.activity{display:grid;grid-template-columns:minmax(0,1fr) minmax(260px,310px);gap:22px;align-items:start;color:#193e51}
.activity-scene{position:relative;min-height:460px;padding:22px;border:1px solid #d2e5dd;border-radius:26px;background:linear-gradient(180deg,#fffdf4e8,#e9f2e9f2);box-shadow:0 8px 22px #193f5b12;overflow:hidden}
.activity-tools{padding:20px;border-radius:22px;background:#fffdf5ed;border:1px solid #e8dcc5;display:flex;flex-direction:column;gap:12px;box-shadow:0 7px 20px #193f5b0c}
.activity-tools h3{font-size:21px;line-height:1.45;margin:0;color:#244d5c;word-break:keep-all}.activity-tools p{margin:0;font-size:15px;line-height:1.65;word-break:keep-all}
.activity-stage-caption{font-weight:800;font-size:15px;line-height:1.5;text-align:center;color:#456476;background:#ffffffe6;border-radius:12px;padding:10px 14px;margin-bottom:16px}
.activity-button{font:inherit;font-weight:750;font-size:15px;min-height:48px;border:1px solid #adc8cd;border-radius:14px;background:#fff;color:#204d61;padding:11px 15px;cursor:pointer;line-height:1.45;transition:background .15s,box-shadow .15s;word-break:keep-all}
.activity-button:hover:not(:disabled){background:#edf8f6;box-shadow:0 3px 0 #bfd5cf}.activity-button:disabled{opacity:.45;cursor:not-allowed}.activity-primary{background:#247d78;color:white;border-color:#247d78;box-shadow:0 4px 0 #155c5b}.activity-primary:hover:not(:disabled){background:#1b6b67;color:#fff}
.activity :focus-visible{outline:3px solid #ee9b2d;outline-offset:4px}.activity-two{display:flex;gap:8px;flex-wrap:wrap}.activity-two>*{flex:1;min-width:100px}
.activity-status{padding:12px;background:#e6f3ed;border-radius:12px;border-left:4px solid #358a79;font-weight:650;line-height:1.65;font-size:15px;word-break:keep-all}.activity-science{font-size:12px!important;color:#5a6a6e;line-height:1.6!important;padding-top:10px;border-top:1px dashed #cfd8cb}
.activity-alternative{border-top:1px solid #d9dfd0;padding-top:8px;font-size:13px;color:#667878}.activity-alternative summary{cursor:pointer;min-height:38px;display:flex;align-items:center;gap:8px}.activity-alternative summary:before{content:'＋';font-size:18px}.activity-alternative[open] summary:before{content:'−'}.activity-alternative>div{display:grid;gap:8px}.activity-alternative .activity-button{font-size:13px}
.activity-prop{display:block;width:145px;height:145px;max-width:100%;margin:auto}.activity-fallback{display:grid;place-items:center;width:120px;height:120px;margin:auto;color:#4fa8bf;font-size:90px;line-height:1;background:#d8f0ef;border-radius:22px}.activity-ghost{opacity:.3}
.activity-object{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;border:2px solid #e3cf9b;border-radius:20px;background:#fffcf2;padding:10px;color:#285065;font:inherit;font-size:14px;font-weight:750;min-height:60px;min-width:100px;touch-action:none;cursor:grab;box-shadow:0 5px 0 #d7c5a050;z-index:2;user-select:none}.activity-object>span:last-child{display:block;max-width:190px;line-height:1.55;word-break:keep-all}.activity-object>small{font-size:11px;color:#698577}.activity-object:active{cursor:grabbing}.activity-dragging{z-index:40!important;box-shadow:0 12px 30px #193e5140!important;pointer-events:none}.activity-target{border:2px dashed #a7c9bf;border-radius:22px;padding:15px;min-width:80px;min-height:90px;background:#eff8f1b5;cursor:pointer;text-align:center;transition:background .15s}.activity-target:hover{background:#d6f0df}.activity-target h3{margin:0 0 8px;font-size:18px}.activity-target p{font-size:13px;margin:6px 0;line-height:1.5}.activity-target b{display:block;font-size:15px;line-height:1.5}.activity-check{display:block;font-size:12px;color:#23775b;font-weight:800;margin-top:8px}
.activity-range{display:grid;grid-template-columns:1fr auto;gap:10px;align-items:center;font-size:14px;font-weight:700;line-height:1.5;padding:6px 0}.activity-range output{background:#e0eeea;border-radius:8px;padding:3px 8px;min-width:34px;text-align:center;color:#205e69}.activity-range input{grid-column:1/-1;width:100%;min-height:34px;accent-color:#26887e;touch-action:pan-y;cursor:pointer;margin:0}
.activity-records{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}.activity-record{flex:1;min-width:110px;max-width:230px;background:#fffef7;border:1px solid #d7ddc8;border-radius:12px;padding:10px;margin:0;box-shadow:0 4px 0 #aeb3a010;transform:rotate(-1deg)}.activity-record:nth-child(even){transform:rotate(1deg)}.activity-record>div{display:flex;flex-direction:column;gap:5px;justify-content:center;min-height:54px;font-size:14px}.activity-record small{font-size:12px;color:#5e7780}.activity-record figcaption{font-size:12px;font-weight:800;color:#557666;padding-top:8px;border-top:1px solid #e2e8d7;margin-top:5px}
.activity-pour{display:flex;gap:18px;align-items:center;padding:20px 0;min-height:310px}.activity-pour>.activity-object{width:30%;flex-shrink:0}.activity-vessels{display:flex;align-items:end;gap:12px;flex:1}.activity-vessels>.activity-target{flex:1;min-width:0;padding:8px}.activity-vessel .beaker{width:100%;height:220px;max-height:220px;display:block}.activity-vessel.wide .beaker{transform:scaleX(1.2) scaleY(.74);transform-origin:bottom}.activity-vessel.tall .beaker{transform:scaleX(.8)}
.activity-ice-play{display:flex;align-items:center;justify-content:space-around;gap:25px;min-height:300px}.activity-original{display:flex;flex-direction:column;align-items:center;gap:12px}.activity-ice-play>.activity-target{width:45%;min-height:180px;display:grid;place-items:center}.activity-dish{display:grid;place-items:center;border:7px solid #b2cad1;border-radius:50%;min-width:150px;height:110px;background:#f7feff;color:#708d98}
.activity-cloth{position:relative;display:grid;place-items:center;width:min(100%,460px);min-height:280px;margin:0 auto;touch-action:none;cursor:crosshair;user-select:none}.activity-cloth>.activity-prop{width:280px;height:250px}.activity-cloth>b{position:relative;z-index:3;background:#fffef4ed;border-radius:12px;padding:10px;font-size:15px}.activity-wet{position:absolute;top:22%;left:25%;width:48%;height:45%;background:#308cc480;border-radius:45% 55% 40% 60%;pointer-events:none;mix-blend-mode:multiply;transition:opacity .1s}
.activity-cardbank{display:flex;gap:12px;align-items:stretch;justify-content:center;min-height:200px;margin:10px 0 25px}.activity-cardbank>.activity-object{width:30%;min-width:0}.activity-cardbank .activity-prop{width:115px;height:115px}.activity-sort-bins{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.activity-sort-bins .activity-target{min-height:170px;padding:13px 8px}.activity-sorted{display:block;padding:8px 4px;font-size:12px;line-height:1.5;color:#327151;font-weight:800}.activity-all-found{display:grid;place-items:center;min-height:190px;color:#33755e;font-size:22px;font-weight:850}
.activity-freeze-rig{display:flex;align-items:center;justify-content:center;gap:24px;min-height:330px}.activity-freeze-rig>.activity-target{padding:10px;width:60%;max-width:310px}.activity-measure-cup>.beaker{width:190px;height:230px;max-width:100%}.activity-scale{background:#344e5b;color:white;border:5px solid #b9cace;border-radius:16px;padding:8px;display:flex;flex-direction:column;gap:3px}.activity-scale b{font-size:25px;font-variant-numeric:tabular-nums}.activity-scale span,.activity-scale small{font-size:11px;color:#e7f8e9}.activity-tool-tray{display:flex;flex-direction:column;gap:12px;width:34%;max-width:175px}.activity-tool-tray .activity-object{padding:7px;font-size:12px}.activity-tool-tray .activity-prop{width:90px;height:90px}.activity-before-scale{display:flex;align-items:center;gap:15px}.activity-before-scale .beaker{height:180px;width:150px}.activity-empty-scale{background:#d3e2df;padding:40px 12px;border-radius:15px;line-height:2;font-size:18px}
.activity-pipe-test{display:flex;justify-content:space-around;align-items:center;gap:25px;padding:10px 30px;min-height:310px}.activity-pipe-tank{position:relative;width:150px;height:250px;border:8px solid #77929b;border-top:0;border-radius:8px 8px 24px 24px;background:#f8fdff;overflow:hidden;touch-action:none;cursor:ns-resize;display:flex;flex-direction:column;justify-content:center;align-items:center;box-shadow:inset 0 0 15px #294e5710}.activity-pipe-fill{position:absolute;bottom:0;left:0;right:0;background:#64c6df;border-top:4px solid #a5e9f0}.activity-pipe-tank>b,.activity-pipe-tank>span{position:relative;z-index:1;background:#ffffffd9;padding:7px;border-radius:8px}.activity-pipe-tank>b{font-size:27px}.activity-pipe-tank>span{font-size:11px;max-width:100px;text-align:center;margin-top:10px}.activity-test-result{width:55%;text-align:center}.activity-test-result h3{margin:0 0 10px}.activity-test-result p{font-size:12px;line-height:1.5}.activity-pipe-cross{position:relative;overflow:hidden;height:205px;width:160px;margin:auto;border:8px solid #778e9b;border-radius:20px;background:#f8fdf7}.activity-pipe-cross>div{position:absolute;bottom:0;left:0;right:0;background:repeating-linear-gradient(135deg,#a5d5e6 0 23px,#d2ecf4 24px 27px);border-top:3px solid #e8faff}.activity-pipe-cross.tight{border-color:#b87a63}.activity-space-marker{position:relative;z-index:2;padding:7px;border:1px solid #acbca6;border-radius:8px;background:#ffffffe8;color:#385646;min-height:48px;font:inherit;font-size:12px;font-weight:bold;cursor:pointer;max-width:100%}.activity-empty-result{padding:40px 10px;font-weight:800;color:#6e8e91;line-height:1.8}.activity-trials{display:flex;gap:9px;overflow:auto;padding:8px 2px}.activity-trial{display:flex;flex-direction:column;gap:7px;min-width:120px;min-height:120px;border:2px solid #d5d9c4;border-radius:14px;padding:12px;background:#fffdf4;cursor:pointer;font:inherit;font-size:12px;color:#355869}.activity-trial b{font-size:17px}.activity-trial.selected{border-color:#408d6b;background:#e4f4e5;box-shadow:0 0 0 2px #408d6b25}
.activity-drawing-pair{display:grid;grid-template-columns:1fr 1fr;gap:16px}.activity-drawing-pair h3{font-size:15px;margin:0 0 10px;text-align:center}.activity-drawing-pair canvas{display:block;width:100%;aspect-ratio:500/310;background:#e1d7bc;border:7px solid #c1a47b;border-radius:16px;box-shadow:inset 0 2px 9px #7a614529;touch-action:none;cursor:crosshair}.activity-air-target{margin-top:5px;background:linear-gradient(180deg,#eff9ff,#dceff5);padding:14px;border-color:#97bdcb}.activity-air-target:after{content:'공기 · 눈에 보이지 않는 수증기';display:block;font-size:12px;line-height:1.6;padding-top:15px;font-weight:800;color:#4b768a}.activity-air-target .activity-object{max-width:160px;margin:auto}.activity-air-target .activity-prop{width:72px;height:72px}.activity-air-target .activity-object>span{font-size:12px}
.activity-heating-pair{display:grid;grid-template-columns:1fr 1fr;gap:20px;text-align:center}.activity-heating-pair h3{font-size:15px;margin:0 0 12px}.activity-heating-pair>.activity-target{min-width:0}.activity-heating-pair .activity-target{padding:0;border-width:1px;background:#ffffff40}.activity-heating-pair .beaker{width:100%;height:225px}.activity-heating-pair p{margin:10px;font-size:14px;font-weight:bold}.activity-heater{display:block;background:#a7b7ad;color:#fff;border-radius:9px;padding:8px;font-size:12px}.activity-heater.on{background:#b57551}.activity-observation-tools{display:flex;justify-content:center;gap:15px;align-items:center;margin-top:15px}.activity-observation-tools>.activity-object{flex-direction:row;max-width:280px;font-size:12px}.activity-observation-tools .activity-prop{width:80px;height:80px;flex-shrink:0}.activity-observation-tools .activity-target{min-height:75px;display:grid;place-items:center}
.activity-dew-pair{display:grid;grid-template-columns:1fr 1fr;gap:24px;text-align:center}.activity-dew-pair h3{font-size:15px;margin:8px 0}.activity-dew-pair p{font-size:13px;font-weight:700;min-height:38px}.activity-wipe-cup{position:relative;touch-action:none;cursor:crosshair;max-width:220px;margin:auto;user-select:none}.activity-wipe-cup .can-art{width:100%;height:255px}.activity-seal{position:absolute;top:6%;left:23%;right:23%;padding:5px 2px;background:#e6cd8e;border:1px dashed #998453;color:#62532d;font-size:10px;font-weight:800;border-radius:5px;transform:rotate(-5deg)}
.activity-evidence-bank{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-bottom:18px}.activity-evidence-bank .activity-object{min-width:0;padding:10px 6px;font-size:12px}.activity-evidence-bank .activity-prop{width:85px;height:85px}.activity-evidence-bank small{font-size:10px}.activity-chain{display:flex;gap:7px;align-items:center;margin-top:20px}.activity-chain .activity-target{flex:1;min-width:0;padding:12px 8px;min-height:100px;display:flex;flex-direction:column;justify-content:center;gap:9px}.activity-chain small{font-size:10px;color:#708279}.activity-chain b{font-size:14px}.activity-chain-bank{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin-top:15px}.activity-chain-bank .activity-object{font-size:12px;padding:12px}.activity-chain-bank .activity-object>span{display:none}.activity-transfer{padding:12px;border-radius:15px;background:#eff7f1;text-align:center}.activity-transfer>b{font-size:14px}.activity-transfer .activity-wipe-cup{width:100px}.activity-transfer .can-art{height:125px}.activity-transfer .activity-range{font-size:12px}.activity-transfer .activity-button{width:100%}
@media(min-width:1600px){.activity{grid-template-columns:minmax(0,1fr) 350px}.activity-scene{min-height:530px;padding:28px}.activity-tools{padding:24px;gap:16px}.activity-tools p{font-size:17px}.activity-tools h3{font-size:24px}.activity-stage-caption{font-size:17px}.activity-pour,.activity-ice-play{min-height:350px}.activity-cloth{min-height:330px}.activity-cardbank{min-height:235px}.activity-heating-pair .beaker{height:270px}}
@media(max-width:1050px){.activity{grid-template-columns:minmax(0,1fr) 265px;gap:14px}.activity-scene{padding:15px;min-height:430px}.activity-tools{padding:15px;gap:10px}.activity-tools h3{font-size:19px}.activity-tools p{font-size:14px}.activity-object{font-size:12px;min-width:80px}.activity-prop{width:110px;height:110px}.activity-vessel .beaker{height:180px}.activity-pour{gap:10px}.activity-sort-bins{gap:7px}.activity-sort-bins h3{font-size:15px}.activity-sort-bins p{font-size:11px}.activity-freeze-rig{gap:12px}.activity-pipe-test{padding:10px 0}.activity-pipe-tank{width:120px}.activity-pipe-cross{width:125px}.activity-cardbank .activity-prop{width:85px;height:85px}.activity-chain b{font-size:12px}.activity-drawing-pair{gap:8px}}
@media(max-width:760px){.activity{grid-template-columns:1fr}.activity-scene{min-height:350px;padding:14px}.activity-tools{padding:17px}.activity-tools h3{font-size:21px}.activity-tools p{font-size:15px}.activity-pour{min-height:240px}.activity-ice-play{min-height:230px}.activity-cardbank{min-height:180px}.activity-drawing-pair canvas{border-width:4px}.activity-dew-pair{gap:12px}.activity-wipe-cup .can-art{height:210px}.activity-transfer .can-art{height:125px}.activity-chain b{font-size:13px}.activity-cardbank .activity-object>span{font-size:11px}.activity-sort-bins .activity-target{min-height:180px}.activity-stage-caption{font-size:13px}.activity-tool-tray .activity-prop{width:80px;height:80px}.activity-observation-tools>.activity-object{max-width:210px}.activity-object{min-height:48px}.activity-cloth{min-height:240px}.activity-cloth>.activity-prop{height:210px;width:250px}}
@media(prefers-reduced-motion:reduce){.activity *{transition:none!important;animation:none!important}}

.activity-evidence-bank.evidence-linked .activity-prop{width:36px;height:36px}.activity-evidence-bank.evidence-linked .activity-object{padding:6px;font-size:12px}.activity-evidence-bank.evidence-linked small{display:none}.activity-8 [data-activity-drop="proof-board"]{min-height:75px;padding:10px}.activity-8 [data-activity-drop="proof-board"] h3{font-size:16px;margin-bottom:4px}.activity-8 [data-activity-drop="proof-board"] p{margin:3px 0}.activity-8 .activity-chain{margin-top:12px}.activity-8 .activity-chain .activity-target{min-height:85px}.activity-chain-bank .activity-object{min-height:48px}.activity-tools p,.activity-button,.activity-status{font-size:16px}.activity-stage-caption{font-size:16px}