:root { color-scheme: light; --blue: #155dfc; --ink: #111827; --muted: #4b5563; --line: #e5e7eb; --paper: #f9fafb; }
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 96px; }
body { margin: 0; font-family: Inter, Arial, sans-serif; color: #171717; background: #fff; font-size: 16px; line-height: 1.5; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
button, summary { cursor: pointer; }
button { color: inherit; }
img, svg { max-width: 100%; }
[hidden] { display: none !important; }
:focus-visible { outline: 3px solid #93c5fd; outline-offset: 3px; }
h1, h2, h3, h4 { color: var(--ink); margin: 0; font-weight: 700; }
p { margin: 0; }
.container { width: 100%; max-width: 1280px; padding: 0 32px; margin: 0 auto; }
.site-shell { min-height: 100vh; display: flex; flex-direction: column; }
.page-content { flex: 1; min-height: 100vh; }
.site-header { position: sticky; top: 0; z-index: 50; background: #fff; border-bottom: 1px solid var(--line); box-shadow: 0 1px 2px #0000000d; }
.header-inner { height: 64px; display: flex; justify-content: space-between; align-items: center; }
.brand { font-size: 24px; line-height: 32px; font-weight: 700; white-space: nowrap; }
.main-nav { display: flex; align-items: center; gap: 32px; }
.main-nav > a { padding: 8px 12px; font-size: 14px; line-height: 20px; font-weight: 500; color: #374151; }
.main-nav > a:hover { color: var(--blue); }
.main-nav .nav-submit { padding: 8px 16px; border: 1px solid var(--blue); color: var(--blue); border-radius: 8px; font-weight: 600; }
.main-nav .nav-submit.active { display: none; }
.nav-submit:hover { background: #eff6ff; }
.header-actions { display: none; }
.menu-toggle { background: transparent; border: 0; padding: 8px; width: 40px; height: 40px; display: flex; flex-direction: column; justify-content: center; gap: 5px; }
.menu-toggle span { display: block; height: 2px; width: 20px; background: #374151; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border-radius: 8px; border: 2px solid transparent; font-weight: 600; font-size: 16px; line-height: 24px; padding: 12px 32px; transition: background .15s, box-shadow .15s; }
.button-light { background: var(--blue); color: #fff; border-color: var(--blue); box-shadow: 0 4px 6px -1px #0000001a, 0 2px 4px -2px #0000001a; }
.button-light:hover { background: #1447e6; }
.button-ghost { background: #fff; color: var(--blue); border-color: var(--blue); }
.button-ghost:hover { background: #eff6ff; }
.hero-actions { display: flex; justify-content: center; gap: 16px; }
.home-hero { background: linear-gradient(135deg, #fff, #eff6ff); text-align: center; padding: 80px 0; }
.home-hero h1 { font-size: 60px; line-height: 60px; margin: 0 0 24px; }
.home-hero h1 span { display: block; margin-top: 8px; }
.lede { color: var(--muted); font-size: 20px; line-height: 28px; max-width: 768px; }
.home-hero .lede { margin: 0 auto 32px; }
.home-hero .button { font-size: 18px; line-height: 28px; padding: 16px 32px; }
.home-hero .button-light { font-weight: 700; padding: 16px 40px; }
.home-hero .button-ghost { color: #1f2937; border-color: #1f2937; }
.home-section { padding: 80px 0; background: #fff; }
.section-heading { text-align: center; margin-bottom: 64px; }
.section-heading h2 { font-size: 36px; line-height: 40px; margin-bottom: 16px; }
.section-heading p { max-width: 672px; margin: 0 auto; font-size: 20px; line-height: 28px; color: var(--muted); }
.feature-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 32px; }
.feature-card { background: #fff; border: 1px solid var(--line); border-radius: 12px; box-shadow: 0 1px 2px #0000000d; padding: 32px; text-align: center; display: flex; flex-direction: column; justify-content: space-between; }
.feature-icon { width: 64px; height: 64px; border-radius: 50%; display: flex; align-items: center; justify-content: center; margin: 0 auto; }
.feature-icon svg { width: 24px; height: 24px; }
.feature-card h3 { font-size: 20px; line-height: 28px; font-weight: 600; margin-bottom: 16px; }
.feature-card p { color: var(--muted); font-size: 16px; line-height: 24px; }
.feature-link { display: inline-flex; align-items: center; justify-content: center; gap: 4px; align-self: center; background: #eff6ff; border-radius: 8px; color: var(--blue); padding: 8px 16px; font-weight: 600; margin-top: 24px; }
.feature-link:hover { background: #dbeafe; }
.home-benefits { padding: 64px 0; }
.home-benefits .section-heading { margin-bottom: 48px; }
.benefit-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 32px; }
.home-featured { background: var(--paper); }
.featured-group { margin-bottom: 64px; }
.featured-group h3 { text-align: center; font-size: 24px; line-height: 32px; font-weight: 600; margin-bottom: 32px; }
.featured-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.featured-card { background: #fff; padding: 24px; border: 1px solid var(--line); border-radius: 8px; box-shadow: 0 1px 2px #0000000d; }
.featured-card h4 { font-size: 18px; line-height: 28px; font-weight: 600; margin-bottom: 8px; }
.featured-card p { font-size: 14px; line-height: 20px; color: var(--muted); }
.featured-card:hover, .entry-card:hover, .catalog-card:hover { box-shadow: 0 4px 6px -1px #0000001a, 0 2px 4px -2px #0000001a; }
.learning-cta { text-align: center; background: #fff; border-top: 1px solid var(--line); padding: 64px 0; }
.learning-cta h2 { font-size: 30px; line-height: 36px; margin-bottom: 16px; }
.learning-cta p { max-width: 672px; font-size: 20px; line-height: 28px; margin: 0 auto 32px; color: var(--muted); }
.inner-hero { background: linear-gradient(135deg, #fff, #eff6ff); border-bottom: 1px solid var(--line); padding: 48px 0; }
.use-cases-hero { padding: 64px 0; }
.glossary-hero .lede { max-width: 820px; }
.inner-hero > .container { text-align: center; }
.inner-hero h1 { font-size: 48px; line-height: 48px; margin-bottom: 16px; }
.inner-hero .lede { max-width: 768px; margin: 0 auto; }
.display em, .section-title em { font-style: normal; }
.eyebrow { display: block; font-size: 14px; color: #6b7280; margin-bottom: 12px; }
.hero-count { margin-top: 24px; color: #6b7280; }
.catalog-toolbar { background: #fff; border-bottom: 1px solid var(--line); padding: 32px 0; }
.filter-row-centered { justify-content: center; }
.toolbar { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.search-box { flex: 1; max-width: 448px; }
.search-box input { width: 100%; border: 1px solid #d1d5db; border-radius: 8px; padding: 12px 16px; background: #fff; color: var(--ink); }
.search-hint, .count-note { color: #6b7280; font-size: 14px; }
.alphabet-section { padding: 32px 0; border-bottom: 1px solid var(--line); background: #fff; }
.alphabet { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; }
.alphabet a, .alphabet button { display: inline-flex; align-items: center; justify-content: center; min-width: 40px; padding: 8px 12px; font-weight: 500; border-radius: 8px; background: #f3f4f6; border: 0; }
.alphabet a:hover { background: #e5e7eb; }
.glossary-search { max-width: 672px; margin: 0 auto; }
.glossary-search input { width: 100%; border: 1px solid #d1d5db; border-radius: 8px; padding: 12px 16px; background: #fff; color: var(--ink); }
.glossary-alphabet { gap: 0; }
.glossary-alphabet a { min-width: 24px; padding: 8px 6px; background: transparent; border-radius: 0; }
.glossary-alphabet a:hover { color: var(--blue); background: transparent; }
.catalog-section { padding: 64px 0; }
.catalog-surface { background: #f9fafb; }
.catalog-group { margin-bottom: 48px; scroll-margin-top: 96px; }
.catalog-group:last-child { margin-bottom: 0; }
.catalog-group > h2 { font-size: 30px; line-height: 36px; margin-bottom: 32px; }
.catalog-group .group-letter { min-height: 48px; display: flex; align-items: center; padding-left: 14px; }
.catalog-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.blog-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: 32px; }
.blog-catalog { padding-top: 48px; }
.entry-card, .catalog-card, .blog-card { min-width: 0; display: block; padding: 24px; border: 1px solid var(--line); border-radius: 8px; background: #fff; box-shadow: 0 1px 2px #0000000d; transition: box-shadow .15s; }
.entry-card h3, .catalog-card h3, .blog-card h3 { font-weight: 600; font-size: 18px; line-height: 28px; margin-bottom: 8px; }
.entry-card > p, .catalog-card > p { color: var(--muted); font-size: 14px; line-height: 20px; margin-bottom: 12px; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.tag-row { display: flex; flex-wrap: wrap; gap: 4px; }
.tag { border-radius: 999px; font-size: 12px; line-height: 16px; font-weight: 500; padding: 2px 8px; background: #f3f4f6; color: var(--muted); }
.filter-row { display: flex; flex-wrap: wrap; gap: 8px; }
.filter-button { border: 0; border-radius: 8px; background: #f3f4f6; font-weight: 500; font-size: 14px; line-height: 20px; padding: 8px 16px; }
.filter-row-centered .filter-button { padding-inline: 12px; }
.filter-button.active { color: #fff; background: #2563eb; }
.filter-button:hover { background: #e5e7eb; color: #171717; }
.catalog-card-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; margin-bottom: 8px; }
.catalog-card-header h3 { margin: 0; }
.price { font-size: 12px; line-height: 16px; padding: 4px 8px; font-weight: 500; background: #dcfce7; color: #166534; border-radius: 999px; }
.card-meta { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; font-size: 12px; line-height: 16px; color: #6b7280; margin-bottom: 12px; }
.model-company { font-size: 14px; color: #6b7280; display: block; margin-bottom: 12px; }
.model-groups .catalog-group > h2 { margin-bottom: 32px; }
.model-card { min-height: 206px; }
.model-title-row { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; margin-bottom: 12px; }
.model-title-row h3 { margin: 0; }
.license-badge { flex: 0 0 auto; border-radius: 999px; padding: 4px 8px; font-size: 12px; line-height: 16px; font-weight: 500; }
.license-proprietary { background: #dbeafe; color: #1d4ed8; }
.license-open { background: #dcfce7; color: #166534; }
.model-card > p { min-height: 60px; }
.model-facts { display: flex; justify-content: space-between; gap: 12px; color: #6b7280; font-size: 12px; line-height: 16px; margin: 12px 0; }
.model-facts span:last-child { text-align: right; }
.model-tags { align-items: center; }
.tool-logo { font-size: 24px; line-height: 32px; }
.article-hero { background: linear-gradient(135deg, #f9fafb, #eff6ff); border-bottom: 1px solid var(--line); padding: 32px 0 40px; }
.breadcrumbs { display: flex; align-items: center; gap: 8px; font-size: 14px; line-height: 20px; color: #6b7280; margin-bottom: 24px; }
.breadcrumbs > :last-child { color: var(--ink); font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 250px; }
.breadcrumbs a:hover { color: var(--blue); }
.article-hero h1 { font-size: 48px; line-height: 48px; margin-bottom: 24px; overflow-wrap: break-word; hyphens: auto; }
.article-lede { font-size: 20px; line-height: 28px; max-width: 768px; color: var(--muted); }
.article-meta { font-size: 14px; line-height: 20px; color: #6b7280; margin-top: 20px; }
.article-title-row { display: flex; align-items: center; gap: 12px; margin-bottom: 24px; }
.article-title-row h1 { margin: 0; }
.article-badge { flex: 0 0 auto; border-radius: 999px; padding: 4px 12px; background: #dbeafe; color: #1d4ed8; font-size: 14px; line-height: 20px; font-weight: 500; }
.article-badge-featured { background: #fef3c7; color: #92400e; }
.article-developer { display: flex; align-items: center; gap: 12px; margin-bottom: 24px; }
.article-developer-icon { width: 48px; height: 48px; display: grid; place-items: center; border-radius: 12px; background: #171717; color: #fff; font-weight: 700; font-size: 18px; }
.article-developer-glyph { width: 24px; height: 24px; fill: #fff; color: #fff; }
.article-developer-fallback { line-height: 1; }
.article-developer > span:last-child { display: grid; }
.article-developer small { color: #6b7280; font-size: 12px; line-height: 16px; text-transform: uppercase; }
.article-developer strong { font-size: 16px; line-height: 24px; font-weight: 600; }
.article-facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; margin-top: 24px; }
.article-hero-ai-tools .article-facts { grid-template-columns: repeat(6, minmax(0, 1fr)); }
.article-hero-ai-tools .article-fact { grid-column: span 2; }
.article-hero-ai-tools .article-facts[data-count="5"] .article-fact:nth-child(n+4) { grid-column: span 3; }
.article-hero-ai-tools .article-facts[data-count="4"] .article-fact:nth-child(4) { grid-column: span 6; }
.article-hero-ai-tools .article-facts[data-count="2"] .article-fact { grid-column: span 3; }
.article-hero-ai-tools .article-facts[data-count="1"] .article-fact { grid-column: span 6; }
.article-fact { min-width: 0; min-height: 78px; padding: 14px 16px; border: 1px solid var(--line); border-radius: 8px; background: #ffffffd9; display: flex; flex-direction: column; justify-content: center; gap: 4px; }
.article-fact > span { color: #6b7280; font-size: 12px; line-height: 16px; text-transform: uppercase; letter-spacing: .02em; }
.article-fact > strong { color: var(--ink); font-size: 16px; line-height: 22px; font-weight: 600; overflow-wrap: anywhere; }
.article-hero-use-cases .article-fact:last-child { justify-content: flex-start; }
.article-external-links { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.article-external-link { display: inline-flex; align-items: center; gap: 8px; padding: 8px 14px; border: 1px solid #d1d5db; border-radius: 8px; background: #fff; color: #374151; font-size: 14px; line-height: 20px; }
.article-external-link:hover { background: #f9fafb; border-color: #9ca3af; }
.article-affiliate-link { border-color: var(--blue); background: var(--blue); color: #fff; font-weight: 600; }
.article-affiliate-link:hover { border-color: #1447e6; background: #1447e6; }
.article-affiliate-note { margin: 12px 0 0; color: #6b7280; font-size: 12px; line-height: 18px; }
.article-affiliate-note a { color: var(--blue); text-decoration: underline; text-underline-offset: 2px; }
.article-affiliate-note-hero { margin-top: 12px; }
.article-affiliate-callout { margin: 32px 0; padding: 24px; border: 1px solid var(--line); border-radius: 8px; background: #f9fafb; }
.article-affiliate-callout h3 { margin: 0 0 12px; color: var(--ink); font-size: 20px; line-height: 28px; }
.article-affiliate-callout > p:not(.article-affiliate-note) { margin: 0 0 16px; }
.article-affiliate-callout .button { padding: 8px 16px; font-size: 14px; line-height: 20px; }
.contact-hero .lede { max-width: 920px; }
.faq-hero { padding: 52px 0; }
.faq-hero .lede { max-width: 920px; }
.submit-hero { padding: 80px 0; }
.submit-hero h1 { margin-bottom: 24px; }
.submit-section { background: #f9fafb; }
.prose.submit-content { max-width: 832px; margin: 0 auto; padding: 0; border: 0; border-radius: 0; background: transparent; box-shadow: none; }
.submit-content ul { list-style: none; padding-left: 0; margin-bottom: 24px; }
.submit-content li { display: flex; align-items: flex-start; gap: 12px; margin-bottom: 12px; line-height: 26px; }
.submit-mark { flex: 0 0 12px; width: 12px; font-weight: 700; }
.submit-mark-yes { color: #2563eb; }
.submit-mark-no { color: #9ca3af; }
.legal-hero { padding: 80px 0; }
.legal-hero h1 { margin-bottom: 24px; }
.legal-hero-date { margin-top: 16px; color: #6b7280; font-size: 14px; line-height: 20px; }
.legal-section { background: #fff; }
.prose.legal-content { max-width: 832px; margin: 0 auto; padding: 0; border: 0; border-radius: 0; background: transparent; box-shadow: none; }
.prose.legal-content h2 { font-size: 30px; line-height: 36px; }
.article-section { padding: 32px 0; }
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 240px; gap: 40px; align-items: start; }
.article { min-width: 0; padding: 48px; background: #fff; border: 1px solid var(--line); border-radius: 8px; box-shadow: 0 1px 2px #0000000d; overflow: hidden; }
.source-content { font-size: 16px; line-height: 26px; color: #374151; overflow-wrap: break-word; }
.source-content h2 { font-size: 24px; line-height: 32px; margin: 32px 0 16px; scroll-margin-top: 96px; }
.source-content > :first-child { margin-top: 0; }
.source-content h3 { font-size: 20px; line-height: 28px; margin: 24px 0 12px; scroll-margin-top: 96px; }
.source-content h4 { font-size: 18px; line-height: 28px; margin: 20px 0 12px; scroll-margin-top: 96px; }
.source-content p { margin-bottom: 16px; }
.source-content strong { font-weight: 600; color: var(--ink); }
.source-content a, .source-faq a, .source-related a { color: var(--blue); text-decoration: underline; text-underline-offset: 3px; }
.source-content ul, .source-content ol { margin: 16px 0 24px; padding-left: 24px; }
.source-content li { margin-bottom: 8px; }
.source-content blockquote { margin: 24px 0; padding-left: 16px; border-left: 4px solid #d1d5db; color: #4b5563; font-style: italic; }
.source-content blockquote.affiliate-disclosure { margin: 0 0 24px; padding: 12px 16px; border: 1px solid var(--line); border-radius: 6px; background: #f9fafb; color: #4b5563; font-size: 14px; line-height: 20px; font-style: normal; }
.source-content blockquote.affiliate-disclosure p { margin: 0; }
.source-content img { height: auto; border-radius: 8px; }
.source-content pre { background: #f9fafb; color: #374151; border: 1px solid var(--line); border-radius: 8px; padding: 24px; overflow: auto; margin: 24px 0; font-size: 16px; line-height: 26px; tab-size: 4; }
.source-content code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.source-content :not(pre) > code { padding: 2px 4px; background: #f3f4f6; border-radius: 4px; font-size: .875em; color: #111827; }
.article-table { max-width: 100%; overflow-x: auto; margin: 24px 0; }
.article-table table { width: 100%; border-collapse: collapse; font-size: 14px; line-height: 22px; }
.article-table th, .article-table td { padding: 12px; text-align: left; border: 1px solid var(--line); }
.article-table th { background: #f3f4f6; font-weight: 600; }
.article-sidebar { position: sticky; top: 96px; max-height: calc(100vh - 112px); overflow: auto; padding-right: 8px; }
.article-nav { font-size: 14px; line-height: 20px; }
.article-nav > span { display: block; font-weight: 600; color: var(--ink); margin-bottom: 12px; }
.article-nav > div { border-left: 1px solid var(--line); }
.article-nav a { display: block; border-left: 2px solid transparent; margin-left: -1px; padding: 4px 0 4px 12px; color: #6b7280; }
.article-nav a.active { border-left-color: #171717; color: #171717; font-weight: 500; }
.article-nav a:hover { border-left-color: #d1d5db; color: var(--ink); }
.article-mobile-nav { display: none; margin-bottom: 24px; border: 1px solid var(--line); background: #fff; padding: 16px; border-radius: 8px; }
.article-mobile-nav summary { font-weight: 600; }
.article-mobile-nav nav { margin-top: 12px; }
.article-mobile-nav a { display: block; margin-bottom: 8px; font-size: 14px; line-height: 20px; }
.article-faq-section, .article-related-section { padding: 48px 0; background: #fff; border-top: 1px solid var(--line); }
.source-faq > h2, .source-related > h2 { font-size: 30px; line-height: 36px; margin-bottom: 32px; scroll-margin-top: 96px; }
.article-faq-item { background: var(--paper); border: 1px solid var(--line); border-radius: 8px; box-shadow: 0 1px 2px #0000000d; overflow: hidden; margin-bottom: 16px; }
.article-faq-item:last-child { margin-bottom: 0; }
.article-faq-item summary { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 16px 24px; list-style: none; }
.article-faq-item summary::-webkit-details-marker { display: none; }
.article-faq-item h3 { font-size: 18px; line-height: 28px; font-weight: 600; margin: 0; }
.article-faq-item summary > span { color: #6b7280; font-size: 22px; }
.article-faq-item[open] summary > span { transform: rotate(180deg); }
.article-faq-answer { padding: 0 24px 16px; color: #374151; line-height: 26px; }
.article-faq-answer p + p { margin-top: 16px; }
.source-related h3 { font-size: 24px; line-height: 32px; margin: 24px 0; }
.source-related ul { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); list-style: none; padding: 0; gap: 24px; }
.source-related li { background: var(--paper); padding: 24px; border: 1px solid var(--line); border-radius: 8px; }
.section { padding: 64px 0; }
.prose-layout { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 40px; }
.prose, .side-note, .form, .contact-card { background: #fff; padding: 32px; border: 1px solid var(--line); border-radius: 8px; }
.inner-hero h1, .prose h2, .prose h3 { overflow-wrap: anywhere; }
.prose h2 { font-size: 28px; margin: 32px 0 16px; }
.prose > h2:first-of-type { margin-top: 0; }
.prose p { color: #374151; margin-bottom: 16px; line-height: 26px; }
.side-note { align-self: start; }
.side-note h3 { font-size: 20px; margin-bottom: 16px; }
.side-note p { color: var(--muted); }
.text-link { color: var(--blue); font-weight: 600; display: inline-flex; gap: 8px; }
.value-grid { display: grid; gap: 24px; margin: 32px 0; }
.value-number, .label, .legal-date { color: #6b7280; font-size: 14px; display: block; margin-bottom: 12px; }
.value-card h3 { margin-bottom: 12px; }
.about-hero { padding: 80px 0; }
.about-hero h1, .contact-hero h1 { margin-bottom: 24px; }
.about-section { padding: 80px 0; background: #fff; }
.about-values-section { background: #f9fafb; }
.about-card-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 32px; }
.about-value-card { min-width: 0; padding: 32px; border: 1px solid var(--line); border-radius: 12px; background: #fff; box-shadow: 0 1px 2px #0000000d; display: flex; flex-direction: column; align-items: center; text-align: center; }
.about-card-icon { width: 64px; height: 64px; display: grid; place-items: center; margin-bottom: 24px; color: #171717; }
.about-card-icon svg { width: 28px; height: 28px; }
.about-value-card h3 { font-size: 20px; line-height: 28px; font-weight: 600; margin-bottom: 16px; }
.about-value-card p { color: var(--muted); line-height: 24px; margin-bottom: 24px; }
.about-card-link { display: inline-flex; align-items: center; gap: 6px; margin-top: auto; border-radius: 8px; padding: 8px 16px; color: var(--blue); background: #eff6ff; font-weight: 600; }
.about-card-link:hover { background: #dbeafe; }
.about-story-section { background: #fff; }
.about-story { max-width: 896px; }
.about-story h2 { font-size: 30px; line-height: 36px; margin-bottom: 24px; }
.about-story p { margin-bottom: 16px; color: #374151; line-height: 26px; }
.about-cta { margin: 0; }
.contact-hero { padding: 80px 0; }
.contact-section { background: #fff; padding: 64px 0; }
.contact-stack { width: 100%; max-width: 672px; margin: 0 auto; }
.contact-block { margin-bottom: 32px; }
.contact-block h3 { font-size: 20px; line-height: 28px; font-weight: 600; margin-bottom: 16px; }
.contact-detail { display: flex; align-items: flex-start; gap: 16px; }
.contact-icon { width: 36px; height: 36px; flex: 0 0 auto; display: grid; place-items: center; color: var(--blue); background: #eff6ff; border-radius: 8px; }
.contact-icon svg { width: 20px; height: 20px; }
.contact-label { color: #374151; font-weight: 500; margin-bottom: 4px; }
.contact-response { background: #f9fafb; border-radius: 8px; padding: 24px; color: #4b5563; }
.faq-section { background: #f9fafb; }
.contact-card { margin-bottom: 24px; }
.contact-card strong { display: block; font-size: 20px; margin-bottom: 12px; }
.field { display: grid; gap: 8px; margin-bottom: 24px; }
.field input, .field textarea { width: 100%; padding: 12px; border: 1px solid #d1d5db; border-radius: 8px; }
.field textarea { min-height: 160px; resize: vertical; }
.template-box { white-space: pre-wrap; padding: 24px; background: #f3f4f6; border-radius: 8px; margin: 24px 0; }
.template-actions { display: flex; flex-wrap: wrap; gap: 16px; }
.faq-list { max-width: 832px; margin: 0 auto; }
.faq-item { border: 1px solid var(--line); border-radius: 8px; margin-bottom: 32px; padding: 32px; background: #fff; box-shadow: 0 1px 2px #0000000d; }
.faq-question { width: 100%; border: 0; background: #fff; padding: 20px 24px; text-align: left; font-weight: 600; display: flex; justify-content: space-between; gap: 16px; }
.faq-item-heading { margin: 0; font-size: inherit; }
.faq-item h3 { font-size: 20px; line-height: 28px; font-weight: 600; margin: 0 0 16px; }
.faq-answer { display: block; color: #4b5563; line-height: 26px; }
.faq-item.open .faq-answer { display: block; }
.use-cases-section { padding-top: 24px; }
.use-case-grid { max-width: 1088px; margin: 0 auto; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; align-items: stretch; }
.use-case-card { min-width: 0; min-height: 400px; padding: 20px; background: #fff; border: 1px solid var(--line); border-radius: 12px; display: flex; flex-direction: column; color: var(--ink); text-decoration: none; box-shadow: 0 1px 2px #0000000d; transition: box-shadow .15s, transform .15s; }
.use-case-card:hover { box-shadow: 0 8px 16px #00000012; transform: translateY(-2px); }
.use-case-featured { border-color: #fbbf24; box-shadow: inset 0 0 0 1px #fef3c7; }
.use-case-label { display: block; color: #9ca3af; font-size: 11px; line-height: 16px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; margin-bottom: 8px; }
.case-badges { display: flex; flex-wrap: wrap; gap: 6px; min-height: 22px; margin-bottom: 10px; }
.case-badge { display: inline-flex; align-items: center; border-radius: 999px; padding: 3px 9px; font-size: 10px; line-height: 14px; font-weight: 700; text-transform: uppercase; letter-spacing: .02em; }
.case-featured { background: #fef3c7; color: #92400e; }
.case-level-beginner { background: #dcfce7; color: #166534; }
.case-level-intermediate { background: #fef3c7; color: #92400e; }
.case-level-advanced { background: #fee2e2; color: #991b1b; }
.case-platform { background: #dbeafe; color: #1d4ed8; }
.use-case-card h3 { font-size: 18px; line-height: 25px; margin: 0 0 8px; }
.case-summary { color: #4b5563; font-size: 14px; line-height: 21px; margin: 0 0 14px; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.case-note { color: #6b7280; font-size: 12px; line-height: 18px; border-left: 2px solid #d1d5db; padding-left: 12px; margin-bottom: 14px; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.case-tools { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin: 0 0 14px; }
.case-tool { border: 1px solid #e5e7eb; background: #f9fafb; border-radius: 6px; padding: 3px 8px; color: #374151; font-size: 11px; line-height: 16px; }
.case-more { color: #6b7280; font-size: 12px; }
.case-card-footer { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; margin-top: auto; padding-top: 12px; border-top: 1px solid #f3f4f6; color: #6b7280; font-size: 12px; line-height: 18px; }
.case-time { display: flex; gap: 6px; min-width: 0; }
.case-time > span { flex: 0 0 auto; }
.case-cta { flex: 0 0 auto; color: #2563eb; font-weight: 600; opacity: 0; transition: opacity .15s; }
.use-case-card:hover .case-cta { opacity: 1; }
.blog-card { padding: 32px; color: var(--ink); text-decoration: none; }
.blog-card:hover { box-shadow: 0 4px 8px #00000014; }
.blog-date { display: block; color: #6b7280; font-size: 14px; line-height: 20px; margin-bottom: 16px; }
.blog-card h2 { font-size: 24px; line-height: 32px; margin: 0 0 16px; font-weight: 700; }
.blog-card p { color: #4b5563; font-size: 16px; line-height: 24px; margin: 0 0 16px; max-width: 800px; }
.blog-read-more { color: #111827; font-size: 16px; line-height: 24px; font-weight: 500; }
.site-footer { color: #fff; background: #111827; }
.footer-main { padding: 48px 0 0; display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 32px; }
.site-footer .brand { color: #fff; }
.footer-brand-block p { max-width: 448px; margin-top: 16px; color: #d1d5db; line-height: 24px; }
.footer-label { color: #fff; font-size: 18px; line-height: 28px; font-weight: 600; margin-bottom: 16px; }
.footer-column > a { display: block; color: #d1d5db; margin-bottom: 8px; }
.footer-column > a:hover { color: #fff; }
.footer-bottom { text-align: center; color: #9ca3af; font-size: 14px; line-height: 20px; margin-top: 32px; padding: 32px 0 48px; border-top: 1px solid #1f2937; }
.toast { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%); padding: 16px 24px; max-width: calc(100% - 32px); border-radius: 8px; color: #fff; background: #111827; z-index: 100; opacity: 0; pointer-events: none; }
.toast.show { opacity: 1; }
.modal-backdrop { position: fixed; inset: 0; z-index: 100; background: #0008; display: flex; align-items: center; justify-content: center; padding: 24px; }
.detail-modal { position: relative; max-width: 640px; max-height: 90vh; overflow: auto; background: #fff; padding: 40px; border-radius: 12px; }
.detail-modal h2 { margin-bottom: 16px; }
.detail-modal h3 { margin: 24px 0 12px; }
.modal-close { position: absolute; right: 12px; top: 12px; background: none; border: 0; font-size: 28px; }
.modal-open { overflow: hidden; }
@media (max-width: 1023px) {
  .container { padding: 0 24px; }
  .feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .catalog-grid, .featured-grid, .use-case-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .about-card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .article-layout { display: block; }
  .article-sidebar { display: none; }
  .article-mobile-nav { display: block; }
  .prose-layout { grid-template-columns: 1fr; }
  .main-nav { gap: 16px; }
  .article-hero-ai-tools .article-facts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .article-hero-ai-tools .article-fact { grid-column: auto; }
  .article-hero-ai-tools .article-facts[data-count="5"] .article-fact:nth-child(n+4),
  .article-hero-ai-tools .article-facts[data-count="4"] .article-fact:nth-child(4),
  .article-hero-ai-tools .article-facts[data-count="2"] .article-fact,
  .article-hero-ai-tools .article-facts[data-count="1"] .article-fact { grid-column: auto; }
}
@media (max-width: 767px) {
  .main-nav { display: none; }
  .header-actions { display: block; }
  .main-nav.open { display: flex; flex-direction: column; align-items: stretch; gap: 8px; position: absolute; top: 64px; left: 0; right: 0; background: #fff; padding: 16px; border-bottom: 1px solid var(--line); box-shadow: 0 2px 4px #0000000d; }
  .home-hero h1 { font-size: 36px; line-height: 40px; }
  .section-heading h2 { font-size: 30px; line-height: 36px; }
  .inner-hero h1, .article-hero h1 { font-size: 36px; line-height: 40px; }
  .article { padding: 32px; }
  .alphabet-section { display: none; }
  .toolbar { align-items: stretch; flex-direction: column; }
  .search-box { max-width: none; }
  .contact-grid, .benefit-grid, .footer-main { grid-template-columns: 1fr; }
  .about-card-grid { grid-template-columns: 1fr; }
  .source-related ul { grid-template-columns: 1fr; }
  .use-case-grid { grid-template-columns: 1fr; }
  .footer-main { gap: 32px; }
  .breadcrumbs { font-size: 12px; line-height: 16px; gap: 4px; }
  .breadcrumbs > :last-child { max-width: 150px; }
}
@media (max-width: 639px) {
  .container { padding: 0 16px; }
  .hero-actions { flex-direction: column; }
  .feature-grid, .catalog-grid, .featured-grid, .use-case-grid { grid-template-columns: 1fr; }
  .article-hero-ai-tools .article-facts,
  .article-hero-use-cases .article-facts { grid-template-columns: 1fr; }
  .article-hero-ai-tools .article-fact { grid-column: auto; }
  .article-hero-ai-tools .article-facts[data-count="5"] .article-fact:nth-child(n+4),
  .article-hero-ai-tools .article-facts[data-count="4"] .article-fact:nth-child(4),
  .article-hero-ai-tools .article-facts[data-count="2"] .article-fact,
  .article-hero-ai-tools .article-facts[data-count="1"] .article-fact { grid-column: auto; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}