/* London's protected views. Identity: a surveyor's sheet by day (drafting paper, blue-black ink, a red sightline),
   the city after dark by night (postcode points as lights, the lines as beams). One colour per landmark:
   vermilion for St Paul's, Commons green for the Palace of Westminster, blue for the Tower. The canvases read the same tokens. */
@font-face{font-family:"Fraunces";font-style:normal;font-weight:100 900;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+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Fraunces";font-style:normal;font-weight:100 900;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}
@font-face{font-family:"IBM Plex Mono";font-weight:400;font-style:normal;font-display:swap;src:url("fonts/ibmplexmono-400-lat.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:"IBM Plex Mono";font-weight:400;font-style:normal;font-display:swap;src:url("fonts/ibmplexmono-400-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:#f2efe6;--surface:#faf8f2;--ink:#16202b;--ink-soft:#434f5b;--line:#cdc7b6;--line-soft:#e1dccd;
  --accent:#a8271a;--tag:#16202b;--tag-ink:#f2efe6;
  --map-bg:#eae7dc;--water:#a8c6d8;--green:#cfdbb8;--speck:rgba(22,32,43,.40);
  --l-sp:#c8321f;--l-pw:#1b7446;--l-tw:#3352b8;--you:#16202b;
  --sec-bg:#f6f3ea;--sec-ground:#8a836f;--sec-roofs:#cfc8b4;
  --display:"Fraunces",Georgia,serif;--serif:"Source Serif 4",Georgia,"Times New Roman",serif;--sans:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",sans-serif;--mono:"IBM Plex Mono",ui-monospace,Menlo,monospace;
  --bar:44px;color-scheme:light;
}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]){
  --bg:#0d1218;--surface:#151c25;--ink:#eef0ea;--ink-soft:#b6bfc7;--line:#2e3945;--line-soft:#1f2832;
  --accent:#ff9a78;--tag:#eef0ea;--tag-ink:#0d1218;
  --map-bg:#090e14;--water:#17344d;--green:#14251a;--speck:rgba(255,226,170,.44);
  --l-sp:#ff7a52;--l-pw:#5fd08f;--l-tw:#8ea6ff;--you:#ffd34d;
  --sec-bg:#101720;--sec-ground:#566170;--sec-roofs:#27313d;
  color-scheme:dark}}
:root[data-theme=dark]{
  --bg:#0d1218;--surface:#151c25;--ink:#eef0ea;--ink-soft:#b6bfc7;--line:#2e3945;--line-soft:#1f2832;
  --accent:#ff9a78;--tag:#eef0ea;--tag-ink:#0d1218;
  --map-bg:#090e14;--water:#17344d;--green:#14251a;--speck:rgba(255,226,170,.44);
  --l-sp:#ff7a52;--l-pw:#5fd08f;--l-tw:#8ea6ff;--you:#ffd34d;
  --sec-bg:#101720;--sec-ground:#566170;--sec-roofs:#27313d;
  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(--l-sp);text-underline-offset:.16em;text-decoration-thickness:.09em}
a:hover{text-decoration-thickness:.16em}
:focus-visible{outline:2px solid var(--l-sp);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 */
.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;color:var(--l-sp)}
.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(--l-sp);transform-origin:0 50%;transform:scaleX(0)}
@media (max-width:640px){.topnav{display:none}}

/* scrolly: text column, and the pinned stage with the map above the side view */
.scrolly{display:grid;grid-template-columns:minmax(0,28rem) minmax(0,1fr);grid-template-areas:"hero stage" "steps stage";column-gap:0}
.hero{grid-area:hero;padding:clamp(1.4rem,4.5vh,3rem) 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;display:grid;grid-template-rows:minmax(0,1fr) clamp(150px,31%,270px) auto}
.stage-map{position:relative;min-height:0}
.stage-sec{position:relative;min-height:0;border-top:1px solid var(--line);background:var(--sec-bg)}
#map,#sec{display:block;width:100%;height:100%}
#map{touch-action:pan-y}
.stage-fallback{position:absolute;inset:0;display:none;place-items:center;padding:2rem;text-align:center;color:var(--ink-soft);font-family:var(--sans);background:var(--map-bg)}
.map-failed .stage-fallback{display:grid}
.stage-bar{display:flex;align-items:center;gap:.6rem;padding:.45rem .7rem;font-family:var(--sans);font-size:.8rem;background:var(--sec-bg);border-top:1px solid var(--line-soft);min-height:48px}
#cap{flex:1;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(--l-sp)}
.btn .ic-pause{display:none}.btn[data-on=true] .ic-pause{display:block}.btn[data-on=true] .ic-play{display:none}
#chip{position:absolute;left:.7rem;top:.7rem;max-width:calc(100% - 1.4rem);display:flex;flex-wrap:wrap;align-items:baseline;gap:.1rem .6rem;padding:.4rem .7rem;background:var(--surface);color:var(--ink);border:1px solid var(--ink);border-left:5px solid var(--l-sp);border-radius:3px;font-family:var(--sans);font-size:.84rem}
#chip[data-lm=westminster]{border-left-color:var(--l-pw)}#chip[data-lm=tower]{border-left-color:var(--l-tw)}
#chip b{font-weight:700}
#chip span{font-family:var(--mono);font-size:.8rem;color:var(--ink-soft)}
#chip a{font-weight:600}

.kicker{font:600 .78rem var(--sans);letter-spacing:.09em;text-transform:uppercase;color:var(--ink-soft);margin:0 0 .7rem}
h1{font:620 clamp(2rem,2.6vw + .9rem,2.9rem)/1.04 var(--display);font-variation-settings:"opsz" 96;letter-spacing:-.012em;margin:0 0 .9rem;text-wrap:balance}
.deck{font-size:1.1rem;line-height:1.5;margin:0 0 1rem}
.deck b{font-weight:650}
.deck-src{font:.84rem/1.4 var(--sans);color:var(--ink-soft);margin:-.5rem 0 1.2rem}
.hero.has-d .deck-src{display:none}

/* the reader's postcode */
.pc label{font:600 .84rem var(--sans);display:block;margin-bottom:.3rem}
.pc-form{display:flex;gap:.5rem;align-items:stretch;margin:.2rem 0 .4rem}
.pc-in{flex:1;min-width:0;font:400 1.25rem/1 var(--mono);letter-spacing:.04em;text-transform:uppercase;padding:.5rem .7rem;border:2px solid var(--ink);border-radius:4px;background:var(--surface);color:var(--ink);height:52px}
.pc-in::placeholder{color:var(--ink-soft);opacity:.85;text-transform:none;font:400 1rem var(--sans);letter-spacing:0}
.pc-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:52px}
.pc-go:hover{background:var(--surface);color:var(--ink)}
.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:400 .9rem var(--mono);background:transparent;border:1px solid var(--line);border-radius:3px;color:var(--ink);padding:.2rem .5rem;min-height:32px;cursor:pointer}
.egs button:hover{border-color:var(--ink)}
#pc-msg{font:.86rem var(--sans);color:var(--ink);min-height:1.2em;margin:.3rem 0 0}
#result{margin-top:.6rem;padding:.2rem 0 0 .9rem;border-left:3px solid var(--l-sp)}
/* arriving from a shared link: the result comes straight after the headline */
.hero.has-d .kicker{order:-3}.hero.has-d h1{order:-2;font-size:clamp(1.5rem,1.6vw + .8rem,2rem)}.hero.has-d #result{order:-1;margin:0 0 1rem}.hero.has-d .deck{display:none}.hero.has-d #whole{order:-1;align-self:flex-start;margin:0 0 1.2rem}
.res-main{font-size:1.1rem;margin:.2rem 0 .5rem}
.res-main b{font-weight:680}
.res-rule{font:.93rem/1.45 var(--sans);margin:.4rem 0}
.res-also{font:.88rem/1.45 var(--sans);color:var(--ink-soft);margin:.4rem 0}
.res-note{font:.8rem/1.45 var(--sans);color:var(--ink-soft);margin:.5rem 0 .2rem}
.res-more{font:.88rem var(--sans);margin:.5rem 0 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);background:transparent;color:var(--ink);cursor:pointer;text-decoration:none}
.share-row a:hover,.share-row button:hover{border-color:var(--ink)}
@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)}
.whole{margin-top:.5rem}

/* 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:4px;padding:1.05rem 1.15rem 1.1rem;opacity:.55;transition:opacity .3s}
.step.is-on .step-card,.no-js .step-card{opacity:1}
.step h2{font:620 1.55rem/1.1 var(--display);font-variation-settings:"opsz" 60;letter-spacing:-.008em;margin:0 0 .55rem;text-wrap:balance}
.step h2 a,.s h2 a{text-decoration:none}
.step .tag{display:inline-block;font:400 .78rem/1 var(--mono);letter-spacing:.04em;color:var(--tag-ink);background:var(--tag);padding:.26rem .5rem .24rem;border-radius:2px;margin-bottom:.6rem}
.step p{margin:.55rem 0}
.step p:last-child{margin-bottom:0}
.fine{font:.82rem/1.4 var(--sans);color:var(--ink-soft)}

/* 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:66rem;margin:0 auto}
.s h2{font:620 clamp(1.6rem,2.4vw + .6rem,2.1rem)/1.08 var(--display);font-variation-settings:"opsz" 72;letter-spacing:-.01em;margin:0 0 .7rem;text-wrap:balance}
.s h3{font:700 1rem var(--sans);margin:1.4rem 0 .3rem}
.lede{font-size:1.08rem;max-width:46rem}
.vfigs{margin:1.4rem 0 1.6rem;overflow-x:auto;padding-bottom:.4rem}
.vfig{margin:0 0 .5rem;min-width:620px}
.vfig svg{display:block;height:auto;overflow:visible}
.vfig figcaption{font:.82rem/1.3 var(--sans);color:var(--ink-soft);margin:.1rem 0 .5rem}
.pf-roofs{fill:var(--sec-roofs)}.pf-ground{fill:var(--sec-ground)}
.pf-lim{fill:none;stroke:var(--l-sp);stroke-width:1.6;vector-effect:non-scaling-stroke}
.pf-bg{stroke-dasharray:5 4}
.pf-lm{stroke:var(--ink-soft);stroke-width:1;stroke-dasharray:2 3;vector-effect:non-scaling-stroke}
[data-lm=westminster] .pf-lim{stroke:var(--l-pw)}[data-lm=tower] .pf-lim{stroke:var(--l-tw)}
.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:.45rem .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;border-left:4px solid var(--l-sp);min-width:13rem}
tr[data-lm=westminster] th{border-left-color:var(--l-pw)}tr[data-lm=tower] th{border-left-color:var(--l-tw)}
.spot{display:block;font-weight:400;color:var(--ink-soft);font-size:.82rem}
td.n{font-family:var(--mono);font-size:.84rem;white-space:nowrap}
.src{font:.9rem/1.5 var(--sans);padding-left:1.1rem}
.src li{margin:.45rem 0}
.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;background:color-mix(in srgb,var(--bg) 82%,transparent);border-radius:999px}
.rail a{position:relative;width:9px;height:9px;border-radius:50%;border:1.5px solid var(--ink-soft);display:block}
.rail a[aria-current]{background:var(--l-sp);border-color:var(--l-sp)}
.rail a span{position:absolute;right:18px;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}}
/* beside the pinned stage there is no gutter: the rail waits until the stage has scrolled away */
.in-scrolly .rail{display:none}
@media (min-width:860px){.in-scrolly .to-top-x.left{left:auto;right:max(1rem,env(safe-area-inset-right));bottom:calc(4.4rem + env(safe-area-inset-bottom))}}
@media print{.rail,.stage,.topbar{display:none}}

/* phone: text first, then the stage pinned above the steps */
@media (max-width:859px){
  .scrolly{display:block}
  .hero{min-height:0;padding-top:1.3rem;padding-bottom:1.2rem}
  .deck-src{order:5;margin:.9rem 0 0}
  .stage{height:56svh;border-left:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);z-index:5;grid-template-rows:minmax(0,1fr) 36% auto}
  .steps{padding-bottom:12vh}
  .step{min-height:58svh;justify-content:flex-start;padding-top:1.4rem}
  .step-card{opacity:1}
  .stage-bar{padding:.3rem .5rem;font-size:.72rem;min-height:40px}
  .btn{min-height:34px;padding:.2rem .6rem;font-size:.76rem}
  #chip{font-size:.78rem;padding:.3rem .5rem}
  #whole2 .lbl{display:none}
  #play-label{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
  #whole2,#play{padding:.2rem .6rem}
  .share-row>span:first-child{flex-basis:100%}
}
@media (prefers-reduced-motion:reduce){.step-card{transition:none}html{scroll-behavior:auto}}

/* a shared result'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)}