/* Self-hosted latin subsets of IBM Plex Sans, IBM Plex Mono and Newsreader (SIL Open Font
   License 1.1; licence texts in fonts/). Replaces the Google Fonts stylesheet. */
@font-face{font-family:"IBM Plex Mono";font-style:normal;font-weight:400;font-display:swap;src:url("fonts/ibm-plex-mono-400-latin.woff2") format("woff2")}
@font-face{font-family:"IBM Plex Mono";font-style:normal;font-weight:500;font-display:swap;src:url("fonts/ibm-plex-mono-500-latin.woff2") format("woff2")}
@font-face{font-family:"IBM Plex Sans";font-style:italic;font-weight:400;font-display:swap;src:url("fonts/ibm-plex-sans-italic-latin.woff2") format("woff2")}
@font-face{font-family:"IBM Plex Sans";font-style:normal;font-weight:400;font-display:swap;src:url("fonts/ibm-plex-sans-latin.woff2") format("woff2")}
@font-face{font-family:"IBM Plex Sans";font-style:normal;font-weight:500;font-display:swap;src:url("fonts/ibm-plex-sans-latin.woff2") format("woff2")}
@font-face{font-family:"IBM Plex Sans";font-style:normal;font-weight:600;font-display:swap;src:url("fonts/ibm-plex-sans-latin.woff2") format("woff2")}
@font-face{font-family:"Newsreader";font-style:italic;font-weight:400;font-display:swap;src:url("fonts/newsreader-italic-latin.woff2") format("woff2")}
@font-face{font-family:"Newsreader";font-style:normal;font-weight:400;font-display:swap;src:url("fonts/newsreader-latin.woff2") format("woff2")}
@font-face{font-family:"Newsreader";font-style:normal;font-weight:500;font-display:swap;src:url("fonts/newsreader-latin.woff2") format("woff2")}
/* Layout: one reading column (about 66 characters) on a night-sky ground; figures are "plates"
   that break out to 1120px. Single dark theme on purpose: these are pictures of the night sky,
   and their noise can only be judged against black. */
:root{
  --bg:#090c12; --panel:#0f141d; --raise:#171e2b; --rule:#242d3d;
  --ink:#ebe7dd; --ink-2:#b5bac6; --ink-3:#7d8698;
  --amber:#f2b25c;            /* the observer's dim torch: controls and "you are here" */
  --data:#3987e5;             /* measured values */
  --data-2:#d95926;           /* second series */
  --data-3:#199e70;           /* third series */
  --law:#9aa2b3;              /* the theoretical line */
  --font-display:"Newsreader","Iowan Old Style","Palatino Linotype",Georgia,serif;
  --font-body:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-data:"IBM Plex Mono",ui-monospace,"SF Mono",Menlo,Consolas,monospace;
  --col:42rem; --plate:70rem;
  color-scheme:dark;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font-body);font-size:17px;line-height:1.62;-webkit-font-smoothing:antialiased}
.wrap{padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px));padding-block:0 5rem}
.col{max-width:var(--col);margin-inline:auto}
.plate{max-width:var(--plate);margin:2.6rem auto;padding:0}
h1,h2,h3{font-family:var(--font-display);font-weight:400;text-wrap:balance;letter-spacing:-0.005em}
h1{font-size:clamp(2.3rem,6vw,4.1rem);line-height:1.04;margin:0 0 1.2rem}
h2{font-size:clamp(1.6rem,3.6vw,2.15rem);line-height:1.15;margin:4.2rem 0 1rem}
h3{font-size:1.3rem;line-height:1.25;margin:2.4rem 0 .6rem}
p{margin:0 0 1.05rem}
a{color:var(--amber);text-underline-offset:3px}
strong{font-weight:600;color:#fff}
em{font-style:italic}
.eyebrow{font-family:var(--font-data);font-size:.74rem;letter-spacing:.09em;text-transform:uppercase;color:var(--ink-3);margin:0 0 1.4rem}
.mast{padding-block:4.2rem 1rem}
.lede{font-family:var(--font-display);font-size:clamp(1.2rem,2.5vw,1.45rem);line-height:1.45;color:var(--ink)}
.num{font-family:var(--font-data);font-variant-numeric:tabular-nums;font-size:.92em}
.note{color:var(--ink-2);font-size:.93rem}
hr.sep{border:0;border-top:1px solid var(--rule);margin:3.4rem auto;max-width:var(--col)}

/* three headline figures: the numbers are the point of this page */
.facts{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;background:var(--rule);border-block:1px solid var(--rule);margin:2.2rem 0 0}
.fact{background:var(--bg);padding:1.3rem 1.1rem 1.2rem 0;min-width:0}
.fact + .fact{padding-left:1.3rem}
.fact b{display:block;font-family:var(--font-display);font-weight:400;font-size:clamp(2rem,4.6vw,2.9rem);line-height:1;color:#fff;margin-bottom:.55rem}
.fact span{display:block;color:var(--ink-2);font-size:.92rem;line-height:1.45}
@media (max-width:640px){.facts{grid-template-columns:1fr}.fact,.fact + .fact{padding:1.1rem 0}}

figure{margin:0}
figcaption{color:var(--ink-2);font-size:.9rem;line-height:1.5;margin-top:.9rem;max-width:var(--col)}
figcaption b{color:var(--ink);font-weight:600}
.figno{font-family:var(--font-data);font-size:.74rem;letter-spacing:.08em;text-transform:uppercase;color:var(--amber);margin-right:.6em}

/* ---- depth scrubber ---- */
.scrub{background:var(--panel);border:1px solid var(--rule);border-radius:6px;padding:clamp(12px,2.2vw,22px)}
.scrub-grid{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(0,1fr);gap:clamp(14px,2.4vw,28px);align-items:start}
.scrub-stage{position:relative;background:#000;border-radius:3px;overflow:hidden;aspect-ratio:1/1;max-width:100%}
.scrub-stage img{position:absolute;inset:0;width:100%;height:100%;display:block}
.scrub-badge{position:absolute;left:10px;bottom:10px;background:rgba(5,7,11,.78);color:#fff;font-family:var(--font-data);font-size:.82rem;padding:.3rem .55rem;border-radius:3px;font-variant-numeric:tabular-nums}
.scrub-side{display:flex;flex-direction:column;gap:1rem;min-width:0}
.locator-row{display:flex;gap:14px;align-items:flex-start}
.locator{position:relative;flex:0 0 auto;width:clamp(84px,12vw,128px);background:#000;border-radius:3px;overflow:hidden}
.locator img{display:block;width:100%;height:auto}
.locator button{position:absolute;border:1.5px solid rgba(255,255,255,.55);background:transparent;padding:0;cursor:pointer;border-radius:1px}
.locator button[aria-pressed="true"]{border-color:var(--amber);box-shadow:0 0 0 1px rgba(0,0,0,.6)}
.locator button:focus-visible,.tabs button:focus-visible,.play:focus-visible{outline:2px solid var(--amber);outline-offset:2px}
.tabs{display:flex;flex-direction:column;gap:6px;min-width:0;flex:1}
.tabs button{font:inherit;font-size:.86rem;text-align:left;color:var(--ink-2);background:transparent;border:1px solid var(--rule);border-radius:4px;padding:.42rem .6rem;cursor:pointer;line-height:1.25}
.tabs button[aria-pressed="true"]{color:#fff;border-color:var(--amber);background:var(--raise)}
.look{color:var(--ink-2);font-size:.9rem;line-height:1.5;margin:0}
.readout{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--rule);border:1px solid var(--rule);border-radius:4px;overflow:hidden;margin:0}
.readout div{background:var(--panel);padding:.6rem .7rem;min-width:0}
.readout dt{font-size:.72rem;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-3);margin:0 0 .2rem}
.readout dd{margin:0;font-family:var(--font-data);font-variant-numeric:tabular-nums;font-size:1.02rem;color:#fff;white-space:nowrap}
.readout dd small{color:var(--ink-3);font-size:.78rem}
.scrub-control{grid-column:1/-1;display:grid;grid-template-columns:auto minmax(0,1fr);gap:12px 14px;align-items:center}
.play{font:inherit;font-size:.84rem;color:var(--ink);background:var(--raise);border:1px solid var(--rule);border-radius:4px;padding:.45rem .8rem;cursor:pointer;min-width:4.6rem}
.play:hover{border-color:var(--amber)}
.slider-wrap{min-width:0}
input[type=range]{width:100%;margin:0;accent-color:var(--amber);height:28px;background:transparent}
.ticks{display:flex;justify-content:space-between;font-family:var(--font-data);font-size:.68rem;color:var(--ink-3);font-variant-numeric:tabular-nums;margin-top:2px;padding-inline:2px}
.ticks span{flex:0 0 0;width:0;min-width:0;white-space:nowrap;display:flex;justify-content:center}
.ticks span:first-child{justify-content:flex-start}
.ticks span:last-child{justify-content:flex-end}
.ticks span.on{color:var(--amber)}
.slider-wrap{overflow:hidden}
@media (max-width:760px){
  .scrub-grid{grid-template-columns:1fr}
  .ticks span:not(:first-child):not(:last-child):not(.on){visibility:hidden}
  .scrub-stage{order:1}.scrub-control{order:2}.scrub-side{order:3}
}

/* ---- strips of same-size crops ---- */
.strip{display:grid;gap:6px;grid-template-columns:repeat(var(--n,4),minmax(0,1fr))}
.strip .cell{position:relative;background:#000;overflow:hidden;aspect-ratio:1/1;border-radius:2px}
.strip .cell img{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);max-width:none;width:auto;height:auto}
.strip .cell.fit img{position:static;transform:none;width:100%;height:100%;display:block}
.strip .tag{position:absolute;left:6px;bottom:6px;background:rgba(5,7,11,.78);color:#fff;font-family:var(--font-data);font-size:.74rem;padding:.2rem .45rem;border-radius:2px}
.strip.tall .cell{aspect-ratio:auto}
.strip.tall .cell img{position:static;transform:none;width:100%;height:auto;display:block}
.rowlabel{font-family:var(--font-data);font-size:.74rem;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-3);margin:1.1rem 0 .4rem}
@media (max-width:700px){.strip{grid-template-columns:repeat(2,minmax(0,1fr))}.strip.tall{grid-template-columns:repeat(3,minmax(0,1fr))}}

/* ---- charts ---- */
.chart{background:var(--panel);border:1px solid var(--rule);border-radius:6px;padding:clamp(12px,2vw,20px) clamp(10px,2vw,20px) 10px;position:relative}
.chart h4{font-family:var(--font-body);font-weight:600;font-size:1rem;margin:0 0 .15rem;color:#fff}
.chart .sub{color:var(--ink-2);font-size:.86rem;margin:0 0 .6rem}
.chart svg{display:block;width:100%;height:auto;overflow:visible}
.chart svg text{font-family:var(--font-body);font-size:12px;fill:var(--ink-2)}
.chart svg text.tick{font-family:var(--font-data);font-size:11px;fill:var(--ink-3)}
.chart svg text.strong{fill:#fff;font-weight:500}
.legend{display:flex;flex-wrap:wrap;gap:.3rem 1.2rem;font-size:.84rem;color:var(--ink-2);margin:.2rem 0 .5rem}
.legend i{display:inline-block;width:18px;height:0;border-top:2px solid var(--c);vertical-align:middle;margin-right:.45em}
.legend i.dot{width:9px;height:9px;border:0;border-radius:50%;background:var(--c)}
.legend i.bar{width:12px;height:8px;border:0;border-radius:2px;background:var(--c)}
.tip{position:absolute;pointer-events:none;background:#05070b;border:1px solid var(--rule);border-radius:4px;padding:.5rem .65rem;font-size:.82rem;line-height:1.45;color:var(--ink-2);min-width:9rem;z-index:5;box-shadow:0 6px 18px rgba(0,0,0,.5)}
.tip b{display:block;color:#fff;font-family:var(--font-data);font-weight:500;margin-bottom:.15rem}
.tip span{display:flex;justify-content:space-between;gap:1rem}
.tip span em{font-style:normal;color:#fff;font-family:var(--font-data);font-variant-numeric:tabular-nums}
.pair{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.quad{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
@media (max-width:900px){.quad{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:760px){.pair{grid-template-columns:1fr}}
details.tbl{margin-top:.5rem;font-size:.84rem;color:var(--ink-2)}
details.tbl summary{cursor:pointer;color:var(--ink-3);font-size:.8rem;padding:.3rem 0}
.scroll{overflow-x:auto}
table{border-collapse:collapse;width:100%;font-size:.9rem}
th,td{text-align:left;padding:.45rem .7rem .45rem 0;border-bottom:1px solid var(--rule);vertical-align:top}
th{font-weight:500;color:var(--ink-3);font-size:.74rem;letter-spacing:.06em;text-transform:uppercase;white-space:nowrap}
td.n,th.n{text-align:right;font-family:var(--font-data);font-variant-numeric:tabular-nums;white-space:nowrap;padding-right:1rem}
td.n{color:#fff}

/* ---- bar rows (nights, progress) ---- */
.bars{display:grid;gap:.55rem}
.bar-row{display:grid;grid-template-columns:minmax(7.5rem,11rem) minmax(0,1fr) 4.2rem;gap:.8rem;align-items:center;font-size:.88rem}
.bar-row .lab{color:var(--ink);line-height:1.25}
.bar-row .lab small{display:block;color:var(--ink-3);font-size:.76rem}
.bar-row .track{position:relative;height:14px}
.bar-row .track::before{content:"";position:absolute;left:0;top:0;bottom:0;width:1px;background:var(--ink-3)}
.bar-row .fill{position:absolute;left:1px;top:0;bottom:0;background:var(--c,var(--data));border-radius:0 4px 4px 0;min-width:2px}
.bar-row .val{font-family:var(--font-data);font-variant-numeric:tabular-nums;color:#fff;text-align:right}
.bar-row.two .track{height:22px}
.bar-row.two .fill{height:9px;bottom:auto}
.bar-row.two .fill.b{top:auto;bottom:0}
@media (max-width:560px){.bar-row{grid-template-columns:minmax(0,1fr) 3.8rem}.bar-row .lab{grid-column:1/-1}}

.callout{border-left:2px solid var(--amber);padding:.1rem 0 .1rem 1.1rem;margin:1.6rem 0;color:var(--ink)}
.callout p:last-child{margin-bottom:0}
ol.steps{padding-left:1.2rem;margin:0 0 1rem}
ol.steps li{margin-bottom:.6rem}
ul.plain{padding-left:1.1rem;margin:0 0 1rem}
ul.plain li{margin-bottom:.5rem}
details.method{border-top:1px solid var(--rule);padding-top:1rem;margin-top:1rem}
details.method summary{cursor:pointer;font-family:var(--font-display);font-size:1.3rem}
details.method[open] summary{margin-bottom:1rem}
footer{color:var(--ink-3);font-size:.82rem;margin-top:4rem;border-top:1px solid var(--rule);padding-top:1.2rem}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}

/* Former inline style="" attributes, moved here because the CSP (style-src 'self') blocks them.
   !important reproduces the precedence an inline style attribute had. */
.c-data{--c:var(--data)!important}
.c-data-3{--c:var(--data-3)!important}
.c-law{--c:var(--law)!important}
.dashed{border-top-style:dashed!important}
.mt-1-4{margin-top:1.4rem!important}
.w-56{max-width:56rem!important}

/* FIX 2026-11-12 (bug in the source page, not introduced by the split): ".scrub-stage img" sets
   display:block, which overrides the browser's own [hidden]{display:none}. Every plate in a stage
   was therefore drawn, stacked, and the last one covered the rest, so the depth slider and Play
   changed the label but never the picture. */
.scrub-stage img[hidden]{display:none}