:root{color-scheme:light;box-sizing:border-box;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}html{scroll-padding-top:env(safe-area-inset-top,0px)}body{margin:0;padding:0;font:14px -apple-system,BlinkMacSystemFont,sans-serif;background:#fff;color:#000}img{max-width:100%}[hidden]:not([hidden=until-found i]){display:none!important}
/* Layout: a full-screen 3D cleanroom, lit yellow the way real lithography bays are, with the EUV machine cut open inside.
   Dark glass panels sit over it. One committed look: amber room light, violet for the invisible EUV, warm white text. */
:root{
  --room:#2a2213;--glass:rgba(20,17,11,.88);--glass-edge:rgba(255,214,130,.16);--ink:#fbf3df;--ink-2:#e6dabd;--muted:#b6a783;--faint:#86795c;
  --rule:rgba(255,226,160,.16);--rule-2:rgba(255,226,160,.08);
  --amber:#ffc23d;--amber-ink:#ffd36e;--euv:#b18cff;--euv-2:#d9c8ff;--good:#6fdc9b;--bad:#ff7a6b;
  --f-display:'Archivo','Helvetica Neue',Arial,sans-serif;--f-ui:'IBM Plex Sans','Helvetica Neue',Arial,sans-serif;--f-mono:'JetBrains Mono',ui-monospace,'SF Mono',Menlo,monospace;
  color-scheme:dark}
html,body{margin:0;height:100%;background:var(--room);color:var(--ink);overflow:hidden}
body{font-family:var(--f-ui);font-size:15px;line-height:1.55;-webkit-font-smoothing:antialiased}
[hidden]{display:none!important}
button{font:inherit;cursor:pointer;color:inherit}
:focus-visible{outline:2px solid var(--amber);outline-offset:3px}
#stage{position:fixed;inset:0}
.gl{display:block;width:100%;height:100%;touch-action:none;cursor:grab}
.gl.grabbing{cursor:grabbing}

/* title */
#title{position:fixed;inset:0;z-index:20;display:flex;align-items:flex-end;padding:0 clamp(16px,5vw,72px) calc(env(safe-area-inset-bottom,0px) + clamp(24px,6vh,64px));background:linear-gradient(90deg,rgba(18,14,7,.92) 0,rgba(18,14,7,.72) 40%,rgba(18,14,7,0) 72%);pointer-events:none}
.tbox{max-width:640px;display:flex;flex-direction:column;gap:18px;pointer-events:auto}
.kick{font-family:var(--f-mono);font-size:11.5px;font-weight:500;letter-spacing:.16em;text-transform:uppercase;color:var(--amber)}
#title h1{font-family:var(--f-display);font-weight:900;font-variation-settings:'wdth' 125;font-size:clamp(46px,7.2vw,104px);line-height:.88;margin:0;letter-spacing:-.035em;text-transform:uppercase}
#title h1 span{display:block;color:var(--euv)}
.lede{font-size:clamp(16px,1.55vw,19px);line-height:1.55;color:var(--ink-2);max-width:54ch;margin:0}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.btn{font-weight:600;font-size:15px;border-radius:6px;padding:11px 18px;border:1.5px solid var(--amber);background:var(--amber);color:#1a1205}
.btn:hover{background:var(--amber-ink)}
.btn.ghost{background:transparent;color:var(--ink);border-color:var(--rule)}
.btn.ghost:hover{border-color:var(--ink-2)}
.btn.ghost.on{border-color:var(--euv);color:var(--euv-2)}
.btn:disabled{opacity:.4;cursor:default}
.btn.fire{background:var(--euv);border-color:var(--euv);color:#140c26;min-width:150px}
.hint{font-family:var(--f-mono);font-size:11.5px;color:var(--muted)}
.kbd{display:inline-block;border:1px solid var(--rule);border-radius:4px;padding:0 6px;margin-right:4px;color:var(--ink-2)}
.foot{font-size:13px;color:var(--muted);max-width:60ch;margin:0}

/* hud */
#hud{position:fixed;left:0;right:0;top:0;z-index:15;display:flex;align-items:center;gap:12px;padding:calc(env(safe-area-inset-top,0px) + 12px) clamp(12px,2.2vw,24px) 8px;pointer-events:none}
#hud>*{pointer-events:auto}
.brand{font-family:var(--f-display);font-weight:800;font-size:15px;letter-spacing:-.02em;text-transform:uppercase;white-space:nowrap}
.brand i{font-style:normal;color:var(--euv)}
.tabs{display:flex;gap:2px;background:var(--glass);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border:1px solid var(--glass-edge);border-radius:8px;padding:3px}
.tab{background:none;border:0;color:var(--muted);font-size:13px;font-weight:500;padding:6px 11px;border-radius:6px;white-space:nowrap}
.tab span{font-family:var(--f-mono);font-size:10.5px;margin-right:6px;color:var(--faint)}
.tab b{font-weight:inherit}.tab em{display:none;font-style:normal}
.tab.on{background:var(--amber);color:#1a1205}.tab.on span{color:#6b4a07}
#btnNotes{margin-left:auto;background:var(--glass);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border:1px solid var(--glass-edge);border-radius:8px;padding:7px 12px;font-size:13px;color:var(--ink-2)}

/* panel */
#panel{position:fixed;z-index:12;right:clamp(10px,1.6vw,20px);top:calc(env(safe-area-inset-top,0px) + 60px);bottom:clamp(10px,2vh,20px);width:min(440px,40vw);overflow:auto;background:var(--glass);backdrop-filter:blur(18px) saturate(1.2);-webkit-backdrop-filter:blur(18px) saturate(1.2);border:1px solid var(--glass-edge);box-shadow:0 20px 50px rgba(0,0,0,.35);border-radius:14px;scrollbar-width:thin;scrollbar-color:rgba(255,226,160,.25) transparent}
#panelBody{padding:20px 20px 24px;display:flex;flex-direction:column;gap:15px}
.eyebrow{font-family:var(--f-mono);font-size:11px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--amber)}
#panel h2{font-family:var(--f-display);font-weight:800;font-variation-settings:'wdth' 112;font-size:25px;line-height:1.12;letter-spacing:-.03em;margin:0;text-wrap:balance}
#panel h3{font-family:var(--f-display);font-weight:700;font-size:15px;letter-spacing:-.01em;margin:6px 0 0;color:var(--amber-ink);text-transform:uppercase}
#panel p{margin:0;color:var(--ink-2)}
.small{font-size:13px;color:var(--muted)!important}
.seg{display:inline-flex;align-self:flex-start;flex-wrap:wrap;border:1px solid var(--rule);border-radius:7px;padding:2px;background:rgba(0,0,0,.2)}
.seg button{background:none;border:0;color:var(--muted);font-size:13px;font-weight:500;padding:5px 11px;border-radius:5px}
.seg button[aria-pressed=true]{background:var(--ink);color:#1a1205}
.seg.small button{font-size:12.5px;padding:4px 9px}
.obj{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}
.obj li{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:var(--ink-2)}
.obj .tick{flex:0 0 22px;height:22px;border-radius:5px;border:1.5px solid var(--rule);display:grid;place-items:center;font-family:var(--f-mono);font-size:10.5px;color:var(--muted)}
.obj li.ok{color:var(--ink)}.obj li.ok .tick{background:var(--good);border-color:var(--good);color:#06180d;font-weight:700}
.scope-box{margin:0;display:flex;flex-direction:column;gap:5px}
.scope-box canvas{width:100%;height:200px;display:block;border-radius:10px;border:1px solid var(--rule);touch-action:none;cursor:crosshair}
#micro,#ovl{height:170px}
#ovl{cursor:grab}
.scope-box figcaption,.chart-box figcaption{font-size:12px;color:var(--muted)}
.chart-box{margin:0;display:flex;flex-direction:column;gap:5px}
.chart-box canvas{width:100%;height:150px;display:block;background:rgba(0,0,0,.25);border:1px solid var(--rule-2);border-radius:10px}
.ctlgrid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px 14px}
.ctl{display:grid;grid-template-columns:1fr auto;gap:4px 10px;align-items:center;font-size:12.5px;color:var(--ink-2);min-width:0}
.ctl .k{grid-column:1/-1;line-height:1.3}
.ctl input[type=range]{width:100%;accent-color:var(--euv);min-width:0}
.ctl output{font-family:var(--f-mono);font-size:12px;min-width:52px;text-align:right;color:var(--ink)}
.opts{display:flex;flex-direction:column;gap:10px}
.opt{display:flex;flex-direction:column;gap:5px}
.opt .k,.ctl .k{font-size:12.5px;color:var(--muted)}
.readouts{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
.readouts div{display:flex;flex-direction:column;gap:2px;border-top:1.5px solid var(--amber);padding-top:7px;min-width:0}
.readouts span{font-size:11.5px;color:var(--muted);line-height:1.3}
.readouts b{font-family:var(--f-mono);font-weight:600;font-size:15px;font-variant-numeric:tabular-nums;color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.fact{font-size:14px;border-left:3px solid var(--euv);padding-left:12px}
.actions{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.actions .btn{padding:9px 15px;font-size:14px}
.note{font-size:12.5px;color:var(--muted)}
.steps-nav{display:flex;gap:6px}
.dot{width:28px;height:5px;border-radius:3px;border:0;background:var(--rule);padding:0}
.dot.done{background:var(--ink-2)}.dot.on{background:var(--amber)}
.fn{font-size:.68em;line-height:0;vertical-align:.6em;margin-left:1px}.fn a{color:var(--euv-2);text-decoration:none;font-family:var(--f-mono)}

/* labels over the 3D */
#labels{position:fixed;inset:0;pointer-events:none;z-index:10}
.lab{position:absolute;left:0;top:0;will-change:transform}
.lab i{position:absolute;left:-4px;top:-4px;width:8px;height:8px;border-radius:50%;background:var(--amber);box-shadow:0 0 0 3px rgba(255,194,61,.25)}
.lab .lx{position:absolute;left:12px;top:-30px;white-space:nowrap;background:rgba(20,17,11,.86);border:1px solid var(--glass-edge);padding:4px 8px 5px;border-radius:6px}
.lab.flip .lx{left:auto;right:12px;text-align:right}
.lab b{display:block;font-size:12.5px;font-weight:600;color:var(--ink);line-height:1.25}
.lab span{display:block;font-size:11px;color:var(--muted);line-height:1.3}

#toast{position:fixed;left:calc((100vw - min(440px,40vw) - 30px) / 2);bottom:24px;transform:translate(-50%,16px);opacity:0;z-index:25;background:var(--ink);color:#1a1205;padding:10px 16px;border-radius:9px;font-size:14px;font-weight:500;max-width:min(520px,86vw);text-align:center;transition:opacity .3s,transform .3s;pointer-events:none;box-shadow:0 8px 30px rgba(0,0,0,.4)}
#toast.on{opacity:1;transform:translate(-50%,0)}
#notes{position:fixed;inset:0;z-index:40;background:rgba(10,8,4,.6);display:grid;place-items:center;padding:16px}
.notes-card{background:#1d1810;border:1px solid var(--glass-edge);border-radius:14px;max-width:780px;width:100%;max-height:86vh;overflow:auto;padding:22px 24px;box-shadow:0 20px 60px rgba(0,0,0,.5)}
.notes-card h2{font-family:var(--f-display);font-weight:800;font-size:24px;text-transform:uppercase;letter-spacing:-.02em;margin:0}
.notes-card ol{padding-left:26px;margin:14px 0 0;display:flex;flex-direction:column;gap:8px;font-size:13.5px;color:var(--ink-2)}
.notes-card ol li::marker{font-family:var(--f-mono);color:var(--amber);font-size:12px}
.notes-card a{color:var(--ink-2);text-decoration-color:var(--faint);text-underline-offset:3px}
.notes-card li.hl{background:rgba(177,140,255,.16);border-radius:6px}
.notes-card p{font-size:13.5px;color:var(--ink-2);margin:10px 0 0}
.row-between{display:flex;justify-content:space-between;align-items:center;gap:12px}
.nofallback{display:none}
body.no3d .nofallback{display:flex;position:fixed;inset:0;align-items:center;justify-content:center;padding:24px;text-align:center;z-index:50;background:var(--room)}
@media (max-width:1080px){.brand{display:none}}
@media (max-width:820px){
  #title{align-items:flex-start;padding-top:calc(env(safe-area-inset-top,0px) + 28px);background:linear-gradient(180deg,rgba(18,14,7,.95) 0,rgba(18,14,7,.84) 58%,rgba(18,14,7,0) 88%)}
  #panel{left:8px;right:8px;width:auto;top:auto;bottom:8px;max-height:54vh;border-radius:12px}
  #panelBody{padding:14px 14px 18px;gap:13px}
  #panel h2{font-size:20px}
  #hud{gap:8px;padding-left:8px;padding-right:8px}
  .tab{padding:6px 8px;font-size:12px}.tab b,.tab span{display:none}.tab em{display:inline}
  #btnNotes{padding:7px 9px}
  .ctlgrid{grid-template-columns:minmax(0,1fr)}
  #toast{left:50%;bottom:auto;top:calc(env(safe-area-inset-top,0px) + 58px)}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}

/* ===== visual pass ===== */
:root{--glass:rgba(14,11,7,.86);--glass-edge:rgba(255,206,120,.14)}
#title h1{text-shadow:0 2px 30px rgba(0,0,0,.35)}
#title h1 span{background:linear-gradient(100deg,#c9a8ff 0%,#a77bff 45%,#8f6bff 100%);-webkit-background-clip:text;background-clip:text;color:transparent;filter:drop-shadow(0 0 22px rgba(167,123,255,.35))}
.lede{text-shadow:0 1px 14px rgba(0,0,0,.4)}
.btn{border-radius:8px;letter-spacing:.005em;transition:background .2s,border-color .2s,box-shadow .2s,transform .2s}
.btn:not(.ghost):hover{box-shadow:0 8px 28px -8px rgba(255,194,61,.55);transform:translateY(-1px)}
.btn.ghost{background:rgba(14,11,7,.45);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}
.btn.fire:hover{box-shadow:0 8px 30px -6px rgba(177,140,255,.65)}
#panel{box-shadow:0 30px 80px -20px rgba(0,0,0,.6),inset 0 1px 0 rgba(255,230,180,.06);border-radius:16px}
#panel p{line-height:1.6}
.tabs,#btnNotes{box-shadow:0 10px 30px -12px rgba(0,0,0,.5)}
.scope-box canvas,#panel canvas{border-color:rgba(255,226,160,.12)!important;box-shadow:inset 0 0 0 1px rgba(0,0,0,.4)}
.notes-card{background:linear-gradient(180deg,#1c160d,#141009)}
.notes-card .credit{font-family:var(--f-mono);font-size:11.5px;letter-spacing:.06em;color:var(--muted);border-top:1px solid var(--rule);padding-top:12px;margin-top:18px}
@media (prefers-reduced-motion:reduce){.btn{transition:none}.btn:hover{transform:none}}

/* Touch-sized targets without changing control IDs or gameplay. */
@media(max-width:820px){
  .tab,#btnNotes,.seg button,.seg.small button,.actions .btn{min-height:44px;box-sizing:border-box}
  .tab{padding:6px 9px}#hud{gap:5px}.tabs{padding:2px}
  .ctl input[type=range]{min-height:44px;margin:0}
  .steps-nav{gap:6px}.dot{width:44px;height:44px;border-radius:0;background:linear-gradient(var(--rule),var(--rule)) center/28px 5px no-repeat}
  .dot{background:linear-gradient(var(--rule),var(--rule)) center/28px 5px no-repeat!important}.dot.done{background:linear-gradient(var(--ink-2),var(--ink-2)) center/28px 5px no-repeat!important}.dot.on{background:linear-gradient(var(--amber),var(--amber)) center/28px 5px no-repeat!important}
  .lab .lx{width:max-content;max-width:150px;white-space:normal;box-sizing:border-box}.lab span{font-size:11px}
  #panel{max-height:54dvh}#panelBody{overflow-wrap:break-word}
  .notes-card{width:auto;max-width:100%;padding:16px;box-sizing:border-box}
}
@media(max-width:640px){#title .tbox{gap:16px}.kick{letter-spacing:.1em}.notes-card ol{padding-left:22px}}
/* Panel sizing on small laptops: narrower panel, compact type, so the 3D view keeps most of the screen */
:root{--panel-w:clamp(300px,27vw,400px)}
@media (min-width:821px){#panel{box-sizing:border-box;width:var(--panel-w);bottom:auto;max-height:calc(100vh - env(safe-area-inset-top,0px) - 60px - clamp(10px,2vh,20px))}#toast{left:calc((100vw - var(--panel-w) - 30px) / 2)}}
@media (min-width:821px) and (max-width:1440px),(min-width:821px) and (max-height:820px){#panelBody{padding:16px 16px 20px;gap:12px;font-size:14px}#panel h2{font-size:21px}#panel p{line-height:1.55}}