@font-face{font-family:"Newsreader";font-style:normal;font-weight:400;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:400;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:"Atkinson";font-style:normal;font-weight:200 800;font-display:swap;src:url(fonts/AtkinsonHyperlegibleNext.woff2) format("woff2")}
@font-face{font-family:"IBM Plex Mono";font-style:normal;font-weight:400;font-display:swap;src:url(fonts/IBMPlexMono-Regular.woff2) format("woff2")}

:root{
  color-scheme:light;
  --bg:#f4f1ea;--bg-2:#e9e4d8;--card:#fbf9f4;
  --ink:#15191c;--ink-2:#3b4147;--muted:#454a50;
  --rule:#d4ccbb;--rule-2:#b9ae98;
  --link:#1b4c77;--accent:#862210;--mark:#1b4c77;
  --sky-top:#bcd2e3;--sky-low:#f0ede4;
  --land-near:#34402f;--land-mid:#66798a;--land-far:#b6c4d0;
  --ridge:#161b1f;--haze:#e6e9ea;--leader:#2a3036;
  --seen:#c2431f;--border-line:rgba(40,40,40,.55);
  --n0:#a39d92;--n1:#6f9cc0;--n2:#d58a1f;--n3:#b3321b;
  --edge:#6a3900;
  --serif:"Newsreader",Georgia,"Times New Roman",serif;
  --sans:"Atkinson",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,Menlo,monospace;
  --bar:3.1rem;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  color-scheme:dark;
  --bg:#0d1216;--bg-2:#151c22;--card:#121920;
  --ink:#eef1f3;--ink-2:#c3cbd2;--muted:#b2bcc5;
  --rule:#26313a;--rule-2:#3a4854;
  --link:#9ccaf2;--accent:#ff8a66;--mark:#9ccaf2;
  --sky-top:#03070d;--sky-low:#172638;
  --land-near:#07090c;--land-mid:#223344;--land-far:#6a86a2;
  --ridge:#c9d7e4;--haze:#27384a;--leader:#d5dde4;
  --seen:#ff7a50;--border-line:rgba(230,235,240,.5);
  --n0:#56606a;--n1:#4f86b3;--n2:#f0b04a;--n3:#ff6a3d;
  --edge:#ffb870;
}}
:root[data-theme="dark"]{
  color-scheme:dark;
  --bg:#0d1216;--bg-2:#151c22;--card:#121920;
  --ink:#eef1f3;--ink-2:#c3cbd2;--muted:#b2bcc5;
  --rule:#26313a;--rule-2:#3a4854;
  --link:#9ccaf2;--accent:#ff8a66;--mark:#9ccaf2;
  --sky-top:#03070d;--sky-low:#172638;
  --land-near:#07090c;--land-mid:#223344;--land-far:#6a86a2;
  --ridge:#c9d7e4;--haze:#27384a;--leader:#d5dde4;
  --seen:#ff7a50;--border-line:rgba(230,235,240,.5);
  --n0:#56606a;--n1:#4f86b3;--n2:#f0b04a;--n3:#ff6a3d;
  --edge:#ffb870;
}

*,*::before,*::after{box-sizing:border-box}
html{background:var(--bg);color:var(--ink);-webkit-text-size-adjust:100%;scroll-padding-top:calc(var(--bar) + .5rem)}
body{margin:0;background:var(--bg);color:var(--ink);font:400 1.075rem/1.62 var(--sans)}
a{color:var(--link);text-underline-offset:.18em;text-decoration-thickness:1px}
a:hover{text-decoration-thickness:2px}
:focus-visible{outline:2.5px solid var(--link);outline-offset:2px;border-radius:3px}
.skip{position:absolute;left:-999px;top:0;background:var(--ink);color:var(--bg);padding:.6rem 1rem;z-index:100}
.skip:focus{left:1rem;top:.5rem}
.sr{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.muted{color:var(--muted)}
.num{font-family:var(--mono);font-size:.92em;font-variant-numeric:tabular-nums;text-align:right}
[hidden]{display:none!important}

/* top bar */
.topbar{position:sticky;top:0;z-index:30;display:flex;align-items:center;gap:1rem;height:var(--bar);padding:0 clamp(1rem,3vw,2rem);
  background:color-mix(in srgb,var(--bg) 92%,transparent);backdrop-filter:blur(8px);border-bottom:1px solid var(--rule)}
.home{font:600 .95rem/1 var(--sans);color:var(--ink);text-decoration:none;white-space:nowrap}
.topnav{display:flex;gap:1.1rem;overflow-x:auto;scrollbar-width:none;min-width:0}
.topnav::-webkit-scrollbar{display:none}
.topnav a{font-size:.92rem;color:var(--ink-2);text-decoration:none;white-space:nowrap;padding:.35rem 0;border-bottom:2px solid transparent}
.topnav a[aria-current]{color:var(--ink);border-bottom-color:var(--accent)}
.spacer{flex:1}
.chip{font-size:.88rem;color:var(--ink);text-decoration:none;border:1px solid var(--rule-2);border-radius:999px;padding:.25rem .7rem;white-space:nowrap}
.icon-btn{display:grid;place-items:center;width:2.25rem;height:2.25rem;border-radius:50%;border:1px solid var(--rule-2);background:transparent;color:var(--ink);cursor:pointer;flex:none}
.icon-btn svg{display:block}
.icon-btn svg[hidden]{display:none}

/* reading rail */
.rail{display:none}
@media (min-width:76rem){
  .rail{display:flex;flex-direction:column;gap:.9rem;position:fixed;right:1.4rem;top:50%;transform:translateY(-50%);z-index:25}
  .rail a{display:flex;align-items:center;justify-content:flex-end;gap:.6rem;text-decoration:none;color:var(--ink-2);height:1rem}
  .rail a span{font-size:.8rem;opacity:0;transition:opacity .15s;background:var(--bg);padding:0 .3rem;border-radius:.2rem}
  .rail a:hover span,.rail a:focus-visible span{opacity:1}
  .rail i{display:block;width:6px;height:6px;border-radius:50%;background:var(--rule-2);transition:transform .15s}
  .rail a[aria-current] i{background:var(--accent);transform:scale(1.45)}
}
@media print{.rail{display:none}}

/* opening */
.opening{max-width:74rem;margin:0 auto;padding:clamp(1.8rem,5vw,3.6rem) clamp(1rem,3vw,2rem) 1.2rem;display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:1.5rem 3rem;align-items:end}
h1{font:400 clamp(2.7rem,7.4vw,5.6rem)/.98 var(--serif);letter-spacing:-.018em;margin:0;text-wrap:balance}
.deck{font:400 clamp(1.14rem,1.9vw,1.36rem)/1.5 var(--serif);color:var(--ink-2);margin:0;max-width:34rem}
.deck b{color:var(--ink);font-weight:400;background:linear-gradient(transparent 62%,color-mix(in srgb,var(--accent) 24%,transparent) 62%)}

/* finder */
.finder{max-width:74rem;margin:0 auto;padding:.4rem clamp(1rem,3vw,2rem) 1rem;display:flex;flex-wrap:wrap;gap:.8rem 1.2rem;align-items:end}
.field{display:flex;flex-direction:column;gap:.3rem;min-width:0}
.field label,.field .lab{font-size:.82rem;letter-spacing:.02em;color:var(--muted)}
.where{flex:1 1 20rem;position:relative}
.where input{width:100%;font:400 1.2rem/1.3 var(--sans);color:var(--ink);background:var(--card);border:1.5px solid var(--rule-2);border-radius:.6rem;padding:.65rem .9rem}
.where input:focus{border-color:var(--link);outline:none;box-shadow:0 0 0 3px color-mix(in srgb,var(--link) 25%,transparent)}
.where ul{position:absolute;top:100%;left:0;right:0;z-index:20;margin:.3rem 0 0;padding:.3rem;list-style:none;background:var(--card);border:1px solid var(--rule-2);border-radius:.6rem;box-shadow:0 10px 30px rgba(0,0,0,.18);max-height:22rem;overflow:auto}
.where li{padding:.5rem .7rem;border-radius:.4rem;cursor:pointer}
.where li[aria-selected="true"],.where li:hover{background:var(--bg-2)}
select{font:400 1rem/1.2 var(--sans);color:var(--ink);background:var(--card);border:1.5px solid var(--rule-2);border-radius:.6rem;padding:.6rem 2rem .6rem .7rem;appearance:none;
  background-image:linear-gradient(45deg,transparent 50%,currentColor 50%),linear-gradient(135deg,currentColor 50%,transparent 50%);
  background-position:calc(100% - 1rem) 55%,calc(100% - .7rem) 55%;background-size:.3rem .3rem;background-repeat:no-repeat}
select:disabled{opacity:.6}
.quick{max-width:74rem;margin:0 auto;padding:0 clamp(1rem,3vw,2rem) .8rem;display:flex;flex-wrap:wrap;gap:.45rem;align-items:center;font-size:.9rem;color:var(--muted)}
.quick button{font:inherit;color:var(--ink);background:transparent;border:1px solid var(--rule-2);border-radius:999px;padding:.28rem .75rem;cursor:pointer}
.quick button:hover{border-color:var(--ink-2)}
.note-h{font-size:.85rem;color:var(--muted);margin:.2rem 0 0}

/* panorama */
.stage{position:relative;margin:0;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);background:var(--sky-low)}
#pano{display:block;width:100%;height:clamp(17rem,36vw,27rem);touch-action:pan-y;cursor:grab}
#pano:active{cursor:grabbing}
#labels{position:absolute;inset:0;pointer-events:none;overflow:hidden}
.plabel{position:absolute;left:0;top:0;transform:translate(calc(var(--x) - 50%),var(--y));pointer-events:auto;
  display:flex;flex-direction:column;align-items:center;gap:0;padding:.1rem .35rem;border:0;border-radius:.3rem;cursor:pointer;
  background:color-mix(in srgb,var(--sky-low) 72%,transparent);color:var(--ink);opacity:var(--o,1);white-space:nowrap;font-family:var(--sans)}
.plabel .n{font-size:.8rem;line-height:1.15}
.plabel.big .n{font-weight:700}
.plabel .m{font:400 .66rem/1.2 var(--mono);color:var(--ink-2)}
.plabel.on{background:var(--ink);color:var(--bg);opacity:1}
.plabel.on .m{color:var(--bg)}
.stage-bar{display:flex;align-items:center;gap:.5rem;padding:.5rem clamp(.6rem,2vw,1.2rem);background:var(--bg);border-top:1px solid var(--rule);flex-wrap:wrap}
.stage-bar .btn{min-width:2.5rem}
.btn{font:600 .92rem/1 var(--sans);color:var(--ink);background:var(--card);border:1.5px solid var(--rule-2);border-radius:.5rem;padding:.55rem .8rem;cursor:pointer}
.btn:hover{border-color:var(--ink-2)}
.btn.small{font-size:.86rem;padding:.4rem .7rem}
#strip{display:block;flex:1 1 14rem;height:2.6rem;min-width:10rem;border:1px solid var(--rule);border-radius:.35rem;cursor:pointer}
.ctl{display:flex;align-items:center;gap:.4rem;font-size:.85rem;color:var(--muted)}
.ctl select{padding:.4rem 1.8rem .4rem .55rem;font-size:.9rem}
#status{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);font:400 1rem/1.3 var(--sans);color:var(--ink);background:var(--card);padding:.6rem 1rem;border-radius:.5rem;border:1px solid var(--rule)}
#status:empty{display:none}
[data-state="busy"] #pano{opacity:.55;transition:opacity .2s}
[data-state="preview"] #pano{opacity:.85}
.readout{max-width:74rem;margin:0 auto;padding:1.1rem clamp(1rem,3vw,2rem) 0;display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:1rem 2.5rem}
#summary{font:400 clamp(1.1rem,1.7vw,1.3rem)/1.5 var(--serif);margin:0}
#summary b{font-weight:400;border-bottom:2px solid var(--accent)}
#detail{background:var(--card);border:1px solid var(--rule);border-left:3px solid var(--accent);border-radius:.4rem;padding:.7rem 1rem;font-size:.97rem}
#detail p{margin:.2rem 0}
.edge{color:var(--edge)}

/* article */
main section{scroll-margin-top:calc(var(--bar) + .6rem)}
.prose{max-width:41rem;margin:0 auto;padding:0 clamp(1rem,3vw,2rem)}
.wide{max-width:74rem;margin:0 auto;padding:0 clamp(1rem,3vw,2rem)}
.sec{padding:clamp(2.6rem,6vw,4.6rem) 0 0}
h2{font:400 clamp(1.8rem,3.6vw,2.6rem)/1.1 var(--serif);letter-spacing:-.01em;margin:0 0 .9rem;text-wrap:balance}
h3{font:700 1.08rem/1.3 var(--sans);margin:1.6rem 0 .4rem}
.prose p{margin:0 0 1rem;font:400 1.14rem/1.62 var(--serif)}
.claim p,.line p,.method dd,.sources li{font-family:var(--serif);font-size:1.04rem}
.big-number span{font-family:var(--serif)}
.lede{font:400 1.2rem/1.55 var(--serif)}
figure{margin:1.4rem 0}
figcaption{font:400 .95rem/1.5 var(--serif);color:var(--muted);margin-top:.5rem}
figcaption .cr{display:block;font-size:.82rem;margin-top:.2rem}
.mapwrap{position:relative}
canvas.map{display:block;width:100%;height:auto;border-radius:.4rem;border:1px solid var(--rule);cursor:crosshair;background:var(--bg-2)}
#national{cursor:pointer}
#nat-tip{position:absolute;left:0;top:0;transform:translate(var(--tx),var(--ty));background:var(--card);border:1px solid var(--rule-2);border-radius:.4rem;padding:.45rem .65rem;font-size:.86rem;line-height:1.4;pointer-events:none;box-shadow:0 6px 20px rgba(0,0,0,.18);max-width:15rem}
.legend{display:flex;flex-wrap:wrap;gap:.4rem 1.1rem;font-size:.88rem;color:var(--ink-2);margin:.7rem 0;align-items:center}
.legend i{display:inline-block;width:.8rem;height:.8rem;border-radius:50%;vertical-align:-.08rem;margin-right:.35rem}
.legend .k0{background:var(--n0)}.legend .k1{background:var(--n1)}.legend .k2{background:var(--n2)}.legend .k3{background:var(--n3);outline:1px solid var(--rule-2)}
.legend .seen{background:var(--seen);border-radius:2px}
.legend .ray{background:var(--mark);height:2px;width:1.2rem;border-radius:0;vertical-align:.2rem}
.seg{display:inline-flex;border:1.5px solid var(--rule-2);border-radius:.5rem;overflow:hidden}
.seg label{padding:.35rem .7rem;cursor:pointer;font-size:.9rem}
.seg input{position:absolute;opacity:0}
.seg input:checked+span{font-weight:700}
.seg label:has(input:checked){background:var(--ink);color:var(--bg)}
.seg label:has(input:focus-visible){outline:2.5px solid var(--link);outline-offset:-3px}

.big-number{display:grid;grid-template-columns:repeat(auto-fit,minmax(13rem,1fr));gap:1rem 2rem;margin:1.4rem 0 1.8rem}
.big-number div{border-top:2px solid var(--ink);padding-top:.5rem}
.big-number b{display:block;font:400 clamp(2.2rem,4.4vw,3.2rem)/1 var(--serif)}
.big-number span{font-size:1rem;line-height:1.4;color:var(--ink-2);display:block;margin-top:.35rem}

table{border-collapse:collapse;width:100%;font-size:.95rem}
caption{text-align:left;font-size:.9rem;color:var(--muted);padding:.4rem 0}
th,td{padding:.42rem .5rem;border-bottom:1px solid var(--rule);text-align:left;vertical-align:baseline}
thead th{font-size:.8rem;color:var(--muted);font-weight:600;border-bottom:1.5px solid var(--rule-2)}
tbody th{font-weight:400}
.linkish{font:inherit;color:var(--link);background:none;border:0;padding:0;cursor:pointer;text-align:left;text-decoration:underline;text-underline-offset:.18em;text-decoration-thickness:1px}
details.list{margin:1.2rem 0 0}
details.list summary{cursor:pointer;font-weight:600;padding:.4rem 0}
.tablewrap{overflow-x:auto}
.more{margin:.8rem 0}

/* long lines */
.lines{display:grid;gap:2.6rem;margin-top:1.6rem}
.line{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.6fr);gap:1rem 2.2rem;align-items:start}
.line h3{margin-top:0;font:400 1.45rem/1.2 var(--serif)}
.line .km{font:400 clamp(2.4rem,4.6vw,3.4rem)/1 var(--serif);display:block;margin-bottom:.3rem}
.line p{margin:.3rem 0 .7rem}
.profile svg{display:block;width:100%;height:auto;overflow:visible}
.profile .terrain{fill:var(--land-mid)}
.profile .bulge{fill:var(--bg-2);stroke:var(--rule-2);stroke-width:1}
.profile .note{font:400 11.5px var(--sans);fill:var(--ink-2)}
.profile .earth{fill:none;stroke:var(--rule-2);stroke-width:1;stroke-dasharray:3 3}
.profile .sight{fill:none;stroke:var(--accent);stroke-width:1.6}
.profile .tick{font:400 11px var(--mono);fill:var(--muted)}
.profile .tag{font:600 12px var(--sans);fill:var(--ink)}
.profile .dot{fill:var(--accent)}
.profile .graze{fill:none;stroke:var(--ink);stroke-width:1}
.flag{display:inline-block;font-size:.8rem;font-weight:700;letter-spacing:.02em;border:1px solid currentColor;border-radius:.3rem;padding:.05rem .4rem;color:var(--edge);vertical-align:.15rem}
.flag.ok{color:var(--ink-2)}

/* claims */
.claims{display:grid;grid-template-columns:repeat(auto-fit,minmax(16rem,1fr));gap:1rem;margin-top:1.4rem}
.claim{border-top:2px solid var(--ink);padding-top:.6rem}
.claim h3{margin:0 0 .3rem;font:400 1.25rem/1.25 var(--serif)}
.claim .v{font:700 .82rem/1 var(--sans);letter-spacing:.06em;text-transform:uppercase;color:var(--accent);display:block;margin-bottom:.4rem}
.claim p{margin:0 0 .5rem;font-size:.98rem}

/* photo */
.photo{position:relative;margin:1.4rem 0}
.photo .frame{position:relative;border-radius:.4rem;overflow:hidden;border:1px solid var(--rule)}
.photo img{display:block;width:100%;height:auto}
.photo svg{position:absolute;inset:0;width:100%;height:100%}
.photo .sky{fill:none;stroke:#ff4d2e;stroke-width:2.2;vector-effect:non-scaling-stroke}
.photo .pk{font-family:var(--sans);font-weight:700;fill:#10161b;paint-order:stroke;stroke:#fff;stroke-linejoin:round}
.photo .pl{stroke:#10161b;stroke-width:1;vector-effect:non-scaling-stroke}
.toggle{margin:.6rem 0 0}

/* air */
.air{display:grid;grid-template-columns:repeat(2,1fr);gap:.9rem 1rem;margin:1.2rem 0}
.air canvas{width:100%;height:auto;display:block;border-radius:.3rem;border:1px solid var(--rule)}
.air figcaption{margin-top:.25rem;font-size:.82rem}

.method dt{font-weight:700;margin-top:1rem}
.method dd{margin:.2rem 0 0}
.sources li{margin:.4rem 0;font-size:.95rem}
footer{margin-top:4rem;border-top:1px solid var(--rule);padding:1.6rem clamp(1rem,3vw,2rem) 2.6rem;font-size:.9rem;color:var(--muted)}
footer .wide{display:flex;flex-wrap:wrap;gap:.6rem 1.6rem;justify-content:space-between}
.noscript{background:var(--card);border:1px solid var(--rule);padding:.8rem 1rem;border-radius:.4rem;max-width:74rem;margin:1rem auto}
.failed-note{display:none}
[data-state="failed"] .failed-note{display:block}

@media (max-width:860px){
  .opening{grid-template-columns:1fr;gap:1rem}
  .readout{grid-template-columns:1fr}
  .line{grid-template-columns:1fr}
  .air{grid-template-columns:1fr}
  .topnav a:nth-child(n+4){display:none}
}
@media (max-width:520px){
  .topnav{display:none}
  .opening{padding-top:1.4rem}
  .deck{font-size:1.08rem}
  .finder{flex-wrap:nowrap}
  .finder .where{flex:1 1 60%}
  .finder .field:not(.where){flex:0 1 40%}
  .finder select{width:100%;font-size:.92rem;padding-right:1.6rem}
  .quick{flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;padding-bottom:.6rem}
  .quick::-webkit-scrollbar{display:none}
  .quick button{flex:none}
  .ctl span{font-size:.78rem}
}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
@media print{.topbar,.stage-bar,.finder,.quick{display:none}}