/* Zenzo AI — About page. A chapter-based story that deliberately avoids the product/solutions page kit
   (no orange masthead, no section-header template, no cards, icons, badges or app mock-ups).
   Keeps the shared header, footer, Inter and the orange accent. Layout: founders-first hero → sticky chapter index + reading column → closing band. */
:root { --ab-paper: #FAF7F2; --ab-rail: 232px; }
.ab-wrap { max-width: var(--max-w); margin: 0 auto; padding: 0 var(--G); }
.ab-k { font-size: 12px; font-weight: 500; letter-spacing: .14em; text-transform: uppercase; color: var(--t3); }

/* ═══ HERO — the founders first, then the vision ═══ */
.ab-hero { padding: clamp(40px, 5vw, 72px) 0 clamp(64px, 7vw, 104px); }
.ab-hero-top { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: clamp(28px, 4vw, 64px); align-items: end; margin-top: 28px; }
.ab-pair { display: flex; gap: 16px; }
.ab-pair figure { width: clamp(150px, 19vw, 290px); }
.ab-pair .ph { aspect-ratio: 4 / 5; border-radius: 20px; overflow: hidden; background: var(--ab-paper); }
.ab-pair img { width: 100%; height: 100%; object-fit: cover; object-position: 50% 18%; display: block; }
.ab-pair figcaption { margin-top: 12px; font-size: 14px; line-height: 1.4; color: var(--t3); }
.ab-pair figcaption b { display: block; font-weight: 500; color: var(--t1); }
.ab-hero-note { max-width: 340px; padding-bottom: 46px; font-size: 16px; line-height: 1.6; color: var(--t2); }
.ab-hero-note a { display: inline-flex; align-items: center; gap: 8px; margin-top: 18px; font-size: 15px; color: var(--t1); border-bottom: 1px solid var(--t1); padding-bottom: 3px; }
.ab-hero-note a svg { width: 14px; height: 14px; transform: rotate(90deg); }
.ab-hero h1 { margin-top: clamp(40px, 5vw, 72px); max-width: 18ch; font-size: clamp(40px, 5.6vw, 88px); font-weight: 400; line-height: 1.02; letter-spacing: -.06em; color: var(--t1); }
.ab-hero h1 em { font-style: normal; color: var(--or); }

/* ═══ THE BOOK — sticky chapter index + reading column ═══ */
.ab-book { border-top: 1px solid var(--bdr); }
.ab-book-in { display: grid; grid-template-columns: var(--ab-rail) minmax(0, 1fr); gap: clamp(32px, 6vw, 120px); }
.ab-rail { position: sticky; top: calc(var(--nav-h, 72px) + 40px); align-self: start; padding-top: 72px; }
.ab-rail ol { list-style: none; margin-top: 18px; border-left: 1px solid var(--bdr); }
.ab-rail a { display: grid; grid-template-columns: 30px 1fr; padding: 8px 0 8px 18px; margin-left: -1px; border-left: 2px solid transparent; font-size: 14px; line-height: 1.35; color: var(--t3); transition: color .2s, border-color .2s; }
.ab-rail a span { font-variant-numeric: tabular-nums; color: var(--t4); }
.ab-rail a:hover { color: var(--t1); }
.ab-rail a.on { color: var(--t1); border-left-color: var(--or); }
.ab-rail a.on span { color: var(--or-dk); }
.ab-rail .sub a { padding-left: 48px; grid-template-columns: 1fr; font-size: 13px; }
.ab-chs { min-width: 0; }

/* A chapter */
.ab-ch { padding: 72px 0 80px; max-width: 760px; scroll-margin-top: calc(var(--nav-h, 72px) + 16px); }
.ab-ch + .ab-ch, .ab-name + .ab-ch { border-top: 1px solid var(--bdr-l); }
.ab-ch-k { font-size: 13px; color: var(--t3); }
.ab-ch-k b { font-weight: 500; color: var(--or-dk); margin-right: 10px; font-variant-numeric: tabular-nums; }
.ab-ch h2 { margin-top: 16px; font-size: clamp(32px, 3.4vw, 50px); font-weight: 400; line-height: 1.08; letter-spacing: -.05em; color: var(--t1); }
.ab-ch h2 em { font-style: normal; color: var(--t3); }
.ab-ch p { font-size: clamp(17px, 1.35vw, 19px); line-height: 1.7; color: var(--t2); }
.ab-ch h2 + p, .ab-ch .ab-by + p { margin-top: 22px; }
.ab-ch p + p { margin-top: 1em; }
.ab-ch p b { font-weight: 500; color: var(--t1); }
.ab-ch .lead { font-size: clamp(19px, 1.6vw, 22px); line-height: 1.55; color: var(--t1); }

/* Lines: a quiet list with hairlines, used across chapters instead of cards */
.ab-lines { list-style: none; margin-top: 30px; border-top: 1px solid var(--bdr); }
.ab-lines li { padding: 18px 0; border-bottom: 1px solid var(--bdr); font-size: clamp(16px, 1.3vw, 18px); line-height: 1.6; color: var(--t2); }
.ab-lines li b { font-weight: 500; color: var(--t1); }
.ab-lines.num { counter-reset: n; }
.ab-lines.num li { display: grid; grid-template-columns: 44px minmax(0, 1fr); counter-increment: n; }
.ab-lines.num li::before { content: counter(n, decimal-leading-zero); font-size: 13px; color: var(--t4); padding-top: 4px; }
.ab-lines.def li { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 20px; }
.ab-lines a { display: inline-flex; align-items: center; gap: 6px; color: var(--t1); border-bottom: 1px solid var(--bdr); }
.ab-lines a:hover { color: var(--or-dk); border-color: var(--or-dk); }
.ab-lines a svg { width: 13px; height: 13px; }
.ab-lines .ab-st { font-size: 13px; color: var(--t3); margin-left: 6px; }

/* 02 · before / after, set as type */
.ab-ba { margin-top: 40px; padding: 28px 0; border-top: 1px solid var(--bdr); border-bottom: 1px solid var(--bdr); }
.ab-ba .row { display: grid; grid-template-columns: 110px minmax(0, 1fr); gap: 16px; align-items: baseline; }
.ab-ba .row + .row { margin-top: 22px; }
.ab-ba .k { font-size: 12px; letter-spacing: .12em; text-transform: uppercase; color: var(--t3); }
.ab-ba .chain { font-size: clamp(16px, 1.4vw, 19px); line-height: 1.6; color: var(--t3); }
.ab-ba .chain i { font-style: normal; color: var(--t4); margin: 0 6px; }
.ab-ba .row.z .k { color: var(--or-dk); }
.ab-ba .row.z .chain { font-size: clamp(24px, 2.6vw, 36px); line-height: 1.2; letter-spacing: -.045em; color: var(--t1); }
.ab-ba .row.z .chain i { color: var(--or); }
.ab-ba .row.z .chain b { font-weight: 400; color: var(--or); }

/* 03 · byline + the three waits */
.ab-by { display: flex; align-items: center; gap: 12px; margin-top: 24px; font-size: 14px; color: var(--t3); }
.ab-by img { width: 44px; height: 44px; border-radius: 50%; object-fit: cover; object-position: 50% 18%; }
.ab-by b { display: block; font-weight: 500; color: var(--t1); }
.ab-ch p.ab-waits-cap { margin: 28px 0 0; font-size: 12px; line-height: 1.4; font-weight: 500; letter-spacing: .08em; text-transform: uppercase; color: var(--t3); }
.ab-waits-cap + .ab-waits { margin-top: 10px; }
.ab-waits { margin: 30px 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--bdr); border-bottom: 1px solid var(--bdr); }
.ab-waits div { padding: 20px 18px 20px 0; }
.ab-waits div + div { padding-left: 20px; border-left: 1px solid var(--bdr-l); }
.ab-waits b { display: block; font-size: clamp(28px, 2.8vw, 40px); font-weight: 400; line-height: 1; letter-spacing: -.05em; color: var(--t1); }
.ab-waits span { display: block; margin-top: 8px; font-size: 13px; color: var(--t3); }
.ab-h3 { margin-top: 44px; font-size: 12px; font-weight: 500; letter-spacing: .12em; text-transform: uppercase; color: var(--t3); }
.ab-h3 + .ab-lines { margin-top: 14px; }
.ab-voice { margin-top: 44px; }
.ab-voice .ab-by { margin: 0; }
.ab-voice .ab-h3 { margin-top: 22px; }
.ab-voice .ab-h3 + p { margin-top: 12px; }
.ab-close { margin-top: 40px; font-size: clamp(24px, 2.4vw, 34px) !important; line-height: 1.2 !important; letter-spacing: -.045em; color: var(--t1) !important; }
.ab-close em { font-style: normal; color: var(--t3); }

/* Interlude · the name (inside the reading column) */
.ab-name { margin: 8px 0 72px; border-radius: 26px; background: linear-gradient(135deg, var(--warm-dk) 0%, var(--warm-dk2) 100%); color: #fff; padding: clamp(36px, 4.5vw, 64px); position: relative; overflow: hidden; isolation: isolate; max-width: 760px; scroll-margin-top: calc(var(--nav-h, 72px) + 16px); }
.ab-name::before { content: ''; position: absolute; inset: 0; z-index: -1; background: radial-gradient(50% 70% at 90% 10%, rgba(249,115,22,.28), transparent 70%); }
.ab-name .ab-k { color: rgba(255,255,255,.55); }
.ab-name h2 { margin-top: 14px; font-size: clamp(64px, 7.5vw, 116px); font-weight: 500; line-height: .92; letter-spacing: -.07em; }
.ab-name h2 span { color: var(--or); }
.ab-name .pr { margin-top: 12px; font-size: 16px; color: rgba(255,255,255,.6); }
.ab-name .pr i { margin-left: 8px; }
.ab-name .kv { display: flex; flex-wrap: wrap; gap: 10px 28px; margin-top: 24px; font-size: 18px; color: rgba(255,255,255,.85); }
.ab-name .kv b { font-weight: 600; color: var(--or); margin-right: 8px; }
.ab-name p { margin-top: 22px; max-width: 620px; font-size: 17px; line-height: 1.7; color: rgba(255,255,255,.78); }
.ab-name p.lead { font-size: clamp(21px, 2vw, 27px); line-height: 1.3; letter-spacing: -.035em; color: #fff; }
.ab-name p.lead em { font-style: normal; color: rgba(255,255,255,.55); }
.ab-name p.sign { font-style: italic; color: #FDBA74; }

/* 05 · founders as two text columns (their portraits open the page) */
.ab-bios { margin-top: 34px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(24px, 4vw, 56px); }
.ab-bio { padding-top: 20px; border-top: 2px solid var(--t1); }
.ab-bio .who { display: flex; align-items: center; gap: 12px; }
.ab-bio .who img { width: 48px; height: 48px; border-radius: 50%; object-fit: cover; object-position: 50% 18%; }
.ab-bio h3 { font-size: 21px; font-weight: 500; line-height: 1.2; letter-spacing: -.035em; color: var(--t1); }
.ab-bio .role { font-size: 14px; color: var(--t3); }
.ab-bio .focus { margin-top: 16px; font-size: 14px; color: var(--t2); }
.ab-bio ul { list-style: none; margin-top: 14px; }
.ab-bio li { position: relative; padding: 9px 0 9px 18px; border-top: 1px solid var(--bdr-l); font-size: 15.5px; line-height: 1.55; color: var(--t2); }
.ab-bio li::before { content: '—'; position: absolute; left: 0; color: var(--t4); }
.ab-bio li b { font-weight: 500; color: var(--t1); }
.ab-bio .li { display: inline-flex; align-items: center; gap: 8px; margin-top: 14px; font-size: 14px; color: var(--t1); border-bottom: 1px solid var(--bdr); padding-bottom: 2px; }
.ab-bio .li svg { width: 15px; height: 15px; color: #0A66C2; }
.ab-bio .li:hover { border-color: var(--t1); }

/* ═══ CLOSING BAND ═══ */
.ab-end { background: var(--ab-paper); border-top: 1px solid var(--bdr); }
.ab-end-in { padding-top: clamp(72px, 9vw, 128px); padding-bottom: clamp(72px, 9vw, 128px); display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: clamp(32px, 6vw, 96px); align-items: end; }
.ab-end h2 { margin-top: 16px; font-size: clamp(36px, 4.4vw, 68px); font-weight: 400; line-height: 1.04; letter-spacing: -.06em; color: var(--t1); }
.ab-end h2 em { font-style: normal; color: var(--t3); }
.ab-end p { font-size: 17px; line-height: 1.65; color: var(--t2); max-width: 420px; }
.ab-end .btns { display: flex; flex-wrap: wrap; align-items: center; gap: 22px; margin-top: 26px; }
.ab-end .txt { font-size: 15px; color: var(--t1); border-bottom: 1px solid var(--t1); padding-bottom: 3px; }
.ab-end .txt:hover { color: var(--or-dk); border-color: var(--or-dk); }
.ab-end small { display: block; margin-top: 18px; font-size: 13px; color: var(--t3); }

/* ═══ Reveal (motion.js only knows the shared selectors) ═══ */
.mo .ab-rv { opacity: 0; transform: translateY(16px); transition: opacity .7s cubic-bezier(.2,.7,.2,1), transform .7s cubic-bezier(.2,.7,.2,1); transition-delay: var(--d, 0s); }
.mo .ab-rv.in { opacity: 1; transform: none; }

/* ═══ RESPONSIVE ═══ */
@media (max-width: 1080px) {
  .ab-hero-top { grid-template-columns: minmax(0, 1fr); align-items: start; }
  .ab-hero-note { padding-bottom: 0; }
  .ab-book-in { grid-template-columns: minmax(0, 1fr); gap: 0; }
  /* The index becomes a slim sticky bar under the header */
  .ab-rail { top: var(--nav-h, 64px); z-index: 20; padding: 10px 0; margin: 0 calc(-1 * var(--G)); padding-left: var(--G); padding-right: var(--G); background: rgba(255,255,255,.94); backdrop-filter: blur(8px); border-bottom: 1px solid var(--bdr); }
  .ab-rail .ab-k, .ab-rail ol { display: none; }
  .ab-mbar { display: flex !important; }
  .ab-end-in { grid-template-columns: minmax(0, 1fr); align-items: start; }
}
.ab-mbar { display: none; align-items: center; gap: 10px; font-size: 13.5px; color: var(--t2); }
.ab-mbar b { font-weight: 500; color: var(--or-dk); font-variant-numeric: tabular-nums; }
.ab-mbar .bar { flex: 1; height: 2px; background: var(--bdr); border-radius: 2px; overflow: hidden; }
.ab-mbar .bar i { display: block; height: 100%; width: var(--p, 14%); background: var(--or); transition: width .3s; }
@media (max-width: 768px) {
  .ab-pair { gap: 10px; }
  .ab-pair figure { width: calc(50% - 5px); }
  .ab-hero h1 { font-size: clamp(34px, 9.6vw, 48px); }
  .ab-ch { padding: 52px 0 56px; }
  .ab-ba .row { grid-template-columns: minmax(0, 1fr); gap: 6px; }
  .ab-waits { grid-template-columns: minmax(0, 1fr); }
  .ab-waits div, .ab-waits div + div { padding: 14px 0; border-left: 0; }
  .ab-waits div + div { border-top: 1px solid var(--bdr-l); }
  .ab-lines.def li { grid-template-columns: minmax(0, 1fr); gap: 4px; }
  .ab-name { margin-bottom: 52px; border-radius: 20px; }
  .ab-bios { grid-template-columns: minmax(0, 1fr); }
}