/**
 * Contacts Manager - Messaging System Styles
 * Comprehensive styles for the messaging/chat interface
 * Version 4.0.0
 */

/* ========================================
   Messaging CSS Custom Properties
   ======================================== */
:root {
    /* Messaging-specific variables */
    --messaging-bg: var(--bg-secondary);
    --messaging-sidebar-width: 22rem;
    --messaging-header-height: 4rem;
    --messaging-input-height: 4.5rem;

    /* Message bubble colors */
    --message-sent-bg: var(--color-primary);
    --message-sent-text: #ffffff;
    --message-received-bg: var(--bg-primary);
    --message-received-text: var(--text-primary);
    --message-system-bg: var(--bg-tertiary);
    --message-system-text: var(--text-muted);

    /* Message meta colors */
    --message-text-color: var(--text-primary);
    --message-meta-color: var(--text-muted);
    --message-time-color: var(--text-tertiary);

    /* Badge and indicator colors */
    --unread-badge-bg: var(--color-danger);
    --unread-badge-text: #ffffff;
    --typing-dot-color: var(--color-primary);

    /* Conversation colors */
    --conversation-hover-bg: var(--bg-hover);
    --conversation-active-bg: var(--bg-selected);
    --conversation-unread-bg: rgba(99, 102, 241, 0.05);
}

/* Dark Theme Overrides */
[data-theme="dark"] {
    --messaging-bg: var(--bg-secondary);
    --message-sent-bg: var(--color-primary);
    --message-sent-text: #ffffff;
    --message-received-bg: var(--bg-tertiary);
    --message-received-text: var(--text-primary);
    --message-system-bg: var(--bg-secondary);
    --message-system-text: var(--text-muted);
    --conversation-unread-bg: rgba(129, 140, 248, 0.08);
}

/* ========================================
   1. Messaging Container Layout
   ======================================== */
.messaging-container {
    display: flex;
    height: 100%;
    background-color: var(--messaging-bg);
    overflow: hidden;
}

.messaging-sidebar {
    width: var(--messaging-sidebar-width);
    height: 100%;
    background-color: var(--bg-primary);
    border-right: 1px solid var(--border-primary);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    overflow: hidden;
    transition: transform var(--transition-slow), width var(--transition-slow);
}

.messaging-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    background-color: var(--messaging-bg);
    position: relative;
}

/* Sidebar Header */
.messaging-sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-primary);
    flex-shrink: 0;
}

.messaging-sidebar-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.new-conversation-btn {
    width: 2.25rem;
    height: 2.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-primary);
}

.new-conversation-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

/* Search in Sidebar */
.messaging-search {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-primary);
}

.messaging-search-input {
    width: 100%;
    padding: 0.625rem 1rem 0.625rem 2.5rem;
    font-size: 0.875rem;
    font-family: inherit;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    outline: none;
    transition: all var(--transition-fast);
}

.messaging-search-input::placeholder {
    color: var(--text-muted);
}

.messaging-search-input:focus {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-focus);
}

.messaging-search-wrapper {
    position: relative;
}

.messaging-search-wrapper .search-icon {
    position: absolute;
    left: 0.875rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 0.875rem;
    pointer-events: none;
}

/* ========================================
   2. Conversation List
   ======================================== */
.conversation-list {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
}

.conversation-item {
    display: flex;
    align-items: center;
    gap: 0.875rem;
    padding: 0.875rem 1.25rem;
    cursor: pointer;
    transition: background-color var(--transition-fast);
    border-bottom: 1px solid var(--border-primary);
    position: relative;
}

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

.conversation-item.active {
    background-color: var(--conversation-active-bg);
}

.conversation-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background-color: var(--color-primary);
}

.conversation-item.unread {
    background-color: var(--conversation-unread-bg);
}

.conversation-item.unread .conversation-name {
    font-weight: 600;
    color: var(--text-primary);
}

.conversation-item.unread .conversation-preview {
    color: var(--text-secondary);
    font-weight: 500;
}

/* Conversation Avatar */
.conversation-avatar {
    width: 3rem;
    height: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-purple) 100%);
    border-radius: var(--radius-full);
    color: white;
    font-size: 1rem;
    font-weight: 600;
    flex-shrink: 0;
    position: relative;
}

.conversation-avatar.group {
    background: linear-gradient(135deg, var(--color-purple) 0%, var(--color-pink) 100%);
}

.conversation-avatar.group::after {
    content: '\f0c0';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    font-size: 0.625rem;
    position: absolute;
    bottom: -2px;
    right: -2px;
    width: 1.125rem;
    height: 1.125rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-primary);
    border: 2px solid var(--bg-primary);
    border-radius: var(--radius-full);
    color: var(--color-purple);
}

.conversation-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-full);
}

/* Conversation Info */
.conversation-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.conversation-name {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.conversation-preview {
    font-size: 0.8125rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Conversation Meta */
.conversation-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.375rem;
    flex-shrink: 0;
}

.conversation-time {
    font-size: 0.6875rem;
    color: var(--text-muted);
    white-space: nowrap;
}

.conversation-item.unread .conversation-time {
    color: var(--color-primary);
    font-weight: 500;
}

.unread-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 1.25rem;
    height: 1.25rem;
    padding: 0 0.375rem;
    background-color: var(--unread-badge-bg);
    color: var(--unread-badge-text);
    font-size: 0.6875rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    animation: badgePulse 2s ease-in-out infinite;
}

@keyframes badgePulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

/* ========================================
   3. Chat Header
   ======================================== */
.chat-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.875rem 1.25rem;
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-primary);
    flex-shrink: 0;
    min-height: var(--messaging-header-height);
}

.chat-back-btn {
    display: none;
    width: 2.25rem;
    height: 2.25rem;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

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

.chat-header-avatar {
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-purple) 100%);
    border-radius: var(--radius-full);
    color: white;
    font-size: 0.875rem;
    font-weight: 600;
    flex-shrink: 0;
}

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

.chat-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-subtitle {
    font-size: 0.75rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-subtitle.online {
    color: var(--color-success);
}

.chat-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-shrink: 0;
}

.chat-action-btn {
    width: 2.25rem;
    height: 2.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-tertiary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

/* ========================================
   4. Messages Area
   ======================================== */
.messages-container {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 1rem;
    display: flex;
    flex-direction: column;
}

.messages-list {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    margin-top: auto;
}

.message-group {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

/* Date Divider */
.date-divider {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 0;
    margin: 0.5rem 0;
}

.date-divider-text {
    padding: 0.375rem 1rem;
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
}

/* ========================================
   5. Message Bubbles
   ======================================== */
.message {
    display: flex;
    align-items: flex-end;
    gap: 0.5rem;
    max-width: 70%;
    margin-bottom: 0.25rem;
    animation: messageAppear 0.3s ease-out;
}

@keyframes messageAppear {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.message.received {
    margin-right: auto;
}

.message.system {
    max-width: 100%;
    justify-content: center;
    margin: 0.5rem 0;
}

.message.consecutive {
    margin-bottom: 0.125rem;
}

.message.consecutive .message-avatar {
    visibility: hidden;
}

.message.sent.consecutive {
    margin-right: 0;
}

.message.received.consecutive {
    padding-left: 2.5rem;
}

/* Message Avatar */
.message-avatar {
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-purple) 100%);
    border-radius: var(--radius-full);
    color: white;
    font-size: 0.6875rem;
    font-weight: 600;
    flex-shrink: 0;
}

.message-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-full);
}

/* Message Content */
.message-content {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.message-bubble {
    padding: 0.625rem 1rem;
    border-radius: var(--radius-lg);
    position: relative;
    word-wrap: break-word;
    word-break: break-word;
}

.message.sent .message-bubble {
    background-color: var(--message-sent-bg);
    color: var(--message-sent-text);
    border-bottom-right-radius: var(--radius-xs);
}

.message.received .message-bubble {
    background-color: var(--message-received-bg);
    color: var(--message-received-text);
    border: 1px solid var(--border-primary);
    border-bottom-left-radius: var(--radius-xs);
}

.message.system .message-bubble {
    background-color: var(--message-system-bg);
    color: var(--message-system-text);
    padding: 0.5rem 1rem;
    font-size: 0.8125rem;
    text-align: center;
}

.message-text {
    font-size: 0.9375rem;
    line-height: 1.5;
}

/* Message Meta */
.message-meta {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.6875rem;
    color: var(--message-meta-color);
    padding: 0 0.25rem;
}

.message.sent .message-meta {
    justify-content: flex-end;
    color: rgba(255, 255, 255, 0.7);
}

.message-time {
    color: inherit;
}

.message-status {
    display: flex;
    align-items: center;
    font-size: 0.75rem;
}

.message-status.sent {
    color: rgba(255, 255, 255, 0.5);
}

.message-status.delivered {
    color: rgba(255, 255, 255, 0.7);
}

.message-status.read {
    color: var(--color-info);
}

.message-edited {
    font-style: italic;
    font-size: 0.625rem;
}

/* Edited Indicator */
.message.edited .message-bubble::after {
    content: '(edited)';
    display: inline;
    margin-left: 0.375rem;
    font-size: 0.625rem;
    font-style: italic;
    opacity: 0.7;
}

/* Message Actions (Hover) */
.message-actions {
    position: absolute;
    top: -0.5rem;
    display: flex;
    gap: 0.25rem;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
    background-color: var(--bg-elevated);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    padding: 0.25rem;
    box-shadow: var(--shadow-md);
}

.message.sent .message-actions {
    right: 0;
}

.message.received .message-actions {
    left: 2.5rem;
}

.message:hover .message-actions {
    opacity: 1;
    visibility: visible;
}

.message-action-btn {
    width: 1.75rem;
    height: 1.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.75rem;
}

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

.message-action-btn.danger:hover {
    background-color: var(--color-danger-light);
    color: var(--color-danger);
}

/* Reply Preview */
.message-reply-preview {
    padding: 0.5rem 0.75rem;
    margin-bottom: 0.375rem;
    background-color: rgba(0, 0, 0, 0.1);
    border-left: 3px solid rgba(255, 255, 255, 0.5);
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    opacity: 0.9;
}

.message.received .message-reply-preview {
    background-color: var(--bg-tertiary);
    border-left-color: var(--color-primary);
}

.message-reply-author {
    font-weight: 600;
    font-size: 0.75rem;
    margin-bottom: 0.125rem;
}

.message-reply-text {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ========================================
   6. Message Input
   ======================================== */
.message-input-container {
    padding: 0.875rem 1.25rem;
    background-color: var(--bg-primary);
    border-top: 1px solid var(--border-primary);
    flex-shrink: 0;
}

.message-input-wrapper {
    display: flex;
    align-items: flex-end;
    gap: 0.75rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    padding: 0.5rem;
    transition: all var(--transition-fast);
}

.message-input-wrapper:focus-within {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-focus);
}

.message-attach-btn {
    width: 2.25rem;
    height: 2.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-tertiary);
    cursor: pointer;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.message-attach-btn:hover {
    background-color: var(--bg-hover);
    color: var(--color-primary);
}

.message-textarea {
    flex: 1;
    min-height: 2.25rem;
    max-height: 8rem;
    padding: 0.5rem 0.75rem;
    font-size: 0.9375rem;
    font-family: inherit;
    color: var(--text-primary);
    background: transparent;
    border: none;
    outline: none;
    resize: none;
    line-height: 1.5;
}

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

.message-send-btn {
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    border: none;
    border-radius: var(--radius-lg);
    color: white;
    cursor: pointer;
    transition: all var(--transition-fast);
    flex-shrink: 0;
    box-shadow: var(--shadow-primary);
}

.message-send-btn:hover:not(:disabled) {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.message-send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.char-counter {
    position: absolute;
    right: 4rem;
    bottom: 0.5rem;
    font-size: 0.6875rem;
    color: var(--text-muted);
}

.char-counter.warning {
    color: var(--color-warning);
}

.char-counter.danger {
    color: var(--color-danger);
}

/* Reply Preview in Input */
.input-reply-preview {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.625rem 1rem;
    margin-bottom: 0.5rem;
    background-color: var(--bg-secondary);
    border-left: 3px solid var(--color-primary);
    border-radius: var(--radius-md);
}

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

.input-reply-author {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 0.125rem;
}

.input-reply-text {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.input-reply-close {
    width: 1.5rem;
    height: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.input-reply-close:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

/* ========================================
   7. Participants Panel
   ======================================== */
.participants-panel {
    position: absolute;
    top: 0;
    right: 0;
    width: 20rem;
    height: 100%;
    background-color: var(--bg-primary);
    border-left: 1px solid var(--border-primary);
    display: flex;
    flex-direction: column;
    transform: translateX(100%);
    transition: transform var(--transition-slow);
    z-index: 10;
    box-shadow: var(--shadow-xl);
}

.participants-panel.open {
    transform: translateX(0);
}

.participants-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-primary);
}

.participants-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.participants-close {
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.participants-close:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.participants-list {
    flex: 1;
    overflow-y: auto;
    padding: 0.5rem;
}

.participant-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
}

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

.participant-avatar {
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-purple) 100%);
    border-radius: var(--radius-full);
    color: white;
    font-size: 0.875rem;
    font-weight: 600;
    flex-shrink: 0;
}

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

.participant-name {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.participant-role {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.125rem 0.5rem;
    font-size: 0.625rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--radius-full);
    margin-top: 0.25rem;
}

.participant-role.owner {
    background-color: var(--color-warning-light);
    color: var(--color-warning);
}

.participant-role.admin {
    background-color: var(--color-purple-light);
    color: var(--color-purple);
}

.participant-actions {
    display: flex;
    gap: 0.25rem;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.participant-item:hover .participant-actions {
    opacity: 1;
}

.participant-action-btn {
    width: 1.75rem;
    height: 1.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.participant-action-btn:hover {
    background-color: var(--bg-active);
    color: var(--color-primary);
}

.participant-action-btn.danger:hover {
    background-color: var(--color-danger-light);
    color: var(--color-danger);
}

/* ========================================
   8. Empty States
   ======================================== */
.no-conversations,
.no-messages,
.start-conversation {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 2rem;
    text-align: center;
    height: 100%;
}

.empty-icon {
    width: 5rem;
    height: 5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary-50) 0%, var(--color-primary-100) 100%);
    border-radius: var(--radius-2xl);
    margin-bottom: 1.5rem;
}

.empty-icon i {
    font-size: 2rem;
    color: var(--color-primary);
}

.no-conversations h3,
.no-messages h3,
.start-conversation h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.no-conversations p,
.no-messages p,
.start-conversation p {
    font-size: 0.9375rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    max-width: 18rem;
}

.start-conversation .btn {
    margin-top: 0.5rem;
}

/* ========================================
   9. Loading States
   ======================================== */
.messages-loading,
.conversation-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    gap: 1rem;
}

.messages-loading .loading-spinner,
.conversation-loading .loading-spinner {
    font-size: 2rem;
    color: var(--color-primary);
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.messages-loading p,
.conversation-loading p {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.load-more-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    padding: 0.75rem;
    margin-bottom: 1rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.load-more-btn:hover {
    background-color: var(--bg-hover);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.load-more-btn.loading {
    pointer-events: none;
    opacity: 0.7;
}

/* ========================================
   10. Typing Indicator
   ======================================== */
.typing-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0;
    margin-left: 2.5rem;
}

.typing-dots {
    display: flex;
    gap: 0.25rem;
}

.typing-dot {
    width: 0.5rem;
    height: 0.5rem;
    background-color: var(--typing-dot-color);
    border-radius: var(--radius-full);
    animation: typingDot 1.4s infinite ease-in-out;
}

.typing-dot:nth-child(1) {
    animation-delay: 0s;
}

.typing-dot:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-dot:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typingDot {
    0%, 60%, 100% {
        transform: translateY(0);
        opacity: 0.5;
    }
    30% {
        transform: translateY(-0.375rem);
        opacity: 1;
    }
}

.typing-text {
    font-size: 0.8125rem;
    color: var(--text-muted);
    font-style: italic;
}

/* ========================================
   11. New Conversation Modal
   ======================================== */
.new-conversation-modal .modal-container {
    max-width: 32rem;
}

.contact-picker {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    max-height: 20rem;
    overflow-y: auto;
    margin-bottom: 1rem;
}

.contact-picker-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background-color: var(--bg-secondary);
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.contact-picker-item:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--border-primary);
}

.contact-picker-item.selected {
    background-color: var(--color-primary-light);
    border-color: var(--color-primary);
}

.contact-picker-avatar {
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-purple) 100%);
    border-radius: var(--radius-full);
    color: white;
    font-size: 0.875rem;
    font-weight: 600;
    flex-shrink: 0;
}

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

.contact-picker-name {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-primary);
}

.contact-picker-email {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.contact-picker-check {
    width: 1.25rem;
    height: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-tertiary);
    border: 2px solid var(--border-secondary);
    border-radius: var(--radius-full);
    color: transparent;
    font-size: 0.625rem;
    transition: all var(--transition-fast);
}

.contact-picker-item.selected .contact-picker-check {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
}

/* Selected Contacts Pills */
.selected-contacts {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
    min-height: 2.5rem;
    padding: 0.5rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
}

.selected-contact-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.625rem 0.375rem 0.375rem;
    background-color: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    font-weight: 500;
}

.selected-contact-pill .pill-avatar {
    width: 1.5rem;
    height: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-purple) 100%);
    border-radius: var(--radius-full);
    color: white;
    font-size: 0.5rem;
    font-weight: 600;
}

.selected-contact-pill .pill-remove {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 1rem;
    height: 1rem;
    background: transparent;
    border: none;
    border-radius: var(--radius-full);
    color: var(--color-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-left: 0.125rem;
}

.selected-contact-pill .pill-remove:hover {
    background-color: var(--color-primary);
    color: white;
}

/* Group Name Input */
.group-name-input {
    margin-bottom: 1rem;
}

.group-name-input label {
    display: block;
    margin-bottom: 0.375rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.group-name-input input {
    width: 100%;
    padding: 0.625rem 0.875rem;
    font-size: 0.9375rem;
    font-family: inherit;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    outline: none;
    transition: all var(--transition-fast);
}

.group-name-input input:focus {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-focus);
}

/* ========================================
   12. Dark Mode - Additional Overrides
   ======================================== */
[data-theme="dark"] .message.sent .message-bubble {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
}

[data-theme="dark"] .conversation-item.active::before {
    background-color: var(--color-primary);
}

[data-theme="dark"] .message-input-wrapper {
    background-color: var(--bg-tertiary);
}

[data-theme="dark"] .new-conversation-btn,
[data-theme="dark"] .message-send-btn {
    box-shadow: 0 4px 14px rgba(129, 140, 248, 0.3);
}

[data-theme="dark"] .participants-panel {
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.3);
}

/* ========================================
   13. Mobile Responsive
   ======================================== */
@media (max-width: 64rem) {
    :root {
        --messaging-sidebar-width: 18rem;
    }
}

@media (max-width: 48rem) {
    .messaging-container {
        position: relative;
    }

    .messaging-sidebar {
        position: absolute;
        left: 0;
        top: 0;
        bottom: 0;
        width: 100%;
        z-index: 20;
        transform: translateX(0);
    }

    .messaging-sidebar.hidden-mobile {
        transform: translateX(-100%);
    }

    .messaging-main {
        width: 100%;
    }

    .chat-back-btn {
        display: flex;
    }

    .message {
        max-width: 85%;
    }

    .participants-panel {
        width: 100%;
    }

    /* Touch-friendly tap targets */
    .conversation-item {
        padding: 1rem 1.25rem;
    }

    .chat-action-btn,
    .message-attach-btn {
        width: 2.75rem;
        height: 2.75rem;
    }

    .message-send-btn {
        width: 3rem;
        height: 3rem;
    }

    .message-input-wrapper {
        padding: 0.625rem;
    }

    .message-textarea {
        font-size: 1rem;
    }
}

@media (max-width: 30rem) {
    .conversation-preview {
        max-width: 10rem;
    }

    .chat-title {
        font-size: 0.9375rem;
    }

    .message-bubble {
        padding: 0.5rem 0.875rem;
    }

    .message-text {
        font-size: 0.875rem;
    }
}

/* ========================================
   14. Animations
   ======================================== */
/* Conversation transition */
.conversation-item {
    animation: conversationSlideIn 0.3s ease-out;
}

@keyframes conversationSlideIn {
    from {
        opacity: 0;
        transform: translateX(-10px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Sidebar slide animation */
.messaging-sidebar {
    transition: transform var(--transition-slow) cubic-bezier(0.4, 0, 0.2, 1);
}

/* Panel slide animation */
.participants-panel {
    transition: transform var(--transition-slow) cubic-bezier(0.4, 0, 0.2, 1);
}

/* Message bubble hover effect */
.message-bubble {
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.message:hover .message-bubble {
    transform: translateY(-1px);
}

/* Unread badge pulse animation */
.unread-badge {
    animation: badgePulse 2s ease-in-out infinite;
}

/* Send button animation */
.message-send-btn {
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.message-send-btn:active:not(:disabled) {
    transform: scale(0.95);
}

/* New conversation button */
.new-conversation-btn:active {
    transform: scale(0.95);
}

/* Contact picker selection animation */
.contact-picker-item {
    transition: all var(--transition-fast);
}

.contact-picker-item.selected {
    animation: selectionPop 0.2s ease-out;
}

@keyframes selectionPop {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.02);
    }
    100% {
        transform: scale(1);
    }
}

/* Loading skeleton animation */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--bg-secondary) 25%,
        var(--bg-tertiary) 50%,
        var(--bg-secondary) 75%
    );
    background-size: 200% 100%;
    animation: skeletonShimmer 1.5s ease-in-out infinite;
}

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

/* ========================================
   15. Utility Classes
   ======================================== */
.messaging-hidden {
    display: none !important;
}

.messaging-visible {
    display: flex !important;
}

/* Online status indicator */
.online-indicator {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 0.75rem;
    height: 0.75rem;
    background-color: var(--color-success);
    border: 2px solid var(--bg-primary);
    border-radius: var(--radius-full);
}

.online-indicator.away {
    background-color: var(--color-warning);
}

.online-indicator.offline {
    background-color: var(--text-muted);
}

/* Message attachment preview */
.message-attachment {
    margin-top: 0.5rem;
    padding: 0.5rem;
    background-color: rgba(0, 0, 0, 0.1);
    border-radius: var(--radius-md);
}

.message.received .message-attachment {
    background-color: var(--bg-secondary);
}

.message-attachment-icon {
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    color: var(--color-primary);
    margin-right: 0.5rem;
}

.message-attachment-info {
    flex: 1;
}

.message-attachment-name {
    font-size: 0.8125rem;
    font-weight: 500;
}

.message-attachment-size {
    font-size: 0.6875rem;
    color: var(--text-muted);
}

/* ========================================
   16. Print Styles
   ======================================== */
@media print {
    .messaging-sidebar,
    .message-input-container,
    .chat-actions,
    .participants-panel {
        display: none !important;
    }

    .messaging-main {
        width: 100%;
    }

    .message {
        break-inside: avoid;
    }
}

/* ========================================
   17. Reduced Motion
   ======================================== */
@media (prefers-reduced-motion: reduce) {
    .message,
    .conversation-item,
    .typing-dot,
    .unread-badge,
    .skeleton {
        animation: none !important;
    }

    .messaging-sidebar,
    .participants-panel,
    .message-bubble {
        transition: none !important;
    }
}

/* ========================================
   18. Focus Styles
   ======================================== */
.conversation-item:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: -2px;
}

.message-textarea:focus-visible {
    outline: none;
}

.chat-action-btn:focus-visible,
.message-action-btn:focus-visible,
.participant-action-btn:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.contact-picker-item:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: -2px;
}