/* 全局样式 */
:root {
    /* 主要交互色 */
    --primary-color: #3A7DFF;
    --primary-hover-color: #2563EB;
    
    /* 文本颜色 */
    --primary-text-color: #1A202C;
    --secondary-text-color: #4A5568;
    
    /* 背景颜色 */
    --page-background-color: #FFFFFF;
    --light-background-color: #F7FAFC;
    
    /* 边框颜色 */
    --border-color: #E2E8F0;
    
    /* 状态颜色 */
    --success-color: #10B981;
    --error-color: #EF4444;
    --warning-color: #F59E0B;
    --info-color: #3B82F6;
    
    /* 暗色模式使用 */
    --dark-bg-color: #1F2937;
    --dark-secondary-bg-color: #374151;
    --dark-text-color: #F3F4F6;
    --dark-border-color: #4B5563;
}

* {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: var(--primary-text-color);
    margin: 0;
    padding: 0;
    background-color: var(--page-background-color);
}

.dark-mode {
    --primary-text-color: var(--dark-text-color);
    --secondary-text-color: #9CA3AF;
    --page-background-color: var(--dark-bg-color);
    --light-background-color: var(--dark-secondary-bg-color);
    --border-color: var(--dark-border-color);
    background-color: var(--dark-bg-color);
    color: var(--dark-text-color);
}

/* 导航栏样式 */
.navbar {
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    padding: 0.5rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.dark-mode .navbar {
    background-color: #111827;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.navbar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    gap: 1.5rem;
}

.nav-links a {
    color: var(--text-color);
    text-decoration: none;
    padding: 0.5rem;
    border-radius: 0.25rem;
    transition: background-color 0.2s;
}

.nav-links a:hover {
    background-color: var(--bg-color);
}

.nav-links a.active {
    color: var(--primary-color);
    font-weight: 600;
}

/* 移动端导航组件样式 */
.hamburger-menu {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    color: var(--primary-color);
}

.hamburger-menu .material-icons {
    font-size: 24px;
}

/* 侧边栏导航样式 */
.sidebar {
    position: fixed;
    top: 0;
    left: -280px;
    width: 280px;
    height: 100%;
    background-color: var(--page-background-color);
    box-shadow: 2px 0 5px rgba(0, 0, 0, 0.1);
    z-index: 2000;
    transition: left 0.3s ease;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.sidebar.active {
    left: 0;
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 20px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-header .logo {
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
}

.close-sidebar {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--primary-color);
}

.sidebar-nav {
    padding: 20px 0;
    flex: 1;
}

.sidebar-nav-link {
    display: flex;
    align-items: center;
    padding: 15px 20px;
    color: var(--primary-text-color);
    text-decoration: none;
    transition: background-color 0.3s;
}

.sidebar-nav-link:hover {
    background-color: var(--light-background-color);
}

.sidebar-nav-link.active {
    background-color: rgba(58, 125, 255, 0.1);
    color: var(--primary-color);
    font-weight: 500;
}

.sidebar-nav-link .material-icons {
    margin-right: 15px;
    color: var(--primary-color);
}

.sidebar-footer {
    padding: 20px;
    border-top: 1px solid var(--border-color);
    font-size: 12px;
    color: var(--secondary-text-color);
    text-align: center;
}

/* 遮罩层 */
.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1999;
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.sidebar-overlay.active {
    display: block;
    opacity: 1;
}

/* 暗色模式适配 */
.dark-mode .sidebar {
    background-color: var(--dark-bg-color);
    box-shadow: 2px 0 5px rgba(0, 0, 0, 0.3);
}

.dark-mode .sidebar-header {
    border-bottom-color: var(--dark-border-color);
}

.dark-mode .sidebar-footer {
    border-top-color: var(--dark-border-color);
}

.dark-mode .sidebar-nav-link {
    color: var(--dark-text-color);
}

.dark-mode .sidebar-nav-link:hover {
    background-color: var(--dark-secondary-bg-color);
}

.dark-mode .sidebar-nav-link.active {
    background-color: rgba(59, 130, 246, 0.2);
}

/* 表单样式 */
.form-container {
    max-width: 800px;
    margin: 2rem auto;
    padding: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    font-size: 1rem;
    transition: border-color 0.2s;
}

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

.form-text {
    font-size: 0.875rem;
    color: #6b7280;
    margin-top: 0.25rem;
    display: block;
}

.submit-button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 0.375rem;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.2s;
}

.submit-button:hover {
    background-color: #4f46e5;
    transform: translateY(-1px);
}

/* 编辑器样式 */
.editor-container {
    margin-bottom: 1.5rem;
}

.editor-mode-switch {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 0.5rem;
}

.editor-mode-btn {
    padding: 0.5rem 1rem;
    border: none;
    background: none;
    font-size: 0.875rem;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
}

.editor-mode-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    font-weight: 600;
}

/* 历史记录样式 */
.history-list {
    margin-top: 1.5rem;
}

.history-item {
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    margin-bottom: 1rem;
}

.history-item h3 {
    margin-top: 0;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.dark-mode .history-item {
    background-color: #1f2937;
    border-color: #374151;
}

/* 设置页面样式 */
.settings-section {
    margin-bottom: 2rem;
}

.settings-section h3 {
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

/* 加载指示器 */
.loading {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.dark-mode .loading {
    background-color: rgba(0, 0, 0, 0.8);
}

.loading::after {
    content: "";
    width: 50px;
    height: 50px;
    border: 5px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* 主题切换按钮 */
.theme-switch {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: transform 0.3s;
}

.theme-switch:hover {
    transform: scale(1.1);
}

/* 响应式调整 */
@media (max-width: 768px) {
    .form-container,
    .intro-container {
        padding: 20px;
    }
    
    .feature-container,
    .intro-content {
        grid-template-columns: 1fr;
    }
    
    .feature-item,
    .intro-item {
        max-width: 100%;
        margin-bottom: 20px;
    }
    
    .hero {
        padding: 40px 20px;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .features, .steps {
        padding: 40px 20px;
        gap: 20px;
    }
    
    .feature-card {
        padding: 20px;
    }
    
    .stats-container {
        flex-direction: column;
        align-items: center;
    }
    
    .stat-card {
        width: 100%;
        max-width: 100%;
    }
    
    .history-header {
        padding: 20px;
    }
    
    /* 移动导航显示 */
    .hamburger-menu {
        display: block;
    }
    
    .nav-links {
        display: none;
    }
}

@media (max-width: 480px) {
    .nav-link {
        padding: 0 10px;
        font-size: 13px;
    }
    
    .hero h1 {
        font-size: 1.8rem;
    }
    
    .history-item {
        padding: 15px;
    }
    
    .timestamp {
        position: static;
        display: block;
        margin-bottom: 10px;
    }
    
    /* 小屏幕侧边栏调整 */
    .sidebar {
        width: 250px;
    }
    
    .sidebar-header {
        padding: 15px;
    }
    
    .sidebar-nav-link {
        padding: 12px 15px;
    }
    
    .sidebar-footer {
        padding: 15px;
        font-size: 11px;
    }
}

/* 首页特定样式 */
.hero {
    text-align: center;
    padding: 3rem 1rem;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    color: var(--text-color);
    opacity: 0.9;
}

.cta-button {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    padding: 0.75rem 1.5rem;
    border-radius: 0.375rem;
    font-weight: 500;
    transition: background-color 0.2s, transform 0.2s;
}

.cta-button:hover {
    background-color: #4f46e5;
    transform: translateY(-2px);
}

/* 功能展示区域 */
.feature-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2rem;
    margin-top: 3rem;
}

.feature-item {
    flex: 1;
    min-width: 250px;
    max-width: 350px;
    text-align: center;
    padding: 1.5rem;
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-item h3 {
    margin-bottom: 0.75rem;
    color: var(--primary-color);
}

/* 系统介绍区域 */
.system-intro {
    margin-top: 4rem;
    padding: 3rem 1rem;
    background-color: var(--bg-color);
}

.intro-container {
    max-width: 1200px;
    margin: 0 auto;
}

.intro-container h2 {
    text-align: center;
    margin-bottom: 2rem;
}

.intro-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.intro-item {
    padding: 1.5rem;
    border-radius: 0.5rem;
    background-color: white;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.dark-mode .intro-item {
    background-color: #1f2937;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.intro-item h3 {
    margin-top: 0;
    margin-bottom: 0.75rem;
    color: var(--primary-color);
}

/* 深色模式适配 */
.dark-mode .features {
    background-color: var(--background-color);
}

.dark-mode .feature-item {
    background-color: #374151;
}

.dark-mode .intro-item {
    background-color: #374151;
    color: #F9FAFB;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .feature-container,
    .intro-content {
        grid-template-columns: 1fr;
    }

    .feature-item,
    .intro-item {
        padding: 1.5rem;
    }
}

/* 添加新的样式 */
.form-text {
    display: block;
    margin-top: 0.25rem;
    font-size: 0.875rem;
    color: #6B7280;
}

.dark-mode .form-text {
    color: #9CA3AF;
}

.form-group input[type="number"] {
    width: 150px;
}

.settings-section {
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid #E5E7EB;
}

.dark-mode .settings-section {
    border-bottom-color: #4B5563;
}

.settings-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

/* 编辑器相关样式 */
.editor-container {
    border: 1px solid #E5E7EB;
    border-radius: 5px;
    overflow: hidden;
    min-height: 400px;
}

.editor-mode-switch {
    display: flex;
    border-bottom: 1px solid #E5E7EB;
    background-color: #F3F4F6;
}

.editor-mode-btn {
    padding: 8px 15px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
}

.editor-mode-btn.active {
    background-color: white;
    font-weight: bold;
    border-bottom: 2px solid var(--primary-color);
}

/* 增加富文本编辑器高度 */
.ql-container {
    min-height: 350px;
    font-size: 16px; /* 增加字体大小 */
}

/* 改善编辑器内容区域的可视性 */
.ql-editor {
    min-height: 350px;
    line-height: 1.6;
    padding: 15px;
}

/* 确保编辑器工具栏有足够的空间 */
.ql-toolbar {
    padding: 10px;
    border-bottom: 1px solid #E5E7EB;
}

.dark-mode .editor-container {
    border-color: #4B5563;
}

.dark-mode .editor-mode-switch {
    background-color: #374151;
    border-color: #4B5563;
}

.dark-mode .editor-mode-btn.active {
    background-color: #1F2937;
}

.dark-mode .ql-toolbar {
    background-color: #374151;
    border-color: #4B5563;
}

.dark-mode .ql-container {
    background-color: #1F2937;
    color: #F9FAFB;
    border-color: #4B5563;
}

.dark-mode .ql-editor {
    color: #F9FAFB;
}

.dark-mode .ql-picker-label, 
.dark-mode .ql-picker-options, 
.dark-mode .ql-stroke {
    color: #F9FAFB !important;
    stroke: #F9FAFB !important;
}

/* 增强工具栏按钮提示效果 */
.ql-toolbar button[title]:hover::after {
    content: attr(title);
    position: absolute;
    background: rgba(0, 0, 0, 0.75);
    color: white;
    padding: 5px 10px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: normal;
    white-space: nowrap;
    z-index: 1000;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    margin-bottom: 5px;
    pointer-events: none;
}

.dark-mode .ql-toolbar button[title]:hover::after {
    background: rgba(255, 255, 255, 0.9);
    color: #1F2937;
}

.dark-mode #htmlEditor {
    background-color: #1F2937;
    color: #F9FAFB;
    border-color: #4B5563;
}

/* 添加页面切换过渡效果 */
.page-container {
    opacity: 0;
    transition: opacity 0.3s ease;
    display: none; /* 初始不显示 */
    min-height: calc(100vh - 200px); /* 确保容器有足够高度，减去导航栏和边距的高度 */
}

.page-container.active {
    opacity: 1;
    display: block; /* 激活时显示 */
}

/* 首页特殊处理，避免闪烁 */
#home.page-container {
    will-change: opacity; /* 优化动画性能 */
    -webkit-backface-visibility: hidden; /* 防止Safari上的闪烁 */
    backface-visibility: hidden;
}

/* 页面容器共同样式 */
.form-container, #home {
    position: relative; /* 添加定位上下文 */
}

/* 确保容器有足够的最小高度 */
#history {
    min-height: 400px;
}

.history-list {
    margin-top: 1rem;
    min-height: 300px; /* 添加最小高度，防止内容加载时的跳动 */
}

/* 页面共同样式，确保滚动行为一致 */
#home, #send, #history, #settings {
    padding-bottom: 50px; /* 添加底部内边距，确保有滚动空间 */
}

/* 首页可能需要特别处理，因为它的内容较多 */
#home .system-intro {
    margin-bottom: 50px; /* 确保底部有足够空间 */
}

/* 历史记录页面样式 */
.history-header {
    background-color: #5850EC;
    color: white;
    padding: 30px 40px;
    text-align: center;
    margin-bottom: 30px;
    border-radius: 0 0 10px 10px;
}

.history-header h1 {
    margin-bottom: 10px;
    font-size: 2rem;
}

.history-header p {
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
    opacity: 0.9;
}

.stats-container {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 30px;
    margin-bottom: 40px;
}

.stat-card {
    background-color: white;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    min-width: 200px;
    flex: 1 1 200px;
    max-width: 300px;
    text-align: center;
}

.stat-card h3 {
    color: #666;
    font-size: 1rem;
    margin-bottom: 10px;
}

.stat-value {
    font-size: 2rem;
    font-weight: bold;
    color: #5850EC;
}

#historyList {
    max-width: 900px;
    margin: 0 auto;
}

.history-item {
    background-color: white;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    position: relative;
    transition: transform 0.2s, box-shadow 0.2s;
    border-left: 3px solid #5850EC;
}

.history-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.history-item h3 {
    margin-bottom: 10px;
    color: #333;
    font-size: 1.2rem;
}

.history-item p {
    margin-bottom: 8px;
    color: #666;
    font-size: 0.95rem;
}

.timestamp {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 0.8rem;
    color: #999;
}

.account-badge {
    display: inline-block;
    background-color: #e8f4fd;
    color: #5850EC;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.8rem;
    margin-top: 10px;
}

#emptyHistory {
    text-align: center;
    padding: 60px 20px;
    background-color: white;
    border-radius: 8px;
    margin-top: 40px;
    display: none;
}

#emptyHistory h3 {
    margin-bottom: 15px;
    color: #666;
}

#emptyHistory p {
    color: #999;
    margin-bottom: 25px;
}