/* 产品需求分析智能体 - 前端样式 */

:root {
    --primary-color: #409eff;
    --success-color: #67c23a;
    --warning-color: #e6a23c;
    --danger-color: #f56c6c;
    --bg-color: #f5f7fa;
    --sidebar-bg: #fff;
    --chat-bg: #f0f2f5;
    --border-color: #e4e7ed;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-color);
    height: 100vh;
    overflow: hidden;
}

#app {
    height: 100vh;
}

/* 布局 */
.layout {
    display: flex;
    height: 100vh;
}

/* 侧边栏 */
.sidebar {
    width: 280px;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-header h3 {
    font-size: 16px;
    color: #303133;
    margin-bottom: 15px;
}

.btn-new-chat {
    width: 100%;
    padding: 10px;
    background: var(--primary-color);
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
}

.btn-new-chat:hover {
    background: #66b1ff;
}

.session-list {
    flex: 1;
    overflow-y: auto;
    padding: 10px;
}

.session-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px;
    margin-bottom: 5px;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.2s;
}

.session-item:hover {
    background: #f5f7fa;
}

.session-item.active {
    background: #ecf5ff;
    color: var(--primary-color);
}

.session-preview {
    font-size: 13px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
}

.btn-delete {
    background: none;
    border: none;
    color: #c0c4cc;
    cursor: pointer;
    font-size: 16px;
    padding: 0 5px;
    opacity: 0;
    transition: opacity 0.2s;
}

.session-item:hover .btn-delete {
    opacity: 1;
}

.btn-delete:hover {
    color: var(--danger-color);
}

/* 主聊天区 */
.chat-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--chat-bg);
}

/* 产品类型 Tab */
.product-tabs {
    display: flex;
    gap: 10px;
    padding: 15px 20px;
    background: #fff;
    border-bottom: 1px solid var(--border-color);
}

.product-tab {
    padding: 8px 16px;
    border: 1px solid var(--border-color);
    background: #fff;
    border-radius: 20px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
}

.product-tab:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.product-tab.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: #fff;
}

/* 消息区 */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}

.welcome-message {
    text-align: center;
    padding: 60px 20px;
    color: #606266;
}

.welcome-message h2 {
    font-size: 24px;
    margin-bottom: 15px;
    color: #303133;
}

.welcome-message p {
    font-size: 14px;
    margin-bottom: 30px;
}

.example-prompts {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

.example-prompt {
    padding: 10px 15px;
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    color: #606266;
    transition: all 0.2s;
}

.example-prompt:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* 消息 */
.message {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
    max-width: 85%;
}

.message.user {
    flex-direction: row-reverse;
    margin-left: auto;
}

.message-avatar {
    font-size: 24px;
    flex-shrink: 0;
}

.message-content {
    flex: 1;
}

.message-text {
    padding: 12px 16px;
    border-radius: 12px;
    font-size: 14px;
    line-height: 1.6;
    white-space: pre-wrap;
}

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

.message.assistant .message-text {
    background: #fff;
    color: #303133;
    border-bottom-left-radius: 4px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

/* 参数卡片 */
.params-card {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 15px;
    margin-top: 10px;
}

.params-card h4 {
    font-size: 13px;
    color: #909399;
    margin-bottom: 10px;
}

.param-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 8px;
}

.param-item {
    display: flex;
    flex-direction: column;
    background: #f5f7fa;
    padding: 8px 10px;
    border-radius: 4px;
}

.param-key {
    font-size: 11px;
    color: #909399;
}

.param-value {
    font-size: 14px;
    color: #303133;
    font-weight: 500;
}

.validation-badge {
    display: inline-block;
    margin-top: 10px;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 12px;
}

.validation-badge.valid {
    background: #f0f9eb;
    color: var(--success-color);
}

.validation-badge.invalid {
    background: #fef0f0;
    color: var(--danger-color);
}

/* 生成的图片 */
.generated-image {
    margin-top: 10px;
    background: #fff;
    border-radius: 8px;
    padding: 15px;
}

.generated-image h4 {
    font-size: 13px;
    color: #909399;
    margin-bottom: 10px;
}

.generated-image img {
    max-width: 100%;
    border-radius: 6px;
}

/* 输入区 */
.chat-input-area {
    background: #fff;
    border-top: 1px solid var(--border-color);
    padding: 15px 20px;
}

.quick-params {
    display: flex;
    gap: 15px;
    margin-bottom: 10px;
    align-items: center;
}

.quick-param-input {
    flex: 1;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 13px;
}

.include-image-check {
    font-size: 13px;
    color: #606266;
    display: flex;
    align-items: center;
    gap: 5px;
    cursor: pointer;
}

.input-row {
    display: flex;
    gap: 10px;
}

.input-row textarea {
    flex: 1;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    resize: none;
    font-size: 14px;
    font-family: inherit;
}

.input-row textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.btn-send {
    padding: 12px 24px;
    background: var(--primary-color);
    color: #fff;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
}

.btn-send:hover:not(:disabled) {
    background: #66b1ff;
}

.btn-send:disabled {
    background: #c0c4cc;
    cursor: not-allowed;
}

/* 上传按钮 */
.btn-upload {
    padding: 12px 16px;
    background: #f0f0f0;
    color: #666;
    border: 1px solid #ddd;
    border-radius: 8px;
    cursor: pointer;
    font-size: 18px;
    transition: all 0.2s;
}

.btn-upload:hover {
    background: #e0e0e0;
    border-color: #ccc;
}

/* 附件栏 */
.attachment-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 8px;
    background: #f8f8f8;
    border-radius: 8px;
    margin-bottom: 8px;
}

.attachment-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 12px;
    color: #333;
}

.attachment-item span {
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.att-remove {
    background: none;
    border: none;
    color: #999;
    cursor: pointer;
    font-size: 14px;
    padding: 0 2px;
}

.att-remove:hover {
    color: #e00;
}

/* 打字指示器 */
.typing-indicator {
    display: inline-flex;
    gap: 4px;
    padding: 10px;
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    background: #909399;
    border-radius: 50%;
    animation: typing 1.4s infinite;
}

.typing-indicator span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typing {
    0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
    30% { transform: translateY(-8px); opacity: 1; }
}

/* Markdown 样式 */
.message-text h1, .message-text h2, .message-text h3 {
    margin: 10px 0;
}

.message-text h2 {
    font-size: 16px;
    color: #409eff;
}

.message-text h3 {
    font-size: 14px;
    color: #606266;
}

.message-text table {
    border-collapse: collapse;
    width: 100%;
    margin: 10px 0;
}

.message-text th, .message-text td {
    border: 1px solid #e4e7ed;
    padding: 8px;
    text-align: left;
}

.message-text th {
    background: #f5f7fa;
}

.message-text code {
    background: #f5f7fa;
    padding: 2px 6px;
    border-radius: 3px;
    font-family: monospace;
}

.message-text pre {
    background: #1e1e1e;
    color: #d4d4d4;
    padding: 12px;
    border-radius: 6px;
    overflow-x: auto;
    margin: 10px 0;
}

.message-text pre code {
    background: none;
    padding: 0;
}

.message-text ul, .message-text ol {
    margin: 10px 0;
    padding-left: 20px;
}

.message-text li {
    margin: 5px 0;
}