@font-face{font-family:"Fraunces";font-style:normal;font-weight:400 700;font-display:swap;
  src:url("fonts/fraunces-latin.woff2") format("woff2");unicode-range:U+0000-00FF,U+2013-2014,U+2018-201D,U+201E,U+2212;}
@font-face{font-family:"Fraunces";font-style:normal;font-weight:400 700;font-display:swap;
  src:url("fonts/fraunces-latin-ext.woff2") format("woff2");unicode-range:U+0100-024F,U+1E00-1EFF,U+20AC;}
@font-face{font-family:"Source Serif";font-style:normal;font-weight:400 700;font-display:swap;
  src:url("fonts/sourceserif-latin.woff2") format("woff2");unicode-range:U+0000-00FF,U+2013-2014,U+2018-201D,U+201E,U+2212;}
@font-face{font-family:"Source Serif";font-style:normal;font-weight:400 700;font-display:swap;
  src:url("fonts/sourceserif-latin-ext.woff2") format("woff2");unicode-range:U+0100-024F,U+1E00-1EFF,U+20AC;}
:root{
  --paper:#f2ede1;--card:#faf6ec;--surface:#e7dcc4;--ink:#232a35;--ink-2:#5d6672;
  --line:#c9c0ab;--amber:#b97a12;--green:#2e7d52;--link:#1e4fa3;--river:#2f5d9e;
  --land-ro:#e9e2cf;--land-md:#dfe5d2;
  --shadow:0 1px 0 rgba(35,42,53,.08),0 12px 32px -18px rgba(35,42,53,.35);
}
[data-theme="dark"]{
  --paper:#10151c;--card:#1a2230;--surface:#232e40;--ink:#ece4d2;--ink-2:#a9b0bc;
  --line:#3a4556;--amber:#f0a832;--green:#4caf7d;--link:#9db9f2;--river:#5f8fce;
  --land-ro:#1c2534;--land-md:#182230;
  --shadow:0 1px 0 rgba(0,0,0,.4),0 12px 32px -18px rgba(0,0,0,.6);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);
  font-family:"Source Serif",Georgia,serif;font-size:1.125rem;line-height:1.6}
h1,h2,h3,.tag,.hud-step,.hud-km,.map-label,.next,.hero-fig,.chip{font-family:"Fraunces",Georgia,serif}
a{color:var(--link)}
.skip{position:absolute;left:-999px;top:0;background:var(--card);color:var(--ink);padding:.5rem 1rem;z-index:50}
.skip:focus{left:0}
.topbar{display:flex;justify-content:space-between;align-items:center;padding:.6rem 1rem;
  border-bottom:1px solid var(--line);position:sticky;top:0;background:var(--paper);z-index:30}
.topbar .home svg{width:26px;height:26px;color:var(--ink)}
.topbar nav{display:flex;gap:.8rem;align-items:center}
.edition{font-family:"Fraunces",Georgia,serif;font-size:.95rem;text-decoration:none;border:1px solid var(--line);
  padding:.25rem .7rem;border-radius:999px;color:var(--ink)}
#theme-toggle{background:none;border:1px solid var(--line);color:var(--ink);border-radius:999px;
  padding:.3rem .8rem;font-size:.85rem;cursor:pointer}
.rail{position:fixed;left:.7rem;top:50%;transform:translateY(-50%);display:flex;flex-direction:column;
  gap:.9rem;z-index:25}
.rail a{display:flex;align-items:center;text-decoration:none}
.rail .dot{width:10px;height:10px;border-radius:50%;background:var(--ink-2);opacity:.55}
.rail a.on .dot{background:var(--amber);opacity:1}
.rail .lbl{display:none}
main{display:block}
.hero{position:relative;max-width:none;margin:0;padding:0;min-height:calc(100svh - 3.4rem)}
.hero picture{display:block}
.hero picture img{width:100%;height:calc(100svh - 3.4rem);display:block;object-fit:cover;border-radius:0}
.hero-card{position:absolute;z-index:3;left:max(1rem,4vw);bottom:1.25rem;width:min(34rem,42vw);margin:0;
  background:var(--card);border:1px solid var(--line);border-radius:14px;
  padding:1.15rem 1.25rem 1rem;box-shadow:var(--shadow)}
.hero-card h1{font-size:clamp(1.7rem,4.5vw,2.6rem);line-height:1.15;margin:0 0 .7rem}
.deck{font-size:1.12rem;margin:0 0 .8rem}
.hero-fig{font-size:1rem;color:var(--amber);margin:0 0 1rem}
.city-form{display:flex;flex-wrap:wrap;gap:.6rem;align-items:flex-end;margin:0 0 .5rem}
.city-form label{flex-basis:100%;font-size:.95rem}
.city-form input{flex:1 1 12rem;font:inherit;color:var(--ink);background:var(--paper);
  border:1px solid var(--line);border-radius:8px;padding:.55rem .8rem}
.city-form button{font:inherit;background:var(--amber);color:#141414;border:0;border-radius:8px;
  padding:.55rem 1.1rem;cursor:pointer;font-weight:700}
.chips{display:flex;flex-wrap:wrap;gap:.5rem;align-items:center;font-size:.95rem;margin:.4rem 0}
.chip{border:1px solid var(--line);border-radius:999px;padding:.2rem .8rem;text-decoration:none;color:var(--ink)}
.city-result{margin:.6rem 0;min-height:1.4em}
.hint{font-size:.9rem;color:var(--ink-2);margin:.2rem 0}
.ride-line{margin:.6rem 0 0}
.hero-cap{position:absolute;z-index:2;top:12px;right:12px;max-width:min(18rem,28vw);margin:0;
  padding:8px 10px;border-radius:8px;background:rgba(20,16,8,.72);color:#f4efe4;font-size:.78rem}
.finder{max-width:44rem;margin:0 auto;padding:1.4rem 1rem 0}
.paper{max-width:44rem;margin:0 auto;padding:2rem 1rem}
.paper h2{font-size:clamp(1.4rem,3.4vw,1.9rem);line-height:1.25;margin:0 0 1rem}
.plink{text-decoration:none;color:var(--ink-2);font-size:.8em;padding:.4rem .3rem}
.paper h3{font-size:1.2rem;margin:1.6rem 0 .5rem}
.paper p{margin:0 0 1rem}
.lede{font-size:1.08rem}
.cite{font-size:.92rem;color:var(--ink-2)}
.fig{margin:1.4rem 0}
.fig-frame img{width:100%;height:auto;display:block;border-radius:10px}
.fig.wide{max-width:60rem}
.fig.small img{max-width:26rem;margin:0 auto}
figcaption{font-size:.88rem;color:var(--ink-2);margin-top:.5rem}
.scrolly{max-width:72rem;margin:0 auto;padding:0 1rem}
.stage{position:sticky;top:3.4rem;margin:0 0 1rem}
.viewport{border:1px solid var(--line);border-radius:12px;overflow:hidden;background:var(--card)}
#map{display:block;width:100%;height:auto;aspect-ratio:16/10}
.land-ro{fill:var(--land-ro)}
.land-md{fill:var(--land-md)}
.river{fill:none;stroke:var(--river);stroke-width:calc(10px / var(--z,1));opacity:.85}
.border-line{fill:none;stroke:var(--ink-2);stroke-width:calc(4px / var(--z,1));stroke-dasharray:calc(14px / var(--z,1)) calc(10px / var(--z,1));opacity:.7}
.track{fill:none;stroke-width:calc(7px / var(--z,1));stroke-linecap:round;opacity:.85}
.track.g-1435{stroke:var(--amber)}
.track.g-1520{stroke:var(--green)}
.track-bright{fill:none;stroke:var(--ink);stroke-width:calc(2.5px / var(--z,1));stroke-linecap:round;opacity:.85}
.future-line{fill:none;stroke:var(--amber);stroke-width:calc(5px / var(--z,1));stroke-dasharray:calc(16px / var(--z,1)) calc(12px / var(--z,1))}
.future-line[hidden]{display:none}
.stn .dot{fill:var(--card);stroke:var(--ink)}
.stn .hit{fill:transparent}
@media(pointer:fine){.stn{cursor:pointer}}
.border-badge path{fill:none;stroke:var(--ink);stroke-width:calc(3px / var(--z,1))}
#train .tdot{fill:var(--amber);stroke:#141414}
#train .tring{fill:none;stroke:var(--amber);opacity:.5}
.map-label{fill:var(--ink);paint-order:stroke;stroke:var(--card);stroke-width:.18em}
.stage-hud{background:var(--card);border:1px solid var(--line);border-radius:12px;
  padding:.9rem 1.1rem;margin-top:.7rem}
.stage-tools{margin-top:.35rem}
.stage-tools summary{cursor:pointer;padding:.25rem 0}
.tools-body{padding-top:.35rem}
.hud-step{font-size:1.02rem;margin:0}
.hud-km{margin:.2rem 0 .5rem;font-size:1rem}
.hud-legend{display:flex;flex-wrap:wrap;gap:.4rem 1rem;font-size:.88rem;margin:0 0 .6rem}
.sw{display:inline-block;width:.9em;height:.9em;border-radius:2px;margin-right:.35em;vertical-align:baseline}
.sw.g1435{background:var(--amber)}
.sw.g1520{background:var(--green)}
.sw.gcomb{background:linear-gradient(135deg,var(--amber) 50%,var(--green) 50%)}
.sw.griver{background:var(--river)}
.hud-stns{display:flex;flex-wrap:wrap;gap:.4rem;margin:0 0 .5rem}
.hud-stns button{font:inherit;font-size:.85rem;background:var(--paper);color:var(--ink);
  border:1px solid var(--line);border-radius:999px;padding:.25rem .7rem;cursor:pointer}
.stn-result{margin:.3rem 0;font-size:.95rem}
.stn-result[hidden]{display:none}
.stn-hint{font-size:.88rem;color:var(--ink-2);margin:.2rem 0}
.readout{border-top:1px solid var(--line);padding-top:.6rem;margin-top:.6rem}
.readout[hidden]{display:none}
.readout .rq-label{font-size:.8rem;text-transform:uppercase;letter-spacing:.06em;color:var(--ink-2);margin:0 0 .3rem}
.readout blockquote{margin:0 0 .4rem;font-style:italic}
.fig-twin{margin-top:.7rem;font-size:.92rem}
.fig-twin summary{cursor:pointer}
.fig-twin .small{font-size:.85rem;color:var(--ink-2)}
.flow .step{background:var(--card);border:1px solid var(--line);border-radius:12px;
  padding:1.1rem 1.2rem;margin:0 0 60vh}
.flow .step:last-child{margin-bottom:20vh}
.step .tag{font-size:.85rem;text-transform:uppercase;letter-spacing:.08em;color:var(--amber);margin:0 0 .3rem}
.step h3{margin:0 0 .5rem}
.step .next{font-size:.9rem;color:var(--ink-2);margin:.6rem 0 0}
.worked{background:var(--card);border:1px solid var(--line);border-radius:12px;
  padding:1rem 1.2rem;margin:0 0 1rem}
.worked h3{margin:0 0 .4rem}
.method{padding-left:1.3rem}
.method li{margin-bottom:.6rem}
.lic{list-style:disc;padding-left:1.3rem}
.see-also{margin-top:1.2rem}
.share{max-width:44rem;margin:0 auto;padding:0 1rem}
.share-row{display:flex;flex-wrap:wrap;gap:.6rem;align-items:center}
.share-row .lab{font-size:.9rem;color:var(--ink-2);margin-right:.3rem}
.share-row a,.share-row button{color:var(--ink);background:var(--card);border:1px solid var(--line);
  border-radius:8px;padding:.35rem .5rem;cursor:pointer;display:inline-flex}
.share-row button[hidden]{display:none}
.share-status{font-size:.88rem;color:var(--ink-2);min-height:1.2em}
.foot{border-top:1px solid var(--line);margin-top:2rem;padding:1.2rem 1rem 3rem;text-align:center;
  font-size:.9rem;color:var(--ink-2)}
@media(min-width:60rem){
  .fig.wide{margin-left:calc((44rem - 60rem)/2);margin-right:calc((44rem - 60rem)/2)}
  .scrolly{display:grid;grid-template-columns:minmax(20rem,27rem) 1fr;gap:2rem;align-items:start}
  .scrolly .flow{grid-column:1;grid-row:1}
  .scrolly .stage{grid-column:2;grid-row:1;top:3.4rem}
}
@media(max-width:59.99rem){
  .rail{display:none}
  .hero{min-height:0}
  .hero picture img{height:42svh}
  .hero-card{position:relative;left:auto;bottom:auto;width:auto;margin:.75rem}
  .hero-cap{position:static;max-width:none;margin:.2rem .75rem 0;padding:0;background:none;color:var(--ink-2)}
  .stage{top:3.2rem}
  .viewport{max-height:22svh}
  #map{max-height:22svh}
  .stage-hud{padding:.3rem .55rem;margin-top:.35rem}
  .hud-step{font-size:.84rem;line-height:1.15}
  .hud-km{display:flex;justify-content:space-between;gap:.5rem;font-size:.75rem;
    line-height:1.15;margin:.1rem 0;white-space:nowrap}
  .hud-legend{display:flex;flex-wrap:nowrap;overflow-x:auto;gap:.15rem .5rem;
    font-size:.7rem;line-height:1.15;margin:0;white-space:nowrap}
  .stage-tools{font-size:.86rem}
  .stage-tools[open]{max-height:28svh;overflow:auto}
  .stage-tools summary{display:flex;align-items:center;min-height:44px;padding:.3rem 0;line-height:1.2}
  .tools-body{padding-top:.2rem}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
:focus-visible{outline:2px solid var(--amber);outline-offset:2px}