/* ========================================
   MESSENGER MODULE - ENTERPRISE STYLES
   Version: 2.0 | Updated: December 2025
   Inspace Furniture Procurement Platform
   ======================================== */

/* ========================================
   CSS Variables & Design Tokens
   ======================================== */
:root {
  /* Primary palette */
  --msg-primary: #3b82f6;
  --msg-primary-dark: #2563eb;
  --msg-primary-light: #60a5fa;
  --msg-secondary: #64748b;

  /* Status colors */
  --msg-success: #22c55e;
  --msg-warning: #f59e0b;
  --msg-danger: #ef4444;
  --msg-info: #06b6d4;

  /* Dark header gradient (enterprise pattern) */
  --msg-header-gradient: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
  --msg-header-accent: rgba(59, 130, 246, 0.15);

  /* Background colors */
  --msg-bg-primary: #ffffff;
  --msg-bg-secondary: #f8fafc;
  --msg-bg-tertiary: #f1f5f9;

  /* Border colors */
  --msg-border-light: #e2e8f0;
  --msg-border-medium: #cbd5e1;

  /* Text colors */
  --msg-text-primary: #1e293b;
  --msg-text-secondary: #64748b;
  --msg-text-muted: #94a3b8;

  /* Spacing */
  --msg-spacing-xs: 0.25rem;
  --msg-spacing-sm: 0.5rem;
  --msg-spacing-md: 1rem;
  --msg-spacing-lg: 1.5rem;
  --msg-spacing-xl: 2rem;
  --msg-spacing-2xl: 3rem;

  /* Typography */
  --msg-font-display: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  --msg-font-mono: "JetBrains Mono", "Fira Code", monospace;

  /* Shadows */
  --msg-shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
  --msg-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
  --msg-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
    0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --msg-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1),
    0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --msg-shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1),
    0 10px 10px -5px rgba(0, 0, 0, 0.04);

  /* Border radius */
  --msg-radius-sm: 0.375rem;
  --msg-radius-md: 0.5rem;
  --msg-radius-lg: 0.75rem;
  --msg-radius-xl: 1rem;
  --msg-radius-2xl: 1.5rem;
  --msg-radius-full: 9999px;

  /* Transitions */
  --msg-transition-fast: 150ms ease;
  --msg-transition-normal: 200ms ease;
  --msg-transition-slow: 300ms ease;
}

/* ========================================
   Enterprise Page Header
   ======================================== */
.messenger-page-header {
  background: var(--msg-header-gradient);
  border-radius: var(--msg-radius-xl);
  padding: var(--msg-spacing-lg) var(--msg-spacing-xl);
  margin-bottom: var(--msg-spacing-lg);
  position: relative;
  overflow: hidden;
}

.messenger-page-header::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 50%;
  height: 100%;
  background: linear-gradient(90deg, transparent, var(--msg-header-accent));
  pointer-events: none;
}

.messenger-page-header::after {
  content: "";
  position: absolute;
  bottom: -50%;
  right: -10%;
  width: 300px;
  height: 300px;
  background: radial-gradient(
    circle,
    rgba(59, 130, 246, 0.1) 0%,
    transparent 70%
  );
  pointer-events: none;
}

.messenger-header-content {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: var(--msg-spacing-lg);
}

.messenger-header-info {
  flex: 1;
  min-width: 250px;
}

.messenger-header-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: #fff;
  margin: 0 0 var(--msg-spacing-xs) 0;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: var(--msg-spacing-sm);
}

.messenger-header-title i {
  font-size: 1.5rem;
  opacity: 0.9;
}

.messenger-header-subtitle {
  color: #94a3b8;
  font-size: 0.875rem;
  margin: 0;
}

.messenger-header-meta {
  display: flex;
  gap: var(--msg-spacing-lg);
  margin-top: var(--msg-spacing-md);
  padding-top: var(--msg-spacing-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  flex-wrap: wrap;
}

.messenger-meta-item {
  display: flex;
  align-items: center;
  gap: var(--msg-spacing-sm);
  font-size: 0.8125rem;
  color: #94a3b8;
}

.messenger-meta-item i {
  color: var(--msg-primary-light);
  font-size: 1rem;
}

.messenger-meta-item strong {
  color: #fff;
  font-weight: 600;
}

/* Quick Stats in Header */
.messenger-quick-stats {
  display: flex;
  gap: var(--msg-spacing-lg);
  align-items: center;
}

.messenger-quick-stat {
  text-align: center;
  min-width: 70px;
  padding: var(--msg-spacing-sm) var(--msg-spacing-md);
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--msg-radius-md);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.messenger-quick-stat-value {
  font-family: var(--msg-font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
  line-height: 1;
}

.messenger-quick-stat-label {
  font-size: 0.625rem;
  color: #64748b;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: var(--msg-spacing-xs);
}

/* ========================================
   Main Messaging Container
   ======================================== */
.messaging-container {
  /* height: calc(100vh - 220px); */
  min-height: 300px;
  background: var(--msg-bg-primary);
  border-radius: var(--msg-radius-xl);
  box-shadow: var(--msg-shadow-lg);
  overflow: hidden;
  border: 1px solid var(--msg-border-light);
}

/* ========================================
   Conversations Sidebar
   ======================================== */
.conversations-sidebar {
  border-right: 1px solid var(--msg-border-light);
  background: var(--msg-bg-secondary);
  height: 100%;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.sidebar-header {
  padding: var(--msg-spacing-md);
  background: var(--msg-bg-primary);
  border-bottom: 1px solid var(--msg-border-light);
}

/* Search Bar */
.messenger-search-bar {
  padding: var(--msg-spacing-md);
  background: var(--msg-bg-primary);
  border-bottom: 1px solid var(--msg-border-light);
}

.messenger-search-input {
  border: 1px solid var(--msg-border-light);
  border-radius: var(--msg-radius-full);
  padding: var(--msg-spacing-sm) var(--msg-spacing-md);
  font-size: 0.875rem;
  transition: var(--msg-transition-normal);
}

.messenger-search-input:focus {
  border-color: var(--msg-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* New Conversation Button */
.new-conversation-section {
  padding: var(--msg-spacing-md);
  border-bottom: 1px solid var(--msg-border-light);
}

.btn-new-conversation {
  width: 100%;
  background: var(--msg-primary);
  border: none;
  border-radius: var(--msg-radius-md);
  padding: var(--msg-spacing-sm) var(--msg-spacing-md);
  font-weight: 600;
  transition: var(--msg-transition-normal);
}

.btn-new-conversation:hover {
  background: var(--msg-primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--msg-shadow-md);
}

/* Conversations List */
.conversations-list {
  flex: 1;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--msg-border-medium) transparent;
  max-height: 500px;
}

.conversations-list::-webkit-scrollbar {
  width: 6px;
}

.conversations-list::-webkit-scrollbar-track {
  background: transparent;
}

.conversations-list::-webkit-scrollbar-thumb {
  background: var(--msg-border-medium);
  border-radius: var(--msg-radius-full);
}

/* Conversation Item */
.conversation-item {
  padding: var(--msg-spacing-md);
  border-bottom: 1px solid var(--msg-border-light);
  cursor: pointer;
  transition: var(--msg-transition-normal);
  position: relative;
}

.conversation-item:hover {
  background: var(--msg-bg-tertiary);
}

.conversation-item.active {
  background: rgba(59, 130, 246, 0.1);
  border-left: 3px solid var(--msg-primary);
}

.conversation-item.unread {
  background: rgba(59, 130, 246, 0.05);
}

.conversation-item.unread::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 60%;
  background: var(--msg-primary);
  border-radius: 0 2px 2px 0;
}

/* Conversation Avatar */
.conversation-avatar {
  width: 48px;
  height: 48px;
  border-radius: var(--msg-radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  color: #fff;
  font-size: 0.875rem;
  flex-shrink: 0;
  position: relative;
}

.conversation-avatar.avatar-project {
  background: linear-gradient(135deg, #3b82f6, #1d4ed8);
}
.conversation-avatar.avatar-offer {
  background: linear-gradient(135deg, #f59e0b, #d97706);
}
.conversation-avatar.avatar-order {
  background: linear-gradient(135deg, #22c55e, #16a34a);
}
.conversation-avatar.avatar-product {
  background: linear-gradient(135deg, #8b5cf6, #7c3aed);
}
.conversation-avatar.avatar-general {
  background: linear-gradient(135deg, #64748b, #475569);
}
.conversation-avatar.avatar-manufacturer-quote {
  background: linear-gradient(135deg, #ec4899, #db2777);
}

.online-indicator {
  position: absolute;
  bottom: 2px;
  right: 2px;
  width: 12px;
  height: 12px;
  background: var(--msg-success);
  border: 2px solid var(--msg-bg-primary);
  border-radius: var(--msg-radius-full);
}

/* Conversation Info */
.conversation-info {
  flex: 1;
  min-width: 0;
}

.conversation-title {
  font-weight: 600;
  color: var(--msg-text-primary);
  font-size: 0.9375rem;
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.conversation-time {
  font-size: 0.75rem;
  color: var(--msg-text-muted);
  white-space: nowrap;
}

.conversation-meta {
  display: flex;
  align-items: center;
  gap: var(--msg-spacing-sm);
  margin-top: var(--msg-spacing-xs);
  flex-wrap: wrap;
}

.conversation-preview {
  font-size: 0.8125rem;
  color: var(--msg-text-secondary);
  margin: var(--msg-spacing-xs) 0 0 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.4;
}

/* Context Badges */
.context-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: var(--msg-radius-sm);
  font-size: 0.625rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.context-badge-project {
  background: #dbeafe;
  color: #1e40af;
}
.context-badge-offer {
  background: #fef3c7;
  color: #92400e;
}
.context-badge-order {
  background: #d1fae5;
  color: #065f46;
}
.context-badge-product {
  background: #ede9fe;
  color: #5b21b6;
}
.context-badge-general {
  background: #e2e8f0;
  color: #475569;
}
.context-badge-manufacturer-quote {
  background: #fce7f3;
  color: #9d174d;
}

.context-info {
  font-size: 0.7rem;
  color: var(--msg-text-secondary);
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 120px;
}

/* Unread Badge */
.unread-badge {
  background: var(--msg-primary);
  color: #fff;
  font-size: 0.6875rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--msg-radius-full);
  min-width: 20px;
  text-align: center;
}

/* Participant Count */
.participant-count {
  font-size: 0.7rem;
  color: var(--msg-text-muted);
  display: flex;
  align-items: center;
  gap: 4px;
}

.participant-count i {
  font-size: 0.75rem;
}

/* ========================================
   Message Area
   ======================================== */
.message-area {
  display: flex;
  flex-direction: column;
  background: var(--msg-bg-secondary);
}

/* Message Header */
.message-header {
  background: var(--msg-bg-primary);
  border-bottom: 1px solid var(--msg-border-light);
}

/* Mobile row (back button + actions) - only shown on mobile */
.message-header-mobile-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--msg-spacing-sm) var(--msg-spacing-md);
  border-bottom: 1px solid var(--msg-border-light);
  background: var(--msg-bg-secondary);
}

.btn-back-mobile {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.375rem 0.75rem;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--msg-primary);
  background: transparent;
  border: 1px solid var(--msg-primary);
  border-radius: var(--msg-radius-md);
  transition: var(--msg-transition-fast);
}

.btn-back-mobile:hover {
  background: var(--msg-primary);
  color: #fff;
}

.btn-back-mobile i {
  font-size: 0.875rem;
}

.conversation-actions-mobile {
  display: flex;
  gap: 0.25rem;
}

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

.btn-icon-mobile:hover {
  background: var(--msg-bg-tertiary);
  color: var(--msg-text-primary);
  border-color: var(--msg-border-medium);
}

.btn-icon-mobile i {
  font-size: 1rem;
}

/* Main header content */
.message-header-main {
  padding: var(--msg-spacing-md) var(--msg-spacing-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--msg-spacing-md);
  width: 100%;
}

.message-header-info {
  display: flex;
  align-items: center;
  gap: var(--msg-spacing-md);
  min-width: 0;
  flex: 1;
}

.message-header-avatar {
  width: 44px;
  height: 44px;
  border-radius: var(--msg-radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  color: #fff;
  flex-shrink: 0;
  background: linear-gradient(
    135deg,
    #64748b,
    #475569
  ); /* Default background */
}

/* Avatar context colors for message header */
.message-header-avatar.avatar-project {
  background: linear-gradient(135deg, #3b82f6, #1d4ed8);
}
.message-header-avatar.avatar-offer {
  background: linear-gradient(135deg, #10b981, #059669);
}
.message-header-avatar.avatar-order {
  background: linear-gradient(135deg, #f59e0b, #d97706);
}
.message-header-avatar.avatar-product {
  background: linear-gradient(135deg, #8b5cf6, #7c3aed);
}
.message-header-avatar.avatar-manufacturer-quote {
  background: linear-gradient(135deg, #ec4899, #db2777);
}
.message-header-avatar.avatar-general {
  background: linear-gradient(135deg, #64748b, #475569);
}

.message-header-details {
  min-width: 0;
  flex: 1;
}

.message-header-details h5 {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--msg-text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 350px;
}

.message-header-details small {
  color: var(--msg-text-secondary);
  font-size: 0.8125rem;
}

.conversation-actions {
  display: flex;
  gap: var(--msg-spacing-sm);
}

.conversation-actions .btn {
  padding: var(--msg-spacing-sm);
  border-radius: var(--msg-radius-md);
}

/* ========================================
   Enterprise Message Thread Wrapper
   ======================================== */
.message-thread,
.message-thread-wrapper {
  flex: 1;
  overflow-y: auto;
  padding: 1.5rem;
  padding-bottom: 2rem;
  scrollbar-width: thin;
  scrollbar-color: var(--msg-border-medium) transparent;
}

.message-thread::-webkit-scrollbar,
.message-thread-wrapper::-webkit-scrollbar {
  width: 6px;
}

.message-thread::-webkit-scrollbar-track,
.message-thread-wrapper::-webkit-scrollbar-track {
  background: transparent;
}

.message-thread::-webkit-scrollbar-thumb,
.message-thread-wrapper::-webkit-scrollbar-thumb {
  background: var(--msg-border-medium);
  border-radius: var(--msg-radius-full);
}

/* Message Group - Contains date header + messages */
.message-group {
  margin-bottom: 1.5rem;
}

/* Enterprise Date Badge */
.message-date,
.message-date-separator {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 1.5rem 0 1rem 0;
  position: sticky;
  top: 0;
  z-index: 10;
}

.date-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 1rem;
  background: linear-gradient(
    135deg,
    rgba(59, 130, 246, 0.08) 0%,
    rgba(139, 92, 246, 0.06) 100%
  );
  backdrop-filter: blur(12px);
  border: 1px solid rgba(59, 130, 246, 0.12);
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
  color: #64748b;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

/* Enterprise Message Item */
.message-item {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1rem;
  align-items: flex-start;
  animation: messageSlideIn 0.25s ease-out;
}

.message-item.own {
  flex-direction: row-reverse;
}

@keyframes messageSlideIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Enterprise Message Avatar (supports both class names) */
.message-avatar,
.message-sender-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.25);
  text-transform: uppercase;
}

.message-item.own .message-avatar,
.message-item.own .message-sender-avatar {
  background: linear-gradient(135deg, #22c55e 0%, #16a34a 100%);
  box-shadow: 0 2px 8px rgba(34, 197, 94, 0.25);
}

/* Enterprise Message Content */
.message-content {
  max-width: 70%;
  min-width: 120px;
  position: relative;
}

/* Enterprise Message Bubble */
.message-bubble {
  background: #ffffff;
  padding: 0.75rem 1rem;
  border-radius: 1rem;
  border-top-left-radius: 0.25rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  border: 1px solid rgba(0, 0, 0, 0.04);
  position: relative;
  word-wrap: break-word;
}

.message-item.own .message-bubble {
  background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
  color: #fff;
  border: none;
  border-top-left-radius: 1rem;
  border-top-right-radius: 0.25rem;
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
}

/* Enterprise Sender Name */
.message-sender {
  font-size: 0.75rem;
  font-weight: 600;
  color: #3b82f6;
  margin-bottom: 0.25rem;
  display: flex;
  align-items: center;
  gap: 0.375rem;
}

.message-item.own .message-sender {
  color: rgba(255, 255, 255, 0.85);
  justify-content: flex-end;
}

/* Enterprise Message Text */
.message-text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.55;
  color: #1e293b;
  word-break: break-word;
  white-space: pre-wrap;
}

.message-item.own .message-text {
  color: #ffffff;
}

/* Enterprise Message Time */
.message-time {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  margin-top: 0.375rem;
  font-size: 0.6875rem;
  color: #94a3b8;
}

.message-item.own .message-time {
  justify-content: flex-end;
  color: #64748b;
}

.message-time .read-indicator {
  color: #22c55e;
}

.message-time .read-indicator i {
  font-size: 0.875rem;
}

/* Read Receipt */
.read-receipt {
  display: inline-flex;
  align-items: center;
}

.read-receipt i {
  font-size: 0.875rem;
}

.read-receipt.read {
  color: var(--msg-success);
}

/* ========================================
   Enterprise Attachment Styles
   ======================================== */
.message-attachment {
  margin-top: 0.75rem;
  padding: 0.75rem;
  background: rgba(0, 0, 0, 0.03);
  border-radius: 0.75rem;
  border: 1px solid rgba(0, 0, 0, 0.06);
}

.message-item.own .message-attachment {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.15);
}

.attachment-preview {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.attachment-icon {
  width: 40px;
  height: 40px;
  border-radius: 0.5rem;
  background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #64748b;
  font-size: 1.125rem;
  flex-shrink: 0;
}

.message-item.own .attachment-icon {
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
}

.attachment-info {
  flex: 1;
  min-width: 0;
}

.attachment-name {
  font-size: 0.8125rem;
  font-weight: 600;
  color: #1e293b;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.message-item.own .attachment-name {
  color: #fff;
}

.attachment-size {
  font-size: 0.6875rem;
  color: #94a3b8;
}

.message-item.own .attachment-size {
  color: rgba(255, 255, 255, 0.7);
}

.attachment-download {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(59, 130, 246, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #3b82f6;
  transition: all 0.2s ease;
  flex-shrink: 0;
  text-decoration: none;
}

.attachment-download:hover {
  background: #3b82f6;
  color: #fff;
  transform: scale(1.05);
}

.message-item.own .attachment-download {
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
}

.message-item.own .attachment-download:hover {
  background: rgba(255, 255, 255, 0.35);
}

/* Image Attachment Preview */
.attachment-image-preview {
  max-width: 280px;
  border-radius: 0.5rem;
  overflow: hidden;
  margin-bottom: 0.5rem;
}

.attachment-image-preview img {
  width: 100%;
  height: auto;
  display: block;
  cursor: pointer;
  transition: transform 0.2s ease;
}

.attachment-image-preview img:hover {
  transform: scale(1.02);
}

/* Loading Messages Indicator */
.loading-messages-indicator {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 200px;
  color: var(--msg-primary, #3b82f6);
  gap: var(--msg-spacing-md, 1rem);
}

/* Typing Indicator - Above compose area */
.typing-indicator-wrapper {
  padding: var(--msg-spacing-sm, 0.5rem) var(--msg-spacing-lg, 1.5rem);
  background: rgba(59, 130, 246, 0.05);
  border-top: 1px solid rgba(59, 130, 246, 0.1);
  display: none;
}

.typing-indicator-wrapper.visible {
  display: flex;
  align-items: center;
  gap: var(--msg-spacing-sm, 0.5rem);
}

/* ========================================
   Message Compose Area
   ======================================== */
*/ .message-compose {
  padding: var(--msg-spacing-md) var(--msg-spacing-lg);
  background: var(--msg-bg-primary);
  border-top: 1px solid var(--msg-border-light);
}

.compose-input-group {
  display: flex;
  align-items: flex-end;
  gap: var(--msg-spacing-sm);
  background: var(--msg-bg-secondary);
  border: 1px solid var(--msg-border-light);
  border-radius: var(--msg-radius-xl);
  padding: var(--msg-spacing-xs);
  transition: var(--msg-transition-normal);
}

.compose-input-group:focus-within {
  border-color: var(--msg-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.compose-actions {
  display: flex;
  gap: var(--msg-spacing-xs);
}

.compose-textarea {
  flex: 1;
  border: none;
  background: transparent;
  padding: var(--msg-spacing-sm) var(--msg-spacing-md);
  resize: none;
  max-height: 120px;
  min-height: 40px;
  font-size: 0.9375rem;
  line-height: 1.5;
}

.compose-textarea:focus {
  outline: none;
}

.compose-textarea::placeholder {
  color: var(--msg-text-muted);
}

.btn-compose {
  width: 40px;
  height: 40px;
  border-radius: var(--msg-radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  transition: var(--msg-transition-normal);
}

.btn-compose:hover {
  transform: translateY(-1px);
}

.btn-compose.btn-primary {
  background: var(--msg-primary);
  border: none;
}

.btn-compose.btn-primary:hover {
  background: var(--msg-primary-dark);
}

/* ========================================
   Typing Indicator
   ======================================== */
.typing-indicator {
  padding: var(--msg-spacing-sm) var(--msg-spacing-lg);
  background: rgba(59, 130, 246, 0.05);
  border-top: 1px solid rgba(59, 130, 246, 0.1);
  font-size: 0.8125rem;
  color: var(--msg-primary);
  display: none;
}

.typing-indicator.visible {
  display: flex;
  align-items: center;
  gap: var(--msg-spacing-sm);
}

.typing-dots {
  display: inline-flex;
  gap: 4px;
}

.typing-dot {
  width: 6px;
  height: 6px;
  background: var(--msg-primary);
  border-radius: var(--msg-radius-full);
  animation: typingBounce 1.4s infinite both;
}

.typing-dot:nth-child(2) {
  animation-delay: 0.16s;
}
.typing-dot:nth-child(3) {
  animation-delay: 0.32s;
}

@keyframes typingBounce {
  0%,
  60%,
  100% {
    transform: translateY(0);
  }
  30% {
    transform: translateY(-8px);
  }
}

/* ========================================
   Enterprise Empty State
   ======================================== */
.empty-conversation {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  min-height: 300px;
  padding: 2rem;
  text-align: center;
}

.empty-conversation-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(
    135deg,
    rgba(59, 130, 246, 0.1) 0%,
    rgba(139, 92, 246, 0.08) 100%
  );
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}

.empty-conversation-icon i,
.empty-conversation > i {
  font-size: 1.75rem;
  color: #3b82f6;
}

/* Legacy support for direct i element */
.empty-conversation > i:first-child {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(
    135deg,
    rgba(59, 130, 246, 0.1) 0%,
    rgba(139, 92, 246, 0.08) 100%
  );
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  font-size: 1.75rem;
  color: #3b82f6;
  opacity: 1;
}

.empty-conversation h4 {
  font-size: 1rem;
  font-weight: 600;
  color: #1e293b;
  margin-bottom: 0.5rem;
}

.empty-conversation p {
  font-size: 0.875rem;
  color: #64748b;
  max-width: 280px;
}

.empty-conversation a {
  color: #3b82f6;
  font-weight: 500;
  text-decoration: none;
}

.empty-conversation a:hover {
  text-decoration: underline;
}

/* ========================================
   Loading States
   ======================================== */
.loading-spinner {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--msg-spacing-xl);
}

.skeleton-conversation {
  padding: var(--msg-spacing-md);
  border-bottom: 1px solid var(--msg-border-light);
}

.skeleton-avatar {
  width: 48px;
  height: 48px;
  border-radius: var(--msg-radius-full);
  background: linear-gradient(90deg, #f1f5f9 25%, #e2e8f0 50%, #f1f5f9 75%);
  background-size: 200% 100%;
  animation: skeletonLoading 1.5s infinite;
}

.skeleton-text {
  height: 12px;
  border-radius: var(--msg-radius-sm);
  background: linear-gradient(90deg, #f1f5f9 25%, #e2e8f0 50%, #f1f5f9 75%);
  background-size: 200% 100%;
  animation: skeletonLoading 1.5s infinite;
}

.skeleton-text.short {
  width: 60%;
}
.skeleton-text.medium {
  width: 80%;
}
.skeleton-text.full {
  width: 100%;
}

@keyframes skeletonLoading {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

/* ========================================
   Attachment Styles
   ======================================== */
.attachment-simple {
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid var(--msg-border-light);
  border-radius: var(--msg-radius-md);
  padding: var(--msg-spacing-sm) var(--msg-spacing-md);
  margin-top: var(--msg-spacing-sm);
  display: flex;
  align-items: center;
  gap: var(--msg-spacing-sm);
  transition: var(--msg-transition-normal);
}

.attachment-simple:hover {
  box-shadow: var(--msg-shadow-sm);
  border-color: var(--msg-border-medium);
}

.message-item.own .attachment-simple {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.3);
}

.attachment-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--msg-radius-md);
  background: var(--msg-bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--msg-primary);
}

.message-item.own .attachment-icon {
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
}

.attachment-info {
  flex: 1;
  min-width: 0;
}

.attachment-name {
  font-weight: 500;
  font-size: 0.875rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.attachment-size {
  font-size: 0.75rem;
  color: var(--msg-text-muted);
}

.message-item.own .attachment-size {
  color: rgba(255, 255, 255, 0.7);
}

.attachment-download-btn {
  padding: var(--msg-spacing-xs) var(--msg-spacing-sm);
  border-radius: var(--msg-radius-sm);
  transition: var(--msg-transition-normal);
}

.attachment-download-btn:hover {
  background: var(--msg-primary);
  color: #fff;
}

/* Image Preview */
.message-image-preview {
  max-width: 280px;
  max-height: 200px;
  border-radius: var(--msg-radius-md);
  cursor: pointer;
  transition: var(--msg-transition-normal);
  border: 2px solid var(--msg-border-light);
}

.message-image-preview:hover {
  transform: scale(1.02);
  box-shadow: var(--msg-shadow-md);
  border-color: var(--msg-primary);
}

/* File Upload Area */
.file-upload-area {
  border: 2px dashed var(--msg-border-medium);
  border-radius: var(--msg-radius-lg);
  padding: var(--msg-spacing-lg);
  text-align: center;
  background: var(--msg-bg-secondary);
  transition: var(--msg-transition-normal);
}

.file-upload-area.drag-over {
  border-color: var(--msg-primary);
  background: rgba(59, 130, 246, 0.05);
}

.file-upload-area i {
  font-size: 2rem;
  color: var(--msg-text-muted);
  margin-bottom: var(--msg-spacing-sm);
}

/* ========================================
   Search Highlight
   ======================================== */
.search-highlight {
  background-color: #fff3cd !important;
  border-left: 3px solid #ffc107 !important;
  padding-left: var(--msg-spacing-sm) !important;
  animation: highlightPulse 0.5s ease-in-out;
}

@keyframes highlightPulse {
  0%,
  100% {
    background-color: #fff3cd;
  }
  50% {
    background-color: #ffe69c;
  }
}

/* ========================================
   Modal Enhancements
   ======================================== */
.modal-content {
  border-radius: var(--msg-radius-lg);
  border: none;
  box-shadow: var(--msg-shadow-xl);
}

.modal-header {
  border-bottom: 1px solid var(--msg-border-light);
  padding: var(--msg-spacing-md) var(--msg-spacing-lg);
}

.modal-body {
  padding: var(--msg-spacing-lg);
}

.modal-footer {
  border-top: 1px solid var(--msg-border-light);
  padding: var(--msg-spacing-md) var(--msg-spacing-lg);
}

/* ========================================
   Back Button (Conversation View)
   ======================================== */
.back-button {
  position: fixed;
  top: 100px;
  left: 20px;
  z-index: 1000;
  background: var(--msg-bg-primary);
  border: 2px solid var(--msg-primary);
  color: var(--msg-primary);
  width: 44px;
  height: 44px;
  border-radius: var(--msg-radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--msg-shadow-lg);
  transition: var(--msg-transition-normal);
}

.back-button:hover {
  background: var(--msg-primary);
  color: #fff;
  transform: translateY(-2px);
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 992px) {
  .messenger-page-header {
    padding: var(--msg-spacing-md);
    border-radius: var(--msg-radius-md);
  }

  .messenger-header-title {
    font-size: 1.5rem;
  }

  .messenger-quick-stats {
    display: none;
  }
}

/* Mobile sidebar breakpoint - matches Bootstrap lg (992px) */
@media (max-width: 991.98px) {
  .messenger-page-header {
    border-radius: 0;
    margin-left: -12px;
    margin-right: -12px;
    margin-top: -12px;
  }

  .messaging-container {
    /* height: calc(100vh - 200px); */
    border-radius: var(--msg-radius-md);
  }

  .conversations-sidebar {
    position: fixed;
    left: -100%;
    top: 0;
    bottom: 0;
    width: 85%;
    max-width: 360px;
    z-index: 1050;
    transition: left 0.3s ease;
    box-shadow: var(--msg-shadow-xl);
    background: var(--msg-bg-primary);
    padding-top: 60px; /* Account for navbar */
  }

  .conversations-sidebar.show {
    left: 0;
  }

  .sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1040;
    opacity: 0;
    visibility: hidden;
    transition: var(--msg-transition-normal);
  }

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

  /* Hide sidebar on mobile by default, show message area */
  .message-area {
    width: 100%;
    max-width: 100%;
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100%;
    position: relative;
  }

  .message-header {
    flex-direction: column;
  }

  /* Mobile header adjustments */
  .message-header-main {
    padding: var(--msg-spacing-sm) var(--msg-spacing-md);
  }

  .message-header-avatar {
    width: 40px;
    height: 40px;
    font-size: 0.875rem;
  }

  .message-header-details h5 {
    font-size: 0.9375rem;
    max-width: calc(100vw - 200px);
  }

  .message-header-details small {
    font-size: 0.75rem;
  }

  /* Message thread takes remaining space */
  .message-thread {
    flex: 1;
    overflow-y: auto;
    padding: var(--msg-spacing-md);
    /* padding-bottom: 100px;  Space for sticky compose */
  }

  .message-content {
    max-width: 85%;
  }

  /* STICKY MESSAGE COMPOSE ON MOBILE */
  .message-compose {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--msg-spacing-sm) var(--msg-spacing-md);
    background: var(--msg-bg-primary);
    border-top: 1px solid var(--msg-border-light);
    z-index: 100;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
  }

  .compose-input-group {
    padding: var(--msg-spacing-xs);
  }

  .compose-textarea {
    font-size: 1rem;
    padding: var(--msg-spacing-sm);
  }

  .btn-compose {
    width: 38px;
    height: 38px;
  }

  .back-button {
    top: 80px;
    left: 12px;
    width: 40px;
    height: 40px;
  }

  .context-info {
    max-width: 100px;
  }

  /* Empty state adjustments */
  .empty-conversation {
    padding-bottom: 100px;
    min-height: 200px;
  }

  .empty-conversation-icon {
    width: 56px;
    height: 56px;
  }

  .empty-conversation-icon i,
  .empty-conversation > i:first-child {
    font-size: 1.5rem;
  }

  .empty-conversation h4 {
    font-size: 0.9375rem;
  }

  .empty-conversation p {
    font-size: 0.8125rem;
    max-width: 240px;
  }

  /* Message bubble mobile adjustments */
  .message-bubble {
    padding: 0.625rem 0.875rem;
  }

  .message-sender-avatar,
  .message-avatar {
    width: 32px;
    height: 32px;
    font-size: 0.6875rem;
  }
}

@media (max-width: 576px) {
  .messenger-header-meta {
    flex-direction: column;
    gap: var(--msg-spacing-sm);
  }

  .conversation-item {
    padding: var(--msg-spacing-sm);
  }

  .conversation-avatar {
    width: 40px;
    height: 40px;
  }

  .conversation-title {
    font-size: 0.875rem;
  }

  /* Extra small mobile header */
  .message-header-details h5 {
    max-width: calc(100vw - 160px);
    font-size: 0.85rem;
  }

  .message-header-avatar {
    width: 36px;
    height: 36px;
  }

  .btn-icon-mobile {
    width: 32px;
    height: 32px;
  }

  .btn-icon-mobile i {
    font-size: 0.875rem;
  }

  .btn-back-mobile {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
  }

  /* Compose adjustments for small screens */
  .message-compose {
    padding: var(--msg-spacing-xs) var(--msg-spacing-sm);
  }

  .btn-compose {
    width: 36px;
    height: 36px;
  }
}

/* ========================================
   Conversation View Page Styles
   ======================================== */
.conversation-view-container {
  display: flex;
  flex-direction: column;
  /* height: calc(100vh - 250px); /* Adjust for header */
  min-height: 500px;
}

.messages-view-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: var(--msg-bg-primary);
  border-radius: var(--msg-radius-xl);
  box-shadow: var(--msg-shadow-lg);
  overflow: hidden;
  margin-bottom: 1.5rem;
}

/* Sticky compose area wrapper */
.compose-area-sticky {
  position: sticky;
  bottom: 0;
  background: var(--msg-bg-primary);
  border-radius: 0 0 var(--msg-radius-xl) var(--msg-radius-xl);
}

/* Mobile back button in header */
.back-btn-mobile {
  display: none;
}

@media (max-width: 991.98px) {
  .conversation-view-container {
    /* height: calc(100vh - 200px); */
  }

  .back-btn-mobile {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--msg-radius-md);
    color: #fff;
    transition: var(--msg-transition-fast);
  }

  .back-btn-mobile:hover {
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
    text-decoration: none;
  }

  .messages-view-container {
    margin-bottom: 80px; /* Space for sticky compose */
    border-radius: var(--msg-radius-lg);
  }

  .compose-area-sticky {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    border-radius: 0;
    z-index: 100;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
  }
}

@media (max-width: 576px) {
  .conversation-view-container {
    /* height: calc(100vh - 200px); */
  }
}

/* ========================================
   Print Styles
   ======================================== */
@media print {
  .messenger-page-header,
  .conversations-sidebar,
  .message-compose,
  .conversation-actions,
  .back-button {
    display: none !important;
  }

  .messaging-container {
    height: auto;
    box-shadow: none;
    border: none;
  }

  .message-thread {
    overflow: visible;
  }
}