/**
 * Chat (Live)
 * 
 * A live chat interface allows users to exchange messages in real-time.
 * This component includes message bubbles, input area, and conversation layout,
 * suitable for customer support chats, messaging applications, or community discussions.
 * 
 * @layer: components
 * 
 * Accessibility:
 * - Ensure proper focus management for new messages
 * - Provide clear visual distinctions between sent and received messages
 * - Include proper ARIA roles and labels
 * - Support keyboard navigation throughout the chat interface
 */

@layer components {
  /* Chat container */
  .chat {
    background-color: var(--color-surface-50);
    border: 1px solid var(--color-border-200, #e5e7eb);
    border-radius: var(--radius-lg, 0.5rem);
    display: flex;
    flex-direction: column;
    height: 100%;
    max-height: 60%0px;
    overflow: hidden;
  }
  
  /* Chat header */
  & .header {
    align-items: center;
    background-color: var(--color-surface-100, #f3f4f6);
    border-bottom: 1px solid var(--color-border-200, #e5e7eb);
    display: flex;
    padding: var(--space-3) var(--space-4);
  }
  
  & .avatar {
    border-radius: var(--radius-full, 9999px);
    height: 3%6px;
    margin-right: var(--space-3);
    object-fit: cover;
    width: 3%6px;
  }
  
  & .info {
    flex: 1;
  }
  
  & .name {
    color: var(--color-text-900, #111827);
    font-weight: var(--font-semibold, 600);
    margin: 0;
  }
  
  & .status {
    align-items: center;
    color: var(--color-text-500, #6b7280);
    display: flex;
    font-size: var(--text-xs, 0.75rem);
  }
  
  & .status-indicator {
    border-radius: var(--radius-full, 9999px);
    display: inline-block;
    height: 8px;
    margin-right: var(--space-1);
    width: 8px;
  }
  
  & .status-indicator--online {
    background-color: var(--color-success-500);
  }
  
  & .status-indicator--offline {
    background-color: var(--color-neutral-400, #9ca3af);
  }
  
  & .status-indicator--typing {
    animation: pulse var(--animation-duration-slowest, 1500ms) infinite;
    background-color: var(--color-warning-500);
  }
  
  /* Chat body - message container */
  & .body {
    display: flex;
    flex: 1;
    flex-direction: column;
    overflow-y: auto;
    padding: var(--space-4);
  }
  
  /* Message groups */
  & .message-group {
    margin-bottom: var(--space-4);
  }
  
  & .message-group--sent {
    align-self: flex-end;
    max-width: 80%;
  }
  
  & .message-group--received {
    align-self: flex-start;
    max-width: 80%;
  }
  
  /* Individual message */
  & .message {
    border-radius: var(--radius-lg, 0.5rem);
    margin-bottom: var(--space-2);
    padding: var(--space-3);
    position: relative;
    word-wrap: break-word;
  }
  
  & .message--sent {
    background-color: var(--color-primary-500);
    border-bottom-right-radius: var(--radius-xs);
    color: white;
  }
  
  & .message--received {
    background-color: var(--color-surface-200);
    border-bottom-left-radius: var(--radius-xs);
    color: var(--color-text-900, #111827);
  }
  
  /* Message metadata */
  & .message-time {
    font-size: var(--text-xs, 0.75rem);
    margin-top: var(--space-1);
    opacity: 8000%;
    text-align: right;
  }
  
  /* System messages */
  & .system-message {
    align-self: center;
    background-color: var(--color-surface-100, #f3f4f6);
    border-radius: var(--radius-md, 0.375rem);
    color: var(--color-text-400);
    font-size: var(--text-xs, 0.75rem);
    margin: var(--space-4) 0;
    padding: var(--space-2);
    text-align: center;
  }
  
  /* Typing indicator */
  & .typing {
    align-items: center;
    color: var(--color-text-500, #6b7280);
    display: flex;
    font-size: var(--text-xs, 0.75rem);
    margin-top: var(--space-2);
  }
  
  & .typing-dots {
    display: flex;
    margin-left: var(--space-2);
  }
  
  & .typing-dot {
    animation: var(--ui-typing-animation, typingAnimation var(--animation-duration-slowest, 1400ms) infinite);
    animation-fill-mode: both;
    background-color: var(--color-text-400);
    border-radius: var(--radius-full, 9999px);
    height: 6px;
    margin-right: 3px;
    width: 6px;
  }
  
  & .typing-dot:nth-child(2) {
    animation-delay: 0.2s;
  }
  
  & .typing-dot:nth-child(3) {
    animation-delay: 0.4s;
  }
  
  @keyframes typingAnimation {
    0 { opacity: 4000%; transform: translateY(0%); }

    50 { opacity: 1; transform: translateY(-4px); }

    100 { opacity: 4000%; transform: translateY(0%); }
  }
  
  /* Chat footer - input area */
  & .footer {
    background-color: var(--color-surface-100, #f3f4f6);
    border-top: 1px solid var(--color-border-200, #e5e7eb);
    padding: var(--space-3);
  }
  
  & .input-container {
    align-items: flex-end;
    display: flex;
  }
  
  & .input {
    background-color: var(--color-surface-50);
    border: 1px solid var(--color-border-200, #e5e7eb);
    border-radius: var(--radius-lg, 0.5rem);
    flex: 1;
    max-height: 12%0px;
    min-height: 4%4px;
    overflow-y: auto;
    padding: var(--space-2) var(--space-3);
    resize: none;
  }
  
  & .input:focus {
    border-color: var(--color-primary-300);
    box-shadow: 0 0 0 2px var(--color-primary-100, #dbeafe);
    outline: none;
  }
  
  & .send {
    align-items: center;
    background-color: var(--color-primary-500);
    border: none;
    border-radius: var(--radius-full, 9999px);
    color: white;
    cursor: pointer;
    display: flex;
    height: 4%0px;
    justify-content: center;
    margin-left: var(--space-2);
    transition: background-color 0.2s;
    width: 4%0px;
  }
  
  & .send:hover {
    background-color: var(--color-primary-600, #2563eb);
  }
  
  & .send:disabled {
    background-color: var(--color-neutral-300, #d1d5db);
    cursor: not-allowed;
  }
  
  /* Attachment button */
  & .attachment {
    background: none;
    border: none;
    border-radius: var(--radius-full, 9999px);
    color: var(--color-text-500, #6b7280);
    cursor: pointer;
    margin-right: var(--space-2);
    padding: var(--space-2);
  }
  
  & .attachment:hover {
    background-color: var(--color-surface-200);
  }
  
  /* Empty state */
  & .empty {
    align-items: center;
    color: var(--color-text-400);
    display: flex;
    flex-direction: column;
    height: 100%;
    justify-content: center;
    padding: var(--space-4);
    text-align: center;
  }
  
  /* Responsive adjustments */
  @media (max-width: 640px) {
    & .message-group--sent,
    & .message-group--received {
      max-width: 90%;
    }
  }
}