/* 채팅방 전용 스타일 */

.chat-container {
    height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--gray-50);
    position: relative;
    overflow: hidden;
}

/* ===== 채팅 헤더 ===== */
.chat-header {
    background: white;
    border-bottom: 1px solid var(--gray-200);
    padding: var(--space-md) var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    box-shadow: var(--shadow-sm);
    z-index: 10;
    min-height: 70px;
}

.back-btn {
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.back-btn:hover {
    background: var(--gray-100);
}

.chat-user-info {
    flex: 1;
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.user-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--gray-200);
}

.user-details h3 {
    font-size: var(--text-lg);
    font-weight: 600;
    margin: 0 0 2px 0;
    color: var(--gray-800);
}

.user-status {
    font-size: var(--text-sm);
    color: var(--success-color);
    font-weight: 500;
}

.user-status.expired {
    color: var(--error-color);
}

.chat-actions {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.action-btn {
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.action-btn:hover {
    background: var(--gray-100);
}

/* ===== 채팅 메시지 영역 ===== */
.chat-messages {
    flex: 1;
    padding: var(--space-lg);
    overflow-y: auto;
    scroll-behavior: smooth;
    background: var(--gray-50);
    position: relative;
}

.chat-messages::-webkit-scrollbar {
    width: 6px;
}

.chat-messages::-webkit-scrollbar-track {
    background: var(--gray-100);
    border-radius: 10px;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: 10px;
}

.chat-messages::-webkit-scrollbar-thumb:hover {
    background: var(--gray-400);
}

/* 로딩 스피너 */
.loading-spinner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 200px;
    gap: var(--space-md);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--gray-200);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 메시지 컨테이너 */
.message {
    display: flex;
    margin-bottom: var(--space-lg);
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message.own {
    justify-content: flex-end;
}

.message-bubble {
    max-width: 70%;
    min-width: 60px;
    padding: var(--space-md);
    border-radius: 18px;
    position: relative;
    word-wrap: break-word;
    box-shadow: var(--shadow-sm);
}

.message.own .message-bubble {
    background: var(--gradient-primary);
    color: white;
    border-bottom-right-radius: 6px;
}

.message:not(.own) .message-bubble {
    background: white;
    color: var(--gray-800);
    border-bottom-left-radius: 6px;
    border: 1px solid var(--gray-200);
}

.message-content {
    font-size: var(--text-base);
    line-height: 1.4;
    margin-bottom: var(--space-xs);
}

.message-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-sm);
    margin-top: var(--space-xs);
}

.message-time {
    font-size: var(--text-xs);
    opacity: 0.7;
}

.message.own .message-time {
    color: rgba(255, 255, 255, 0.8);
}

.message-status {
    font-size: var(--text-xs);
    opacity: 0.8;
}

.message.own .message-status {
    color: rgba(255, 255, 255, 0.8);
}

/* 빈 상태 */
.messages-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 300px;
    text-align: center;
    color: var(--gray-500);
}

.messages-empty i {
    font-size: 48px;
    margin-bottom: var(--space-md);
    opacity: 0.5;
}

.messages-empty h4 {
    font-size: var(--text-lg);
    margin-bottom: var(--space-sm);
    font-weight: 500;
}

/* ===== 채팅 입력 영역 ===== */
.chat-input-container {
    background: white;
    border-top: 1px solid var(--gray-200);
    padding: var(--space-lg);
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
}

.input-wrapper {
    display: flex;
    gap: var(--space-md);
    align-items: flex-end;
    max-width: 100%;
}

.message-input {
    flex: 1;
    padding: var(--space-md) var(--space-lg);
    border: 2px solid var(--gray-200);
    border-radius: 25px;
    font-size: var(--text-base);
    font-family: inherit;
    outline: none;
    transition: all 0.2s ease;
    resize: none;
    min-height: 48px;
    max-height: 120px;
    overflow-y: auto;
}

.message-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.send-btn {
    width: 48px;
    height: 48px;
    border: none;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    color: white;
    box-shadow: var(--shadow-md);
}

.send-btn:hover:not(:disabled) {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.send-btn:disabled {
    background: var(--gray-300);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* ===== 채팅 만료 알림 ===== */
.chat-expired-notice {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    backdrop-filter: blur(4px);
}

.expired-content {
    background: white;
    padding: var(--space-2xl);
    border-radius: var(--border-radius-lg);
    text-align: center;
    max-width: 300px;
    box-shadow: var(--shadow-xl);
}

.expired-content i {
    font-size: 48px;
    color: var(--error-color);
    margin-bottom: var(--space-lg);
}

.expired-content h4 {
    font-size: var(--text-xl);
    margin-bottom: var(--space-md);
    color: var(--gray-800);
}

.expired-content p {
    color: var(--gray-600);
    line-height: 1.5;
}

/* ===== 반응형 디자인 ===== */
@media (max-width: 768px) {
    .chat-header {
        padding: var(--space-md);
    }
    
    .chat-messages {
        padding: var(--space-md);
    }
    
    .chat-input-container {
        padding: var(--space-md);
    }
    
    .message-bubble {
        max-width: 85%;
    }
    
    .user-avatar {
        width: 40px;
        height: 40px;
    }
    
    .user-details h3 {
        font-size: var(--text-base);
    }
}