/* 채팅 레이아웃 */
.chat-layout {
    display: flex;
    height: 100%;
}

/* 룸 리스트 패널 */
.chat-rooms-panel {
    width: 280px;
    min-width: 280px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
}

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

.rooms-header h3 { font-size: 0.9375rem; font-weight: 600; }

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

.room-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    border-radius: var(--radius);
    cursor: pointer;
    transition: background var(--transition);
}
.room-item:hover { background: var(--bg-hover); }
.room-item.active { background: var(--accent-muted); }

.room-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
}
.room-avatar img { width: 100%; height: 100%; object-fit: cover; }

.room-info { flex: 1; min-width: 0; }
.room-name { font-size: 0.875rem; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.room-preview { font-size: 0.75rem; color: var(--text-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.room-time { font-size: 0.6875rem; color: var(--text-muted); flex-shrink: 0; }

/* 채팅 메인 영역 */
.chat-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.chat-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border);
    background: var(--bg-secondary);
}

.chat-header-back {
    display: none;
}

.chat-header-name {
    flex: 1;
    font-weight: 600;
    font-size: 0.9375rem;
}

.chat-header-actions {
    display: flex;
    gap: 0.25rem;
}

/* 메시지 영역 */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.message {
    display: flex;
    gap: 0.75rem;
    max-width: 85%;
    animation: fadeIn 0.2s ease;
}

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

.message-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
}
.message-avatar img { width: 100%; height: 100%; object-fit: cover; }

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

.message-name {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.message.user .message-name { text-align: right; }

.message-content {
    padding: 0.75rem 1rem;
    border-radius: var(--radius-lg);
    font-size: 0.9375rem;
    line-height: 1.6;
    word-break: break-word;
}

.message.assistant .message-content {
    background: var(--ai-bubble);
    border-top-left-radius: 4px;
}

.message.user .message-content {
    background: var(--user-bubble);
    border-top-right-radius: 4px;
}

.message-content p { margin-bottom: 0.5rem; }
.message-content p:last-child { margin-bottom: 0; }
.message-content code { background: var(--bg-primary); padding: 0.15rem 0.35rem; border-radius: 3px; font-family: var(--font-mono); font-size: 0.85em; }
.message-content pre { background: var(--bg-primary); padding: 0.75rem; border-radius: var(--radius); overflow-x: auto; margin: 0.5rem 0; }
.message-content pre code { background: none; padding: 0; }
.message-content em { color: var(--accent-hover); font-style: italic; }
.message-content strong { font-weight: 600; }

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

.message-actions {
    display: flex;
    gap: 0.25rem;
    opacity: 0;
    transition: opacity var(--transition);
}
.message:hover .message-actions { opacity: 1; }

/* 스트리밍 커서 */
.streaming-cursor::after {
    content: '▌';
    animation: blink 0.8s infinite;
    color: var(--accent);
}
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }

/* 입력 영역 */
.chat-input-area {
    padding: 0.75rem 1rem;
    border-top: 1px solid var(--border);
    background: var(--bg-secondary);
}

.chat-input-wrap {
    display: flex;
    gap: 0.5rem;
    align-items: flex-end;
}

.chat-input {
    flex: 1;
    min-height: 44px;
    max-height: 160px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 0.625rem 1rem;
    resize: none;
    line-height: 1.5;
    font-size: 0.9375rem;
}
.chat-input:focus { border-color: var(--accent); }

.chat-send-btn {
    width: 44px;
    height: 44px;
    background: var(--accent);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: background var(--transition);
}
.chat-send-btn:hover { background: var(--accent-hover); }
.chat-send-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.chat-send-btn svg { color: #fff; }

/* 채팅 비선택 상태 */
.chat-empty {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 모바일 */
@media (max-width: 768px) {
    .chat-rooms-panel {
        position: absolute;
        top: 0;
        left: 0;
        bottom: 0;
        width: 100%;
        z-index: 10;
        transform: translateX(0);
        transition: transform var(--transition);
    }

    .chat-rooms-panel.hidden {
        transform: translateX(-100%);
    }

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

    .message { max-width: 92%; }
}