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

:root {
    --clr-primary: #6366f1;
    --clr-primary-dark: #4f46e5;
    --clr-primary-light: #a5b4fc;
    --clr-accent: #06b6d4;
    --clr-accent-light: #67e8f9;
    --clr-bg: #f8fafc;
    --clr-surface: #ffffff;
    --clr-text: #0f172a;
    --clr-text-secondary: #475569;
    --clr-text-tertiary: #94a3b8;
    --clr-border: #e2e8f0;
    --clr-border-light: #f1f5f9;
    --clr-muted: #f1f5f9;
    --clr-code-bg: #0f172a;
    --clr-success: #10b981;
    --clr-warning: #f59e0b;
    --clr-error: #ef4444;
    --clr-gradient: linear-gradient(135deg, #6366f1, #06b6d4);
    --clr-gradient-soft: linear-gradient(135deg, #eef2ff, #ecfeff);
    --shadow-sm: 0 1px 2px rgba(0,0,0,.04), 0 1px 3px rgba(0,0,0,.06);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,.06), 0 2px 4px -2px rgba(0,0,0,.04);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,.07), 0 4px 6px -4px rgba(0,0,0,.04);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,.08), 0 8px 10px -6px rgba(0,0,0,.04);
    --shadow-glow: 0 0 20px rgba(99,102,241,.12);
    --radius-sm: 6px;
    --radius: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
    --max-w: 1120px;
    --header-h: 72px;
    --transition: .2s cubic-bezier(.4,0,.2,1);
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font);
    background: var(--clr-bg);
    background-image:
        radial-gradient(ellipse 70% 50% at 50% -20%, rgba(99,102,241,.07), transparent),
        radial-gradient(ellipse 50% 40% at 80% 110%, rgba(6,182,212,.05), transparent);
    color: var(--clr-text);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-attachment: fixed;
}

a {
    color: var(--clr-primary);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--clr-primary-dark);
}

img {
    max-width: 100%;
    height: auto;
}

::selection {
    background: var(--clr-primary);
    color: #fff;
}

header {
    background: rgba(255,255,255,.8);
    backdrop-filter: blur(16px) saturate(1.1);
    -webkit-backdrop-filter: blur(16px) saturate(1.1);
    border-bottom: 1px solid var(--clr-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

header > .header-inner {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    min-height: var(--header-h);
    gap: 16px;
}

header .logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    flex-shrink: 0;
}

header .logo img {
    height: 30px;
    width: auto;
    flex-shrink: 0;
    transition: transform var(--transition);
}

header .logo:hover img {
    transform: scale(1.04);
}

header .logo h1 {
    font-size: 1.15rem;
    font-weight: 800;
    letter-spacing: -.03em;
    background: var(--clr-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0;
    padding: 0;
}

header .logo-icon {
    display: inline-flex;
    align-items: center;
    text-decoration: none;
    flex-shrink: 0;
    transition: opacity var(--transition), transform var(--transition);
}

header .logo-icon:hover {
    opacity: .7;
    transform: scale(1.04);
}

header .logo-icon img {
    height: 26px;
    width: auto;
}

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

header .header-title h1 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--clr-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

header .header-title p {
    font-size: .78rem;
    color: var(--clr-text-tertiary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

header nav {
    flex-shrink: 0;
}

header nav > ul {
    display: flex;
    gap: 2px;
    list-style: none;
    overflow-x: auto;
    -ms-overflow-style: none;
    scrollbar-width: none;
}

header nav > ul::-webkit-scrollbar {
    display: none;
}

header nav a {
    display: block;
    padding: 6px 12px;
    font-size: .82rem;
    font-weight: 500;
    color: var(--clr-text-tertiary);
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    white-space: nowrap;
}

header nav a:hover {
    color: var(--clr-primary);
    background: var(--clr-muted);
}

.breadcrumbs {
    display: flex;
    align-items: center;
    gap: 4px;
    flex-wrap: wrap;
    padding: 12px 0 0;
    font-size: .78rem;
    color: var(--clr-text-tertiary);
}

.breadcrumbs a {
    color: var(--clr-text-tertiary);
    padding: 2px 6px;
    border-radius: 4px;
    transition: all var(--transition);
}

.breadcrumbs a:hover {
    color: var(--clr-primary);
    background: var(--clr-muted);
}

.breadcrumbs .sep {
    color: var(--clr-border);
    font-size: .7rem;
    user-select: none;
}

.breadcrumbs .current {
    color: var(--clr-text-secondary);
    font-weight: 500;
    padding: 2px 6px;
}

.sitemap-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 24px;
}

.sitemap-group {
    background: var(--clr-surface);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius);
    padding: 20px 24px;
}

.sitemap-group h3 {
    font-size: 1rem;
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--clr-border-light);
}

.sitemap-group ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sitemap-group li {
    margin-bottom: 4px;
    font-size: .9rem;
}

.sitemap-group a {
    display: block;
    padding: 4px 8px;
    border-radius: 4px;
    transition: all var(--transition);
}

.sitemap-group a:hover {
    background: var(--clr-muted);
}

.sitemap-group .desc {
    font-size: .78rem;
    color: var(--clr-text-tertiary);
    margin-left: 8px;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
    margin-left: auto;
    color: var(--clr-text);
    border-radius: var(--radius-sm);
    transition: background var(--transition);
}

.nav-toggle:hover {
    background: var(--clr-muted);
}

.nav-toggle svg {
    width: 22px;
    height: 22px;
    display: block;
}

main {
    flex: 1;
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 48px 24px 72px;
    width: 100%;
}

main > section, main > article {
    margin-bottom: 48px;
}

main h2 {
    font-size: 1.65rem;
    font-weight: 700;
    letter-spacing: -.025em;
    margin-bottom: 20px;
    color: var(--clr-text);
    position: relative;
}

main h2:not(.no-line)::after {
    content: '';
    display: block;
    width: 40px;
    height: 3px;
    background: var(--clr-gradient);
    border-radius: 2px;
    margin-top: 8px;
}

main h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--clr-text);
    letter-spacing: -.01em;
}

main h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--clr-text);
}

main p {
    margin-bottom: 14px;
    color: var(--clr-text-secondary);
    line-height: 1.7;
}

main p strong {
    color: var(--clr-text);
    font-weight: 600;
}

.hero-row {
    display: flex;
    gap: 48px;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 48px;
}

.hero-row > div:first-child {
    flex: 1;
    min-width: 300px;
}

.hero-row > div:last-child {
    flex: 0 0 180px;
    opacity: .55;
}

.hero-row > div:last-child img {
    width: 100%;
    height: auto;
}

.hero-row h2 {
    font-size: 2rem;
    letter-spacing: -.03em;
    margin-bottom: 16px;
}

.hero-row h2::after {
    width: 48px;
    height: 4px;
}

.hero-row p {
    font-size: 1.05rem;
    color: var(--clr-text-tertiary);
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.card-grid article {
    margin-bottom: 0;
}

.feature-card {
    background: var(--clr-surface);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius);
    padding: 28px 24px;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--clr-gradient);
    opacity: 0;
    transition: opacity var(--transition);
}

.feature-card:hover {
    box-shadow: var(--shadow-lg);
    border-color: var(--clr-primary-light);
    transform: translateY(-2px);
}

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

.feature-card h3 {
    font-size: 1.05rem;
    margin-bottom: 8px;
}

.feature-card p {
    font-size: .92rem;
    margin-bottom: 0;
}

.feature-card .card-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: var(--clr-gradient-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 12px;
    font-size: 1.1rem;
}

article, section > section {
    background: var(--clr-surface);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius);
    padding: 28px 28px;
    margin-bottom: 20px;
    transition: box-shadow var(--transition), transform var(--transition);
}

article:hover {
    box-shadow: var(--shadow-md);
}

blockquote {
    margin: 20px 0;
    padding: 20px 24px;
    border-left: 3px solid var(--clr-primary);
    background: var(--clr-muted);
    border-radius: 0 var(--radius) var(--radius) 0;
    font-style: italic;
    position: relative;
}

blockquote p {
    margin-bottom: 6px;
    color: var(--clr-text);
    font-size: 1.02rem;
}

blockquote footer {
    font-style: normal;
    font-size: .85rem;
    color: var(--clr-text-tertiary);
    margin-top: 8px;
}

blockquote footer::before {
    content: '\2014\00a0';
}

ul, ol {
    padding-left: 22px;
    margin-bottom: 16px;
    color: var(--clr-text-secondary);
}

li {
    margin-bottom: 6px;
    line-height: 1.65;
}

li strong {
    color: var(--clr-text);
}

dl {
    margin-bottom: 16px;
}

dt {
    font-weight: 600;
    color: var(--clr-text);
    margin-top: 14px;
    margin-bottom: 4px;
    font-size: .95rem;
}

dd {
    color: var(--clr-text-secondary);
    padding-left: 0;
    margin-bottom: 10px;
    line-height: 1.65;
}

table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin-bottom: 24px;
    font-size: .88rem;
    background: var(--clr-surface);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius);
    overflow: hidden;
}

thead {
    background: var(--clr-muted);
}

th {
    font-weight: 600;
    text-align: left;
    padding: 12px 16px;
    color: var(--clr-text);
    font-size: .75rem;
    text-transform: uppercase;
    letter-spacing: .05em;
    border-bottom: 1px solid var(--clr-border);
}

td {
    padding: 11px 16px;
    border-bottom: 1px solid var(--clr-border-light);
    color: var(--clr-text-secondary);
}

tr:last-child td {
    border-bottom: none;
}

tbody tr {
    transition: background calc(var(--transition)/2);
}

tbody tr:hover {
    background: var(--clr-muted);
}

code {
    font-family: var(--font-mono);
    font-size: .85em;
    padding: 2px 7px;
    background: var(--clr-muted);
    border: 1px solid var(--clr-border);
    border-radius: 5px;
    color: var(--clr-primary-dark);
}

pre {
    font-family: var(--font-mono);
    font-size: .85rem;
    background: var(--clr-code-bg);
    color: #cbd5e1;
    padding: 20px 24px;
    border-radius: var(--radius);
    overflow-x: auto;
    margin-bottom: 20px;
    line-height: 1.6;
    tab-size: 4;
}

pre code {
    background: none;
    border: none;
    padding: 0;
    color: inherit;
    font-size: inherit;
}

figure {
    margin-bottom: 24px;
}

figcaption {
    font-size: .82rem;
    color: var(--clr-text-tertiary);
    text-align: center;
    margin-top: 8px;
    font-style: italic;
}

address {
    font-style: normal;
    color: var(--clr-text-secondary);
    line-height: 1.7;
}

address a {
    color: var(--clr-primary);
}

hr {
    border: none;
    border-top: 1px solid var(--clr-border);
    margin: 36px 0;
}

aside {
    background: linear-gradient(135deg, var(--clr-muted), #eef2ff);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius);
    padding: 24px 28px;
    margin-bottom: 24px;
}

aside h3 {
    font-size: 1rem;
    margin-bottom: 8px;
}

aside p {
    font-size: .9rem;
    margin-bottom: 0;
}

footer {
    background: var(--clr-surface);
    border-top: 1px solid var(--clr-border);
    padding: 36px 24px 28px;
    text-align: center;
    margin-top: auto;
}

footer .footer-inner {
    max-width: var(--max-w);
    margin: 0 auto;
}

footer nav ul {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2px;
    list-style: none;
    padding: 0;
    margin-bottom: 20px;
}

footer nav a {
    padding: 5px 12px;
    font-size: .8rem;
    color: var(--clr-text-tertiary);
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}

footer nav a:hover {
    color: var(--clr-primary);
    background: var(--clr-muted);
}

footer .footer-divider {
    width: 40px;
    height: 2px;
    background: var(--clr-gradient);
    border-radius: 1px;
    margin: 0 auto 16px;
}

footer small {
    font-size: .78rem;
    color: var(--clr-text-tertiary);
}

footer small a {
    color: inherit;
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-color: var(--clr-border);
    transition: all var(--transition);
}

footer small a:hover {
    color: var(--clr-primary);
    text-decoration-color: var(--clr-primary);
}

footer .footer-brand {
    font-weight: 700;
    background: var(--clr-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.back-to-top {
    position: fixed;
    bottom: 28px;
    right: 28px;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--clr-gradient);
    color: #fff;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 14px rgba(99,102,241,.3);
    opacity: 0;
    transform: translateY(12px);
    pointer-events: none;
    transition: opacity .3s ease, transform .3s ease, box-shadow .3s ease;
    z-index: 50;
}

.back-to-top.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 24px rgba(99,102,241,.4);
}

.back-to-top:active {
    transform: translateY(0);
}

.back-to-top svg {
    width: 18px;
    height: 18px;
}

.blog-list article {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    padding: 20px 24px;
}

.blog-list article .blog-marker {
    flex-shrink: 0;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--clr-primary);
    margin-top: 8px;
    opacity: .5;
}

.blog-list article h3 {
    font-size: 1.05rem;
    margin-bottom: 4px;
}

.blog-list article h3 a {
    color: var(--clr-text);
    transition: color var(--transition);
}

.blog-list article h3 a:hover {
    color: var(--clr-primary);
}

.blog-list article p {
    font-size: .9rem;
    color: var(--clr-text-tertiary);
    margin-bottom: 0;
}

.tag {
    display: inline-block;
    padding: 2px 10px;
    font-size: .75rem;
    font-weight: 500;
    color: var(--clr-primary);
    background: #eef2ff;
    border-radius: 100px;
    white-space: nowrap;
}

.tag-accent {
    background: #ecfeff;
    color: #0e7490;
}

.tag-success {
    background: #ecfdf5;
    color: #047857;
}

.nav-links {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    padding-top: 8px;
    margin-top: 32px;
    border-top: 1px solid var(--clr-border);
}

.nav-links a {
    font-size: .9rem;
    font-weight: 500;
    padding: 8px 16px;
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}

.nav-links a:hover {
    border-color: var(--clr-primary-light);
    background: var(--clr-muted);
}

@media (max-width: 860px) {
    header > .header-inner {
        flex-wrap: wrap;
        min-height: 0;
        padding-top: 10px;
        padding-bottom: 6px;
    }

    header .header-title {
        order: -1;
        flex-basis: 100%;
    }

    header .header-title h1 {
        font-size: .95rem;
    }

    header .header-title p {
        display: none;
    }

    header nav > ul {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(255,255,255,.98);
        backdrop-filter: blur(12px);
        border-bottom: 1px solid var(--clr-border);
        padding: 8px 16px 12px;
        gap: 2px;
        box-shadow: var(--shadow-lg);
    }

    header nav > ul.open {
        display: flex;
    }

    header nav a {
        padding: 10px 14px;
        font-size: .9rem;
    }

    .nav-toggle {
        display: block;
    }

    .hero-row h2 {
        font-size: 1.5rem;
    }

    .hero-row > div:last-child {
        flex-basis: 120px;
    }

    .card-grid {
        grid-template-columns: 1fr;
    }

    main {
        padding: 32px 16px 48px;
    }

    main h2 {
        font-size: 1.35rem;
    }

    article, section > section, .feature-card {
        padding: 20px 18px;
    }

    table {
        font-size: .78rem;
        display: block;
        overflow-x: auto;
    }

    th, td {
        padding: 8px 10px;
    }
}

@media (max-width: 480px) {
    header .logo img {
        height: 24px;
    }

    header .logo h1 {
        font-size: 1rem;
    }

    header .logo-icon img {
        height: 22px;
    }

    main h2 {
        font-size: 1.2rem;
    }

    blockquote {
        padding: 14px 16px;
    }

    blockquote p {
        font-size: .95rem;
    }

    .hero-row h2 {
        font-size: 1.3rem;
    }

    .hero-row > div:last-child {
        display: none;
    }

.blog-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.blog-article > * {
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
}

.blog-article {
    padding-bottom: 0;
}

.blog-article h1 {
    font-size: 1.8rem;
    font-weight: 800;
    letter-spacing: -.03em;
    margin-bottom: 8px;
    line-height: 1.3;
}

.blog-article > header {
    all: unset;
    display: block;
    max-width: 720px;
    margin: 0 auto 36px;
    padding: 0 24px;
    text-align: center;
}

.blog-article > header h1 {
    font-size: 2rem;
}

.blog-article > header p {
    font-size: 1rem;
    color: var(--clr-text-tertiary);
}

.nav-links {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 48px;
    padding-top: 24px;
    border-top: 1px solid var(--clr-border);
}

.nav-links a {
    font-size: .85rem;
    font-weight: 500;
    padding: 8px 18px;
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    color: var(--clr-text-secondary);
}

.nav-links a:hover {
    border-color: var(--clr-primary-light);
    background: var(--clr-muted);
    color: var(--clr-primary);
}

.back-to-top {
        bottom: 16px;
        right: 16px;
        width: 38px;
        height: 38px;
    }

    .back-to-top svg {
        width: 16px;
        height: 16px;
    }

    footer {
        padding: 28px 16px 24px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        transition-duration: .01ms !important;
        animation-duration: .01ms !important;
    }
}