.matter-lab{margin-top:16px;padding:clamp(20px,3vw,32px);border:1px solid #b7cbc5;border-radius:18px;background:linear-gradient(145deg,#fffdf8,#e9f3ef);box-shadow:0 12px 28px rgba(38,74,69,.12)}.matter-lab h3{font:700 clamp(24px,3vw,32px)/1.15 'Fraunces',serif;margin:5px 0 8px}.matter-lab-copy>p:not(.eyebrow){max-width:850px;color:#526862;line-height:1.6}.science-vocab-row{display:grid;grid-template-columns:repeat(3,1fr);gap:9px;margin:18px 0}.science-vocab-row span{display:flex;flex-direction:column;padding:13px;border:1px solid #d0ddd9;border-radius:11px;background:#fff;font-size:12px;color:#60736d}.science-vocab-row b{margin-bottom:4px;color:var(--green);font-size:14px}.temperature-scene{padding:18px;border-radius:15px;background:#f8fcfb}.sky-track{position:relative;height:145px;overflow:hidden;border-radius:12px;background:linear-gradient(#8ed1f0,#e9f6f5 72%,#91bd72 73%)}.lab-sun{position:absolute;left:24%;bottom:46%;font-size:44px;filter:drop-shadow(0 5px 8px rgba(210,139,34,.35));transition:left .2s,bottom .2s}.horizon{position:absolute;inset:auto 0 0;height:38px;background:linear-gradient(10deg,#6d9b58,#a8cb77)}.temperature-scene>label{display:flex;justify-content:space-between;margin:14px 0 4px;font-weight:700}.temperature-scene>input{width:100%;accent-color:var(--orange)}.sample-buttons,.material-controls{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0}.sample-buttons button,.material-controls button,.object-picker button{padding:10px 13px;border:1px solid #b9cac5;border-radius:10px;background:#fff;color:var(--ink);font-weight:700;cursor:pointer;box-shadow:0 4px 9px rgba(38,74,69,.08)}.sample-buttons button[aria-pressed=true],.material-controls button[aria-pressed=true],.object-picker button[aria-pressed=true]{background:var(--green);color:#fff;border-color:var(--green)}.thermometer-readout{display:flex;align-items:center;justify-content:center;gap:28px;min-height:230px}.thermometer{position:relative;width:86px;height:200px}.thermometer-tube{position:absolute;left:35px;top:8px;width:17px;height:160px;border:4px solid #60736d;border-bottom:0;border-radius:12px 12px 0 0;background:#fff;overflow:hidden}.thermometer-tube span{position:absolute;left:3px;right:3px;bottom:0;min-height:4%;border-radius:5px 5px 0 0;background:#e35d4f;transition:height .08s}.thermometer-bulb{position:absolute;left:24px;bottom:5px;width:40px;height:40px;border:4px solid #60736d;border-radius:50%;background:#e35d4f}.thermometer-marks{position:absolute;left:0;top:7px;height:162px;display:flex;flex-direction:column;justify-content:space-between;font-size:9px;color:#60736d}.thermometer-marks i{font-style:normal}.thermometer-readout strong{font:700 40px 'Fraunces',serif;color:var(--green)}.thermometer-readout p{max-width:470px;line-height:1.55;color:#526862}.mass-workbench{display:grid;grid-template-columns:1fr 220px;gap:15px;align-items:stretch}.sample-bin{display:flex;align-content:flex-end;align-items:flex-end;justify-content:center;gap:4px;flex-wrap:wrap;min-height:170px;padding:20px;border:4px solid #8ba59e;border-top:0;border-radius:5px 5px 22px 22px;background:rgba(255,255,255,.62);overflow:hidden}.sample-bin span{font-size:27px}.sample-bin.iron span{color:#536765;text-shadow:1px 2px 0 #a6b3b0}.sample-bin.feathers span{font-size:32px}.digital-scale{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:18px;border-radius:14px;background:#173f39;color:#fff}.digital-scale span,.digital-scale small{color:#c7ddd7}.digital-scale strong{margin:9px 0;font:700 35px monospace;color:#e8c567}.equal-mass-demo{margin-top:18px;padding:18px;border-radius:14px;background:#fff}.equal-mass-demo h4{font:700 21px 'Fraunces',serif;margin:0}.equal-mass-demo>p{text-align:center;color:#526862}.balance-beam{display:grid;grid-template-columns:1fr 60px 1fr;align-items:end;max-width:680px;margin:18px auto}.balance-pan{display:flex;flex-direction:column;align-items:center;padding:14px;border-bottom:6px solid #657a74;background:#eef5f2;text-align:center}.balance-pan span{min-height:55px;font-size:22px}.balance-pan small{color:#667a74}.balance-center{position:relative;height:80px;border-top:7px solid #657a74}.balance-center span{display:block;width:0;height:0;margin:auto;border-left:28px solid transparent;border-right:28px solid transparent;border-bottom:70px solid #8da39d}.object-picker{display:grid;grid-template-columns:repeat(5,1fr);gap:9px;margin:18px 0}.object-picker button{display:flex;flex-direction:column;align-items:center;gap:4px;font-size:28px}.object-picker span{font-size:11px}.property-report{display:grid;grid-template-columns:1fr 1fr;gap:12px}.property-report>div{padding:18px;border-radius:13px;background:#fff}.property-report h4{font:700 25px 'Fraunces',serif;margin:3px 0 12px}.property-chips{display:flex;flex-wrap:wrap;gap:7px}.property-chips span{padding:7px 10px;border-radius:999px;background:#dcebe5;color:var(--green);font-size:12px;font-weight:700}.observation-check p{line-height:1.55}.observation-check small{color:#697c76}.classification-tip{margin-top:12px;padding:16px;border-left:5px solid var(--orange);border-radius:8px;background:#fff7ec;line-height:1.55}
.feathers-pan span{display:grid;place-items:center;min-height:74px;font-size:19px;line-height:1.65;letter-spacing:2px}.iron-pan span{display:grid;place-items:center;min-height:74px;font-size:38px;line-height:1}.model-scale-note{display:block;text-align:center;color:#71817d}
@media(max-width:700px){.science-vocab-row,.property-report{grid-template-columns:1fr}.mass-workbench{grid-template-columns:1fr}.object-picker{grid-template-columns:repeat(3,1fr)}.thermometer-readout{align-items:flex-start}.balance-beam{grid-template-columns:1fr 42px 1fr}.balance-pan{padding:8px;font-size:11px}.feathers-pan span{font-size:15px;letter-spacing:0}.iron-pan span{font-size:32px}}