:root{--cyan:#38e8ff;--hot:#ff2e88;--amber:#ffb020;--good:#7dffb0;--bg:#03060a;--ink:#cbf6ff;--faint:#3f7c8c;
  --na:#ff9e3d;--k:#b57cff;--mg:#f2f6ff;--tendon:#7dffb0;--bad:#ff4a6e;
  --mono:"SF Mono",ui-monospace,"Cascadia Mono","JetBrains Mono",Menlo,Consolas,monospace}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%;overflow:hidden;background:var(--bg);color:var(--ink);font-family:var(--mono)}
body{-webkit-font-smoothing:antialiased;user-select:none}
canvas#gl{position:fixed;inset:0;width:100%;height:100%;display:block}
.hidden{display:none !important}
#hud{position:fixed;inset:0;pointer-events:none}
#topbar{position:absolute;left:0;right:0;top:0;display:flex;justify-content:space-between;align-items:center;
  padding:13px 22px;font-size:12px;letter-spacing:.16em;text-transform:uppercase}
#t-level{color:var(--cyan);text-shadow:0 0 12px rgba(56,232,255,.7)}
.dim{margin-left:14px;color:#2f5c68;letter-spacing:.08em}
.tb-right{display:flex;gap:22px}
.stat i{font-style:normal;color:var(--faint);font-size:10px;letter-spacing:.24em}
.stat b{font-weight:400;margin-left:6px;font-size:14px}

#panel{position:absolute;display:flex;flex-direction:column;gap:13px}
.pblock{border-left:1px solid rgba(56,232,255,.22);padding-left:12px}
.pblock.grow{flex:1;border:0}
.plabel{font-size:9.5px;letter-spacing:.28em;color:var(--faint);margin-bottom:6px}
.plabel .num{color:var(--ink);float:right;letter-spacing:.06em}
.bar{height:4px;background:rgba(56,232,255,.13);position:relative;overflow:hidden}
.bar.big{height:9px}
.bar i{position:absolute;inset:0 auto 0 0;width:0%;background:var(--cyan);box-shadow:0 0 12px var(--cyan);transition:width .12s linear}
.bar.strain i{background:var(--bad);box-shadow:0 0 12px var(--bad)}
.bar.strain.warn{animation:flick .5s steps(2) infinite}
@keyframes flick{0%,100%{opacity:1}50%{opacity:.45}}
.tip{font-size:10.5px;line-height:1.7;color:#7ab0c0;letter-spacing:.03em}
.tip b{color:var(--ink);font-weight:400}
.tip.dim2{color:#4d7c8a;margin-top:6px}
.keys{font-size:9.5px;line-height:1.9;color:#2f5c68;letter-spacing:.08em}
.keys b{color:var(--faint);font-weight:400}

/* the three electrolytes */
#tools{display:flex;flex-direction:column;gap:5px}
.tool{pointer-events:auto;position:relative;display:flex;align-items:center;gap:9px;padding:6px 9px;cursor:pointer;
  border:1px solid rgba(56,232,255,.16);background:rgba(56,232,255,.03);overflow:hidden;transition:.12s}
.tool:hover{border-color:rgba(56,232,255,.4)}
.tool.on{border-color:currentColor;background:rgba(255,255,255,.07);box-shadow:0 0 18px -4px currentColor}
.tool.broke{opacity:.38}
.tool .sym{font-size:14px;width:24px;text-align:center;color:currentColor;text-shadow:0 0 12px currentColor}
.tool .nm{font-size:9.5px;letter-spacing:.2em;color:var(--ink)}
.tool .ds{font-size:9px;letter-spacing:.04em;color:#5d93a3;display:block;margin-top:1px}
.tool .hk{margin-left:auto;font-size:9px;color:var(--faint)}
.tool .cd{position:absolute;left:0;bottom:0;height:2px;background:currentColor;width:0%;opacity:.85}
.t-na{color:var(--na)}.t-k{color:var(--k)}.t-mg{color:var(--mg)}
.c-na{color:var(--na)}.c-k{color:var(--k)}.c-mg{color:var(--mg)}.c-bad{color:var(--bad)}.c-tendon{color:var(--tendon)}
.hi{color:var(--cyan)}

#toast{position:absolute;left:50%;top:15%;transform:translateX(-50%);font-size:32px;letter-spacing:.3em;color:#fff;opacity:0;
  pointer-events:none;white-space:nowrap;text-shadow:0 0 26px var(--cyan),0 0 55px var(--cyan)}
#toast.pop{animation:toast 1.1s ease-out}
#toast.bad{text-shadow:0 0 26px var(--bad),0 0 55px var(--bad)}
@keyframes toast{0%{opacity:0;transform:translateX(-50%) scale(.86)}15%{opacity:1;transform:translateX(-50%) scale(1)}70%{opacity:1}100%{opacity:0}}

.ready{position:absolute;left:50%;top:32%;transform:translateX(-50%);text-align:center;pointer-events:none;max-width:560px}
.ready-name{font-size:30px;letter-spacing:.34em;color:#fff;text-indent:.34em;text-shadow:0 0 22px var(--cyan),0 0 50px var(--cyan)}
.ready-teach{margin-top:14px;font-size:12px;line-height:1.9;letter-spacing:.04em;color:#8fc4d2}
.ready-key{margin-top:16px;font-size:12px;letter-spacing:.24em;color:var(--ink);animation:pulse 1.4s ease-in-out infinite}
.ready-key b{color:#fff;border:1px solid rgba(203,246,255,.5);padding:2px 8px;margin:0 2px}
@keyframes pulse{0%,100%{opacity:.45}50%{opacity:1}}

.screen{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;z-index:10;overflow-y:auto;
  background:radial-gradient(ellipse at 50% 45%,rgba(4,14,20,.86),rgba(2,4,7,.97));backdrop-filter:blur(3px)}
.wrap{text-align:center;max-width:620px;padding:30px;margin:auto;animation:fade .35s ease}
.wrap.wide{max-width:1120px;width:94%}
@keyframes fade{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.logo{font-size:64px;letter-spacing:.30em;font-weight:400;color:#fff;text-indent:.30em;
  text-shadow:0 0 8px var(--cyan),0 0 34px var(--cyan),0 0 80px rgba(56,232,255,.6)}
h2{font-size:23px;letter-spacing:.32em;font-weight:400;margin-bottom:14px;text-indent:.32em;text-shadow:0 0 24px rgba(56,232,255,.6)}
h2.bad{color:var(--bad);text-shadow:0 0 26px var(--bad)}h2.good{color:var(--good);text-shadow:0 0 26px var(--good)}
h3{font-size:11px;letter-spacing:.24em;color:var(--cyan);margin:20px 0 6px}
.tag{font-size:11.5px;letter-spacing:.18em;color:#4d8494;margin-bottom:24px}
.foot{margin-top:24px;font-size:10px;letter-spacing:.16em;color:#33636f}.foot span{color:var(--cyan)}
p{font-size:12px;line-height:1.85;color:#8fc4d2;letter-spacing:.03em;margin-bottom:8px}p b{font-weight:400;color:var(--ink)}
p.mini{font-size:10.5px;color:#4d7c8a;margin-bottom:10px}
.help-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 40px;text-align:left;margin-bottom:6px}
.menu{display:flex;flex-direction:column;gap:9px;align-items:center;margin-top:22px}
.screen button{pointer-events:auto;font-family:var(--mono);font-size:12px;letter-spacing:.24em;background:transparent;color:var(--ink);
  border:1px solid rgba(56,232,255,.32);padding:11px 40px;min-width:280px;cursor:pointer;transition:.14s;text-indent:.24em}
.screen button:hover,.screen button:focus{background:rgba(56,232,255,.11);border-color:var(--cyan);color:#fff;box-shadow:0 0 24px rgba(56,232,255,.34);outline:none}
.screen button[disabled]{opacity:.3;pointer-events:none}
.screen button.small{min-width:0;padding:8px 14px;font-size:10px;letter-spacing:.18em}
.screen button.small i{font-style:normal;color:var(--faint);margin-right:6px}

.legend{display:grid;gap:10px;text-align:left;margin-bottom:8px}
.legend.two{grid-template-columns:repeat(2,1fr)}
.legend.three{grid-template-columns:repeat(3,1fr)}
.legend.four{grid-template-columns:repeat(4,1fr)}
.lg{display:flex;flex-direction:column;gap:6px;padding:11px 12px;border:1px solid rgba(56,232,255,.14);background:rgba(56,232,255,.03)}
.lg .nm{font-size:10.5px;letter-spacing:.2em;color:currentColor}
.lg .ds{font-size:10px;color:#7fb3c2;letter-spacing:.02em;line-height:1.55}
.lg .ds b{color:var(--ink);font-weight:400}
.lg .cost{font-size:9px;letter-spacing:.14em;color:var(--faint);margin-top:2px}
.lg canvas{width:100%;height:auto;display:block;background:#02050a;border:1px solid rgba(56,232,255,.08)}
@media (max-width:1000px){.legend.three,.legend.four{grid-template-columns:repeat(2,1fr)}.help-grid{grid-template-columns:1fr}}

.circuit{display:grid;grid-template-columns:repeat(3,1fr);gap:4px 18px;text-align:left;font-size:10.5px;letter-spacing:.1em;color:var(--ink);margin-bottom:14px}
.circuit span i{font-style:normal;color:var(--faint);display:inline-block;width:26px}
.circuit span em{font-style:normal;color:#4d7c8a;margin-left:6px;letter-spacing:.04em}
.plabel.mt{margin-top:26px;text-align:center}
.row{display:flex;gap:6px;justify-content:center;flex-wrap:wrap;margin-top:8px}
#practice{display:grid;grid-template-columns:repeat(3,1fr);gap:5px;margin-top:8px}
#practice button{min-width:0;width:100%;text-align:left;text-indent:0;padding:7px 10px;font-size:9.5px;letter-spacing:.1em}