/* Full-bleed presentation: directional motion with stable reading frames. */
:root{--paper:#090d16;--ink:#edf1ff;--px:0px;--py:0px}body{background:#090d16;color:#edf1ff}#stage{inset:0;border-radius:0;background:radial-gradient(ellipse at 73% 46%,#222e44,#080b12 72%)}#stage:after{background:linear-gradient(90deg,#070a14d9,transparent 63%),linear-gradient(180deg,#060a12cc,transparent 18%,transparent 78%,#050910d9)}.noise{inset:0;border-radius:0;opacity:.025}header{left:6.7%;right:6.7%;height:80px;border-bottom:1px solid #b6c7fa15}.wordmark{font-size:15px;color:#f4f5ff;letter-spacing:1px}.wordmark span{font-size:8px;color:#a3b0d0}.top-actions button{color:#b7c3e0}.top-actions #index{background:#9eb1ef0b;border:1px solid #879bdc40;color:#f0f4ff;padding:11px 17px}.top-actions #index:hover{background:#7586de20}main{inset:80px 0 85px;perspective:1500px}.slide{padding:25px 7.3%;transform:translate3d(100px,0,-60px) rotateY(-5deg);transition:opacity .45s,transform .95s var(--ease),visibility .95s;will-change:transform,opacity}.slide.active{transform:translate3d(0,0,0) rotateY(0)}.slide>.copy{width:48%;transform:translate3d(var(--px),var(--py),0);will-change:transform}.slide.hero>.copy{width:70%}.slide.wide>.copy{width:100%}.slide.exit-forward{transform:translate3d(-150px,0,-140px) rotateY(8deg);opacity:0}.slide.exit-backward{transform:translate3d(150px,0,-140px) rotateY(-8deg);opacity:0}.slide.from-backward{transform:translate3d(-120px,0,-80px) rotateY(6deg)}.slide.from-backward.active{transform:translate3d(0,0,0) rotateY(0)}h1,h2{letter-spacing:-3px}.title-word{display:inline-block;white-space:nowrap}.title-letter{display:inline-block;font-style:inherit;transform-origin:50% 100%}.active .title-letter{animation:letter-arrive .8s var(--ease) both;animation-delay:calc(var(--letter-index) * 9ms)}.active .copy>.eyebrow{animation:content-arrive .65s var(--ease) both}.active .copy>.lede,.active .copy>.thought,.active .copy>.big-fact,.active .copy>.comparison,.active .copy>.exchange,.active .copy>.opinion-prompts{animation:content-arrive .9s .17s var(--ease) both}.active .copy>.action,.active .copy>.primary,.active .copy>.hint,.active .copy>.evidence{animation:content-arrive .9s .27s var(--ease) both}.side-arrow{position:fixed;top:50%;width:49px;height:80px;margin-top:-40px;border-radius:30px;border:1px solid #a5bbfc33;background:linear-gradient(150deg,#adc4ff10,#7a8cb403);color:#eaf0ff;z-index:38;display:grid;place-items:center;backdrop-filter:blur(6px);transition:transform .3s,background .3s,box-shadow .3s,border-color .3s}.side-arrow span{font-size:48px;font-weight:200;line-height:1;transform:translateY(-3px)}.side-arrow.left{left:1.25%}.side-arrow.right{right:1.25%}.side-arrow:hover:not(:disabled){transform:scale(1.08);background:#647bff24;box-shadow:0 0 35px #5167e42b;border-color:#a5b9ff99}.side-arrow:active:not(:disabled){transform:scale(.97)}.side-arrow:disabled{opacity:.12}.traveling .side-arrow{border-color:#778ef866}.stage-caption{right:7%;bottom:95px;opacity:.85}#chapterStamp{right:7%;top:110px;font-size:11px;color:#7e90b8}footer{left:6.7%;right:6.7%;height:76px;border-top:1px solid #b6c7fa15;color:#dce5fb}#count{color:#bacaff;font-size:14px}#count i{color:#7987a8}#sectionLabel{color:#96a6c8}#steps{max-width:360px}#steps button:before{background:#8a9ecb29}#steps button.done:before{background:#788dff66}#steps button[aria-current=true]:before{background:#b2c1ff;box-shadow:0 0 17px #8c9fff55}.keyboard-hint{font-size:9px;color:#8093bd;letter-spacing:1.3px;display:flex;align-items:center;gap:8px}.keyboard-hint kbd{font:14px Arial,sans-serif;border:1px solid #7185b73d;border-radius:5px;padding:4px 7px;letter-spacing:0;color:#b4c2df}#menu{background:#10192bef;border-color:#8195d642;color:#e6edff;box-shadow:0 25px 90px #0009}#menu button span{color:#8da0c8}#menu button[aria-current=true]{background:#536bdf2c;color:#becbff}#notes{background:#0e192df5;color:#e3ebff;border-color:#829bee55}#notes .notes-top{color:#91a8d7}#notesEvidence{color:#a4b9e2;border-color:#728fc43d}dialog{background:#0f192c;color:#e8eeff;border-color:#7f93cb66}dialog small{color:#a3b4d6}dialog a{color:#acbfff}.primary{box-shadow:0 10px 40px #5770ff28}.action{background:linear-gradient(115deg,#354cf4,#5264ff);box-shadow:0 8px 38px #314aea2b}.hero .primary{background:#e4ebff;color:#101827}.insight{backdrop-filter:blur(8px)}body[data-layout=wide] #stage:after{background:#080d16ad}.reduced .slide,.reduced .slide>.copy{transform:none!important}.reduced .title-letter{animation:none!important;transform:none!important;opacity:1!important}.reduced .slide{will-change:auto}#small{background:radial-gradient(ellipse at 50% 20%,#182443,#080d17);color:#e4ebff}#small p{color:#a9b9dc}#small em{color:#b3c3ff}#small .small-mark{color:#bac8ff}@keyframes letter-arrive{from{opacity:0;transform:translate3d(25px,45px,0) rotateX(-60deg);filter:blur(5px)}to{opacity:1;transform:none;filter:blur(0)}}@keyframes content-arrive{from{opacity:0;transform:translate3d(35px,12px,0)}to{opacity:1;transform:none}}@media(max-height:780px){header{height:65px}main{inset:65px 0 68px}#stage,.noise{inset:0}footer{height:62px}.slide{padding:20px 7.3%}.stage-caption{bottom:79px}#chapterStamp{top:85px}.side-arrow{height:70px;margin-top:-35px}.side-arrow span{font-size:43px}}@media(max-width:1150px){.side-arrow{width:40px}.side-arrow.left{left:.9%}.side-arrow.right{right:.9%}.top-actions{gap:14px}.keyboard-hint{font-size:8px;gap:5px}h1,h2{letter-spacing:-2px}.stage-caption{font-size:8px}#steps{max-width:240px}.slide>.copy{width:50%}.slide.hero>.copy{width:75%}.slide.wide>.copy{width:100%}}
/* Keyboard-first navigation: no lateral controls or visual clutter. */
.navigation[hidden]{display:none!important}