/* Layout: App Shell, Sidebar, Topbar, Responsive Views */
.app {
  display: flex;
  height: 100vh;
  width: 100vw;
  overflow: hidden;
  position: relative;
}

/* Sidebar */
.sidebar {
  width: 290px;
  min-width: 290px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 20;
  transition: transform var(--transition), width var(--transition);
}

.sidebar-header {
  padding: 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--text-primary);
  user-select: none;
}

.logo-icon {
  width: 32px;
  height: 32px;
  object-fit: contain;
  filter: drop-shadow(0 2px 8px var(--accent-glow));
}

.logo-badge {
  font-size: 10px;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-subtle);
  border: 1px solid rgba(108, 92, 231, 0.3);
  padding: 2px 6px;
  border-radius: var(--radius-xs);
  font-family: var(--font-mono);
  text-transform: uppercase;
}

.sidebar-scroll {
  flex: 1;
  overflow-y: auto;
  padding: 14px 12px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Vault Mode Switcher Tabs */
.vault-switcher {
  display: flex;
  background: var(--bg-tertiary);
  padding: 3px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.vault-tab {
  flex: 1;
  padding: 7px 10px;
  font-size: 12.5px;
  font-weight: 600;
  text-align: center;
  border-radius: 6px;
  color: var(--text-secondary);
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.vault-tab.active {
  background: var(--bg-card);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

.vault-tab:hover:not(.active) {
  color: var(--text-primary);
}

/* Nav Section */
.nav-section {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.nav-section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 10.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.1px;
  color: var(--text-muted);
  padding: 6px 10px 4px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  color: var(--text-secondary);
  transition: var(--transition-fast);
  position: relative;
  user-select: none;
}

.nav-item:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.nav-item.active {
  background: var(--accent-subtle);
  color: var(--accent-hover);
  font-weight: 500;
}

.nav-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 18px;
  background: var(--accent);
  border-radius: 0 3px 3px 0;
}

.nav-item svg {
  width: 17px;
  height: 17px;
  flex-shrink: 0;
  opacity: 0.8;
}

.nav-item.active svg {
  opacity: 1;
  color: var(--accent);
}

.nav-item .count {
  margin-left: auto;
  font-size: 11px;
  font-family: var(--font-mono);
  background: var(--bg-tertiary);
  padding: 2px 7px;
  border-radius: 6px;
  color: var(--text-muted);
}

.nav-item.active .count {
  background: rgba(108, 92, 231, 0.2);
  color: var(--accent);
}

/* Folders List */
.folder-item {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 7px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: var(--text-secondary);
  transition: var(--transition-fast);
  position: relative;
  user-select: none;
}

.folder-item:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.folder-item.active {
  background: var(--accent-subtle);
  color: var(--accent-hover);
  font-weight: 500;
}

.folder-color-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  flex-shrink: 0;
}

.folder-actions {
  display: none;
  gap: 3px;
  margin-left: auto;
}

.folder-item:hover .folder-actions {
  display: flex;
}

.folder-item:hover .count {
  display: none;
}

.folder-action-btn {
  color: var(--text-muted);
  padding: 3px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}

.folder-action-btn:hover {
  color: var(--text-primary);
  background: var(--bg-card);
}

.folder-action-btn.delete:hover {
  color: var(--red);
}

.folder-action-btn svg {
  width: 13px;
  height: 13px;
}

.add-folder-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 12.5px;
  color: var(--text-muted);
  border: 1px dashed var(--border);
  margin-top: 4px;
  transition: var(--transition-fast);
  width: 100%;
}

.add-folder-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-subtle);
}

/* Tags Cloud in Sidebar */
.tags-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  padding: 4px 6px;
}

.tag-chip {
  font-size: 11px;
  padding: 3px 8px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-secondary);
  transition: var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.tag-chip:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
}

.tag-chip.active {
  background: var(--accent-subtle);
  border-color: var(--accent);
  color: var(--accent-hover);
}

/* Sidebar Footer */
.sidebar-footer {
  padding: 12px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--bg-secondary);
}

.sidebar-btn {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: var(--text-secondary);
  transition: var(--transition-fast);
  width: 100%;
}

.sidebar-btn:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.sidebar-btn.btn-accent {
  background: linear-gradient(135deg, var(--accent), #8b5cf6);
  color: #ffffff;
  font-weight: 500;
  box-shadow: 0 2px 10px var(--accent-glow);
}

.sidebar-btn.btn-accent:hover {
  box-shadow: 0 4px 16px var(--accent-glow);
  transform: translateY(-1px);
}

.clean-slate-btn {
  color: var(--red);
  background: var(--red-subtle);
  border: 1px solid rgba(255, 85, 114, 0.2);
}

.clean-slate-btn:hover {
  background: rgba(255, 85, 114, 0.25);
  color: #ff7089;
}

/* Main Area */
.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
  background: var(--bg-primary);
}

/* Topbar */
.topbar {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 28px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  z-index: 10;
}

.search-wrapper {
  flex: 1;
  max-width: 580px;
  position: relative;
  display: flex;
  align-items: center;
}

.search-wrapper svg.search-icon {
  position: absolute;
  left: 14px;
  width: 17px;
  height: 17px;
  color: var(--text-muted);
  pointer-events: none;
}

.search-input {
  width: 100%;
  padding: 9px 80px 9px 40px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-size: 13.5px;
  outline: none;
  transition: var(--transition-fast);
}

.search-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
  background: var(--bg-secondary);
}

.search-wrapper .kbd-shortcut {
  position: absolute;
  right: 12px;
  font-size: 10.5px;
  font-family: var(--font-mono);
  padding: 2px 7px;
  border-radius: 4px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-muted);
  pointer-events: none;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
}

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  transition: var(--transition-fast);
}

.icon-btn:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
  background: var(--bg-card-hover);
}

.icon-btn.active {
  background: var(--accent-subtle);
  border-color: var(--accent);
  color: var(--accent-hover);
}

.view-modes {
  display: flex;
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  padding: 3px;
  border: 1px solid var(--border);
}

.view-mode-btn {
  padding: 6px 9px;
  border-radius: 5px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}

.view-mode-btn:hover {
  color: var(--text-primary);
}

.view-mode-btn.active {
  background: var(--bg-card);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

.btn-primary {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 8px 16px;
  background: var(--accent);
  color: #ffffff;
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 500;
  transition: var(--transition-fast);
  white-space: nowrap;
}

.btn-primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 4px 14px var(--accent-glow);
  transform: translateY(-1px);
}

/* Content Area */
.content-area {
  flex: 1;
  overflow-y: auto;
  padding: 24px 28px 48px;
  position: relative;
}

.content-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 20px;
  gap: 16px;
}

.content-title-group h1 {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.4px;
  color: var(--text-primary);
}

.content-title-group p {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 3px;
}

.content-meta-stats {
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--text-muted);
  background: var(--bg-tertiary);
  padding: 4px 10px;
  border-radius: 6px;
  border: 1px solid var(--border);
}

/* Filter Pills Bar */
.filter-pills-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 14px;
  margin-bottom: 18px;
  scrollbar-width: none;
}

.filter-pills-bar::-webkit-scrollbar {
  display: none;
}

.filter-pill {
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  white-space: nowrap;
  transition: var(--transition-fast);
  cursor: pointer;
}

.filter-pill:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
}

.filter-pill.active {
  background: var(--accent-subtle);
  border-color: var(--accent);
  color: var(--accent-hover);
  font-weight: 600;
}

/* Mobile Bottom Navigation Dock */
.mobile-nav-dock {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  z-index: 50;
  padding: 0 16px;
  justify-content: space-around;
  align-items: center;
}

.mobile-nav-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  font-size: 11px;
  color: var(--text-secondary);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
}

.mobile-nav-btn.active {
  color: var(--accent-hover);
}

.mobile-nav-btn svg {
  width: 20px;
  height: 20px;
}

/* Responsive Breakpoints */
@media (max-width: 860px) {
  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    transform: translateX(-100%);
    box-shadow: var(--shadow-lg);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .mobile-nav-dock {
    display: flex;
  }

  .content-area {
    padding: 16px 16px 80px;
  }

  .topbar {
    padding: 12px 16px;
  }
}