/**
 * AI聊天模块 - 聊天消息区域样式
 * 包含消息气泡、头像、打字指示器、图片/视频消息等样式
 */

.chat-area {
    flex-shrink: 0;
    padding: 20px;
    width: 100%;
    max-width: var(--chat-max-width);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s;
    padding-bottom: 180px;
}

.chat-area.active {
    opacity: 1;
    visibility: visible;
}

.message {
    display: flex;
    gap: 12px;
    line-height: 1.6;
    align-items: flex-start;
    animation: fadeIn 0.3s ease;
}

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

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

.avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
    background-size: cover;
    background-position: center;
    border: 1px solid var(--glass-border);
    box-shadow: 
        0 4px 16px rgba(22, 119, 255, 0.15),
        inset 0 1px 1px rgba(255, 255, 255, 0.3);
    transition: all 0.3s ease;
}

.avatar:hover {
    transform: scale(1.05);
    box-shadow: 
        0 6px 20px rgba(22, 119, 255, 0.25),
        inset 0 1px 1px rgba(255, 255, 255, 0.4);
}

.message.user .avatar {
    background-image: url('../images/avatar-user.jpg');
    order: 2;
}

.message.ai .avatar {
    background-image: url('../images/avatar-ai.jpg');
}

.bubble {
    padding: 12px 16px;
    border-radius: 18px;
    max-width: 70%;
    white-space: pre-wrap;
    word-wrap: break-word;
    position: relative;
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.bubble:hover {
    transform: translateY(-2px) scale(1.005);
}

.message.user .bubble {
    background: var(--user-glass-bg);
    border: 1px solid var(--user-glass-border);
    order: 1;
    border-bottom-right-radius: 6px;
    color: #fff;
    box-shadow: 
        0 8px 32px rgba(22, 119, 255, 0.25),
        inset 0 1px 1px rgba(255, 255, 255, 0.2);
}

.message.user .bubble:hover {
    background: var(--user-glass-bg-hover);
    box-shadow: 
        0 12px 40px rgba(22, 119, 255, 0.35),
        inset 0 1px 1px rgba(255, 255, 255, 0.3);
}

.message.ai .bubble {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-bottom-left-radius: 6px;
    color: var(--text-color);
    box-shadow: 
        0 8px 32px var(--glass-shadow),
        inset 0 1px 1px rgba(255, 255, 255, 0.5);
}

.message.ai .bubble:hover {
    background: var(--glass-bg-hover);
    box-shadow: 
        0 12px 40px rgba(22, 119, 255, 0.15),
        inset 0 1px 1px rgba(255, 255, 255, 0.6);
}

/* 响应式设计 - 小屏幕上消息显示在头像下方 */
@media (max-width: 480px) {
    .message {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .message.user {
        align-items: flex-end;
    }
    
    .message.user .avatar {
        order: 1;
    }
    
    .message.user .bubble {
        order: 2;
        margin-top: 8px;
    }
    
    .message.ai .bubble {
        margin-top: 8px;
    }
    
    .bubble {
        max-width: 100%;
    }
}

.message.ai .bubble strong {
    display: block;
    margin-bottom: 6px;
    color: var(--primary-color);
    font-size: 0.85rem;
    letter-spacing: 0.5px;
}

.message.user .bubble .message-files {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 8px;
}

.message.user .bubble .message-image {
    max-width: 200px;
    max-height: 200px;
    border-radius: 8px;
    object-fit: cover;
}

.message.user .bubble .message-video {
    max-width: 300px;
    max-height: 200px;
    border-radius: 8px;
}

.message.user .bubble .message-text {
    margin-bottom: 8px;
}

.typing-indicator {
    display: flex;
    gap: 4px;
    padding: 10px 15px;
    background: var(--glass-bg);
    border-radius: 12px;
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    animation: typing 1.4s infinite ease-in-out both;
    box-shadow: 0 2px 8px rgba(22, 119, 255, 0.3);
}

.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);
    }
    40% {
        transform: scale(1);
    }
}