/* V4: explicit reading surfaces and an interactive exhibition instrument. */
:root{--bg:#e7ecee;--paper:#f1f4f4;--ink:#172a38;--muted:#4b5f6c;--blue:#245aa3;--line:#223c532b}
body{background:var(--bg)}
::selection{background:#b9d9ea;color:#13293c}
html{scrollbar-width:thin;scrollbar-color:#507e9e #dbe3e7}
::-webkit-scrollbar{width:9px;height:7px}::-webkit-scrollbar-track{background:#dbe3e7}::-webkit-scrollbar-thumb{background:linear-gradient(#87afc6,#365e7d);border:2px solid #dbe3e7;border-radius:12px}
#profile,#applications,#sources,footer{background:var(--bg);color:var(--ink)}
#profile{background:radial-gradient(ellipse at 95% 15%,#d4e2e9 0,transparent 50%),#e7ecee;position:relative;isolation:isolate}
#profile .intro-layout h2{font-weight:580;line-height:1.3;letter-spacing:-.055em}
#profile .intro-layout h2 em{color:#265b86}
#profile .large-copy{font-size:clamp(21px,1.9vw,30px);line-height:1.65;color:#203e54}
#profile .intro-right p:not(.large-copy){font-size:16px;line-height:1.95;color:#435b6b}
.section-index{font-size:14px;color:#425c6e}
.section-heading>p{font-size:16px;line-height:1.85;color:var(--muted)}
.footnote{font-size:14px;line-height:1.85;color:var(--muted)}
.source{font-size:14px;min-height:44px;line-height:1.7}
.metrics{position:relative;margin-top:64px;border-block:1px solid #7892a147}
.metrics>div{position:relative;overflow:hidden;transition:background .4s;min-height:145px}
.metrics>div:after{content:"";position:absolute;left:0;right:0;bottom:0;height:3px;background:#36728f;transform:scaleX(0);transform-origin:left;transition:transform .5s cubic-bezier(.16,1,.3,1)}
.metrics>div:hover{background:#d4e1e77a}.metrics>div:hover:after{transform:scaleX(1)}
.metrics strong{font-size:clamp(48px,5.1vw,78px);color:#203e54;font-variant-numeric:tabular-nums;transition:transform .4s;display:block}
.metrics>div:hover strong{transform:translateY(-4px)}.metrics span{font-size:14px;line-height:1.75;color:#4c6372}.metrics strong small{color:#466273;font-size:15px}
.metric-source{font-size:14px;color:#245a85}
#applications{background:#e4eaed}
.application-layout{grid-template-columns:.75fr 1.4fr;gap:40px}
.application-menu button{min-height:109px;position:relative;padding:24px 16px 24px 40px;color:#253f52;border-color:#91a5b647;background:transparent}
.application-menu button:before{content:attr(data-index);position:absolute;left:0;top:28px;font:11px Bahnschrift,monospace;color:#567186;transition:color .3s}
.application-menu button strong{font-size:clamp(18px,1.6vw,23px);line-height:1.45}.application-menu button span{font-size:14px;margin-top:8px;color:#4e6778}
.application-menu button:hover{background:#d6e1e7}.application-menu button[aria-selected=true]{padding-left:40px;background:#c9dae4;color:#173e60;box-shadow:inset 3px 0 #356988}.application-menu button[aria-selected=true]:before{color:#173e60}
#applicationPanel{background:#f1f4f4;box-shadow:0 18px 70px #3b526810;grid-template-columns:minmax(0,1fr) 24%;border:1px solid #92a8b347;gap:30px;padding:clamp(28px,3vw,48px);position:relative;overflow:hidden}
#applicationPanel:before{content:"";position:absolute;top:0;left:0;width:34%;height:2px;background:linear-gradient(90deg,#317c9b,transparent);transition:width .6s}#applicationPanel:hover:before{width:100%}
#applicationPanel h3{font-size:clamp(25px,2.2vw,34px);line-height:1.45;color:#1b3547}
#applicationPanel p{font-size:16px;line-height:1.85;color:#4b606e}
#applicationPanel ul{font-size:15px;line-height:2;color:#485f70}
#applicationPanel img{display:block;width:100%;height:240px;align-self:center;transition:transform .6s;filter:drop-shadow(0 10px 10px #233d5020)}#applicationPanel:hover img{transform:translateY(-5px) scale(1.04)}
#applicationPanel .application-fit{font-size:14px;line-height:1.8;color:#245e80}
#insight{--ink:#eaf2f5;--muted:#bfd0db;--blue:#9dd9ee;--line:#8cb0c236;background:#122c3d;color:var(--ink);position:relative;isolation:isolate}
#insight:before{content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;background:radial-gradient(ellipse at 0 0,#22506a75,transparent 65%)}
#insight h2{color:#edf4f7}#insight .section-heading>p{color:#bfd0db}
.insight-list summary{padding:32px 20px;transition:background .3s}.insight-list summary:hover{background:#88bdd710}
.insight-list summary>span{font-size:14px;color:#b3cbd8}.insight-list summary h3{font-size:clamp(24px,2vw,32px);color:#e0edf4;line-height:1.5}
.insight-list summary i{color:#a6d2e4;border:1px solid #6d9bb35e;border-radius:50%;width:38px;height:38px;display:grid;place-items:center}
.insight-list details[open]{background:#83b8d209}.insight-list details[open] summary h3{color:#bce9f7}
.insight-content{margin-left:180px;padding:0 25px 36px 0}.insight-content p{font-size:17px;line-height:1.95;color:#c4d5df}.insight-content ul{font-size:16px;line-height:2;color:#b6cddc}
#sources .sources-layout p,#sources .sources-layout a{font-size:14px;line-height:1.9}#sources .sources-layout h3{font-size:18px}footer{font-size:13px}

/* A moving conveyor of real chapter links, draggable and keyboard reachable. */
.ex-marquee{display:block;position:relative;padding:0;background:#182f40;color:#dfedf2;border-block:1px solid #92bdcc4f;overflow:hidden;isolation:isolate}
.ex-marquee:before{content:"";position:absolute;inset:0;background:repeating-linear-gradient(90deg,transparent 0 39px,#a3c5d823 40px 41px,transparent 42px 80px);mask-image:linear-gradient(transparent 70%,#000);pointer-events:none}
.ex-marquee:after{content:"";position:absolute;inset:0;pointer-events:none;background:linear-gradient(90deg,#182f40,transparent 7%,transparent 89%,#182f40);z-index:2}
.ribbon-viewport{width:100%;overflow:hidden;cursor:grab;touch-action:pan-y}.ribbon-viewport.is-dragging{cursor:grabbing}
.ribbon-track{display:flex;width:max-content;will-change:transform;gap:0}
.ribbon-set{display:flex;gap:0;flex-shrink:0}
.ex-marquee .ribbon-item{display:flex;align-items:center;gap:36px;padding:30px 34px;min-height:150px;flex-shrink:0;text-decoration:none;color:#d9e9ef;user-select:none;position:relative;transition:color .3s,background .3s}
.ex-marquee .ribbon-item span{display:block;animation:none;font:600 clamp(29px,3.4vw,54px)/1.1 Bahnschrift,"Microsoft YaHei",sans-serif;letter-spacing:-.025em}
.ex-marquee .ribbon-item small{display:block;font:12px Bahnschrift,monospace;letter-spacing:.18em;color:#b3cdda;margin-top:12px}
.ex-marquee .ribbon-item b{font-size:40px;font-weight:300;transition:transform .6s;color:#86b9d0}
.ex-marquee .ribbon-item:hover,.ex-marquee .ribbon-item:focus-visible{color:#f3fafc;background:#79b4ca12}.ex-marquee .ribbon-item:hover b{transform:rotate(90deg)}
.ribbon-play{position:absolute;z-index:4;right:18px;top:12px;min-height:36px;padding:7px 12px;border:1px solid #a8cbda66;background:#182f40;color:#d9edf5;border-radius:20px;font-size:11px;cursor:pointer}
.ribbon-play:focus-visible{outline-color:#c1e9f5}.ribbon-caption{position:absolute;right:20px;bottom:10px;z-index:4;font:10px Bahnschrift,sans-serif;letter-spacing:.1em;color:#b6cfdd;pointer-events:none}

/* Scroll position as an instrument, with direct chapter access. */
.page-rail{--page-progress:0;right:14px;top:50%;transform:translateY(-50%);width:67px;padding:14px 5px 14px 18px;background:#102637ec;color:#d9ecf5;border:1px solid #a2c9dc45;border-radius:8px;backdrop-filter:blur(16px);box-shadow:0 10px 35px #0215231a;transition:opacity .3s,transform .3s;max-height:90svh;gap:0}
body.is-showroom .page-rail{transform:translateY(-50%)}body.is-showroom.ex-in-view .page-rail{transform:translate(25px,-50%)}
.rail-meter{font:400 20px Bahnschrift,monospace;letter-spacing:-.06em;text-align:center;color:#d4eef9;padding:0 0 13px;margin:0;border-bottom:1px solid #b1d0e331;margin-bottom:8px}.rail-meter small{font-size:9px;margin-left:2px;letter-spacing:0;color:#aac8d9}
.rail-scrub{position:absolute;top:56px;bottom:17px;left:5px;width:11px;display:flex;align-items:center}
.rail-scrub:before{content:"";position:absolute;inset:0 4px;background:#60809b50;border-radius:4px}
.rail-scrub:after{content:"";position:absolute;top:0;left:4px;width:3px;height:calc(var(--page-progress) * 100%);background:linear-gradient(#a7d7e6,#5cadcc);box-shadow:0 0 12px #87cce680;pointer-events:none}
.rail-scrub input{position:absolute;inset:0;margin:0;width:11px;height:100%;writing-mode:vertical-lr;direction:ltr;appearance:none;background:transparent;z-index:2;cursor:ns-resize;opacity:.3;transition:opacity .2s}.rail-scrub:hover input,.rail-scrub input:focus-visible{opacity:1}
.rail-scrub input::-webkit-slider-thumb{appearance:none;width:11px;height:7px;border-radius:2px;background:#def5fc;box-shadow:0 0 12px #9adaed}
.rail-scrub input::-moz-range-thumb{width:9px;height:6px;border:0;background:#def5fc;border-radius:2px}
.page-rail a{width:40px;height:28px;min-height:28px;position:relative;color:#adcadb;border-radius:3px;transition:background .2s,color .2s}
.page-rail a:before{content:attr(data-n);font:10px Bahnschrift,monospace;position:absolute;left:5px;color:inherit}
.page-rail i{position:absolute;right:6px;width:9px;height:1px!important;background:#89aabb!important;transition:width .3s,height .3s}
.page-rail a[aria-current="location"],.page-rail a.active{color:#e2f7fc;background:#599db72c}.page-rail a[aria-current="location"] i,.page-rail a.active i{width:14px;height:3px!important;background:#bcf0fa!important;box-shadow:0 0 13px #70c6e7}
.page-rail span{right:55px;bottom:auto;color:#e6f1f7;background:#133247;border-color:#8db3c862;font-size:13px;border-radius:4px;padding:10px 15px;box-shadow:0 8px 22px #07182930;transform:translateX(5px)}
.chapter-toggle{display:none}.page-rail a:focus-visible{outline:2px solid #b7e4f5;outline-offset:3px}
@media(min-width:761px){.ribbon-play,.ribbon-caption{right:100px}}
@media(min-width:1200px){.section,.precision-edition,.media-edition,#east.global-reach{padding-right:max(var(--pad),100px)}}
@media(max-width:1100px){#applicationPanel{grid-template-columns:minmax(0,1fr)}#applicationPanel img{height:180px;max-width:300px;justify-self:center}.application-menu button{padding-left:28px}.application-menu button[aria-selected=true]{padding-left:28px}.insight-content{margin-left:160px}.page-rail{right:6px;width:51px;padding-left:12px}.page-rail a{width:30px}.page-rail a:before{font-size:9px;left:2px}.page-rail i{right:2px;width:6px}.page-rail span{right:42px}.rail-scrub{left:2px;width:8px}}
@media(max-width:760px){
 .section-heading>p{font-size:15px}.source,.footnote{font-size:13px}.section-index{font-size:12px}#profile .intro-layout h2{font-size:39px}#profile .intro-right p:not(.large-copy){font-size:15px}.metrics{margin-top:32px}.metrics>div{min-height:125px}.metrics strong{font-size:39px}.metrics span{font-size:12px}.metrics strong small{font-size:11px}.metric-source{font-size:13px}
 .application-layout{grid-template-columns:1fr;gap:25px}.application-menu{grid-template-columns:1fr 1fr;gap:0 12px}.application-menu button{padding:19px 12px 16px;min-height:115px}.application-menu button:before{position:static;display:block;margin-bottom:9px;font-size:10px}.application-menu button strong{font-size:17px}.application-menu button span{font-size:12px}.application-menu button[aria-selected=true]{padding-left:12px}#applicationPanel{padding:24px;display:block}#applicationPanel h3{font-size:26px}#applicationPanel p{font-size:15px}#applicationPanel ul{font-size:14px}#applicationPanel img{width:100%;max-width:240px;height:180px;margin:25px auto;display:block}#applicationPanel .application-fit{font-size:13px}
 .insight-list summary{padding:24px 12px;grid-template-columns:1fr 30px}.insight-list summary>span{font-size:12px}.insight-list summary h3{font-size:23px}.insight-list summary i{width:30px;height:30px;font-size:19px}.insight-content{margin-left:0;padding:0 12px 26px;gap:18px}.insight-content p{font-size:15px}.insight-content ul{font-size:14px}
 .ex-marquee .ribbon-item{min-height:120px;padding:25px 23px;gap:24px}.ex-marquee .ribbon-item span{font-size:32px}.ex-marquee .ribbon-item small{font-size:10px;margin-top:9px}.ex-marquee .ribbon-item b{font-size:29px}.ribbon-play{font-size:10px;right:12px;top:8px;min-height:32px;padding:6px 10px}.ribbon-caption{font-size:8px;bottom:7px;right:14px}
 .chapter-toggle{display:flex;position:fixed;right:14px;bottom:16px;z-index:28;gap:12px;align-items:center;min-height:42px;padding:10px 16px;border:1px solid #b4d2e466;background:#102c3e;color:#dfedf5;border-radius:24px;font-size:12px;box-shadow:0 5px 20px #06182730;transition:opacity .3s;backdrop-filter:blur(16px)}
 .chapter-toggle small{font:11px Bahnschrift,monospace;color:#a5d4e6}body.ex-in-view .chapter-toggle{opacity:0;pointer-events:none}
 .page-rail{display:none;position:fixed;right:14px;bottom:70px;top:auto;width:208px;max-height:70svh;overflow-y:auto;transform:none!important;padding:16px;background:#102b3ff5}
 .page-rail.is-open{display:flex;opacity:1!important;visibility:visible!important;pointer-events:auto!important}.page-rail .rail-meter{text-align:left;font-size:22px;padding-left:5px}.rail-scrub{display:none}.page-rail a{width:100%;height:36px;min-height:36px;justify-content:start}.page-rail a:before{left:7px;font-size:11px}.page-rail a span{position:static;display:block;opacity:1;transform:none;color:#d7e9f3;background:transparent;border:0;box-shadow:none;font-size:13px;padding:0;margin-left:35px;pointer-events:none}.page-rail i{right:9px}.page-rail a[aria-current="location"]{background:#5fa7c02b}
}
body.reduce-motion .ribbon-track{will-change:auto}body.reduce-motion .metrics strong{transform:none}
@media(max-width:360px){.metrics strong{font-size:34px}.metrics strong small{font-size:10px;margin-left:4px}.metrics span{font-size:11px}.ribbon-caption{right:14px}}
@media(prefers-reduced-motion:reduce){.ribbon-track{will-change:auto}.metrics strong{transform:none!important}}
@media print{.ex-marquee,.page-rail,.chapter-toggle{display:none!important}#insight{background:#e7ecee!important;color:#172a38!important}#insight h2,#insight h3,#insight p,#insight li{color:#172a38!important}}