/* The Final HUM — beta design.
   Editorial "manual" look: off-white paper, ink type, mono labels, hairline rules.
   Mobile-first; layouts widen at 640 / 900 / 1180px. Colours are set as tokens below. */
:root{
  --bg:#FBFBFC; --paper:#FFFFFF; --ink:#111214; --body:#3C4046; --sub:#5F636A; --muted:#8A8E95;
  --line:#E3E5E8; --line-2:#C9CCD1; --hover:#55595F; --accent:#8A2F2E;
  --dark:#111214; --dark-line:#33363B; --dark-sub:#A2A6AD; --dark-btn:#55595F;
  --kaaba:#0A0A0B; --gold:#B9933F; --gold-2:#D4B26A;
  --f-ui:"Inter Tight","Helvetica Neue",Arial,sans-serif;
  --f-mono:"IBM Plex Mono",ui-monospace,monospace;
  --ease:cubic-bezier(.2,.7,.2,1);
  --gutter:20px; --pad-y:72px; --max:960px; --max-wide:1080px; --nav-h:64px;
  color-scheme:light;
}
@media (min-width:640px){:root{--gutter:32px;--pad-y:88px}}
@media (min-width:900px){:root{--gutter:56px;--pad-y:104px}}

*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + 16px);-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--f-ui);font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased;overflow-x:clip}
body.locked{overflow:hidden}
h1,h2,h3,p,blockquote,figure,ul{margin:0}
ul{padding:0;list-style:none}
img{max-width:100%}
a{color:inherit;text-decoration:none}
a:hover{color:var(--hover)}
button{font:inherit;color:inherit;background:none;border:0;padding:0;margin:0;text-align:left;cursor:pointer}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.skip{position:absolute;left:-9999px;top:8px;z-index:20;background:var(--ink);color:#fff;padding:8px 12px}
.skip:focus{left:8px}
.accent{color:var(--accent);font-weight:600}
.nowrap{white-space:nowrap}

/* ---------- Layout ---------- */
.sec{padding:var(--pad-y) var(--gutter);border-bottom:1px solid var(--line)}
.sec--paper{background:var(--paper)}
.sec--flush{padding-inline:0}
.wrap{max-width:var(--max);margin-inline:auto;display:flex;flex-direction:column;gap:28px}
.wrap--wide{max-width:var(--max-wide)}
.stack-s{display:flex;flex-direction:column;gap:20px}
.stack{display:flex;flex-direction:column;gap:24px}

/* ---------- Type ---------- */
.eyebrow{font-family:var(--f-mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--sub)}
.eyebrow--sm{font-size:11px}
.eyebrow-row{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
.mono{font-family:var(--f-mono)}
.rule{height:1px;background:var(--ink);transform-origin:left}
.h1{font-size:clamp(38px,8.4vw,64px);line-height:1.02;font-weight:500;letter-spacing:-.03em;text-wrap:balance}
.h2{font-size:clamp(30px,6.2vw,44px);line-height:1.1;font-weight:500;letter-spacing:-.025em;text-wrap:balance}
.lead{font-size:clamp(17px,2.4vw,20px);line-height:1.55;color:var(--body);max-width:720px;text-wrap:pretty}
.text{font-size:17px;line-height:1.65;color:var(--body);text-wrap:pretty}
.note{font-size:14px;line-height:1.55;color:var(--sub)}
.cite{font-family:var(--f-mono);font-size:12px;color:var(--sub)}

/* ---------- Buttons & chips ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;height:52px;padding:0 24px;font-size:15px;font-weight:500;border-radius:2px;border:1px solid transparent;white-space:nowrap;transition:background-color .25s,border-color .25s,color .25s}
.btn--primary{background:var(--ink);color:#fff;padding:0 28px}
.btn--primary:hover{background:#2A2C30;color:#fff}
.btn--outline{border-color:var(--line-2);color:var(--ink)}
.btn--outline:hover{border-color:var(--ink);color:var(--ink)}
.btn--light{background:#fff;color:var(--ink);padding:0 28px}
.btn--light:hover{background:#E9EAEC;color:var(--ink)}
.btn--ghost{border-color:var(--dark-btn);color:#fff}
.btn--ghost:hover{border-color:#fff;color:#fff}
.btn--sm{height:36px;padding:0 16px;font-size:13px}
.ctas{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.chips{display:flex;gap:8px;flex-wrap:wrap}
.chip{font-family:var(--f-mono);font-size:12px;padding:8px 12px;border:1px solid var(--line-2);border-radius:2px}

/* ---------- Header (logo · contents · order) ---------- */
.nav{position:sticky;top:0;z-index:10;background:var(--bg);border-bottom:1px solid var(--line);padding:0 var(--gutter)}
.nav__in{min-height:var(--nav-h);display:flex;align-items:center;justify-content:space-between;gap:16px;padding:10px 0}
.brand{display:flex;flex-direction:column;gap:3px;color:var(--ink);min-width:0}
.brand:hover{color:var(--ink)}
.brand__name{font-size:16px;font-weight:500;letter-spacing:-.01em;white-space:nowrap}
.brand__tag{font-size:12px;color:var(--sub);letter-spacing:.01em;display:none}
.brand__tag .accent{font-weight:500}
.nav__links{display:none}
.nav__links a{display:flex;align-items:baseline;gap:6px;padding:8px 0;font-size:14px;line-height:1.3;color:var(--muted);white-space:nowrap;border-bottom:1px solid transparent}
.nav__links a:hover{color:var(--ink)}
.nav__links a[aria-current="page"]{color:var(--ink);font-weight:500;border-bottom-color:var(--ink)}
.nav__num{font-family:var(--f-mono);font-size:11px}
.nav__end{display:flex;align-items:center;gap:8px;flex-shrink:0}
.nav__cta{display:none}
.burger{width:44px;height:44px;display:inline-flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;border:1px solid var(--line-2);border-radius:2px}
.burger span{display:block;width:18px;height:1.5px;background:var(--ink);transition:transform .3s var(--ease),opacity .2s}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}
.menu{position:fixed;top:var(--nav-h);right:0;bottom:0;z-index:9;width:min(360px,100%);background:var(--bg);border-left:1px solid var(--line);padding:24px var(--gutter) 32px;display:flex;flex-direction:column;gap:24px;overflow-y:auto;transform:translateX(100%);visibility:hidden;transition:transform .4s var(--ease),visibility 0s .4s}
.menu.open{transform:none;visibility:visible;transition:transform .4s var(--ease)}
.menu ul{display:flex;flex-direction:column}
.menu li a{display:flex;align-items:baseline;gap:12px;padding:14px 0;border-bottom:1px solid var(--line);font-size:17px;color:var(--ink)}
.menu li a[aria-current="page"]{font-weight:500}
.menu .nav__num{width:24px;color:var(--sub)}
.menu .btn{width:100%}
.menu-scrim{position:fixed;inset:var(--nav-h) 0 0 0;z-index:8;background:rgba(17,18,20,.32);opacity:0;visibility:hidden;transition:opacity .3s,visibility 0s .3s}
.menu-scrim.open{opacity:1;visibility:visible;transition:opacity .3s}
@media (min-width:640px){.brand__tag{display:block}.nav__cta{display:inline-flex}}
@media (min-width:1180px){
  .nav__links{display:flex;gap:22px;align-items:center}
  .burger,.menu,.menu-scrim{display:none}
}
@media (min-width:1360px){.nav__links{gap:28px}}

/* ---------- Home: hero ---------- */
.hero{padding:56px var(--gutter) 72px;border-bottom:1px solid var(--line)}
.hero__grid{max-width:var(--max-wide);margin-inline:auto;display:grid;gap:48px;align-items:center}
.hero__copy{display:flex;flex-direction:column;gap:28px;container-type:inline-size;min-width:0}
/* #6: "Human User Manual" stays on one line — sized to the column via container units. */
.hero__title{font-size:min(80px,11.4cqi);line-height:.98;font-weight:500;letter-spacing:-.035em}
.hero__title .line{display:block;white-space:nowrap}
.hero__lead{font-size:clamp(18px,2.6vw,22px);line-height:1.45;color:var(--body);max-width:560px;text-wrap:pretty}
.hero__sub{font-size:17px;line-height:1.5;color:var(--body)}
.hero__fig{display:flex;flex-direction:column;align-items:center;gap:20px}
.cover{position:relative;width:min(320px,72vw)}
.cover img{display:block;width:100%;height:auto}
.cover__real{position:absolute;inset:0;filter:drop-shadow(0 30px 40px rgba(17,18,20,.18)) drop-shadow(0 2px 4px rgba(17,18,20,.10))}
.callout{position:absolute;display:none;align-items:center;width:104px;font-family:var(--f-mono);font-size:10px;letter-spacing:.06em;text-transform:uppercase;white-space:nowrap}
.callout::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--ink);order:3;flex-shrink:0}
.callout i{flex:1;height:1px;background:var(--ink);margin:0 8px;order:2}
.callout b{font-weight:400;order:1}
.callout--l{left:-96px}
.callout--r{right:-104px;flex-direction:row-reverse}
.callout--r b{order:1}.callout--r i{order:2}.callout--r::before{order:3}
.fig-label{font-family:var(--f-mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--sub);display:flex;gap:24px}
@media (min-width:640px){.callout{display:flex}.hero__fig{padding:0 110px}}
@media (min-width:900px){
  .hero{padding:104px var(--gutter) 88px}
  .hero__grid{grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);gap:56px}
  .hero__fig{padding:0}
  .callout{display:none}
}
/* callouts need ~105px either side of the cover; only show them when the column has room */
@media (min-width:1180px){.hero__fig{padding:0 104px}.callout{display:flex}}

/* ---------- Quote ---------- */
.quote{font-size:clamp(22px,3.6vw,32px);line-height:1.45;letter-spacing:-.015em;text-wrap:pretty}
.link-mono{align-self:flex-start;font-family:var(--f-mono);font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--sub);text-decoration:underline;text-underline-offset:4px;text-decoration-color:var(--line-2)}

/* ---------- #5: feature cards (tick + title), two moving rows ---------- */
.feats{display:flex;flex-direction:column;gap:12px;overflow:hidden;margin-inline:calc(-1 * var(--gutter));padding-block:4px;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 6%,#000 94%,transparent);mask-image:linear-gradient(90deg,transparent,#000 6%,#000 94%,transparent)}
.feats__row{display:flex;gap:12px;width:max-content;animation:feats-l 46s linear infinite}
.feats__row--rev{animation-name:feats-r;animation-duration:52s}
.feats:hover .feats__row{animation-play-state:paused}
@keyframes feats-l{from{transform:translateX(0)}to{transform:translateX(calc(-50% - 6px))}}
@keyframes feats-r{from{transform:translateX(calc(-50% - 6px))}to{transform:translateX(0)}}
.feat{display:inline-flex;align-items:center;gap:12px;padding:14px 20px 14px 14px;background:var(--paper);border:1px solid var(--line);border-radius:2px;font-size:16px;font-weight:500;white-space:nowrap}
.feat--new{background:var(--ink);border-color:var(--ink);color:#fff}
.tick{width:24px;height:24px;flex-shrink:0;border-radius:50%;background:var(--accent);display:inline-flex;align-items:center;justify-content:center}
.tick svg{width:13px;height:13px;stroke:#fff;fill:none;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round}
.feat--new .tick{background:#fff}.feat--new .tick svg{stroke:var(--ink)}

/* ---------- Verse rail ---------- */
.sec-head{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;flex-wrap:wrap}
.rail-btns{display:flex;gap:8px}
.railbtn{width:44px;height:44px;border:1px solid var(--line-2);background:var(--bg);color:var(--ink);display:inline-flex;align-items:center;justify-content:center;font-size:18px;border-radius:2px;cursor:pointer}
.railbtn:hover{border-color:var(--ink)}
/* #7: cards are sized from the rail's own width (not the viewport), so both edges keep equal padding on 360px phones. */
.rail{display:flex;gap:16px;overflow-x:auto;scroll-snap-type:x mandatory;overscroll-behavior-x:contain;padding:4px 4px 20px;margin:0 -4px;scrollbar-width:thin;scrollbar-color:var(--line-2) transparent}
.rail>*{scroll-snap-align:start;flex:0 0 min(360px,calc(100% - 8px))}
@media (min-width:640px){.rail>*{flex-basis:min(360px,82%)}}
.vcard{background:var(--bg);border:1px solid var(--line);padding:28px 24px 24px;display:flex;flex-direction:column;gap:18px;min-height:300px}
.vcard__top{display:flex;justify-content:space-between;gap:12px;font-family:var(--f-mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--sub)}
.vcard__top b{font-weight:400;color:var(--ink)}
.vcard__text{font-size:17px;line-height:1.55;letter-spacing:-.005em;text-wrap:pretty;flex:1}
.vcard__ref{font-family:var(--f-mono);font-size:12px;color:var(--sub);padding-top:14px;border-top:1px solid var(--line)}
.rail-note{font-family:var(--f-mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--sub)}
@media (min-width:640px){.vcard{padding:28px 28px 24px}}

/* ---------- Chapter / media grids ---------- */
.grid-cells{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(260px,100%),1fr));gap:1px;background:var(--line);border:1px solid var(--line)}
.grid-cells--4{grid-template-columns:repeat(auto-fit,minmax(min(200px,100%),1fr))}
.grid-cells--2{grid-template-columns:repeat(auto-fit,minmax(min(380px,100%),1fr))}
.chap{background:var(--bg);min-height:200px;padding:28px;display:flex;flex-direction:column;justify-content:space-between;gap:24px;color:var(--ink);transition:background-color .25s}
.chap:hover{background:var(--paper);color:var(--ink)}
.chap__top{display:flex;justify-content:space-between;align-items:center;font-family:var(--f-mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--sub)}
.chap .arrow{font-size:16px;color:var(--ink);opacity:0;transform:translateX(-8px);transition:opacity .35s,transform .35s var(--ease)}
.chap:hover .arrow{opacity:1;transform:none}
.chap__title{font-size:22px;font-weight:500;line-height:1.15}
.chap__desc{font-size:14px;line-height:1.5;color:var(--sub)}
.chap__body{display:flex;flex-direction:column;gap:8px}
.mcard{background:var(--bg);padding:20px;display:flex;flex-direction:column;gap:16px;color:var(--ink);transition:background-color .25s}
.mcard:hover{background:var(--paper);color:var(--ink)}
.mcard img{aspect-ratio:16/9;width:100%;height:auto;object-fit:cover;display:block}
.mcard__title{font-size:18px;font-weight:500}
.mcard--lg{padding:clamp(16px,2.6vw,28px)}
.mcard--lg .mcard__title{font-size:22px;line-height:1.2}

/* ---------- Stats + fingerprint ---------- */
.stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(12px,3vw,40px)}
.stat{display:flex;flex-direction:column;gap:12px;padding-top:20px;border-top:1px solid var(--ink)}
.stat__n{font-size:clamp(24px,6.6vw,56px);font-weight:500;letter-spacing:-.03em;line-height:1;font-variant-numeric:tabular-nums}
.stat__l{font-size:clamp(13px,1.5vw,16px);line-height:1.4;color:var(--body)}
.figcard{border:1px solid var(--ink);background:var(--paper);padding:clamp(20px,3.5vw,40px);display:grid;grid-template-columns:clamp(72px,16vw,170px) minmax(0,1fr);gap:clamp(16px,4vw,48px);align-items:center;color:var(--ink)}
.figcard:hover{color:var(--ink)}
.figcard__body{display:flex;flex-direction:column;gap:18px;min-width:0}
.figcard__text{font-size:clamp(17px,2vw,22px);line-height:1.4;letter-spacing:-.01em;text-wrap:pretty}
.figcard__foot{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-family:var(--f-mono);font-size:12px;color:var(--sub)}
.figcard__foot b{font-weight:400;color:var(--ink)}
.fpwrap{position:relative;width:100%;max-width:180px;align-self:center}
.fpwrap img{display:block;width:100%;height:auto;filter:brightness(0)}
.fp-base{opacity:.12}
.fp-ink{position:absolute;inset:0}

/* ---------- Dark support band ---------- */
.band{background:var(--dark);color:#fff;border-bottom-color:var(--dark-line)}
.band .eyebrow{color:var(--dark-sub)}
.band .rule{background:#fff}
.band__title{font-size:clamp(32px,6.8vw,52px);line-height:1.04;font-weight:500;letter-spacing:-.03em;text-wrap:balance}
.counter{display:flex;flex-direction:column;gap:12px;padding:28px 0;border-top:1px solid var(--dark-line);border-bottom:1px solid var(--dark-line)}
.counter__n{font-family:var(--f-mono);font-size:clamp(30px,8.4vw,56px);letter-spacing:-.02em;line-height:1;font-weight:500;font-variant-numeric:tabular-nums}

/* ---------- #3: footer — like the book's back cover ---------- */
.foot{background:var(--kaaba);color:#fff;border-top:1px solid var(--gold);padding:64px var(--gutter) 40px}
.foot__in{max-width:var(--max);margin-inline:auto;display:flex;flex-direction:column;gap:48px}
.foot__top{display:flex;justify-content:space-between;align-items:flex-end;gap:32px;flex-wrap:wrap}
.foot__credit{display:flex;flex-direction:column;gap:6px}
.foot__kicker{font-size:13px;letter-spacing:.02em;color:#C9CCD1}
.foot__name{font-size:clamp(24px,4vw,32px);font-weight:600;letter-spacing:-.01em}
.foot__logo{display:inline-flex;color:var(--gold)}
.foot__logo:hover{color:var(--gold-2)}
.foot__logo svg{width:64px;height:auto;display:block;fill:currentColor}
.foot__bar{display:flex;justify-content:space-between;align-items:center;gap:24px 32px;flex-wrap:wrap;padding-top:32px;border-top:1px solid #26282C}
.apps{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.apps__label{font-family:var(--f-mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--dark-sub);margin-right:8px;flex-basis:100%}
.apps a{display:inline-flex;line-height:0}
.apps img{height:44px;width:auto;display:block}
.social{display:flex;gap:8px}
.social a{width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;border:1px solid #33363B;border-radius:2px;color:#C9CCD1;transition:border-color .25s,color .25s}
.social a:hover{border-color:var(--gold);color:var(--gold)}
.social svg{width:18px;height:18px;fill:currentColor}
@media (min-width:640px){.apps__label{flex-basis:auto}}

/* ---------- Chapter pages ---------- */
.page-head{padding:72px var(--gutter) 64px;border-bottom:1px solid var(--line)}
@media (min-width:900px){.page-head{padding:96px var(--gutter) 72px}}
.qa{border-bottom:1px solid var(--ink)}
.qa__item{border-top:1px solid var(--line)}
.qa__item:first-child{border-top-color:var(--ink)}
.qa__btn{width:100%;display:grid;grid-template-columns:36px minmax(0,1fr) 24px;gap:12px;padding:24px 0;align-items:start}
.qa__num{font-family:var(--f-mono);font-size:12px;color:var(--sub);padding-top:5px}
.qa__head{display:flex;flex-direction:column;gap:8px}
.qa__q{font-size:clamp(19px,3vw,24px);font-weight:500;line-height:1.2}
.qa__sum{font-size:16px;line-height:1.55;color:var(--sub)}
.qa__mark{font-family:var(--f-mono);font-size:20px;color:var(--sub);width:24px;height:24px;display:flex;align-items:center;justify-content:center;line-height:1;margin-top:2px;transition:transform .7s var(--ease),color .3s}
.qa__btn:hover .qa__mark{color:var(--ink)}
.qa__btn[aria-expanded="true"] .qa__mark{transform:rotate(45deg);color:var(--ink)}
.qa__panel{display:grid;grid-template-rows:0fr;opacity:0;transition:grid-template-rows .5s var(--ease),opacity .4s ease,visibility 0s .5s;visibility:hidden}
.qa__panel>div{overflow:hidden;min-height:0}
.qa__item.open .qa__panel{grid-template-rows:1fr;opacity:1;visibility:visible;transition:grid-template-rows .5s var(--ease),opacity .4s ease}
.qa__body{padding:0 0 32px 48px;display:flex;flex-direction:column;gap:16px;font-size:17px;line-height:1.65;color:var(--body)}
.qa__body ul{list-style:disc;padding-left:20px;display:flex;flex-direction:column;gap:8px}
@media (min-width:640px){.qa__btn{grid-template-columns:56px minmax(0,1fr) 32px;gap:16px;padding:28px 0}.qa__body{padding-left:72px;padding-right:48px}}
.spec{background:var(--bg);border:1px solid var(--line);padding:28px 24px;display:flex;flex-direction:column;gap:16px}
.spec__title{font-size:20px;font-weight:500;line-height:1.2}
.spec__text{font-size:15px;line-height:1.6;color:var(--body);text-wrap:pretty}
.boxquote{border:1px solid var(--ink);padding:clamp(24px,5vw,52px);display:flex;flex-direction:column;gap:20px;margin-top:24px}
.boxquote__text{font-size:clamp(24px,4.4vw,34px);line-height:1.35;letter-spacing:-.015em;text-wrap:pretty}
.pager{max-width:var(--max);margin-inline:auto;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1px;background:var(--line);border:1px solid var(--line)}
.pager a{background:var(--bg);padding:clamp(16px,2.4vw,28px);min-width:0;display:flex;flex-direction:column;gap:12px;color:var(--ink);transition:background-color .25s}
.pager a:hover{background:var(--paper);color:var(--ink)}
.pager a+a{text-align:right;align-items:flex-end}
.pager__t{font-size:clamp(15px,1.9vw,22px);font-weight:500;line-height:1.25}
.refrows{display:flex;flex-direction:column;font-size:16px}
.refrow{display:flex;justify-content:space-between;gap:24px;padding:14px 0;border-bottom:1px solid var(--line)}
.refrow:last-child{border-bottom-color:var(--ink)}
.refrow .mono{font-size:13px;color:var(--sub);white-space:nowrap}
.figbox{border:1px solid var(--ink);background:var(--bg);padding:clamp(24px,4vw,40px);display:flex;flex-direction:column;gap:24px}
.split{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(380px,100%),1fr));gap:56px;align-items:start}
.dl{display:flex;flex-direction:column;font-size:16px;border-top:1px solid var(--ink);border-bottom:1px solid var(--ink)}
.dl>div{display:grid;grid-template-columns:minmax(110px,1fr) 2fr;gap:20px;padding:14px 0;border-bottom:1px solid var(--line)}
.dl>div:last-child{border-bottom:0}
.dl dt{color:var(--sub)}.dl dd{margin:0}

/* ---------- Motion (CSS scroll-driven; no-ops where unsupported) ---------- */
@keyframes fadeUp{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}
@keyframes rise{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:none}}
@keyframes draw{from{transform:scaleX(0)}to{transform:scaleX(1)}}
@keyframes ink{from{clip-path:inset(0 0 100% 0)}to{clip-path:inset(0 0 0 0)}}
@keyframes land{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:none}}
@keyframes readin{from{color:#D6D8DC}to{color:var(--ink)}}
@keyframes unveil{from{opacity:0;filter:blur(8px);transform:translateY(6px)}to{opacity:1;filter:none;transform:none}}
@keyframes boxin{from{border-color:var(--line)}to{border-color:var(--ink)}}
@keyframes typein{from{clip-path:inset(0 100% 0 0)}to{clip-path:inset(0 0 0 0)}}
@keyframes realin{from{clip-path:inset(0 0 100% 0)}to{clip-path:inset(0 0 0 0)}}
@keyframes callfade{from{opacity:1}to{opacity:0}}
@keyframes drift{from{transform:translateY(0)}to{transform:translateY(60px)}}
.hero-in{animation:fadeUp .8s var(--ease) both}
.cover-in{animation:land 1s var(--ease) .2s both}
.rule-t{animation:draw .8s var(--ease) both}
@supports (animation-timeline:view()){
  .reveal{animation:rise linear both;animation-timeline:view();animation-range:entry 0% entry 35%}
  .rule{animation:draw linear both;animation-timeline:view();animation-range:entry 0% entry 60%}
  .row{animation:rise linear both;animation-timeline:view();animation-range:entry 0% entry 30%}
  .fp-ink{animation:ink linear both;animation-timeline:view();animation-range:entry 15% cover 60%}
  .read>span{animation:readin linear both;animation-timeline:view();animation-range:cover 10% cover 30%}
  .unveil>span{display:inline-block;animation:unveil linear both;animation-timeline:view();animation-range:entry 25% entry 70%}
  .unveil-box{animation:boxin linear both;animation-timeline:view();animation-range:entry 0% entry 50%}
  .ref{animation:typein linear both;animation-timeline:view();animation-range:entry 15% entry 55%}
  @media (min-width:900px){
    .cover__real{animation:realin linear both;animation-timeline:scroll();animation-range:40px 520px}
    .callout{animation:callfade linear both;animation-timeline:scroll();animation-range:0 360px}
    .cover-drift{animation:drift linear both;animation-timeline:scroll();animation-range:0 900px}
  }
}
@view-transition{navigation:auto}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  .feats{-webkit-mask-image:none;mask-image:none;margin-inline:0}
  .feats__row{width:auto;flex-wrap:wrap}
  .feats__row>[aria-hidden="true"]{display:none}
  .feat{white-space:normal}
}
/* #6: "Read a few lines before you read the book." on one line from tablet up */
@media (min-width:900px){.h2--line{font-size:min(44px,4.1vw);white-space:nowrap}}

/* ---------- #10: book details (icon · label · value, like a store listing) ---------- */
.bd{display:flex;flex-direction:column;gap:20px;padding:24px 0;border-top:1px solid var(--ink);border-bottom:1px solid var(--ink)}
.bd__title{font-size:22px;font-weight:600;letter-spacing:-.01em}
.bd__list{margin:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(min(200px,100%),1fr));gap:18px 24px}
.bd__item{display:grid;grid-template-columns:28px minmax(0,1fr);column-gap:12px;align-items:start}
.bd__ic{grid-row:1/3;width:24px;height:24px;margin-top:2px;fill:none;stroke:var(--ink);stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.bd__item dt{font-size:14px;color:var(--sub)}
.bd__item dd{margin:0;font-size:17px;font-weight:600;overflow-wrap:anywhere}
.bd__item dd.mono{font-size:15px;font-weight:500}