/* Public pages: the homepage and every server-rendered page (guides, apps, legal) share this file.
   Monochrome like the chat's Standard theme. One spacing rhythm, one left edge, colour only in the phone. */
:root {
  color-scheme: light;
  --bg: #fff; --tint: #f6f5f2; --nav: #f5f5f5; --panel2: #f7f7f7; --soft: #ededed;
  --line: #e6e4df; --line2: #c9c5bd; --text: #141414; --muted: #5d5d5a; --faint: #8a8984;
  --user: #f0f0f0; --dark: #121212; --content: 1120px; --radius: 16px; --section: 128px;
  --ease-out: cubic-bezier(.22,1,.36,1);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text); background: var(--bg);
}
* { box-sizing: border-box; letter-spacing: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 96px; }
body { margin: 0; font-size: 16px; line-height: 1.6; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
button, input, select, textarea { font: inherit; }
a { color: inherit; text-decoration: none; }
button, a, summary { -webkit-tap-highlight-color: transparent; touch-action: manipulation; }
button { cursor: pointer; }
[hidden] { display: none !important; }
:where(a,button,summary,select,[tabindex]):focus-visible { outline: 2px solid var(--text); outline-offset: 3px; border-radius: 6px; }
::selection { color: #fff; background: #262626; }
h1,h2,h3,p,figure { margin: 0; }
h1,h2,h3 { text-wrap: balance; }
p { text-wrap: pretty; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip-link { position: fixed; top: 10px; left: 10px; padding: 10px 16px; background: var(--text); color: #fff; z-index: 50; border-radius: 8px; transform: translateY(-150%); }
.skip-link:focus { transform: none; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 20; background: #fffffff2; border-bottom: 1px solid transparent; transition: border-color 240ms var(--ease-out); }
.site-header.is-scrolled, .page .site-header { border-color: var(--line); }
.header-inner, .footer-inner, .footer-bottom { width: min(calc(100% - 64px), var(--content)); margin: auto; }
.header-inner { height: 72px; display: flex; align-items: center; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-size: 18px; font-weight: 650; flex-shrink: 0; }
.brand .brand-mark { width: 26px; height: 26px; }
.site-nav { display: flex; gap: 4px; margin-left: 28px; }
.site-nav a { padding: 8px 12px; border-radius: 8px; font-size: 14px; font-weight: 500; color: var(--muted); transition: color 200ms var(--ease-out), background-color 200ms var(--ease-out); }
.site-nav a:hover { color: var(--text); }
.site-nav a[aria-current="page"] { color: var(--text); background: var(--nav); }
.header-actions { display: flex; align-items: center; gap: 18px; margin-left: auto; }
.text-action { font-size: 14px; font-weight: 500; color: var(--muted); transition: color 200ms var(--ease-out); }
.text-action:hover { color: var(--text); }
.mobile-menu { display: none; position: relative; }
.mobile-menu summary { list-style: none; display: grid; place-content: center; gap: 5px; width: 40px; height: 40px; border-radius: 8px; cursor: pointer; }
.mobile-menu summary::-webkit-details-marker { display: none; }
.mobile-menu summary span { display: block; width: 18px; height: 1.6px; background: var(--text); border-radius: 2px; transition: transform 240ms var(--ease-out); }
.mobile-menu[open] summary span:first-child { transform: translateY(3.3px) rotate(45deg); }
.mobile-menu[open] summary span:last-child { transform: translateY(-3.3px) rotate(-45deg); }
.mobile-menu nav { position: absolute; right: 0; top: calc(100% + 10px); display: grid; min-width: 220px; padding: 8px; background: #fff; border: 1px solid var(--line); border-radius: 14px; box-shadow: 0 18px 40px #00000014; }
.mobile-menu nav a { padding: 12px 14px; border-radius: 8px; font-size: 15px; font-weight: 500; }
.mobile-menu nav a:hover, .mobile-menu nav a[aria-current="page"] { background: var(--nav); }

/* Buttons and links */
.button { display: inline-flex; justify-content: center; align-items: center; gap: 10px; min-height: 48px; padding: 12px 24px; border: 1px solid var(--text); border-radius: 999px; color: #fff; background: var(--text); font-size: 15px; font-weight: 550; white-space: nowrap; transition: background-color 220ms var(--ease-out), border-color 220ms var(--ease-out), transform 220ms var(--ease-out); }
.button:hover { background: #2e2e2e; }
.button:active { transform: scale(.98); }
.button span { font-size: 16px; line-height: 1; transition: transform 320ms var(--ease-out); }
.button:hover span { transform: translate(2px,-2px); }
.button--compact { min-height: 40px; padding: 8px 16px; font-size: 14px; }
.button--secondary { background: transparent; color: var(--text); border-color: var(--line2); }
.button--secondary:hover { background: transparent; border-color: var(--text); }
.button--light { background: #fff; color: var(--text); border-color: #fff; }
.button--light:hover { background: #e9e9e9; border-color: #e9e9e9; }
.text-link { display: inline-flex; align-items: center; gap: 8px; font-size: 15px; font-weight: 550; border-bottom: 1px solid var(--line2); padding-bottom: 2px; transition: border-color 200ms var(--ease-out); }
.text-link span { transition: transform 320ms var(--ease-out); }
.text-link:hover { border-color: var(--text); }
.text-link:hover span { transform: translateX(3px); }
.text-link--light { color: #fff; border-color: #ffffff55; }
.text-link--light:hover { border-color: #fff; }

/* Hero: typography only */
.hero { padding: 120px 24px 128px; text-align: center; }
.hero-copy { max-width: 820px; margin: auto; }
.hero h1 { font-size: 15px; line-height: 1.3; font-weight: 600; color: var(--muted); margin-bottom: 20px; }
.hero-heading { font-size: 84px; line-height: 1; font-weight: 600; letter-spacing: -.04em; margin-bottom: 24px; }
.hero-lead { font-size: 20px; line-height: 1.55; color: var(--muted); max-width: 560px; margin: 0 auto; }
.hero-actions { display: flex; justify-content: center; align-items: center; gap: 12px; margin-top: 28px; flex-wrap: wrap; }
.hero-note { color: var(--faint); font-size: 13px; margin-top: 20px; }
/* A composer that types example requests; clicking it opens the chat. */
.hero-composer { display: flex; align-items: center; gap: 16px; width: min(100%, 620px); min-height: 68px; margin: 44px auto 0; padding: 12px 12px 12px 24px; border: 1px solid var(--line); border-radius: 22px; background: #fff; text-align: left; box-shadow: 0 1px 2px #0000000a, 0 18px 40px -24px #0000003d; transition: border-color 260ms var(--ease-out), box-shadow 360ms var(--ease-out), transform 360ms var(--ease-out); }
.hero-composer:hover { border-color: var(--line2); transform: translateY(-2px); box-shadow: 0 1px 2px #0000000a, 0 26px 50px -26px #00000052; }
.hero-composer-text { flex: 1; min-width: 0; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; font-size: 17px; color: var(--muted); }
.hero-caret { display: inline-block; width: 2px; height: 1.15em; margin-left: 2px; vertical-align: -0.18em; background: var(--text); animation: caret 1s steps(1) infinite; }
.hero-composer .send-symbol { display: grid; place-items: center; flex-shrink: 0; width: 42px; height: 42px; border-radius: 50%; background: var(--text); color: #fff; font-size: 20px; transition: transform 320ms var(--ease-out); }
.hero-composer:hover .send-symbol { transform: translateY(-2px); }
@keyframes caret { 50% { opacity: 0; } }
.hero h1,.hero-heading,.hero-lead,.hero-composer,.hero-actions,.hero-note { animation: arrive 900ms var(--ease-out) both; }
.hero-heading { animation-delay: 80ms; }.hero-lead { animation-delay: 160ms; }.hero-composer { animation-delay: 240ms; }.hero-actions { animation-delay: 320ms; }.hero-note { animation-delay: 400ms; }

/* Sections */
.section { padding: var(--section) max(32px,calc((100% - var(--content))/2)); }
.section + .section { border-top: 1px solid var(--line); }
.section-title { font-size: 40px; line-height: 1.1; font-weight: 600; letter-spacing: -.03em; margin-bottom: 56px; }
.kicker { display: inline-flex; align-items: center; gap: 10px; font-size: 13px; font-weight: 550; color: var(--muted); margin-bottom: 18px; }
.kicker::before { content: ""; width: 18px; height: 1.5px; background: currentColor; }
.line-icon { display: block; width: 24px; height: 24px; flex: none; }

/* What it can do: a quiet grid */
.features { border-top: 1px solid var(--line); }
.feature-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); column-gap: 56px; }
.feature { padding: 32px 0 40px; border-top: 1px solid var(--line); }
.feature .line-icon { width: 46px; height: 46px; padding: 11px; border-radius: 14px; background: var(--tint); color: var(--text); margin-bottom: 22px; transition: background-color 360ms var(--ease-out), color 360ms var(--ease-out), transform 360ms var(--ease-out); }
.feature:hover .line-icon { background: var(--text); color: #fff; transform: translateY(-3px); }
.feature h3 { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.feature p { color: var(--muted); font-size: 15px; line-height: 1.6; max-width: 300px; }

/* Apps band: the page's one picture */
.apps-band { background: var(--dark); color: #f4f4f4; overflow: hidden; }
.apps-band-inner { width: min(calc(100% - 64px), var(--content)); margin: auto; display: grid; grid-template-columns: minmax(0,1fr) minmax(0,.9fr); align-items: center; gap: 64px; padding: 112px 0 0; }
.apps-band .kicker { color: #a9a9a6; }
.apps-band h2 { font-size: 56px; line-height: 1.02; font-weight: 600; letter-spacing: -.035em; margin-bottom: 20px; }
.apps-band-copy > p:not(.kicker):not(.apps-band-note) { color: #c9c9c6; font-size: 18px; line-height: 1.6; max-width: 480px; }
.apps-band-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 24px; margin-top: 36px; }
.apps-band-note { color: #8f8f8b; font-size: 13px; margin-top: 18px; }
.apps-band-qr { display: flex; align-items: center; gap: 16px; margin: 40px 0 112px; padding-top: 24px; border-top: 1px solid #ffffff1f; max-width: 420px; }
.apps-band-qr img { width: 88px; height: 88px; border-radius: 10px; background: #fff; padding: 6px; }
.apps-band-qr figcaption { color: #a9a9a6; font-size: 13px; }
.apps-band-visual { align-self: end; display: flex; justify-content: center; }
.apps-band .phone { margin-bottom: -120px; }

/* Phone illustration (homepage and /apps) */
.phone { width: 300px; padding: 11px; border-radius: 46px; background: #0b0b0b; box-shadow: 0 0 0 1.5px #333, 0 40px 80px -20px #00000080; }
.phone-screen { height: 600px; border-radius: 36px; background: #fff; color: var(--text); display: flex; flex-direction: column; overflow: hidden; }
.phone-status { display: flex; justify-content: space-between; align-items: center; padding: 14px 24px 6px; font-size: 12px; font-weight: 600; }
.phone-status-icons { display: flex; gap: 4px; }
.phone-status-icons i { width: 14px; height: 9px; border-radius: 2px; background: var(--text); opacity: .85; }
.phone-status-icons i:first-child { width: 10px; }
.phone-bar { display: flex; align-items: center; justify-content: space-between; padding: 8px 16px 10px; font-size: 14px; font-weight: 600; }
.phone-menu { display: grid; gap: 4px; padding: 6px; }
.phone-menu i { display: block; width: 16px; height: 1.6px; background: var(--text); }
.phone-menu i:last-child { width: 11px; }
.phone-model span { color: var(--faint); font-size: 11px; }
.phone-new { font-size: 22px; font-weight: 300; line-height: 1; padding: 0 6px; }
.phone-chat { flex: 1; padding: 14px 14px 0; display: flex; flex-direction: column; }
.phone-question { align-self: flex-end; max-width: 82%; background: var(--user); border-radius: 18px; padding: 10px 14px; font-size: 13px; line-height: 1.45; }
.phone-answer { display: grid; grid-template-columns: 20px minmax(0,1fr); gap: 9px; margin-top: 18px; }
.phone-answer .brand-mark { width: 20px; height: 20px; margin-top: 2px; }
.phone-answer p { font-size: 13px; line-height: 1.55; margin-top: 10px; }
.phone-weather { padding: 10px 12px; border: 1px solid var(--line); border-radius: 14px; }
.phone-weather-city { font-size: 12px; font-weight: 600; margin-bottom: 8px; }
.phone-weather-days { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.phone-weather-days div { display: grid; justify-items: center; gap: 2px; padding: 6px 0; border-radius: 9px; background: var(--panel2); font-size: 11px; color: var(--muted); }
.phone-weather-days svg { width: 24px; height: 24px; }
.phone-weather-days strong { color: var(--text); font-size: 14px; }
.phone-weather-days small { font-size: 10px; }
.phone-composer { display: flex; align-items: center; gap: 8px; margin: 12px; padding: 8px 8px 8px 16px; border: 1px solid var(--line); border-radius: 22px; background: var(--panel2); font-size: 13px; color: var(--faint); }
.phone-composer > span:first-child { flex: 1; }
.phone-mic-icon { width: 18px; height: 18px; color: var(--muted); }
.phone-send { display: grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; background: var(--text); color: #fff; font-size: 15px; }

/* Questions (homepage and /apps) */
.faq { display: grid; grid-template-columns: minmax(0,1fr) minmax(0,2fr); gap: 56px; }
.faq .section-title { margin: 0; }
.faq-list { border-top: 1px solid var(--line); }
.app-faq { border-bottom: 1px solid var(--line); }
.app-faq summary { display: flex; justify-content: space-between; align-items: center; gap: 24px; padding: 24px 0; font-size: 18px; font-weight: 550; cursor: pointer; list-style: none; }
.app-faq summary::-webkit-details-marker { display: none; }
.app-faq summary::after { content: "+"; flex: none; font-size: 22px; font-weight: 300; line-height: 1; color: var(--muted); transition: transform 300ms var(--ease-out); }
.app-faq[open] summary::after { transform: rotate(45deg); }
.app-faq p { margin: -8px 0 24px; max-width: 640px; color: var(--muted); font-size: 16px; line-height: 1.7; }
.app-faq p a { color: var(--text); text-decoration: underline; text-underline-offset: 3px; }

/* Closing call to action */
.final-cta { padding: var(--section) 24px; border-top: 1px solid var(--line); text-align: center; }
.final-cta h2 { font-size: 48px; font-weight: 600; line-height: 1.08; letter-spacing: -.03em; margin-bottom: 36px; }

/* Footer */
.site-footer { border-top: 1px solid var(--line); background: var(--tint); }
.footer-inner { display: grid; grid-template-columns: minmax(0,1fr) minmax(0,2.4fr); gap: 48px; padding: 64px 0 48px; }
.footer-brand p { margin-top: 14px; color: var(--muted); font-size: 14px; max-width: 260px; }
.footer-columns { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 24px; }
.footer-column { display: grid; align-content: start; gap: 2px; }
.footer-column h2 { font-size: 13px; font-weight: 600; margin-bottom: 10px; }
.footer-column a { padding: 5px 0; font-size: 14px; color: var(--muted); transition: color 200ms var(--ease-out); }
.footer-column a:hover { color: var(--text); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; gap: 24px; padding: 20px 0 28px; border-top: 1px solid var(--line); font-size: 13px; color: var(--muted); }
.language-picker { display: inline-flex; align-items: center; gap: 10px; }
.language-picker select { padding: 6px 28px 6px 10px; border: 1px solid var(--line2); border-radius: 8px; background: #fff; color: var(--text); font-size: 13px; }
.language-links { display: flex; gap: 16px; }
.language-links a:hover { color: var(--text); }
.language-links a[aria-current="page"] { color: var(--text); font-weight: 600; }

/* Motion */
.reveal-pending { opacity: 0; transform: translateY(16px); }
.reveal-pending.reveal-in { opacity: 1; transform: none; transition: opacity 700ms var(--ease-out) var(--reveal-delay,0ms), transform 900ms var(--ease-out) var(--reveal-delay,0ms); }
/* The phone rises out of the dark band. */
.apps-band-visual.reveal-pending { opacity: 1; transform: translateY(120px); }
.apps-band-visual.reveal-pending.reveal-in { transform: none; transition: transform 1400ms var(--ease-out) 150ms; }
@keyframes arrive { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }

@media(max-width:980px) {
  :root { --section: 96px; }
  .site-nav { display: none; }
  .header-signin { display: none; }
  .mobile-menu { display: block; }
  .hero { padding: 96px 24px 104px; }
  .hero-heading { font-size: 64px; }
  .feature-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .apps-band-inner { grid-template-columns: 1fr; gap: 0; }
  .apps-band-qr { display: none; }
  .apps-band-copy { padding-bottom: 64px; }
  .faq { grid-template-columns: 1fr; gap: 32px; }
  .footer-inner { grid-template-columns: 1fr; gap: 36px; }
}
@media(max-width:640px) {
  :root { --section: 72px; }
  html { scroll-padding-top: 80px; }
  body { font-size: 15px; }
  .header-inner, .footer-inner, .footer-bottom, .apps-band-inner { width: calc(100% - 40px); }
  .header-inner { height: 64px; gap: 10px; }
  .header-actions { gap: 6px; }
  .brand { font-size: 17px; }
  .hero { padding: 72px 20px 80px; }
  .hero-heading { font-size: 46px; margin-bottom: 18px; }
  .hero-lead { font-size: 17px; }
  .hero-actions { flex-direction: column; align-items: stretch; max-width: 340px; margin: 20px auto 0; }
  .hero-composer { margin-top: 32px; min-height: 60px; padding-left: 18px; border-radius: 18px; }
  .hero-composer-text { font-size: 15px; }
  .hero-composer .send-symbol { width: 38px; height: 38px; }
  .feature .line-icon { width: 40px; height: 40px; padding: 9px; }
  .section { padding: var(--section) 20px; }
  .section-title, .final-cta h2 { font-size: 32px; }
  .section-title { margin-bottom: 32px; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature { padding: 24px 0 28px; display: grid; grid-template-columns: 40px minmax(0,1fr); column-gap: 16px; }
  .feature .line-icon { grid-row: span 2; margin: 0; }
  .feature h3 { font-size: 17px; margin-bottom: 4px; }
  .apps-band-inner { padding-top: 80px; }
  .apps-band h2 { font-size: 40px; }
  .apps-band-copy > p:not(.kicker):not(.apps-band-note) { font-size: 16px; }
  .phone { width: 270px; }
  .phone-screen { height: 540px; }
  .app-faq summary { font-size: 16px; padding: 20px 0; }
  .footer-columns { grid-template-columns: 1fr 1fr; gap: 28px 20px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; gap: 12px; }
}
@media(max-width:360px) { .hero-heading { font-size: 40px; } }
@media(prefers-reduced-motion:reduce) { html { scroll-behavior: auto; } *,*::before,*::after { animation: none !important; transition: none !important; } }