/* Who moves London's hire bikes. Identity: the city at the hour the docks fill — riders as warm sodium light,
   the bikes that move without a rider in cold blue. Paper by day, night map by night. Colours live in tokens; the canvas reads them. */
@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:#f3efe6;--surface:#fbf9f3;--ink:#121a26;--ink-soft:#3b4555;--line:#cfc7b4;--line-soft:#e2dccd;
  --accent:#8a2808;--tag:#e8c27a;--tag-ink:#1d1406;
  --map-bg:#ebe6d9;--water:#a9c9d8;--park:#d3e2c2;--wood:#c0d8ad;--road:#fffdf8;--road-minor:#f7f3ea;--rail:#bdb4a0;
  --ride:#c2410c;--ride-soft:rgba(194,65,12,.35);--ride-ink:#7f2704;--jump-ink:#0d3f7d;--jump:#1557a6;--jump-soft:rgba(21,87,166,.3);--dock:#5b4a3a;--dock-dim:rgba(40,40,40,.28);
  --plate:#fffdf7;--plate-ink:#121a26;
  --serif:"Source Serif 4",Georgia,"Times New Roman",serif;--sans:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",sans-serif;--head:"Fraunces",Georgia,"Times New Roman",serif;
  --bar:44px;color-scheme:light;
}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]){
  --bg:#0b1220;--surface:#121b2c;--ink:#eef0f4;--ink-soft:#b9c0cc;--line:#26324a;--line-soft:#1a2436;
  --accent:#ffb454;--tag:#d9a24a;--tag-ink:#160f02;
  --map-bg:#070b14;--water:#0f2a3b;--park:#0d1f19;--wood:#0e2419;--road:rgba(220,230,255,.13);--road-minor:rgba(220,230,255,.07);--rail:rgba(220,230,255,.11);
  --ride:#ffb454;--ride-soft:rgba(255,180,84,.35);--ride-ink:#ffc77a;--jump-ink:#8fdcff;--jump:#5cc8ff;--jump-soft:rgba(92,200,255,.3);--dock:#f3d9a8;--dock-dim:rgba(230,236,255,.26);
  --plate:#f4f1e8;--plate-ink:#0b1220;
  color-scheme:dark}}
:root[data-theme=dark]{
  --bg:#0b1220;--surface:#121b2c;--ink:#eef0f4;--ink-soft:#b9c0cc;--line:#26324a;--line-soft:#1a2436;
  --accent:#ffb454;--tag:#d9a24a;--tag-ink:#160f02;
  --map-bg:#070b14;--water:#0f2a3b;--park:#0d1f19;--wood:#0e2419;--road:rgba(220,230,255,.13);--road-minor:rgba(220,230,255,.07);--rail:rgba(220,230,255,.11);
  --ride:#ffb454;--ride-soft:rgba(255,180,84,.35);--ride-ink:#ffc77a;--jump-ink:#8fdcff;--jump:#5cc8ff;--jump-soft:rgba(92,200,255,.3);--dock:#f3d9a8;--dock-dim:rgba(230,236,255,.26);
  --plate:#f4f1e8;--plate-ink:#0b1220;
  color-scheme:dark}

*{box-sizing:border-box}
[hidden]{display:none!important}
svg[hidden]{display:none}
html{scroll-padding-top:calc(var(--bar) + 12px);-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--serif);font-size:1.0625rem;line-height:1.58}
a{color:inherit;text-decoration-color:var(--accent);text-underline-offset:.16em;text-decoration-thickness:.09em}
a:hover{color:var(--accent)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.skip{position:absolute;left:-999px;top:0;background:var(--ink);color:var(--bg);padding:.5rem .8rem;z-index:50}
.skip:focus{left:8px;top:8px}
.vh{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* topbar: slim, quiet */
.topbar{position:sticky;top:0;z-index:30;height:var(--bar);display:flex;align-items:center;gap:.9rem;padding:0 .9rem;background:var(--bg);border-bottom:1px solid var(--line);font-family:var(--sans);font-size:.84rem}
.topbar .home{display:flex;align-items:center;gap:.45rem;font-weight:600;text-decoration:none;white-space:nowrap}
.home-ico{flex:none}
.topnav{display:flex;gap:1rem;overflow-x:auto;scrollbar-width:none;white-space:nowrap;min-width:0}
.topnav::-webkit-scrollbar{display:none}
.topnav a{text-decoration:none;color:var(--ink-soft)}
.topnav a:hover{color:var(--ink)}
.spacer{flex:1}
.lang-switch{font-weight:600;text-decoration:none;border:1px solid var(--line);border-radius:999px;padding:.12rem .55rem;white-space:nowrap}
.icon-btn{display:inline-grid;place-items:center;width:32px;height:32px;border-radius:50%;border:1px solid var(--line);background:transparent;color:var(--ink);cursor:pointer;flex:none}
.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)}
#prog-bike{position:absolute;left:0;bottom:1px;color:var(--accent);line-height:0;will-change:transform;opacity:0;transition:opacity .3s}
#prog-bike svg{width:18px;height:13px}
@media (max-width:700px){.topnav{display:none}}

/* scrolly: text column and pinned map */
.scrolly{display:grid;grid-template-columns:minmax(0,29rem) minmax(0,1fr);grid-template-areas:"hero stage" "steps stage"}
.hero{grid-area:hero;padding:clamp(1.2rem,4vh,2.6rem) clamp(1rem,2.6vw,2.2rem) 1.6rem;min-height:calc(100svh - var(--bar));display:flex;flex-direction:column;justify-content:center}
.steps{grid-area:steps;padding:0 clamp(1rem,2.6vw,2.2rem) 30vh}
.stage{grid-area:stage;position:sticky;top:var(--bar);height:calc(100svh - var(--bar));align-self:start;background:var(--map-bg);border-left:1px solid var(--line);overflow:hidden}
#map{display:block;width:100%;height:100%;touch-action:pan-y;cursor:crosshair}
.stage-fallback{position:absolute;inset:0;display:none;place-items:center;padding:2rem;text-align:center;color:var(--ink-soft);font-family:var(--sans)}
.map-failed .stage-fallback{display:grid}
.stage-bar{position:absolute;left:0;right:0;bottom:0;display:flex;align-items:center;flex-wrap:wrap;gap:.4rem .7rem;padding:.55rem .75rem;font-family:var(--sans);font-size:.8rem;background:linear-gradient(to top,var(--map-bg) 64%,transparent)}
#cap{flex:1 1 14rem;min-width:0;color:var(--ink-soft);line-height:1.3}
.btn{display:inline-flex;align-items:center;gap:.4rem;min-height:36px;padding:.3rem .8rem;border:1px solid var(--ink);border-radius:999px;background:var(--surface);color:var(--ink);font:600 .82rem var(--sans);cursor:pointer;white-space:nowrap}
.btn:hover{border-color:var(--accent);color:var(--accent)}
.btn .ic-pause{display:none}.btn[data-on=true] .ic-pause{display:block}.btn[data-on=true] .ic-play{display:none}
.t-ctl{display:flex;align-items:center;gap:.5rem}
.t-ctl input{width:clamp(7rem,18vw,15rem);accent-color:var(--accent);height:28px}
#clock{position:absolute;left:.8rem;top:.7rem;display:flex;flex-direction:column;gap:.15rem;font-family:var(--sans);pointer-events:none;text-shadow:0 0 6px var(--map-bg),0 0 2px var(--map-bg)}
#clock b{font:700 clamp(1.9rem,3.6vw,2.9rem)/1 var(--head);font-variant-numeric:tabular-nums;letter-spacing:.01em;color:var(--ink)}
#clock-n{display:flex;flex-direction:column;font-size:.8rem;line-height:1.35;color:var(--ink)}
#clock-n span{max-width:60vw}
#clock-n .cr::before,#clock-n .cj::before{content:"";display:inline-block;width:14px;height:0;border-top:2px solid var(--ride);vertical-align:.3em;margin-right:.4em}
#clock-n .cj::before{border-top:2px dashed var(--jump)}
#legend{position:absolute;right:.7rem;top:.7rem;max-width:min(17rem,46%);display:flex;flex-direction:column;gap:.25rem;padding:.45rem .6rem;background:var(--surface);border:1px solid var(--line);border-radius:4px;font:.74rem/1.25 var(--sans);color:var(--ink)}
.lg{display:flex;align-items:center;gap:.45rem}
.sw{flex:none;width:18px;height:0;border-top:2px solid var(--ride)}
.sw.jump{border-top:2px dashed var(--jump)}.sw.jump.solid{border-top-style:solid}
.sw.fill,.sw.ring{width:11px;height:11px;border-radius:50%;border:2px solid var(--ride)}
.sw.ride.fill{background:var(--ride)}.sw.jump.fill{background:var(--jump);border:2px solid var(--jump)}.sw.jump.ring{border:2px solid var(--jump)}
#tip,#pop{position:absolute;left:0;top:0;z-index:6;max-width:16rem;display:flex;flex-direction:column;gap:.1rem;padding:.45rem .65rem;background:var(--surface);color:var(--ink);border:1px solid var(--line);border-radius:5px;font:.8rem/1.3 var(--sans);box-shadow:0 2px 10px rgba(0,0,0,.25)}
#tip{pointer-events:none}
#tip b,#pop b{font:700 .95rem/1.2 var(--head)}
#tip .j,#pop .j{color:var(--jump-ink);font-weight:600}
#tip em{font-style:normal;color:var(--ink-soft);font-size:.74rem}
#pop a{font-weight:600;margin-top:.2rem}

.kicker{font:600 .78rem var(--sans);letter-spacing:.09em;text-transform:uppercase;color:var(--ink-soft);margin:0 0 .7rem}
h1{font:800 clamp(1.62rem,1.9vw + .85rem,2.3rem)/1.08 var(--head);letter-spacing:-.005em;margin:0 0 .9rem;text-wrap:balance}
.deck{font-size:1.08rem;line-height:1.5;margin:0 0 1rem}
.deck b{font-weight:680}
.deck-src{font:.84rem/1.4 var(--sans);color:var(--ink-soft);margin:-.5rem 0 1.1rem}

/* the reader's dock */
.find label{font:600 .86rem var(--sans);display:block;margin-bottom:.3rem}
.find-row{display:flex;gap:.5rem;align-items:stretch;margin:.2rem 0 .4rem}
.combo{position:relative;flex:1;min-width:0}
.find-in{width:100%;font:600 1.05rem/1 var(--sans);padding:.5rem .7rem;border:2px solid var(--ink);border-radius:4px;background:var(--plate);color:#121a26;height:50px}
.find-in::placeholder{color:#4a5260;opacity:1;font-weight:400}
.find-go{font:700 .95rem var(--sans);padding:0 1.1rem;border:2px solid var(--ink);border-radius:4px;background:var(--ink);color:var(--bg);cursor:pointer;height:50px}
.find-go:hover{background:var(--accent);border-color:var(--accent)}
#find-list{position:absolute;left:0;right:0;top:calc(100% + 2px);z-index:12;list-style:none;margin:0;padding:.2rem 0;background:var(--surface);border:1px solid var(--ink);border-radius:4px;max-height:18rem;overflow:auto;font:.92rem/1.3 var(--sans);box-shadow:0 4px 14px rgba(0,0,0,.2)}
#find-list li{display:flex;justify-content:space-between;gap:.8rem;padding:.5rem .7rem;cursor:pointer}
#find-list li span{color:var(--ink-soft);font-variant-numeric:tabular-nums}
#find-list li:hover,#find-list li.on{background:var(--line-soft)}
.egs{font:.84rem var(--sans);color:var(--ink-soft);margin:.2rem 0 0;display:flex;flex-wrap:wrap;gap:.35rem .5rem;align-items:center}
.egs button{font:600 .86rem var(--sans);background:transparent;border:1px solid var(--line);border-radius:3px;color:var(--ink);padding:.2rem .55rem;min-height:32px;cursor:pointer}
.egs button:hover{border-color:var(--accent);color:var(--accent)}
#find-msg{font:.86rem var(--sans);color:var(--accent);min-height:1.2em;margin:.3rem 0 0}
#result{margin-top:.6rem}
.page-share .share-row{margin-top:.2rem}
.hero.has-d{justify-content:flex-start}
.hero.has-d .kicker{order:-5}.hero.has-d h1{order:-4;font-size:clamp(1.15rem,1vw + .8rem,1.45rem);margin-bottom:.6rem}.hero.has-d #clear{order:-3;align-self:flex-start;margin:0 0 .7rem;min-height:32px}.hero.has-d #result{order:-2;margin:0 0 1rem}.hero.has-d .deck,.hero.has-d .deck-src{display:none}
.dock-card{border-left:3px solid var(--jump);padding:.1rem 0 .1rem .9rem}
.dk-kicker{font:600 .76rem var(--sans);letter-spacing:.08em;text-transform:uppercase;color:var(--ink-soft);margin:0}
.dk-name{font:800 1.45rem/1.12 var(--head);margin:.15rem 0 .6rem}
.dk-nums{display:grid;grid-template-columns:1fr 1fr;gap:.5rem 1rem;margin:0 0 .6rem}
.dk-nums div{border-top:1px solid var(--line);padding-top:.3rem}
.dk-nums dt{font:.78rem/1.25 var(--sans);color:var(--ink-soft)}
.dk-nums dd{margin:0;font:800 1.4rem/1.1 var(--head);font-variant-numeric:tabular-nums}
.dk-nums .j dd{color:var(--jump-ink)}
.dk-main{font-size:1rem;margin:.4rem 0 .5rem}
.dk-l{font:600 .82rem var(--sans);margin:.5rem 0 .1rem}
.dk-list{margin:0;padding-left:1.3rem;font:.86rem/1.4 var(--sans)}
.dk-list span{color:var(--ink-soft);font-variant-numeric:tabular-nums}
.dk-note{font:.78rem/1.35 var(--sans);color:var(--ink-soft);margin:.3rem 0}
.share-row{display:flex;align-items:center;gap:.4rem;flex-wrap:wrap;margin:.6rem 0 .2rem;font:.84rem var(--sans);color:var(--ink-soft)}
.share-row a,.share-row button{display:inline-grid;place-items:center;width:40px;height:40px;border-radius:50%;border:1px solid var(--line-soft);background:transparent;color:var(--ink);cursor:pointer;text-decoration:none}
.share-row a:hover,.share-row button:hover,.share-row a:focus-visible,.share-row button:focus-visible{border-color:var(--accent);color:var(--accent)}
@media (pointer:coarse){.share-row a,.share-row button{width:44px;height:44px}}
.share-row [role=status]{flex-basis:100%;min-height:1.1em;color:var(--ink)}

/* steps */
.step{min-height:92vh;display:flex;flex-direction:column;justify-content:center;padding:1.2rem 0}
.step-card{background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:1.05rem 1.15rem 1.1rem;opacity:.55;transition:opacity .3s}
.step.is-on .step-card{opacity:1}
.step h2{font:800 1.45rem/1.12 var(--head);margin:0 0 .55rem;text-wrap:balance}
.step h2 a,.s h2 a{text-decoration:none}
.step .yr{display:inline-block;font:700 .76rem/1 var(--sans);letter-spacing:.07em;text-transform:uppercase;color:var(--tag-ink);background:var(--tag);padding:.3rem .5rem .26rem;border-radius:2px;margin-bottom:.55rem}
.step p{margin:.55rem 0}
.step p:last-child{margin-bottom:0}
.fig{margin:.8rem 0 .2rem}
figcaption{font:.8rem/1.4 var(--sans);color:var(--ink-soft);margin-top:.35rem}
.chart{display:block;width:100%;height:auto;overflow:visible}
.chart .ax{stroke:var(--ink-soft);stroke-width:1}
.chart .ha{fill:var(--ride)}
.chart .hb{fill:var(--jump)}
.chart text{font:600 10.5px var(--sans);fill:var(--ink)}
.chart text.yr{fill:var(--ink-soft);font-weight:500}
.chart text.nm{text-anchor:end}
.chart text.nm.a{fill:var(--ride-ink)}.chart text.nm.b{fill:var(--jump-ink)}
.dock-hours{max-width:22rem}

/* sections after the map */
.s{padding:clamp(2.2rem,6vw,4rem) 1rem;border-top:1px solid var(--line)}
.wrap{max-width:44rem;margin:0 auto}
.wide{max-width:62rem;margin:0 auto}
.s h2{font:800 clamp(1.5rem,2.6vw,2rem)/1.1 var(--head);margin:0 0 .7rem;text-wrap:balance}
.s h3{font:700 1rem var(--sans);margin:1.4rem 0 .3rem}
.lede{font-size:1.06rem}
.more-rows{margin-top:.7rem}
.tbl-wrap{overflow-x:auto;margin-top:1rem}
table{border-collapse:collapse;width:100%;font:.9rem/1.35 var(--sans)}
th,td{text-align:left;padding:.42rem .6rem;border-bottom:1px solid var(--line-soft);vertical-align:top}
thead th{font-weight:600;border-bottom:2px solid var(--ink)}
tbody th{font-weight:600}
td.n,th.n{font-variant-numeric:tabular-nums;white-space:nowrap;text-align:right}
.src{font:.9rem/1.5 var(--sans)}
.src li{margin:.45rem 0}
#sources p{font-size:.98rem}
.foot-tfl{flex-basis:100%;text-align:center;font-size:.78rem}
.foot{padding:1.6rem 1rem 2.4rem;border-top:1px solid var(--line);font:.86rem var(--sans);color:var(--ink-soft);display:flex;flex-wrap:wrap;gap:.4rem 1.2rem;justify-content:center}

/* reading rail */
.rail{position:fixed;right:10px;top:50%;transform:translateY(-50%);z-index:20;display:none;flex-direction:column;gap:7px;padding:8px 5px}
.rail a{position:relative;width:8px;height:8px;border-radius:50%;border:1.5px solid var(--ink-soft);display:block}
.rail a[aria-current]{background:var(--accent);border-color:var(--accent)}
.rail a span{position:absolute;right:16px;top:50%;transform:translateY(-50%);white-space:nowrap;font:600 .74rem var(--sans);background:var(--ink);color:var(--bg);padding:.15rem .45rem;border-radius:3px;opacity:0;pointer-events:none}
.rail a:hover span,.rail a:focus-visible span{opacity:1}
@media (min-width:1100px){.rail{display:flex}}
.in-scrolly .rail{display:none}
@media print{.rail,.stage,.topbar{display:none}}

/* phone: the map keeps the top of the screen, the text passes below it */
@media (max-width:859px){
  .scrolly{display:block}
  .hero{min-height:0;padding-top:1.2rem;padding-bottom:1.1rem}
  .stage{height:40svh;border-left:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);z-index:5}
  .steps{padding-bottom:12vh}
  .step{min-height:64svh;justify-content:flex-start;padding-top:1.4rem}
  .step-card{opacity:1}
  .stage-bar{padding:.35rem .5rem;font-size:.72rem;gap:.3rem .5rem}
  .btn{min-height:34px;padding:.2rem .6rem;font-size:.76rem}
  #cap{display:none}
  #clock b{font-size:1.6rem}
  #clock-n{font-size:.7rem}
  #legend{font-size:.66rem;padding:.3rem .45rem;max-width:52%}
  #whole .lbl{display:none}
  #whole{padding:.2rem .55rem}
}
@media (prefers-reduced-motion:reduce){.step-card{transition:none}html{scroll-behavior:auto}}

/* a shared dock's own small page */
.d-page{max-width:36rem;margin:0 auto;padding:1.6rem 1rem 3rem}
.d-page h1{font-size:1.7rem}
.d-page img{display:block;width:100%;height:auto;border:1px solid var(--line);border-radius:4px;margin:1rem 0}
.d-go{display:inline-block;font:700 1rem var(--sans);background:var(--ink);color:var(--bg);padding:.7rem 1.1rem;border-radius:4px;text-decoration:none;margin-top:.6rem}
.nf main{max-width:36rem;margin:18vh auto;padding:0 1rem;font-family:var(--sans)}