@font-face{font-family:"Newsreader";font-style:normal;font-weight:200 800;font-display:swap;src:url(fonts/newsreader-latin.woff2) format("woff2");
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Newsreader";font-style:normal;font-weight:200 800;font-display:swap;src:url(fonts/newsreader-latin-ext.woff2) format("woff2");
  unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:"Newsreader";font-style:italic;font-weight:400;font-display:swap;src:url(fonts/newsreader-italic-400-latin.woff2) format("woff2");
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Newsreader";font-style:italic;font-weight:400;font-display:swap;src:url(fonts/newsreader-italic-400-latin-ext.woff2) format("woff2");
  unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:"Plex";font-style:normal;font-weight:400 600;font-display:swap;src:url(fonts/IBMPlexSans-latin.woff2) format("woff2");
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Plex";font-style:normal;font-weight:400 600;font-display:swap;src:url(fonts/IBMPlexSans-latin-ext.woff2) format("woff2");
  unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}

:root{
  --bg:#f3ede2;--surface:#fbf8f2;--ink:#14202b;--muted:#3a4652;--line:rgba(20,32,43,.16);--line-soft:rgba(20,32,43,.10);
  --accent:#0a5266;--old:#b23a0c;--now:#0a5f78;--chip:#e9e1d3;--focus:#0a5266;
  --stage:#0c1720;--stage-ink:#f2ece2;--stage-muted:#c9d3da;
  --serif:"Newsreader",Georgia,"Times New Roman",serif;--sans:"Plex",system-ui,-apple-system,"Segoe UI",sans-serif;
  --top:44px;--band:clamp(240px,46vh,560px);
  color-scheme:light;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#0b1620;--surface:#112230;--ink:#ece4d6;--muted:#bcc6cd;--line:rgba(236,228,214,.18);--line-soft:rgba(236,228,214,.10);
  --accent:#86d6ea;--old:#ff9a6e;--now:#86d6ea;--chip:#1a2c3b;--focus:#86d6ea;color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#0b1620;--surface:#112230;--ink:#ece4d6;--muted:#bcc6cd;--line:rgba(236,228,214,.18);--line-soft:rgba(236,228,214,.10);
  --accent:#86d6ea;--old:#ff9a6e;--now:#86d6ea;--chip:#1a2c3b;--focus:#86d6ea;color-scheme:dark}

*{box-sizing:border-box}
[hidden]{display:none!important}
svg[hidden]{display:none}
html{-webkit-text-size-adjust:100%;scroll-padding-top:calc(var(--top) + 12px)}
.step h2{scroll-margin-top:calc(var(--top) + var(--band) + 12px)}
body{margin:0;background:var(--bg);color:var(--ink);font:400 1.125rem/1.6 var(--serif);font-optical-sizing:auto}
a{color:var(--accent);text-underline-offset:.18em}
:focus-visible{outline:2px solid var(--focus);outline-offset:2px}
.skip-link{position:absolute;left:-9999px;top:0;z-index:50;background:var(--surface);color:var(--ink);padding:.5rem .8rem}
.skip-link:focus{left:.5rem;top:.5rem}
.num{font-variant-numeric:tabular-nums}
strong{font-weight:650}

/* top bar: slim, takes the stage colour so the band reads as one object */
.topbar{position:sticky;top:0;z-index:30;height:var(--top);display:flex;align-items:center;gap:.6rem;padding:0 max(12px,env(safe-area-inset-left));
  background:var(--stage);color:var(--stage-ink);font:500 .82rem/1 var(--sans)}
.brand{display:flex;align-items:center;gap:.45rem;color:inherit;text-decoration:none;font-weight:600;white-space:nowrap}
.brand-mark{width:22px;height:22px}
.topnav{display:flex;gap:1rem;margin-left:1rem}
.topnav a{color:var(--stage-muted);text-decoration:none}
.topnav a:hover,.topnav a[aria-current="true"]{color:var(--stage-ink)}
.spacer{flex:1}
.chips{display:flex;gap:.2rem}
.chip{display:inline-flex;align-items:center;justify-content:center;min-width:34px;min-height:34px;padding:0 .35rem;border-radius:6px;color:var(--stage-muted);text-decoration:none;font-size:.74rem;letter-spacing:.04em}
.chip[aria-current="page"]{color:var(--stage-ink);box-shadow:inset 0 -2px 0 var(--stage-ink)}
.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border:0;background:none;color:var(--stage-ink);border-radius:8px;cursor:pointer}
.icon-btn .i-moon{display:none}
:root[data-theme="dark"] .icon-btn .i-sun{display:none}:root[data-theme="dark"] .icon-btn .i-moon{display:block}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .icon-btn .i-sun{display:none}:root:not([data-theme="light"]) .icon-btn .i-moon{display:block}}
@media (max-width:760px){.topnav{display:none}.brand span{display:none}}
.progress{position:fixed;left:0;right:0;top:var(--top);height:2px;z-index:31;pointer-events:none}
.progress i{display:block;height:100%;width:100%;background:var(--now);transform-origin:0 50%;transform:scaleX(0)}

/* the band: the coast, sticky under the top bar */
.stage{position:sticky;top:var(--top);z-index:5;height:var(--band);background:var(--stage);overflow:hidden}
.stage .coast,.stage .still{position:absolute;inset:0;width:100%;height:100%;display:block}
.stage .still{object-fit:cover}
.stage.live .still{opacity:0;transition:opacity .4s}
.stage-year{position:absolute;left:10px;top:8px;margin:0;padding:.35rem .55rem;border-radius:8px;background:rgba(8,16,24,.72);color:var(--stage-ink);font:600 clamp(1.4rem,3.2vw,2.4rem)/1 var(--sans);letter-spacing:-.01em;text-shadow:0 1px 6px rgba(0,0,0,.7)}
.stage-year small{display:block;font:500 .74rem/1.3 var(--sans);letter-spacing:0;color:var(--stage-muted);margin-top:.25rem}
.stage-legend,.ex-legend{position:absolute;right:12px;top:10px;display:flex;flex-direction:column;gap:.25rem;padding:.4rem .55rem;border-radius:8px;
  background:rgba(8,16,24,.72);color:var(--stage-ink);font:500 .76rem/1.25 var(--sans)}
.stage-legend span,.ex-legend span{display:flex;align-items:center;gap:.45rem}
.stage-legend b,.ex-legend b{font-weight:500}
.k-old,.k-now,.k-oth{display:inline-block;width:18px;height:3px;border-radius:2px}
.k-old{background:#ff6b3d}.k-now{background:#6fe3ff}.k-oth{background:rgba(255,255,255,.55);height:1.5px}
.stage::after{content:"";position:absolute;left:0;right:0;bottom:0;height:18px;background:linear-gradient(to bottom,rgba(0,0,0,0),rgba(0,0,0,.25));pointer-events:none}
@media (max-width:760px){:root{--band:min(40svh,64vw)}.stage-legend,.ex-legend{right:8px;top:8px;font-size:.68rem;padding:.3rem .45rem}.explore .coast{height:min(44svh,72vw)}}

/* the story under the band */
.steps{list-style:none;margin:0;padding:0 16px}
.step{min-height:calc(100svh - var(--top) - var(--band) + 30px);display:flex;align-items:flex-start;padding:28px 0 12vh}
.step-card,.hero-card{max-width:640px;margin:0 auto;width:100%}
.hero{min-height:calc(100svh - var(--top) - var(--band));padding-top:22px}
.kicker{font:600 .78rem/1.3 var(--sans);letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin:0 0 .5rem}
h1{font:600 clamp(2rem,5.2vw,3.4rem)/1.05 var(--serif);letter-spacing:-.015em;margin:0 0 .8rem;font-variation-settings:"opsz" 72}
.deck{font-size:clamp(1.12rem,2.2vw,1.32rem);line-height:1.5;margin:0 0 1rem}
.scroll-cue{font:500 .86rem/1.4 var(--sans);color:var(--muted)}
.scroll-cue::before{content:"↓ ";}
h2{font:600 clamp(1.45rem,3vw,1.95rem)/1.15 var(--serif);margin:0 0 .7rem;letter-spacing:-.01em;font-variation-settings:"opsz" 48}
.step p,.prose p{margin:0 0 1rem}
.anchor{margin-left:.35em;color:var(--muted);text-decoration:none;opacity:0;font:500 .8em var(--sans)}
h2:hover .anchor,.anchor:focus-visible{opacity:1}

/* chart in the 2010 step */
.chart{margin:1.2rem 0 0;padding:0}
.chart svg{width:100%;height:auto;display:block;font:500 11px var(--sans)}
.chart .g{stroke:var(--line-soft)}.chart .ax{fill:var(--muted)}
.chart .ln{fill:none;stroke:var(--now);stroke-width:2.4}
.chart .d{fill:var(--now)}.chart .hi{fill:var(--old)}
.chart .ref{stroke:var(--old);stroke-dasharray:4 4;stroke-width:1.2}.chart .ref-t{fill:var(--old)}
.chart figcaption{font:500 .82rem/1.4 var(--sans);color:var(--muted);margin-top:.3rem}

/* explorer */
.explore{padding:56px 0 24px;border-top:1px solid var(--line)}
.explore-head{max-width:640px;margin:0 auto;padding:0 16px}
.explore-stage{position:relative;margin:14px 0 0;background:var(--stage)}
.explore .coast{display:block;width:100%;height:clamp(260px,52vh,620px);touch-action:pan-y;cursor:grab}
.explore .coast.dragging{cursor:grabbing}
.explore .mini{display:block;width:100%;height:46px;cursor:pointer;border-top:1px solid rgba(255,255,255,.15)}
.ex-whole{position:absolute;left:12px;bottom:60px}
.ex-readout{position:absolute;left:12px;top:10px;max-width:min(360px,calc(100% - 190px));margin:0;padding:.45rem .65rem;border-radius:8px;background:rgba(8,16,24,.82);color:#f2ece2;font:500 .82rem/1.35 var(--sans)}
.ex-readout b{display:block;font:650 1rem/1.2 var(--serif);margin-bottom:.15rem}
@media (max-width:760px){.ex-readout{top:auto;bottom:56px;left:8px;max-width:calc(100% - 16px);font-size:.74rem}.ex-whole{bottom:auto;top:8px;left:8px}}
.ex-controls{max-width:960px;margin:12px auto 0;padding:0 16px;display:flex;flex-wrap:wrap;align-items:center;gap:.6rem 1rem;font:500 .9rem/1.3 var(--sans)}
.ex-controls input[type=range]{flex:1 1 260px;min-width:180px;accent-color:var(--now);height:44px}
.ylab b{font-size:1.25rem;margin-left:.3rem}
.flown{flex-basis:100%;margin:0;color:var(--muted);font-size:.84rem;min-height:1.2em}
.bchips{max-width:960px;margin:12px auto 0;padding:0 16px;display:flex;flex-wrap:wrap;gap:.4rem}
.bchip{font:500 .86rem/1 var(--sans);min-height:40px;padding:0 .8rem;border-radius:20px;border:1px solid var(--line);background:var(--surface);color:var(--ink);cursor:pointer}
.bchip[aria-pressed="true"]{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.bcard{max-width:640px;margin:18px auto 0;padding:18px 16px;border-top:2px solid var(--now)}
.bcard h3{font:600 1.6rem/1.15 var(--serif);margin:.2rem 0 .4rem}
.b-now{font:600 1.1rem/1.4 var(--sans);margin:0 0 .4rem}
.b-facts{margin:0 0 .6rem}
.spark{width:100%;height:auto;display:block;font:500 10px var(--sans);margin:.4rem 0 .8rem}
.spark .ln{fill:none;stroke:var(--now);stroke-width:2}.spark .d{fill:var(--now)}.spark .cur{fill:var(--old)}.spark .ax{fill:var(--muted)}.spark .g{stroke:var(--line-soft)}
.credit{max-width:960px;margin:14px auto 0;padding:0 16px;font:400 .78rem/1.4 var(--sans);color:var(--muted)}

.btn{font:500 .9rem/1 var(--sans);min-height:44px;padding:0 1rem;border-radius:22px;border:1px solid var(--line);background:var(--surface);color:var(--ink);cursor:pointer}
.btn.primary{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.btn.whole{background:rgba(8,16,24,.82);color:#f2ece2;border-color:rgba(255,255,255,.3)}
.bcard .btn.whole{background:var(--surface);color:var(--ink);border-color:var(--line);float:right}

/* after the story */
.after{border-top:1px solid var(--line);margin-top:24px}
.prose{max-width:680px;margin:0 auto;padding:36px 16px 24px}
.block{margin:0 0 2.4rem}
.btable{width:100%;border-collapse:collapse;font:400 .92rem/1.35 var(--sans);margin:0 0 2.4rem}
.btable th,.btable td{text-align:left;padding:.5rem .4rem;border-bottom:1px solid var(--line-soft);vertical-align:top}
.btable thead th{font-weight:600;color:var(--muted);font-size:.8rem}
.sources{padding-left:1.1rem;font:400 .9rem/1.45 var(--sans)}
.sources li{margin:0 0 .55rem}
.share{margin:1.6rem 0 0}
.share-row{display:flex;align-items:center;gap:.4rem;flex-wrap:wrap}
.share-label{font:500 .84rem var(--sans);color:var(--muted);margin-right:.2rem}
.ic{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:50%;border:1px solid var(--line-soft);background:transparent;color:var(--ink);cursor:pointer}
.ic:hover,.ic:focus-visible{color:var(--accent);border-color:var(--accent)}
@media (pointer:coarse){.ic{width:44px;height:44px}}
.share-msg{font:500 .82rem var(--sans);color:var(--muted);min-height:1em;margin:.3rem 0 0}
.site-footer{max-width:680px;margin:0 auto;padding:18px 16px 60px;display:flex;flex-wrap:wrap;gap:.4rem 1.2rem;font:400 .84rem var(--sans);color:var(--muted)}

/* reading rail: hairline dots at the far right, only where a gutter exists */
.rail{position:fixed;right:10px;top:50%;transform:translateY(-50%);z-index:20;display:flex;flex-direction:column;gap:2px;opacity:0;transition:opacity .4s;pointer-events:none}
.rail.on{opacity:1;pointer-events:auto}
.rail-dot{display:flex;align-items:center;justify-content:flex-end;gap:.5rem;height:22px;color:var(--muted);text-decoration:none;font:500 .74rem var(--sans)}
.rail-dot .dot{width:6px;height:6px;border-radius:50%;background:var(--line)}
.rail-dot[aria-current="true"] .dot{background:var(--now);transform:scale(1.4)}
.rail-label{opacity:0;transition:opacity .2s;background:var(--surface);padding:.1rem .35rem;border-radius:4px}
.rail-dot:hover .rail-label,.rail-dot:focus-visible .rail-label{opacity:1}
@media (max-width:1180px){.rail{display:none}}
@media print{.rail,.topbar,.progress,.stage,.explore-stage,.ex-controls,.bchips{display:none}}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}