@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@400;500;600;700&family=Noto+Serif+KR:wght@400;500;600&display=swap');
:root{--paper:#f7f5ed;--ink:#244a3f;--muted:#687268;--line:#dddcd1;--gold:#a58a51;--serif:'Noto Serif KR',Georgia,serif}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:110px}body{margin:0;background:var(--paper);color:var(--ink);font:14px/1.8 'Noto Sans KR',sans-serif}a{color:inherit;text-decoration:none}button{font:inherit}a:focus-visible,button:focus-visible{outline:3px solid var(--gold);outline-offset:5px}a:hover{color:#80683a}.skip{position:fixed;top:-100px;left:16px;padding:12px;background:white;z-index:100}.skip:focus{top:10px}.site-header{position:sticky;top:0;z-index:20;background:#f7f5edf5;border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}.header-inner{max-width:1480px;margin:auto;padding:20px 4%;display:flex;align-items:center;gap:24px}.brand{display:flex;align-items:center;gap:10px;white-space:nowrap;font-size:25px;font-weight:500;letter-spacing:-1px}.brand svg{width:37px;height:37px}.motto{font-size:11px;color:var(--muted);padding-left:20px;border-left:1px solid var(--line)}#site-nav{display:flex;gap:23px;margin-left:auto;align-items:center}#site-nav a{font-size:12px;white-space:nowrap}#site-nav em{font-style:normal;font-family:var(--serif)}.menu-toggle{display:none}.hero{max-width:1600px;margin:auto;min-height:590px;display:grid;grid-template-columns:48% 52%;position:relative}.hero-copy{padding:78px 7% 60px 12%;position:relative;z-index:1}.eyebrow{font-size:10px;font-weight:600;letter-spacing:2.2px;color:#827b5e;margin:0 0 18px}h1,h2,h3{font-family:var(--serif);font-weight:500;letter-spacing:-1.3px;word-break:keep-all}h1{font-size:clamp(36px,3.9vw,62px);line-height:1.5;margin:0 0 24px}h1 em{font-style:normal;color:#917440}.hero-intro{color:#626b61;font-size:15px;line-height:2.1}.hero-actions{display:flex;gap:23px;align-items:center;margin-top:32px;flex-wrap:wrap}.button{display:inline-flex;align-items:center;justify-content:space-between;gap:28px;padding:14px 23px;background:var(--ink);color:#fffdf6;border-radius:7px;font-size:13px}.button:hover{background:#355f4c;color:white}.text-link{font-size:12px;border-bottom:1px solid #aca98d;padding:7px 0}.hero-note{font-size:11px;color:#7c8171;letter-spacing:1px;margin-top:42px}.hero-art{background:url('library.png') 67% center/cover;position:relative;border-radius:0 0 0 100px}.hero-art:before{content:'';position:absolute;inset:0;background:linear-gradient(90deg,#f7f5edb0,transparent 28%)}.art-caption{position:absolute;bottom:30px;right:30px;font-size:11px;color:white;text-shadow:0 1px 8px #000}.gateways{max-width:1310px;padding:0 40px;margin:36px auto 0;display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.gateways>a{position:relative;padding:29px 30px;border-radius:16px;border:1px solid var(--line);background:#eeeee4;transition:transform .2s,background .2s}.gateways>a:nth-child(2){background:#ece9df}.gateways>a:nth-child(3){background:#e7ebe3}.gateways>a:hover{transform:translateY(-4px);background:#e1e6db}.gateways .eyebrow{font-size:9px}.gateways h2{font-size:25px;line-height:1.5;margin:10px 0 17px}.gateways p{font-size:12px;margin:0}.arrow{position:absolute;right:27px;bottom:25px;font-size:24px}.content{max-width:1310px;padding:0 40px;margin:auto}.collection-intro{display:flex;justify-content:space-between;align-items:end;padding-top:82px;margin-bottom:27px}.collection-intro h2{font-size:34px;margin:0}.collection-intro>p{font-size:13px;color:var(--muted)}.category-nav{display:flex;border-top:1px solid var(--line);border-bottom:1px solid var(--line);gap:38px;padding:16px 0}.category-nav a{font-size:13px}.category-nav span{color:#999b88;margin-left:14px}.collection{padding-top:65px;scroll-margin-top:15px}.section-heading{display:flex;justify-content:space-between;align-items:end;margin-bottom:25px}.section-heading .eyebrow{font-size:9px;margin-bottom:8px}.section-heading h2{font-size:32px;margin:0}.section-heading>p{font-size:12px;color:var(--muted);margin:0}.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:23px}.volume-card{display:flex;flex-direction:column;min-width:0;border:1px solid var(--line);border-radius:18px;overflow:hidden;background:#fffdf7;transition:transform .2s,box-shadow .2s}.volume-card:hover{color:var(--ink);transform:translateY(-4px);box-shadow:0 12px 26px #244a3f12}.volume-art{height:210px;background:#304b3c;overflow:hidden;display:flex;align-items:center;justify-content:center;position:relative;color:#ebdfbc}.volume-art img{width:100%;height:100%;object-fit:cover}.tm-art-slide:not(.is-active),.museum-slide:not(.is-active),.einstein-orbit{display:none}.museum-slide.is-active{display:flex;width:100%;height:100%}.museum-slide img{width:50%;object-position:center 30%}.volume-seal{font-family:var(--serif);font-size:33px;letter-spacing:2px;text-align:center;line-height:1.3;border:1px solid #e4d7ac66;padding:22px;width:85%;border-radius:90px 90px 4px 4px}.volume-seal em{display:block;font-size:18px;font-style:normal}.principia .volume-art{background:#344d55}.samgukji .volume-art{background:#604238}.seolwon .volume-art{background:#6d6d50}.aiwalk .volume-art{background:#405552}.democracy .volume-art{background:#465e63}.semiconductors .volume-art{background:#3e485c}.maestros .volume-art{background:#53453d}.volume-body{padding:25px 25px 20px;flex:1}.volume-eyebrow{font-size:10px!important;color:#8a7955!important;margin:0 0 9px!important}.volume-body h2{font-size:24px;line-height:1.5;margin:0 0 15px}.volume-body h2 em{display:block;font-size:13px;color:#8d8774;font-weight:400;font-style:normal;margin-top:5px;letter-spacing:0}.volume-body>p{font-size:12px;line-height:1.9;color:var(--muted);margin:0 0 12px;word-break:keep-all}.volume-stats{display:flex;flex-wrap:wrap;gap:12px;border-top:1px solid #e8e5da;padding-top:16px;margin-top:21px}.volume-stats>div{flex:1;min-width:60px}.volume-stats strong{display:block;font:19px var(--serif)}.volume-stats span{font-size:9px;color:var(--muted)}.card-end{display:flex;justify-content:space-between;font-size:11px;padding:15px 25px;border-top:1px solid #e8e5da}.card-end>span{font-size:18px}.invitation{margin-top:75px;background:#e9ecdf;border:1px solid #d7ddcb;border-radius:20px;padding:40px 45px;display:flex;justify-content:space-between;align-items:center;gap:24px}.invitation h2{font-size:32px;line-height:1.5;margin:10px 0 18px}.invitation p{font-size:12px;color:var(--muted)}.philosophy{text-align:center;padding:85px 15px 60px}.philosophy h2{font-size:32px;line-height:1.6;margin:16px 0 23px}.philosophy>p{font-size:13px;color:var(--muted)}.philosophy .rights{font-size:10px;line-height:1.9;margin-top:35px}footer{max-width:1310px;margin:auto;border-top:1px solid var(--line);display:flex;gap:25px;align-items:center;padding:30px 40px 40px}footer p,footer small,footer>a:last-child{font-size:11px;color:var(--muted)}footer small{margin-left:auto}footer .brand{font-size:21px}footer svg{width:29px}
@media(min-width:1400px){.cards{grid-template-columns:repeat(4,minmax(0,1fr))}.hero-copy{padding-left:15%}.hero{min-height:630px}}
@media(max-width:1200px){#site-nav{gap:19px}.hero-copy{padding-left:9%}.hero-actions{gap:15px}.cards{gap:18px}.volume-body{padding:22px}}
@media(max-width:960px){.header-inner{flex-wrap:wrap;padding:17px 5%;gap:0}.menu-toggle{display:block;margin-left:auto;background:transparent;color:var(--ink);border:1px solid var(--line);padding:7px 12px;border-radius:7px}#site-nav{display:none;width:100%;padding:19px 0 5px;flex-direction:column;align-items:stretch;gap:0}#site-nav.open{display:flex}#site-nav a{padding:12px 5px;border-top:1px solid var(--line)}.hero{min-height:530px;grid-template-columns:53% 47%}.hero-copy{padding-top:57px}.hero-actions{align-items:start;flex-direction:column}.hero-note{margin-top:25px}.cards{grid-template-columns:repeat(2,minmax(0,1fr))}.collection-intro>p{max-width:220px}.gateways{padding:0 25px;gap:12px}.gateways>a{padding:23px}.gateways h2{font-size:22px}.content{padding:0 25px}.section-heading>p{max-width:230px}.invitation{padding:32px}footer p{display:none}}
@media(max-width:600px){html{scroll-padding-top:85px}.brand{font-size:22px}.brand svg{width:32px;height:32px}.hero{display:flex;flex-direction:column}.hero-copy{padding:40px 24px 32px}.hero .eyebrow{font-size:8px;letter-spacing:1.6px}h1{font-size:39px;line-height:1.45;margin-bottom:20px}.hero-intro{font-size:13px}.hero-actions{flex-direction:row;align-items:center;gap:17px;margin-top:25px}.button{font-size:12px;padding:13px 17px;gap:20px}.text-link{font-size:11px}.hero-note{font-size:10px;margin-top:23px}.hero-art{height:260px;border-radius:32px 0 0 0;margin-left:24px;background-position:center 55%}.hero-art:before{background:linear-gradient(0deg,#142d3640,transparent)}.art-caption{font-size:10px;bottom:20px;right:20px}.gateways{grid-template-columns:1fr;padding:0 20px;margin-top:25px;gap:12px}.gateways>a{padding:21px 23px}.gateways h2{font-size:22px;line-height:1.45;margin:7px 0 13px}.gateways h2 br{display:none}.gateways .eyebrow{margin-bottom:0;font-size:8px}.gateways .arrow{bottom:20px}.content{padding:0 20px}.collection-intro{display:block;padding-top:53px}.collection-intro h2{font-size:27px}.collection-intro>p{max-width:none;margin-top:17px}.category-nav{gap:0;justify-content:space-between}.category-nav a{font-size:12px}.category-nav span{display:none}.collection{padding-top:43px}.section-heading{display:block;margin-bottom:20px}.section-heading h2{font-size:28px}.section-heading>p{max-width:none;margin-top:12px}.cards{grid-template-columns:1fr;gap:20px}.volume-art{height:220px}.volume-body{padding:24px}.volume-body h2{font-size:25px}.volume-body>p{font-size:13px}.volume-stats span{font-size:10px}.card-end{padding:15px 24px}.invitation{margin-top:45px;display:block;padding:28px 24px}.invitation h2{font-size:26px}.invitation .button{margin-top:15px}.philosophy{padding:55px 0 40px}.philosophy h2{font-size:28px}.philosophy>p{font-size:12px}footer{padding:24px 20px;flex-wrap:wrap;gap:15px}footer small{margin-left:auto}footer>a:last-child{width:100%;text-align:right}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
/* Civilization panorama: preserve the full six-city composition. */
.hero{display:block;aspect-ratio:1672/941;min-height:0;isolation:isolate;overflow:hidden}.hero-art{position:absolute;inset:0;z-index:-1;border-radius:0;background:none;margin:0;height:auto}.hero-art img{display:block;width:100%;height:100%;object-fit:contain}.hero-art:before{z-index:1;background:radial-gradient(ellipse at 8% 12%,#f7f5edf5 0%,#f7f5eddb 22%,#f7f5ed55 43%,transparent 65%)}.hero-copy{width:53%;padding:4.3% 0 0 6%;background:none}.hero h1{font-size:clamp(35px,3.5vw,56px);line-height:1.4;margin-bottom:18px}.hero-intro{margin:0;line-height:1.95}.hero-actions{margin-top:24px}.hero-note{margin-top:24px}.hero .art-caption{z-index:2;bottom:18px;right:4%;font-size:10px}.hero .eyebrow{margin-bottom:15px}
@media(max-width:1100px) and (min-width:601px){.hero-copy{padding-top:3%;width:56%}.hero h1{font-size:34px;margin-bottom:12px}.hero-intro{font-size:12px}.hero .eyebrow{font-size:8px;margin-bottom:10px}.hero-actions{flex-direction:row;gap:14px;margin-top:16px}.hero .button{padding:11px 15px;font-size:11px}.hero .text-link{font-size:10px}.hero-note{margin-top:15px;font-size:10px}}
@media(max-width:760px) and (min-width:601px){.hero{aspect-ratio:auto}.hero-copy{width:100%;padding:32px 25px}.hero-art{position:relative;z-index:0;aspect-ratio:1672/941}.hero-art:before{display:none}.hero h1{font-size:38px}}
@media(max-width:600px){.hero{display:flex;aspect-ratio:auto;min-height:0}.hero-copy{width:100%;padding:40px 24px 32px}.hero h1{font-size:39px;line-height:1.45}.hero-intro{font-size:13px}.hero-art{position:relative;inset:auto;z-index:0;aspect-ratio:1672/941;width:100%;height:auto;margin:0;border-radius:0}.hero-art:before{display:none}.hero .art-caption{bottom:7px;right:10px;font-size:8px}.hero .hero-note{margin-top:23px}}

/* Keep small overlay text legible over the approved panorama. */
@media(min-width:761px){.hero-actions .text-link{background:#f7f5edf0;padding:7px 10px;border-radius:4px}.hero-note{display:table;background:#f7f5edf0;color:#526052;padding:3px 8px;border-radius:4px}}

/* Clickable gateways share the panorama instead of adding a separate row. */
.hero-art .gateways{position:absolute;z-index:3;left:4%;bottom:4%;width:52%;max-width:none;padding:0;margin:0;gap:10px}.hero-art .gateways>a{padding:18px 15px;background:#f7f5edf0;border-color:#d6d7c9;box-shadow:0 5px 22px #173b3020;backdrop-filter:blur(5px);border-radius:12px}.hero-art .gateways>a:nth-child(2){background:#ece9dff0}.hero-art .gateways>a:nth-child(3){background:#e7ebe3f0}.hero-art .gateways h2{font-size:clamp(15px,1.4vw,22px);margin:8px 0 12px;line-height:1.5}.hero-art .gateways .eyebrow{font-size:8px;letter-spacing:1.5px;margin:0}.hero-art .gateways p{font-size:11px;line-height:1.5;padding-right:12px}.hero-art .gateways .arrow{font-size:20px;right:12px;bottom:13px}.hero-art:before{pointer-events:none}
@media(max-width:1100px){.hero{aspect-ratio:auto}.hero-copy{width:100%;padding:32px 25px}.hero-art{position:relative;inset:auto;z-index:0;aspect-ratio:1672/941;width:100%}.hero-art:before{display:none}.hero-art .gateways{left:3%;bottom:4%;width:53%;gap:7px}.hero-art .gateways>a{padding:11px 10px}.hero-art .gateways h2{font-size:15px;letter-spacing:-.7px;margin:5px 0 8px}.hero-art .gateways .eyebrow{font-size:6px;letter-spacing:1px}.hero-art .gateways p{font-size:9px}.hero-art .gateways .arrow{font-size:15px;right:8px;bottom:9px}}
@media(max-width:600px){.hero-copy{padding:40px 24px 32px}.hero-art .gateways{grid-template-columns:1fr;left:3%;bottom:5%;width:52%;gap:4px}.hero-art .gateways>a{padding:4px 9px;border-radius:6px;min-height:26px}.hero-art .gateways h2,.hero-art .gateways .eyebrow{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}.hero-art .gateways p{font-size:11px;line-height:16px;padding-right:16px;margin:0}.hero-art .gateways .arrow{font-size:15px;right:8px;bottom:2px}.hero .art-caption{max-width:43%;text-align:right;line-height:1.45;bottom:5px;right:8px}}

/* Compact desktop introduction layered over the panorama. */
@media(min-width:761px){
  .hero{display:block;aspect-ratio:auto;height:clamp(460px,40vw,600px);min-height:0;position:relative;isolation:isolate}
  .hero-art{position:absolute;inset:0;z-index:-1;width:100%;height:100%;aspect-ratio:auto;margin:0;background:none}
  .hero-art>img{width:100%;height:100%;object-fit:cover;object-position:center 55%}
  .hero-art:before{display:block;content:'';position:absolute;inset:0;z-index:1;background:linear-gradient(180deg,#f7f5edf2 0%,#f7f5edb8 40%,#f7f5ed20 65%,transparent 85%);pointer-events:none}
  .hero-copy{position:relative;z-index:2;display:grid;grid-template-columns:minmax(310px,460px) 230px;column-gap:35px;align-items:start;width:min(850px,94%);padding:30px 0 0 5%;background:none}
  .hero-copy>.eyebrow,.hero-copy>h1,.hero-copy>.hero-intro{grid-column:1}
  .hero-copy>.eyebrow{margin-bottom:12px}
  .hero h1{font-size:clamp(32px,3.2vw,48px);line-height:1.38;margin:0 0 14px}
  .hero-intro{font-size:14px;line-height:1.9;margin:0}
  .hero-actions{grid-column:2;grid-row:1/4;display:flex;flex-direction:column;align-items:stretch;justify-content:center;gap:14px;margin:0;align-self:center}
  .hero-actions .button{padding:14px 18px;font-size:13px;gap:12px;white-space:nowrap}
  .hero-actions .text-link{padding:9px 10px;text-align:center;background:#f7f5edf2;font-size:12px;white-space:nowrap}
  .hero-art .gateways{z-index:3;bottom:4%;left:4%;width:57%;max-width:850px}
  .hero-art .gateways>a{padding:13px 15px}
  .hero-art .gateways h2{font-size:clamp(16px,1.4vw,21px);margin:6px 0 8px}
  .hero-art .gateways .eyebrow{font-size:8px}
  .hero-art .gateways p{font-size:11px}
  .collection-intro{padding-top:38px}
}
@media(min-width:761px) and (max-width:1000px){
  .hero-copy{grid-template-columns:minmax(310px,1fr) 210px;column-gap:22px;width:94%;padding-top:25px}
  .hero-art .gateways{width:68%}
  .hero-art .gateways>a{padding:12px}
  .hero-art .gateways h2{font-size:16px}
}

/* Make the collection visible earlier without removing its introduction. */
@media(min-width:761px){
 .hero{height:clamp(340px,25vw,380px)}
 .hero-copy{padding-top:22px}
 .hero h1{font-size:clamp(30px,2.5vw,36px);line-height:1.35;margin-bottom:10px}
 .hero-copy>.eyebrow{margin-bottom:8px;font-size:9px}
 .hero-intro{font-size:13px;line-height:1.8}
 .hero-art .gateways{width:57%;bottom:16px;gap:10px}
 .hero-art .gateways>a{padding:12px 15px;min-height:48px;border-radius:8px}
 .hero-art .gateways h2,.hero-art .gateways .eyebrow{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}
 .hero-art .gateways p{font-size:13px;line-height:24px;margin:0;padding-right:22px}
 .hero-art .gateways .arrow{font-size:18px;right:12px;bottom:10px}
 .collection-intro{padding-top:24px;margin-bottom:18px}
 .collection-intro h2{font-size:28px}
 .category-nav{padding:12px 0}
 .collection{padding-top:32px}
 .section-heading{margin-bottom:18px}
}
@media(min-width:761px) and (max-width:1000px){.hero{height:350px}.hero-art .gateways{width:68%}}
@media(max-width:760px){
 .hero-copy{padding:24px 24px 20px}
 .hero h1{font-size:32px;line-height:1.35;margin-bottom:12px}
 .hero .eyebrow{margin-bottom:10px}
 .hero-intro{font-size:12px;line-height:1.8}
 .hero-actions{margin-top:16px}
 .collection-intro{padding-top:25px;margin-bottom:18px}
 .collection{padding-top:30px}
}
@media(min-width:761px){.hero-art:before{background:linear-gradient(90deg,#f7f5edf2 0%,#f7f5edd9 23%,#f7f5ed66 42%,transparent 65%)}}

/* AiaCube motto: Pretendard, visible above phone width */
@font-face{font-family:AIACubeMotto;src:local("Pretendard Regular"),local("Pretendard"),url("/assets/fonts/pretendard-motto.woff2") format("woff2");font-weight:400;font-style:normal;font-display:swap}
.motto{font-family:AIACubeMotto,"Pretendard","Malgun Gothic",sans-serif;white-space:nowrap;flex-shrink:0}
@media(min-width:961px) and (max-width:1060px){.header-inner{gap:14px}.motto{font-size:12px!important;padding-left:12px}#site-nav{gap:14px}}
@media(max-width:600px){.motto{display:block;flex:0 0 100%;order:3;border-left:0;padding-left:0;font-size:11px!important;line-height:1.4;margin-top:1px}#site-nav{order:4}}

/* Literacy shortcut: retain existing destinations and cards. */
@media(min-width:761px){.hero-art .gateways{grid-template-columns:repeat(4,minmax(0,1fr));width:76%;max-width:1100px;gap:10px}}
.hero-art .gateways>a:nth-child(3){background:#ece9dff0}.hero-art .gateways>a:nth-child(4){background:#e7ebe3f0}
@media(max-width:760px){.hero-art .gateways{grid-template-columns:repeat(2,minmax(0,1fr));width:92%;gap:7px;left:4%}.hero-art .gateways>a{padding:9px 10px;min-height:44px}.hero-art .gateways p{font-size:12px;padding-right:17px}.hero-art .gateways .arrow{right:8px}}