/* ===================================
   Chat Styles
   =================================== */

/* Chat View */
.chat-view {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.chat-view.hidden {
    display: none;
}

/* Chat Header */
.chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.chat-user-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.chat-user-info .user-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--primary-color), #818cf8);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 14px;
}

.user-details {
    display: flex;
    flex-direction: column;
}

.chat-user-info .user-name {
    font-weight: 600;
    color: var(--text-primary);
}

.chat-user-info .user-status {
    font-size: 12px;
    color: var(--text-secondary);
}

.chat-user-info .user-status.online {
    color: var(--success-color);
}

.btn-close-chat {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: none;
    border-radius: var(--radius-md);
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

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

/* Messages Container */
.messages-container {
    flex: 1;
    overflow-y: auto;
    padding: 20px 24px;
    display: flex;
    flex-direction: column;
}

.messages-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* Message Bubble */
.message {
    max-width: 70%;
    display: flex;
    flex-direction: column;
    animation: fadeIn 0.2s ease;
}

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

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

.message.received {
    align-self: flex-start;
}

.message-bubble {
    padding: 12px 16px;
    border-radius: var(--radius-lg);
    word-wrap: break-word;
    line-height: 1.4;
}

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

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

.message-time {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 4px;
    padding: 0 4px;
}

.message.sent .message-time {
    text-align: right;
}

/* Topic Chat Specific */
.topic-chat-main {
    flex-direction: column;
}

.topic-description {
    padding: 16px 24px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.topic-description p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 14px;
}

.topic-chat-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.topic-chat-panel .messages-container {
    flex: 1;
}

.topic-chat-panel .message-input-container {
    flex-shrink: 0;
}

/* Topic Meta */
.topic-meta {
    font-size: 12px;
    color: var(--text-muted);
    margin-left: 12px;
}

.topic-meta .separator {
    margin: 0 8px;
}

.time-badge {
    background: var(--bg-tertiary);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    color: var(--warning-color);
    font-weight: 500;
}

/* Group Message (Topic Chat) */
.message.group-message {
    max-width: 80%;
}

.message.group-message .message-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 4px;
}

.message.group-message .sender-name {
    font-size: 12px;
    font-weight: 600;
    color: var(--primary-color);
}

.message.group-message .message-time {
    margin-top: 0;
}

/* Message Input */
.message-input-container {
    display: flex;
    gap: 12px;
    padding: 16px 24px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

.message-input {
    flex: 1;
    padding: 14px 20px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: 14px;
    outline: none;
    transition: var(--transition);
    background: var(--bg-tertiary);
}

.message-input:focus {
    border-color: var(--primary-color);
    background: var(--bg-secondary);
}

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

.btn-send {
    width: 48px;
    height: 48px;
    border: none;
    border-radius: var(--radius-lg);
    background: var(--primary-color);
    color: white;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-send:hover {
    background: var(--primary-hover);
    transform: scale(1.05);
}

.btn-send:active {
    transform: scale(0.95);
}

/* Typing Indicator */
.typing-indicator {
    padding: 8px 16px;
    margin-top: 8px;
}

.typing-indicator.hidden {
    display: none;
}

.typing-indicator span {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-muted);
    margin: 0 2px;
    animation: typing 1.4s infinite ease-in-out both;
}

.typing-indicator span:nth-child(1) { animation-delay: -0.32s; }
.typing-indicator span:nth-child(2) { animation-delay: -0.16s; }

@keyframes typing {
    0%, 80%, 100% { transform: scale(0.6); opacity: 0.4; }
    40% { transform: scale(1); opacity: 1; }
}

/* Responsive */
@media (max-width: 768px) {
    .message {
        max-width: 85%;
    }
    
    .message.group-message {
        max-width: 90%;
    }
    
    .messages-container {
        padding: 16px;
    }
    
    .message-input-container {
        padding: 12px 16px;
    }
}