/* =====================================================================
   SCALE TRENDS — SIGNAL · light editorial, stacked sheets, Klein blue
   ===================================================================== */
:root{
  --paper:#edeff3;
  --paper-2:#e2e5ec;
  --ink:#0e1018;
  --ink-70:rgba(14,16,24,.7);
  --ink-45:rgba(14,16,24,.45);
  --ink-15:rgba(14,16,24,.14);
  --klein:#1226d8;
  --klein-deep:#0b1aa6;
  --sky:#c7d0ff;
  --white:#f6f7fa;

  --fg:var(--ink);
  --fg-70:var(--ink-70);
  --fg-45:var(--ink-45);
  --line:var(--ink-15);
  --bar-bg:var(--paper);

  --font-display:"Bricolage Grotesque",system-ui,sans-serif;
  --font-body:"Hanken Grotesk",system-ui,sans-serif;
  --font-mono:"Geist Mono",ui-monospace,Menlo,monospace;

  --gutter:clamp(20px,4.5vw,72px);
  --sheet-radius:clamp(22px,3vw,44px);
  --ease:cubic-bezier(.16,1,.3,1);
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
html,body{overflow-x:clip}
body{background:var(--ink);color:var(--ink);font-family:var(--font-body);font-size:clamp(15px,1.05vw,18px);line-height:1.5;-webkit-font-smoothing:antialiased;font-weight:400}
body.is-loading{overflow:hidden}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
button,input{font:inherit;color:inherit}
::selection{background:var(--klein);color:var(--white)}
:focus-visible{outline:2px solid var(--klein);outline-offset:3px}

.display{font-family:var(--font-display);font-weight:800;font-optical-sizing:auto;font-variation-settings:"opsz" 96,"wdth" 100;letter-spacing:-.03em;line-height:.95}
.mono{font-family:var(--font-mono);font-weight:400;font-size:.7rem;letter-spacing:.06em;text-transform:uppercase}
.wrap{width:min(1400px,100% - 2*var(--gutter));margin-inline:auto}
.klein{color:var(--klein)}
.klein-text{color:var(--klein)}
.eyebrow{display:flex;align-items:center;gap:12px;margin-bottom:clamp(22px,2.6vw,36px);color:var(--fg-70)}
.eyebrow::before{content:"";width:9px;height:9px;border-radius:50%;background:var(--klein);flex:none}
.h1{font-size:clamp(40px,min(7.4vw,11.5svh),120px);line-height:.92;letter-spacing:-.035em}
@media (min-width:901px){.hero .h1 .line{white-space:nowrap}}
.h2{font-size:clamp(38px,5.4vw,84px);line-height:.96;letter-spacing:-.03em}
.h3{font-size:clamp(36px,4.6vw,72px);letter-spacing:-.04em;line-height:1}
.lede{font-size:clamp(17px,1.3vw,22px);line-height:1.45;color:var(--fg-70);max-width:46ch}
.body{font-size:clamp(16px,1.15vw,19px);line-height:1.55;color:var(--fg-70);max-width:44ch}

/* reveal primitives (distinct from site A: clip-path wipes + blur) */
[data-wipe] .line{display:block}
[data-wipe] .line-in{display:inline-block;clip-path:inset(0 0 0 0);will-change:clip-path,transform}
[data-blur] .w{display:inline-block;will-change:filter,opacity,transform}
[data-eyebrow]{will-change:letter-spacing,opacity}

/* pills */
.pill{--pad:1em 1.45em;display:inline-flex;align-items:center;justify-content:center;gap:.5em;padding:var(--pad);border-radius:999px;border:1px solid var(--line);font-weight:600;font-size:.95rem;position:relative;isolation:isolate;overflow:hidden;white-space:nowrap;transition:color .35s,border-color .35s;will-change:transform;cursor:pointer;background:transparent;color:var(--fg)}
.pill span{position:relative;z-index:1}
.pill::before{content:"";position:absolute;inset:0;border-radius:inherit;background:var(--klein);transform:scaleY(0);transform-origin:bottom;transition:transform .5s var(--ease);z-index:0}
.pill:hover{color:var(--white);border-color:var(--klein)}
.pill:hover::before{transform:scaleY(1)}
.pill--fill{background:var(--fg);color:var(--bar-bg);border-color:var(--fg)}
.pill--fill:hover{color:var(--white)}

/* =====================================================================
   intro curtain
   ===================================================================== */
.curtain{position:fixed;inset:0;z-index:300;pointer-events:none}
.curtain-panel{position:absolute;inset:0;transform-origin:top}
.curtain-panel--klein{background:var(--klein)}
.curtain-panel--ink{background:var(--ink)}
.curtain-word{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);color:var(--white);font-size:clamp(28px,4vw,56px);letter-spacing:-.04em;white-space:nowrap}

/* =====================================================================
   fixed chrome — theme switches with the active sheet
   ===================================================================== */
body[data-theme="dark"]{--fg:var(--white);--fg-70:rgba(246,247,250,.72);--fg-45:rgba(246,247,250,.45);--line:rgba(246,247,250,.18);--bar-bg:var(--ink)}
.bar{position:fixed;top:0;left:0;right:0;z-index:100;display:flex;align-items:center;justify-content:space-between;padding:18px var(--gutter);color:var(--fg);transition:color .6s}
.logo{display:flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:700;font-size:17px;letter-spacing:-.02em}
.logo svg{transition:color .6s}
.bar-nav{display:flex;gap:26px;color:var(--fg-70);position:absolute;left:50%;transform:translateX(-50%)}
.bar-nav a{padding:6px 0;position:relative}
.bar-nav a::after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:currentColor;transform:scaleX(0);transform-origin:left;transition:transform .5s var(--ease)}
.bar-nav a:hover::after{transform:scaleX(1)}
.bar .pill{padding:.75em 1.15em;font-size:.8rem}
.bar .pill--fill{transition:background .6s,color .6s,border-color .6s}

.index{position:fixed;left:calc(var(--gutter) - 10px);bottom:18px;z-index:100;display:flex;align-items:center;gap:12px;color:var(--fg-70);transition:color .6s,background .6s;pointer-events:none;padding:7px 10px;border-radius:999px;background:rgba(237,239,243,.6);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}
body[data-theme="dark"] .index{background:rgba(14,16,24,.35)}
.index i{width:28px;height:1px;background:currentColor;opacity:.5}
.dots{position:fixed;right:calc(var(--gutter) - 6px);top:50%;transform:translateY(-50%);z-index:100;display:grid;gap:12px;pointer-events:none}
.dots li{width:6px;height:6px;border-radius:50%;background:var(--fg);opacity:.25;transition:opacity .5s,transform .5s,background .6s}
.dots li.is-on{opacity:1;transform:scale(1.5)}

/* =====================================================================
   sheets mechanic
   ===================================================================== */
main{position:relative;z-index:1}
.sheet-wrap{position:relative;height:calc(var(--len,1) * 100vh + 200vh)}
.sheet-wrap + .sheet-wrap{margin-top:-100vh}
.sheet{position:sticky;top:0;height:100vh;height:100svh;overflow:hidden;border-radius:var(--sheet-radius) var(--sheet-radius) 0 0;transform-origin:50% 0;will-change:transform;isolation:isolate}
.sheet::after{content:"";position:absolute;inset:0;background:#000;opacity:var(--dim,0);pointer-events:none;z-index:5;border-radius:inherit}
.sheet--paper{background:var(--paper);color:var(--ink)}
.sheet--klein{background:var(--klein);color:var(--white)}
.sheet--ink{background:var(--ink);color:var(--white)}
.sheet--klein .eyebrow,.sheet--ink .eyebrow{color:rgba(246,247,250,.7)}
.sheet--klein .eyebrow::before{background:var(--white)}
.sheet-inner{position:relative;height:100%;padding:clamp(88px,12vh,140px) var(--gutter) clamp(60px,8vh,96px);display:flex;flex-direction:column}
.sheet-wrap:first-of-type .sheet{border-radius:0}

/* =====================================================================
   01 · hero
   ===================================================================== */
.hero{display:flex;flex-direction:column}
.hero-inner{flex:1;display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);align-items:center;gap:clamp(24px,4vw,64px);padding:clamp(84px,13svh,150px) var(--gutter) 0;min-height:0}
.hero-copy{position:relative;z-index:2}
.hero .h1{margin-bottom:clamp(16px,3svh,36px)}
.hero .lede{margin-bottom:clamp(18px,3.4svh,40px);font-size:clamp(15px,min(1.3vw,2.4svh),22px)}
.actions{display:flex;flex-wrap:wrap;gap:12px}

/* deck of cards (signature) */
.deck{position:relative;height:min(58svh,620px);perspective:1600px;transform-style:preserve-3d}
.card{position:absolute;left:50%;top:50%;width:clamp(150px,15vw,216px);aspect-ratio:4/5;margin:0;border-radius:18px;overflow:hidden;background:var(--paper-2);box-shadow:0 40px 90px -30px rgba(14,16,24,.35),0 2px 0 rgba(255,255,255,.6) inset;transform-origin:50% 120%;will-change:transform;--r:calc((var(--i) - 2) * 6deg);--x:calc((var(--i) - 2) * 28%);transform:translate(-50%,-50%) translateX(var(--x)) rotate(var(--r))}
.card img{width:100%;height:100%;object-fit:cover}
.card figcaption{position:absolute;left:10px;bottom:10px;padding:6px 9px;border-radius:999px;background:rgba(246,247,250,.85);color:var(--ink);font-size:.6rem;backdrop-filter:blur(8px)}
.card:nth-child(3){z-index:5}.card:nth-child(2),.card:nth-child(4){z-index:4}.card:nth-child(1),.card:nth-child(5){z-index:3}

.ticker{border-top:1px solid var(--ink-15);padding:clamp(10px,2svh,18px) 0;margin-bottom:clamp(20px,6svh,52px);overflow:hidden;color:var(--ink-45);flex:none}
.ticker-track{display:flex;gap:0;width:max-content;animation:ticker 40s linear infinite}
.ticker-track span{padding:0 28px;position:relative;font-size:.72rem;letter-spacing:.14em}
.ticker-track span::after{content:"";position:absolute;right:-3px;top:50%;width:5px;height:5px;border-radius:50%;background:var(--klein);transform:translateY(-50%)}
@keyframes ticker{to{transform:translateX(-50%)}}

/* =====================================================================
   02 · math (klein)
   ===================================================================== */
.math .sheet-inner{justify-content:center}
.math-grid{display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);gap:clamp(24px,4vw,72px);align-items:start}
.math-label{display:block;color:rgba(246,247,250,.7);margin-bottom:18px}
.math-big{font-size:clamp(56px,min(9vw,13svh),150px);line-height:.9;letter-spacing:-.05em;font-variant-numeric:tabular-nums}
.math-sub{color:rgba(246,247,250,.7);margin:10px 0 26px;font-size:clamp(15px,1.1vw,18px)}
.math-list{display:grid;gap:10px;border-top:1px solid rgba(246,247,250,.25);padding-top:20px;font-size:clamp(16px,1.2vw,20px)}
.math-list strong{font-weight:700;font-variant-numeric:tabular-nums}
.math-vs{align-self:center;font-size:clamp(28px,3.5vw,54px);color:rgba(246,247,250,.5);font-weight:500;letter-spacing:-.02em;padding-top:2.2em}
.math-result{margin-top:clamp(32px,6vh,72px);display:flex;align-items:baseline;gap:clamp(16px,2.5vw,40px);flex-wrap:wrap;border-top:1px solid rgba(246,247,250,.25);padding-top:clamp(24px,4vh,48px)}
.result-n{font-size:clamp(64px,min(12vw,16svh),200px);letter-spacing:-.06em;line-height:.85;font-variant-numeric:tabular-nums}
.result-t{max-width:26ch;font-size:clamp(17px,1.4vw,24px);line-height:1.35;color:rgba(246,247,250,.85)}

/* =====================================================================
   03 · gallery (paper) parallax columns
   ===================================================================== */
.gallery{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:clamp(24px,4vw,64px);padding:0 var(--gutter)}
.gallery-head{align-self:center;padding-top:8vh;padding-bottom:90px;position:relative;z-index:2}
.gallery .h2{font-size:clamp(32px,4.2vw,66px)}
.gallery-head .h2{margin-bottom:clamp(20px,2.2vw,32px)}
.columns{position:relative;height:100%;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(12px,1.4vw,20px);align-items:start;mask-image:linear-gradient(to bottom,transparent 0,#000 8%,#000 92%,transparent 100%);-webkit-mask-image:linear-gradient(to bottom,transparent 0,#000 8%,#000 92%,transparent 100%)}
.col{display:grid;gap:clamp(12px,1.4vw,20px);will-change:transform;padding-top:14vh}
.col:nth-child(2){padding-top:2vh}
.col:nth-child(3){padding-top:24vh}
.tile{margin:0;border-radius:14px;overflow:hidden;background:var(--paper-2);position:relative;box-shadow:0 20px 50px -25px rgba(14,16,24,.35)}
.tile img{width:100%;aspect-ratio:4/5;object-fit:cover;transition:transform 1.2s var(--ease)}
.col:nth-child(2) .tile img{aspect-ratio:3/4}
.tile:hover img{transform:scale(1.04)}
.tile figcaption{position:absolute;left:0;right:0;bottom:0;padding:10px 12px;display:flex;justify-content:space-between;gap:8px;color:var(--white);background:linear-gradient(to top,rgba(14,16,24,.75),transparent);font-size:.58rem}
.tile figcaption span:last-child{color:var(--sky)}

/* =====================================================================
   04 · the month (ink)
   ===================================================================== */
.month-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(24px,4vw,80px);align-items:center;flex-direction:row}
.month-left{position:relative;align-self:stretch;display:flex;flex-direction:column;justify-content:center}
.month-left .eyebrow{position:absolute;top:0}
.week-digits{position:relative;height:clamp(120px,22vw,320px);font-size:clamp(120px,22vw,320px);line-height:.85;letter-spacing:-.06em;color:var(--klein)}
.wk{position:absolute;left:0;top:0;opacity:0;will-change:transform,opacity;-webkit-text-stroke:0}
.month-bar{height:1px;background:rgba(246,247,250,.2);margin-top:clamp(20px,3vh,36px);position:relative;overflow:hidden}
.month-bar i{position:absolute;left:0;top:0;bottom:0;width:100%;background:var(--klein);transform-origin:left;transform:scaleX(0)}
.steps{position:relative;min-height:clamp(260px,40vh,420px)}
.step{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:center;gap:14px;opacity:0;will-change:transform,opacity}
.step .mono{color:rgba(246,247,250,.6)}
.step p{color:rgba(246,247,250,.78);max-width:44ch;font-size:clamp(16px,1.2vw,20px)}

/* =====================================================================
   05 · proof (klein)
   ===================================================================== */
.proof .sheet-inner{justify-content:center}
.quotes{position:relative;min-height:clamp(320px,46vh,520px)}
.quote{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:center;gap:28px;opacity:0;will-change:transform,opacity}
.quote p{font-size:clamp(28px,4.4vw,72px);font-weight:700;letter-spacing:-.03em;line-height:1.02;max-width:24ch}
.quote footer{color:rgba(246,247,250,.7)}
.proof .footnote{margin-top:auto;color:rgba(246,247,250,.5);text-transform:none;letter-spacing:.02em}

/* =====================================================================
   flow sections
   ===================================================================== */
.flow{position:relative;z-index:2;padding-block:clamp(96px,14vh,200px)}
.retainer,.faq{background:var(--paper);color:var(--ink)}
.retainer{border-radius:var(--sheet-radius) var(--sheet-radius) 0 0;margin-top:-100vh;position:relative}
.pilot{background:var(--ink);color:var(--white);padding-bottom:0}

.table-wrap{margin-top:clamp(40px,6vh,80px);overflow-x:auto;border-radius:22px;border:1px solid var(--ink-15);background:var(--white)}
.table{width:100%;min-width:820px;border-collapse:collapse;font-size:clamp(15px,1.05vw,18px)}
.table th,.table td{padding:clamp(14px,1.4vw,22px) clamp(16px,1.6vw,28px);text-align:left;vertical-align:top;border-bottom:1px solid var(--ink-15)}
.table thead th{vertical-align:bottom;padding-top:clamp(22px,2.4vw,34px);border-bottom:1px solid var(--ink)}
.table thead th .mono{display:block;color:var(--ink-45);margin-bottom:12px}
.table thead th .mono b{font-weight:400;color:var(--klein);margin-left:8px}
.table thead th strong{display:block;font-size:clamp(40px,4.4vw,72px);letter-spacing:-.05em;line-height:.9}
.table thead th em{font-style:normal;color:var(--ink-45);font-size:.9rem}
.table tbody th{font-weight:500;color:var(--ink-70);width:22%}
.table td{color:var(--ink)}
.table td strong{font-weight:700;font-size:1.15em}
.table .hot{background:rgba(18,38,216,.06)}
.table thead .hot{border-bottom-color:var(--klein)}
.table tbody tr:last-child th,.table tbody tr:last-child td{border-bottom:0}
.table-cta td{padding-top:clamp(20px,2vw,30px);padding-bottom:clamp(20px,2vw,30px)}
.table .pill{font-size:.85rem}
.included{display:flex;flex-wrap:wrap;gap:12px 30px;justify-content:center;margin-top:clamp(28px,4vh,48px);color:var(--ink-45)}
.included li{display:flex;align-items:center;gap:10px}
.included li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--klein)}

.faq{padding-top:0}
.faq-grid{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:clamp(32px,6vw,120px);align-items:start;border-top:1px solid var(--ink-15);padding-top:clamp(64px,10vh,140px)}
.acc-item{border-bottom:1px solid var(--ink-15)}
.acc-item:first-child{border-top:1px solid var(--ink-15)}
.acc-item summary span{flex:1;min-width:0}
.acc-item summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:20px;padding:clamp(20px,2vw,28px) 0;font-family:var(--font-display);font-weight:600;font-size:clamp(18px,1.5vw,26px);letter-spacing:-.02em}
.acc-item summary::-webkit-details-marker{display:none}
.acc-item summary i{flex:none;width:30px;height:30px;border-radius:50%;border:1px solid var(--ink-15);position:relative;transition:transform .5s var(--ease),background .3s,border-color .3s}
.acc-item summary i::before,.acc-item summary i::after{content:"";position:absolute;left:50%;top:50%;width:11px;height:1.5px;background:var(--ink);transform:translate(-50%,-50%)}
.acc-item summary i::after{transform:translate(-50%,-50%) rotate(90deg)}
.acc-item[open] summary i{transform:rotate(45deg);background:var(--klein);border-color:var(--klein)}
.acc-item[open] summary i::before,.acc-item[open] summary i::after{background:var(--white)}
.acc-body{overflow:hidden;color:var(--ink-70);max-width:54ch}
.acc-body p{padding-bottom:clamp(20px,2vw,28px)}

.pilot-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:clamp(32px,6vw,120px);align-items:center}
.pilot .eyebrow{color:rgba(246,247,250,.7)}
.pilot-h{font-size:clamp(64px,12vw,200px);margin-bottom:clamp(20px,2.6vw,36px);line-height:.88;letter-spacing:-.05em}
.pilot .lede{color:rgba(246,247,250,.75)}
.pilot-form{display:grid;gap:10px;padding:clamp(26px,2.8vw,44px);border-radius:24px;background:rgba(246,247,250,.04);border:1px solid rgba(246,247,250,.14)}
.pilot-form label{color:rgba(246,247,250,.55);margin-top:8px}
.pilot-form input{background:rgba(246,247,250,.06);border:1px solid rgba(246,247,250,.16);border-radius:12px;padding:16px 18px;color:var(--white);transition:border-color .3s}
.pilot-form input::placeholder{color:rgba(246,247,250,.3)}
.pilot-form input:focus{border-color:var(--klein);outline:none}
.pilot-form .pill{margin-top:14px;justify-self:start;background:var(--white);color:var(--ink);border-color:var(--white)}
.pilot-form .pill:hover{color:var(--white)}
.form-sent{color:var(--sky);opacity:0;transform:translateY(6px);transition:.5s var(--ease);text-transform:none;letter-spacing:.02em}
.pilot-form.is-sent .form-sent{opacity:1;transform:none}

.footer{margin-top:clamp(80px,12vh,160px);border-top:1px solid rgba(246,247,250,.14);overflow:hidden}
.footer-row{display:flex;flex-wrap:wrap;gap:12px 32px;padding:28px 0;color:rgba(246,247,250,.6)}
.footer-row a:hover{color:var(--white)}
.footer-word{text-align:center;font-size:min(12.5vw,200px);line-height:.78;height:.66em;overflow:hidden;color:var(--klein);letter-spacing:-.06em}
.footer-word span{display:block;will-change:transform;white-space:nowrap}

/* =====================================================================
   responsive
   ===================================================================== */
@media (max-width:1100px){
  .bar-nav{display:none}
  .dots{display:none}
}
@media (max-width:900px){
  .hero-inner{grid-template-columns:minmax(0,1fr);gap:20px;padding-top:110px;align-content:start}
  .h1{font-size:clamp(38px,11vw,52px)}
  .deck{height:min(40vh,320px)}
  .card{width:clamp(120px,26vw,180px);--x:calc((var(--i) - 2) * 40%)}
  .math-grid{grid-template-columns:minmax(0,1fr);gap:22px}
  .math-vs{display:none}
  .math-big{font-size:clamp(44px,13vw,120px)}
  .math-sub{margin:6px 0 14px;font-size:14px}
  .math-list{gap:6px;padding-top:12px;font-size:14px}
  .math-label{margin-bottom:10px}
  .math .eyebrow{margin-bottom:16px}
  .result-n{font-size:clamp(48px,15vw,140px)}
  .result-t{font-size:14px}
  .math-list{font-size:16px}
  .math .sheet-inner{justify-content:flex-start;overflow:hidden}
  .math-result{margin-top:18px;padding-top:16px;gap:14px}
  .gallery{grid-template-columns:minmax(0,1fr);grid-template-rows:auto minmax(0,1fr)}
  .gallery-head{padding-top:100px}
  .columns{gap:10px}
  .month-grid{grid-template-columns:minmax(0,1fr);align-content:start;gap:24px}
  .month-left{min-height:unset}
  .month-left .eyebrow{position:static}
  .week-digits{height:clamp(120px,32vw,200px);font-size:clamp(120px,32vw,200px)}
  .steps{min-height:260px}
  .faq-grid,.pilot-grid{grid-template-columns:minmax(0,1fr)}
  .h2{font-size:clamp(32px,9.2vw,40px)}
  .h3{font-size:clamp(30px,9vw,40px)}
  .index{display:none}
}
@media (max-width:560px){
  .bar .pill{display:none}
  .quote p{font-size:clamp(26px,8vw,40px)}
  .card{width:30vw}
}

@media (prefers-reduced-motion:reduce){
  .ticker-track{animation:none}
  .tile img,.pill{transition:none}
  .wk[data-wk="0"],.step[data-step="0"],.quote[data-quote="0"]{opacity:1}
}

/* short + narrow viewports (small tablet landscape, side panes) */
@media (max-height:720px) and (max-width:900px){
  .hero-inner{padding-top:80px;gap:6px;align-content:start}
  .hero .h1{font-size:clamp(30px,7vw,42px)}
  .hero .lede{font-size:14px;margin-bottom:12px;max-width:52ch}
  .deck{height:min(26svh,190px)}
  .card{width:clamp(80px,12vw,110px)}
  .ticker{display:none}
}