/* v8 — original textbook ink and actual recordings from lueur.ai.kr. */
.experience{background:#e8ece6;padding-bottom:96px}.experience .section-heading h2{font-size:clamp(37px,4vw,58px);line-height:1.48}.experience-tabs{display:flex;gap:36px;margin:46px 0 50px;border-bottom:1px solid #cbd2c8}.experience-tabs button{min-height:60px;position:relative;font-size:13px;padding:14px 0 21px;color:#788278}.experience-tabs button span{font-size:9px;margin-right:12px;color:#8b968a}.experience-tabs button[aria-selected=true]{color:#283e34}.experience-tabs button[aria-selected=true]:after{content:'';height:2px;background:#455f4f;position:absolute;bottom:-1px;left:0;right:0}
.experience-layout{display:grid;grid-template-columns:.76fr 1.35fr;gap:76px;align-items:center}.experience-copy{padding-block:25px}.experience-kicker{font-size:9px;letter-spacing:.15em;color:#728171}.experience-copy h3{font:400 clamp(27px,2.55vw,37px)/1.55 MaruBuri,serif;letter-spacing:-.055em;margin:25px 0}.experience-copy>p:not(.experience-source){font-size:14px;line-height:1.95;color:#667466}.experience-point{display:flex;gap:12px;padding:22px 0;margin:27px 0 20px;border-top:1px solid #ccd5c8;border-bottom:1px solid #ccd5c8}.experience-point>span{color:#a38b5d;font-size:20px}.experience-point p{font-size:12px;line-height:1.9;color:#4b6350}.experience-primary{background:#30483b;color:#f8faf4;border-radius:50px;min-height:52px;padding:15px 22px;font-size:12px;display:flex;gap:35px;align-items:center;justify-content:space-between;min-width:210px;transition:background .2s,transform .2s}.experience-primary:hover{background:#43604e;transform:translateY(-2px)}.experience-primary span{font-size:18px}.experience-source{font-size:10px;color:#74826f;line-height:1.8;margin-top:26px}.experience-download{font-size:10px;display:inline-block;padding:12px 0;border-bottom:1px solid #aeb9a7;margin-top:6px}.evidence-choices{display:flex;gap:5px;flex-wrap:wrap;margin-top:18px}.evidence-choices button{min-height:44px;padding:10px 13px;font-size:10px;border-radius:24px;border:1px solid #bbc8b7;color:#5d715d}.evidence-choices button[aria-pressed=true]{background:#d9e1d3;border-color:#82977d;color:#294b33}
.experience-device{border:1px solid #fafbf6;background:#f4f3ed;border-radius:16px;box-shadow:0 35px 75px -40px #34463750,0 0 0 1px #d4d9cd;overflow:hidden;min-width:0}.experience-device-top{display:flex;align-items:center;gap:22px;padding:16px 21px;border-bottom:1px solid #dcdfd4;font-size:9px;color:#737d6d}.experience-badge{margin-left:auto;font-size:7px;letter-spacing:.09em;color:#87917e}.experience-stage{height:680px;background:linear-gradient(130deg,#dedfd6,#f1efe7);padding:24px;display:grid;place-items:center;overflow:hidden;grid-template-columns:minmax(0,1fr);grid-template-rows:minmax(0,1fr)}.experience-scene{height:100%;width:100%;position:relative;display:flex;justify-content:center;align-items:center;min-width:0;min-height:0;max-height:100%}.study-paper,.lecture-page{height:100%;position:relative;aspect-ratio:1075/1521;max-width:100%;background:#fff;box-shadow:0 8px 24px #4a503c1a;overflow:hidden}.study-layers{width:100%;height:100%;position:relative;transform-origin:0 0;transition:transform .7s cubic-bezier(.22,.61,.36,1)}.study-layers>img,.lecture-page>img{width:100%;height:100%;object-fit:fill}.study-layers>.actual-ink,.lecture-page>.actual-ink{position:absolute;inset:0}.study-paper.focus-area .study-layers{transform:translate(-100%,-90%) scale(2)}.study-paper.focus-limit{aspect-ratio:1075/600;height:auto;width:100%}.study-paper.focus-limit .study-layers{height:253.5%;transform:translateY(-5.3%)}.lecture-page>.actual-ink{transition:opacity .3s}.lecture-page>.actual-ink.off{opacity:0}.experience-device-foot{display:flex;justify-content:space-between;align-items:center;gap:12px;min-height:56px;padding:6px 19px;font-size:9px;color:#7f8776}.experience-device-foot button{min-height:44px;font-size:10px;white-space:nowrap;color:#52654c}
.experience-layout[data-mode=hint]{grid-template-columns:1fr;gap:30px}.experience-layout[data-mode=hint] .experience-copy{display:grid;grid-template-columns:1fr 1fr;column-gap:70px;padding:0}.experience-layout[data-mode=hint] .experience-kicker{grid-column:1}.experience-layout[data-mode=hint] .experience-copy h3{grid-column:1;grid-row:2/5;margin:18px 0 0;font-size:clamp(29px,3.3vw,44px)}.experience-layout[data-mode=hint] #experience-description{grid-column:2;grid-row:1/3;padding-top:5px}.experience-layout[data-mode=hint] .experience-point{display:none}.experience-layout[data-mode=hint] .experience-primary{grid-column:2;grid-row:3;justify-self:start;margin-top:20px}.experience-layout[data-mode=hint] .evidence-choices{grid-column:1;grid-row:5}.experience-layout[data-mode=hint] .experience-source{grid-column:2;grid-row:4;margin-top:15px}.experience-layout[data-mode=hint] .experience-download{grid-column:2;grid-row:5;justify-self:start}.experience-layout[data-mode=hint] .experience-stage{height:auto;aspect-ratio:1364/936;padding:0;background:#f7f6ef}.experience-scene video{width:100%;height:100%;max-width:100%;max-height:100%;object-fit:contain;background:#f7f6ef}.experience-scene video:fullscreen{object-fit:contain;background:#10140f}.recording-play{position:absolute;left:50%;top:68%;transform:translate(-50%,-50%);display:grid;justify-items:center;gap:10px;background:#304438f2;backdrop-filter:blur(8px);padding:24px 28px;color:#fff;border-radius:12px;box-shadow:0 14px 35px #26382833;font-size:13px;min-width:320px}.recording-play>span{font-size:24px;border:1px solid #a9b6a06b;width:48px;height:48px;border-radius:50%;display:grid;place-items:center;padding-left:4px}.recording-play b{font-weight:400}.recording-play small{font-size:10px;opacity:.7;font-weight:400}
.experience-outcomes{margin-top:65px;border-top:1px solid #cbd3c6;padding-top:35px;display:grid;grid-template-columns:repeat(3,1fr);gap:35px}.experience-outcomes article{padding-right:25px}.experience-outcomes article+article{border-left:1px solid #cbd3c6;padding-left:35px}.experience-outcomes span{font-size:8px;letter-spacing:.14em;color:#86917e}.experience-outcomes h3{font:400 18px/1.6 MaruBuri,serif;letter-spacing:-.04em;margin-top:12px}.experience-outcomes p{font-size:12px;color:#7a8673;line-height:1.9;margin-top:12px}
@media(max-width:1100px){.experience-layout{gap:35px;grid-template-columns:.8fr 1.2fr}.experience-stage{height:590px;padding:18px}.experience-device-top{gap:14px;padding:14px}.experience-badge{font-size:6px}.experience-copy h3{font-size:28px}}
@media(max-width:800px){.experience{padding-bottom:65px}.experience-tabs{gap:20px;margin:28px 0}.experience-tabs button{font-size:11px;flex:1;text-align:left;padding:12px 0 18px;line-height:1.6}.experience-tabs button span{display:block;font-size:8px;margin-bottom:6px}.experience-layout{display:flex;flex-direction:column;gap:24px;align-items:stretch}.experience-copy{padding:0}.experience-copy h3{font-size:29px;margin:18px 0}.experience-copy>p:not(.experience-source){font-size:13px}.experience-point{margin:18px 0;padding:16px 0}.experience-point p{font-size:11px}.experience-primary{display:inline-flex;min-width:210px}.experience-source{font-size:9px;margin-top:14px}.experience-download{font-size:9px;padding:8px 0}.experience-device{border-radius:12px}.experience-stage{height:620px;padding:17px}.experience-badge{display:none}.experience-device-top{font-size:8px;justify-content:space-between}.experience-device-foot{font-size:8px;padding:5px 12px;gap:8px}.experience-device-foot button{font-size:9px}.experience-layout[data-mode=hint] .experience-copy{display:block}.experience-layout[data-mode=hint] .experience-copy h3{font-size:29px;margin:18px 0}.experience-layout[data-mode=hint] .experience-stage{aspect-ratio:1364/936}.experience-layout[data-mode=hint] .experience-primary{margin-top:18px}.recording-play{min-width:0;width:76%;gap:6px;padding:15px;top:67%;font-size:10px}.recording-play>span{font-size:17px;width:30px;height:30px}.recording-play small{font-size:8px}.experience-outcomes{grid-template-columns:1fr;margin-top:40px;gap:20px;padding-top:25px}.experience-outcomes article{padding:0}.experience-outcomes article+article{border-left:0;border-top:1px solid #cbd3c6;padding:20px 0 0}.experience-outcomes h3{font-size:17px;margin-top:8px}.experience-outcomes p{font-size:11px;margin-top:8px}.experience-outcomes p br{display:none}body.in-experience .chapter-dock{opacity:0;visibility:hidden;pointer-events:none}}
@media(max-width:480px){.experience-stage{height:500px;padding:12px}.experience-tabs{gap:14px}.experience-tabs button{font-size:10px}.experience-copy h3{font-size:27px}.experience-device-foot{flex-wrap:wrap;gap:0;padding-top:8px}.experience-device-foot>span{flex:1;min-width:160px;line-height:1.6}.recording-play{padding:10px}.recording-play small{display:none}.evidence-choices button{font-size:9px;padding:9px 11px}}
@media(prefers-reduced-motion:reduce){.experience-primary,.study-layers,.lecture-page>.actual-ink{transition:none}}
.experience-layout[data-mode=hint] .experience-device{width:100%;max-width:1000px;margin-inline:auto}
body.in-experience .chapter-dock{opacity:0;visibility:hidden;pointer-events:none}