/* ============================================
   TaskHub - Estilos do Chat
   ============================================ */

.chat-layout {
    display: grid;
    grid-template-columns: 320px 1fr;
    height: calc(100vh - 88px);
    background: var(--bg-card);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    overflow: hidden;
}

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

.chat-sidebar-header {
    padding: 16px;
    border-bottom: 1px solid var(--border);
}

.chat-sidebar-header h3 {
    font-size: 1.1rem;
}

.chat-search {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
}

.chat-search .form-input {
    padding: 8px 12px;
    font-size: 0.85rem;
    border-radius: var(--radius-full);
}

.conversations-list {
    flex: 1;
    overflow-y: auto;
}

.conversation-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    cursor: pointer;
    transition: var(--transition);
    border-bottom: 1px solid var(--border);
}

.conversation-item:hover,
.conversation-item.active {
    background: rgba(108,99,255,0.05);
}

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

.conversation-item .conv-info {
    flex: 1;
    min-width: 0;
}

.conversation-item .conv-name {
    font-weight: 600;
    font-size: 0.9rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.conversation-item .conv-task {
    font-size: 0.75rem;
    color: var(--primary);
}

.conversation-item .conv-last-msg {
    font-size: 0.8rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-top: 2px;
}

.conversation-item .conv-time {
    font-size: 0.7rem;
    color: var(--text-muted);
}

.unread-badge {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    font-size: 0.65rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Chat principal */
.chat-main {
    display: flex;
    flex-direction: column;
}

.chat-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 20px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-card);
}

.chat-header .chat-user-info h4 {
    font-size: 0.95rem;
}

.chat-header .chat-task-title {
    font-size: 0.8rem;
    color: var(--primary);
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    background: var(--bg);
}

.message {
    display: flex;
    gap: 8px;
    max-width: 75%;
    animation: fadeIn 0.2s ease;
}

.message.sent {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.message-bubble {
    padding: 10px 14px;
    border-radius: 16px;
    font-size: 0.9rem;
    line-height: 1.5;
    position: relative;
}

.message.received .message-bubble {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-bottom-left-radius: 4px;
}

.message.sent .message-bubble {
    background: var(--primary);
    color: #fff;
    border-bottom-right-radius: 4px;
}

.message-time {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 4px;
    text-align: right;
}

.message.sent .message-time {
    color: rgba(255,255,255,0.7);
}

.chat-date-separator {
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-muted);
    padding: 8px;
}

/* Chat input */
.chat-input-area {
    padding: 14px 20px;
    border-top: 1px solid var(--border);
    background: var(--bg-card);
}

.chat-input-form {
    display: flex;
    gap: 8px;
    align-items: center;
}

.chat-input-form .form-input {
    flex: 1;
    border-radius: var(--radius-full);
    padding: 10px 16px;
}

.chat-input-form .btn-send {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Empty chat state */
.chat-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-muted);
    text-align: center;
    padding: 24px;
}

.chat-empty i {
    font-size: 3rem;
    margin-bottom: 12px;
    opacity: 0.3;
}

@media (max-width: 768px) {
    .chat-layout {
        grid-template-columns: 1fr;
    }
    .chat-sidebar {
        display: none;
    }
    .chat-sidebar.mobile-show {
        display: flex;
        position: fixed;
        inset: 0;
        z-index: 100;
        background: var(--bg-card);
    }
    .message {
        max-width: 85%;
    }
}