/* busola-de-pe-pista: an aeronautical chart by day (cream land, magenta isogonic lines), runway lights at night. */
:root{
  --bg:#efe9dc; --bg2:#e6dfcf; --surface:#f8f4ea; --ink:#18202e; --ink2:#2a3242; --muted:#434b5b; --line:#c4baa5; --line-soft:#d6ccb8;
  --acc:#8e1257; --acc-ink:#7d0f4c; --focus:#1f4fd1; --tip-bg:#18202e; --tip-ink:#f6f1e6; --card:rgba(248,244,234,.94); --kick:#7d0f4c;
  --motif-paint:#f8f4ea; --motif-needle:#b0186b;
  --g-ocean:#d6e1e4; --g-land:#f4eedf; --g-coast:#b6ab93; --g-grat:rgba(60,70,90,.10); --g-rim:rgba(60,70,90,.10);
  --g-iso:#b0186b; --g-iso0:#6d0a40; --g-paint:#b36b00; --g-ok:#1a2540; --g-old:#d1420a; --g-true:#0b7a48; --g-odd:rgba(80,80,90,.45);
  --g-wind:rgba(14,124,134,.55); --g-down:#1d55c8; --g-up:#c2187a; --g-lab:#18202e; --g-halo:rgba(244,238,223,.92);
  --to-top-bg:#efe9dc; --to-top-fg:#18202e;
  --disp:"Fraunces",Georgia,serif; --serif:"Source Serif 4",Georgia,serif; --ui:"IBM Plex Sans",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;
  --vh:1vh; --stage-h:calc(var(--vh) * 100 - 44px);
  color-scheme:light;
}
html.dark{
  --bg:#060a14; --bg2:#0b1120; --surface:#0f1626; --ink:#eaeef6; --ink2:#d3d9e6; --muted:#b4bdcf; --line:#2a3550; --line-soft:#1c2640;
  --acc:#ff8fc8; --acc-ink:#ffa6d4; --focus:#9db8ff; --tip-bg:#eaeef6; --tip-ink:#060a14; --card:rgba(8,13,26,.86); --kick:#ffb0d8;
  --motif-paint:#060a14; --motif-needle:#ff6fb7;
  --g-ocean:#070d1a; --g-land:#131d33; --g-coast:#26365a; --g-grat:rgba(140,170,220,.07); --g-rim:rgba(120,160,255,.14);
  --g-iso:#ff5fb2; --g-iso0:#ffc6e3; --g-paint:#ffd166; --g-ok:#fff0c8; --g-old:#ff7a2f; --g-true:#4ade80; --g-odd:rgba(120,130,155,.45);
  --g-wind:rgba(45,212,191,.42); --g-down:#60a5fa; --g-up:#f472b6; --g-lab:#eaeef6; --g-halo:rgba(6,10,20,.86);
  --to-top-bg:#060a14; --to-top-fg:#eaeef6;
  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 1.1rem/1.62 var(--serif);text-rendering:optimizeLegibility}
a{color:var(--acc-ink);text-underline-offset:.18em;text-decoration-thickness:1px}
a:hover{text-decoration-thickness:2px}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px;border-radius:4px}
.skip{position:absolute;left:-9999px;top:0;background:var(--ink);color:var(--bg);padding:.5rem 1rem;z-index:50}
.skip:focus{left:8px;top:8px}
h1,h2,h3{font-family:var(--disp);font-weight:500;letter-spacing:-.012em;line-height:1.12;margin:0 0 .55em}
h1{font-size:clamp(1.9rem,2.6vw + .9rem,3.05rem);font-variation-settings:"opsz" 130;font-weight:430;text-wrap:balance}
h2{font-size:clamp(1.35rem,1.2vw + 1rem,1.85rem);font-variation-settings:"opsz" 72;text-wrap:balance;position:relative}
h3{font-size:1.18rem;margin-top:1.5em}
p{margin:0 0 1em}
.nw{white-space:nowrap}
.anchor{position:absolute;left:-1.1em;opacity:0;text-decoration:none;color:var(--muted);font-weight:400}
h2:hover .anchor,.anchor:focus{opacity:1}
.kicker{font:600 .78rem/1.35 var(--ui);letter-spacing:.07em;text-transform:uppercase;color:var(--kick);margin:0 0 .9rem}
.kicker a{color:inherit}
.note{font:400 .88rem/1.5 var(--ui);color:var(--muted)}
.wrap{max-width:42rem;margin:0 auto;padding:0 16px}

/* topbar: slim, takes the night colours */
.topbar{position:sticky;top:0;z-index:30;display:flex;align-items:center;gap:.9rem;height:44px;padding:0 max(16px,env(safe-area-inset-left));background:color-mix(in srgb,var(--bg) 90%,transparent);border-bottom:1px solid var(--line-soft);font:500 .88rem/1 var(--ui)}
.topbar .home{display:flex;align-items:center;gap:.45rem;color:var(--ink);text-decoration:none;white-space:nowrap}
.topbar .home .motif{width:22px;height:22px;color:var(--ink)}
.topnav{display:flex;gap:1rem;overflow:hidden;min-width:0}
.topnav a{color:var(--ink2);text-decoration:none;white-space:nowrap}
.topnav a:hover{color:var(--ink);text-decoration:underline}
.spacer{flex:1}
.chip{color:var(--ink);text-decoration:none;border:1px solid var(--line);border-radius:999px;padding:.36rem .7rem;min-height:32px;display:inline-flex;align-items:center}
.icon-btn{display:grid;place-items:center;width:36px;height:36px;border-radius:50%;border:1px solid var(--line);background:transparent;color:var(--ink);cursor:pointer}
.progress{position:absolute;left:0;right:0;bottom:-1px;height:2px}
.progress i{display:block;height:100%;width:100%;background:linear-gradient(90deg,var(--g-iso),var(--g-paint));transform-origin:0 50%;transform:scaleX(0)}
@media (max-width:980px){.topnav{display:none}}
@media (pointer:coarse){.icon-btn{width:44px;height:44px}.chip{min-height:44px}}

/* rail: a hairline of dots at the far edge */
.rail{position:fixed;right:8px;top:50%;transform:translateY(-50%);z-index:20;display:flex;flex-direction:column;gap:6px;opacity:.75}
.rail-dot{position:relative;display:block;width:14px;height:14px}
.rail-dot .dot{position:absolute;inset:5px;border-radius:50%;background:var(--line)}
.rail-dot[aria-current] .dot{background:var(--acc);inset:4px}
.rail-label{position:absolute;right:22px;top:50%;transform:translateY(-50%);white-space:nowrap;font:500 .78rem/1 var(--ui);background:var(--tip-bg);color:var(--tip-ink);padding:.35rem .5rem;border-radius:4px;opacity:0;pointer-events:none}
.rail-dot:hover .rail-label,.rail-dot:focus .rail-label{opacity:1}
@media (max-width:1180px){.rail{display:none}}

/* the story: a pinned globe, text passing beside it (desktop) or below it (phone) */
.story{position:relative;display:grid;grid-template-columns:minmax(0,26rem) minmax(0,1fr);min-width:0;grid-template-areas:"steps stage"}
.stage{grid-area:stage;position:sticky;top:44px;height:var(--stage-h);margin:0;overflow:hidden;background:radial-gradient(120% 90% at 60% 45%,var(--bg2),var(--bg))}
.stage canvas{display:block;width:100%;height:100%;cursor:grab}
.stage canvas:active{cursor:grabbing}
.steps{grid-area:steps;position:relative;z-index:2;padding:0 0 30vh 0;min-width:0}
.step{min-height:calc(var(--vh) * 92);display:flex;align-items:center;padding:2rem 1.2rem 2rem max(16px,2.2vw)}
.step .card{background:var(--card);border:1px solid var(--line-soft);border-radius:14px;padding:1.3rem 1.4rem .6rem;max-width:28rem;box-shadow:0 10px 40px rgba(0,0,0,.08)}
.step.intro{min-height:calc(var(--stage-h));align-items:center}
.step.intro .card{background:transparent;border:0;box-shadow:none;padding:1rem .2rem}
.step.intro h1{max-width:15ch}
.deck{font-size:1.1rem;line-height:1.55;color:var(--ink2)}
.hint{font:500 .85rem/1.3 var(--ui);color:var(--muted);margin-top:1.4rem}
.step.explore{min-height:calc(var(--vh) * 100);align-items:flex-start;padding-top:4rem}
.step.explore .card{max-width:30rem;width:100%}
.step p{font-size:1.04rem}

/* stage furniture */
.legend{position:absolute;left:14px;bottom:14px;display:flex;flex-direction:column;gap:.3rem;padding:.55rem .7rem;border-radius:10px;background:var(--card);border:1px solid var(--line-soft);font:500 .78rem/1.25 var(--ui);color:var(--ink2);max-width:min(18rem,60%);pointer-events:none}
.lg{display:flex;align-items:center;gap:.5rem}
.sw{display:inline-block;width:18px;height:3px;border-radius:2px;flex:none}
.sw.ok{background:var(--g-ok);box-shadow:0 0 0 1px var(--line-soft)} .sw.old{background:var(--g-old)} .sw.tru{background:var(--g-true)} .sw.dim{background:var(--g-odd)}
.sw.iso{background:var(--g-iso)} .sw.paint{background:var(--g-paint);height:4px} .sw.down{background:var(--g-down)} .sw.up{background:var(--g-up)}
.sw.west{background:#2f7fe0} .sw.east{background:#ef7a2a} .sw.wind{background:var(--g-wind);height:7px}
.yearbox{position:absolute;left:50%;transform:translateX(-50%);top:14px;width:min(32rem,calc(100% - 28px));padding:.6rem .8rem .5rem;border-radius:12px;background:var(--card);border:1px solid var(--line-soft);font:500 .85rem/1.2 var(--ui);color:var(--ink2)}
.ylab{display:block;font-weight:600;margin-bottom:.3rem}
.yrow{display:flex;align-items:center;gap:.6rem}
.yrow input{flex:1;accent-color:var(--acc);min-height:32px}
.yrow output{font:600 1.15rem/1 var(--ui);font-variant-numeric:tabular-nums;color:var(--ink);min-width:3ch}
.yread{margin:.3rem 0 0;font-variant-numeric:tabular-nums;color:var(--muted)}
.zoom{position:absolute;right:14px;bottom:14px;display:flex;gap:.4rem;align-items:center}
.zb{min-width:40px;height:40px;border-radius:999px;border:1px solid var(--line);background:var(--card);color:var(--ink);font:500 1.15rem/1 var(--ui);cursor:pointer;padding:0 .7rem}
.zb.reset{font-size:.85rem}
@media (pointer:coarse){.zb{min-width:44px;height:44px}}
.pop{position:absolute;z-index:5;width:240px;padding:.7rem .8rem .7rem;border-radius:12px;background:var(--card);border:1px solid var(--line);font:400 .85rem/1.35 var(--ui);color:var(--ink);display:flex;flex-direction:column;gap:.25rem;box-shadow:0 10px 30px rgba(0,0,0,.2)}
.pop strong{font-weight:600;padding-right:1.4rem}
.pop .pc{color:var(--muted);font-size:.8rem}
.pop .pr b{font-variant-numeric:tabular-nums}
.pop .pr.old b{color:var(--g-old)} .pop .pr.edge b{color:var(--g-paint)}
.pop .x{position:absolute;right:6px;top:4px;border:0;background:transparent;color:var(--ink);font-size:1.3rem;width:32px;height:32px;cursor:pointer}
.pop .btn{align-self:flex-start;margin-top:.3rem}

/* charts and tables inside the steps */
.fig{margin:.5rem 0 1rem}
.chart{width:100%;height:auto;display:block;font-family:var(--ui)}
.chart .grid{stroke:var(--line-soft)} .chart .ax{font-size:11px;fill:var(--muted)}
.chart .line{fill:none;stroke:var(--g-iso);stroke-width:2.2}
.chart .best{fill:var(--g-paint);stroke:var(--bg);stroke-width:1.5} .chart .now{fill:var(--ink)}
.chart .lab{font-size:12px;font-weight:600;fill:var(--ink)}
.chart .cursor{stroke:var(--ink);stroke-width:1;stroke-dasharray:3 3;opacity:.6}
.scrollx{overflow-x:auto;margin:0 0 1rem}
table.data{border-collapse:collapse;width:100%;font:400 .84rem/1.35 var(--ui)}
table.data caption{text-align:left;font-weight:600;padding:.2rem 0 .4rem;color:var(--ink2)}
table.data th,table.data td{padding:.35rem .45rem;border-bottom:1px solid var(--line-soft);text-align:left;vertical-align:top}
table.data thead th{font-weight:600;color:var(--muted);font-size:.78rem}
table.data .n{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
table.data .rwn{font-variant-numeric:tabular-nums;white-space:nowrap;font-weight:600}
.vd{white-space:nowrap;font-weight:600}
.vd.old{color:var(--g-old)} .vd.edge{color:var(--g-paint)} .vd.ok{color:var(--muted);font-weight:500}
html:not(.dark) .vd.edge{color:#8a5200}
@media (max-width:480px){table.rotab th:nth-child(3),table.rotab td:nth-child(3){display:none}table.data.rotab{font-size:.78rem}table.data.rotab th,table.data.rotab td{padding:.35rem .25rem}table.rotab .vd{white-space:normal}}

/* search and the airport card */
.search{display:grid;gap:.5rem;margin:1rem 0}
.slab{display:block;font:600 .85rem/1.3 var(--ui);color:var(--ink2)}
.combo{position:relative}
input[type=search]{width:100%;font:500 1rem/1.2 var(--ui);color:var(--ink);background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:.7rem .8rem;min-height:44px}
#sugg{position:absolute;z-index:25;left:0;right:0;top:100%;margin:.25rem 0 0;padding:.25rem;list-style:none;background:var(--surface);border:1px solid var(--line);border-radius:10px;max-height:18rem;overflow:auto;box-shadow:0 8px 24px rgba(0,0,0,.18)}
#sugg li{display:flex;flex-direction:column;padding:.45rem .6rem;border-radius:6px;cursor:pointer;font:400 .95rem/1.3 var(--ui)}
#sugg li span{font-size:.8rem;color:var(--muted)}
#sugg li[aria-selected=true],#sugg li:hover{background:var(--bg2)}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:.55rem 1rem;border-radius:999px;border:1px solid var(--ink);background:var(--ink);color:var(--bg);font:600 .92rem/1 var(--ui);cursor:pointer;text-decoration:none}
.btn.ghost{background:transparent;color:var(--ink);border-color:var(--line);justify-self:start}
.btn.small{min-height:36px;padding:.4rem .8rem;font-size:.85rem}
.btn.play{min-height:36px;padding:.35rem .8rem;font-size:.82rem;white-space:nowrap}
.acard h3{margin:.2rem 0 .1rem;font-size:1.3rem}
.acard .where{font:400 .85rem/1.4 var(--ui);color:var(--muted);margin:0 0 .6rem}
.arow{display:grid;grid-template-columns:minmax(0,11rem) minmax(0,1fr);gap:.8rem;align-items:start}
.diag{width:100%;height:auto;font-family:var(--ui)}
.diag .ring{fill:none;stroke:var(--line-soft)} .diag .petal{fill:var(--g-wind)}
.diag .asph{fill:#3a3f48;stroke:#6b7280;stroke-width:.6}
.diag .paint{font-size:11px;font-weight:600;fill:#fff}
.diag .paint.old{fill:#ffb38a}
.diag .tn{stroke:var(--ink);stroke-width:1.4} .diag .tnt{font-size:10px;fill:var(--ink)}
.diag .mn{stroke:var(--g-iso);stroke-width:1.6} .diag .mnt{font-size:10px;fill:var(--g-iso)}
.rwys{list-style:none;margin:0;padding:0;display:grid;gap:.7rem}
.rwy{display:grid;gap:.15rem;font:400 .88rem/1.4 var(--ui)}
.rwy .pn{font:600 1.25rem/1 var(--ui);letter-spacing:.02em;font-variant-numeric:tabular-nums}
.rwy .pn i{font-style:normal;color:var(--muted);margin:0 .15rem}
.rwy.old .pn{color:var(--g-old)} .rwy.edge .pn{color:#8a5200} html.dark .rwy.edge .pn{color:var(--g-paint)}
.rwy .meta{color:var(--muted);font-size:.8rem}
.rwy .sent{color:var(--ink2)}
@media (max-width:420px){.arow{grid-template-columns:1fr}.diag{max-width:12rem}}

/* share row */
.share-row{display:flex;align-items:center;gap:.45rem;flex-wrap:wrap;margin-top:1rem}
.share-row .lbl{font:500 .85rem/1 var(--ui);color:var(--muted);margin-right:.2rem}
.sh{display:grid;place-items:center;width:40px;height:40px;border-radius:50%;border:1px solid var(--line-soft);background:transparent;color:var(--ink);cursor:pointer}
.sh svg{width:18px;height:18px}
.sh:hover,.sh:focus-visible{color:var(--acc);border-color:var(--acc)}
@media (pointer:coarse){.sh{width:44px;height:44px}}
.status{font:400 .85rem/1.3 var(--ui);color:var(--muted);min-height:1.2em;margin:.3rem 0 0}

/* after the story */
.block{padding:3rem 0;position:relative;z-index:3;background:var(--bg)}
.tinted{background:var(--bg2)}
.plain{list-style:none;padding:0}
.sources li{font:400 .9rem/1.45 var(--ui);margin:.35rem 0}
footer{display:flex;flex-wrap:wrap;gap:.5rem 1.4rem;justify-content:center;padding:2rem 16px 3rem;font:400 .85rem/1.4 var(--ui);color:var(--muted);background:var(--bg);position:relative;z-index:3}
footer a{color:var(--ink2)}
.hpage main{padding:3rem 0}

/* phone: the globe keeps the top of the screen, the text passes below it */
@media (max-width:860px){
  .story{grid-template-columns:minmax(0,1fr);grid-template-areas:"main"}
  .stage{grid-area:main;align-self:start;height:calc(var(--vh) * 42);top:44px;z-index:4;box-shadow:0 1px 0 var(--line-soft)}
  .steps{grid-area:main;min-width:0;padding-top:calc(var(--vh) * 42);padding-bottom:12vh}
  .step{min-height:calc(var(--vh) * 62);padding:1rem 12px;align-items:flex-start}
  .step .card{max-width:none;width:100%;padding:1.05rem 1rem .4rem;box-shadow:none}
  .step.intro{min-height:auto;padding-top:.6rem}
  .step.intro .card{padding:.6rem .1rem}
  .step.intro h1{max-width:none}
  .hint{display:none}
  .legend{left:8px;bottom:8px;font-size:.7rem;padding:.4rem .5rem;gap:.2rem}
  .zoom{right:8px;bottom:8px}
  .yearbox{top:8px;padding:.45rem .6rem .4rem}
  .yearbox .ylab{display:none}
  .pop{width:210px}
}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}
@media print{.stage,.rail,.topbar,.zoom,.legend{display:none}.story{display:block}}