/* Left Side Category Navigation Styles */
.left-category-nav {
    position: fixed;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1000;
    pointer-events: none;
}

.category-nav-container {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 12px 0;
    background: var(--card-bg);
    border-radius: 0 12px 12px 0;
    box-shadow: var(--box-shadow);
    border: 1px solid var(--border-color);
    border-left: none;
    pointer-events: auto;
    transition: var(--transition);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.category-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 10px 12px;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    min-width: 60px;
    border-radius: 8px;
    margin: 0 6px;
    animation: categoryItemSlideIn 0.3s ease-out forwards;
}

.category-nav-item:hover {
    background-color: var(--hover-color);
    transform: translateX(4px);
}

.category-nav-item:active {
    transform: translateX(4px) scale(0.95);
    background-color: rgba(var(--primary-color-rgb), 0.15);
}

.category-nav-item.active {
    background-color: rgba(var(--primary-color-rgb), 0.1);
    border-left: 3px solid var(--primary-color);
}

.category-nav-icon {
    width: 24px;
    height: 24px;
    margin-bottom: 4px;
    color: var(--text-color);
    transition: var(--transition);
}

.category-nav-item:hover .category-nav-icon {
    color: var(--primary-color);
    transform: scale(1.1);
}

.category-nav-title {
    font-size: 10px;
    font-weight: 500;
    color: var(--text-secondary);
    text-align: center;
    line-height: 1.2;
    transition: var(--transition);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 48px;
}

.category-nav-item:hover .category-nav-title {
    color: var(--primary-color);
    font-weight: 600;
}

/* Category Feature Item Favorite Button */
.category-favorite-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    background: none;
    border: none;
    padding: 4px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    z-index: 10;
    opacity: 0;
    transform: scale(0.8);
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.category-feature-item:hover .category-favorite-btn {
    opacity: 1;
    transform: scale(1);
}

.category-favorite-btn .material-icons {
    font-size: 16px;
    color: var(--text-secondary);
    transition: var(--transition);
}

.category-favorite-btn:hover {
    background-color: rgba(var(--primary-color-rgb), 0.1);
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(var(--primary-color-rgb), 0.15);
    border-color: rgba(var(--primary-color-rgb), 0.2);
}

.category-favorite-btn:hover .material-icons {
    color: var(--primary-color);
}

.category-favorite-btn.favorited {
    opacity: 1;
    background-color: rgba(var(--primary-color-rgb), 0.1);
    border-color: rgba(var(--primary-color-rgb), 0.2);
    box-shadow: 0 2px 8px rgba(var(--primary-color-rgb), 0.15);
}

.category-favorite-btn.favorited:hover {
    background-color: rgba(var(--primary-color-rgb), 0.15);
    transform: scale(1.15);
    box-shadow: 0 6px 16px rgba(var(--primary-color-rgb), 0.2);
}

.category-favorite-btn.favorited .material-icons {
    color: var(--primary-color);
    animation: favoriteHeartBeat 0.6s ease-out;
}

@keyframes favoriteHeartBeat {
    0% { transform: scale(1); }
    25% { transform: scale(1.3); }
    50% { transform: scale(1.1); }
    75% { transform: scale(1.25); }
    100% { transform: scale(1); }
}



/* Expanded Drawer Overlay */
.category-drawer-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
    pointer-events: none;
}

.category-drawer-overlay.show {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

/* Expanded Drawer Content */
.category-drawer-content {
    position: fixed;
    top: 0;
    left: 0;
    width: 400px;
    height: 100vh;
    height: 100dvh; /* 使用动态视口高度 */
    max-height: 100vh;
    max-height: 100dvh;
    background: var(--card-bg);
    box-shadow: var(--box-shadow-lg);
    transform: translateX(-100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1001;
    display: flex;
    flex-direction: column;
    pointer-events: auto;
    overflow: hidden;
    /* 确保 flexbox 容器正确工作 */
    contain: layout style;
}

.category-drawer-content.show {
    transform: translateX(0);
}

.category-drawer-content .drawer-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.category-drawer-content .drawer-header h3 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-color);
}

.category-drawer-content .drawer-close-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.category-drawer-content .drawer-close-btn:hover {
    background-color: var(--hover-color);
    color: var(--text-color);
}

.category-drawer-content .drawer-body {
    flex: 1 1 0%; /* 更明确的 flex 设置 */
    overflow-y: auto;
    overflow-x: hidden;
    padding: 20px 24px 0 24px; /* 移除底部内边距，避免与 category-features 的 padding-bottom 冲突 */
    min-height: 0;
    max-height: 100%;
    /* 确保滚动区域可以正确计算 */
    position: relative;
    -webkit-overflow-scrolling: touch;
    /* 强制创建新的层叠上下文 */
    will-change: scroll-position;
}

.category-features {
    display: flex;
    flex-direction: column;
    gap: 12px;
    /* 确保内容可以完全显示 */
    padding-bottom: 60px;
    /* 确保最后一个元素有足够的空间 */
    min-height: min-content;
    /* 确保容器有足够的高度 */
    box-sizing: border-box;
}

.category-feature-item {
    position: relative;
    padding: 16px;
    border-radius: var(--border-radius-sm);
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    cursor: pointer;
    display: flex;
    align-items: flex-start;
    gap: 12px;
    transition: all 0.2s ease;
}

.category-feature-item:hover {
    background-color: var(--hover-color);
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--box-shadow-sm);
}

.category-feature-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: white;
    font-size: 18px;
}

.category-feature-info {
    flex: 1;
}

.category-feature-title {
    font-weight: 500;
    color: var(--text-color);
    margin-bottom: 4px;
    font-size: 14px;
}

.category-feature-description {
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* Hover trigger area - removed ::after to avoid conflict with tooltip arrow */

/* Hide original drawer and buttons when category nav is active */
.category-nav-active .feature-drawer,
.category-nav-active #open-drawer-btn {
    display: none !important;
}

/* Responsive Design */

/* Extra large screens (1440px+) - Level 3 width */
@media (min-width: 1440px) {
    .category-nav-item {
        padding: 12px 15px;
        min-width: 72px;
        margin: 0 7px;
    }
    
    .category-nav-icon {
        width: 26px;
        height: 26px;
        margin-bottom: 5px;
    }
    
    .category-nav-title {
        font-size: 11px;
        max-width: 58px;
        font-weight: 600;
    }
    
    .category-nav-container {
        padding: 14px 0;
        gap: 10px;
    }
    
    .category-drawer-content {
        width: 430px;
        max-height: 100vh;
        max-height: 100dvh;
        height: 100dvh;
    }
}

/* Large screens (1200px - 1439px) - Level 2 width (enhanced) */
@media (min-width: 1200px) and (max-width: 1439px) {
    .category-nav-item {
        padding: 12px 16px;
        min-width: 70px;
        margin: 0 7px;
    }
    
    .category-nav-icon {
        width: 26px;
        height: 26px;
        margin-bottom: 5px;
    }
    
    .category-nav-title {
        font-size: 11px;
        max-width: 56px;
    }
    
    .category-nav-container {
        padding: 14px 0;
        gap: 10px;
    }
    
    .category-drawer-content {
        width: 420px;
        max-height: 100vh;
        max-height: 100dvh;
        height: 100dvh;
    }
}

/* Medium screens (1025px - 1199px) - Level 1 width (current default) */
@media (min-width: 1025px) and (max-width: 1199px) {
    .category-nav-item {
        padding: 10px 12px;
        min-width: 60px;
        margin: 0 6px;
    }
    
    .category-nav-icon {
        width: 24px;
        height: 24px;
        margin-bottom: 4px;
    }
    
    .category-nav-title {
        font-size: 10px;
        max-width: 48px;
    }
    
    .category-nav-container {
        padding: 12px 0;
        gap: 8px;
    }
    
    .category-drawer-content {
        width: 400px;
        max-height: 100vh;
        max-height: 100dvh;
        height: 100dvh;
    }
}

/* Tablet screens (769px - 1024px) - Compact width */
@media (min-width: 769px) and (max-width: 1024px) {
    .category-drawer-content {
        width: 350px;
        max-height: 100vh;
        max-height: 100dvh;
        height: 100dvh;
    }
    
    .category-nav-container {
        padding: 8px 0;
    }
    
    .category-nav-item {
        padding: 8px 10px;
        min-width: 50px;
    }
    
    .category-nav-icon {
        width: 18px;
        height: 18px;
    }
    
    .category-nav-title {
        font-size: 9px;
        max-width: 40px;
    }
    
    .category-drawer-content .drawer-body {
        padding: 15px 20px 0 20px; /* 移除底部内边距 */
    }
}

/* Mobile screens (768px and below) - Hidden */
@media (max-width: 768px) {
    .left-category-nav {
        display: none;
    }
}

/* Prevent content overlap with left navigation */
@media (min-width: 769px) {
    .hero .container,
    .stats .container,
    .features .container,
    .about .container,
    .cta .container {
        margin-left: 80px;
        transition: margin-left 0.3s ease;
    }
}

@media (min-width: 1025px) {
    .hero .container,
    .stats .container,
    .features .container,
    .about .container,
    .cta .container {
        margin-left: 90px;
    }
}

@media (min-width: 1200px) {
    .hero .container,
    .stats .container,
    .features .container,
    .about .container,
    .cta .container {
        margin-left: 100px;
    }
}

@media (min-width: 1440px) {
    .hero .container,
    .stats .container,
    .features .container,
    .about .container,
    .cta .container {
        margin-left: 110px;
    }
}

/* Dark theme adjustments */
[data-theme="dark"] .category-nav-container {
    background: var(--card-bg);
    border-color: var(--border-color);
}

[data-theme="dark"] .category-drawer-content {
    background: var(--card-bg);
}

[data-theme="dark"] .category-feature-item {
    background-color: var(--light-bg);
    border-color: var(--border-color);
}

[data-theme="dark"] .category-feature-item:hover {
    background-color: var(--hover-color);
}

/* Dark theme adjustments for favorite buttons */
[data-theme="dark"] .category-favorite-btn {
    background-color: rgba(31, 41, 55, 0.9);
    color: var(--text-secondary);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-color: rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .category-favorite-btn:hover {
    background-color: rgba(var(--primary-color-rgb), 0.2);
    color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(var(--primary-color-rgb), 0.2);
    border-color: rgba(var(--primary-color-rgb), 0.3);
}

[data-theme="dark"] .category-favorite-btn.favorited {
    background-color: rgba(var(--primary-color-rgb), 0.15);
    color: var(--primary-color);
    box-shadow: 0 2px 8px rgba(var(--primary-color-rgb), 0.25);
    border-color: rgba(var(--primary-color-rgb), 0.3);
}

[data-theme="dark"] .category-favorite-btn.favorited:hover {
    background-color: rgba(var(--primary-color-rgb), 0.25);
    transform: scale(1.15);
    box-shadow: 0 6px 16px rgba(var(--primary-color-rgb), 0.3);
    border-color: rgba(var(--primary-color-rgb), 0.4);
}

[data-theme="dark"] .category-favorite-btn .material-icons {
    color: inherit;
}

/* Auto theme support (follows system preference) */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .category-favorite-btn {
        background-color: rgba(31, 41, 55, 0.9);
        color: var(--text-secondary);
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
        border-color: rgba(255, 255, 255, 0.1);
    }

    :root:not([data-theme="light"]) .category-favorite-btn:hover {
        background-color: rgba(var(--primary-color-rgb), 0.2);
        color: var(--primary-color);
        box-shadow: 0 4px 12px rgba(var(--primary-color-rgb), 0.2);
        border-color: rgba(var(--primary-color-rgb), 0.3);
    }

    :root:not([data-theme="light"]) .category-favorite-btn.favorited {
        background-color: rgba(var(--primary-color-rgb), 0.15);
        color: var(--primary-color);
        box-shadow: 0 2px 8px rgba(var(--primary-color-rgb), 0.25);
        border-color: rgba(var(--primary-color-rgb), 0.3);
    }

    :root:not([data-theme="light"]) .category-favorite-btn.favorited:hover {
        background-color: rgba(var(--primary-color-rgb), 0.25);
        box-shadow: 0 6px 16px rgba(var(--primary-color-rgb), 0.3);
        border-color: rgba(var(--primary-color-rgb), 0.4);
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .category-favorite-btn {
        border-width: 2px;
        border-style: solid;
        border-color: var(--text-color);
        background-color: var(--card-bg);
    }

    .category-favorite-btn:hover {
        border-color: var(--primary-color);
        background-color: var(--primary-color);
    }

    .category-favorite-btn:hover .material-icons {
        color: white;
    }

    .category-favorite-btn.favorited {
        border-color: var(--primary-color);
        background-color: var(--primary-color);
    }

    .category-favorite-btn.favorited .material-icons {
        color: white;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .category-favorite-btn {
        transition: none;
    }

    .category-favorite-btn.favorited .material-icons {
        animation: none;
    }

    @keyframes favoriteHeartBeat {
        0%, 100% { transform: scale(1); }
    }
}

/* Tooltip styles for category items */

.category-nav-item[data-tooltip]::before {
    content: attr(data-tooltip);
    position: absolute;
    left: 100%;
    top: 50%;
    transform: translateY(-50%);
    background: var(--card-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 12px;
    font-weight: 500;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    margin-left: 10px;
    z-index: 1002;
    pointer-events: none;
    box-shadow: var(--box-shadow-sm);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.category-nav-item[data-tooltip]::after {
    content: '';
    position: absolute;
    left: 100%;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border: 6px solid transparent;
    border-right-color: var(--card-bg);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    margin-left: 4px;
    z-index: 1001;
    pointer-events: none;
    filter: drop-shadow(-1px 0 1px var(--border-color));
}

.category-nav-item[data-tooltip]:hover::before,
.category-nav-item[data-tooltip]:hover::after {
    opacity: 1;
    visibility: visible;
}

.category-nav-item[data-tooltip]:hover::before {
    transform: translateY(-50%) translateX(2px);
}

.category-nav-item[data-tooltip]:hover::after {
    transform: translateY(-50%) translateX(2px);
}

/* Enhanced tooltip features */

/* Tooltip color variants based on category colors */
.category-nav-item[data-tooltip]::before {
    border-left: 3px solid var(--category-color, var(--primary-color));
}

/* Tooltip responsive adjustments */

/* Extra large screens - Enhanced tooltips */
@media (min-width: 1440px) {
    .category-nav-item[data-tooltip]::before {
        font-size: 12px;
        padding: 9px 14px;
        margin-left: 12px;
        border-radius: 9px;
    }
    
    .category-nav-item[data-tooltip]::after {
        border-width: 6px;
        margin-left: 5px;
    }
}

/* Large screens - Standard tooltips */
@media (min-width: 1200px) and (max-width: 1439px) {
    .category-nav-item[data-tooltip]::before {
        font-size: 12px;
        padding: 9px 14px;
        margin-left: 12px;
        border-radius: 9px;
    }
    
    .category-nav-item[data-tooltip]::after {
        border-width: 6px;
        margin-left: 5px;
    }
}

/* Medium screens - Compact tooltips */
@media (min-width: 769px) and (max-width: 1199px) {
    .category-nav-item[data-tooltip]::before {
        font-size: 11px;
        padding: 6px 10px;
        margin-left: 8px;
    }
    
    .category-nav-item[data-tooltip]::after {
        border-width: 5px;
        margin-left: 3px;
    }
}

/* Mobile screens - Hide tooltips */
@media (max-width: 768px) {
    .category-nav-item[data-tooltip]::before,
    .category-nav-item[data-tooltip]::after {
        display: none; /* Hide tooltips on mobile to avoid interference */
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .category-nav-item[data-tooltip]::before {
        border: 2px solid var(--text-color);
        background: var(--bg-color);
        color: var(--text-color);
        font-weight: 600;
    }
    
    .category-nav-item[data-tooltip]::after {
        border-right-color: var(--bg-color);
        filter: drop-shadow(-2px 0 2px var(--text-color));
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .category-nav-item[data-tooltip]::before,
    .category-nav-item[data-tooltip]::after {
        transition: opacity 0.1s ease;
    }
    
    .category-nav-item[data-tooltip]:hover::before,
    .category-nav-item[data-tooltip]:hover::after {
        transform: translateY(-50%);
    }
}

/* Animation for category items */
@keyframes categoryItemSlideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}



.category-nav-item:nth-child(1) { animation-delay: 0.1s; }
.category-nav-item:nth-child(2) { animation-delay: 0.2s; }
.category-nav-item:nth-child(3) { animation-delay: 0.3s; }
.category-nav-item:nth-child(4) { animation-delay: 0.4s; }
.category-nav-item:nth-child(5) { animation-delay: 0.5s; }
.category-nav-item:nth-child(6) { animation-delay: 0.6s; }

/* Smooth scrollbar for drawer */
.category-drawer-content .drawer-body::-webkit-scrollbar {
    width: 6px;
}

.category-drawer-content .drawer-body::-webkit-scrollbar-track {
    background: var(--hover-color);
    border-radius: 3px;
}

.category-drawer-content .drawer-body::-webkit-scrollbar-thumb {
    background: var(--text-muted-color);
    border-radius: 3px;
}

.category-drawer-content .drawer-body::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* 确保滚动行为在所有浏览器中都能正常工作 */
.category-drawer-content .drawer-body {
    scroll-behavior: smooth;
    overscroll-behavior: contain;
}

/* 修复 iOS Safari 滚动问题 */
@supports (-webkit-touch-callout: none) {
    .category-drawer-content .drawer-body {
        -webkit-overflow-scrolling: touch;
        transform: translateZ(0);
    }
}

/* 确保功能项目有足够的点击区域 */
.category-feature-item {
    scroll-margin-top: 10px;
    scroll-margin-bottom: 10px;
}

/* 确保最后一个功能项完全可见 */
.category-feature-item:last-child {
    margin-bottom: 20px;
    scroll-margin-bottom: 30px;
}

/* 添加一个虚拟的底部空间确保滚动到底 */
.category-features::after {
    content: '';
    display: block;
    height: 20px;
    flex-shrink: 0;
}