/* Hamburger menu button in header */
.hamburger-menu {
  background: none;
  border: none;
  color: white;
  cursor: pointer;
  padding: var(--spacing-sm);
  border-radius: var(--border-radius-small);
  transition: background var(--transition-fast);
  margin-right: var(--spacing-md);
}

.hamburger-menu:hover {
  background: rgba(255, 255, 255, 0.1);
}

.hamburger-menu svg {
  width: var(--spacing-xxl);
  height: var(--spacing-xxl);
  stroke: currentColor;
}

/* Sidebar container */
.sidebar {
  position: fixed;
  top: 0;
  left: 0; /* Start open by default */
  width: var(--sidebar-width-large);
  height: 100vh;
  background: var(--white);
  border-right: 1px solid var(--light-gray);
  box-shadow: var(--card-shadow);
  z-index: var(--sidebar-z-index);
  transition: left var(--transition-sidebar);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.sidebar.closed {
  left: calc(-1 * var(--sidebar-width-large)); /* Hidden when closed */
}

/* Main content adjustment for open sidebar by default */
#main-content {
  margin-left: var(--sidebar-width-large);
  transition: margin-left var(--transition-sidebar);
}

#main-content.sidebar-closed {
  margin-left: 0;
}

/* Sidebar header */
.sidebar-header {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  padding: var(--spacing-sm) var(--spacing-md);
  border-bottom: 1px solid var(--light-gray);
  min-height: var(--header-height);
  background: var(--primary-color);
}

.sidebar-close {
  background: rgba(255, 255, 255, 0.1);
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
  border-radius: var(--border-radius-small);
  color: white;
  transition: all var(--transition-fast);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.sidebar-close:hover {
  background: rgba(255, 255, 255, 0.2);
  color: white;
}

/* Sidebar content */
.sidebar-content {
  flex: 1;
  padding: var(--spacing-lg);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

/* New chat form and button */
.new-chat-form {
  margin: 0;
  padding: 0;
}

.new-chat-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--primary-color);
  color: var(--white);
  text-decoration: none;
  border: none;
  border-radius: var(--border-radius-medium);
  font-weight: 600;
  transition: all var(--transition-fast);
  box-shadow: var(--card-shadow);
  cursor: pointer;
  font-size: var(--font-size-base);
  font-family: inherit;
  width: 100%;
  justify-content: flex-start;
}

.new-chat-btn:hover {
  background: #206040;
  color: var(--white);
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.new-chat-btn svg {
  stroke: currentColor;
  flex-shrink: 0;
}

/* Chat history section */
.chat-history {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.chat-history h4 {
  color: #666;
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 1px solid var(--light-gray);
}

/* FIXED: Chat list with proper scrollbar management */
.chat-list {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  width: 100%;
  box-sizing: border-box;
  /* Add padding to prevent delete buttons from being obscured by scrollbar */
  padding-right: 8px;
  margin-right: -8px;
}

/* ==========================================================================
   CHAT ITEM WITH DELETE FUNCTIONALITY - FIXED
   ========================================================================== */

.chat-item-container {
  position: relative;
  display: flex;
  align-items: center;
  margin-bottom: var(--spacing-xs);
  border-radius: var(--border-radius-medium);
  transition: all var(--transition-fast);
  /* Ensure container has enough padding for delete button */
  padding-right: var(--spacing-sm);
}

.chat-item-container:hover {
  background: rgba(46, 139, 87, 0.05);
}

.chat-item-container .chat-item {
  flex: 1;
  margin-bottom: 0;
  min-width: 0; /* Allows text truncation */
  display: block;
  padding: var(--spacing-md);
  /* Reduce right padding to make room for delete button */
  padding-right: var(--spacing-sm);
  border-radius: var(--border-radius-medium);
  text-decoration: none;
  color: var(--text-color);
  transition: all var(--transition-fast);
  border: 1px solid transparent;
  background: var(--white);
  position: relative; /* Added for tooltip positioning */
}

.chat-item:hover {
  background: var(--bg-color);
  text-decoration: none;
  color: var(--text-color);
  border-color: var(--light-gray);
}

.chat-item.active {
  background: var(--secondary-color);
  border-color: var(--accent-color);
  color: var(--primary-color);
}

.chat-item.active .chat-title {
  font-weight: 600;
}

.chat-content {
  min-width: 0; /* Ensures proper text truncation */
  /* Add right margin to prevent text from overlapping delete button area */
  margin-right: var(--spacing-md);
}

.chat-title {
  font-size: var(--font-size-base);
  margin-bottom: var(--spacing-xs);
  line-height: 1.3;
  word-wrap: break-word;
  white-space: nowrap !important;
  overflow: hidden !important;
  text-overflow: ellipsis !important;
  display: block !important;
  max-width: 100% !important;
}

.chat-date {
  font-size: var(--font-size-sm);
  color: #666;
  opacity: 0.8;
}

.chat-item.active .chat-date {
  color: var(--primary-color);
  opacity: 1;
}

/* IMPROVED: Delete button styles - larger and more visible */
.chat-delete-form {
  margin: 0;
  padding: 0;
  position: relative;
}

.chat-delete-btn {
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(220, 53, 69, 0.2);
  color: #999;
  cursor: pointer;
  padding: var(--spacing-sm);
  border-radius: var(--border-radius-small);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  /* Made larger and more visible */
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  opacity: 0;
  visibility: hidden;
  margin-left: var(--spacing-sm);
  /* Ensure it's above any scrollbar */
  z-index: 10;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.chat-item-container:hover .chat-delete-btn {
  opacity: 1;
  visibility: visible;
}

.chat-delete-btn:hover {
  background: rgba(220, 53, 69, 0.1);
  color: #dc3545;
  transform: scale(1.1);
  border-color: #dc3545;
  box-shadow: 0 2px 6px rgba(220, 53, 69, 0.2);
}

.chat-delete-btn svg {
  stroke: currentColor;
  /* Made icon slightly larger */
  width: 16px;
  height: 16px;
}

/* NEW: Delete button tooltip - smart positioning */
.chat-delete-btn::before {
  content: 'Delete chat';
  position: absolute;
  /* Position to the left of the button to avoid scrollbar */
  top: 50%;
  right: calc(100% + 8px);
  transform: translateY(-50%);
  background: rgba(0, 0, 0, 0.9);
  color: white;
  padding: 6px 10px;
  border-radius: 4px;
  font-size: 12px;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
  pointer-events: none;
  z-index: 1000;
}

.chat-delete-btn::after {
  content: '';
  position: absolute;
  /* Arrow pointing right toward the button */
  top: 50%;
  right: calc(100% + 2px);
  transform: translateY(-50%);
  border: 4px solid transparent;
  border-left-color: rgba(0, 0, 0, 0.9);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
  pointer-events: none;
  z-index: 1000;
}

/* Alternative positioning for items near the top - keep same left positioning */
.chat-item-container:nth-child(-n+3) .chat-delete-btn::before {
  top: 50%;
  right: calc(100% + 8px);
  transform: translateY(-50%);
}

.chat-item-container:nth-child(-n+3) .chat-delete-btn::after {
  top: 50%;
  right: calc(100% + 2px);
  transform: translateY(-50%);
  border-top-color: transparent;
  border-bottom-color: transparent;
  border-left-color: rgba(0, 0, 0, 0.9);
  border-right-color: transparent;
}

.chat-delete-btn:hover::before,
.chat-delete-btn:hover::after {
  opacity: 1;
  visibility: visible;
}

/* ==========================================================================
   TOOLTIP STYLES FOR CHAT TITLES
   ========================================================================== */

/* Tooltip container */
.chat-tooltip {
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.9);
  color: white;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 14px;
  white-space: normal;
  word-wrap: break-word;
  max-width: 300px;
  min-width: 200px;
  text-align: center;
  line-height: 1.4;
  z-index: 1000;
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
  margin-bottom: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

/* Tooltip arrow */
.chat-tooltip::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: rgba(0, 0, 0, 0.9);
}

/* Show tooltip on hover */
.chat-item:hover .chat-tooltip {
  opacity: 1;
  visibility: visible;
}

/* Alternative positioning for items near top */
.chat-item.tooltip-below .chat-tooltip {
  top: 100%;
  bottom: auto;
  margin-top: 8px;
  margin-bottom: 0;
}

.chat-item.tooltip-below .chat-tooltip::after {
  top: -12px;
  border-top-color: transparent;
  border-bottom-color: rgba(0, 0, 0, 0.9);
}

/* ==========================================================================
   HEADER CHAT MENU DROPDOWN
   ========================================================================== */

.chat-menu {
  position: relative;
  margin-left: var(--spacing-md);
}

.chat-menu-trigger {
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: white;
  cursor: pointer;
  padding: var(--spacing-sm);
  border-radius: var(--border-radius-small);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
}

.chat-menu-trigger:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: scale(1.05);
}

.chat-menu-trigger svg {
  stroke: currentColor;
}

.chat-menu-dropdown {
  position: absolute;
  top: calc(100% + var(--spacing-xs));
  right: 0;
  background: var(--white);
  border: 1px solid var(--light-gray);
  border-radius: var(--border-radius-medium);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  min-width: 150px;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-fast);
}

.chat-menu-dropdown.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.chat-menu-dropdown::before {
  content: '';
  position: absolute;
  top: -6px;
  right: 12px;
  width: 12px;
  height: 12px;
  background: var(--white);
  border: 1px solid var(--light-gray);
  border-bottom: none;
  border-right: none;
  transform: rotate(45deg);
}

.chat-menu-form {
  margin: 0;
  padding: 0;
}

.chat-menu-item {
  width: 100%;
  background: none;
  border: none;
  padding: var(--spacing-md);
  text-align: left;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-base);
  color: var(--text-color);
  transition: all var(--transition-fast);
  border-radius: 0;
}

.chat-menu-item:first-child {
  border-top-left-radius: var(--border-radius-medium);
  border-top-right-radius: var(--border-radius-medium);
}

.chat-menu-item:last-child {
  border-bottom-left-radius: var(--border-radius-medium);
  border-bottom-right-radius: var(--border-radius-medium);
}

.chat-menu-item:hover {
  background: var(--bg-color);
}

.chat-menu-item.abandon-item {
  color: #ff9800;
}

.chat-menu-item.abandon-item:hover {
  background: rgba(255, 152, 0, 0.1);
  color: #ff9800;
}

.chat-menu-item.delete-item {
  color: #dc3545;
}

.chat-menu-item.delete-item:hover {
  background: rgba(220, 53, 69, 0.1);
  color: #dc3545;
}

.chat-menu-item.new-chat-item {
  color: var(--primary-color);
}

.chat-menu-item.new-chat-item:hover {
  background: rgba(46, 139, 87, 0.1);
  color: var(--primary-color);
}

.chat-menu-item svg {
  stroke: currentColor;
  flex-shrink: 0;
}

/* Sidebar overlay for mobile */
.sidebar-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.5);
  z-index: var(--overlay-z-index);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-sidebar);
}

.sidebar-overlay.active {
  opacity: 1;
  visibility: visible;
}

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

/* IMPROVED: Custom scrollbar for chat list - always visible but subtle */
.chat-list::-webkit-scrollbar {
  width: 6px;
}

.chat-list::-webkit-scrollbar-track {
  background: rgba(232, 241, 232, 0.5);
  border-radius: 3px;
}

.chat-list::-webkit-scrollbar-thumb {
  background: rgba(102, 194, 133, 0.3);
  border-radius: 3px;
  transition: background var(--transition-fast);
}

.chat-list::-webkit-scrollbar-thumb:hover {
  background: rgba(102, 194, 133, 0.6);
}

/* Header adjustments for hamburger menu */
.intro-header {
  display: flex;
  align-items: center;
  padding: 0 var(--spacing-lg);
  position: relative;
}

.intro-header .welcome-text {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  font-weight: 600;
}

.intro-header .signout-link {
  margin-left: auto;
}

/* Main content adjustment for open sidebar by default */
#main-content {
  margin-left: var(--sidebar-width-large);
  transition: margin-left var(--transition-sidebar);
}

#main-content.sidebar-closed {
  margin-left: 0;
}

/* ==========================================================================
   RESPONSIVE DESIGN
   ========================================================================== */

/* Desktop - adjust main content when sidebar is open */
@media (min-width: 1200px) {
  .sidebar {
    width: var(--sidebar-width);
  }
  
  .sidebar.closed {
    left: calc(-1 * var(--sidebar-width));
  }
  
  #main-content {
    margin-left: var(--sidebar-width);
  }
  
  #main-content.sidebar-closed {
    margin-left: 0;
  }
}

/* Don't show overlay on desktop */
@media (min-width: 769px) {
  .sidebar-overlay {
    display: none;
  }
}

/* Mobile specific sidebar styles */
@media (max-width: 768px) {
  .sidebar {
    width: var(--sidebar-width);
    left: calc(-1 * var(--sidebar-width)); /* Always hidden on mobile initially */
  }
  
  .sidebar.mobile-open {
    left: 0;
  }
  
  #main-content {
    margin-left: 0; /* No margin on mobile */
  }
  
  .sidebar-content {
    padding: var(--spacing-md);
  }
  
  .hamburger-menu {
    margin-right: var(--spacing-sm);
  }

  /* Mobile tooltip adjustments */
  .chat-tooltip {
    max-width: 250px;
    min-width: 150px;
    font-size: 13px;
    padding: 6px 10px;
  }
  
  .chat-tooltip::after {
    border-width: 5px;
  }
  
  .chat-item.tooltip-below .chat-tooltip::after {
    top: -10px;
  }

  /* Mobile delete button adjustments */
  .chat-delete-btn {
    opacity: 0.8;
    visibility: visible;
    width: 36px;
    height: 36px;
    padding: var(--spacing-sm);
  }
  
  .chat-delete-btn:hover {
    opacity: 1;
  }
  
  /* Header menu adjustments */
  .chat-menu {
    margin-left: var(--spacing-sm);
  }
  
  .chat-menu-trigger {
    width: 28px;
    height: 28px;
    padding: var(--spacing-xs);
  }
  
  .chat-menu-dropdown {
    right: -10px;
    min-width: 140px;
  }
  
  .chat-menu-item {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
  }
}

/* Very small mobile screens */
@media (max-width: 480px) {
  .sidebar {
    width: calc(100vw - 40px);
    left: calc(-100vw + 40px);
    max-width: 280px;
  }
  
  .sidebar-content {
    padding: var(--spacing-sm);
  }
  
  .new-chat-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
  }
  
  .chat-item {
    padding: var(--spacing-sm);
  }
  
  .chat-title {
    font-size: var(--font-size-sm);
  }
  
  .chat-date {
    font-size: var(--font-size-sm);
  }
  
  .hamburger-menu {
    padding: var(--spacing-xs);
  }

  /* Very small screen tooltip adjustments */
  .chat-tooltip {
    max-width: 200px;
    min-width: 120px;
    font-size: 12px;
    padding: 5px 8px;
  }

  /* Very small screen delete button adjustments */
  .chat-delete-btn {
    width: 32px;
    height: 32px;
  }

  .chat-menu-dropdown {
    right: -20px;
  }
}

/* ==========================================================================
   SPECIFICITY OVERRIDE - Must be at the end
   ========================================================================== */

/* Force chat titles to single line - override any conflicting styles */
.sidebar .chat-list .chat-item .chat-title {
  white-space: nowrap !important;
  overflow: hidden !important;
  text-overflow: ellipsis !important;
  display: block !important;
  max-width: 100% !important;
}