:root{--ink:#493754;--muted:#826e81;--blue:#864d71;--teal:#8b5b72;--paper:#fcf5e9;--line:#e6d6cc;--gold:#ab654d}body{background:var(--paper)}header{border-color:#ead9cb}.brand-mark{color:#b85e49}.hero h1 em{color:#b6634c}.hero-copy>p:first-child{color:#63435c}.eyebrow{color:#7c8053}.sequence-nav>a{display:flex;flex-direction:column;gap:3px;padding:14px 17px;border-radius:9px;background:#f1e5dc;border:1px solid #e7d5cb;text-decoration:none;font-size:12px;font-weight:650}.sequence-nav>a small{font-size:10px;font-weight:400}.sequence-nav>a.active{color:#fff7eb;background:#674562;border-color:#674562}.sequence-nav>button{background:#f0e6de}.seq6-tabs{grid-template-columns:repeat(5,minmax(0,1fr));background:#eee1d9}.work-tabs button[aria-selected=true]{background:#815474;color:#fffaf0}.primary{background:#955b74;color:#fffaf0;border-color:#955b74}.primary:hover{background:#74425c}.download-sheet{display:inline-block;text-decoration:none;padding:9px 13px;border-radius:8px;background:#f0e5d8;border:1px solid #d8bdb0;font-size:12px}.worksheet-task{background:#fff1c9;border-color:#d1af6b;border-left-color:#b77843}.worksheet-task h3{color:#624859}.written-example{background:#f3e7e8;border-color:#ba7d83}.written-example>strong{color:#7b455f}mark{background:#f8d968}.compare-experiments{display:grid;grid-template-columns:1fr 1fr;gap:22px}.experiment-card,.definition-card{padding:25px;background:#fffaf1;border:1px solid #e4d3c5;border-radius:19px}.experiment-card h3{font:26px Georgia,serif;margin:12px 0 20px}.experiment-card>svg{display:block;width:100%;height:210px;margin:15px 0 20px}.experiment-card>p{font-size:14px;min-height:48px}.category-tag{display:inline-block;font-size:10px;letter-spacing:1.5px;padding:6px 10px;border-radius:6px;font-weight:800}.logical{background:#eee0ed;color:#724c79}.analog{background:#f8e0ce;color:#9a523c}.output{background:#e7ebd4;color:#637040}.experiment-reading{margin:20px 0 15px;padding:14px 18px;border-radius:11px;background:#f2e7df;display:flex;flex-direction:column}.experiment-reading span{font-size:11px}.experiment-reading strong{font-size:38px;font-weight:500;margin:4px 0}.experiment-reading small{font-size:10px;color:#826e81}.experiment-card label{display:flex;justify-content:space-between;font-size:14px}.experiment-card input[type=range]{width:100%;accent-color:#ad6850}.mini-scope{padding:8px;border-radius:13px;background:#493754}.mini-scope svg{display:block;width:100%}.resource-grid,.definition-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:20px 0}.definition-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.resource-card{border:1px solid #dcc3b7;background:#fffaf1;border-radius:12px;padding:15px}.resource-card summary{cursor:pointer;font-weight:650}.resource-card img{display:block;width:100%;margin-top:15px}.definition-card h3{font:26px Georgia,serif}.definition-card>p{font-size:14px}.definition-card .written-example{font-size:13px;padding:15px}.digital-note{background:#f0ead9;padding:20px;border-radius:14px;margin:22px 0}.digital-note summary{cursor:pointer;font-weight:650}.label-workshop{display:grid;grid-template-columns:230px minmax(0,1fr);gap:24px;align-items:start}.name-bank{position:sticky;top:10px;background:#eee2dc;padding:18px;border-radius:14px}.name-bank h3{font-size:16px;margin-top:0}#s6NameBank{display:flex;flex-direction:column;gap:9px}#s6NameBank button{text-align:left;background:#fff8ed;border-color:#d5bdae;cursor:grab}#s6NameBank button[aria-pressed=true]{outline:3px solid #aa6959}#s6SelectedLabel{font-size:11px;line-height:1.8}.classification-grid{display:grid;grid-template-columns:1fr 1fr;gap:17px}.classification-card{border:1px solid #dfcdbf;background:#fffaf1;border-radius:14px;padding:18px;min-width:0}.classification-card figure{margin:0;background:#fff;display:grid;place-items:center;height:150px;border-radius:10px}.classification-card img{max-width:100%;max-height:138px;object-fit:contain}.classification-card figure svg{width:180px;height:120px}.classification-card>p{font-size:12px;min-height:55px}.classification-card .name-target{display:block;width:100%;min-height:46px;border-style:dashed;border-width:2px;border-color:#c39e8d;background:#f6ecdf;margin:12px 0;font-weight:650}.name-target.over{outline:3px solid #a26982}.classification-card label{display:block;font-size:12px}.classification-card select{width:100%;min-width:0;margin:7px 0}.classification-card.correct{border:2px solid #7c8d5b}.classification-card.incorrect{border:2px solid #c07b57}.classification-card .card-feedback{font-size:11px;min-height:20px}.quiz-progress{height:8px;border-radius:9px;background:#ead9cb;margin:20px 0}.quiz-progress>div{height:100%;width:0;background:#a76c58;border-radius:9px;transition:width .3s}.quiz-card{background:#fffaf1;border:1px solid #e0ccbd;border-radius:14px;padding:20px;margin:16px 0}.quiz-card h3{font-size:16px;margin:0 0 14px}.quiz-options{display:flex;gap:12px;flex-wrap:wrap;margin:12px 0}.quiz-options label{display:flex;align-items:center;gap:8px;font-size:13px;border:1px solid #e0cdbf;background:#f9efe1;border-radius:8px;padding:10px 13px}.quiz-options input{accent-color:#845473}.quiz-card p{font-size:13px}.quiz-card button{font-size:11px}.smoke-layout{display:grid;grid-template-columns:1.2fr 1fr;gap:25px}.smoke-scene{background:#fffaf1;border:1px solid #deccbc;border-radius:17px;padding:20px}.smoke-scene>svg{width:100%;display:block;margin-bottom:18px}.smoke-explanation{background:#f0e6dd;border-radius:17px;padding:23px}.smoke-state{background:#e9edd9;color:#59643b;border:1px solid #c1c9a5;border-radius:9px;padding:12px;font-weight:700}.smoke-state.alert{background:#f5d9cd;color:#923d37;border-color:#c58772}.smoke-explanation li{margin:12px 0;font-size:14px}.smoke-roles{grid-template-columns:1fr 1fr;margin-top:22px}.smoke-roles article{padding:15px;background:#fff9ef}.smoke-roles h3{font-size:19px}.smoke-roles p{font-size:12px}.buzzer-symbol{font-size:36px;line-height:1;opacity:.35;color:#9a5441;margin:20px}.buzzer-symbol.active{opacity:1}.smoke-blocks{margin-top:25px;padding:24px;border-radius:16px;background:#f1e7d6;border:1px solid #decaab}.smoke-blocks select{margin:7px;max-width:100%;background:#fffaf1}.smoke-particle{animation:float-particle 3s ease-in-out infinite}.smoke-particle:nth-child(2n){animation-delay:-1s}.light-travel{stroke-dasharray:20 6;animation:light-run 3s linear infinite}.seq6-paused .smoke-particle,.seq6-paused .light-travel{animation-play-state:paused}#contactLever{transform-origin:229px 124px;transition:transform .4s}#pressBlock{transition:transform .4s}@keyframes float-particle{0%,100%{transform:translateY(3px)}50%{transform:translateY(-7px)}}@keyframes light-run{to{stroke-dashoffset:-104}}button:focus-visible,select:focus-visible,input:focus-visible,a:focus-visible{outline:3px solid #a66b51;outline-offset:3px}.section-head .counter{background:#eee3d7;color:#826656}.svg-label{fill:#5c5661}.tiny{color:#85766f}.teacher{border-color:#ddc8b9}@media(max-width:1000px){.definition-grid{grid-template-columns:1fr}.smoke-layout{grid-template-columns:1fr}.label-workshop{grid-template-columns:1fr}.name-bank{position:static}#s6NameBank{flex-direction:row;flex-wrap:wrap}.classification-card>p{min-height:0}.seq6-tabs{grid-template-columns:repeat(3,minmax(0,1fr))}}@media(max-width:650px){.compare-experiments,.resource-grid,.classification-grid{grid-template-columns:1fr}.experiment-card,.definition-card{padding:18px}.seq6-tabs{grid-template-columns:repeat(2,minmax(0,1fr))}.hero-copy>p:first-child{font-size:18px}.smoke-blocks{padding:17px}.smoke-blocks select{display:block;margin:9px 0;width:100%}.experiment-card>p{min-height:0}.quiz-options{flex-direction:column}.smoke-roles{grid-template-columns:1fr}.experiment-card>svg{height:auto}}@media(prefers-reduced-motion:reduce){.smoke-particle,.light-travel{animation:none}.quiz-progress>div,#contactLever,#pressBlock{transition:none}}

.compare-experiments{grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.experiment-card{display:flex;flex-direction:column;min-width:0;padding:20px}.experiment-card .category-tag{align-self:flex-start}.experiment-card h3{font-size:24px;min-height:58px}.experiment-card .mini-scope{margin-top:auto}.humidity-actions{display:flex;gap:8px;flex-wrap:wrap}.humidity-actions button{font-size:12px;flex:1}.experiment-card>p{line-height:1.6}#soilDrops{transition:opacity .3s}@media(max-width:1000px){.compare-experiments{grid-template-columns:1fr}.experiment-card h3{min-height:0}.experiment-card>svg{height:220px}}
.classification-grid{grid-template-columns:repeat(3,minmax(0,1fr))}@media(max-width:1100px){.classification-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:650px){.classification-grid{grid-template-columns:1fr}}

.hero{position:relative;isolation:isolate}.signal-watermark{position:absolute;inset:0;width:100%;height:100%;color:#864d71;opacity:.1;pointer-events:none;z-index:-1}.hero>div{position:relative}