/* HORA case study. The colour tokens below are HORA's Figma Theme collection, same names as its web code syntax.
   Day / Night via [data-theme] on <html>. Instrument Serif (display) · Hanken Grotesk (UI) · Martian Mono (time). */
@font-face{font-family:"Instrument Serif";font-style:normal;font-weight:400;font-display:swap;src:url("assets/fonts/InstrumentSerif-normal-400.woff2") format("woff2")}
@font-face{font-family:"Instrument Serif";font-style:italic;font-weight:400;font-display:swap;src:url("assets/fonts/InstrumentSerif-italic-400.woff2") format("woff2")}
@font-face{font-family:"Hanken Grotesk";font-weight:400 600;font-display:swap;src:url("assets/fonts/HankenGrotesk-normal-400-600.woff2") format("woff2")}
@font-face{font-family:"Martian Mono";font-weight:400;font-display:swap;src:url("assets/fonts/MartianMono-normal-400.woff2") format("woff2")}
:root{
  --color-bg-page:#F3F2EE;--color-bg-surface:#FBFAF8;--color-bg-sunken:#E9E7E1;--color-bg-inverse:#15161A;
  --color-bg-tint-am:#FBE6D9;--color-bg-tint-pm:#E4E2F1;
  --color-text-primary:#15161A;--color-text-secondary:#46433E;--color-text-muted:#67635C;--color-text-inverse:#F3F2EE;
  --color-text-accent:#A9461F;--color-text-pm:#4B4391;--color-text-on-accent:#15161A;--color-text-inverse-muted:#B9B6AF;
  --color-border-default:#D9D6CE;--color-border-strong:#15161A;--color-border-focus:#4B4391;--color-border-inverse:#46433E;
  --color-action-primary:#15161A;--color-action-primary-hover:#46433E;--color-action-accent:#E07B4F;
  --color-accent-am:#E07B4F;--color-accent-pm:#4B4391;--color-status-success:#3F6F4F;
  --serif:"Instrument Serif",Georgia,serif;--sans:"Hanken Grotesk",system-ui,-apple-system,"Segoe UI",sans-serif;--mono:"Martian Mono",ui-monospace,Consolas,monospace;
  --radius-m:10px;--radius-l:20px;--pad:clamp(16px,5vw,64px);--ease:cubic-bezier(.16,1,.3,1);
  --shadow-raised:0 1px 2px rgba(21,22,26,.06),0 12px 32px -12px rgba(21,22,26,.18);
  color-scheme:light;
}
:root[data-theme="night"]{
  --color-bg-page:#0D0E12;--color-bg-surface:#16171D;--color-bg-sunken:#22232B;--color-bg-inverse:#F3F2EE;
  --color-bg-tint-am:#3B2116;--color-bg-tint-pm:#2A2557;
  --color-text-primary:#F3F2EE;--color-text-secondary:#B9B6AF;--color-text-muted:#8E8B85;--color-text-inverse:#15161A;
  --color-text-accent:#F2B08C;--color-text-pm:#A9A3D6;--color-text-on-accent:#15161A;--color-text-inverse-muted:#67635C;
  --color-border-default:#33343E;--color-border-strong:#F3F2EE;--color-border-focus:#A9A3D6;--color-border-inverse:#D9D6CE;
  --color-action-primary:#F3F2EE;--color-action-primary-hover:#D9D6CE;--color-action-accent:#F2B08C;
  --color-accent-am:#F2B08C;--color-accent-pm:#A9A3D6;--color-status-success:#8DBE9B;
  --shadow-raised:0 1px 2px rgba(0,0,0,.4),0 16px 40px -16px rgba(0,0,0,.7);
  color-scheme:dark;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{background:var(--color-bg-page);color:var(--color-text-primary);font:400 17px/1.6 var(--sans);overflow-x:hidden;transition:background-color .5s var(--ease),color .5s var(--ease)}
a{color:inherit}
img{display:block;max-width:100%;height:auto}
code{font:400 .82em var(--mono);color:var(--color-text-pm)}
.mono{font-family:var(--mono)}
em{font-style:italic;color:var(--color-text-accent)}
[hidden]{display:none!important}
.skip{position:absolute;left:-999px;top:10px;background:var(--color-action-primary);color:var(--color-text-inverse);padding:10px 14px;border-radius:999px;z-index:99}
.skip:focus{left:10px}
:focus-visible{outline:2px solid var(--color-border-focus);outline-offset:3px;border-radius:6px}
section[id]{scroll-margin-top:70px}

/* announcement + header */
.announce{background:#15161A;color:#F3F2EE;font-size:12.5px;text-align:center;padding:8px 16px;letter-spacing:.01em}
.announce .mono{font-size:11px;opacity:.85}
.top{position:sticky;top:0;z-index:40;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:16px;padding:12px var(--pad);background:color-mix(in srgb,var(--color-bg-page) 86%,transparent);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--color-border-default)}
.back{justify-self:start;text-decoration:none;font:500 14px var(--sans);color:var(--color-text-secondary);display:inline-flex;gap:8px;align-items:center}
.back span{transition:transform .3s var(--ease)}.back:hover span{transform:translateX(-4px)}
.logo{display:inline-flex;align-items:center;gap:8px;text-decoration:none;font:400 22px/1 var(--serif);letter-spacing:.2em}
.logo svg{width:18px;height:18px}
.top-r{justify-self:end;display:flex;align-items:center;gap:22px}
.toc{display:flex;gap:18px}
.toc a{text-decoration:none;font-size:13.5px;color:var(--color-text-secondary)}
.toc a:hover{color:var(--color-text-primary)}
.toggle{position:relative;width:52px;height:28px;border-radius:999px;border:1px solid var(--color-border-default);background:var(--color-bg-sunken);cursor:pointer;flex:none}
.knob{position:absolute;top:3px;left:3px;width:20px;height:20px;border-radius:50%;background:var(--color-accent-am);transition:transform .45s var(--ease),background-color .45s;display:grid;place-items:center}
.knob::after{content:"";width:8px;height:8px;border-radius:50%;background:var(--color-bg-tint-am)}
[data-theme="night"] .knob{transform:translateX(24px);background:var(--color-accent-pm)}
[data-theme="night"] .knob::after{width:9px;height:9px;background:transparent;box-shadow:inset -3px -1px 0 0 var(--color-bg-tint-pm)}

/* hero */
.hero{padding:clamp(56px,9vw,120px) var(--pad) clamp(40px,6vw,64px);max-width:1440px;margin:0 auto}
.time-tag{display:inline-flex;align-items:center;gap:10px;font:400 11px/1.4 var(--mono);letter-spacing:.06em;text-transform:uppercase;color:var(--color-text-secondary)}
.time-tag i{width:7px;height:7px;border-radius:50%;background:var(--color-accent-am);flex:none}
.time-tag.pm i{background:var(--color-accent-pm)}
h1{font:400 clamp(4rem,11vw,9.5rem)/.92 var(--serif);letter-spacing:-.02em;margin:22px 0 28px;max-width:11ch}
.lede{font-size:clamp(1.1rem,1.8vw,1.4rem);line-height:1.5;color:var(--color-text-secondary);max-width:52ch}
.meta{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;background:var(--color-border-default);border:1px solid var(--color-border-default);border-radius:var(--radius-l);overflow:hidden;margin-top:clamp(36px,5vw,56px)}
.meta div{background:var(--color-bg-surface);padding:18px 20px}
.meta dt{font:400 10.5px var(--mono);letter-spacing:.06em;text-transform:uppercase;color:var(--color-text-muted);margin-bottom:6px}
.meta dd{font-size:15px;line-height:1.45}
.stats{list-style:none;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-top:12px}
.stats li{padding:18px 20px;border-radius:var(--radius-l);background:var(--color-bg-sunken)}
.stats b{display:block;font:400 clamp(2.2rem,4vw,3.2rem)/1 var(--serif)}
.stats span{font-size:14px;color:var(--color-text-secondary)}

/* film */
.film{padding:0 var(--pad) clamp(60px,9vw,120px);max-width:1520px;margin:0 auto}
.frame{border-radius:var(--radius-l);overflow:hidden;background:#0D0E12;box-shadow:var(--shadow-raised)}
.frame video{display:block;width:100%;height:auto;aspect-ratio:16/9;background:#0D0E12}
.cap{margin-top:14px;font-size:14px;color:var(--color-text-muted);text-align:center}

/* sections */
.sec{padding:clamp(70px,10vw,130px) var(--pad);border-top:1px solid var(--color-border-default)}
.sec>*{max-width:1440px;margin-left:auto;margin-right:auto}
.sunken{background:var(--color-bg-sunken)}
.num{font:400 11px var(--mono);letter-spacing:.06em;text-transform:uppercase;color:var(--color-text-accent)}
.split{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:clamp(28px,5vw,80px);align-items:start;margin-top:20px;margin-bottom:clamp(36px,5vw,64px)}
h2{font:400 clamp(2.5rem,5.4vw,4.6rem)/1 var(--serif);letter-spacing:-.015em}
.prose{color:var(--color-text-secondary);font-size:clamp(1rem,1.25vw,1.1rem)}
.prose p+p{margin-top:14px}
.note{margin-top:16px;font-size:13.5px;color:var(--color-text-muted)}

.brief{list-style:none;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.brief li{background:var(--color-bg-surface);border:1px solid var(--color-border-default);border-radius:var(--radius-l);padding:22px}
.brief b{display:block;font:400 1.6rem/1.1 var(--serif);margin-bottom:8px}
.brief span{color:var(--color-text-secondary);font-size:15px}

/* decisions */
.dec{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:clamp(28px,5vw,80px);align-items:center;padding:clamp(28px,4vw,48px) 0;border-top:1px solid var(--color-border-default)}
.dec.flip{grid-template-columns:minmax(0,1fr) minmax(0,1.25fr)}
.dec.flip .shot{order:2}
.shot{border-radius:var(--radius-l);overflow:hidden;box-shadow:var(--shadow-raised);border:1px solid var(--color-border-default);background:var(--color-bg-surface)}
.dec h3{font:400 clamp(2rem,3.4vw,3rem)/1.04 var(--serif);margin:14px 0 14px}
.dec-text>p:last-child{color:var(--color-text-secondary);max-width:48ch}

/* day/night compare */
.compare{position:relative;aspect-ratio:1200/750;--pos:50%;user-select:none;touch-action:pan-y}
.compare img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.compare .before{clip-path:inset(0 calc(100% - var(--pos)) 0 0)}
.compare input{position:absolute;inset:0;width:100%;height:100%;opacity:0;cursor:ew-resize;margin:0;z-index:3}
.compare .handle{position:absolute;top:0;bottom:0;left:var(--pos);width:2px;margin-left:-1px;background:#F3F2EE;box-shadow:0 0 0 1px rgba(21,22,26,.2);z-index:2;pointer-events:none}
.compare .handle i{position:absolute;top:50%;left:50%;width:42px;height:42px;margin:-21px 0 0 -21px;border-radius:50%;background:linear-gradient(90deg,#E07B4F 50%,#4B4391 50%);box-shadow:0 6px 18px rgba(0,0,0,.3)}
.compare input:focus-visible~.handle i{outline:2px solid #F3F2EE;outline-offset:3px}
.compare .tag{position:absolute;top:12px;z-index:2;font:400 10.5px var(--mono);letter-spacing:.06em;text-transform:uppercase;padding:6px 10px;border-radius:999px;pointer-events:none}
.compare .tb{left:12px;background:#F3F2EE;color:#15161A}
.compare .ta{right:12px;background:#15161A;color:#F3F2EE}

/* process board */
.board{border-radius:var(--radius-l);overflow:hidden;border:1px solid var(--color-border-default);background:var(--color-bg-surface);box-shadow:var(--shadow-raised)}
.board-bar{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:12px 16px;border-bottom:1px solid var(--color-border-default);font-size:11px;color:var(--color-text-muted)}
.board-btns{display:flex;gap:8px}
.board-btns button,.board-btns a{font:500 13px var(--sans);padding:8px 14px;border-radius:999px;border:1px solid var(--color-border-default);background:var(--color-bg-page);color:var(--color-text-primary);text-decoration:none;cursor:pointer;white-space:nowrap}
.board-btns button:hover,.board-btns a:hover{border-color:var(--color-border-strong)}
.board-view{max-height:min(78vh,860px);overflow:hidden;background:#fff;position:relative}
.board-view img{width:100%}
.board-view.zoom{overflow:auto;cursor:grab;overscroll-behavior:contain}
.board-view.zoom img{width:2800px;max-width:none}
.board-view.zoom.drag{cursor:grabbing}
.board-view:not(.zoom)::after{content:"";position:absolute;left:0;right:0;bottom:0;height:120px;background:linear-gradient(transparent,rgba(255,255,255,.95));pointer-events:none}
.insights{list-style:none;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:clamp(28px,4vw,44px)}
.insights li{padding:20px 20px 28px;font-size:15px;line-height:1.45;color:#15161A;border-radius:4px;box-shadow:0 10px 22px -14px rgba(0,0,0,.35)}
.insights .s1{background:#A8D8FF}.insights .s2{background:#B9E3FF}.insights .s3{background:#FFE299}
.insights .s4{background:#FFB3DE}.insights .s5{background:#D9C8FF}.insights .s6{background:#B7EDC4}
.insights li:nth-child(odd){transform:rotate(-.6deg)}.insights li:nth-child(even){transform:rotate(.5deg)}

/* system */
.chain{list-style:none;display:grid;grid-template-columns:repeat(4,minmax(0,1fr)) minmax(0,1.3fr);gap:10px;margin-bottom:14px;counter-reset:c}
.chain li{position:relative;padding:18px;border-radius:var(--radius-l);background:var(--color-bg-surface);border:1px solid var(--color-border-default)}
.chain li:not(.end)::after{content:"→";position:absolute;right:-12px;top:50%;transform:translateY(-50%);width:14px;text-align:center;color:var(--color-text-muted);z-index:1}
.chain b{display:block;font:400 1.5rem/1.1 var(--serif)}
.chain span{font:400 11px var(--mono);color:var(--color-text-muted)}
.chain .end{background:var(--color-bg-inverse);color:var(--color-text-inverse);border-color:transparent}
.chain .end span{color:var(--color-text-inverse-muted)}
.tokens{background:var(--color-bg-surface);border:1px solid var(--color-border-default);border-radius:var(--radius-l);padding:8px 20px;margin-bottom:14px}
.tok-head,.tok{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr) minmax(0,1fr);gap:12px;align-items:center;padding:11px 0}
.tok-head{font:400 10.5px var(--mono);letter-spacing:.06em;text-transform:uppercase;color:var(--color-text-muted)}
.tok{border-top:1px solid var(--color-border-default);font:400 12px var(--mono);color:var(--color-text-secondary)}
.tok code{font-size:12.5px}
.tok span{display:flex;align-items:center;gap:10px}
.tok i{width:30px;height:30px;border-radius:8px;box-shadow:inset 0 0 0 1px rgba(128,128,128,.35);flex:none}
.two{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-bottom:14px}
.card{background:var(--color-bg-surface);border:1px solid var(--color-border-default);border-radius:var(--radius-l);padding:22px}
.card-t{font:400 11px var(--mono);letter-spacing:.06em;text-transform:uppercase;color:var(--color-text-accent);margin-bottom:14px}
.card-f{margin-top:14px;font-size:14px;color:var(--color-text-muted)}
.ctable{width:100%;border-collapse:collapse;font-size:14px}
.ctable th{text-align:left;font:400 10.5px var(--mono);letter-spacing:.06em;text-transform:uppercase;color:var(--color-text-muted);padding:0 0 8px}
.ctable td{padding:9px 0;border-top:1px solid var(--color-border-default)}
.ctable td+td,.ctable th+th{text-align:right;width:70px;font-family:var(--mono);font-size:12.5px}
.tscale{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px 16px;align-items:baseline}
.tscale>span{font-size:10.5px;color:var(--color-text-muted);white-space:nowrap}
.t-xl{font:400 clamp(2.6rem,5vw,4rem)/1 var(--serif)}
.t-l{font:400 clamp(1.8rem,3vw,2.6rem)/1.05 var(--serif)}
.t-h{font:500 1.2rem/1.4 var(--sans)}
.t-b{font:400 1.05rem/1.55 var(--sans);color:var(--color-text-secondary)}
.t-m{font-size:11px;text-transform:uppercase;letter-spacing:.06em}
.comps{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.comps figure{background:#FBFAF8;border:1px solid #D9D6CE;border-radius:var(--radius-l);padding:clamp(14px,2.2vw,26px);display:grid;gap:12px;align-content:space-between}
.comps .w2{grid-column:span 2}
.comps img{margin:0 auto;max-height:440px;width:auto}
figcaption{font:400 10.5px var(--mono);letter-spacing:.06em;text-transform:uppercase;color:#67635C}

/* screens: browser + phones */
.browser{border-radius:14px;overflow:hidden;border:1px solid var(--color-border-default);background:var(--color-bg-surface);box-shadow:var(--shadow-raised)}
.b-bar{display:flex;align-items:center;gap:16px;padding:10px 14px;border-bottom:1px solid var(--color-border-default)}
.dots{display:flex;gap:6px;flex:none}.dots i{width:11px;height:11px;border-radius:50%;background:var(--color-border-default)}
.b-tabs{display:flex;gap:4px;overflow-x:auto;scrollbar-width:none}
.b-tabs::-webkit-scrollbar{display:none}
.b-tabs button{font:500 13px var(--sans);padding:7px 13px;border-radius:999px;border:0;background:transparent;color:var(--color-text-secondary);cursor:pointer;white-space:nowrap}
.b-tabs button:hover{background:var(--color-bg-sunken)}
.b-tabs button[aria-selected="true"]{background:var(--color-action-primary);color:var(--color-text-inverse)}
.b-view{height:min(74vh,760px);overflow-y:auto;overscroll-behavior:contain;background:var(--color-bg-page);scrollbar-width:thin}
.b-view img{width:100%}
.m-head{margin-top:clamp(70px,9vw,120px)}
.phones{display:grid;grid-auto-flow:column;grid-auto-columns:clamp(220px,22vw,290px);gap:clamp(16px,2vw,28px);overflow-x:auto;scroll-snap-type:x mandatory;scroll-padding-inline:var(--pad);padding:6px var(--pad) 26px;max-width:none!important;margin-left:calc(-1 * var(--pad))!important;margin-right:calc(-1 * var(--pad))!important;scrollbar-width:thin}
.phones figure{scroll-snap-align:start}
.ph{aspect-ratio:390/844;border-radius:34px;border:7px solid #15161A;overflow-y:auto;overscroll-behavior:contain;background:#F3F2EE;box-shadow:var(--shadow-raised);scrollbar-width:none;margin-bottom:12px}
.ph::-webkit-scrollbar{display:none}
.phones figcaption{color:var(--color-text-muted)}
.gal-nav{display:flex;gap:8px;justify-content:flex-end}
.gal-nav button{width:48px;height:48px;border-radius:50%;border:1px solid var(--color-border-default);background:var(--color-bg-surface);font:500 18px var(--sans);color:var(--color-text-primary);cursor:pointer}
.gal-nav button:hover{border-color:var(--color-border-strong)}

/* shopify */
.table-wrap{overflow-x:auto;border:1px solid var(--color-border-default);border-radius:var(--radius-l);background:var(--color-bg-surface);margin-bottom:14px}
.map{width:100%;min-width:820px;border-collapse:collapse;font-size:14px}
.map th{text-align:left;font:400 10.5px var(--mono);letter-spacing:.06em;text-transform:uppercase;color:var(--color-text-muted);padding:14px 18px;border-bottom:1px solid var(--color-border-default)}
.map td{padding:13px 18px;border-top:1px solid var(--color-border-default);vertical-align:top;color:var(--color-text-secondary)}
.map td:first-child{color:var(--color-text-primary);font-weight:500;white-space:nowrap}
.map tr:first-child td{border-top:0}
.kv div{padding:10px 0;border-top:1px solid var(--color-border-default)}
.kv div:first-child{border-top:0;padding-top:0}
.kv dt{font-size:14px;font-weight:500}
.kv dd{font-size:14px;color:var(--color-text-secondary)}
.limits{background:var(--color-bg-tint-am);border-radius:var(--radius-l);padding:22px}
.limits ul{list-style:none;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 28px}
.limits li{font-size:14.5px;color:var(--color-text-secondary);padding-left:18px;position:relative}
.limits li::before{content:"";position:absolute;left:0;top:.62em;width:7px;height:7px;border-radius:50%;background:var(--color-accent-am)}

/* prototype (always inverse) */
/* the prototype stage stays dark in both themes, like the store's own announcement bar */
.inverse{--color-text-inverse:#F3F2EE;--color-bg-inverse:#15161A;--color-border-inverse:#46433E;--color-action-accent:#E07B4F;background:#15161A;color:#F3F2EE;border-top:0}
.inverse .prose{color:#B9B6AF}
.inverse .num{color:#E07B4F}
.btn{display:inline-flex;align-items:center;gap:10px;text-decoration:none;font:500 15px var(--sans);border-radius:999px;padding:15px 24px;background:var(--color-action-accent);color:var(--color-text-on-accent);border:0;cursor:pointer;transition:transform .3s var(--ease),filter .3s}
.btn:hover{transform:translateY(-2px);filter:brightness(1.05)}
.btn.alt{background:var(--color-text-inverse);color:var(--color-bg-inverse)}
.btn.ghost{background:transparent;color:var(--color-text-inverse);box-shadow:inset 0 0 0 1px var(--color-border-inverse)}
.btn.ghost-ink{background:transparent;color:var(--color-text-primary);box-shadow:inset 0 0 0 1px var(--color-border-strong)}
.links{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.links.center{justify-content:center;margin-top:0}
.proto{position:relative;border-radius:var(--radius-l);overflow:hidden;aspect-ratio:16/9;background:#0D0E12}
.proto-poster{width:100%;height:100%;object-fit:cover;opacity:.3;filter:blur(6px);transform:scale(1.06)}
.proto-cta{position:absolute;inset:0;display:grid;place-content:center;justify-items:center;gap:12px;text-align:center;padding:16px}
.proto-btns{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.proto-cta p{font-size:13px;color:#B9B6AF}
.proto.live{aspect-ratio:auto;height:min(86vh,900px)}
.proto iframe{width:100%;height:100%;border:0;display:block}

/* learned + next + footer */
.learn{list-style:none;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:20px;counter-reset:l}
.learn li{background:var(--color-bg-surface);border:1px solid var(--color-border-default);border-radius:var(--radius-l);padding:24px;counter-increment:l}
.learn li::before{content:"0" counter(l) ":00";display:block;font:400 11px var(--mono);color:var(--color-text-accent);margin-bottom:14px}
.learn b{display:block;font:400 1.7rem/1.1 var(--serif);margin-bottom:10px}
.learn span{color:var(--color-text-secondary);font-size:15px}
.next{padding:clamp(60px,8vw,110px) var(--pad);text-align:center;border-top:1px solid var(--color-border-default)}
.next p{font:italic 400 clamp(2.4rem,5vw,3.8rem)/1.05 var(--serif);margin-bottom:26px}
.foot{padding:28px var(--pad) 40px;border-top:1px solid var(--color-border-default);color:var(--color-text-muted);font-size:14px;text-align:center}
.foot b{color:var(--color-text-primary)}

/* reveal */
.js .rv{opacity:0;transform:translateY(24px);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.js .rv.in{opacity:1;transform:none}

/* responsive */
@media (max-width:1100px){.toc{display:none}}
@media (max-width:980px){
  .meta,.stats{grid-template-columns:repeat(2,minmax(0,1fr))}
  .split,.two{grid-template-columns:minmax(0,1fr)}
  .brief,.learn,.insights{grid-template-columns:minmax(0,1fr)}
  .dec,.dec.flip{grid-template-columns:minmax(0,1fr)}
  .dec.flip .shot{order:0}
  .chain{grid-template-columns:repeat(2,minmax(0,1fr))}
  .chain li::after{display:none}
  .chain .end{grid-column:span 2}
  .limits ul{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:640px){
  .top{grid-template-columns:1fr auto auto}
  .back{font-size:0;gap:0}.back span{font-size:18px}
  .meta{grid-template-columns:minmax(0,1fr)}
  .tok-head,.tok{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
  .tok-head span:first-child{grid-column:span 2}
  .tok code{grid-column:span 2}
  .comps{grid-template-columns:minmax(0,1fr)}
  .comps .w2{grid-column:auto}
  .b-view{height:62vh}
  .board-view{max-height:60vh}
  .proto.live{height:80vh}
}