/* GEM MINE — the chrome that sits over the WebGL workings.

   The register, and why it is not the colliery's:
   a coal drift was warm amber on brown. Three kilometres down in hard rock is
   the opposite — near-black with a cold blue cast, because the light is
   mercury vapour and the air is refrigerated. Gold appears twice and only
   twice: dull brass in shadow (--gold) and near-white where the lamp lands
   (--gold-hi). There is no yellow gradient anywhere in this file, because a
   yellow gradient is what costume gold looks like.

   Diamond fire is drawn as SEPARATED spectral flecks, never a rainbow sweep —
   a real stone disperses one colour at a time and the sweep is the tell.

   Two type voices doing two jobs: you go DOWN in Archivo at its condensed
   width (signage, stencilled, industrial) and you come UP into Bodoni Moda
   (a didone: engraved certificate, banknote, a document that asserts value).
   That switch is the whole design idea. Both are variable and audited — the
   axes below actually move.

   Dark only, on purpose: a light mode for the inside of a mine is a joke. It
   is still painted explicitly rather than left transparent. */

@font-face{font-family:'Archivo VF';src:url('../fonts/archivo-wdth.woff2') format('woff2-variations');font-weight:100 900;font-stretch:62% 125%;font-display:swap}
@font-face{font-family:'Bodoni Moda';src:url('../fonts/bodoni-moda-vf.woff2') format('woff2-variations');font-weight:400 900;font-display:swap}
@font-face{font-family:'Plex Mono';src:url('../fonts/plex-mono-400.woff2') format('woff2');font-weight:400;font-display:swap}
@font-face{font-family:'Plex Mono';src:url('../fonts/plex-mono-500.woff2') format('woff2');font-weight:500;font-display:swap}
@font-face{font-family:'Plex Mono';src:url('../fonts/plex-mono-700.woff2') format('woff2');font-weight:700;font-display:swap}
@font-face{font-family:'Plex Sans';src:url('../fonts/plex-sans-400.woff2') format('woff2');font-weight:400;font-display:swap}
@font-face{font-family:'Plex Sans';src:url('../fonts/plex-sans-600.woff2') format('woff2');font-weight:600;font-display:swap}

:root{
  --ground:#05070a;  --deep:#0a0e14;  --panel:#0d131b;  --raise:#141c26;
  --rock:#161d26;    --line:#243040;
  --gold:#c9962e;    --gold-hi:#ffe9a8;  --gold-dp:#7d5a14;
  --quartz:#c3d0de;  --steel:#8fa3b8;    --steel-d:#42505f;
  --bone:#e8edf2;    --dim:#768697;   /* 4.60:1 on --raise, 5.40:1 on --ground — AA at every ground */
  --warn:#ff5236;    --ok:#43e0a0;       --uv:#8b5cf6;

  /* monotonic, and it stays monotonic — css_traps fails a scale that dips */
  --s1:4px; --s2:8px; --s3:12px; --s4:16px; --s5:24px; --s6:32px; --s7:48px; --s8:72px; --s9:112px;

  --mono:'Plex Mono',ui-monospace,SFMono-Regular,Menlo,monospace;
  --body:'Plex Sans',ui-sans-serif,system-ui,-apple-system,'Segoe UI',sans-serif;
  --sign:'Archivo VF','Archivo',Impact,sans-serif;
  --cert:'Bodoni Moda',Didot,'Bodoni MT','Times New Roman',serif;

  --rad:2px;
  --shadow:0 24px 64px -18px rgba(0,0,0,.92);
  color-scheme:dark;
}

*,*::before,*::after{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0; background:var(--ground); color:var(--bone);
  font-family:var(--body); font-size:16px; line-height:1.55;
  -webkit-font-smoothing:antialiased; overscroll-behavior:none;
}
/* Deliberately NO overflow-x clip or hidden on the page. Either one hides real
   overflow from a scrollWidth probe and reports a false clean — this studio has
   shipped a clipped band that way. Anything wide (the grade ladder) scrolls
   inside its own box instead, so a page-level overflow is a real bug and shows
   up as one. */
img{max-width:100%;height:auto}
.hidden{display:none !important}
.mono{font-family:var(--mono);letter-spacing:0.06em}
.sign{
  font-family:var(--sign); font-weight:900; font-variation-settings:'wght' 900,'wdth' 74;
  letter-spacing:0.01em; text-transform:uppercase; margin:0;
}
:focus-visible{outline:2px solid var(--gold-hi);outline-offset:3px}
::selection{background:rgba(201,150,46,.35);color:var(--bone)}

/* ── the workings ─────────────────────────────────────────────────────── */
#gl{position:fixed;inset:0;width:100%;height:100%;display:block;z-index:0;background:var(--ground)}
#veil{position:fixed;inset:0;background:#000;opacity:0;pointer-events:none;transition:opacity .6s ease;z-index:40}
#veil.on{opacity:1}
#dial{
  position:fixed;left:50%;top:44%;transform:translate(-50%,-50%);z-index:30;
  font-family:var(--mono);text-align:center;color:var(--steel);opacity:0;
  transition:opacity .5s ease;pointer-events:none;
}
#dial.on{opacity:1}
#dial span{display:block;font-size:11px;letter-spacing:0.28em;color:var(--dim)}
#dial b{display:block;font-size:clamp(38px,11vw,84px);line-height:1;color:var(--gold-hi);font-weight:700;font-variant-numeric:tabular-nums}

/* ── HUD ──────────────────────────────────────────────────────────────── */
#hud{position:fixed;inset:0;z-index:20;pointer-events:none;opacity:0;transition:opacity .4s ease}
#hud.on{opacity:1}
.hud-tl{position:absolute;top:max(var(--s4),env(safe-area-inset-top));left:var(--s4)}
.hud-tr{position:absolute;top:max(var(--s4),env(safe-area-inset-top));right:var(--s4);text-align:right;display:grid;gap:var(--s1);justify-items:end}
.tag{font-family:var(--mono);font-weight:700;font-size:15px;color:var(--gold-hi);letter-spacing:0.08em}
.tag-sub{font-family:var(--mono);font-size:10.5px;color:var(--dim);letter-spacing:0.28em}
.ro{font-family:var(--mono);font-size:10px;color:var(--dim);letter-spacing:0.20em;display:flex;gap:var(--s2);align-items:baseline}
.ro b{color:var(--steel);font-size:13px;font-variant-numeric:tabular-nums;letter-spacing:0.04em}
#hud-mute{
  pointer-events:auto;margin-top:var(--s2);background:transparent;border:1px solid var(--steel-d);
  color:var(--dim);font-family:var(--mono);font-size:10.5px;letter-spacing:0.20em;padding:5px 9px;
  border-radius:var(--rad);cursor:pointer;transition:color .2s,border-color .2s;
}
#hud-mute:hover{color:var(--steel);border-color:var(--steel)}

.hud-bc{position:absolute;left:50%;bottom:max(var(--s4),env(safe-area-inset-bottom));transform:translateX(-50%);text-align:center}
.rough{display:flex;gap:var(--s2);justify-content:center}
/* one facet per face. Empty is an outline; recovered is a filled stone that
   throws a fleck of fire. Nothing pulses — a HUD that breathes is a tell. */
.rough i{
  width:15px;height:15px;display:block;background:transparent;
  border:1px solid var(--steel-d);transform:rotate(45deg);position:relative;
  transition:background .35s ease,border-color .35s ease,box-shadow .35s ease;
}
.rough i.got{background:linear-gradient(135deg,var(--gold) 0%,var(--gold-dp) 100%);border-color:var(--gold-hi);box-shadow:0 0 12px -2px rgba(255,233,168,.55)}
.rough i.now{border-color:var(--gold-hi)}
.rough i.got::after{content:'';position:absolute;inset:3px 3px auto auto;width:3px;height:3px;background:var(--gold-hi)}
.rough-cap{font-family:var(--mono);font-size:10.5px;letter-spacing:0.28em;color:var(--dim);margin-top:var(--s2)}
.hud-line{
  position:absolute;left:50%;top:16%;transform:translateX(-50%);max-width:min(600px,88vw);
  text-align:center;font-family:var(--mono);font-size:13px;letter-spacing:0.05em;color:var(--gold-hi);
  text-shadow:0 2px 20px rgba(0,0,0,.9);min-height:1.4em;
}

/* ── panels ───────────────────────────────────────────────────────────── */
.panel{
  position:fixed;inset:0;z-index:35;display:none;
  place-content:center;justify-items:center;
  padding:max(var(--s4),env(safe-area-inset-top)) var(--s4) max(var(--s4),env(safe-area-inset-bottom));
  background:radial-gradient(120% 90% at 50% 0%,rgba(10,14,20,.80) 0%,rgba(5,7,10,.955) 66%);
  backdrop-filter:blur(3px);
}
.panel.on{display:grid}
.panel > *{width:min(680px,94vw)}
.panel-head{text-align:center;margin-bottom:var(--s4)}
.panel-head .mono{display:block;font-size:10px;letter-spacing:0.28em;color:var(--dim);margin-bottom:var(--s2)}
.panel-head h2{font-size:clamp(30px,7vw,54px);line-height:.94;color:var(--bone)}
.panel-body{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--rad);
  padding:var(--s5);box-shadow:var(--shadow);
}
.panel-foot{margin-top:var(--s3)}
.pbar{height:3px;background:rgba(255,255,255,.06);overflow:hidden}
.pbar i{display:block;height:100%;width:100%;background:var(--gold);transform:scaleX(0);transform-origin:left center;transition:transform .3s ease;will-change:transform}
.tip{font-size:10px;letter-spacing:0.16em;color:var(--dim);margin-top:var(--s2);min-height:1.3em;text-align:center}

/* Ratio pinned, then capped. A vh height would make the demo a different SHAPE
   on every visitor's screen, and these demos are laid out to a shape. */
.demo{aspect-ratio:16/7;max-height:210px;width:100%;border:1px solid var(--line);background:var(--ground);margin-bottom:var(--s3)}
.stage{aspect-ratio:4/3;max-height:min(56dvh,440px);width:100%;border:1px solid var(--line);background:var(--ground);position:relative;touch-action:none}
.game-canvas{display:block;width:100%;height:100%}
.hint{font-size:10px;letter-spacing:0.20em;color:var(--gold);text-align:center;margin-bottom:var(--s3)}
.brief{font-size:14px;line-height:1.6;color:var(--steel);margin:0 0 var(--s4)}
.result-k{font-size:11px;letter-spacing:0.26em;color:var(--dim);margin:0 0 var(--s3);text-align:center}
.result{font-size:16px;line-height:1.6;color:var(--bone);margin:0 0 var(--s5);text-align:center}
/* short landscape phones: keep the game itself the thing that survives */
@media (max-height:520px) and (orientation:landscape){
  .demo{aspect-ratio:auto;height:96px} .stage{aspect-ratio:auto;height:58dvh;max-height:none} .brief{font-size:13px;margin-bottom:var(--s3)}
  .panel-head h2{font-size:26px} .panel-body{padding:var(--s3)}
}

/* ── controls ─────────────────────────────────────────────────────────── */
.btn{
  display:block;width:100%;padding:var(--s3) var(--s5);border:1px solid var(--gold);
  background:rgba(201,150,46,.10);color:var(--gold-hi);
  font-family:var(--mono);font-size:12px;font-weight:700;letter-spacing:0.20em;text-transform:uppercase;
  text-align:center;text-decoration:none;border-radius:var(--rad);cursor:pointer;
  transition:background .18s ease,color .18s ease,border-color .18s ease;
}
.btn:hover:not(:disabled){background:rgba(201,150,46,.22);color:#fff}
.btn:disabled{opacity:.34;cursor:not-allowed}
.btn.ghost{border-color:var(--steel-d);background:transparent;color:var(--steel)}
.btn.ghost:hover{border-color:var(--steel);color:var(--bone);background:rgba(143,163,184,.08)}
.btn.danger{border-color:var(--warn);background:rgba(255,82,54,.10);color:var(--warn)}
.btn.danger:hover{background:rgba(255,82,54,.20);color:#fff}
.btn.enter{margin:var(--s5) 0 var(--s3);padding:var(--s4);font-size:13px}
.lbl{display:block;font-size:10.5px;letter-spacing:0.28em;color:var(--dim);margin:var(--s4) 0 var(--s2)}
.input{
  width:100%;padding:var(--s3);background:var(--ground);border:1px solid var(--line);
  color:var(--bone);font-family:var(--mono);font-size:14px;border-radius:var(--rad);
}
.input:focus{outline:none;border-color:var(--gold)}
.input::placeholder{color:var(--dim)}
.err{color:var(--warn);font-size:11px;letter-spacing:0.06em;min-height:1.3em;margin-top:var(--s2)}
.fine{font-size:10.5px;letter-spacing:0.14em;color:var(--dim);line-height:1.7;margin:var(--s4) 0 0}

/* ── THE CERTIFICATE ──────────────────────────────────────────────────────
   The one surface in the build that is not industrial. You have come up out of
   the rock and a document is being handed to you, so the type changes voice:
   Bodoni Moda at a high optical size, where its hairlines go thin and the
   thing starts to read like an engraving rather than a UI.

   The `src` line under each C is load-bearing and not decoration. It says
   which of your own decisions produced that grade. Without it the four C's are
   four numbers a computer made up; with it they are a scorecard. */
.cert{border:1px solid var(--line);background:linear-gradient(180deg,var(--raise) 0%,var(--panel) 100%);padding:var(--s5) var(--s4);margin-bottom:var(--s4)}
.cert-rule{height:1px;background:linear-gradient(90deg,transparent,var(--gold-dp) 12%,var(--gold) 50%,var(--gold-dp) 88%,transparent)}
.cert-head{display:flex;justify-content:space-between;gap:var(--s3);font-size:10.5px;letter-spacing:0.28em;color:var(--dim);padding:var(--s3) 0 var(--s4)}
.cert-stone{display:grid;place-items:center;margin-bottom:var(--s3)}
#cert-canvas{width:128px;height:128px;display:block}
.cert-grade{
  font-family:var(--cert);font-variation-settings:'opsz' 34,'wght' 550;
  font-size:clamp(26px,6vw,42px);line-height:1.06;text-align:center;color:var(--bone);
  letter-spacing:0.01em;margin-bottom:var(--s5);font-variant-numeric:lining-nums tabular-nums;
}
.cert-4c{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--s4) var(--s2);margin:0 0 var(--s5);padding:var(--s4) 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
@media (min-width:520px){ .cert-4c{grid-template-columns:repeat(4,1fr);gap:var(--s2)} }
.cert-4c > div{text-align:center;min-width:0}
.cert-4c dt{font-family:var(--mono);font-size:10px;letter-spacing:0.24em;color:var(--dim);margin-bottom:var(--s2)}
.cert-4c dd{margin:0;font-variant-numeric:lining-nums tabular-nums;font-family:var(--cert);font-variation-settings:'opsz' 17,'wght' 650;font-size:clamp(14px,3.6vw,21px);color:var(--gold-hi);line-height:1.15;overflow-wrap:normal;word-break:keep-all;hyphens:none}
.cert-4c dd:not(.src):empty::before{content:'PENDING'}
.cert-4c dd.src{font-family:var(--mono);font-variation-settings:normal;font-size:10px;letter-spacing:0.08em;color:var(--dim);margin-top:var(--s2);text-transform:uppercase}
.cert-settle{display:flex;align-items:baseline;justify-content:center;gap:var(--s2);flex-wrap:wrap}
.cert-settle .mono{font-size:10.5px;letter-spacing:0.28em;color:var(--dim)}
.cert-settle b{
  font-family:var(--cert);font-variation-settings:'opsz' 46,'wght' 700;
  font-size:clamp(30px,9vw,58px);line-height:1;color:var(--gold-hi);
  font-variant-numeric:lining-nums tabular-nums;
}
.cert-note{font-size:10.5px;letter-spacing:0.14em;color:var(--dim);text-align:center;line-height:1.7;padding:var(--s3) 0}
.cert.fire{border-color:var(--gold)}
.cert.fire .cert-grade{color:var(--gold-hi)}

/* ── the settlement slip ──────────────────────────────────────────────── */
.scrip{border:1px solid var(--gold-dp);background:var(--raise);padding:var(--s5) var(--s4);margin-bottom:var(--s4)}
.scrip-head{font-size:10.5px;letter-spacing:0.24em;color:var(--dim);text-align:center;margin-bottom:var(--s4)}
.scrip-amt{font-family:var(--cert);font-variation-settings:'opsz' 36,'wght' 700;font-size:clamp(26px,7vw,44px);text-align:center;color:var(--gold-hi);margin-bottom:var(--s5);font-variant-numeric:lining-nums tabular-nums}
.scrip-row{display:flex;justify-content:space-between;gap:var(--s3);font-size:10px;letter-spacing:0.12em;color:var(--dim);padding:var(--s2) 0;border-top:1px solid var(--line)}
.scrip-row b{color:var(--steel);font-weight:500;text-align:right;overflow-wrap:anywhere;min-width:0}
.scrip-note{font-size:10px;color:var(--steel);line-height:1.65;padding:var(--s3) 0;letter-spacing:0.05em}
.scrip-tx{display:block;font-size:10px;letter-spacing:0.18em;color:var(--gold);text-decoration:none;padding:var(--s2) 0}
.scrip-tx:hover{color:var(--gold-hi);text-decoration:underline}
.scrip-line{font-size:10.5px;letter-spacing:0.24em;color:var(--dim);text-align:center;padding-top:var(--s3);border-top:1px solid var(--line)}

/* ── the bank (surface) ───────────────────────────────────────────────── */
#surface{position:relative;z-index:10;min-height:100dvh;display:grid;grid-template-rows:1fr auto}
#surface.gone{display:none}
.sky{position:fixed;inset:0;z-index:-1;background:
  radial-gradient(90% 62% at 50% 4%,rgba(60,90,130,.20) 0%,transparent 60%),
  linear-gradient(180deg,#080d15 0%,#05070a 58%,#04060a 100%);}
#stars{position:fixed;inset:0;z-index:-1;width:100%;height:100%;display:block;opacity:.7}
.headframe{
  width:min(720px,100%);margin:0 auto;
  padding:max(var(--s8),env(safe-area-inset-top)) var(--s5) var(--s7);
}
.board{text-align:center;margin-bottom:var(--s7)}
.board-top{font-size:10.5px;letter-spacing:0.24em;color:var(--dim);margin-bottom:var(--s5);line-height:2}
.ticker{
  font-size:clamp(52px,15vw,132px);line-height:.86;color:var(--bone);
  font-variation-settings:'wght' 900,'wdth' 66;
  text-shadow:0 0 70px rgba(201,150,46,.16);
}
.strap{font-family:var(--mono);font-size:11px;letter-spacing:0.18em;color:var(--gold);margin:var(--s4) 0 0;text-transform:uppercase}
.strap2{font-family:var(--mono);font-size:10.5px;letter-spacing:0.28em;color:var(--dim);margin:var(--s2) 0 0}

/* Exactly TWO grid children per row — the number and one wrapper. Inline <b>
   and <span> inside a grid container become grid ITEMS, which is what put one
   word per line here the first time. */
.rules{display:grid;gap:var(--s4);margin-bottom:var(--s6);font-size:12px;line-height:1.75;color:var(--steel);letter-spacing:0.02em}
.rules > div{display:grid;grid-template-columns:26px 1fr;gap:var(--s3);align-items:start}
.rules p{margin:0}
.rules .n{color:var(--gold);font-weight:700}
.rules p b{color:var(--bone);font-weight:600}

.notice{border:1px solid var(--line);background:var(--panel);padding:var(--s4);margin-bottom:var(--s6)}
.notice-k{font-size:10.5px;letter-spacing:0.28em;color:var(--dim);margin-bottom:var(--s2)}
.notice-t{font-family:var(--mono);font-size:12px;color:var(--steel);line-height:1.6;min-height:1.6em}

.ledger{border:1px solid var(--line);background:var(--panel);padding:var(--s5) var(--s4);margin-bottom:var(--s5)}
.ledger-h{font-size:11px;letter-spacing:0.26em;color:var(--gold);margin:0 0 var(--s3)}
.ledger-p{font-size:13px;color:var(--steel);line-height:1.6;margin:0 0 var(--s4)}
.ledger-row{margin-bottom:var(--s3)}
.bk-input{display:grid;grid-template-columns:1fr auto;gap:var(--s2)}
.bk-input .btn{width:auto;padding:var(--s3) var(--s5)}
@media (max-width:520px){.bk-input{grid-template-columns:1fr}.bk-input .btn{width:100%}}
.signed-row{display:none;font-size:10px;letter-spacing:0.14em;color:var(--ok);margin-top:var(--s3);overflow-wrap:anywhere}
.ledger.signed .signed-row{display:block}
.ledger.signed .bk-input,.ledger.signed .lbl,.ledger.signed #btn-compose{opacity:.35;pointer-events:none}
.signed-row a{color:var(--ok)}

.lamproom{border:1px solid var(--line);background:var(--panel);padding:var(--s4);margin-bottom:var(--s3)}
.lr-k{font-size:10.5px;letter-spacing:0.28em;color:var(--dim);margin-bottom:var(--s2)}
.lr-status{font-size:11px;color:var(--steel);margin-bottom:var(--s2);letter-spacing:0.12em}
.lr-bar{height:3px;background:rgba(255,255,255,.06);overflow:hidden}
.lr-bar i{display:block;height:100%;width:100%;background:var(--gold);transform:scaleX(0);transform-origin:left center;transition:transform .4s ease;will-change:transform}
.lr-check{font-size:10px;letter-spacing:0.20em;color:var(--dim);margin-top:var(--s2)}

/* ── the grade ladder ─────────────────────────────────────────────────── */
.grades{margin-top:var(--s8);border-top:1px solid var(--line);padding-top:var(--s6)}
.grades-h{font-size:11px;letter-spacing:0.26em;color:var(--gold);margin:0 0 var(--s3)}
.grades-p{font-size:13px;color:var(--steel);line-height:1.65;margin:0 0 var(--s5);max-width:56ch}
/* The grade line is long and must never break mid-grade, so it takes the full
   width and the two small figures sit under it. Above 560px they pull up onto
   one line. No horizontal scroll is needed at any width. */
.ladder{display:grid;gap:1px;background:var(--line);border:1px solid var(--line)}
.rung{display:grid;gap:var(--s2) var(--s3);background:var(--panel);padding:var(--s3) var(--s4);
      grid-template-columns:1fr auto;grid-template-areas:'g g' 'w p';align-items:baseline}
.rung-g{grid-area:g;font-family:var(--cert);font-variation-settings:'opsz' 17,'wght' 650;
        font-size:clamp(15px,4.2vw,19px);line-height:1.2;color:var(--bone);
        font-variant-numeric:lining-nums tabular-nums;text-wrap:balance}
.rung-w{grid-area:w;font-family:var(--mono);font-size:10px;letter-spacing:0.12em;color:var(--dim)}
.rung-p{grid-area:p;font-family:var(--mono);font-size:13px;font-weight:700;color:var(--gold);
        font-variant-numeric:tabular-nums;text-align:right;letter-spacing:0.04em}
@media (min-width:560px){
  .rung{grid-template-columns:minmax(0,1fr) auto auto;grid-template-areas:'g w p';gap:var(--s4)}
  .rung-w{text-align:right}
}
.rung.top{background:var(--raise)}
.rung.top .rung-g,.rung.top .rung-p{color:var(--gold-hi)}

.surface-foot{
  display:flex;justify-content:space-between;gap:var(--s3);flex-wrap:wrap;
  padding:var(--s5) var(--s5) max(var(--s5),env(safe-area-inset-bottom));
  font-size:10.5px;letter-spacing:0.20em;color:var(--dim);border-top:1px solid var(--line);
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
}