/* =========================================================================
   Underlay AI -- marketing site layout styles (shared across pages)

   Links AFTER styles.css (which provides the tokens). Class-based layout for
   the recreation only; component internals use inline styles via the DS.
   ========================================================================= */

* { box-sizing: border-box; }
body { margin: 0; font-family: var(--font); font-size: 18px; line-height: 1.7; color: var(--ink); background: var(--bg); -webkit-font-smoothing: antialiased; }
h1, h2, h3 { line-height: 1.2; font-weight: 600; color: var(--ink); }
a { color: var(--accent-dark); }
.uk-wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.uk-section { padding: 84px 0; }

/* header */
.uk-header { position: sticky; top: 0; z-index: 100; background: rgba(243,245,242,0.9); backdrop-filter: saturate(160%) blur(8px); border-bottom: 1px solid var(--line); }
.uk-header-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 14px 24px; }
.uk-brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); font-weight: 600; }
.uk-mark { border-radius: 9px; }
.uk-brand-name { font-family: var(--font-display); font-size: 21px; letter-spacing: -0.01em; }
.uk-nav { display: flex; align-items: center; gap: 6px; }
.uk-nav a { text-decoration: none; color: var(--ink-soft); font-size: 16px; font-weight: 500; padding: 8px 12px; border-radius: var(--radius-sm); text-transform: lowercase; cursor: pointer; }
.uk-nav a:hover { color: var(--ink); background: var(--surface-alt); }
.uk-nav a.is-current { color: var(--accent); }

/* hero */
.uk-hero { padding: 96px 0 72px; position: relative; }
.uk-hero::before { content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none; opacity: 0.045; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E"); }
.uk-hero-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 56px; align-items: center; position: relative; z-index: 1; }
.uk-hero-title { font-family: var(--font-display); font-weight: 600; text-transform: lowercase; font-size: clamp(34px,5.2vw,56px); line-height: 1.08; letter-spacing: -0.02em; margin: 0 0 20px; }
.uk-hero-title .accent { color: var(--accent); }
.uk-hero-lead { font-size: 21px; color: var(--ink-soft); margin: 0 0 28px; max-width: 38ch; }
.uk-hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 28px; }
.uk-chips { display: flex; flex-wrap: wrap; gap: 10px; }

/* hero art */
.uk-hero-art { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 26px; box-shadow: var(--shadow); }
.uk-chat-line { display: flex; gap: 10px; margin-bottom: 14px; align-items: flex-end; }
.uk-bubble { padding: 12px 16px; border-radius: 16px; font-size: 16px; line-height: 1.45; max-width: 80%; }
.from-customer .uk-bubble { background: var(--surface-alt); color: var(--ink); border-bottom-left-radius: 4px; }
.from-agent { justify-content: flex-end; }
.from-agent .uk-bubble { background: var(--accent); color: #fff; border-bottom-right-radius: 4px; }
.uk-art-tag { font-size: 13px; color: var(--ink-faint); margin: 18px 0 0; text-align: center; }

/* page intro (dedicated demo / structure pages) */
.uk-pagehead { padding-top: 30px; }
.uk-pagehead + .uk-section { padding-top: 28px; }
.uk-back { display: inline-flex; align-items: center; gap: 7px; font-size: 15px; font-weight: 600; color: var(--ink-soft); text-decoration: none; }
.uk-back:hover { color: var(--accent); }

/* closing CTA (dedicated pages) */
.uk-cta { background: var(--accent); color: #fff; padding: 60px 0; }
.uk-cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.uk-cta-copy { max-width: 46ch; }
.uk-cta-title { font-family: var(--font-display); font-weight: 600; text-transform: lowercase; font-size: clamp(26px,3.4vw,34px); letter-spacing: -0.015em; margin: 0 0 10px; color: #fff; }
.uk-cta-lead { margin: 0; font-size: 17px; line-height: 1.6; color: rgba(255,255,255,0.88); }
.uk-cta-actions { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }
.uk-cta-btn { display: inline-flex; align-items: center; justify-content: center; background: #fff; color: var(--accent-dark); font-weight: 600; font-size: 16px; padding: 14px 22px; border-radius: var(--radius); text-decoration: none; transition: transform var(--dur-fast) ease, background var(--dur-base) ease; }
.uk-cta-btn:hover { background: var(--surface-alt); }
.uk-cta-btn:active { transform: translateY(1px); }
.uk-cta-link { color: #fff; font-weight: 600; font-size: 16px; text-decoration: none; opacity: 0.9; }
.uk-cta-link:hover { opacity: 1; text-decoration: underline; }

/* services */
.uk-services { background: var(--surface-alt); }
.uk-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 40px; }
.uk-services-note { margin: 22px 0 0; text-align: left; font-size: 17px; color: var(--ink-soft); }
.uk-services-note:first-of-type { margin-top: 40px; }

/* demo */
.uk-demo-selector { display: flex; flex-wrap: wrap; gap: 10px; margin: 32px 0 0; }
.uk-demo-layout { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 64px; align-items: start; margin-top: 20px; }
.uk-device { background: var(--surface); border: 1px solid var(--line-strong); border-radius: var(--radius-lg); padding: 14px; box-shadow: var(--shadow); }
.uk-device-bar { display: flex; align-items: center; gap: 7px; padding: 4px 6px 12px; }
.uk-dot { width: 11px; height: 11px; border-radius: 50%; background: var(--line-strong); }
.uk-addr { margin-left: 10px; font-size: 13px; color: var(--ink-faint); background: var(--bg); padding: 5px 12px; border-radius: 999px; flex: 1; }
.uk-device-screen { border-radius: var(--radius); overflow: hidden; background: var(--bg); border: 1px solid var(--line); display: flex; flex-direction: column; }
.uk-demo-head { display: flex; align-items: center; gap: 11px; padding: 14px 18px; background: var(--accent); color: #fff; font-weight: 500; font-size: 15px; }
.uk-demo-mark { width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center; background: var(--surface); color: var(--accent); font-family: var(--font-display); font-weight: 600; flex: none; }
.uk-demo-sub { display: block; font-size: 12.5px; opacity: 0.75; font-weight: 400; }
.uk-thread { padding: 22px 18px; height: 440px; overflow-y: auto; display: flex; flex-direction: column; gap: 14px; background: var(--bg); }
.uk-msg { display: flex; max-width: 86%; }
.uk-msg--user { align-self: flex-end; }
.uk-msg--agent { align-self: flex-start; }
.uk-msg--customer { align-self: flex-end; }
.uk-msg-bubble { padding: 11px 15px; border-radius: 16px; font-size: 15px; line-height: 1.45; box-shadow: var(--shadow-soft); }
.uk-msg--agent .uk-msg-bubble { background: var(--surface); border: 1px solid var(--line); color: var(--ink); border-bottom-left-radius: 5px; }
.uk-msg--customer .uk-msg-bubble { background: var(--accent); color: #fff; border-bottom-right-radius: 5px; }
.uk-suggest { display: flex; flex-wrap: wrap; gap: 8px; padding: 14px 18px; border-top: 1px solid var(--line); background: var(--surface); }
.uk-suggest-chip { font-size: 14px; color: var(--accent-dark); background: var(--surface); border: 1px solid var(--line-strong); border-radius: 999px; padding: 7px 14px; }
/* live interactive demo embedded in the device frame */
.uk-demo-frame { width: 100%; height: 580px; border: 0; display: block; background: var(--bg); }
.uk-demo-help { margin: 14px 0 0; font-size: 14px; color: var(--ink-faint); text-align: center; }
.uk-demo-help a { color: var(--accent-dark); font-weight: 600; }

/* how */
.uk-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 44px; }

/* demo note */
.uk-demo-note { margin: 0; display: flex; flex-direction: column; gap: 16px; position: sticky; top: 90px; }
.uk-demo-note p { margin: 0; font-size: 16px; color: var(--ink-soft); line-height: 1.65; }
.uk-demo-note strong { color: var(--ink); }
.uk-demo-note p:last-child { margin-top: 40px; }

/* onboarding */
.uk-onboarding { background: var(--surface-alt); }
.uk-onboarding-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 52px; align-items: center; }
.uk-onboarding-copy p { font-size: 18px; color: var(--ink-soft); margin: 0 0 16px; }
.uk-onboarding-steps { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 14px; counter-reset: ob; }
.uk-onboarding-steps li { display: flex; gap: 16px; align-items: flex-start; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px; box-shadow: var(--shadow-soft); }
.uk-oc-ic { width: 40px; height: 40px; border-radius: 11px; background: var(--accent-soft); color: var(--accent); display: flex; align-items: center; justify-content: center; flex: 0 0 auto; }
.uk-onboarding-steps strong { display: block; font-size: 16px; color: var(--ink); margin-bottom: 4px; }
.uk-onboarding-steps span { font-size: 15px; color: var(--ink-soft); line-height: 1.55; }

/* structure */
.uk-structure-lead2 { font-family: var(--font-display); font-size: 22px; line-height: 1.5; color: var(--ink); max-width: 60ch; margin: 22px 0 0; }
.uk-structure-lead2 strong { color: var(--accent-dark); }
.uk-structure-ai-lead { font-size: 18px; color: var(--ink-soft); max-width: 62ch; margin: 16px 0 0; }
.uk-structure-grid { display: grid; grid-template-columns: 1.3fr 0.7fr; gap: 32px; margin-top: 44px; align-items: start; }
.uk-structure-points { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 14px; }
.uk-structure-points li { display: flex; gap: 12px; align-items: flex-start; font-size: 16.5px; color: var(--ink); }
.uk-sp-ic { color: var(--accent); flex: 0 0 auto; margin-top: 3px; }
.uk-structure-aside { background: var(--accent); color: #fff; border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow); }
.uk-structure-beyond { text-transform: lowercase; letter-spacing: 0.03em; font-size: 13px; font-weight: 700; color: rgba(255,255,255,0.7); margin: 0 0 10px; }
.uk-structure-aside p:last-child { margin: 0; font-size: 15.5px; line-height: 1.6; color: rgba(255,255,255,0.92); }
.uk-structure-custom { margin: 40px 0 0; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 28px; box-shadow: var(--shadow-soft); }
.uk-structure-custom p:last-child { margin: 0; font-size: 16.5px; color: var(--ink-soft); }
.uk-structure-shot { margin: 44px 0 0; }
.uk-structure-shot img { display: block; width: 100%; height: auto; border-radius: var(--radius); border: 1px solid var(--line-strong); box-shadow: var(--shadow); }
.uk-structure-shot figcaption { font-size: 14px; color: var(--ink-faint); margin-top: 12px; text-align: center; }
.uk-structure-shot-inline { margin-top: 32px; }
.uk-structure-block { margin-top: 60px; }
.uk-structure-subhead { font-family: var(--font-display); font-weight: 600; text-transform: lowercase; font-size: 28px; letter-spacing: -0.01em; margin: 0 0 26px; }
.uk-structure-features { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.uk-structure-feature { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow-soft); }
.uk-sf-num { font-family: var(--font-mono); font-size: 13px; color: var(--clay); font-weight: 600; }
.uk-structure-feature h4 { font-size: 18px; margin: 10px 0 8px; color: var(--ink); }
.uk-structure-feature p { margin: 0; font-size: 15.5px; color: var(--ink-soft); line-height: 1.55; }
.uk-structure-breakdown { margin: 0; }
.uk-structure-row { display: grid; grid-template-columns: 240px 1fr; gap: 24px; padding: 18px 0; border-top: 1px solid var(--line); }
.uk-structure-row dt { font-weight: 600; color: var(--ink); font-size: 17px; }
.uk-structure-row dd { margin: 0; color: var(--ink-soft); font-size: 16px; }
.uk-structure-callout { margin: 56px 0 0; border: 0; border-left: 3px solid var(--accent); padding: 6px 0 6px 24px; }
.uk-structure-callout-eyebrow { text-transform: lowercase; letter-spacing: 0.02em; font-size: 13px; font-weight: 600; color: var(--accent); margin: 0 0 10px; }
.uk-structure-callout-text { font-family: var(--font-display); font-size: 26px; line-height: 1.35; color: var(--ink); margin: 0; max-width: 26ch; }
.uk-roadmap-note { margin: 40px 0 0; font-size: 14px; color: var(--ink-faint); font-style: italic; }

/* contact fields */
.uk-field { margin-bottom: 18px; }
.uk-field label { display: block; font-size: 15px; font-weight: 600; margin-bottom: 7px; color: var(--ink); }
.uk-field input:focus, .uk-field textarea:focus { border-color: var(--accent) !important; background: var(--surface) !important; box-shadow: 0 0 0 3px var(--accent-soft); }

/* about */
.uk-about-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 52px; align-items: start; }
.uk-about-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow-soft); }
.uk-fact { display: flex; gap: 14px; margin-bottom: 18px; }
.uk-fact:last-child { margin-bottom: 0; }
.uk-fact-ic { width: 38px; height: 38px; border-radius: 10px; background: var(--accent-soft); color: var(--accent); display: flex; align-items: center; justify-content: center; flex: 0 0 auto; }
.uk-about-prose p { font-size: 18.5px; margin: 0 0 18px; color: var(--ink); }
.uk-eyebrow { text-transform: lowercase; letter-spacing: 0.02em; font-size: 13px; font-weight: 600; color: var(--accent); margin: 0 0 12px !important; }
.uk-section-title { font-family: var(--font-display); font-weight: 600; text-transform: lowercase; font-size: clamp(28px,4vw,40px); margin: 0 0 14px; letter-spacing: -0.015em; }
.uk-pull { font-family: var(--font-display); font-size: 22px !important; line-height: 1.45; color: var(--accent-dark); border-left: 3px solid var(--accent); padding-left: 20px; }

/* explore further (landing lead-in to demo / structure) */
.uk-explore { background: var(--accent-soft); }
.uk-explore-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; margin-top: 36px; }
.uk-explore-ic { width: 46px; height: 46px; border-radius: 12px; background: var(--accent-soft); color: var(--accent); display: flex; align-items: center; justify-content: center; }

/* contact */
.uk-contact { background: var(--surface-alt); }
.uk-contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.uk-email-line { font-size: 19px; margin: 22px 0 0; font-weight: 600; }
.uk-contact-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow-soft); }
.uk-contact--page { background: var(--bg); }

/* footer */
.uk-footer { background: var(--ink); color: var(--surface-alt); padding: 48px 0 40px; }
.uk-footer-inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 24px; align-items: center; }
.uk-footer-brand { display: flex; align-items: center; gap: 10px; font-weight: 600; font-size: 18px; color: #fff; font-family: var(--font-display); }
.uk-footer-meta { font-size: 14px; color: var(--line-strong); }

/* ---- ported design-system components (plain-HTML classes with real hover
   states; the React source did hover via JS). Mirror the component inline
   styles from components/core + components/layout. ---- */
.uk-btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; font: inherit; font-weight: 600; line-height: 1; border-radius: var(--radius); cursor: pointer; text-decoration: none; border: 1.5px solid transparent; transition: transform var(--dur-fast) ease, background var(--dur-base) ease, box-shadow var(--dur-base) ease, border-color var(--dur-base) ease, color var(--dur-base) ease; }
.uk-btn--md { font-size: 16px; padding: 14px 22px; }
.uk-btn--sm { font-size: 15px; padding: 11px 16px; }
.uk-btn--primary { background: var(--accent); color: var(--on-accent); box-shadow: var(--shadow-soft); }
.uk-btn--primary:hover { background: var(--accent-dark); }
.uk-btn--ghost { background: var(--surface); color: var(--ink); border-color: var(--line-strong); }
.uk-btn--ghost:hover { border-color: var(--accent); color: var(--accent-dark); }
.uk-btn:active { transform: translateY(1px); }

.uk-badge { display: inline-flex; align-items: center; font-size: 12px; font-weight: 600; letter-spacing: 0.02em; text-transform: lowercase; line-height: 1; white-space: nowrap; }
.uk-badge--tint { background: var(--accent-soft); color: var(--accent-ink); padding: 4px 10px; border-radius: var(--radius-pill); }
.uk-badge--solid { background: var(--accent); color: var(--on-accent); padding: 4px 10px; border-radius: var(--radius-pill); }
.uk-badge--meta { color: var(--accent); letter-spacing: 0.03em; text-transform: none; }

.uk-card { position: relative; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 26px; box-shadow: var(--shadow-soft); transition: transform var(--dur-base) ease, box-shadow var(--dur-base) ease; }
.uk-card--featured { border-color: var(--accent); box-shadow: var(--shadow); }
.uk-card--hover:hover { transform: translateY(-2px); box-shadow: var(--shadow); }

.uk-chip { display: inline-flex; align-items: center; gap: 8px; border-radius: var(--radius-pill); font-weight: 600; line-height: 1; cursor: pointer; padding: 11px 18px; font-size: 15px; border: 1.5px solid var(--line-strong); background: var(--surface); color: var(--ink-soft); transition: background var(--dur-base) ease, border-color var(--dur-base) ease, color var(--dur-base) ease, transform var(--dur-base) ease; }
.uk-chip:hover { border-color: var(--accent); color: var(--accent-dark); }
.uk-chip.is-active { background: var(--accent); color: var(--on-accent); border-color: var(--accent); }

.uk-sectionhead-lead { font-size: 19px; color: var(--ink-soft); max-width: 60ch; margin: 0; }

.uk-step-num { width: 44px; height: 44px; border-radius: 12px; background: var(--accent); color: var(--on-accent); font-weight: 700; font-size: 19px; display: flex; align-items: center; justify-content: center; margin-bottom: 16px; }
.uk-step h3 { font-size: 19px; margin: 0 0 8px; color: var(--ink); font-weight: 600; }
.uk-step p { margin: 0; font-size: 16px; color: var(--ink-soft); line-height: 1.6; }

.uk-feature { display: flex; gap: 10px; align-items: flex-start; font-size: 15.5px; color: var(--ink); margin-bottom: 9px; }
.uk-feature-ic { color: var(--accent); flex: 0 0 auto; margin-top: 3px; }

/* mobile nav toggle (usability enhancement; hidden on desktop so the design is unchanged there) */
.uk-nav-toggle { display: none; }
@media (max-width: 760px) {
  .uk-header-inner { position: relative; flex-wrap: wrap; }
  .uk-nav-toggle { display: inline-flex; align-items: center; gap: 8px; background: var(--surface); border: 1px solid var(--line-strong); border-radius: var(--radius-sm); padding: 9px 13px; font: inherit; font-size: 15px; font-weight: 600; color: var(--ink); cursor: pointer; }
  .uk-nav { position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 2px; background: var(--bg); border-bottom: 1px solid var(--line); padding: 10px 24px 16px; display: none; }
  .uk-nav.open { display: flex; }
  .uk-nav .uk-btn { justify-content: center; margin: 6px 0 0 0 !important; }
}

@media (max-width: 900px) {
  .uk-hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .uk-hero-art { order: -1; }
  .uk-cards { grid-template-columns: 1fr; }
  .uk-steps { grid-template-columns: repeat(2, 1fr); }
  .uk-about-grid, .uk-contact-grid, .uk-onboarding-inner, .uk-structure-grid, .uk-explore-grid, .uk-demo-layout { grid-template-columns: 1fr; gap: 32px; }
  .uk-demo-note { position: static; }
  .uk-demo-note p:last-child { margin-top: 16px; }
  .uk-structure-features { grid-template-columns: 1fr; }
  .uk-structure-row { grid-template-columns: 1fr; gap: 6px; }
}