/* Looking Beyond — site styles */
:root {
  --bg: #06071a;
  --bg2: #0b0d26;
  --ink: #e9ecff;
  --ink-soft: #aab1d6;
  --ink-dim: #7a81a8;
  --line: rgba(160, 170, 255, .14);
  --glass: rgba(20, 24, 60, .55);
  --paper: #f6f4ee;
  --paper-ink: #1d2035;
  --gold: #ffd77a;
  --violet: #9b8cff;
  --cyan: #6fe3ff;
  --rose: #ff8fb8;
  --serif: "Fraunces", "Iowan Old Style", Georgia, serif;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, Menlo, monospace;
  --measure: 690px;
  --wide: 980px;
  --ease: cubic-bezier(.2, .8, .2, 1);
  --hue: 250;
  color-scheme: dark;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 400 18px/1.72 var(--sans); overflow-x: hidden;
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}
img, svg { max-width: 100%; }
a { color: inherit; }
::selection { background: hsla(var(--hue), 90%, 70%, .35); }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.skip { position: fixed; left: 12px; top: -60px; z-index: 100; background: var(--gold); color: #000; padding: 8px 14px; border-radius: 8px; }
.skip:focus { top: 12px; }

/* ---------- progress, spotlight, topbar ---------- */
#progress { position: fixed; inset: 0 0 auto 0; height: 3px; z-index: 60; background: transparent; }
#progress i { display: block; height: 100%; width: 100%; transform-origin: 0 50%; transform: scaleX(0);
  background: linear-gradient(90deg, var(--cyan), var(--violet), var(--rose), var(--gold)); box-shadow: 0 0 12px rgba(155,140,255,.8); }
#spotlight { position: fixed; inset: 0; pointer-events: none; z-index: 1;
  background: radial-gradient(600px circle at var(--mx, 50%) var(--my, 30%), hsla(var(--hue), 90%, 65%, .07), transparent 60%); transition: background .2s; }
#topbar { position: fixed; top: 0; left: 0; right: 0; z-index: 50; display: flex; align-items: center; gap: 16px;
  padding: 12px 20px; transition: background .4s, backdrop-filter .4s, transform .4s var(--ease); }
#topbar.solid { background: rgba(6, 7, 26, .72); backdrop-filter: blur(14px) saturate(140%); -webkit-backdrop-filter: blur(14px) saturate(140%); border-bottom: 1px solid var(--line); }
#topbar.hide { transform: translateY(-100%); }
.brand { display: flex; gap: 10px; align-items: center; text-decoration: none; font: 600 15px var(--serif); letter-spacing: .02em; color: var(--gold); }
.brand span { color: var(--ink); }
#now-reading { flex: 1; text-align: center; font: 500 13px var(--sans); color: var(--ink-soft); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; opacity: 0; transition: opacity .4s; }
#topbar.solid #now-reading { opacity: 1; }
.top-actions { display: flex; gap: 8px; align-items: center; margin-left: auto; }
.icon-btn, .menu-btn { background: var(--glass); border: 1px solid var(--line); color: var(--ink); border-radius: 999px; cursor: pointer; height: 38px; }
.icon-btn { width: 38px; font-size: 15px; }
.icon-btn[aria-pressed="true"] { color: var(--gold); border-color: var(--gold); }
.menu-btn { display: flex; align-items: center; gap: 8px; padding: 0 14px 0 12px; position: relative; }
.menu-btn span { display: block; width: 14px; height: 1.5px; background: currentColor; position: absolute; left: 13px; transition: transform .3s var(--ease), opacity .3s; }
.menu-btn span:nth-child(1) { top: 13px; } .menu-btn span:nth-child(2) { top: 18px; } .menu-btn span:nth-child(3) { top: 23px; }
.menu-btn b { font: 600 13px var(--sans); margin-left: 22px; }
.menu-btn[aria-expanded="true"] span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.menu-btn[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-btn[aria-expanded="true"] span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

/* ---------- drawer ---------- */
#scrim { position: fixed; inset: 0; background: rgba(3, 3, 12, .6); backdrop-filter: blur(3px); z-index: 54; opacity: 0; transition: opacity .35s; }
#scrim.on { opacity: 1; }
#drawer { position: fixed; top: 0; right: 0; bottom: 0; width: min(440px, 92vw); z-index: 55; background: linear-gradient(160deg, #10133a, #090a20 70%);
  border-left: 1px solid var(--line); transform: translateX(105%); transition: transform .45s var(--ease); overflow-y: auto; overscroll-behavior: contain; }
#drawer.open { transform: none; }
.drawer-inner { padding: 78px 26px 40px; }
.drawer-k { font: 600 11px var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--ink-dim); margin: 0 0 14px; }
.toc { list-style: none; padding: 0; margin: 0; }
.toc > li { border-top: 1px solid var(--line); }
.toc > li > a { display: flex; gap: 14px; align-items: baseline; padding: 13px 4px; text-decoration: none; transition: color .2s, padding .3s var(--ease); }
.toc > li > a:hover, .toc > li > a.active { color: hsl(var(--hue) 90% 78%); padding-left: 10px; }
.toc .n { font: 600 13px var(--mono); color: hsl(var(--hue) 80% 70%); min-width: 26px; }
.toc .t { font: 500 17px/1.3 var(--serif); }
.toc .t small { display: block; font: 600 10.5px var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--ink-dim); margin-bottom: 2px; }
.toc ul { list-style: none; margin: 0 0 10px 44px; padding: 0; display: none; }
.toc > li.active ul, .toc > li:hover ul { display: block; }
.toc ul a { display: block; font-size: 13.5px; color: var(--ink-soft); text-decoration: none; padding: 3px 0; }
.toc ul a:hover { color: var(--ink); }
.drawer-sources { display: inline-block; margin-top: 18px; color: var(--gold); font-weight: 600; text-decoration: none; }

/* ---------- side rail ---------- */
#rail { position: fixed; right: 18px; top: 50%; transform: translateY(-50%); z-index: 40; display: flex; flex-direction: column; gap: 10px; opacity: 0; transition: opacity .5s; }
#rail.on { opacity: 1; }
#rail a { position: relative; display: block; width: 18px; height: 18px; }
#rail i { position: absolute; inset: 6px; border-radius: 50%; background: var(--ink-dim); transition: transform .3s var(--ease), background .3s, box-shadow .3s; }
#rail a.done i { background: hsl(var(--hue) 70% 60%); }
#rail a.active i { transform: scale(1.9); background: hsl(var(--hue) 90% 70%); box-shadow: 0 0 14px hsl(var(--hue) 90% 65%); }
#rail span { position: absolute; right: 28px; top: 50%; transform: translate(8px, -50%); white-space: nowrap; pointer-events: none; opacity: 0; transition: .25s var(--ease);
  background: rgba(12, 14, 40, .92); border: 1px solid var(--line); padding: 6px 12px; border-radius: 10px; font: 600 10.5px var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--ink-dim); }
#rail span b { display: block; font: 500 14px var(--serif); letter-spacing: 0; text-transform: none; color: var(--ink); }
#rail a:hover span, #rail a:focus-visible span { opacity: 1; transform: translate(0, -50%); }
@media (max-width: 1100px) { #rail { display: none; } }

/* ---------- hero ---------- */
#hero { position: relative; min-height: 100svh; display: grid; place-items: center; overflow: hidden; isolation: isolate;
  background: radial-gradient(ellipse at 70% 20%, rgba(120, 80, 255, .25), transparent 55%), radial-gradient(ellipse at 20% 80%, rgba(40, 180, 255, .18), transparent 55%), var(--bg); }
#stars, #footer-stars { position: absolute; inset: 0; width: 100%; height: 100%; z-index: -1; }
.hero-inner { text-align: center; padding: 100px 20px 80px; max-width: 980px; }
.eyebrow { font: 600 12px var(--mono); letter-spacing: .32em; text-transform: uppercase; color: var(--cyan); margin: 0 0 22px; opacity: 0; animation: rise 1.2s .2s var(--ease) forwards; }
.hero-title { font: 300 clamp(58px, 13vw, 168px)/.92 var(--serif); letter-spacing: -.035em; margin: 0; font-variation-settings: "opsz" 144; }
.hero-title [data-l] { display: inline-block; }
.hero-title .ch { display: inline-block; opacity: 0; transform: translateY(.5em) rotate(6deg); filter: blur(8px); animation: letter 1.1s var(--ease) forwards; }
.hero-title [data-l]:last-child { font-style: italic; font-weight: 500; background: linear-gradient(100deg, var(--gold), var(--rose) 45%, var(--violet) 75%, var(--cyan)); -webkit-background-clip: text; background-clip: text; color: transparent; background-size: 200% 100%; animation: shimmer 9s linear infinite; }
.hero-title [data-l]:last-child .ch { color: transparent; background: inherit; -webkit-background-clip: text; background-clip: text; background-size: 600% 100%; }
.hero-sub { display: flex; flex-direction: column; align-items: center; gap: 10px; margin: 30px 0 0; opacity: 0; animation: rise 1.3s 1.15s var(--ease) forwards; }
.hero-sub .toe { font: italic 400 clamp(22px, 3vw, 32px)/1.2 var(--serif); color: #fff; letter-spacing: .01em; }
.hero-sub .toe::before, .hero-sub .toe::after { content: ""; display: inline-block; width: 46px; height: 1px; vertical-align: middle; margin: 0 16px; background: linear-gradient(90deg, transparent, var(--gold)); }
.hero-sub .toe::after { background: linear-gradient(90deg, var(--gold), transparent); }
.hero-sub .by::before, .hero-sub .by::after { content: ""; display: inline-block; width: 40px; height: 1px; vertical-align: middle; margin: 0 14px; background: linear-gradient(90deg, transparent, var(--gold)); }
.hero-sub .by::after { background: linear-gradient(90deg, var(--gold), transparent); }
.hero-sub .by { font: 600 13px var(--mono); letter-spacing: .3em; text-transform: uppercase; color: var(--gold); }
@media (max-width: 600px) { .hero-sub .toe::before, .hero-sub .toe::after { width: 18px; margin: 0 8px; } }
.hero-q { font: 400 clamp(20px, 2.6vw, 28px)/1.45 var(--serif); color: var(--ink-soft); margin: 30px 0 34px; opacity: 0; animation: rise 1.4s 1.6s var(--ease) forwards; }
.hero-q em { color: var(--ink); font-style: italic; }
.hero-cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; opacity: 0; animation: rise 1.2s 1.9s var(--ease) forwards; }
.hero-tiers { list-style: none; padding: 0; margin: 40px 0 0; display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; opacity: 0; animation: rise 1.2s 2.1s var(--ease) forwards; }
.hero-by { position: absolute; left: 22px; bottom: 18px; margin: 0; font: 500 12px var(--mono); color: var(--ink-dim); letter-spacing: .08em; }
.scroll-hint { position: absolute; bottom: 26px; left: 50%; width: 24px; height: 40px; margin-left: -12px; border: 1.5px solid var(--ink-dim); border-radius: 14px; opacity: 0; animation: rise 1s 2.6s forwards; }
.scroll-hint i { position: absolute; left: 50%; top: 8px; width: 3px; height: 8px; margin-left: -1.5px; border-radius: 2px; background: var(--ink); animation: wheel 1.8s infinite; }
@keyframes wheel { 0% { opacity: 0; transform: translateY(0); } 30% { opacity: 1; } 100% { opacity: 0; transform: translateY(14px); } }
@keyframes rise { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: none; } }
@keyframes letter { to { opacity: 1; transform: none; filter: none; } }
@keyframes shimmer { to { background-position: 200% 0; } }

.btn { display: inline-flex; align-items: center; gap: 8px; border-radius: 999px; padding: 13px 24px; font: 600 15px var(--sans); text-decoration: none; cursor: pointer; border: 1px solid transparent; transition: transform .25s var(--ease), box-shadow .25s, background .25s; }
.btn.primary { color: #0b0b1e; background: linear-gradient(120deg, var(--gold), #ffb08a); box-shadow: 0 10px 40px -10px rgba(255, 200, 120, .7); }
.btn.primary:hover { transform: translateY(-2px); box-shadow: 0 16px 50px -10px rgba(255, 200, 120, .9); }
.btn.ghost { color: var(--ink); background: rgba(255, 255, 255, .04); border-color: var(--line); }
.btn.ghost:hover { background: rgba(255, 255, 255, .09); transform: translateY(-2px); }

/* ---------- tiers ---------- */
.tier { display: inline-block; font: 600 11px/1 var(--mono); letter-spacing: .08em; text-transform: uppercase; padding: 7px 10px; border-radius: 999px; border: 1px solid; white-space: nowrap; }
.t-est { color: #7cf0b5; border-color: rgba(124, 240, 181, .45); background: rgba(124, 240, 181, .08); }
.t-open { color: #7fd3ff; border-color: rgba(127, 211, 255, .45); background: rgba(127, 211, 255, .08); }
.t-spec { color: #ffc777; border-color: rgba(255, 199, 119, .45); background: rgba(255, 199, 119, .08); }
.t-phil { color: #d6a8ff; border-color: rgba(214, 168, 255, .45); background: rgba(214, 168, 255, .08); }

/* ---------- chapters ---------- */
.chapter { position: relative; padding: 0 20px 90px; isolation: isolate; }
.chapter::before { content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background: radial-gradient(900px 600px at 85% 0%, hsla(var(--hue), 90%, 55%, .16), transparent 70%), radial-gradient(700px 500px at 0% 30%, hsla(calc(var(--hue) + 60), 90%, 55%, .08), transparent 70%); }
.chapter + .chapter { border-top: 1px solid var(--line); }
.chapter-head { position: relative; max-width: var(--wide); margin: 0 auto; padding: 130px 0 40px; text-align: center; }
.chapter-num { position: absolute; left: 50%; top: 40px; transform: translateX(-50%); font: 800 clamp(140px, 26vw, 300px)/1 var(--serif); letter-spacing: -.05em;
  color: transparent; -webkit-text-stroke: 1.2px hsla(var(--hue), 90%, 75%, .28); pointer-events: none; z-index: -1; user-select: none; transition: transform 1.2s var(--ease); }
.chapter-label { font: 600 12px var(--mono); letter-spacing: .24em; text-transform: uppercase; color: hsl(var(--hue) 90% 75%); margin: 70px 0 16px; }
.chapter-label .dot { opacity: .5; } .chapter-label .mins { color: var(--ink-dim); }
.chapter-title { font: 400 clamp(38px, 6.4vw, 78px)/1.04 var(--serif); letter-spacing: -.025em; margin: 0 auto 44px; max-width: 900px; font-variation-settings: "opsz" 144; }
.split .w { display: inline-block; overflow: hidden; vertical-align: top; padding-bottom: .06em; }
.split .w > span { display: inline-block; transform: translateY(105%); transition: transform 1s var(--ease); }
.split.in .w > span { transform: none; }
.hero-art { border-radius: 22px; overflow: hidden; box-shadow: 0 40px 120px -40px hsla(var(--hue), 90%, 50%, .6), 0 0 0 1px var(--line); will-change: transform; }
.hero-art svg, .banner-art svg { display: block; width: 100%; height: auto; }
.hero-cap { font: italic 400 15px var(--serif); color: var(--ink-dim); margin: 14px 0 0; }

/* ---------- prose ---------- */
.prose { max-width: var(--measure); margin: 0 auto; position: relative; z-index: 2; }
.prose > p:first-child::first-letter { float: left; font: 500 4.6em/.82 var(--serif); padding: .06em .1em 0 0; color: hsl(var(--hue) 90% 76%); }
.prose p { margin: 0 0 1.25em; color: #d9ddf5; }
.prose strong { color: #fff; font-weight: 600; }
.prose em { font-family: var(--serif); font-style: italic; font-size: 1.04em; }
.prose h3 { position: relative; font: 500 clamp(26px, 3.4vw, 34px)/1.2 var(--serif); letter-spacing: -.01em; margin: 2.3em 0 .7em; color: #fff; }
.prose h3::after { content: ""; display: block; width: 48px; height: 2px; margin-top: 14px; background: linear-gradient(90deg, hsl(var(--hue) 90% 70%), transparent); }
.prose h3 .anchor { position: absolute; left: -1.1em; color: var(--ink-dim); text-decoration: none; opacity: 0; transition: opacity .2s; }
.prose h3:hover .anchor { opacity: 1; }
.prose h4 { font: 600 19px var(--serif); }
.prose ul, .prose ol { padding-left: 1.2em; margin: 0 0 1.4em; }
.prose li { margin: .45em 0; color: #d9ddf5; }
.prose li::marker { color: hsl(var(--hue) 90% 72%); }
.prose blockquote { margin: 2em -10px; padding: 8px 0 8px 26px; border-left: 3px solid hsl(var(--hue) 90% 70%); font: italic 400 1.25em/1.5 var(--serif); color: #fff; }
.prose hr { border: 0; height: 1px; background: var(--line); margin: 3em 0; }
.prose a { color: hsl(var(--hue) 95% 80%); text-decoration-color: hsla(var(--hue), 95%, 80%, .4); text-underline-offset: 3px; }
.prose a:hover { text-decoration-color: currentColor; }
.prose code { font: 14px var(--mono); background: rgba(255, 255, 255, .07); padding: 2px 6px; border-radius: 5px; }

/* tables */
.table-wrap { margin: 2em -40px; overflow-x: auto; border-radius: 16px; border: 1px solid var(--line); background: linear-gradient(180deg, rgba(25, 29, 70, .6), rgba(12, 14, 40, .6)); -webkit-overflow-scrolling: touch; }
table { width: 100%; border-collapse: collapse; font-size: 15px; line-height: 1.5; min-width: 560px; }
th { text-align: left; font: 600 11px var(--mono); letter-spacing: .1em; text-transform: uppercase; color: hsl(var(--hue) 90% 78%); padding: 16px 18px; border-bottom: 1px solid var(--line); background: rgba(255, 255, 255, .03); }
td { padding: 14px 18px; border-bottom: 1px solid rgba(160, 170, 255, .08); vertical-align: top; color: #d2d7f2; }
tr:last-child td { border-bottom: 0; }
tbody tr { transition: background .2s; }
tbody tr:hover { background: hsla(var(--hue), 80%, 60%, .07); }

/* figures */
figure { margin: 3em 0; }
.diagram { margin: 3.2em -80px; }
.diagram-art { background: var(--paper); color: var(--paper-ink); border-radius: 20px; padding: 18px; cursor: zoom-in; position: relative; overflow: hidden;
  box-shadow: 0 30px 80px -30px rgba(0, 0, 0, .8), 0 0 0 1px rgba(255, 255, 255, .08), 0 0 60px -20px hsla(var(--hue), 90%, 60%, .45); transition: transform .5s var(--ease), box-shadow .5s; }
.diagram-art:hover { transform: translateY(-4px); box-shadow: 0 40px 90px -30px rgba(0, 0, 0, .9), 0 0 0 1px rgba(255, 255, 255, .12), 0 0 80px -16px hsla(var(--hue), 90%, 60%, .6); }
.diagram-art::after { content: "⤢"; position: absolute; top: 10px; right: 14px; font-size: 16px; color: rgba(0, 0, 0, .35); opacity: 0; transition: opacity .3s; }
.diagram-art:hover::after { opacity: 1; }
.diagram-art svg { display: block; width: 100%; height: auto; }
.diagram[data-orbit] .diagram-art { background: transparent; padding: 0; }
figcaption { font: 400 14.5px/1.5 var(--sans); color: var(--ink-dim); margin-top: 14px; text-align: center; }
.fig-n { font: 600 11px var(--mono); letter-spacing: .12em; text-transform: uppercase; color: hsl(var(--hue) 90% 74%); margin-right: 6px; }
.banner { margin: 3.4em -140px; }
.banner-art { border-radius: 22px; overflow: hidden; box-shadow: 0 30px 100px -40px hsla(var(--hue), 90%, 50%, .7); }
.banner figcaption { font: italic 15px var(--serif); }
@media (max-width: 1060px) { .banner { margin-left: -20px; margin-right: -20px; } .diagram { margin-left: -12px; margin-right: -12px; } .table-wrap { margin-left: -8px; margin-right: -8px; } }
@media (max-width: 600px) { .banner-art, .hero-art { border-radius: 14px; } .diagram-art { padding: 8px; border-radius: 14px; } body { font-size: 17px; } }

/* reveal */
.reveal { opacity: 0; transform: translateY(36px); transition: opacity 1s var(--ease), transform 1s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
.diagram.reveal { transform: translateY(40px) scale(.97); }
.diagram.reveal.in { transform: none; }

/* next chapter */
.next-chapter { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 4px 20px; max-width: var(--measure); margin: 70px auto 0; padding: 26px 30px; border-radius: 22px; text-decoration: none;
  background: linear-gradient(120deg, hsla(var(--hue), 80%, 50%, .18), rgba(255, 255, 255, .02)); border: 1px solid hsla(var(--hue), 90%, 70%, .3); transition: transform .4s var(--ease), box-shadow .4s; }
.next-chapter:hover { transform: translateY(-4px); box-shadow: 0 30px 70px -30px hsla(var(--hue), 90%, 60%, .7); }
.nc-k { font: 600 11px var(--mono); letter-spacing: .16em; text-transform: uppercase; color: hsl(var(--hue) 90% 76%); }
.nc-t { grid-column: 1; font: 400 26px/1.2 var(--serif); }
.nc-arrow { grid-row: 1 / 3; grid-column: 2; font-size: 30px; color: hsl(var(--hue) 90% 76%); transition: transform .4s var(--ease); }
.next-chapter:hover .nc-arrow { transform: translateX(8px); }

/* ---------- interactives ---------- */
.ix { margin: 3.4em -80px; border-radius: 24px; padding: 26px 28px 28px; position: relative; overflow: hidden;
  background: linear-gradient(160deg, rgba(30, 34, 84, .85), rgba(12, 13, 38, .9)); border: 1px solid hsla(var(--hue), 90%, 72%, .28);
  box-shadow: 0 40px 100px -50px hsla(var(--hue), 90%, 55%, .9), inset 0 1px 0 rgba(255, 255, 255, .06); }
.ix::before { content: ""; position: absolute; inset: -1px; border-radius: inherit; padding: 1px; pointer-events: none;
  background: conic-gradient(from var(--ang, 0deg), transparent 0 70%, hsla(var(--hue), 95%, 75%, .9) 80%, transparent 90%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); -webkit-mask-composite: xor; mask-composite: exclude; animation: spin-border 7s linear infinite; }
@property --ang { syntax: "<angle>"; inherits: false; initial-value: 0deg; }
@keyframes spin-border { to { --ang: 360deg; } }
@media (max-width: 1060px) { .ix { margin-left: -12px; margin-right: -12px; padding: 22px 18px; } }
.ix-head { margin-bottom: 16px; }
.ix-kicker { display: inline-flex; align-items: center; gap: 8px; font: 600 11px var(--mono); letter-spacing: .18em; text-transform: uppercase; color: hsl(var(--hue) 95% 78%); }
.ix-kicker::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: currentColor; box-shadow: 0 0 10px currentColor; animation: pulse 1.6s infinite; }
@keyframes pulse { 50% { opacity: .35; } }
.ix h4 { font: 400 clamp(22px, 2.6vw, 28px)/1.25 var(--serif); margin: 8px 0 0; color: #fff; }
.ix p { color: var(--ink-soft); font-size: 15.5px; margin: 0 0 12px; }
.ix canvas { display: block; width: 100%; border-radius: 14px; background: #04051a; touch-action: pan-y; }
.ix-row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin: 14px 0 0; }
.ix-note { font-size: 13.5px !important; color: var(--ink-dim) !important; margin-top: 12px !important; }
.chip { font: 600 13.5px var(--sans); color: var(--ink); background: rgba(255, 255, 255, .05); border: 1px solid var(--line); border-radius: 999px; padding: 9px 15px; cursor: pointer; transition: all .2s var(--ease); }
.chip:hover { background: rgba(255, 255, 255, .1); transform: translateY(-1px); }
.chip.on { background: hsl(var(--hue) 85% 68%); border-color: transparent; color: #0a0a20; box-shadow: 0 6px 24px -6px hsl(var(--hue) 90% 60%); }
.chip.gold { background: linear-gradient(120deg, var(--gold), #ffb08a); color: #111; border-color: transparent; }
input[type=range] { -webkit-appearance: none; appearance: none; width: 100%; height: 30px; background: transparent; cursor: pointer; }
input[type=range]::-webkit-slider-runnable-track { height: 6px; border-radius: 6px; background: linear-gradient(90deg, hsl(var(--hue) 90% 70%) var(--p, 50%), rgba(255, 255, 255, .12) var(--p, 50%)); }
input[type=range]::-moz-range-track { height: 6px; border-radius: 6px; background: rgba(255, 255, 255, .12); }
input[type=range]::-moz-range-progress { height: 6px; border-radius: 6px; background: hsl(var(--hue) 90% 70%); }
input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; width: 22px; height: 22px; border-radius: 50%; margin-top: -8px; background: #fff; box-shadow: 0 0 0 4px hsla(var(--hue), 90%, 70%, .35), 0 0 20px hsl(var(--hue) 90% 70%); }
input[type=range]::-moz-range-thumb { width: 22px; height: 22px; border: 0; border-radius: 50%; background: #fff; box-shadow: 0 0 0 4px hsla(var(--hue), 90%, 70%, .35), 0 0 20px hsl(var(--hue) 90% 70%); }
input[type=number] { font: 600 16px var(--mono); width: 110px; padding: 9px 12px; border-radius: 10px; border: 1px solid var(--line); background: rgba(0, 0, 0, .3); color: #fff; }
.readout { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 10px; margin-top: 14px; }
.stat { background: rgba(0, 0, 0, .25); border: 1px solid var(--line); border-radius: 14px; padding: 12px 14px; }
.stat small { display: block; font: 600 10.5px var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--ink-dim); }
.stat b { display: block; font: 500 24px/1.25 var(--serif); color: #fff; margin-top: 2px; }
.stat span { display: block; font-size: 13.5px; line-height: 1.45; color: var(--ink-soft); margin-top: 3px; }

/* where poll */
.where-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px; }
.where-card { text-align: left; cursor: pointer; border-radius: 16px; padding: 16px; border: 1px solid var(--line); background: rgba(255, 255, 255, .03); color: var(--ink); font: inherit; transition: all .3s var(--ease); }
.where-card:hover { transform: translateY(-3px); border-color: hsla(var(--hue), 90%, 70%, .6); }
.where-card .ico { font-size: 26px; display: block; margin-bottom: 6px; }
.where-card b { display: block; font: 500 17px/1.25 var(--serif); }
.where-card small { display: block; color: var(--ink-dim); font-size: 12.5px; line-height: 1.4; margin-top: 4px; }
.where-card.on { background: hsla(var(--hue), 80%, 60%, .2); border-color: hsl(var(--hue) 90% 72%); box-shadow: 0 0 40px -10px hsl(var(--hue) 90% 60%); }
.where-msg { margin-top: 14px; min-height: 1.5em; font: italic 17px/1.5 var(--serif); color: #fff; }

/* glove boxes */
.gloves { display: grid; grid-template-columns: 1fr auto 1fr; gap: 14px; align-items: center; }
.gbox { aspect-ratio: 1.15; border-radius: 18px; display: grid; place-items: center; text-align: center; position: relative; cursor: pointer; border: 1px solid var(--line);
  background: linear-gradient(160deg, #3a2a1a, #22180f); color: #f3e2c6; transition: transform .5s var(--ease); perspective: 600px; font: inherit; }
.gbox:disabled { cursor: default; }
.gbox .lid { font: 600 12px var(--mono); letter-spacing: .1em; text-transform: uppercase; opacity: .8; }
.gbox .glove { font-size: 54px; line-height: 1; transition: transform .6s var(--ease); }
.gbox .where { position: absolute; bottom: 10px; left: 0; right: 0; font: 600 11px var(--mono); letter-spacing: .12em; text-transform: uppercase; color: rgba(243, 226, 198, .55); }
.gbox.shake { animation: shake .5s; }
@keyframes shake { 20%, 60% { transform: rotate(-3deg); } 40%, 80% { transform: rotate(3deg); } }
.gline { width: 60px; height: 2px; background: repeating-linear-gradient(90deg, var(--gold) 0 6px, transparent 6px 12px); animation: dash 1s linear infinite; background-size: 24px 2px; }
@keyframes dash { to { background-position: 24px 0; } }
.flip { transform: scaleX(-1); display: inline-block; }

/* quiz */
.quiz-q { margin-bottom: 18px; }
.quiz-q > p { font: 500 18px/1.4 var(--serif) !important; color: #fff !important; margin-bottom: 10px !important; }
.quiz-opts { display: grid; gap: 8px; }
.quiz-opt { text-align: left; font: 500 15px var(--sans); color: var(--ink); background: rgba(255, 255, 255, .04); border: 1px solid var(--line); border-radius: 12px; padding: 11px 14px; cursor: pointer; transition: all .2s; }
.quiz-opt:hover:not(:disabled) { background: rgba(255, 255, 255, .09); }
.quiz-opt.right { background: rgba(80, 220, 150, .18); border-color: #6fe3a5; }
.quiz-opt.wrong { background: rgba(255, 100, 120, .14); border-color: #ff7a8e; }
.quiz-opt:disabled { cursor: default; }
.quiz-why { font-size: 14.5px !important; color: var(--ink-soft) !important; margin-top: 8px !important; animation: rise .5s var(--ease); }
.quiz-score { font: 500 20px var(--serif); color: var(--gold); }

/* calendar */
.cal-months { display: grid; grid-template-columns: repeat(12, 1fr); gap: 4px; margin: 6px 0 12px; }
.cal-m { height: 34px; border-radius: 6px; background: rgba(255, 255, 255, .05); position: relative; overflow: hidden; font: 600 9.5px var(--mono); color: var(--ink-dim); display: grid; place-items: end center; padding-bottom: 3px; }
.cal-m i { position: absolute; left: 0; top: 0; bottom: 0; background: linear-gradient(180deg, hsla(var(--hue), 90%, 70%, .6), hsla(var(--hue), 90%, 50%, .2)); }
.cal-m em { position: absolute; top: 5px; width: 5px; height: 5px; border-radius: 50%; background: var(--gold); box-shadow: 0 0 6px var(--gold); }
.cal-big { font: 400 clamp(26px, 4vw, 38px)/1.1 var(--serif); color: #fff; }
.cal-ev { min-height: 70px; margin-top: 10px; }
.cal-ev .e { animation: rise .5s var(--ease); }
.cal-ev b { color: var(--gold); font-weight: 600; }

/* sources */
.sources-list ul { list-style: none; padding: 0; display: grid; gap: 10px; }
.sources-list li { margin: 0; padding: 14px 18px; border-radius: 14px; background: rgba(255, 255, 255, .03); border: 1px solid var(--line); font-size: 15px; transition: transform .3s var(--ease), border-color .3s; }
.sources-list li:hover { transform: translateX(6px); border-color: hsla(var(--hue), 90%, 70%, .5); }
.link-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; margin: 1em -60px 0; }
@media (max-width: 1000px) { .link-cards { margin: 1em 0 0; } }
.link-card { display: flex; flex-direction: column; gap: 6px; padding: 18px; border-radius: 18px; text-decoration: none !important; color: var(--ink) !important;
  background: linear-gradient(160deg, rgba(40, 46, 110, .55), rgba(14, 16, 44, .7)); border: 1px solid var(--line); transition: transform .35s var(--ease), box-shadow .35s, border-color .35s; }
.link-card:hover { transform: translateY(-5px) rotate(-.4deg); border-color: hsla(var(--hue), 90%, 72%, .6); box-shadow: 0 24px 60px -24px hsla(var(--hue), 90%, 60%, .8); }
.link-card b { font: 500 18px/1.25 var(--serif); }
.link-card span { font-size: 14px; color: var(--ink-soft); line-height: 1.5; flex: 1; }
.link-card i { font: 600 11px var(--mono); font-style: normal; letter-spacing: .08em; color: hsl(var(--hue) 90% 76%); }

/* footer */
#footer { position: relative; overflow: hidden; isolation: isolate; text-align: center; padding: 140px 20px 70px; border-top: 1px solid var(--line);
  background: radial-gradient(ellipse at 50% 120%, rgba(110, 80, 255, .35), transparent 60%), var(--bg); }
.foot-big { font: 300 clamp(30px, 5vw, 58px)/1.15 var(--serif); max-width: 900px; margin: 0 auto 26px; letter-spacing: -.02em; }
.foot-big em { font-style: italic; color: var(--gold); }
.foot-small { color: var(--ink-dim); font-size: 14px; margin: 0 0 30px; }

/* lightbox + toast */
#lightbox { position: fixed; inset: 0; z-index: 90; background: rgba(3, 3, 14, .9); backdrop-filter: blur(10px); display: grid; place-items: center; padding: 30px; opacity: 0; transition: opacity .3s; }
#lightbox.on { opacity: 1; }
.lb-art { width: min(1300px, 96vw); max-height: 82vh; overflow: auto; background: var(--paper); border-radius: 20px; padding: 20px; transform: scale(.94); transition: transform .4s var(--ease); }
#lightbox.on .lb-art { transform: none; }
.lb-art svg { width: 100%; height: auto; display: block; }
.lb-cap { color: var(--ink-soft); text-align: center; margin: 14px 0 0; }
.lb-close { position: absolute; top: 18px; right: 22px; width: 44px; height: 44px; border-radius: 50%; font-size: 26px; background: rgba(255, 255, 255, .08); border: 1px solid var(--line); color: #fff; cursor: pointer; }
#toast { position: fixed; left: 50%; bottom: 26px; transform: translate(-50%, 30px); opacity: 0; z-index: 95; background: rgba(20, 22, 60, .95); border: 1px solid var(--line); padding: 12px 20px; border-radius: 999px; font: 500 14px var(--sans); transition: all .4s var(--ease); pointer-events: none; }
#toast.on { opacity: 1; transform: translate(-50%, 0); }

/* calm mode / reduced motion */
.calm *, .calm *::before, .calm *::after { animation-duration: .001s !important; animation-iteration-count: 1 !important; transition-duration: .001s !important; }
.calm .reveal { opacity: 1; transform: none; }
.calm .split .w > span { transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero-sub { animation: none; opacity: 1; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .split .w > span { transform: none; }
  .hero-title .ch, .eyebrow, .hero-q, .hero-cta, .hero-tiers { animation: none; opacity: 1; transform: none; filter: none; }
}
@media (max-width: 700px) {
  #topbar { padding: 10px 14px; } #now-reading { display: none; } .menu-btn b { display: none; } .menu-btn { width: 38px; padding: 0; }
  .chapter-head { padding-top: 90px; } .chapter-label { margin-top: 50px; }
  .gloves { grid-template-columns: 1fr 1fr; } .gline { display: none; }
  .scroll-hint { display: none; } .hero-by { left: 0; right: 0; text-align: center; }
}

/* Design tokens the diagrams were drawn with */
.diagram-art, .lb-art {
  --cds-text-primary: #1b1e33;
  --cds-text-secondary: #5b6080;
  --cds-chart-categorical-1: #6b5cf0;
  --cds-chart-categorical-2: #e0528a;
  --cds-chart-categorical-3: #169dc2;
  --cds-chart-axis: #8c90b0;
  --cds-chart-grid: #dedbe9;
  --cds-chart-reference-tint: #e9e5f6;
  --cds-chart-status-warning: #e39a2e;
}

.no-js .reveal, .no-js .split .w > span { opacity: 1; transform: none; }
.no-js .ix { display: none; }