/* Chat Page Styles */

.chat-page {
  height: 100vh;
  /* Use dynamic viewport height for mobile browsers */
  height: 100dvh;
  max-height: 100dvh;
  display: flex;
  flex-direction: column;
}

.chat-container {
  display: grid;
  grid-template-columns: 400px 1fr;
  height: 100%;
  border-left: 1px solid var(--border);
  border-right: 1px solid var(--border);
  overflow: hidden;
  background: var(--background);
}

/* Sidebar */
.chat-sidebar {
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border);
  background: var(--background);
}

.chat-sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}

.chat-sidebar-header h1 {
  font-size: 20px;
  font-weight: 600;
  margin: 0;
}

.chat-search {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--background-secondary);
}

.chat-search svg {
  color: var(--foreground-tertiary);
  flex-shrink: 0;
}

.chat-search input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--foreground);
  font-size: 14px;
}

.chat-search input::placeholder {
  color: var(--foreground-tertiary);
}

/* Conversations List */
.conversations-list {
  flex: 1;
  overflow-y: auto;
}

.conversation-item {
  display: flex;
  gap: 16px;
  padding: 16px 24px;
  border: none;
  border-bottom: 1px solid var(--border);
  background: transparent;
  width: 100%;
  text-align: left;
  cursor: pointer;
  transition: background 0.15s ease;
}

.conversation-item:hover {
  background: var(--background-secondary);
}

.conversation-item.active {
  background: var(--background-tertiary);
  border-left: 3px solid var(--accent);
}

.conversation-avatar {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: var(--background-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  overflow: hidden;
  border: 1px solid var(--border);
}

.conversation-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.conversation-avatar span {
  font-size: 18px;
  font-weight: 600;
  color: var(--foreground);
}

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

.conversation-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 4px;
}

.conversation-name {
  font-weight: 600;
  font-size: 15px;
  color: var(--foreground);
}

.unread-badge {
  background: var(--accent);
  color: var(--background);
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  min-width: 20px;
  text-align: center;
}

.conversation-handle {
  font-size: 13px;
  color: var(--foreground-secondary);
  margin-bottom: 4px;
}

.conversation-preview {
  font-size: 14px;
  color: var(--foreground-tertiary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Main Chat Area */
.chat-main {
  display: flex;
  flex-direction: column;
  background: var(--background);
}

.chat-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--background-secondary);
}

.back-button {
  display: none;
}

.chat-header-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--background-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border: 1px solid var(--border);
  flex-shrink: 0;
}

.chat-header-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.chat-header-avatar span {
  font-size: 16px;
  font-weight: 600;
  color: var(--foreground);
}

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

.chat-header-info h2 {
  font-size: 16px;
  font-weight: 600;
  margin: 0 0 2px 0;
  color: var(--foreground);
}

.chat-header-info p {
  font-size: 13px;
  color: var(--foreground-secondary);
  margin: 0;
}

/* Messages */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.message {
  display: flex;
  gap: 12px;
  max-width: 70%;
}

.message.sent {
  flex-direction: row-reverse;
  margin-left: auto;
}

.message-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: var(--background-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border: 1px solid var(--border);
  flex-shrink: 0;
}

.message-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.message-avatar span {
  font-size: 14px;
  font-weight: 600;
  color: var(--foreground);
}

.message-content {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.message.sent .message-content {
  align-items: flex-end;
}

.message-bubble {
  padding: 12px 16px;
  border-radius: var(--radius-lg);
  background: var(--background-secondary);
  border: 1px solid var(--border);
  word-wrap: break-word;
}

.message.sent .message-bubble {
  background: var(--accent);
  color: var(--background);
  border-color: var(--accent);
}

.encrypted-indicator {
  font-size: 11px;
  font-weight: 500;
  opacity: 0.7;
  margin-bottom: 4px;
}

.encrypted-preview {
  font-size: 13px;
  font-family: 'Courier New', monospace;
  opacity: 0.8;
}

.message-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  color: var(--foreground-tertiary);
  padding: 0 4px;
}

.delivery-status {
  color: var(--foreground-secondary);
}

/* Chat Input */
.chat-input {
  display: flex;
  gap: 12px;
  padding: 20px 24px;
  border-top: 1px solid var(--border);
  background: var(--background-secondary);
}

.chat-input input {
  flex: 1;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--background);
  color: var(--foreground);
  font-size: 14px;
  outline: none;
  transition: border-color 0.15s ease;
}

.chat-input input:focus {
  border-color: var(--accent);
}

.chat-input input::placeholder {
  color: var(--foreground-tertiary);
}

.send-button {
  background: var(--accent);
  color: var(--background);
  border: none;
}

.send-button:hover:not(:disabled) {
  background: var(--accent-hover);
}

.send-button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Empty States */
.chat-empty-state {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 48px 24px;
  text-align: center;
  color: var(--foreground-tertiary);
}

.chat-empty-state svg {
  opacity: 0.3;
}

.chat-empty-state h2,
.chat-empty-state h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--foreground-secondary);
  margin: 0;
}

.chat-empty-state p {
  font-size: 14px;
  color: var(--foreground-tertiary);
  margin: 0;
  max-width: 320px;
}

.chat-loading {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 48px 24px;
}

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 24px;
}

.modal-content {
  background: var(--background-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  max-width: 480px;
  width: 100%;
}

.modal-content h2 {
  font-size: 20px;
  font-weight: 600;
  margin: 0 0 8px 0;
}

.modal-content p {
  font-size: 14px;
  color: var(--foreground-secondary);
  margin: 0 0 24px 0;
}

.modal-content form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.modal-content input {
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--background);
  color: var(--foreground);
  font-size: 14px;
  outline: none;
  transition: border-color 0.15s ease;
}

.modal-content input:focus {
  border-color: var(--accent);
}

.modal-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
}

/* Buttons */
.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--foreground);
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-icon:hover:not(:disabled) {
  background: var(--background-tertiary);
  border-color: var(--border-hover);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: none;
  background: var(--accent);
  color: var(--background);
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent-hover);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--foreground);
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-secondary:hover {
  background: var(--background-tertiary);
  border-color: var(--border-hover);
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .chat-container {
    grid-template-columns: 1fr;
    border-radius: 0;
    border-left: none;
    border-right: none;
  }

  .mobile-hidden {
    display: none;
  }

  .back-button {
    display: inline-flex;
  }

  .chat-sidebar {
    border-right: none;
  }

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