@font-face{font-family:"Fraunces";font-weight:100 900;font-style:normal;font-display:swap;src:url("fonts/fraunces-normal-latin.woff2") format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Fraunces";font-weight:100 900;font-style:normal;font-display:swap;src:url("fonts/fraunces-normal-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:"Source Serif 4";font-weight:200 900;font-style:normal;font-display:swap;src:url("fonts/SourceSerif4-400-latin.woff2") format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Source Serif 4";font-weight:200 900;font-style:normal;font-display:swap;src:url("fonts/SourceSerif4-400-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:"IBM Plex Sans";font-weight:100 700;font-style:normal;font-display:swap;src:url("fonts/IBMPlexSans-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+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"IBM Plex Sans";font-weight:100 700;font-style:normal;font-display:swap;src:url("fonts/IBMPlexSans-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}

:root{
  --bg:#f2eee6;--surface:#fbf9f4;--ink:#16181d;--ink-soft:#33373f;--muted:#4b4f57;--line:#c9c2b2;--line-soft:#e0dacd;--accent:#8a1a24;
  --b0:#aac1d2;--b1:#e0b364;--b2:#e18528;--b3:#d45003;--b4:#b32517;--b5:#7c1021;--none:#d9d4ca;
  --park:#dfe6d2;--water:#c4d6df;--road:#fbf8f1;--rail:#bdb6a6;
  --car:#e9e3d6;--car-edge:#9d968a;--seat:#5b3a5e;--seat-2:#674468;
  --serif:"Source Serif 4",Georgia,serif;--display:"Fraunces",Georgia,serif;--sans:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#0d1015;--surface:#151920;--ink:#ede8de;--ink-soft:#d3cdc2;--muted:#b6b0a5;--line:#3a404b;--line-soft:#252a33;--accent:#ff9a7a;
  --b0:#3f5466;--b1:#7c5a2c;--b2:#b26e27;--b3:#ec7b38;--b4:#ff8b67;--b5:#ffcf77;--none:#262b33;
  --park:#121c17;--water:#122630;--road:rgba(255,236,200,.08);--rail:rgba(255,236,200,.12);
  --car:#1d222b;--car-edge:#4a5160;--seat:#4a2f50;--seat-2:#553858;color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#0d1015;--surface:#151920;--ink:#ede8de;--ink-soft:#d3cdc2;--muted:#b6b0a5;--line:#3a404b;--line-soft:#252a33;--accent:#ff9a7a;
  --b0:#3f5466;--b1:#7c5a2c;--b2:#b26e27;--b3:#ec7b38;--b4:#ff8b67;--b5:#ffcf77;--none:#262b33;
  --park:#121c17;--water:#122630;--road:rgba(255,236,200,.08);--rail:rgba(255,236,200,.12);
  --car:#1d222b;--car-edge:#4a5160;--seat:#4a2f50;--seat-2:#553858;color-scheme:dark}

*{box-sizing:border-box}
[hidden]{display:none!important}
svg[hidden]{display:none}
html{-webkit-text-size-adjust:100%;scroll-padding-top:56px}
body{margin:0;background:var(--bg);color:var(--ink);font:400 18px/1.6 var(--serif);overflow-x:hidden}
a{color:inherit;text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:var(--accent)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.vh{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-999px;top:0;background:var(--surface);padding:8px 12px;z-index:50}
.skip:focus{left:8px;top:8px}

/* topbar */
.topbar{position:sticky;top:0;z-index:30;display:flex;align-items:center;gap:14px;height:44px;padding:0 16px;padding-top:var(--safe-top,0);background:color-mix(in srgb,var(--bg) 92%,transparent);border-bottom:1px solid var(--line-soft);font:500 14px/1 var(--sans)}
.home{display:flex;align-items:center;gap:7px;text-decoration:none;white-space:nowrap}
.home-ico{color:var(--accent)}
.topnav{display:flex;gap:14px;overflow:hidden}
.topnav a{text-decoration:none;color:var(--ink-soft);white-space:nowrap}
.topnav a:hover{color:var(--accent)}
.spacer{flex:1}
.lang-switch{text-decoration:none;font-weight:600;border:1px solid var(--line);border-radius:999px;padding:5px 9px}
.icon-btn{background:none;border:1px solid var(--line);color:var(--ink);border-radius:999px;width:32px;height:32px;display:grid;place-items:center;cursor:pointer}
.progress{position:absolute;left:0;right:0;bottom:-1px;height:2px;pointer-events:none}
.progress span{display:block;height:100%;background:var(--accent);transform-origin:0 50%;transform:scaleX(0)}
@media (max-width:860px){.topnav{display:none}}

/* hero */
.hero{max-width:880px;margin:0 auto;padding:34px 16px 8px}
.kicker{font:600 13px/1.3 var(--sans);letter-spacing:.06em;text-transform:uppercase;color:var(--accent);margin:0 0 10px}
h1{font:600 clamp(30px,5vw,50px)/1.08 var(--display);letter-spacing:-.01em;margin:0 0 16px;text-wrap:balance}
.deck{font-size:clamp(18px,2.2vw,21px);line-height:1.5;margin:0 0 10px;color:var(--ink-soft)}
.deck b{color:var(--ink)}
.deck-src{font:400 14px/1.5 var(--sans);color:var(--muted);margin:0}
#shared-intro{font:600 17px/1.45 var(--sans);background:var(--surface);border-left:3px solid var(--accent);padding:10px 14px;margin:14px 0 0}

/* the tool */
.tool{max-width:1440px;margin:18px auto 0;padding:0 16px;font-family:var(--sans)}
.timebar{display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px;padding:10px 12px;border:1px solid var(--line-soft);border-radius:12px;background:var(--surface);position:sticky;top:44px;z-index:20}
.clock{display:flex;align-items:baseline;gap:8px;min-width:150px}
.clock b{font:600 28px/1 var(--sans);font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.clock span{font-size:14px;color:var(--muted)}
.daychips{display:flex;gap:4px;flex-wrap:wrap}
.daychips button,.btn{font:500 14px/1 var(--sans);color:var(--ink);background:transparent;border:1px solid var(--line);border-radius:999px;padding:8px 12px;cursor:pointer;min-height:36px}
.daychips button[aria-pressed="true"]{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.btn:hover,.daychips button:hover{border-color:var(--ink)}
.t-ctl{display:flex;align-items:center;gap:8px;flex:1 1 280px}
.t-ctl input[type=range]{flex:1;accent-color:var(--accent);min-width:120px;height:32px}
#play{display:inline-flex;align-items:center;gap:6px}
#play .ic-pause{display:none}#play[data-on="true"] .ic-pause{display:inline}#play[data-on="true"] .ic-play{display:none}
.grid2{display:grid;grid-template-columns:minmax(360px,460px) 1fr;gap:16px;margin-top:14px;align-items:start}
@media (max-width:1060px){.grid2{grid-template-columns:1fr}}
.panel{background:var(--surface);border:1px solid var(--line-soft);border-radius:12px;padding:14px}
.find{display:grid;grid-template-columns:1fr auto;gap:8px 8px;align-items:end}
.find label{display:block;font:600 13px/1.2 var(--sans);color:var(--muted);margin:0 0 4px}
.combo{position:relative}
.find input{width:100%;font:500 17px/1.2 var(--sans);color:var(--ink);background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:10px 11px;min-height:44px}
.combo ul{position:absolute;left:0;right:0;top:100%;margin:2px 0 0;padding:4px;list-style:none;background:var(--surface);border:1px solid var(--line);border-radius:8px;z-index:25;max-height:290px;overflow:auto;box-shadow:0 8px 24px rgba(0,0,0,.18)}
.combo li{padding:8px 9px;border-radius:6px;cursor:pointer;font-size:15px}
.combo li[aria-selected="true"],.combo li:hover{background:var(--line-soft)}
#swap{grid-row:1/3;grid-column:2;align-self:center;width:44px;height:44px;padding:0;border-radius:50%;display:grid;place-items:center}
.find .f2{grid-column:1}
.egs{display:flex;flex-wrap:wrap;gap:6px;align-items:center;margin:10px 0 0;font-size:13px;color:var(--muted)}
.egs button{font:500 13px/1 var(--sans);border:1px dashed var(--line);background:none;color:var(--ink);border-radius:999px;padding:7px 10px;cursor:pointer;min-height:32px}
.egs button:hover{border-style:solid}
#result{margin-top:14px}
.legs{display:flex;flex-wrap:wrap;gap:4px 12px;margin:0 0 8px;font-size:14px;line-height:1.35}
.leg{display:inline-flex;align-items:center;gap:6px;font-weight:600}
.leg i{display:inline-block;width:14px;height:6px;border-radius:3px;background:var(--lc);box-shadow:0 0 0 1px var(--line)}
.leg-ab{font-weight:400;color:var(--ink-soft)}
.mins{color:var(--muted)}
.rbar{display:flex;gap:2px;height:18px;margin:0 0 10px}
.rb{flex:1;border:0;padding:0;border-radius:4px;background:var(--c,var(--none));cursor:pointer;min-width:3px;position:relative}
.rb.on{box-shadow:0 0 0 2px var(--bg),0 0 0 4px var(--ink)}
.rb.walk{background:repeating-linear-gradient(90deg,var(--line) 0 3px,transparent 3px 6px);cursor:default}
.headline{font:500 17px/1.45 var(--sans);margin:0 0 8px}
.headline b{font-weight:700}
.tips{margin:0 0 6px;padding-left:18px;font-size:15px;line-height:1.45}
.tips li{margin:3px 0}
.unc{font-size:13px;color:var(--muted);margin:6px 0 0}
.msg{font-size:15px;color:var(--muted)}
figure{margin:0}
.carfig{margin-top:12px}
#car{width:100%;height:132px;display:block}
@media (max-width:520px){#car{height:112px}}
#car-cap{font-size:14px;line-height:1.45;margin:6px 0 0;color:var(--ink-soft)}
#car-cap b{color:var(--ink)}
.gridfig{margin-top:16px;position:relative}
.gridfig h3{font:600 14px/1.3 var(--sans);margin:0 0 6px}
#grid{width:100%;height:136px;display:block;cursor:pointer;touch-action:pan-y}
.ftip{position:absolute;z-index:5;pointer-events:none;background:var(--ink);color:var(--bg);font:500 13px/1.3 var(--sans);padding:6px 8px;border-radius:6px;white-space:nowrap}
.gridnote{font-size:13px;color:var(--muted);margin:6px 0 0}
.legend{display:flex;flex-wrap:wrap;gap:4px 12px;font-size:13px;color:var(--ink-soft);margin:10px 0 0;padding:0;list-style:none}
.legend li{display:flex;align-items:center;gap:5px}
.legend i{width:16px;height:10px;border-radius:2px;display:inline-block}
.rowbtns{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-top:12px}
.mapwrap{position:relative;border-radius:12px;overflow:hidden;border:1px solid var(--line-soft);background:var(--bg)}
#map{display:block;width:100%;height:var(--map-h,640px);touch-action:none;cursor:grab}
.mapctl{position:absolute;right:10px;top:10px;display:flex;flex-direction:column;gap:6px}
.mapctl .btn{width:40px;height:40px;padding:0;display:grid;place-items:center;background:var(--surface);font-size:20px}
#whole{position:absolute;left:10px;top:10px;background:var(--surface)}
.maplegend{position:absolute;left:10px;bottom:10px;right:10px;background:color-mix(in srgb,var(--surface) 88%,transparent);border-radius:8px;padding:6px 10px;font-size:12px;pointer-events:none}
.maplegend .legend{margin:0}
.maplegend p{margin:0 0 4px;font-weight:600}
#map-tip{max-width:260px;white-space:normal}
#pop{position:absolute;z-index:6;background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:10px 34px 10px 12px;box-shadow:0 8px 24px rgba(0,0,0,.2);font-size:14px}
#pop p{margin:0 0 8px}
.pop-btns{display:flex;gap:6px}
.pop-x{position:absolute;right:4px;top:4px;width:30px;height:30px;border:0;background:none;color:var(--ink);font-size:20px;cursor:pointer}
#load-msg{font-size:15px;color:var(--accent)}
.noscript{font-size:15px}

/* share row */
.share-row{display:flex;align-items:center;gap:6px;flex-wrap:wrap;margin-top:12px;font:400 13px/1 var(--sans);color:var(--muted)}
.share-row .share-lab{margin-right:4px}
.share-row a,.share-row button{width:40px;height:40px;border-radius:50%;border:1px solid var(--line-soft);background:transparent;color:var(--ink);display:grid;place-items:center;cursor:pointer;padding:0}
.share-row a:hover,.share-row button:hover{border-color:var(--accent);color:var(--accent)}
@media (pointer:coarse){.share-row a,.share-row button{width:44px;height:44px}}
.share-row [role=status]{margin-left:6px}

/* sections */
.s{padding:56px 16px 8px}
.s .wrap{max-width:720px;margin:0 auto}
.s .wide{max-width:1040px;margin:0 auto}
.s h2{font:600 clamp(25px,3.4vw,34px)/1.15 var(--display);margin:0 0 14px;text-wrap:balance}
.s h2 a{text-decoration:none}
.s h3{font:600 19px/1.3 var(--sans);margin:26px 0 6px}
.s p{margin:0 0 14px}
.lede{font-size:19px;color:var(--ink-soft)}
.wide>p,.wide>h3{max-width:720px}
.tbl-wrap{overflow-x:auto;margin:10px 0 18px;-webkit-overflow-scrolling:touch}
table{border-collapse:collapse;font:400 14px/1.35 var(--sans);width:100%;min-width:560px}
th,td{padding:8px 8px;border-bottom:1px solid var(--line-soft);text-align:left;vertical-align:top}
thead th{font-weight:600;color:var(--muted);font-size:12.5px;border-bottom:1px solid var(--line)}
td.n,th.n{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
.chip{display:inline-block;width:12px;height:12px;border-radius:3px;vertical-align:-1px;margin-right:6px;box-shadow:0 0 0 1px var(--line)}
.sw{display:inline-block;min-width:44px;padding:2px 6px;border-radius:4px;text-align:center;font-weight:600}
.dots{position:relative;height:22px;min-width:180px}
.dots i{position:absolute;top:5px;width:12px;height:12px;border-radius:50%;margin-left:-6px;border:2px solid var(--surface)}
.dots .ax{position:absolute;left:0;right:0;top:10px;height:1px;background:var(--line)}
.dots .one{position:absolute;top:2px;bottom:2px;width:1px;background:var(--ink-soft)}
.more-rows{margin-top:8px}
.src{padding-left:18px;font-size:15px}
.src li{margin:4px 0}
.fig-note{font:400 13px/1.45 var(--sans);color:var(--muted)}

/* rail */
.rail{position:fixed;right:10px;top:50%;transform:translateY(-50%);display:flex;flex-direction:column;gap:10px;z-index:15;opacity:0;transition:opacity .3s}
html.rail-on .rail{opacity:1}
.rail a{position:relative;display:block;width:9px;height:9px;border-radius:50%;border:1px solid var(--ink-soft);background:transparent}
.rail a[aria-current]{background:var(--ink)}
.rail a span{position:absolute;right:16px;top:50%;transform:translateY(-50%);white-space:nowrap;font:500 12px/1 var(--sans);background:var(--surface);border:1px solid var(--line-soft);padding:4px 7px;border-radius:5px;opacity:0;pointer-events:none}
.rail a:hover span,.rail a:focus span{opacity:1}
@media (max-width:1200px){.rail{display:none}}
@media print{.rail,.topbar,.share-row{display:none}}

.foot{max-width:1040px;margin:60px auto 0;padding:24px 16px 60px;border-top:1px solid var(--line-soft);display:flex;flex-wrap:wrap;gap:8px 18px;font:400 13px/1.5 var(--sans);color:var(--muted)}
.foot a{color:var(--ink-soft)}
.s-page{max-width:760px;margin:40px auto;padding:0 16px;font-family:var(--sans)}
.s-page img{max-width:100%;height:auto;border-radius:10px}
.nf main{max-width:640px;margin:80px auto;padding:0 16px}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}

.daychips .ds{display:none}
@media (max-width:640px){
  .timebar{gap:6px 8px;padding:8px 10px;top:44px}
  .clock{min-width:0}.clock b{font-size:22px}.clock span{display:none}
  .daychips{flex-wrap:nowrap;gap:3px}
  .daychips button{padding:7px 8px;min-height:34px;font-size:13px}
  .daychips .dl{display:none}.daychips .ds{display:inline}
  .t-ctl{flex-basis:100%}
  #play{padding:7px 10px}
}

@media (max-width:640px){html.typing .timebar{position:static}}