:root {
  --page: #f5f7fb;
  --paper: #ffffff;
  --wash: #eef3fb;
  --ink: #0d1726;
  --ink-soft: #4d5b6d;
  --line: #dbe2ec;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --accent-soft: #dbe7ff;
  --green: #0f766e;
  --dark: #0b1220;
  --radius: 16px;
  --container: 1160px;
  --shadow: 0 24px 60px rgba(13, 23, 38, 0.16);
  color-scheme: light;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; height: auto; }
a { color: var(--accent); }
h1, h2, h3 { line-height: 1.15; letter-spacing: -0.02em; margin: 0; }
p { margin: 0; }

.skip-link { position: absolute; left: 16px; top: -60px; z-index: 50; padding: 10px 14px; border-radius: 10px; background: var(--paper); color: var(--ink); }
.skip-link:focus { top: 12px; }
.shell { width: min(100%, var(--container)); margin-inline: auto; padding-inline: 20px; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 40; background: rgba(245, 247, 251, 0.86); backdrop-filter: saturate(1.4) blur(12px); border-bottom: 1px solid transparent; transition: border-color 0.2s; }
.site-header.is-scrolled { border-bottom-color: var(--line); }
.site-header .shell { display: flex; align-items: center; gap: 20px; min-height: 68px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-weight: 800; margin-right: auto; }
.brand img { width: 36px; height: 36px; border-radius: 10px; }
.brand span { line-height: 1.15; }
.brand small { display: block; color: var(--ink-soft); font-weight: 500; font-size: 0.78rem; }
.site-nav { display: flex; gap: 22px; font-size: 0.95rem; }
.site-nav a { color: var(--ink-soft); text-decoration: none; font-weight: 600; }
.site-nav a:hover { color: var(--ink); }
.lang { display: inline-flex; border: 1px solid var(--line); border-radius: 999px; padding: 3px; background: var(--paper); }
.lang a { padding: 4px 10px; border-radius: 999px; color: var(--ink-soft); font-size: 0.8rem; font-weight: 800; text-decoration: none; }
.lang a[aria-current="page"] { background: var(--ink); color: #fff; }

/* Buttons */
.button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 50px; padding: 0 22px; border-radius: 14px; font-weight: 800; text-decoration: none; border: 1px solid transparent; transition: transform 0.15s, background-color 0.15s, box-shadow 0.15s; }
.button:hover { transform: translateY(-1px); }
.button--primary { background: var(--accent); color: #fff; box-shadow: 0 10px 24px rgba(37, 99, 235, 0.28); }
.button--primary:hover { background: var(--accent-dark); }
.button--ghost { background: var(--paper); color: var(--ink); border-color: var(--line); }
.button--small { min-height: 40px; padding: 0 16px; font-size: 0.9rem; }

/* Phone frame around real UI screenshots (Roborazzi renders of the app, see tools/import-ai-screens.py) */
img.screen { width: 100%; max-width: 320px; aspect-ratio: 412 / 920; border: 9px solid #0f172a; border-radius: 36px; background: #f4f6fb; box-shadow: var(--shadow); }

/* Hero */
.hero { padding: 56px 0 72px; overflow: hidden; }
.hero .shell { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr); gap: 48px; align-items: center; }
.eyebrow, .label { color: var(--green); font-size: 0.78rem; font-weight: 800; letter-spacing: 0.09em; text-transform: uppercase; }
.hero h1 { margin-top: 14px; font-size: clamp(2.3rem, 5.2vw, 4rem); }
.hero__lede { margin-top: 20px; max-width: 580px; color: var(--ink-soft); font-size: 1.15rem; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.facts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin: 28px 0 0; max-width: 560px; }
.facts div { padding: 14px 16px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); }
.facts dt { font-weight: 800; }
.facts dd { margin: 4px 0 0; color: var(--ink-soft); font-size: 0.88rem; line-height: 1.45; }
.hero__visual { position: relative; min-height: 700px; }
.hero__visual .screen { position: absolute; width: min(290px, 60%); }
.hero__visual .screen--front { right: 4%; top: 0; z-index: 2; }
.hero__visual .screen--back { left: 2%; top: 64px; transform: rotate(-6deg); }
.hero__visual::before { content: ""; position: absolute; inset: 8% 0 0 8%; border-radius: 50%; background: radial-gradient(circle, rgba(37, 99, 235, 0.22), transparent 64%); }

/* Sections */
.section { padding: 84px 0; }
.section--paper { background: var(--paper); }
.section--dark { background: var(--dark); color: #e6edf7; }
.section--dark .label { color: #5eead4; }
.section--dark p { color: #b7c3d4; }
.intro { max-width: 760px; margin-bottom: 40px; }
.intro h2 { margin-top: 10px; font-size: clamp(1.8rem, 3.6vw, 2.6rem); }
.intro p { margin-top: 14px; color: var(--ink-soft); font-size: 1.06rem; }

/* Screens gallery */
.screens { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 28px; margin: 0; padding: 0; list-style: none; }
.screens figure { margin: 0; }
.screens figcaption { margin-top: 18px; }
.screens figcaption strong { display: block; font-size: 1.05rem; }
.screens figcaption span { display: block; margin-top: 6px; color: var(--ink-soft); font-size: 0.94rem; line-height: 1.5; }
.fine-print { margin-top: 28px; color: var(--ink-soft); font-size: 0.9rem; }

/* Features */
.features { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.feature { padding: 24px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); }
.feature h3 { font-size: 1.12rem; }
.feature p { margin-top: 8px; color: var(--ink-soft); font-size: 0.96rem; }
.tag { display: inline-block; margin-left: 6px; padding: 1px 8px; border-radius: 999px; background: var(--accent-soft); color: var(--accent-dark); font-size: 0.72rem; font-weight: 800; vertical-align: 2px; }

/* Models */
.models-layout { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); gap: 32px; align-items: start; }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); }
table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
caption { padding: 16px 18px 0; text-align: left; font-weight: 800; }
th, td { padding: 13px 18px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); }
thead th { color: var(--ink-soft); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.06em; }
tbody tr:last-child th, tbody tr:last-child td { border-bottom: 0; }
td.size { white-space: nowrap; font-weight: 800; }
.premium { margin-top: 18px; color: var(--ink-soft); font-size: 0.95rem; }

/* Model advisor (driven by assets/js/model-advisor.js) */
.advisor { padding: 24px; border-radius: var(--radius); background: var(--wash); border: 1px solid var(--line); }
.advisor h3 { font-size: 1.2rem; }
.advisor > p { margin-top: 6px; color: var(--ink-soft); font-size: 0.92rem; }
.advisor label { display: grid; gap: 6px; margin-top: 14px; font-weight: 700; font-size: 0.9rem; }
.advisor select { width: 100%; max-width: 100%; min-height: 44px; padding: 0 12px; border: 1px solid var(--line); border-radius: 12px; background: var(--paper); font: inherit; }
.advisor__result { margin: 18px 0 14px; padding: 16px; border-radius: 12px; background: var(--paper); }
.advisor__result h3 span { color: var(--ink-soft); font-size: 0.9rem; }
.advisor__result p { margin-top: 6px; color: var(--ink-soft); font-size: 0.92rem; }
.advisor__eyebrow { color: var(--green) !important; font-size: 0.75rem !important; font-weight: 800; text-transform: uppercase; letter-spacing: 0.08em; margin: 0 0 4px !important; }
.advisor__note { margin-top: 12px; color: var(--ink-soft); font-size: 0.85rem; }
.advisor .button { width: 100%; }

/* Examples */
.examples { margin-top: 40px; padding: 24px; border-radius: var(--radius); border: 1px solid var(--line); background: var(--paper); }
.examples__tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.examples__tabs button { min-height: 40px; padding: 0 16px; border: 1px solid var(--line); border-radius: 999px; background: var(--paper); font: inherit; font-weight: 700; cursor: pointer; }
.examples__tabs button[aria-selected="true"] { background: var(--ink); border-color: var(--ink); color: #fff; }
.examples__panel { margin-top: 16px; padding: 16px; border-radius: 12px; background: var(--wash); white-space: pre-line; }

/* Privacy boundary */
.boundary { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.boundary > div { padding: 26px; border-radius: var(--radius); background: rgba(255, 255, 255, 0.05); border: 1px solid rgba(255, 255, 255, 0.12); }
.boundary h3 { color: #fff; font-size: 1.15rem; }
.qr-play { display: flex; align-items: center; gap: 18px; max-width: 460px; margin-top: 18px; padding: 10px 14px 10px 10px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.qr-play img { flex: 0 0 auto; width: 168px; height: 168px; padding: 12px; background: #fff; border-radius: 10px; }
.qr-play p { color: var(--ink-soft); font-size: 0.9rem; line-height: 1.45; }
.table-wrap--dark { margin-top: 28px; background: rgba(255, 255, 255, 0.04); border-color: rgba(255, 255, 255, 0.12); }
.table-wrap--dark caption, .table-wrap--dark th { color: #fff; }
.table-wrap--dark th, .table-wrap--dark td { border-color: rgba(255, 255, 255, 0.1); }
.table-wrap--dark td { color: #c9d4e3; }
.table-wrap--dark td.win { color: #5eead4; font-weight: 700; }
.boundary ul { margin: 14px 0 0; padding-left: 20px; color: #c9d4e3; }
.boundary li { margin: 8px 0; }

/* Steps */
.steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; margin: 0; padding: 0; list-style: none; counter-reset: step; }
.steps li { padding: 24px; border-radius: var(--radius); background: var(--paper); border: 1px solid var(--line); counter-increment: step; }
.steps li::before { content: "0" counter(step); color: var(--accent); font-weight: 800; font-size: 0.85rem; }
.steps h3 { margin-top: 8px; font-size: 1.12rem; }
.steps p { margin-top: 8px; color: var(--ink-soft); font-size: 0.96rem; }

/* Guides */
.guide-cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.guide-card { display: block; padding: 22px; border-radius: var(--radius); border: 1px solid var(--line); background: var(--paper); color: var(--ink); text-decoration: none; transition: border-color 0.15s, transform 0.15s; }
.guide-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.guide-card strong { display: block; font-size: 1.04rem; }
.guide-card span { display: block; margin-top: 6px; color: var(--ink-soft); font-size: 0.93rem; }
.more { margin-top: 22px; font-weight: 700; }

/* FAQ */
.faq { max-width: 820px; }
.faq details { border-bottom: 1px solid var(--line); padding: 18px 0; }
.faq summary { cursor: pointer; font-weight: 800; font-size: 1.06rem; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--accent); font-size: 1.3rem; line-height: 1; }
.faq details[open] summary::after { content: "–"; }
.faq details p { margin-top: 10px; color: var(--ink-soft); }

/* CTA */
.cta { padding: 84px 0; text-align: center; background: linear-gradient(180deg, var(--page), var(--accent-soft)); }
.cta img { width: 72px; height: 72px; margin: 0 auto 18px; border-radius: 18px; box-shadow: 0 12px 28px rgba(13, 23, 38, 0.18); }
.cta h2 { font-size: clamp(1.8rem, 3.6vw, 2.6rem); }
.cta p { max-width: 620px; margin: 14px auto 0; color: var(--ink-soft); }
.cta .actions { justify-content: center; }

/* Generated full guide list (tools/link-guides.mjs) and footer */
section.guide-links h2 { font-size: 1.3rem; }
section.guide-links a { text-decoration: none; }
section.guide-links a:hover { text-decoration: underline; }
.site-footer { padding: 40px 0 56px; border-top: 1px solid var(--line); color: var(--ink-soft); font-size: 0.9rem; }
.site-footer .shell { display: grid; gap: 10px; }
.site-footer p { max-width: 860px; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 8px 18px; }
[data-legal-contact] { width: min(100%, var(--container)); margin: 0 auto; padding: 0 20px; }

/* Reveal on scroll (only when JS runs) */
.motion-ready [data-reveal] { opacity: 0; transform: translateY(14px); transition: opacity 0.5s ease, transform 0.5s ease; }
.motion-ready [data-reveal].is-visible { opacity: 1; transform: none; }

/* ---------- Guide and catalogue pages (main.article) ---------- */
main.article { width: min(100%, 820px); margin: 0 auto; padding: 24px 20px 72px; }
.article .section-shell, .article .section-shell--narrow { width: auto; margin: 0; padding: 0; }
.crumbs { margin: 8px 0 22px; color: var(--ink-soft); font-size: 0.88rem; }
.crumbs a { color: var(--ink-soft); }
.crumbs a:hover { color: var(--ink); }
.article h1 { margin: 12px 0 16px; font-size: clamp(2rem, 5vw, 3rem); }
.article h2 { margin: 52px 0 14px; font-size: clamp(1.4rem, 3.2vw, 1.85rem); }
.article h3 { margin: 28px 0 8px; font-size: 1.15rem; }
.article p { margin: 0 0 16px; }
.article ul, .article ol { margin: 0 0 18px; padding-left: 24px; }
.article li { margin: 8px 0; }
.article li > p { margin: 4px 0 0; color: var(--ink-soft); }
.article strong { color: var(--ink); }
.article code { overflow-wrap: anywhere; }
.article table { margin: 8px 0 24px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); overflow: hidden; }
.article th { background: var(--wash); }
.section__label { color: var(--green); font-size: 0.78rem; font-weight: 800; letter-spacing: 0.09em; text-transform: uppercase; margin: 0 0 6px !important; }
.lede, .post__lede, .guide-lede { color: var(--ink-soft); font-size: 1.18rem; line-height: 1.6; }
.byline, .post__meta { color: var(--ink-soft); font-size: 0.9rem; }
.post__head { margin-bottom: 8px; }
.actions, .hero__actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 24px 0 8px; }
.button.primary { background: var(--accent); color: #fff; box-shadow: 0 10px 24px rgba(37, 99, 235, 0.28); }
.button.primary:hover { background: var(--accent-dark); }
.button.secondary, .button--secondary, .button--quiet { background: var(--paper); color: var(--ink); border-color: var(--line); }
.article figure { margin: 40px auto; text-align: center; }
.article figure img.screen { margin: 0 auto; width: min(300px, 74vw); }
.article figure img:not(.screen) { margin: 0 auto; border-radius: var(--radius); }
.article figcaption { margin-top: 14px; color: var(--ink-soft); font-size: 0.9rem; }
.guide-hero, .guide-grid { display: grid; grid-template-columns: minmax(0, 1fr) 240px; gap: 40px; align-items: center; }
.guide-hero figure, .guide-grid figure { margin: 0; }
.guide-hero img.screen, .guide-grid img.screen { width: 100%; }
.guide-section, .editorial-addition, .related, .post-related, .sources { margin-top: 48px; }
.guide-section > h2:first-child, .guide-section > .section__label + h2, .editorial-addition > h2:first-child { margin-top: 0; }
.tip { margin: 24px 0; padding: 18px 20px; border-left: 4px solid var(--accent); border-radius: 12px; background: var(--wash); }
.tip p:last-child { margin: 0; }
.post__cta, .guide-cta { margin: 56px 0 0; padding: 32px; border-radius: 20px; background: linear-gradient(135deg, var(--wash), var(--accent-soft)); }
.post__cta h2, .guide-cta h2 { margin-top: 0; }
.guide-cta .section-shell { padding: 0; }
.related ul, .post-related ul { padding-left: 20px; }
.post-related__links, .related-links { display: grid; gap: 10px; }
.article .faq { max-width: none; margin-top: 56px; padding-top: 8px; border-top: 1px solid var(--line); }
.note { margin: 48px 0 0; padding: 20px 22px; border-radius: var(--radius); background: var(--wash); color: var(--ink-soft); font-size: 0.92rem; }
.note h2 { margin: 0 0 8px !important; font-size: 1.02rem !important; color: var(--ink); }
.article > .eyebrow + h1 { margin-top: 10px; }
.guide-list .guide-topic { margin-top: 20px; padding: 24px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); }
.guide-topic h2 { margin: 0 0 6px; font-size: 1.3rem; }
.guide-topic > p { color: var(--ink-soft); }
.guide-topic ul { list-style: none; padding: 0; margin: 0; }
.guide-topic li { padding: 12px 0; border-top: 1px solid var(--line); }
.guide-topic li a { font-weight: 800; text-decoration: none; }
.guide-topic li a:hover { text-decoration: underline; }
.guide-topic li span { color: var(--ink-soft); font-size: 0.93rem; }
.guide-topic li br { display: none; }
.guide-topic li span { display: block; margin-top: 2px; }
@media (max-width: 760px) {
  .guide-hero, .guide-grid { grid-template-columns: minmax(0, 1fr); }
  .guide-hero figure, .guide-grid figure { max-width: 260px; margin: 8px auto 0; }
  .post__cta, .guide-cta { padding: 24px 20px; }
  .article table { display: block; overflow-x: auto; font-size: 0.86rem; }
  .article th, .article td { padding: 9px 10px; }
}

@media (max-width: 1020px) {
  .site-header .shell { flex-wrap: wrap; row-gap: 0; }
  .site-nav { order: 10; gap: 4px 20px; overflow-x: auto; scrollbar-width: none; margin-inline: -20px; padding-inline: 20px; width: calc(100% + 40px); }
  .site-nav::-webkit-scrollbar { display: none; }
  .site-nav a { display: inline-flex; align-items: center; min-height: 44px; white-space: nowrap; }
  .qr-play { display: none; }
  .lang a { display: inline-flex; align-items: center; min-height: 36px; padding: 4px 12px; font-size: 0.875rem; }
  .faq details { padding: 8px 0; }
  .faq summary { padding: 10px 0; }
  .site-footer nav { gap: 0 18px; }
  .site-footer nav a { display: inline-flex; align-items: center; min-height: 44px; }
  .hero .shell, .models-layout { grid-template-columns: minmax(0, 1fr); }
  .hero__visual { min-height: 520px; max-width: 520px; width: 100%; margin: 0 auto; }
  .screens { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .features, .guide-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  body { font-size: 16px; }
  .site-header .button { display: none; }
  .brand small { display: none; }
  .hero { padding: 32px 0 48px; }
  .facts { grid-template-columns: 1fr; }
  .hero__visual { min-height: 440px; }
  .hero__visual .screen { width: 58%; }
  .section, .cta { padding: 60px 0; }
  .screens { display: flex; gap: 16px; overflow-x: auto; scroll-snap-type: x mandatory; padding-bottom: 8px; margin-inline: -20px; padding-inline: 20px; }
  .screens li { flex: 0 0 72%; scroll-snap-align: center; }
  .features, .guide-cards, .boundary, .steps { grid-template-columns: 1fr; }
  th, td { padding: 11px 12px; }
  .table-wrap table { min-width: 560px; }
  .site-header .shell { min-height: 60px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .motion-ready [data-reveal] { opacity: 1; transform: none; transition: none; }
  .button, .guide-card { transition: none; }
}