* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 110px; }
body { margin: 0; background: var(--brand-background); color: var(--brand-on-surface); font-family: var(--brand-font-body), sans-serif; line-height: 1.65; }
img { max-width: 100%; height: auto; }
a { color: var(--brand-link); text-underline-offset: 5px; }
a:focus-visible { outline: 3px solid var(--brand-link); outline-offset: 6px; border-radius: 4px; }
[hidden] { display: none !important; }
h1, h2, h3, .brand { font-family: var(--brand-font-display), sans-serif; }
h1, h2, h3, p { margin-top: 0; }
h1, h2 { letter-spacing: -.055em; line-height: 1.14; }
h1 { font-size: clamp(38px, 5.05vw, 70px); font-weight: 600; margin-bottom: 28px; }
h2 { font-size: clamp(32px, 3.5vw, 48px); font-weight: 600; margin-bottom: 24px; }
h3 { font-weight: 600; font-size: 22px; line-height: 1.3; letter-spacing: -.025em; }
.wrap, .header-inner, .site-footer { max-width: 1240px; margin-inline: auto; padding-inline: 42px; }
.skip-link { position: fixed; z-index: 10; top: 12px; left: 12px; padding: 12px 20px; background: white; transform: translateY(-150%); }
.skip-link:focus { transform: none; }
.site-header { position: sticky; top: 0; z-index: 5; background: var(--brand-background); border-bottom: 1px solid var(--brand-outline); }
.header-inner { min-height: 96px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; gap: 10px; align-items: center; color: var(--brand-on-surface); text-decoration: none; font-size: 23px; font-weight: 600; letter-spacing: -.035em; line-height: 1.2; }
.brand img { flex-shrink: 0; }
.site-header nav { display: flex; gap: 28px; }
.site-header nav a { color: var(--brand-on-surface); font-size: 14px; font-weight: 600; text-decoration: none; padding-block: 14px; }
.site-header nav a:hover, .site-footer nav a:hover { text-decoration: underline; }
.button { min-height: 56px; display: inline-flex; justify-content: center; align-items: center; gap: 26px; padding: 16px 25px; background: var(--brand-primary); color: var(--brand-on-primary); border: 1px solid #e6784e; border-radius: var(--brand-button-radius); box-shadow: 0 5px 0 #df754f; font-size: 15px; font-weight: 700; text-decoration: none; transition: transform .18s, box-shadow .18s; }
.button:hover { transform: translateY(-2px); box-shadow: 0 7px 0 #df754f; }
.button:active { transform: translateY(3px); box-shadow: 0 2px 0 #df754f; }
.text-link { font-size: 14px; font-weight: 700; text-decoration: none; display: inline-block; min-height: 48px; padding-block: 12px; }
.text-link:hover { text-decoration: underline; }
.eyebrow { font-size: 11px; font-weight: 700; letter-spacing: .16em; text-transform: uppercase; margin-bottom: 24px; }
.lead { font-size: 18px; line-height: 1.8; color: #625c6b; max-width: 480px; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 22px; margin-top: 32px; }
.chat-home { min-height: 600px; padding-block: 90px; display: grid; grid-template-columns: 1.2fr 1fr; align-items: center; gap: 60px; }
.chat-copy h1 { font-size: clamp(48px, 5.5vw, 76px); margin-bottom: 24px; }
.chat-copy .lead { max-width: 370px; margin-bottom: 0; }
.chat-illustration { width: 360px; justify-self: center; }
.site-footer { padding-top: 46px; padding-bottom: 28px; border-top: 1px solid var(--brand-outline); }
.footer-top { display: flex; justify-content: space-between; align-items: center; gap: 22px; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 20px; margin-top: 16px; }
.site-footer nav a { font-size: 12px; color: var(--brand-on-surface); text-decoration: none; min-height: 48px; padding-block: 12px; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; margin-top: 26px; padding-top: 20px; border-top: 1px solid var(--brand-outline); font-size: 10px; color: var(--brand-text-muted); }
.document-page { max-width: 1170px; margin-inline: auto; padding: 55px 42px 80px; }
.document-intro { max-width: 800px; }
.document-intro .eyebrow { margin-top: 30px; }
.document-intro h1 { font-size: clamp(36px, 5vw, 60px); margin-bottom: 18px; }
.updated { font-size: 12px; color: var(--brand-text-muted); }
.document-intro .lead { max-width: 770px; font-size: 17px; margin-bottom: 48px; }
.document-layout { display: grid; grid-template-columns: 230px 1fr; gap: 60px; }
.contents { position: sticky; top: 128px; align-self: start; display: grid; gap: 4px; padding: 20px; border: 1px solid var(--brand-outline); border-radius: 18px; font-size: 12px; background: #fffdf8; }
.contents strong { margin-bottom: 9px; }
.contents a { display: flex; align-items: center; min-height: 48px; padding-block: 8px; text-decoration: none; line-height: 1.5; }
.contents a:hover { text-decoration: underline; }
.document-body section { padding-bottom: 24px; margin-bottom: 28px; border-bottom: 1px solid var(--brand-outline); }
.document-body h2 { font-size: 22px; letter-spacing: -.02em; line-height: 1.5; margin-bottom: 16px; }
.document-body p, .document-body li { color: #625c6b; font-size: 15px; line-height: 1.85; }
.document-body li { margin-bottom: 12px; }
.document-body ul { padding-left: 24px; }
.contact-note { background: #e5f0e4; padding: 24px; border-radius: 20px; }
.contact-note p { margin-bottom: 12px; }
.support-page { display: grid; grid-template-columns: 1fr 1fr; gap: 90px; padding-top: 70px; padding-bottom: 90px; }
.support-intro > img { width: 120px; margin-bottom: 20px; }
.support-address { margin-top: 24px; font-size: 14px; }
.support-details { padding-top: 32px; }
.support-details article { padding-bottom: 25px; margin-bottom: 30px; border-bottom: 1px solid var(--brand-outline); }
.support-details h2 { font-size: 24px; letter-spacing: -.025em; }
.support-details p { font-size: 15px; color: var(--brand-text-muted); }
.support-links { display: flex; flex-wrap: wrap; gap: 22px; }
.link-page { max-width: 840px; text-align: center; padding-top: 35px; padding-bottom: 85px; min-height: 65vh; }
.link-page > img { width: 220px; }
.link-page h1 { font-size: clamp(34px, 4vw, 52px); }
.link-page .lead { margin-inline: auto; max-width: 590px; }
.link-page .actions { justify-content: center; margin-bottom: 25px; }
@media (max-width: 1000px) {
  .wrap, .header-inner, .site-footer { padding-inline: 28px; }
  .chat-home { gap: 30px; min-height: 540px; padding-block: 70px; }
  .chat-illustration { width: 300px; }
  .support-page { gap: 40px; }
  .document-layout { gap: 30px; grid-template-columns: 190px 1fr; }
}
@media (max-width: 700px) {
  html { scroll-padding-top: 85px; }
  .wrap, .header-inner, .site-footer { padding-inline: 22px; }
  .header-inner { min-height: 78px; gap: 12px; }
  .brand { font-size: 20px; }
  .brand img { width: 38px; height: 38px; }
  .chat-home { grid-template-columns: 1fr; gap: 32px; padding-block: 48px; min-height: auto; }
  .chat-copy h1 { font-size: clamp(46px, 10vw, 64px); }
  .chat-copy .lead { font-size: 16px; max-width: 340px; }
  .chat-illustration { width: 200px; }
  .eyebrow { font-size: 10px; }
  .actions { gap: 14px; }
  .actions .text-link { font-size: 12px; }
  .footer-top { flex-direction: column; align-items: flex-start; gap: 8px; }
  .site-footer nav { gap: 6px 20px; margin-top: 12px; }
  .footer-bottom { flex-direction: column; gap: 12px; margin-top: 16px; }
  .document-page { padding: 30px 22px 55px; }
  .document-layout { grid-template-columns: 1fr; gap: 35px; }
  .contents { position: static; display: flex; flex-wrap: wrap; gap: 6px 15px; }
  .contents strong { width: 100%; }
  .document-intro .lead { font-size: 16px; margin-bottom: 30px; }
  .document-body h2 { font-size: 21px; }
  .support-page { grid-template-columns: 1fr; gap: 18px; padding-top: 40px; padding-bottom: 45px; }
  .support-intro h1 { font-size: 52px; }
  .support-intro .lead { font-size: 16px; }
  .support-details { padding-top: 18px; }
  .link-page .actions { flex-direction: column; align-items: stretch; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button { transition: none; }
}