:root{--bench:#eef2f7;--glass:#8c9ab0;--lab-h:2px}@media (prefers-color-scheme:dark){:root{--bench:#121926;--glass:#8796ad}}.lab-page h1{letter-spacing:-.025em;margin:6px 0 10px;font-size:clamp(28px,4vw,40px);line-height:1.12}.lab-page .lede{margin-bottom:18px}.lab [hidden]{display:none!important}.lab{background:var(--sheet);border:1px solid var(--rule);border-radius:var(--r-m);margin:0 0 34px;overflow:hidden}.lab-bar{border-bottom:1px solid var(--rule);background:var(--rule-soft);flex-wrap:wrap;align-items:center;gap:10px 14px;padding:12px 14px;display:flex}.lab-score{font-variant-numeric:tabular-nums;margin-left:auto;font-size:14px;font-weight:700}.seg{border:1px solid var(--rule);background:var(--sheet);border-radius:999px;padding:3px;display:inline-flex}.seg button{color:var(--ink-2);font:600 14px/1.2 var(--ui);cursor:pointer;background:0 0;border:0;border-radius:999px;padding:7px 13px}.seg button.on{background:var(--ink);color:var(--paper)}.sel-inline{color:var(--ink-2);align-items:center;gap:8px;font-size:14px;font-weight:600;display:inline-flex}.lab select{font:500 14.5px/1.2 var(--ui);color:var(--ink);background:var(--sheet);border:1px solid var(--rule);border-radius:var(--r-s);max-width:100%;padding:8px 10px}.lab .btn{cursor:pointer;font-family:var(--ui)}.lab .btn:disabled{opacity:.45;cursor:not-allowed}.lab-body{grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);display:grid}.lab-stage{background:var(--bench);border-right:1px solid var(--rule);flex-direction:column;gap:10px;padding:14px;display:flex}.lab-stage>svg{width:100%;height:auto;max-height:460px;display:block}.lab-ctrl{flex-direction:column;gap:14px;min-width:0;padding:16px;display:flex}.ctrl-block{gap:8px;display:grid}.ctrl-h{text-transform:uppercase;letter-spacing:.06em;color:var(--ink-3);font-size:12.5px;display:block}.ctrl-note{color:var(--ink-2);margin:0;font-size:14.5px}.stage-cap{color:var(--ink-2);text-align:center;min-height:1.4em;margin:0;font-size:13.5px}.row{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.chips{flex-wrap:wrap;gap:6px;display:flex}.chips button{border:1px solid var(--rule);background:var(--sheet);color:var(--ink);font:600 14px/1 var(--ui);cursor:pointer;border-radius:999px;min-width:52px;padding:7px 12px}.chips button.on{border-color:var(--omr);background:var(--omr-soft);color:var(--omr)}.lab-acts{flex-wrap:wrap;gap:8px;display:flex}.lab-acts .btn{white-space:nowrap}.lab-acts .btn i{background:var(--rule-soft);width:20px;height:20px;color:var(--ink-2);border-radius:50%;place-items:center;font-size:12px;font-style:normal;display:inline-grid}.lab-acts .btn.accent i{color:#fff;background:#ffffff40}.toggle{cursor:pointer;align-items:center;gap:8px;font-size:14.5px;font-weight:600;display:flex}.toggle input{width:18px;height:18px;accent-color:var(--omr)}.lab-log{border-left:3px solid var(--omr);background:var(--sheet);border-radius:0 var(--r-s) var(--r-s) 0;color:var(--ink);padding:10px 12px;font-size:14.5px;line-height:1.45}.lab-stage .lab-log{border:1px solid var(--rule);border-left:3px solid var(--omr)}.lab button:focus-visible,.lab [role=button]:focus-visible{outline:2px solid var(--omr);outline-offset:2px}.lab caption{text-align:left;color:var(--ink);padding:0 0 8px;font-size:14px;font-weight:700}.rec-wrap{border-top:1px solid var(--rule);padding:16px}.rec{font-size:14px}.rec td,.rec th{vertical-align:top;padding:9px 11px}.rec tr.empty td{color:var(--ink-3);text-align:center}.rec tr.warn td{background:var(--omr-soft)}.sw{vertical-align:-1px;border:1px solid #00000026;border-radius:50%;width:12px;height:12px;margin-right:6px;display:inline-block}.lab svg .bench{stroke:var(--rule);stroke-width:2px}.lab svg .glass{fill:none;stroke:var(--glass);stroke-width:var(--lab-h);stroke-linejoin:round}.lab svg .lbl{font:600 11px var(--ui);fill:var(--ink-2)}.lab svg .stand{fill:var(--ink-3);opacity:.55}.ft-svg{--f1:transparent;--f2:transparent}.ft-svg .acid{fill:#e6e2aa8c}.ft-svg .salt{fill:#f4f1ec;stroke:var(--glass);stroke-width:1px;transition:fill .3s}.ft-svg .burner rect{fill:#7d8796}.ft-svg .burner .air{fill:#2b3240}.ft-svg .flame{transform-origin:300px 190px;animation:1.1s ease-in-out infinite alternate flick}.ft-svg .ft-s0{stop-color:#4678ff8c}.ft-svg .ft-s1{stop-color:#6e96ff4d}.ft-svg .ft-s2{stop-color:#8caaff14}.ft-svg.lit .ft-s0{stop-color:var(--f1);stop-opacity:.95}.ft-svg.lit .ft-s1{stop-color:var(--f1);stop-opacity:.85}.ft-svg.lit .ft-s2{stop-color:var(--f1);stop-opacity:.3}.ft-svg stop{transition:stop-color .35s}.ft-svg .f-in{fill:#3c6effbf}.ft-svg .f-streak{fill:var(--f2);opacity:0;transition:opacity .3s}.ft-svg.mixed .f-streak{animation:.7s ease-in-out infinite alternate streak}.ft-svg.lit .f-out{filter:drop-shadow(0 0 10px var(--f1))}.ft-svg .cobalt rect{fill:#1c3ad252;stroke:#2846dccc;stroke-width:2px}.ft-svg .wire{transition:transform .6s cubic-bezier(.5,0,.3,1)}.ft-svg .nichrome{stroke:#9aa3ad;stroke-width:1.6px}.ft-svg .holder{stroke:#c9d6e6;stroke-width:5px;stroke-linecap:round}.ft-svg .loop{fill:none;stroke:#9aa3ad;stroke-width:1.6px}.ft-svg .coat{opacity:0;transition:opacity .25s}@keyframes flick{0%{transform:scale(1)}to{transform:scale(.97,1.04)}}@keyframes streak{0%{opacity:.15}to{opacity:.8}}.sa-body{grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr)}.sample-tag{text-align:center;margin:0;font-size:15px;font-weight:700}.sa-svg{max-height:380px!important}.sa-svg .sa-liq{fill:#0000;opacity:0;transition:fill 1s,opacity .4s}.sa-svg.has-liq .sa-liq{opacity:1}.sa-svg .sa-solid{opacity:0;stroke:#0000001f}.sa-svg.has-solid .sa-solid{opacity:1}.sa-svg .sa-ppt{opacity:0;stroke:#0000001f;stroke-width:.6px;transform:translateY(-70px)}.sa-svg.has-ppt .sa-ppt{opacity:1;transition:transform 1.6s cubic-bezier(.3,.6,.4,1),opacity .5s;transform:none}.sa-svg .sa-ring,.sa-svg .sa-layer{opacity:0;transition:opacity 1.2s}.sa-svg.has-ring .sa-ring,.sa-svg.has-layer .sa-layer{opacity:1}.sa-svg .sa-bub circle{fill:#ffffffbf;stroke:#788caa99;stroke-width:.6px;opacity:0}.sa-svg.has-bub .sa-bub circle{animation:1.3s linear infinite bub}.sa-svg.has-bub .sa-bub circle:nth-child(2){animation-delay:.3s}.sa-svg.has-bub .sa-bub circle:nth-child(3){animation-delay:.6s}.sa-svg.has-bub .sa-bub circle:nth-child(4){animation-delay:.9s}.sa-svg.has-bub .sa-bub circle:nth-child(5){animation-delay:.45s}@keyframes bub{0%{opacity:0;transform:translateY(0)}15%{opacity:1}to{opacity:0;transform:translateY(-80px)}}.sa-svg .sa-gas{opacity:0;transition:opacity 1s}.sa-svg.has-gas .sa-gas{opacity:1;animation:2.4s ease-in-out infinite alternate drift}@keyframes drift{0%{transform:translate(0)}to{transform:translate(6px,-6px)}}.sa-svg .sa-strip,.sa-svg .sa-rod,.sa-svg .sa-side,.sa-svg .sa-heat,.sa-svg .sa-flame,.sa-svg .sa-drop{display:none}.sa-svg.has-strip .sa-strip,.sa-svg.has-rod .sa-rod,.sa-svg.has-side .sa-side,.sa-svg.has-heat .sa-heat{display:inline}.sa-svg .sa-strip rect{stroke:#0003;stroke-width:.6px;transition:fill 1.4s .2s}.sa-svg .sa-rod line{stroke:#c9d6e6;stroke-width:4px;stroke-linecap:round}.sa-svg .sa-side-liq{transition:fill 1.6s .3s}.sa-svg .tubing{fill:none;stroke:var(--glass);stroke-width:3px;opacity:.7}.sa-svg .mini-flame{fill:#5082ffbf}.sa-svg .burner-b{fill:#7d8796}.sa-svg .dropper{fill:#c8d2e199;stroke:var(--glass);stroke-width:1.4px}.sa-svg .drip{fill:#aac8ebe6;opacity:0}.sa-svg.dropping .sa-drop{display:inline}.sa-svg.dropping .drip{animation:.6s ease-in forwards drip}@keyframes drip{0%{opacity:1;transform:translateY(0)}to{opacity:0;transform:translateY(120px)}}.sa-svg.mode-flame .sa-tube,.sa-svg.mode-flame .sa-gas,.sa-svg.mode-flame .sa-drop{display:none}.sa-svg.mode-flame .sa-flame{transform-origin:130px 280px;animation:1.1s ease-in-out infinite alternate flick;display:inline}.sa-svg .big-flame{transition:fill .5s}.sa-svg .sa-flame .f-in{fill:#3c6effbf}.sa-svg .lbl{font-size:10.5px}.shelf{gap:10px}.tabs{border-bottom:1px solid var(--rule);scrollbar-width:none;gap:4px;display:flex;overflow-x:auto}.tabs button{font:600 14px/1.2 var(--ui);color:var(--ink-2);cursor:pointer;white-space:nowrap;background:0 0;border:0;border-bottom:2px solid #0000;padding:9px 10px}.tabs button[aria-selected=true]{color:var(--ink);border-bottom-color:var(--omr)}.tabpanel{gap:8px;max-height:520px;padding-right:2px;display:grid;overflow:auto}.tabpanel[hidden]{display:none}.tabpanel .ctrl-h{margin-top:6px}.reagents{grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:6px;display:grid}.reagents button{text-align:left;border:1px solid var(--rule);background:var(--sheet);color:var(--ink);border-radius:var(--r-s);font:500 13.5px/1.3 var(--ui);cursor:pointer;padding:9px 11px 9px 30px;position:relative}.reagents button:before{content:"";border:1.5px solid var(--ink-3);border-radius:50%;width:9px;height:9px;position:absolute;top:12px;left:11px}.reagents button:hover{border-color:var(--ink-3)}.reagents button.done:before{background:var(--ok);border-color:var(--ok)}.eq-box{background:var(--sheet);border:1px solid var(--rule);border-radius:var(--r-s);padding:10px 12px;font-size:14px}.eq-box b{text-transform:uppercase;letter-spacing:.06em;color:var(--ink-3);font-size:12.5px}.eq-box ul{font-family:var(--read);margin:6px 0 0;padding-left:18px;font-size:15.5px}.answer{border-top:1px solid var(--rule);gap:10px;padding:16px;display:grid}.answer label{color:var(--ink-2);gap:4px;font-size:13px;font-weight:600;display:grid}.answer .row{align-items:end}.verdict{min-height:1.2em;margin:0;font-weight:600}.verdict.ok{color:var(--ok)}.verdict.bad{color:var(--omr)}.ti-body{grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr)}.ti-svg{max-height:470px!important}.ti-svg .rod{stroke:var(--ink-3);stroke-width:4px;opacity:.6}.ti-svg .clamp{stroke:var(--ink-3);stroke-width:3px;opacity:.7}.ti-svg .ti-liq{fill:#b0cee899}.ti-svg .meniscus{fill:none;stroke:#466ea0e6;stroke-width:1.4px}.ti-svg .ticks line{stroke:var(--ink-2);stroke-width:.7px}.ti-svg .tick-l text{font:600 9px var(--ui);fill:var(--ink-2)}.ti-svg .stopcock{cursor:pointer}.ti-svg .cock-body{fill:#b9c4d2;stroke:var(--glass)}.ti-svg .cock-handle{fill:var(--omr);transform-origin:100px 300px;transition:transform .25s}.ti-svg .stopcock.open .cock-handle{transform:rotate(90deg)}.ti-svg .tip{fill:#b0cee840}.ti-svg .ti-drop{fill:#96bee6f2;opacity:0}.ti-svg .ti-drop.fall{animation:.32s ease-in tdrop}@keyframes tdrop{0%{opacity:1;transform:translateY(0)}to{opacity:.9;transform:translateY(46px)}}.ti-svg .ti-stream{fill:#96bee6d9;opacity:0}.ti-svg .ti-stream.on{opacity:1}.ti-svg .tile{fill:#fff;stroke:var(--rule)}.ti-svg .ti-fl-liq{transition:fill .5s}.ti-svg .ti-spot{opacity:0}.ti-svg .ti-spot.fade{animation:1.2s ease-out spot}@keyframes spot{0%{opacity:.95}to{opacity:0}}.ti-svg .flask{transform-origin:100px 414px}.ti-svg .flask.swirl{animation:.9s ease-in-out swirl}@keyframes swirl{0%,to{transform:rotate(0)}25%{transform:rotate(-5deg)}75%{transform:rotate(5deg)}}.ti-read{grid-template-columns:repeat(3,1fr);gap:8px;display:grid}.ti-read div{background:var(--sheet);border:1px solid var(--rule);border-radius:var(--r-s);padding:8px 10px}.ti-read span{color:var(--ink-3);font-size:11.5px;font-weight:600;display:block}.ti-read b{font-size:17px}.ti-chart{border:1px solid var(--rule);border-radius:var(--r-s);background:var(--sheet);margin:0;padding:8px}.ti-chart svg{width:100%;height:auto;max-height:300px;display:block}.ti-chart figcaption{color:var(--ink-3);padding:4px 4px 0;font-size:12.5px}.ti-chart .grid line{stroke:var(--rule-soft);stroke-width:1px}.ti-chart .grid line.mid{stroke:var(--rule);stroke-dasharray:3 3}.ti-chart .grid text,.ti-chart .ax{font:500 9.5px var(--ui);fill:var(--ink-3)}.ti-chart .band{fill:var(--omr-soft);opacity:.8}.ti-chart .curve{fill:none;stroke:var(--omr);stroke-width:2.2px;stroke-linejoin:round}.ti-chart .cur{fill:var(--omr);stroke:var(--sheet);stroke-width:1.5px}.ti-results{border-top:1px solid var(--rule);grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:16px;padding:16px;display:grid}.calc{background:var(--bench);border:1px solid var(--rule);border-radius:var(--r-s);padding:12px 14px;font-size:14.5px}.calc p{color:var(--ink-2);margin:6px 0 0}.calc .work{font-family:var(--read);color:var(--ink);font-size:16px;line-height:1.6}.calc .ok{color:var(--ok);font-weight:600}.calc .bad{color:var(--omr);font-weight:600}.lab-article ol,.lab-article ul{padding-left:22px}.lab-article li{margin:6px 0}.lab-article .tbl{margin:8px 0 16px}.lab-article .eqn{font-family:var(--read);background:var(--sheet);border:1px solid var(--rule);border-radius:var(--r-s);margin:10px 0;padding:10px 14px;font-size:16.5px;line-height:1.7;overflow-x:auto}.viva dt{margin-top:12px;font-weight:700}.viva dd{color:var(--ink-2);margin:4px 0 0}.lab-links{list-style:none;margin:0 0 10px!important;padding:0!important}.lab-links li{margin:0 0 10px!important}.lab-links a{font-weight:700;display:block}.lab-links small{color:var(--ink-3);font-size:13px;line-height:1.4;display:block}.subj-chips{flex-wrap:wrap;gap:8px;margin:0 0 22px;display:flex}.subj-chips span,.subj-chips a{border:1px solid var(--rule);background:var(--sheet);border-radius:999px;padding:6px 13px;font-size:14px;font-weight:600;text-decoration:none}.subj-chips .on{background:var(--ink);color:var(--paper);border-color:var(--ink)}.subj-chips .soon{color:var(--ink-3)}.lab-cards{grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:14px;margin-bottom:36px;display:grid}.lab-card{background:var(--sheet);border:1px solid var(--rule);border-radius:var(--r-m);flex-direction:column;text-decoration:none;display:flex;overflow:hidden}.lab-card:hover{border-color:var(--ink-3)}.lab-card .art{background:var(--bench);border-bottom:1px solid var(--rule);place-items:center;height:150px;display:grid}.lab-card .art svg{width:auto;height:120px}.lab-card .txt{gap:6px;padding:16px;display:grid}.lab-card b{font-size:19px}.lab-card p{color:var(--ink-2);margin:0;font-size:14.5px}.lab-card .pill{justify-self:start;margin-top:4px}@media (width<=860px){.lab-body,.sa-body,.ti-body{grid-template-columns:1fr}.lab-stage{border-right:0;border-bottom:1px solid var(--rule)}.ti-results{grid-template-columns:1fr}.tabpanel{max-height:none}}@media (width<=480px){.lab-bar{padding:10px}.lab-ctrl,.rec-wrap,.answer,.ti-results{padding:12px}.lab-stage{padding:10px}.seg button{padding:7px 10px;font-size:13.5px}.reagents{grid-template-columns:1fr}.ti-read b{font-size:15px}.sel-inline{flex:100%}.sel-inline select{flex:1}.rec{font-size:13px}}@media (prefers-reduced-motion:reduce){.ft-svg .wire,.sa-svg .sa-ppt{transition:none!important}.sa-svg.has-bub .sa-bub circle{opacity:1}.sa-svg.has-ppt .sa-ppt{transform:none}}.conf{border:1px solid var(--rule);border-radius:var(--r-s);gap:8px;padding:8px 10px;display:grid}.conf summary{cursor:pointer;font-size:14px;font-weight:600}.conf[open]{padding-bottom:10px}.conf .ctrl-h{margin-top:8px}.sa-svg{scroll-margin-top:140px}
