/**
 * Waywave 渡澜 - Chat 页面样式
 */

.chat-page {
    display: flex;
    height: 100vh;
    overflow: hidden;
    background-color: var(--color-bg);
}

/* ========================================
   侧边栏
   ======================================== */
.chat-sidebar {
    width: 280px;
    background-color: var(--color-bg-elevated);
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    padding: var(--spacing-md);
    transition: transform var(--transition-normal);
    z-index: 100;
}

.chat-sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
    padding: 0 var(--spacing-xs);
}

.chat-sidebar-logo {
    display: flex;
    align-items: baseline;
    gap: var(--spacing-xs);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
}

.chat-logo-zh {
    font-size: var(--font-size-sm);
    color: var(--brand-primary);
}

.chat-sidebar-close {
    display: none; /* 默认桌面端隐藏 */
    background: none;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    font-size: var(--font-size-lg);
}

.chat-back-btn {
    padding: 6px 12px;
    background: var(--color-bg-hover);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    cursor: pointer;
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
}

.chat-back-btn:hover {
    background: var(--color-bg);
    border-color: var(--brand-primary);
    color: var(--brand-primary);
}

.chat-new-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    width: 100%;
    padding: 10px;
    background: var(--brand-primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    margin-bottom: var(--spacing-lg);
    transition: all var(--transition-fast);
}

.chat-new-btn:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.chat-history {
    flex: 1;
    overflow-y: auto;
    margin-bottom: var(--spacing-md);
}

.chat-empty {
    text-align: center;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    padding-top: var(--spacing-xl);
}

.chat-history-item {
    padding: 10px;
    border-radius: var(--radius-md);
    cursor: pointer;
    margin-bottom: 4px;
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
    transition: background var(--transition-fast);
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.chat-history-item:hover {
    background: var(--color-bg-hover);
}

.chat-history-item.active {
    background: var(--color-bg-hover);
    font-weight: var(--font-weight-medium);
}

/* 对话标题 - 单行省略 */
.chat-history-title {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
    min-width: 0;
    padding-right: 24px; /* 为操作按钮留出空间 */
}

/* 对话时间 */
.chat-history-time {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

/* 操作按钮容器 */
.chat-history-actions {
    position: absolute;
    right: 6px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    gap: 2px;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.chat-history-item:hover .chat-history-actions {
    opacity: 1;
}

/* 操作按钮 */
.chat-history-action-btn {
    width: 24px;
    height: 24px;
    padding: 0;
    border: none;
    background: transparent;
    color: var(--color-text-muted);
    cursor: pointer;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    transition: all var(--transition-fast);
}

.chat-history-action-btn:hover {
    background: var(--color-bg);
    color: var(--color-text-primary);
}

.chat-history-action-btn.delete:hover {
    color: var(--color-error);
}

/* 重命名输入框 */
.chat-history-rename-input {
    width: 100%;
    padding: 4px 8px;
    border: 1px solid var(--brand-primary);
    border-radius: var(--radius-sm);
    background: var(--color-bg);
    color: var(--color-text-primary);
    font-size: var(--font-size-sm);
    outline: none;
}

.chat-flow-selector {
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.chat-flow-label {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
}

.chat-flow-select {
    width: 100%;
    padding: 8px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    background: var(--color-bg);
    color: var(--color-text-primary);
    font-size: var(--font-size-sm);
}

/* ========================================
   主内容区
   ======================================== */
.chat-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
}

/* 移动端头部 */
.chat-mobile-header {
    display: none; /* 默认桌面端隐藏 */
    align-items: center;
    padding: 0 var(--spacing-md);
    height: 50px;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-bg-elevated);
}

.menu-btn {
    background: none;
    border: none;
    font-size: 20px;
    color: var(--color-text-primary);
    cursor: pointer;
    margin-right: var(--spacing-md);
}

.chat-mobile-header .title {
    font-weight: var(--font-weight-semibold);
}

/* 对话区域 */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.chat-welcome {
    text-align: center;
    margin-top: 10vh;
    max-width: 600px;
    align-self: center;
}

.chat-welcome-icon {
    font-size: 48px;
    margin-bottom: var(--spacing-md);
}

.chat-welcome h2 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
}

.chat-welcome p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
}

.chat-suggestions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-md);
}

.chat-suggestion {
    padding: 8px 16px;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.chat-suggestion:hover {
    border-color: var(--brand-primary);
    color: var(--brand-primary);
}

/* 消息气泡 */
.message {
    display: flex;
    gap: var(--spacing-md);
    max-width: 800px;
    width: 100%;
    align-self: center;
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    animation: messageSlideIn 0.3s ease-out;
}

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

.message-user {
    background: var(--color-bg-elevated);
    flex-direction: row-reverse;
    flex-wrap: wrap;
}

.message-ai {
    background: transparent;
    flex-wrap: wrap;
}

.message-user .message-content,
.message-ai .message-content {
    width: calc(100% - 56px); /* 40px avatar + 16px gap */
}

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
}

.message-ai .message-avatar {
    background: linear-gradient(135deg, var(--brand-primary) 0%, #22c55e 100%);
    color: white;
    box-shadow: 0 2px 8px rgba(163, 230, 53, 0.3);
}

.message-user .message-avatar {
    background: var(--color-bg-hover);
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
}

.message-content {
    flex: 1;
    line-height: 1.7;
    padding-top: 8px;
    color: var(--color-text-primary);
    word-wrap: break-word;
    overflow-wrap: break-word;
}

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

.message-content p {
    margin-bottom: var(--spacing-sm);
}

.message-content p:last-child {
    margin-bottom: 0;
}

/* AI 消息加载动画 */
.message-loading {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

.message-loading::after {
    content: '';
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid var(--color-border);
    border-top-color: var(--brand-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* 消息操作按钮 */
.message-actions {
    display: flex;
    gap: var(--spacing-xs);
    opacity: 0;
    transition: opacity var(--transition-fast);
    padding-top: var(--spacing-xs);
    width: 100%;
    margin-left: 56px; /* 与内容对齐：40px avatar + 16px gap */
}

.message:hover .message-actions {
    opacity: 1;
}

.message-user .message-actions {
    justify-content: flex-end;
    margin-left: 0;
    margin-right: 56px;
}

.message-action-btn {
    padding: 4px 10px;
    font-size: var(--font-size-xs);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.message-action-btn:hover {
    background: var(--color-bg-hover);
    border-color: var(--brand-primary);
    color: var(--brand-primary);
}

/* 工具调用提示 */
.message-action-tip {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    background: var(--color-bg-elevated);
    padding: 4px 12px;
    border-radius: var(--radius-full);
    margin-top: var(--spacing-sm);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.message-action-tip.success {
    color: var(--color-success);
    background: rgba(34, 197, 94, 0.1);
}

.message-action-tip.error {
    color: var(--color-error);
    background: rgba(239, 68, 68, 0.1);
}

/* 建议提问 */
.follow-up-suggestions {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid #e5e7eb;
    width: 100%;
    display: block;
}

.follow-up-title {
    font-size: 14px;
    color: #6b7280;
    margin-bottom: 8px;
    font-weight: 500;
}

.follow-up-buttons {
    display: flex;
    flex-direction: column;
    gap: 8px;
    width: 100%;
}

.follow-up-btn {
    padding: 8px 12px;
    background: #f9fafb;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    font-size: 14px;
    color: #111827;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: left;
    line-height: 1.5;
    width: 100%;
    display: block;
}

.follow-up-btn:hover {
    background: #f3f4f6;
    border-color: #a3e635;
    color: #111827; /* 保持文字颜色不变，确保可读性 */
    transform: translateX(4px);
}

.follow-up-btn:active {
    transform: translateX(2px);
}

/* 输入区域 */
.chat-input-area {
    padding: var(--spacing-lg);
    background: var(--color-bg);
    border-top: 1px solid var(--color-border);
}

.chat-input-container {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-end;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    padding: var(--spacing-sm);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.chat-input-container:focus-within {
    border-color: var(--brand-primary);
    box-shadow: 0 0 0 2px rgba(163, 230, 53, 0.1);
}

.chat-input-wrapper {
    flex: 1;
}

#messageInput {
    width: 100%;
    border: none;
    background: transparent;
    resize: none;
    max-height: 120px;
    padding: 8px;
    font-size: var(--font-size-base);
    color: var(--color-text-primary);
}

#messageInput:focus {
    outline: none;
}

.chat-send-btn {
    padding: 8px 16px;
    background: var(--brand-primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: var(--font-size-sm);
    transition: opacity var(--transition-fast);
}

.chat-send-btn:hover {
    opacity: 0.9;
}

.chat-send-btn:disabled {
    background: var(--color-border);
    cursor: not-allowed;
}

/* 发送按钮加载旋转动画 */
.spin-icon {
    animation: spin 1s linear infinite;
}

/* ========================================
   响应式适配
   ======================================== */
@media (max-width: 768px) {
    .chat-sidebar {
        position: absolute;
        left: 0;
        top: 0;
        bottom: 0;
        transform: translateX(-100%);
        box-shadow: var(--shadow-xl);
    }

    .chat-sidebar.open {
        transform: translateX(0);
    }

    .chat-sidebar-close {
        display: block;
    }

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

    .chat-messages {
        padding: var(--spacing-md);
    }

    .message {
        gap: var(--spacing-sm);
    }

    .message-avatar {
        width: 28px;
        height: 28px;
        font-size: 14px;
    }
}

/* ========================================
   Markdown 内容样式
   ======================================== */
.markdown-body {
    line-height: 1.7;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.markdown-body p {
    margin-bottom: var(--spacing-sm);
}

.markdown-body p:last-child {
    margin-bottom: 0;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4,
.markdown-body h5,
.markdown-body h6 {
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    font-weight: var(--font-weight-semibold);
    line-height: 1.4;
}

.markdown-body h1 { font-size: 1.5em; }
.markdown-body h2 { font-size: 1.3em; }
.markdown-body h3 { font-size: 1.15em; }
.markdown-body h4 { font-size: 1.05em; }

.markdown-body ul,
.markdown-body ol {
    margin: var(--spacing-sm) 0;
    padding-left: 24px;
    list-style-position: outside;
}

.markdown-body ul {
    list-style-type: disc;
}

.markdown-body ol {
    list-style-type: decimal;
}

.markdown-body li {
    margin-bottom: 4px;
    padding-left: 4px;
}

.markdown-body li > ul,
.markdown-body li > ol {
    margin: 4px 0;
}

.markdown-body ul ul,
.markdown-body ol ol,
.markdown-body ul ol,
.markdown-body ol ul {
    margin-top: 4px;
    margin-bottom: 4px;
}

/* 代码块 */
.markdown-body code {
    background: var(--color-bg-hover);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.9em;
    color: var(--color-text-primary);
}

.markdown-body pre {
    background: var(--color-bg-hover);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin: var(--spacing-sm) 0;
}

.markdown-body pre code {
    background: transparent;
    padding: 0;
    font-size: 0.85em;
    line-height: 1.5;
}

/* 引用块 */
.markdown-body blockquote {
    margin: var(--spacing-sm) 0;
    padding: var(--spacing-sm) var(--spacing-md);
    border-left: 3px solid var(--brand-primary);
    background: var(--color-bg-hover);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--color-text-secondary);
}

.markdown-body blockquote p:last-child {
    margin-bottom: 0;
}

/* 表格 */
.markdown-body table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--spacing-sm) 0;
    font-size: 0.9em;
}

.markdown-body th,
.markdown-body td {
    padding: 8px 12px;
    border: 1px solid var(--color-border);
    text-align: left;
}

.markdown-body th {
    background: var(--color-bg-hover);
    font-weight: var(--font-weight-medium);
}

.markdown-body tr:nth-child(even) {
    background: var(--color-bg-elevated);
}

/* 链接 */
.markdown-body a {
    color: var(--brand-primary);
    text-decoration: none;
}

.markdown-body a:hover {
    text-decoration: underline;
}

/* 分割线 */
.markdown-body hr {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: var(--spacing-md) 0;
}

/* 图片 */
.markdown-body img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    margin: var(--spacing-sm) 0;
}

/* 强调 */
.markdown-body strong {
    font-weight: var(--font-weight-semibold);
}

.markdown-body em {
    font-style: italic;
}

/* 删除线 */
.markdown-body del {
    text-decoration: line-through;
    color: var(--color-text-muted);
}

/* 任务列表 */
.markdown-body input[type="checkbox"] {
    margin-right: 6px;
    vertical-align: middle;
}