:root {
    --bg-deep: #0a0a0f;
    --bg-surface: #12121a;
    --bg-card: #1a1a24;
    --bg-card-hover: #22222e;
    --text-primary: #e8e8ed;
    --text-secondary: #8888a0;
    --text-muted: #55556a;
    --border-subtle: #2a2a3a;
    --border-strong: #3a3a4a;
    --accent-purple: #8b658b;
    --accent-purple-light: #a87ba8;
    --accent-purple-dark: #6e4f6e;
    --accent-magenta: #f72585;
    --accent-yellow: #fee440;
    --accent-blue: #4cc9f0;
    --accent-orange: #ff9f1c;
    --accent-red: #ff6b6b;
    --accent-green: #06d6a0;
    --glow-purple: rgb(139 101 139 / 15%);
    --glow-magenta: rgb(247 37 133 / 15%);
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

[data-theme='light'] {
    --bg-deep: #fcf7f9;
    --bg-surface: #f5eef2;
    --bg-card: #f0e8ec;
    --bg-card-hover: #eadfe5;
    --text-primary: #3a2e38;
    --text-secondary: #6b5c68;
    --text-muted: #9a8a95;
    --border-subtle: #e0d5db;
    --border-strong: #cfc2cb;
    --accent-purple: #8b658b;
    --accent-purple-light: #a87ba8;
    --accent-purple-dark: #6e4f6e;
    --glow-purple: rgb(139 101 139 / 8%);
    --glow-magenta: rgb(230 57 117 / 8%);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Space Grotesk', system-ui, sans-serif;
    background: var(--bg-deep);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
    overflow-y: scroll;
}

body.is-loading {
    overflow: hidden;
}

/* Sticky footer 方案 */
.page-wrapper {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    position: relative;
    z-index: 1;
}

.page-wrapper .container {
    flex: 1;
}

.bg-grid {
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(rgb(139 101 139 / 3%) 1px, transparent 1px),
        linear-gradient(90deg, rgb(139 101 139 / 3%) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
    z-index: 0;
}

.bg-gradient {
    position: fixed;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 50% at 20% -10%, var(--glow-purple), transparent),
        radial-gradient(ellipse 60% 40% at 80% 110%, var(--glow-magenta), transparent);
    pointer-events: none;
    z-index: 0;
}

.container {
    width: 100%;
    max-width: 1480px;
    margin: 0 auto;
    padding: 24px 32px 40px;
}

.page-loader {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    background: rgb(10 10 15 / 92%);
    backdrop-filter: blur(8px);
    color: #e8e8ed;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    opacity: 1;
    transition: opacity 0.38s ease;
}

[data-theme='light'] .page-loader {
    background: rgb(252 247 249 / 90%);
    color: #3a2e38;
}

.page-loader-spinner {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    border: 3px solid rgb(255 255 255 / 16%);
    border-top-color: var(--accent-purple);
    animation: loader-spin 0.9s linear infinite;
}

body.is-ready .page-loader {
    opacity: 0;
    pointer-events: none;
}

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

header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    position: relative;
    gap: 16px;
    flex-wrap: wrap;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 20px;
}

.stat-item {
    display: flex;
    align-items: baseline;
    gap: 4px;
}

.stat-number {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--accent-purple);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.stat-divider {
    width: 1px;
    height: 16px;
    background: var(--border-subtle);
}

/* Logo 链接样式 */
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: inherit;
    cursor: pointer;
    transition: opacity 0.2s ease;
}

.logo:hover {
    opacity: 0.8;
}

.logo-img {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    object-fit: contain;
    flex-shrink: 0;
}

header h1 {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
    background-clip: text;
    -webkit-text-fill-color: transparent;
    white-space: nowrap;
}

.tagline {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--text-muted);
    display: none;
}

@media (min-width: 768px) {
    .tagline {
        display: flex;
        align-items: center;
        gap: 8px;
    }
}

.tagline span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.tagline .dot {
    width: 3px;
    height: 3px;
    background: var(--accent-purple);
    border-radius: 50%;
}

.theme-toggle {
    width: 36px;
    height: 36px;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.25s ease;
    color: var(--text-secondary);
    flex-shrink: 0;
}

.theme-toggle:hover {
    border-color: var(--accent-purple);
    color: var(--text-primary);
    box-shadow: 0 0 0 3px rgb(139 101 139 / 12%);
}

.search-wrapper {
    margin: 0 auto 8px;
    position: relative;
}

.search-box {
    position: relative;
}

.search-box::before {
    content: '>';
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    font-family: 'JetBrains Mono', monospace;
    font-size: 1rem;
    color: var(--accent-purple);
    font-weight: 600;
}

.search-box input {
    width: 100%;
    padding: 12px 16px 12px 38px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: 20px;
    color: var(--text-primary);
    outline: none;
    transition: all 0.25s ease;
}

.search-box input::placeholder {
    color: var(--text-muted);
}

.search-box input:focus {
    border-color: var(--accent-purple);
    box-shadow:
        0 0 0 3px rgb(139 101 139 / 12%),
        0 4px 16px rgb(139 101 139 / 10%);
}

.search-results-count {
    text-align: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 10px;
    min-height: 18px;
}

/* 分类区域 */
.categories-wrapper {
    margin-bottom: 32px;
    position: relative;
}

.categories {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}

.category-btn {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    font-weight: 500;
    padding: 8px 14px;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.25s ease;
    position: relative;
    overflow: hidden;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.category-btn .cat-icon {
    font-size: 0.9rem;
    transition: transform 0.25s ease;
}

.category-btn .cat-count {
    font-size: 0.65rem;
    padding: 2px 6px;
    background: var(--bg-card);
    border-radius: 10px;
    color: var(--text-muted);
    transition: all 0.25s ease;
    font-weight: 600;
}

.category-btn:hover {
    border-color: var(--accent-purple);
    color: var(--text-primary);
    background: var(--bg-card);
}

.category-btn:hover .cat-icon {
    transform: scale(1.1);
}

.category-btn:hover .cat-count {
    background: rgb(139 101 139 / 15%);
    color: var(--accent-purple);
}

.category-btn.active {
    background: var(--bg-card);
    border-color: var(--accent-purple);
    color: var(--text-primary);
    box-shadow:
        0 0 0 1px var(--accent-purple),
        0 2px 12px rgb(139 101 139 / 20%);
}

.category-btn.active .cat-count {
    background: var(--accent-purple);
    color: var(--bg-deep);
}

.category-btn.active .cat-icon {
    transform: scale(1.1);
}

/* 特殊标签样式 - 更亮的背景 */
.category-btn-special {
    background: rgb(139 101 139 / 15%);
    border-color: rgb(139 101 139 / 40%);
    color: var(--text-primary);
}

.category-btn-special:hover {
    background: rgb(139 101 139 / 25%);
    border-color: var(--accent-purple);
}

.category-btn-special.active {
    background: var(--accent-purple);
    border-color: var(--accent-purple);
    color: white;
}

.category-btn-special.active .cat-count {
    background: white;
    color: var(--accent-purple);
}

/* Light theme adjustments */
[data-theme='light'] .category-btn.active {
    background: rgb(139 101 139 / 12%);
    box-shadow:
        0 0 0 1px var(--accent-purple),
        0 2px 12px rgb(139 101 139 / 15%);
}

[data-theme='light'] .category-btn:hover .cat-count {
    background: rgb(139 101 139 / 12%);
}

[data-theme='light'] .category-btn-special {
    background: rgb(139 101 139 / 12%);
    border-color: rgb(139 101 139 / 30%);
}

[data-theme='light'] .category-btn-special:hover {
    background: rgb(139 101 139 / 20%);
}

[data-theme='light'] .category-btn-special.active {
    background: var(--accent-purple);
    color: white;
}

.tools-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    will-change: contents;
    contain: layout style;
    min-height: 120px;
    transition: opacity 0.22s ease, transform 0.22s ease;
}

@media (min-width: 768px) {
    .tools-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (min-width: 1200px) {
    .tools-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

.tool-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 18px;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    gap: 10px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
    transform: translateZ(0);
    backface-visibility: hidden;
    will-change: transform;
    contain: layout paint;
}

.tools-grid.is-fade-out {
    opacity: 0;
    transform: translateY(6px);
}

.tools-grid.is-fade-in {
    opacity: 1;
    animation: tools-grid-fade-in 0.24s ease;
}

@keyframes tools-grid-fade-in {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.tool-card::before {
    content: '';
    position: absolute;
    top: -1px;
    left: -1px;
    right: -1px;
    height: 3px;
    background: linear-gradient(90deg, var(--card-accent, var(--accent-purple)), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.tool-card:hover {
    border-color: var(--card-accent, var(--accent-purple));
    background: var(--bg-card-hover);
    transform: translateY(-3px);
    box-shadow: 0 8px 24px -8px rgb(0 0 0 / 40%);
}

.tool-card:hover::before {
    opacity: 1;
}

.tool-card-header {
    display: flex;
    align-items: center;
    gap: 14px;
}

.tool-title-group {
    display: flex;
    align-items: center;
    gap: 14px;
    flex: 1;
}

.tool-icon {
    width: 44px;
    height: 44px;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: 18px;
    color: var(--card-accent, var(--accent-purple));
    flex-shrink: 0;
    transition: all 0.3s ease;
}

.tool-card:hover .tool-icon {
    background: var(--card-accent, var(--accent-purple));
    border-color: var(--card-accent, var(--accent-purple));
    color: var(--bg-deep);
    transform: scale(1.05);
}

.tool-card h3 {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    line-height: 1.3;
}

.tool-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
    flex-grow: 1;
}

.tool-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 4px;
}

/* 标签样式 */
.tool-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.tool-tag-item {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem;
    font-weight: 500;
    padding: 4px 10px;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    transition: all 0.25s ease;
}

.tool-tag-item:hover {
    border-color: var(--accent-purple);
    color: var(--accent-purple);
    background: rgb(139 101 139 / 10%);
}

.tool-arrow {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.2rem;
    color: var(--text-muted);
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.tool-card:hover .tool-arrow {
    color: var(--card-accent, var(--accent-purple));
    transform: translateX(4px);
}

.tool-card.hidden {
    display: none;
}

/* 分类颜色 */
.tool-card[data-category='dev'] {
    --card-accent: var(--accent-purple);
}

.tool-card[data-category='text'] {
    --card-accent: var(--accent-blue);
}

.tool-card[data-category='time'] {
    --card-accent: var(--accent-yellow);
}

.tool-card[data-category='generator'] {
    --card-accent: var(--accent-magenta);
}

.tool-card[data-category='privacy'] {
    --card-accent: var(--accent-purple-dark);
}

.tool-card[data-category='media'] {
    --card-accent: var(--accent-red);
}

.tool-card[data-category='security'] {
    --card-accent: var(--accent-orange);
}

.tool-card[data-category='network'] {
    --card-accent: var(--accent-green);
}

.tool-card[data-category='calculator'] {
    --card-accent: #f97316;
}

.tool-card[data-category='converter'] {
    --card-accent: #a855f7;
}

.tool-card[data-category='extractor'] {
    --card-accent: #ec4899;
}

.tool-card[data-category='ai'] {
    --card-accent: #6366f1;
}

.favorite-btn {
    width: 36px;
    height: 36px;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 16px;
    transition: all 0.25s ease;
    color: var(--text-muted);
    flex-shrink: 0;
    margin-left: auto;
}

.favorite-btn:hover {
    border-color: var(--accent-yellow);
    background: var(--bg-card-hover);
    color: var(--accent-yellow);
    box-shadow: 0 0 0 3px rgb(254 228 64 / 15%);
}

.favorite-btn.active {
    background: var(--accent-yellow);
    border-color: var(--accent-yellow);
    color: var(--bg-deep);
}

.favorite-btn.active:hover {
    box-shadow: 0 0 0 3px rgb(254 228 64 / 25%);
}

.favorite-btn:focus-visible {
    outline: none;
    border-color: var(--accent-yellow);
    box-shadow: 0 0 0 3px rgb(254 228 64 / 20%);
}

.tool-card:focus-visible {
    outline: none;
    border-color: var(--card-accent, var(--accent-purple));
    box-shadow:
        0 0 0 3px rgb(139 101 139 / 15%),
        0 8px 24px -8px rgb(0 0 0 / 40%);
    transform: translateY(-3px);
}

.no-results {
    text-align: center;
    padding: 60px 20px;
    display: none;
}

.no-results.show {
    display: block;
}

.no-results-icon {
    font-size: 3rem;
    margin-bottom: 16px;
    opacity: 0.5;
}

.no-results p {
    font-family: 'JetBrains Mono', monospace;
    color: var(--text-muted);
    font-size: 1rem;
}

/* Footer 样式 */
.site-footer {
    border-top: 1px solid var(--border-subtle);
    padding: 5px 0;
}

.site-footer .container {
    padding-top: 5px;
    padding-bottom: 5px;
}

.site-footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.site-footer-left {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.85rem;
}

.site-footer-left a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.site-footer-left a:hover {
    color: var(--accent-purple);
}

.site-footer-left img {
    vertical-align: middle;
    width: 14px;
    height: 14px;
}

.footer-divider {
    color: var(--text-muted);
    opacity: 0.5;
}

.site-footer-right {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.site-footer-right a {
    color: var(--accent-purple);
    text-decoration: none;
    transition: color 0.2s;
}

.site-footer-right a:hover {
    color: var(--accent-purple-light);
    text-decoration: underline;
}

@keyframes fade-in-up {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 加载指示器 */
#load-trigger {
    height: 1px;
    margin: 0;
    visibility: hidden;
}

@media (width <= 640px) {
    .container {
        padding: 16px 12px 30px;
    }

    /* Header 移动端布局 */
    header {
        flex-direction: row;
        flex-wrap: nowrap;
        align-items: center;
        justify-content: space-between;
        gap: 8px;
        margin-bottom: 16px;
    }

    .header-left {
        flex: 1;
        min-width: 0;
    }

    .header-right {
        flex-shrink: 0;
        gap: 8px;
    }

    .hero-stats {
        gap: 8px;
    }

    .stat-item {
        gap: 2px;
    }

    .stat-number {
        font-size: 0.9rem;
    }

    .stat-label {
        font-size: 0.65rem;
    }

    .stat-divider {
        height: 12px;
    }

    .logo {
        gap: 8px;
    }

    .logo-img {
        width: 28px;
        height: 28px;
    }

    header h1 {
        font-size: 1rem;
    }

    .theme-toggle {
        width: 28px;
        height: 28px;
        font-size: 0.85rem;
        border-radius: 6px;
    }

    /* 搜索框 */
    .search-wrapper {
        position: sticky;
        top: 0;
        z-index: 100;
        margin: 0 -12px 8px;
        padding: 8px 12px 6px;
        background: var(--bg-deep);
        backdrop-filter: blur(10px);
        border-bottom: 1px solid var(--border-subtle);
    }

    .search-box input {
        padding: 10px 14px 10px 36px;
        font-size: 16px;
        border-radius: 16px;
        -webkit-appearance: none;
    }

    .search-box::before {
        left: 12px;
        font-size: 0.9rem;
    }

    .search-results-count {
        display: none;
    }

    /* 分类区域 */
    .categories-wrapper {
        margin: 0 0 24px;
    }

    .categories {
        gap: 6px;
        justify-content: flex-start;
    }

    .category-btn {
        padding: 5px 8px;
        font-size: 0.65rem;
        white-space: nowrap;
        flex-shrink: 0;
        -webkit-tap-highlight-color: transparent;
        touch-action: manipulation;
        border-radius: 12px;
        box-shadow: none;
        border-width: 1px;
        gap: 4px;
    }

    .category-btn .cat-icon {
        font-size: 0.8rem;
    }

    .category-btn .cat-count {
        display: none;
    }

    .category-btn.active {
        box-shadow: 0 0 0 1.5px var(--accent-purple);
        transform: none;
    }

    /* 工具卡片 */
    .tools-grid {
        grid-template-columns: 1fr;
        gap: 12px;
        margin-bottom: 20px;
    }

    .tool-card {
        padding: 14px;
        gap: 8px;
        -webkit-tap-highlight-color: transparent;
        touch-action: manipulation;
    }

    .tool-icon {
        width: 38px;
        height: 38px;
        font-size: 17px;
    }

    .tool-title-group {
        gap: 12px;
    }

    .tool-card h3 {
        font-size: 1rem;
        font-weight: 600;
    }

    .tool-card p {
        font-size: 0.85rem;
        line-height: 1.6;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .tool-tags {
        gap: 4px;
    }

    .tool-tag-item {
        font-size: 0.65rem;
        padding: 3px 8px;
    }

    .tool-arrow {
        font-size: 1.1rem;
    }

    /* 收藏按钮 */
    .favorite-btn {
        width: 40px;
        height: 40px;
        font-size: 16px;
        position: relative;
    }

    .favorite-btn::before {
        content: '';
        position: absolute;
        top: -8px;
        left: -8px;
        right: -8px;
        bottom: -8px;
    }

    /* Footer - 移动端换行显示 */
    .site-footer {
        padding: 5px 0;
    }

    .site-footer-content {
        flex-direction: column;
        align-items: center;
        gap: 8px;
    }

    .site-footer-left {
        font-size: 0.75rem;
        gap: 8px;
        flex-wrap: wrap;
        justify-content: center;
    }

    /* 移动端隐藏分隔符 */
    .footer-divider {
        display: none;
    }

    .site-footer-right {
        font-size: 0.7rem;
    }
}