/* ============================================================
   SPECTRUM ATLAS — observatory console
   Dark-first instrument room. The accent IS the current band,
   so the whole interface changes colour as you travel.
   ============================================================ */

:root{
  /* dark is the design; light is the daylight-lab variant below */
  --bg:#05070C;
  --bg-2:#080B12;
  --panel:rgba(13,17,26,.93);
  --panel-solid:#0D111A;
  --panel-2:rgba(19,24,36,.85);
  --line:rgba(122,142,182,.17);
  --line-2:rgba(122,142,182,.34);
  --ink:#E9EDF7;
  --ink-2:#9BA5BC;
  --ink-3:#6C7592;
  --ink-4:#4B5370;

  --b-radio:#E0648B;
  --b-micro:#F07566;
  --b-thz:#F19A4C;
  --b-ir:#E3B549;
  --b-vis:#4ACB8B;
  --b-uv:#9E7FF5;
  --b-xray:#5F90F5;
  --b-gamma:#3FC9E4;

  --good:#4FC98D;
  --warn:#E3AE52;
  --crit:#EE7A6E;

  --acc:var(--b-vis);
  --acc-live:var(--b-radio);
  --acc-scrub:var(--b-vis);
  --acc-calc:var(--b-vis);

  --grid:rgba(122,142,182,.055);
  --glow:0 0 22px -6px currentColor;
  --shadow:0 2px 6px rgba(0,0,0,.42), 0 22px 54px -26px rgba(0,0,0,.9);

  --rail-h:96px;
  --maxw:1300px;
  --readw:68ch;

  --f-display:"Archivo","Helvetica Neue",Arial,sans-serif;
  --f-body:"Spectral",Georgia,"Times New Roman",serif;
  --f-mono:"IBM Plex Mono",ui-monospace,"SF Mono",Menlo,Consolas,monospace;
}

:root[data-theme="light"]{
  --bg:#EFF1F6;
  --bg-2:#E6E9F1;
  --panel:rgba(255,255,255,.95);
  --panel-solid:#FBFBFD;
  --panel-2:rgba(255,255,255,.94);
  --line:rgba(30,44,80,.14);
  --line-2:rgba(30,44,80,.26);
  --ink:#12151E;
  --ink-2:#464C60;
  --ink-3:#6E7590;
  --ink-4:#9298AE;

  --b-radio:#A5344F;
  --b-micro:#BF4436;
  --b-thz:#B96322;
  --b-ir:#9E7A16;
  --b-vis:#1F8B57;
  --b-uv:#6238C2;
  --b-xray:#2554C4;
  --b-gamma:#0C7F9B;

  --good:#1C7A52;
  --warn:#8D5C10;
  --crit:#A93A2E;

  --grid:rgba(30,44,80,.05);
  --shadow:0 1px 2px rgba(18,20,30,.06), 0 14px 40px -20px rgba(18,20,30,.26);
}

*,*::before,*::after{box-sizing:border-box}

html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){ html{scroll-behavior:auto} }

body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--f-body);
  font-size:16.5px;
  line-height:1.62;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
  position:relative;
}

/* ambient ground: engraved grid + a band-tinted wash that shifts on scroll */
body::before{
  content:"";position:fixed;inset:-10%;z-index:-3;pointer-events:none;
  background:
    linear-gradient(var(--grid) 1px,transparent 1px) 0 0/100% 34px,
    linear-gradient(90deg,var(--grid) 1px,transparent 1px) 0 0/34px 100%;
  opacity:.85;
}
body::after{
  content:"";position:fixed;inset:0;z-index:-2;pointer-events:none;
  background:
    radial-gradient(90% 55% at 50% 0%, color-mix(in srgb,var(--acc-live) 15%,transparent), transparent 70%),
    radial-gradient(70% 50% at 8% 100%, color-mix(in srgb,var(--acc-live) 9%,transparent), transparent 72%),
    linear-gradient(180deg,transparent 30%,var(--bg-2));
}

#field{position:fixed;inset:0;z-index:-1;width:100%;height:100%;pointer-events:none;opacity:.72}

img{max-width:100%}
[hidden]{display:none !important}
:focus-visible{outline:2px solid var(--acc-live);outline-offset:3px;border-radius:3px}
::selection{background:color-mix(in srgb,var(--acc-live) 32%,transparent)}

h1,h2,h3,h4{font-family:var(--f-display);font-weight:600;letter-spacing:-.02em;text-wrap:balance;margin:0;line-height:1.14}
p{margin:0}
a{color:inherit}

/* wikipedia auto-links */
a.wiki{
  color:inherit;text-decoration:none;
  border-bottom:1px dotted color-mix(in srgb,var(--acc-live) 62%,var(--line-2));
  transition:color .18s,border-color .18s,background .18s;
  padding-bottom:1px;
}
a.wiki:hover{color:var(--acc-live);border-bottom-style:solid;background:color-mix(in srgb,var(--acc-live) 10%,transparent)}
a.wiki::after{content:"↗";font-size:.68em;vertical-align:super;opacity:.45;margin-left:1px;font-family:var(--f-mono)}

.wrap{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:clamp(16px,4vw,44px)}
.narrow{max-width:960px}
.eyebrow{font-family:var(--f-mono);font-size:10px;font-weight:500;letter-spacing:.2em;text-transform:uppercase;color:var(--ink-3)}
.mono{font-family:var(--f-mono);font-variant-numeric:tabular-nums}

/* ---------- instrument panel ---------- */
.panel{
  position:relative;background:var(--panel);border:1px solid var(--line);border-radius:4px;
  box-shadow:var(--shadow);
}
.panel::before,.panel::after{
  content:"";position:absolute;width:9px;height:9px;border:1px solid var(--line-2);pointer-events:none;
}
.panel::before{top:-1px;left:-1px;border-right:0;border-bottom:0}
.panel::after{bottom:-1px;right:-1px;border-left:0;border-top:0}
.panel-hd{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:9px 13px;border-bottom:1px solid var(--line);
  font-family:var(--f-mono);font-size:9.5px;letter-spacing:.17em;text-transform:uppercase;color:var(--ink-3);
}
.panel-hd .led{width:6px;height:6px;border-radius:50%;background:var(--acc-live);box-shadow:0 0 9px var(--acc-live);flex:none}
.panel-bd{padding:15px 16px}

/* ---------- masthead ---------- */
.masthead{padding-block:clamp(22px,4.5vh,46px) 16px}
.mast-top{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.boot{font-family:var(--f-mono);font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:var(--ink-3);display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.boot .dot{width:5px;height:5px;border-radius:50%;background:var(--good);box-shadow:0 0 8px var(--good)}
.mast-title{
  font-size:clamp(40px,8vw,88px);font-weight:700;letter-spacing:-.042em;margin-top:12px;line-height:.98;
  background:linear-gradient(96deg,var(--b-radio),var(--b-micro) 15%,var(--b-thz) 26%,var(--b-ir) 36%,var(--b-vis) 49%,var(--b-uv) 65%,var(--b-xray) 80%,var(--b-gamma));
  -webkit-background-clip:text;background-clip:text;color:transparent;width:fit-content;
}
.deck{max-width:62ch;margin-top:16px;color:var(--ink-2);font-size:clamp(15.5px,1.6vw,19px)}
.deck strong{color:var(--ink);font-weight:600}
.mast-stats{display:flex;flex-wrap:wrap;gap:1px;margin-top:26px;background:var(--line);border:1px solid var(--line);border-radius:4px;overflow:hidden}
.stat{flex:1 1 150px;padding:12px 15px;background:var(--panel);display:flex;flex-direction:column;gap:2px}
.stat .v{font-family:var(--f-mono);font-size:20px;font-weight:600;font-variant-numeric:tabular-nums;letter-spacing:-.02em}
.stat .k{font-family:var(--f-mono);font-size:9.5px;letter-spacing:.15em;text-transform:uppercase;color:var(--ink-3)}

.ctl{display:flex;gap:7px;align-items:center;flex-wrap:wrap}
.btn{
  appearance:none;border:1px solid var(--line-2);background:var(--panel);color:var(--ink-2);
  border-radius:3px;height:32px;padding:0 12px;cursor:pointer;
  font-family:var(--f-mono);font-size:10px;letter-spacing:.13em;text-transform:uppercase;
  display:inline-flex;align-items:center;gap:7px;transition:all .18s;white-space:nowrap;
}
.btn:hover{border-color:var(--acc-live);color:var(--ink)}
.btn[aria-pressed="true"]{color:var(--acc-live);border-color:var(--acc-live);background:color-mix(in srgb,var(--acc-live) 12%,transparent)}
.seg{display:inline-flex;border:1px solid var(--line-2);border-radius:3px;overflow:hidden;background:var(--panel)}
.seg button{
  appearance:none;border:0;border-right:1px solid var(--line);background:transparent;color:var(--ink-3);
  font-family:var(--f-mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;
  padding:8px 12px;cursor:pointer;transition:all .18s;
}
.seg button:last-child{border-right:0}
.seg button:hover{color:var(--ink)}
.seg button[aria-pressed="true"],.seg button[aria-selected="true"]{background:color-mix(in srgb,var(--acc-live) 16%,transparent);color:var(--acc-live)}

/* ---------- rail ---------- */
.rail{
  position:sticky;top:env(safe-area-inset-top,0px);z-index:60;
  background:color-mix(in srgb,var(--bg) 84%,transparent);
  backdrop-filter:blur(16px) saturate(1.4);-webkit-backdrop-filter:blur(16px) saturate(1.4);
  border-block:1px solid var(--line);height:var(--rail-h);
}
.rail-in{height:100%;display:flex;flex-direction:column;justify-content:center;gap:8px}
.rail-top{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap}
.rail-readout{display:flex;align-items:center;gap:13px;min-width:0;flex-wrap:wrap}
.rail-band{
  font-family:var(--f-mono);font-weight:600;font-size:11px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--acc-live);white-space:nowrap;text-shadow:0 0 16px color-mix(in srgb,var(--acc-live) 70%,transparent);
}
.rail-vals{display:flex;gap:11px;font-family:var(--f-mono);font-size:11.5px;color:var(--ink-2);font-variant-numeric:tabular-nums;flex-wrap:wrap}
.rail-vals b{color:var(--ink-4);font-weight:400}
.rail-vals span{white-space:nowrap}

.ruler{position:relative;height:24px;user-select:none}
.ruler-track{position:absolute;inset:0 0 10px 0;display:flex;border:1px solid var(--line-2);border-radius:2px;overflow:hidden}
.rseg{height:100%;position:relative;cursor:pointer;transition:filter .2s;opacity:.85}
.rseg:hover{filter:brightness(1.3);opacity:1}
.rseg.done::after{content:"";position:absolute;inset:auto 0 0 0;height:2px;background:var(--ink)}
.ruler-ticks{position:absolute;inset:auto 0 0 0;height:10px}
.tick{position:absolute;top:0;transform:translateX(-50%);font-family:var(--f-mono);font-size:8.5px;color:var(--ink-4);white-space:nowrap}
.tick::before{content:"";position:absolute;left:50%;top:-3px;width:1px;height:3px;background:var(--line-2)}
.marker{position:absolute;top:-4px;bottom:10px;width:2px;background:var(--ink);transform:translateX(-1px);pointer-events:none}
.marker::before{content:"";position:absolute;top:-4px;left:-3px;width:8px;height:8px;border-radius:50%;background:var(--ink);box-shadow:0 0 10px var(--acc-live)}

/* ---------- sections ---------- */
section{scroll-margin-top:calc(var(--rail-h) + 16px)}
.sec{padding-block:clamp(46px,9vh,104px);border-top:1px solid var(--line)}
.sec-head{display:flex;flex-direction:column;gap:11px;margin-bottom:30px;max-width:var(--readw)}
.sec-head h2{font-size:clamp(25px,3.4vw,40px)}
.sec-head p{color:var(--ink-2)}
.lead{font-size:clamp(17px,1.9vw,21px);line-height:1.55;max-width:var(--readw)}
.prose p + p{margin-top:15px}
.prose{color:var(--ink-2);max-width:var(--readw)}
.prose strong{color:var(--ink);font-weight:600}

.grid2{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:clamp(22px,3.6vw,56px);align-items:start}
.grid-eq{display:grid;gap:10px}
.eq{border:1px solid var(--line);border-radius:4px;background:var(--panel);padding:15px 17px;position:relative}
.eq .f{font-family:var(--f-mono);font-size:19px;font-weight:600;letter-spacing:-.01em;color:var(--ink)}
.eq .d{font-size:13.5px;color:var(--ink-2);margin-top:7px;line-height:1.55}
.eq .d code{font-family:var(--f-mono);font-size:12px;background:var(--panel-2);border:1px solid var(--line);padding:1px 5px;border-radius:3px}

.pullnote{border-left:2px solid var(--acc-live);padding:3px 0 3px 17px;font-style:italic;color:var(--ink-2);max-width:var(--readw)}

/* ---------- band articles ---------- */
.band{padding-block:clamp(44px,10vh,110px);border-top:1px solid var(--line);display:grid;gap:22px}
.band-hd{display:flex;align-items:flex-end;justify-content:space-between;gap:18px;flex-wrap:wrap}
.band-id{display:flex;align-items:center;gap:11px}
.band-swatch{width:30px;height:9px;border-radius:1px;background:var(--acc);box-shadow:0 0 16px var(--acc)}
.band-id .eyebrow{color:var(--acc)}
.band h2{font-size:clamp(32px,5.2vw,58px);letter-spacing:-.036em;margin-top:6px}
.band-lede{font-size:clamp(16.5px,1.8vw,19.5px);color:var(--ink-2);max-width:var(--readw)}
.band-lede strong{color:var(--ink);font-weight:600}

/* inline scope — scrolls WITH the content */
.scope{overflow:hidden}
.scope-canvas{display:block;width:100%;height:clamp(140px,20vh,190px)}
.scope-hd .rd{font-family:var(--f-mono);font-size:10px;color:var(--ink-2);letter-spacing:.06em;text-transform:none}
.scope-ft{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border-top:1px solid var(--line)}
.scope-ft .cell{padding:10px 13px;border-left:1px solid var(--line);min-width:0}
.scope-ft .cell:first-child{border-left:0}
.scope-ft .k{font-family:var(--f-mono);font-size:9px;letter-spacing:.15em;text-transform:uppercase;color:var(--ink-3)}
.scope-ft .v{font-family:var(--f-mono);font-size:13px;font-weight:500;margin-top:3px;font-variant-numeric:tabular-nums;word-break:break-word}

.specs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;background:var(--line);border:1px solid var(--line);border-radius:4px;overflow:hidden}
.spec{padding:13px 15px;background:var(--panel);min-width:0}
.spec .k{font-family:var(--f-mono);font-size:9px;letter-spacing:.15em;text-transform:uppercase;color:var(--ink-3)}
.spec .v{font-family:var(--f-mono);font-size:13px;font-weight:500;margin-top:4px;font-variant-numeric:tabular-nums;line-height:1.45;word-break:break-word}

.fieldnote{border-left:2px solid var(--acc);padding:3px 0 3px 17px;color:var(--ink-2);font-style:italic;max-width:var(--readw)}

/* drawers */
.deep{border:1px solid var(--line);border-radius:4px;background:var(--panel);overflow:hidden}
.deep-btn{
  appearance:none;width:100%;background:transparent;border:0;cursor:pointer;color:inherit;
  display:flex;align-items:center;justify-content:space-between;gap:14px;padding:13px 16px;text-align:left;
  font-family:var(--f-mono);font-size:10px;letter-spacing:.15em;text-transform:uppercase;color:var(--ink-2);transition:background .18s;
}
.deep-btn:hover{background:var(--panel-2);color:var(--ink)}
.deep-btn .chev{transition:transform .35s cubic-bezier(.2,.75,.2,1);color:var(--acc);font-size:14px;line-height:1}
.deep-btn[aria-expanded="true"] .chev{transform:rotate(90deg)}
.deep-panel{display:grid;grid-template-rows:0fr;transition:grid-template-rows .42s cubic-bezier(.2,.75,.2,1)}
.deep-panel.open{grid-template-rows:1fr}
.deep-panel > .inner{overflow:hidden;min-height:0}
.deep-body{padding:0 16px 18px;display:grid;gap:15px;border-top:1px solid var(--line);padding-top:15px}
.deep-row{display:grid;grid-template-columns:128px minmax(0,1fr);gap:16px;align-items:start}
.deep-row .k{font-family:var(--f-mono);font-size:9px;letter-spacing:.15em;text-transform:uppercase;color:var(--ink-3);padding-top:5px;line-height:1.5}
.deep-row .b{font-size:14.5px;color:var(--ink-2);line-height:1.62}
.deep-row .b strong{color:var(--ink);font-weight:600}

/* tables */
.tbl-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:4px;background:var(--panel)}
table{border-collapse:collapse;width:100%;min-width:520px;font-size:13px}
th,td{text-align:left;padding:9px 13px;border-bottom:1px solid var(--line);vertical-align:top}
tr:last-child td{border-bottom:0}
th{font-family:var(--f-mono);font-size:9px;letter-spacing:.15em;text-transform:uppercase;color:var(--ink-3);font-weight:500;background:var(--panel-2);white-space:nowrap}
td:first-child{font-family:var(--f-display);font-weight:600;font-size:13px;white-space:nowrap}
td.n{font-family:var(--f-mono);font-variant-numeric:tabular-nums;white-space:nowrap;color:var(--ink-2)}
td.note{color:var(--ink-2)}

.chips{display:flex;flex-wrap:wrap;gap:6px}
.chip{
  font-family:var(--f-mono);font-size:10.5px;letter-spacing:.04em;padding:5px 10px;border-radius:2px;
  border:1px solid color-mix(in srgb,var(--acc) 34%,var(--line));
  background:color-mix(in srgb,var(--acc) 9%,transparent);color:var(--ink-2);
}
.band-foot{display:flex;align-items:center;gap:11px;flex-wrap:wrap}
.readbtn .box{width:10px;height:10px;border-radius:1px;border:1px solid var(--line-2);transition:all .2s}
.readbtn[aria-pressed="true"] .box{background:var(--acc);border-color:var(--acc);box-shadow:0 0 9px var(--acc)}

/* level gating */
:root[data-level="curious"] .tech-only{display:none !important}

/* ---------- electron view ---------- */
.ev{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,.75fr);gap:18px;align-items:start}
#evCanvas{display:block;width:100%;height:clamp(280px,42vh,400px)}
.ev-side{display:grid;gap:14px}
.ev-state{font-family:var(--f-display);font-size:clamp(19px,2.3vw,25px);font-weight:600;color:var(--acc-live);line-height:1.2}
.ev-eq{font-family:var(--f-mono);font-size:12.5px;color:var(--ink-2);background:var(--panel-2);border:1px solid var(--line);border-radius:3px;padding:9px 11px;line-height:1.6}
.ev-desc{font-size:14.5px;color:var(--ink-2);line-height:1.6}
.ev-steps{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:4px;overflow:hidden}
.ev-step{
  display:grid;grid-template-columns:auto minmax(0,1fr);gap:11px;align-items:baseline;
  padding:9px 12px;background:var(--panel);cursor:pointer;transition:background .18s;
  font-size:13px;color:var(--ink-3);border:0;text-align:left;width:100%;font-family:var(--f-body);
}
.ev-step:hover{background:var(--panel-2);color:var(--ink-2)}
.ev-step.on{background:color-mix(in srgb,var(--acc-live) 14%,transparent);color:var(--ink)}
.ev-step .e{font-family:var(--f-mono);font-size:11px;color:var(--ink-4);white-space:nowrap;font-variant-numeric:tabular-nums}
.ev-step.on .e{color:var(--acc-live)}

/* ---------- element spectra ---------- */
.elem-wrap{display:grid;gap:16px}
.elem-pick{display:flex;flex-wrap:wrap;gap:6px}
.elem-pick .btn{font-size:10.5px}
#elemCanvas{display:block;width:100%;height:132px}
.elem-meta{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:1px;background:var(--line);border-top:1px solid var(--line)}
.elem-meta .cell{padding:11px 14px;background:var(--panel)}
.elem-meta .k{font-family:var(--f-mono);font-size:9px;letter-spacing:.15em;text-transform:uppercase;color:var(--ink-3)}
.elem-meta .v{font-family:var(--f-mono);font-size:12.5px;margin-top:3px;color:var(--ink-2);line-height:1.5}
#bohr{display:block;width:100%;height:auto}

/* ---------- multiband scene ---------- */
.scene-wrap{display:grid;gap:14px}
#sceneCanvas{display:block;width:100%;height:clamp(260px,44vh,420px);background:#000}
:root[data-theme="light"] #sceneCanvas{background:#111}
.scene-cap{font-size:14px;color:var(--ink-2);line-height:1.6;padding:13px 16px;border-top:1px solid var(--line);min-height:76px}
.scene-cap b{color:var(--ink);font-family:var(--f-display)}

/* ---------- particle radiation ---------- */
#deflectCanvas,#penCanvas{display:block;width:100%;height:clamp(186px,25vh,236px)}
.rad-note{display:grid;grid-template-columns:auto minmax(0,1fr);gap:14px;align-items:start;padding:12px 15px}
.rad-note .sym{
  font-family:var(--f-mono);font-size:20px;font-weight:600;color:var(--racc);
  width:40px;text-align:center;line-height:1.2;
}
.rad-note .sym small{display:block;font-size:8.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3);margin-top:3px}
.rad-note p{font-size:14px;color:var(--ink-2);line-height:1.6}
#radTable td:last-child{font-family:var(--f-mono);font-size:11px;letter-spacing:.06em;white-space:nowrap}

/* ---------- phenomena ---------- */
.phen-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(330px,1fr));gap:16px}
.phen canvas{display:block;width:100%;height:170px}
.phen-bd{padding:14px 16px;display:grid;gap:11px}
.phen-bd h3{font-size:17px}
.phen-bd p{font-size:14px;color:var(--ink-2);line-height:1.58}
.phen-ctl{display:flex;gap:12px;align-items:center;flex-wrap:wrap;font-family:var(--f-mono);font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3)}
.phen-ctl input[type=range]{flex:1;min-width:110px}
.phen-val{color:var(--acc-live);font-variant-numeric:tabular-nums;min-width:62px;text-align:right}

/* ---------- audio ---------- */
.aud{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:18px;align-items:start}
#audCanvas{display:block;width:100%;height:150px}
.aud-keys{display:flex;flex-wrap:wrap;gap:6px}
.aud-rows{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:4px;overflow:hidden}
.aud-row{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:12px;align-items:center;padding:10px 13px;background:var(--panel)}
.aud-row .lbl{font-family:var(--f-display);font-size:14px;font-weight:600}
.aud-row .dsc{font-size:13px;color:var(--ink-2);line-height:1.5}
.warnbox{
  border:1px solid color-mix(in srgb,var(--warn) 40%,var(--line));
  background:color-mix(in srgb,var(--warn) 9%,transparent);
  border-radius:4px;padding:13px 15px;font-size:13.5px;color:var(--ink-2);line-height:1.6;
}
.warnbox b{color:var(--warn);font-family:var(--f-mono);font-size:10px;letter-spacing:.15em;text-transform:uppercase;display:block;margin-bottom:5px}

/* ---------- industries ---------- */
.ind-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(290px,1fr));gap:14px}
.ind-bd{padding:0}
.ind-row{display:grid;grid-template-columns:78px minmax(0,1fr);gap:12px;padding:9px 14px;border-top:1px solid var(--line);font-size:13.5px;color:var(--ink-2);line-height:1.5}
.ind-row:first-child{border-top:0}
.ind-tag{font-family:var(--f-mono);font-size:9px;letter-spacing:.12em;text-transform:uppercase;color:var(--iacc);padding-top:3px}

/* ---------- instruments ---------- */
.scrub-top{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:18px;align-items:start;padding:18px 18px 12px}
.scrub-primary .k{font-family:var(--f-mono);font-size:9px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-3)}
.scrub-primary .v{
  font-family:var(--f-mono);font-size:clamp(32px,5.6vw,58px);font-weight:600;letter-spacing:-.04em;
  line-height:1.02;margin-top:5px;font-variant-numeric:tabular-nums;color:var(--acc-scrub);
  text-shadow:0 0 30px color-mix(in srgb,var(--acc-scrub) 45%,transparent);
}
.scrub-primary .sub{font-family:var(--f-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-2);margin-top:8px}
#scrubWave{display:block;width:100%;height:118px;border-block:1px solid var(--line)}
.slider-zone{padding:16px 18px 6px}
input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:24px;background:transparent;cursor:grab;display:block}
input[type=range]:active{cursor:grabbing}
input[type=range]::-webkit-slider-runnable-track{height:5px;border-radius:99px;background:var(--line-2)}
input[type=range]::-moz-range-track{height:5px;border-radius:99px;background:var(--line-2)}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:15px;height:15px;border-radius:50%;background:var(--acc-live);border:0;margin-top:-5px;box-shadow:0 0 12px var(--acc-live)}
input[type=range]::-moz-range-thumb{width:13px;height:13px;border-radius:50%;background:var(--acc-live);border:0;box-shadow:0 0 12px var(--acc-live)}
#scrubRange::-webkit-slider-runnable-track{
  background:linear-gradient(90deg,var(--b-radio),var(--b-micro) 14%,var(--b-thz) 26%,var(--b-ir) 34%,var(--b-vis) 40%,var(--b-uv) 50%,var(--b-xray) 66%,var(--b-gamma));
}
#scrubRange::-moz-range-track{
  background:linear-gradient(90deg,var(--b-radio),var(--b-micro) 14%,var(--b-thz) 26%,var(--b-ir) 34%,var(--b-vis) 40%,var(--b-uv) 50%,var(--b-xray) 66%,var(--b-gamma));
}
.slider-scale{display:flex;justify-content:space-between;font-family:var(--f-mono);font-size:8.5px;color:var(--ink-4);margin-top:-2px}
.scrub-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(152px,1fr));gap:1px;background:var(--line);border-top:1px solid var(--line)}
.sg{padding:12px 15px;background:var(--panel);min-width:0}
.sg .k{font-family:var(--f-mono);font-size:9px;letter-spacing:.15em;text-transform:uppercase;color:var(--ink-3)}
.sg .v{font-family:var(--f-mono);font-size:14.5px;font-weight:500;margin-top:3px;font-variant-numeric:tabular-nums;word-break:break-word}
.sg .v.txt{font-family:var(--f-display);font-size:13.5px;font-weight:500}

.scale-strip{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:4px;overflow:hidden}
.srow{display:grid;grid-template-columns:54px 100px 92px minmax(0,1fr);gap:14px;align-items:center;padding:10px 15px;background:var(--panel)}
.srow .mdl{width:54px;height:54px;display:block}
.srow .lam{font-family:var(--f-mono);font-size:13px;font-weight:500;font-variant-numeric:tabular-nums;white-space:nowrap;color:var(--sacc)}
.srow .bandtag{font-family:var(--f-mono);font-size:9px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-3);white-space:nowrap}
.srow .obj{font-size:13.5px;color:var(--ink-2);line-height:1.5}
.srow .obj b{color:var(--ink);font-family:var(--f-display);font-weight:600}

#atmo{display:block;width:100%;min-width:640px;height:auto}
.atmo-scroll{overflow-x:auto}
.legend{display:flex;flex-wrap:wrap;gap:9px 22px;padding:12px 16px;font-size:12.5px;color:var(--ink-2);border-top:1px solid var(--line)}
.legend span{display:inline-flex;align-items:center;gap:7px}
.legend i{width:10px;height:10px;border-radius:2px;display:inline-block}

.calc{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;background:var(--line)}
.calc-field{background:var(--panel);padding:14px 15px;display:flex;flex-direction:column;gap:9px}
.calc-field label{font-family:var(--f-mono);font-size:9px;letter-spacing:.15em;text-transform:uppercase;color:var(--ink-3)}
.calc-row{display:flex;gap:7px}
.calc-row input{flex:1;min-width:0;background:var(--panel-2);border:1px solid var(--line-2);border-radius:3px;padding:9px 11px;font-family:var(--f-mono);font-size:15px;color:var(--ink);font-variant-numeric:tabular-nums}
.calc-row select{background:var(--panel-2);border:1px solid var(--line-2);border-radius:3px;padding:9px 7px;font-family:var(--f-mono);font-size:12px;color:var(--ink-2);cursor:pointer}
.calc-out{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;padding:14px 16px;border-top:1px solid var(--line)}
.calc-out .band-name{font-family:var(--f-display);font-weight:600;font-size:17px;color:var(--acc-calc)}
.calc-out .desc{font-size:13.5px;color:var(--ink-2);flex:1;min-width:210px;line-height:1.55}

.ion{font-family:var(--f-mono);font-size:9px;letter-spacing:.14em;text-transform:uppercase;padding:4px 9px;border-radius:2px;white-space:nowrap;border:1px solid}
.ion.no{color:var(--good);border-color:color-mix(in srgb,var(--good) 44%,transparent);background:color-mix(in srgb,var(--good) 10%,transparent)}
.ion.yes{color:var(--crit);border-color:color-mix(in srgb,var(--crit) 46%,transparent);background:color-mix(in srgb,var(--crit) 11%,transparent)}

/* ---------- quiz ---------- */
.qlist{display:grid;gap:13px;max-width:860px}
.q{padding:16px 18px}
.qh{display:flex;gap:11px;align-items:baseline}
.qn{font-family:var(--f-mono);font-size:10.5px;color:var(--ink-4);flex:none}
.qt{font-family:var(--f-display);font-weight:600;font-size:16px;line-height:1.35}
.opts{display:grid;gap:6px;margin-top:12px}
.opt{
  appearance:none;text-align:left;cursor:pointer;border:1px solid var(--line);background:var(--panel-2);
  color:var(--ink-2);border-radius:3px;padding:9px 13px;font-family:var(--f-body);font-size:14.5px;line-height:1.45;transition:all .18s;
}
.opt:hover:not(:disabled){border-color:var(--line-2);color:var(--ink)}
.opt:disabled{cursor:default}
.opt.right{border-color:var(--good);background:color-mix(in srgb,var(--good) 13%,transparent);color:var(--ink)}
.opt.wrong{border-color:var(--crit);background:color-mix(in srgb,var(--crit) 12%,transparent);color:var(--ink)}
.why{margin-top:11px;font-size:13.5px;color:var(--ink-2);border-left:2px solid var(--line-2);padding-left:12px;line-height:1.6}
.score-card{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;padding:15px 18px;max-width:860px;margin-bottom:16px}
.score-card .s{font-family:var(--f-mono);font-size:26px;font-weight:600;font-variant-numeric:tabular-nums}
.score-card .l{font-family:var(--f-mono);font-size:9px;letter-spacing:.15em;text-transform:uppercase;color:var(--ink-3)}

footer{border-top:1px solid var(--line);padding-block:34px 48px;color:var(--ink-3);font-size:13px}
.foot-grid{display:flex;flex-wrap:wrap;gap:22px 48px;justify-content:space-between;align-items:start}
footer a{color:var(--ink-2);text-decoration:underline;text-underline-offset:3px;text-decoration-color:var(--line-2)}
footer a:hover{color:var(--ink)}
.consts{font-family:var(--f-mono);font-size:11px;line-height:1.9;color:var(--ink-3)}

/* ---------- responsive ---------- */
@media (max-width:1040px){
  .grid2{grid-template-columns:minmax(0,1fr)}
  .ev{grid-template-columns:minmax(0,1fr)}
  .aud{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:760px){
  :root{--rail-h:88px}
  .scope-ft{grid-template-columns:repeat(2,minmax(0,1fr))}
  .scope-ft .cell:nth-child(3){border-left:0}
  .scope-ft .cell:nth-child(n+3){border-top:1px solid var(--line)}
  .specs{grid-template-columns:minmax(0,1fr)}
  .calc{grid-template-columns:minmax(0,1fr)}
  .deep-row{grid-template-columns:minmax(0,1fr);gap:4px}
  .deep-row .k{padding-top:0}
  .srow{grid-template-columns:42px 92px minmax(0,1fr);row-gap:2px}
  .srow .mdl{width:42px;height:42px}
  .srow .bandtag{grid-column:3}
  .srow .obj{grid-column:1/-1}
  .rail-vals{gap:9px;font-size:10.5px}
  .mast-stats .stat{flex:1 1 120px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
  #field{opacity:.3}
}

/* ============================================================
   v5 — persistent controls, scale glyphs, new modules
   ============================================================ */

.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.skip{
  position:absolute;left:-9999px;top:0;z-index:80;
  font-family:var(--f-mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--ink);text-decoration:none;background:var(--panel-solid);
  border:1px solid var(--acc-live);padding:8px 12px;border-radius:3px;
}
.skip:focus{left:16px;top:16px}

/* ---------- rail: now carries the controls ---------- */
:root{--rail-h:104px}
.rail-top{align-items:center}
.rail-ctl{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.rail-prog{white-space:nowrap}
.btn-sq{padding:0;width:32px;justify-content:center}
.rail .seg button{padding:7px 11px}

.nav-panel{
  position:absolute;left:0;right:0;top:100%;
  background:color-mix(in srgb,var(--bg) 96%,transparent);
  backdrop-filter:blur(18px) saturate(1.3);-webkit-backdrop-filter:blur(18px) saturate(1.3);
  border-bottom:1px solid var(--line);box-shadow:var(--shadow);
  max-height:min(62vh,520px);overflow-y:auto;
}
.nav-grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));
  gap:1px;padding-block:1px;background:var(--line);
}
.nav-link{
  display:block;padding:11px 14px;background:var(--bg);text-decoration:none;
  font-family:var(--f-display);font-size:13.5px;font-weight:500;color:var(--ink-2);
  transition:background .16s,color .16s;
}
.nav-link:hover{background:var(--panel-2);color:var(--ink)}
.nav-link.is-band{font-family:var(--f-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3)}
.nav-link.is-band:hover{color:var(--acc-live)}

/* ---------- scale anchor cards ---------- */
.scalecard{overflow:hidden}
.scale-cv{display:block;width:100%;height:clamp(130px,17vh,164px)}
#scrubScale2{display:block;width:100%;height:150px;border-top:1px solid var(--line)}

/* ---------- scene chips ---------- */
.scene-chips{display:flex;flex-wrap:wrap;gap:6px;padding:0 16px 15px}
.scene-chips .btn{font-size:9.5px;height:28px;padding:0 10px;letter-spacing:.1em}
#sceneCanvas{cursor:default}
.scene-cap b{color:var(--ink);font-family:var(--f-display);font-weight:600}

/* ---------- timeline ---------- */
.timeline{position:relative;display:grid;gap:0;padding-left:clamp(56px,7vw,92px)}
.tl-rail{position:absolute;left:clamp(23px,3.2vw,40px);top:8px;bottom:8px;width:2px;background:var(--line)}
.tl-fill{
  position:absolute;inset:0;background:linear-gradient(var(--b-radio),var(--b-thz) 26%,var(--b-vis) 52%,var(--b-uv) 72%,var(--b-gamma));
  transform-origin:top;transform:scaleY(0);transition:transform .25s linear;
}
.tl-item{
  position:relative;padding:20px 0 24px;border-bottom:1px solid var(--line);
  opacity:1;transition:opacity .5s ease, transform .5s cubic-bezier(.2,.75,.2,1);
}
.tl-item:last-child{border-bottom:0}
@media (prefers-reduced-motion:no-preference){
  .tl-item{opacity:.6;transform:translateY(6px)}
  .tl-item.on{opacity:1;transform:none}
}
.tl-dot{
  position:absolute;left:calc(clamp(23px,3.2vw,40px) - clamp(56px,7vw,92px) - 4px);top:27px;
  width:10px;height:10px;border-radius:50%;background:var(--bg);
  border:2px solid var(--tacc);box-shadow:0 0 0 3px var(--bg), 0 0 14px var(--tacc);
}
.tl-year{font-family:var(--f-mono);font-size:12px;font-weight:600;color:var(--tacc);letter-spacing:.06em}
.tl-body h3{font-size:clamp(18px,2.2vw,23px);margin-top:5px}
.tl-who{font-family:var(--f-mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3);margin-top:5px}
.tl-body p{margin-top:11px;color:var(--ink-2);max-width:var(--readw);font-size:14.5px;line-height:1.65}

/* ---------- black body ---------- */
.bb{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,.65fr);gap:18px;align-items:start}
.bb-side{display:grid;gap:14px}
#bbCanvas{display:block;width:100%;height:clamp(230px,32vh,300px)}
.bb-read{display:grid;grid-template-columns:repeat(auto-fit,minmax(110px,1fr));gap:16px}
.bb-read .k{font-family:var(--f-mono);font-size:9px;letter-spacing:.15em;text-transform:uppercase;color:var(--ink-3)}
.bb-read .v{font-family:var(--f-mono);font-size:19px;font-weight:600;margin-top:4px;font-variant-numeric:tabular-nums}
.bb-read .sw{margin-top:6px;height:26px;border-radius:3px;border:1px solid var(--line-2);background:#fff}

/* ---------- 3D wave ---------- */
#emCanvas{display:block;width:100%;height:clamp(250px,36vh,340px);touch-action:pan-y;cursor:grab}
#emCanvas:active{cursor:grabbing}

/* ---------- dose ---------- */
.dose-list{display:grid}
.dose-row{
  appearance:none;border:0;border-top:1px solid var(--line);background:transparent;cursor:pointer;
  display:grid;grid-template-columns:minmax(0,1fr) minmax(90px,2fr) auto;gap:14px;align-items:center;
  padding:11px 16px;text-align:left;color:var(--ink-2);font-family:var(--f-body);font-size:14px;
  transition:background .16s;width:100%;
}
.dose-row:first-child{border-top:0}
.dose-row:hover{background:var(--panel-2);color:var(--ink)}
.dose-lbl{line-height:1.4}
.dose-bar{height:7px;border-radius:99px;background:color-mix(in srgb,var(--line-2) 55%,transparent);overflow:hidden;display:block}
.dose-bar > span{display:block;height:100%;border-radius:99px;background:var(--good)}
.dose-row.warn .dose-bar > span{background:var(--warn)}
.dose-row.crit .dose-bar > span{background:var(--crit)}
.dose-val{font-family:var(--f-mono);font-size:12.5px;font-variant-numeric:tabular-nums;white-space:nowrap;color:var(--ink)}
.dose-more{
  padding:2px 16px 14px calc(16px);font-size:13.5px;color:var(--ink-2);line-height:1.6;
  border-left:2px solid var(--line-2);margin-left:16px;max-width:var(--readw);
}

@media (max-width:1040px){
  .bb{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:760px){
  :root{--rail-h:120px}
  .rail-ctl{gap:6px}
  .rail-ctl .seg button{padding:6px 9px;font-size:9.5px}
  .rail-prog{display:none}
  .timeline{padding-left:44px}
  .tl-rail{left:14px}
  .tl-dot{left:-34px}
  .dose-row{grid-template-columns:minmax(0,1fr) auto;row-gap:8px}
  .dose-bar{grid-column:1/-1}
}

/* fixes: band anchoring, scene aspect, quieter hotspots */
.band{scroll-margin-top:calc(var(--rail-h) + 18px)}
#sceneCanvas{width:100%;aspect-ratio:104 / 43;height:auto;max-height:62vh;display:block}
.scale-cv{height:clamp(150px,19vh,182px)}
@media (max-width:760px){
  :root{--rail-h:130px}
  .tick-alt{display:none}
  .scene-chips .btn{font-size:9px;padding:0 8px}
}

/* ============================================================
   v6 — folded text, provenance, 3D glyphs, phone performance
   ============================================================ */

/* ---------- folded text ---------- */
.clamp{
  display:-webkit-box;-webkit-box-orient:vertical;
  -webkit-line-clamp:var(--clamp-lines,3);line-clamp:var(--clamp-lines,3);
  overflow:hidden;
}
.clamp.open{display:block;-webkit-line-clamp:unset;line-clamp:unset;overflow:visible}
.more{
  appearance:none;background:transparent;border:0;cursor:pointer;padding:6px 0 0;
  font-family:var(--f-mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--acc-live);display:inline-flex;align-items:center;gap:6px;
}
.more::after{content:"\203a";font-size:14px;line-height:1;transform:rotate(90deg);transition:transform .25s}
.more[aria-expanded="true"]::after{transform:rotate(-90deg)}
.more:hover{color:var(--ink)}
.warnbox.clamp{display:-webkit-box}

/* ---------- turnable 3D glyphs ---------- */
canvas.turnable{cursor:grab;touch-action:pan-y}
canvas.turnable:active{cursor:grabbing}
.scalecard.is3d .panel-hd::after,.panel.is3d .panel-hd::after{
  content:"drag to turn";font-family:var(--f-mono);font-size:8.5px;letter-spacing:.12em;
  color:var(--ink-4);text-transform:none;white-space:nowrap;
}

/* ---------- constants ---------- */
.const-table{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:4px;overflow:hidden}
.const-row{
  display:grid;grid-template-columns:62px minmax(0,1fr) minmax(0,auto);gap:16px;
  padding:13px 16px;background:var(--panel);align-items:start;
}
.const-sym{
  font-family:var(--f-mono);font-size:17px;font-weight:600;color:var(--acc-live);
  line-height:1.2;padding-top:1px;
}
.const-name{font-family:var(--f-display);font-size:14.5px;font-weight:600;line-height:1.35}
.const-d{font-size:13.5px;color:var(--ink-2);line-height:1.55;margin-top:5px;max-width:62ch}
.const-val{
  font-family:var(--f-mono);font-size:12.5px;color:var(--ink);font-variant-numeric:tabular-nums;
  white-space:nowrap;padding-top:3px;
}
.tag{
  font-family:var(--f-mono);font-size:8.5px;letter-spacing:.12em;text-transform:uppercase;
  color:var(--ink-3);border:1px solid var(--line-2);border-radius:2px;padding:2px 6px;
  margin-left:7px;white-space:nowrap;vertical-align:middle;
}

/* ---------- footer ---------- */
footer{padding-block:44px 56px}
.foot-top{display:flex;justify-content:space-between;align-items:flex-start;gap:24px;flex-wrap:wrap;margin-bottom:30px}
.foot-mark{
  font-family:var(--f-display);font-size:19px;font-weight:700;letter-spacing:-.02em;color:var(--ink);
}
.foot-lede{font-size:13.5px;color:var(--ink-3);max-width:46ch;margin-top:6px;line-height:1.6}
.cred-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:26px 34px}
.cred-grid h4{
  font-family:var(--f-mono);font-size:9.5px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--ink-3);font-weight:500;margin-bottom:9px;
}
.cred-grid p{font-size:13px;color:var(--ink-2);line-height:1.65}
.cred-grid p + p{margin-top:8px}
.cred-list{list-style:none;padding:0;margin:0;display:grid;gap:10px}
.cred-list li{display:grid;gap:2px;font-size:13px;line-height:1.55}
.cred-list li span{color:var(--ink-3);font-size:12.5px}
.foot-rule{height:1px;background:var(--line);margin:30px 0 16px}
.foot-base{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-family:var(--f-mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-4);
}

/* ---------- info dialog ---------- */
.dlg{
  border:1px solid var(--line-2);border-radius:6px;padding:0;
  background:var(--panel-solid);color:var(--ink);
  width:min(760px,calc(100vw - 32px));max-height:min(80vh,780px);
  box-shadow:0 30px 90px -30px rgba(0,0,0,.85);
}
.dlg::backdrop{background:rgba(4,6,11,.72);backdrop-filter:blur(3px)}
.dlg-hd{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:12px 14px;border-bottom:1px solid var(--line);position:sticky;top:0;
  background:var(--panel-solid);z-index:2;
}
.dlg-bd{padding:20px 22px 26px;overflow-y:auto;max-height:calc(min(80vh,780px) - 60px)}
.dlg-pane h3{font-size:19px;margin-bottom:14px}
.dlg-pane p{font-size:14px;color:var(--ink-2);line-height:1.68;max-width:66ch}
.dlg-pane p + p{margin-top:12px}
.dlg-pane .cred-grid{margin-top:2px}
.dlg-hd .seg{flex-wrap:wrap}

/* ---------- phone and tablet ---------- */
@media (max-width:900px){
  .const-row{grid-template-columns:46px minmax(0,1fr);row-gap:6px}
  .const-val{grid-column:2;white-space:normal;padding-top:0}
}
@media (pointer:coarse), (max-width:820px){
  /* a fixed full-viewport canvas repaints on every scroll frame on mobile */
  #field{display:none}
  body::before{opacity:.5}
  /* backdrop-filter and large shadows are the two costliest paint jobs here */
  .rail{backdrop-filter:none;-webkit-backdrop-filter:none;background:var(--bg)}
  .nav-panel{backdrop-filter:none;-webkit-backdrop-filter:none;background:var(--bg)}
  .panel{box-shadow:none}
  .panel::before,.panel::after{display:none}
  /* skip rendering work for sections that are nowhere near the viewport */
  .sec{content-visibility:auto;contain-intrinsic-size:auto 900px}
  #premise,#toolkit{content-visibility:visible}
  .tl-item{opacity:1;transform:none}
}
@media (max-width:560px){
  .dlg{width:calc(100vw - 16px);max-height:88vh}
  .dlg-bd{max-height:calc(88vh - 60px);padding:16px 16px 22px}
  .foot-base{flex-direction:column;gap:6px}
}

/* Units must not be uppercased: a micro sign turns into a capital Mu,
   so "300 um" reads as "300 MM". Any element that carries a unit opts out. */
.panel-hd .rd{text-transform:none;letter-spacing:.04em;font-size:10px;color:var(--ink-2)}
#scenePick button{text-transform:none;letter-spacing:.03em;font-size:10.5px}
.slider-scale span,.tick,.const-val,.dose-val,.scope-ft .v,.rail-vals{text-transform:none}
.cred-list li a{width:fit-content}
.dlg-pane .btn{white-space:nowrap}

/* ============================================================
   READING LEVEL - two copies of the page, one visible
   ============================================================ */
:root[data-level="curious"] .tech-text,
:root[data-level="curious"] .tech-only,
:root[data-level="curious"] .tech-lede{display:none !important}
:root[data-level="technical"] .kid-text,
:root[data-level="technical"] .kid-only{display:none !important}

.band-kid,
.sec-kid{
  font-size:clamp(17px,1.9vw,20.5px);
  line-height:1.62;
  color:var(--ink);
  max-width:var(--readw);
  font-family:var(--f-body);
}
.fieldnote.kid-text{font-size:clamp(15.5px,1.7vw,18px);color:var(--ink-2)}
.sec-head .sec-kid{color:var(--ink-2)}

/* the level switch is the one control that must never scroll away */
.rail .seg[aria-label="Detail level"] button{font-weight:600}

/* ============================================================
   SECTION FOLDS - a whole section collapsed behind its heading
   ============================================================ */
.fold-btn{
  display:inline-flex;align-items:center;gap:9px;
  margin-top:4px;padding:8px 14px;
  border:1px solid var(--line-2);border-radius:4px;
  background:var(--panel-2);color:var(--ink-2);
  font-family:var(--f-mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;
  cursor:pointer;transition:color .2s,border-color .2s,background .2s;
}
.fold-btn:hover{color:var(--ink);border-color:var(--acc-live)}
.fold-btn .chev{
  display:inline-block;width:7px;height:7px;
  border-right:1.6px solid currentColor;border-bottom:1.6px solid currentColor;
  transform:rotate(45deg) translateY(-1px);transition:transform .25s;
}
.fold-btn[aria-expanded="true"] .chev{transform:rotate(-135deg) translateY(-1px)}
.fold-body[hidden]{display:none}
.fold-body{animation:foldIn .34s ease both}
@keyframes foldIn{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}

/* ============================================================
   ACOUSTIC STRIP - the wave you already know
   ============================================================ */
.ac-bands{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border-bottom:1px solid var(--line)}
.ac-band{
  padding:13px 14px;background:var(--panel-solid);cursor:pointer;text-align:left;
  border:0;border-top:2px solid transparent;color:inherit;transition:background .2s,border-color .2s;
}
.ac-band:hover{background:var(--panel-2)}
.ac-band[aria-pressed="true"]{border-top-color:var(--acc-live);background:var(--panel-2)}
.ac-band .n{font-family:var(--f-display);font-weight:600;font-size:15px;display:block}
.ac-band .r{font-family:var(--f-mono);font-size:10.5px;letter-spacing:.04em;color:var(--ink-3);margin-top:4px;display:block}
.ac-band .a{font-size:12.5px;color:var(--ink-3);margin-top:6px;display:block;font-style:italic}
#acCanvas{display:block;width:100%;height:190px}
.ac-foot{padding:14px 16px;border-top:1px solid var(--line);display:grid;gap:11px}
.ac-foot p{font-size:14px;color:var(--ink-2);line-height:1.6;max-width:var(--readw)}
.ac-marks{display:flex;gap:7px;flex-wrap:wrap}
.ac-marks button{
  border:1px solid var(--line);border-radius:3px;background:transparent;color:var(--ink-2);
  padding:5px 9px;font-family:var(--f-mono);font-size:10px;letter-spacing:.06em;cursor:pointer;
  transition:color .18s,border-color .18s;
}
.ac-marks button:hover{color:var(--ink);border-color:var(--acc-live)}
.ac-ctl{display:flex;gap:12px;align-items:center;flex-wrap:wrap;font-family:var(--f-mono);font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3)}
.ac-ctl input[type=range]{flex:1;min-width:130px}
.ac-read{color:var(--acc-live);font-variant-numeric:tabular-nums;text-transform:none;letter-spacing:.02em}
@media (max-width:640px){ .ac-bands{grid-template-columns:1fr} }

/* ============================================================
   OPTICS - pop-up screens
   ============================================================ */
.opt-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(215px,1fr));gap:12px;margin-top:20px}
.opt-card{
  display:flex;flex-direction:column;gap:0;text-align:left;cursor:pointer;
  border:1px solid var(--line);border-radius:5px;background:var(--panel);color:inherit;
  padding:0;overflow:hidden;transition:border-color .2s,transform .2s;
}
.opt-card:hover{border-color:var(--acc-live);transform:translateY(-2px)}
.opt-card canvas{display:block;width:100%;height:104px}
.opt-card .cap{padding:11px 13px 13px;border-top:1px solid var(--line)}
.opt-card .t{font-family:var(--f-display);font-weight:600;font-size:15px;display:block}
.opt-card .s{font-family:var(--f-mono);font-size:9.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3);margin-top:5px;display:block}
.opt-card .o{font-family:var(--f-mono);font-size:9.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--acc-live);margin-top:8px;display:block}

#optDialog .dlg-bd{padding:0}
.opt-stage{position:relative;background:var(--bg-2);border-bottom:1px solid var(--line)}
.opt-body{padding:18px 20px 24px;display:grid;gap:14px}
.opt-body h3{font-size:20px}
.opt-body .why{font-size:15px;color:var(--ink);line-height:1.62;max-width:66ch;font-family:var(--f-body)}
.opt-body .tech-text{font-size:14px;color:var(--ink-2);line-height:1.68;max-width:66ch}
.opt-ctl{
  display:flex;gap:13px;align-items:center;flex-wrap:wrap;
  font-family:var(--f-mono);font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3);
  border-top:1px solid var(--line);padding-top:14px;
}
.opt-ctl input[type=range]{flex:1;min-width:140px}
.opt-val{color:var(--acc-live);font-variant-numeric:tabular-nums;min-width:74px;text-align:right;text-transform:none}
.opt-nav{display:flex;gap:7px;flex-wrap:wrap}
.opt-nav button{
  border:1px solid var(--line);border-radius:3px;background:transparent;color:var(--ink-3);
  padding:5px 10px;font-family:var(--f-mono);font-size:9.5px;letter-spacing:.08em;text-transform:uppercase;cursor:pointer;
}
.opt-nav button[aria-current="true"]{color:var(--ink);border-color:var(--acc-live)}
.opt-nav button:hover{color:var(--ink)}

@media (pointer:coarse),(max-width:820px){
  .opt-card:hover{transform:none}
  .opt-grid{grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:9px}
  .opt-card canvas{height:82px}
}

/* ============================================================
   LAB GRIDS - wave behaviour and optics share one 2 x 3 layout
   ============================================================ */
.opt-grid.lab-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:4px}
.lab-grid .opt-card canvas{height:168px}
.lab-grid .opt-card .cap{padding:13px 15px 15px}
.lab-grid .opt-card .t{font-size:16px}
@media (max-width:980px){ .opt-grid.lab-grid{grid-template-columns:repeat(2,minmax(0,1fr))} }
@media (max-width:560px){
  .opt-grid.lab-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}
  .lab-grid .opt-card canvas{height:104px}
  .lab-grid .opt-card .cap{padding:9px 10px 11px}
  .lab-grid .opt-card .t{font-size:13.5px}
  .lab-grid .opt-card .s{display:none}
}
.lab-dlg .dlg-bd{padding:0}
.lab-dlg .opt-stage{--labz:1}
.lab-dlg canvas.lab-cv{display:block;width:100%;height:calc(clamp(230px,38vh,330px) * var(--labz));transition:height .25s ease}
@media (pointer:coarse),(max-width:820px){
  .lab-dlg canvas.lab-cv{height:calc(clamp(200px,32vh,260px) * var(--labz))}
}
.zoomer{position:absolute;right:10px;bottom:10px;display:flex;gap:6px;z-index:2}
.zoomer button{
  width:34px;height:34px;border-radius:4px;border:1px solid var(--line-2);background:var(--panel-solid);
  color:var(--ink-2);font-family:var(--f-mono);font-size:16px;line-height:1;cursor:pointer;
}
.zoomer button:hover{color:var(--ink);border-color:var(--acc-live)}

/* ============================================================
   DUAL-TRACK OVERVIEW
   ============================================================ */
.duo-tools{display:flex;flex-wrap:wrap;gap:10px;align-items:center;padding:12px 14px;border-bottom:1px solid var(--line)}
.duo-tools .seg button{min-width:40px}
.duo-hint{font-family:var(--f-mono);font-size:9.5px;letter-spacing:.08em;color:var(--ink-4);margin-left:auto}
#duoCanvas{display:block;width:100%;height:320px;touch-action:none;cursor:grab}
#duoCanvas:active{cursor:grabbing}
.duo-read{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;background:var(--line);border-top:1px solid var(--line)}
.duo-read .c{background:var(--panel-solid);padding:11px 14px}
.duo-read .k{font-family:var(--f-mono);font-size:9.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-4)}
.duo-read .v{font-family:var(--f-mono);font-size:14px;margin-top:5px;color:var(--ink);font-variant-numeric:tabular-nums}
.duo-read .v.t{font-family:var(--f-body);font-size:14.5px;line-height:1.45}
@media (max-width:720px){
  #duoCanvas{height:250px}
  .duo-read{grid-template-columns:repeat(2,minmax(0,1fr))}
  .duo-hint{margin-left:0;width:100%}
}

/* ============================================================
   HYDROGEN, FIELD LAB, DOSE
   ============================================================ */
.bohr-tools{display:flex;flex-wrap:wrap;gap:10px;padding:12px 14px;border-bottom:1px solid var(--line)}
#bohrCanvas{display:block;width:100%;height:420px}
.bohr-read{padding:11px 14px;border-top:1px solid var(--line);font-family:var(--f-mono);font-size:12px;color:var(--ink-2);min-height:40px}
@media (max-width:720px){ #bohrCanvas{height:360px} }

.em-tabs{display:flex;flex-wrap:wrap;gap:0;border-bottom:1px solid var(--line);overflow-x:auto}
.em-tabs button{
  flex:1 1 auto;padding:11px 14px;background:transparent;border:0;border-bottom:2px solid transparent;
  color:var(--ink-3);font-family:var(--f-mono);font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;cursor:pointer;white-space:nowrap;
}
.em-tabs button[aria-selected="true"]{color:var(--ink);border-bottom-color:var(--acc-live);background:var(--panel-2)}
.em-tabs button:hover{color:var(--ink)}
#emCanvas{display:block;width:100%;height:360px;touch-action:pan-y}
.em-read{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;background:var(--line);border-top:1px solid var(--line)}
.em-read .c{background:var(--panel-solid);padding:10px 14px}
.em-read .k{font-family:var(--f-mono);font-size:9.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-4)}
.em-read .v{font-family:var(--f-mono);font-size:13.5px;margin-top:4px;color:var(--ink);font-variant-numeric:tabular-nums}
.em-ctl-wrap{display:grid;gap:12px}
.em-note{font-size:14px;color:var(--ink-2);line-height:1.62;max-width:var(--readw)}
.em-note.kid-text{font-size:15.5px;color:var(--ink)}
.em-alt{flex-wrap:wrap}
@media (max-width:720px){
  #emCanvas{height:300px}
  .em-read{grid-template-columns:repeat(2,minmax(0,1fr))}
  .em-tabs button{flex:0 0 auto;padding:10px 12px}
}

#doseCanvas{display:block;width:100%;height:230px}
.dose-ctl{display:flex;gap:14px;align-items:center;padding:12px 16px;border-top:1px solid var(--line)}
.dose-ctl input[type=range]{flex:1}
.dose-card{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1.6fr) auto;gap:18px;align-items:center;padding:14px 16px;border-top:1px solid var(--line)}
.dose-now .v{display:block;font-family:var(--f-mono);font-size:24px;font-weight:600;color:var(--acc-live);font-variant-numeric:tabular-nums}
.dose-now .l{display:block;font-family:var(--f-display);font-weight:600;font-size:15px;margin-top:4px}
.dose-cmp{font-size:14px;color:var(--ink-2);line-height:1.6}
.dose-cmp b{color:var(--ink);font-family:var(--f-mono);font-weight:600}
.dose-caveat{margin-top:12px;font-size:13.5px;color:var(--ink-3)}
.linkbtn{background:none;border:0;padding:0;color:var(--acc-live);font:inherit;text-decoration:underline;text-underline-offset:3px;cursor:pointer}
@media (max-width:720px){
  #doseCanvas{height:210px}
  .dose-card{grid-template-columns:1fr}
}
.dlg-pane .dose-pop p{font-size:14px;color:var(--ink-2);line-height:1.68}

/* ============================================================
   CURIOUS VIEW - friendlier for younger readers
   ============================================================ */
.kid-card{
  margin:18px 0 6px;padding:16px 18px 16px;border-radius:12px;max-width:var(--readw);
  background:linear-gradient(135deg, color-mix(in srgb, var(--acc) 14%, var(--panel-solid)), var(--panel-solid));
  border:1px solid color-mix(in srgb, var(--acc) 45%, var(--line));
}
.kid-card .kc-hd{font-family:var(--f-display);font-weight:700;font-size:13px;letter-spacing:.06em;text-transform:uppercase;color:var(--acc)}
.kid-card p{font-size:clamp(16px,1.8vw,19px);line-height:1.6;color:var(--ink);margin-top:8px;font-family:var(--f-body)}
.kc-meet{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-top:12px}
.kc-k{font-family:var(--f-mono);font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3);margin-right:4px}
.kc-chip{padding:5px 11px;border-radius:999px;background:color-mix(in srgb, var(--acc) 18%, transparent);color:var(--ink);font-family:var(--f-display);font-size:13px;font-weight:500}
.try-hint{
  display:flex;gap:10px;align-items:flex-start;max-width:var(--readw);
  margin:0 0 12px;padding:11px 14px;border-radius:10px;
  background:color-mix(in srgb, var(--b-vis) 12%, var(--panel-solid));border:1px dashed color-mix(in srgb, var(--b-vis) 55%, var(--line));
  font-family:var(--f-display);font-size:15px;line-height:1.5;color:var(--ink);
}
.try-hint::before{content:"";flex:0 0 10px;height:10px;margin-top:6px;border-radius:50%;background:var(--b-vis);box-shadow:0 0 0 4px color-mix(in srgb, var(--b-vis) 25%, transparent)}
.try-hint.in-panel{margin:12px 14px 0;max-width:none}
:root[data-level="curious"] .sec-head h2{letter-spacing:-.01em}
:root[data-level="curious"] .panel{border-radius:10px}
:root[data-level="curious"] .opt-card{border-radius:12px}
:root[data-level="curious"] .fold-btn{border-radius:999px;padding:9px 16px}
.fold-at{margin:18px 0 0}
.fold-at > .fold-body{margin-top:14px}

.journey-note{max-width:var(--readw);margin:26px 0 0;padding:10px 14px;border-left:2px solid var(--b-radio);font-family:var(--f-mono);font-size:11.5px;line-height:1.6;color:var(--ink-3)}
:root[data-level="curious"] .journey-note{display:none}

/* ============================================================
   START HERE, TOUR BAR, PAUSE CONTROL
   ============================================================ */
.start-here{display:flex;flex-wrap:wrap;align-items:center;gap:12px 18px;margin:22px 0 4px}
.start-btn{
  display:grid;gap:3px;text-align:left;cursor:pointer;
  padding:14px 20px 14px 18px;border-radius:14px;
  border:1px solid color-mix(in srgb, var(--b-vis) 60%, var(--line));
  background:linear-gradient(120deg, color-mix(in srgb, var(--b-vis) 18%, var(--panel-solid)), color-mix(in srgb, var(--b-uv) 14%, var(--panel-solid)));
  color:var(--ink);box-shadow:0 10px 30px -18px color-mix(in srgb, var(--b-vis) 70%, transparent);
  transition:transform .2s ease, box-shadow .2s ease;
}
.start-btn:hover{transform:translateY(-2px);box-shadow:0 16px 36px -18px color-mix(in srgb, var(--b-vis) 80%, transparent)}
.start-btn .sb-k{font-family:var(--f-display);font-weight:700;font-size:19px}
.start-btn .sb-t{font-family:var(--f-body);font-size:15.5px;color:var(--ink)}
.start-btn .sb-m{font-family:var(--f-mono);font-size:10px;letter-spacing:.08em;color:var(--ink-3)}
.start-alt{font-family:var(--f-mono);font-size:11px;letter-spacing:.06em;color:var(--ink-3);text-decoration:underline;text-underline-offset:3px}
.start-alt:hover{color:var(--ink)}

.tour-bar{
  position:fixed;left:50%;bottom:14px;transform:translateX(-50%);z-index:60;
  width:min(760px,calc(100vw - 20px));
  background:var(--panel-solid);color:var(--ink);
  border:1px solid color-mix(in srgb, var(--b-vis) 55%, var(--line));border-radius:16px;
  box-shadow:0 22px 60px -20px rgba(0,0,0,.75);
}
.tour-bar[hidden]{display:none}
.tb-in{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:10px 16px;padding:14px 16px 14px 18px;align-items:end}
.tb-prog{grid-column:1/-1;display:flex;gap:6px}
.tb-prog span{flex:1;height:4px;border-radius:4px;background:var(--line-2)}
.tb-prog span.done{background:color-mix(in srgb, var(--b-vis) 55%, var(--line-2))}
.tb-prog span.now{background:var(--b-vis)}
.tb-step{font-family:var(--f-mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-3)}
.tb-title{font-family:var(--f-display);font-size:19px;margin-top:3px;outline:none}
.tb-text{font-family:var(--f-body);font-size:15.5px;line-height:1.5;color:var(--ink);margin-top:5px}
.tb-ctl{display:flex;gap:8px;align-items:center;flex-wrap:wrap;justify-content:flex-end}
.tb-ctl .btn[disabled]{opacity:.4;cursor:default}
.tb-next{background:var(--b-vis);color:#06120c;border-color:var(--b-vis);font-weight:600}
.tb-act{border-color:color-mix(in srgb, var(--b-vis) 60%, var(--line-2))}
body.touring{padding-bottom:230px}
.tour-focus{outline:3px solid var(--b-vis);outline-offset:6px;border-radius:12px;transition:outline-color .3s}
@media (max-width:640px){
  .tb-in{grid-template-columns:1fr;padding:12px 12px 12px 14px}
  .tb-ctl{justify-content:stretch}
  .tb-ctl .btn:not(.tb-x){flex:1}
  .tb-text{font-size:14.5px}
  body.touring{padding-bottom:320px}
  .start-btn{width:100%}
}

.ico-pause{display:inline-flex;gap:3px;width:10px;height:11px}
.ico-pause::before,.ico-pause::after{content:"";flex:1;background:currentColor;border-radius:1px}
#motionBtn.is-paused .ico-pause{gap:0;width:10px}
#motionBtn.is-paused .ico-pause::before{flex:none;width:0;height:0;background:none;border-left:10px solid currentColor;border-top:5.5px solid transparent;border-bottom:5.5px solid transparent;border-radius:0}
#motionBtn.is-paused .ico-pause::after{display:none}
#motionBtn.is-paused{color:var(--b-vis);border-color:var(--b-vis)}

canvas[tabindex]:focus-visible, svg[tabindex]:focus-visible{outline:2px solid var(--acc-live);outline-offset:-2px}
@media (max-width:480px){
  .rail-ctl{gap:5px;flex-wrap:nowrap}
  .rail-ctl .btn{padding:0 8px;letter-spacing:.08em}
  .rail-ctl .btn-sq{width:30px;padding:0}
  .rail-ctl .seg button{padding:6px 7px;letter-spacing:.06em}
}
@media (max-width:360px){
  #infoBtn{display:none}
}