important;
  animation: highlightPulse 2s var(--ease-default);
}

@keyframes highlightPulse {
  0%, 100% { box-shadow: 0 0 0 rgba(255, 193, 7, 0.3); }
  50% { box-shadow: 0 0 16px rgba(255, 193, 7, 0.5); }
}

/* ============================================
   Image Generation Modal
   ============================================ */

.image-gen-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  padding: 20px;
}

.image-gen-modal {
  background: var(--bg-card);
  border-radius: 12px;
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  animation: modalSlideIn 250ms ease;
}

@keyframes modalSlideIn {
  from { opacity: 0; transform: translateY(-16px); }
  to { opacity: 1; transform: translateY(0); }
}

.image-gen-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 16px 0;
  border-bottom: 1px solid var(--color-gray-100);
  margin-bottom: 16px;
}

.image-gen-header h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-gray-900);
}

.close-btn {
  font-size: 22px;
  color: var(--color-gray-500);
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

.close-btn:active { background: var(--color-gray-100); }

.image-gen-content { padding: 0 16px; }

.form-group { margin-bottom: 16px; }

.form-group label {
  display: block;
  margin-bottom: 6px;
  font-weight: 500;
  color: var(--color-gray-900);
  font-size: 13px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--color-gray-300);
  border-radius: 6px;
  font-size: 14px;
  transition: border-color 150ms ease;
  background: var(--color-white);
  font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--color-primary);
}

.form-group textarea { resize: vertical; min-height: 80px; }

.char-count { text-align: right; font-size: 11px; color: var(--color-gray-500); margin-top: 4px; }

.form-row { display: flex; gap: 12px; }
.form-row .form-group { flex: 1; }

/* Range slider */
input[type="range"] {
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--color-gray-300);
  -webkit-appearance: none;
  appearance: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-primary);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}

input[type="range"]::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-primary);
  border: none;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}

.range-labels {
  display: flex;
  justify-content: space-between;
  font-size: var(--text-xs);
  color: var(--color-gray-600);
  margin-top: 4px;
}

.image-gen-footer {
  display: flex;
  gap: 10px;
  padding: 16px;
  border-top: 1px solid var(--color-gray-100);
  margin-top: 16px;
}

.image-gen-footer button {
  flex: 1;
  padding: 10px 16px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
}

.btn-cancel { background: var(--color-gray-100); color: var(--color-gray-700); }
.btn-cancel:active { background: var(--color-gray-200); }

.btn-generate { background: var(--color-primary); color: white; }
.btn-generate:active { opacity: 0.85; }
.btn-generate:disabled { background: var(--color-gray-300); cursor: not-allowed; }

/* Generating Status */
.generating-status { margin: var(--space-3) 0; }

.generating-message {
  background: linear-gradient(135deg, #f8f9ff 0%, #f0f4ff 100%);
  border: 1px solid #e1e8ff;
  border-radius: var(--radius-lg);
  padding: var(--space-4);
}

.generating-header { display: flex; align-items: center; margin-bottom: var(--space-3); }
.generating-indicator { font-size: var(--text-sm); font-weight: var(--font-medium); color: var(--color-accent); }
.generating-prompt { font-size: var(--text-sm); color: var(--color-gray-600); margin-bottom: var(--space-3); line-height: var(--leading-normal); }
.generating-prompt strong { color: var(--color-gray-900); }

.generating-progress { margin-top: var(--space-3); }

.generating-progress .progress-bar {
  width: 100%;
  height: 4px;
  background: #e0e8ff;
  border-radius: 2px;
  overflow: hidden;
}

.generating-progress .progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-accent), var(--color-primary));
  border-radius: 2px;
  animation: progressAnimation 2s var(--ease-default) infinite;
}

@keyframes progressAnimation {
  0% { width: 0%; opacity: 0.8; }
  50% { width: 70%; opacity: 1; }
  100% { width: 100%; opacity: 0.8; }
}

/* ---- Dark Mode Overrides ---- */
@media (prefers-color-scheme: dark) {
  .result-type-tag.file { background: rgba(25, 118, 210, 0.2); color: #64b5f6; }
  .result-type-tag.ai-response { background: rgba(124, 77, 255, 0.2); color: #b388ff; }

  .generating-message {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    border-color: #2a2a4a;
  }

  .generating-progress .progress-bar {
    background: #2a2a4a;
  }

  .search-input {
    background: var(--bg-input);
    color: var(--color-gray-900);
  }
}