@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Noto+Sans+KR:wght@400;500;700&display=swap');
:root{--bg:#0a0b0c;--panel:#111315e6;--text:#efeee9;--muted:#9a9a94;--accent:#dba77e;--line:#ffffff1c}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:80px}
body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,'Noto Sans KR',Arial,sans-serif;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
button,input,select{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:4px}
.skip{position:fixed;top:-100px;left:16px;z-index:50;background:var(--text);color:#111;padding:12px}.skip:focus{top:10px}
#scene{position:fixed;inset:0;width:100%;height:100%;display:block;z-index:0}
.header{position:fixed;top:0;left:0;right:0;z-index:10;height:72px;padding:0 4.5%;display:flex;align-items:center;justify-content:space-between;background:linear-gradient(#0a0b0ce6,#0a0b0c00)}
.brand{display:flex;align-items:center;gap:10px;font-size:13px;font-weight:700;letter-spacing:.03em}
.brand svg{width:28px;height:28px}.brand small{display:block;font-size:9px;font-weight:400;letter-spacing:.16em}
.header nav{display:flex;gap:26px;font-size:13px;color:#d0d0ca}.header nav a{white-space:nowrap}.header nav a[aria-current]{color:var(--accent)}.header nav a:hover{color:var(--accent)}
.progress{position:fixed;left:4.5%;top:50%;transform:translateY(-50%);z-index:5;list-style:none;margin:0;padding:0;display:grid;gap:14px;font-size:11px;letter-spacing:.06em}
.progress a{display:flex;align-items:center;gap:10px;color:#77766f;transition:color .3s}
.progress a::before{content:'';width:18px;height:1px;background:currentColor;transition:width .3s}
.progress a[aria-current]{color:var(--accent)}.progress a[aria-current]::before{width:36px}
main{position:relative;z-index:1}
.chapter{min-height:100vh;padding:120px 8% 80px 8%;display:flex;align-items:center;justify-content:flex-end}
.hero{flex-direction:column;align-items:flex-start;justify-content:center;padding-left:14%}
.eyebrow{font-size:12px;letter-spacing:.08em;color:#d1c5b4;margin:0 0 22px}
h1{font-size:clamp(64px,9vw,150px);line-height:.88;letter-spacing:-.06em;font-weight:600;margin:0;text-shadow:0 4px 40px #000a}
h1 span{color:var(--accent)}
.lead{font-size:15px;line-height:1.8;color:#c9c7c0;margin:30px 0 0;text-shadow:0 2px 12px #000}
.scroll-cue{margin-top:56px;font-size:11px;letter-spacing:.14em;color:#b4b0a5}
.card{width:min(420px,100%);padding:34px;background:var(--panel);border:1px solid var(--line);border-radius:4px;backdrop-filter:blur(10px)}
.chapter:nth-of-type(even){justify-content:flex-start;padding-left:18%}
.step{font-size:10px;letter-spacing:.14em;color:var(--accent)}
.card h2{font-size:44px;font-weight:600;letter-spacing:-.03em;margin:14px 0 18px}
.card h2 small{display:block;font-size:15px;font-weight:500;letter-spacing:0;color:#cfc9bd;margin-top:10px}
.card p{font-size:14px;line-height:1.85;color:#b9b8b1;margin:0}
.card ul{list-style:none;padding:0;margin:22px 0;display:flex;flex-wrap:wrap;gap:8px}
.card li{font-size:12px;padding:6px 11px;border:1px solid var(--line);border-radius:20px;color:#d7d4cc}
.card .btn{display:inline-block;margin:0 6px 6px 0;background:#f1eee6;color:#181917;border:0;border-radius:30px;padding:12px 20px;font-size:13px;font-weight:600;cursor:pointer}
.card .btn:hover{background:var(--accent)}.card .btn.ghost{background:none;color:var(--text);border:1px solid #ffffff40}.card .btn.ghost:hover{border-color:var(--accent);color:var(--accent);background:none}
.portal,.areas{position:relative;background:var(--bg);padding:120px 8% 100px;border-top:1px solid var(--line)}
.portal-head{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:end;margin-bottom:48px}
.portal-head .step{grid-column:1/-1}
.portal-head h2{font-size:clamp(38px,5vw,64px);line-height:1.08;letter-spacing:-.04em;font-weight:600;margin:0}
.portal-head h2 span{color:var(--accent)}
.portal-head p{color:var(--muted);font-size:14px;line-height:1.8;margin:0}.portal-head p a{color:var(--accent);text-decoration:underline}
.portal-metrics{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-bottom:36px}
.portal-metrics div{padding:24px 0}.portal-metrics strong{font-size:34px;font-weight:600}.portal-metrics strong span{font-size:13px;margin-left:3px;color:var(--muted)}.portal-metrics p{margin:6px 0 0;font-size:12px;color:var(--muted)}
.portal-toolbar{display:flex;gap:20px;align-items:center;flex-wrap:wrap;margin-bottom:18px}
.portal-search{flex:1;min-width:240px;display:flex;align-items:center;gap:10px;border:1px solid var(--line);border-radius:30px;padding:0 16px;background:#141618}
.portal-search input{flex:1;border:0;background:none;padding:14px 0;outline:none}
.portal-search kbd{font-size:11px;color:var(--muted);border:1px solid var(--line);border-radius:4px;padding:1px 6px}
.available-filter{font-size:13px;color:#c8c6bf;display:flex;gap:8px;align-items:center}
.portal-tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px}
.portal-tabs button{background:none;border:1px solid var(--line);border-radius:20px;padding:8px 14px;font-size:13px;color:#c8c6bf;cursor:pointer}
.portal-tabs button span{margin-left:6px;font-size:11px;color:var(--muted)}
.portal-tabs button[aria-pressed=true]{background:var(--text);color:#111}.portal-tabs button[aria-pressed=true] span{color:#555}
.portal-filter-row{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--muted);margin-bottom:24px}
.portal-filter-row select{margin-left:10px;background:#141618;border:1px solid var(--line);border-radius:4px;padding:7px 10px}
.portal-results{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.resource-card{display:flex;flex-direction:column;gap:12px;padding:24px;background:#121416;border:1px solid var(--line);border-radius:4px;transition:border-color .2s}
.resource-card:hover{border-color:#dba77e88}.resource-card.unavailable{opacity:.6}
.resource-top,.resource-bottom{display:flex;justify-content:space-between;gap:10px;font-size:11px;color:var(--muted)}
.file-type{color:var(--accent)}
.resource-card h3{font-size:17px;line-height:1.4;margin:0;font-weight:600}
.resource-card p{font-size:13px;line-height:1.7;color:#aaa9a2;margin:0;flex:1;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.resource-tags{display:flex;flex-wrap:wrap;gap:6px}.resource-tags span{font-size:11px;padding:3px 8px;background:#1d2023;border-radius:10px;color:#c2c0b8}
.resource-bottom a{color:var(--text)}.resource-bottom a:hover{color:var(--accent)}
.portal-more{display:block;margin:32px auto 0;background:none;border:1px solid var(--line);border-radius:30px;padding:12px 24px;cursor:pointer}
#portal-empty{color:var(--muted)}
footer{position:relative;z-index:1;background:var(--bg);border-top:1px solid var(--line);padding:28px 8%;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:12px;color:var(--muted)}
footer nav{display:flex;gap:24px}footer a:hover{color:var(--accent)}
.no-webgl{position:fixed;bottom:16px;left:16px;right:16px;z-index:20;margin:0;padding:12px 16px;background:var(--panel);border:1px solid var(--line);font-size:13px}
body.no-3d{background:radial-gradient(ellipse at 70% 30%,#25211a,#0a0b0c 60%) fixed}
@media(max-width:900px){.portal-results{grid-template-columns:repeat(2,1fr)}.progress{display:none}.chapter,.chapter:nth-of-type(even){justify-content:center;padding:100px 16px 130px;align-items:flex-end}.hero{padding-left:16px;align-items:flex-start;justify-content:center}}
@media(max-width:640px){.header{padding:0 16px}.header nav{gap:14px;font-size:12px}.portal{padding:80px 16px}.portal-head{grid-template-columns:1fr}.portal-metrics{grid-template-columns:repeat(2,1fr)}.portal-results{grid-template-columns:1fr}.card{padding:24px}.card h2{font-size:34px}footer{padding:24px 16px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
/* Knowledge map on the 3D home */
.area-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.area-cards a{display:flex;flex-direction:column;gap:12px;padding:28px;min-height:250px;background:#121416;border:1px solid var(--line);border-radius:4px;transition:border-color .2s,transform .2s}
.area-cards a:hover{border-color:var(--accent);transform:translateY(-3px)}
.area-cards h3{font-size:24px;font-weight:600;margin:0}.area-cards p{flex:1;margin:0;font-size:13px;line-height:1.8;color:#aaa9a2}.area-cards b{font-size:13px;color:var(--accent)}
.about-link{display:inline-block;margin-top:32px;font-size:14px;color:#d0d0ca;border-bottom:1px solid #ffffff40;padding-bottom:4px}.about-link:hover{color:var(--accent)}
/* Sub pages */
body.page .header{background:#0a0b0cf2;border-bottom:1px solid var(--line)}
.page-hero{padding:150px 8% 60px;max-width:1100px}
.page-hero h1{font-size:clamp(36px,5vw,64px);line-height:1.12;letter-spacing:-.04em;font-weight:600;margin:16px 0 24px}.page-hero h1 span{color:var(--accent)}
.page-hero p{font-size:15px;line-height:1.9;color:#bdbbb4;margin:0 0 12px;max-width:760px}.page-hero .en{color:var(--muted);font-size:14px}
.band{padding:80px 8%;border-top:1px solid var(--line)}
.band h2{font-size:clamp(28px,3.4vw,42px);letter-spacing:-.03em;font-weight:600;margin:14px 0 28px}
.band-desc{color:var(--muted);font-size:14px;line-height:1.8;margin:-12px 0 28px;max-width:760px}
.links{display:flex;flex-wrap:wrap;gap:12px 28px;margin-top:28px;font-size:14px}.links a{color:var(--accent)}.links a:hover{text-decoration:underline}
.greeting-body{display:grid;grid-template-columns:1fr 1.4fr;gap:60px}
.letter p{font-size:15px;line-height:2;color:#c9c7c0;margin:0 0 18px}.letter .sign{margin-top:32px;color:var(--text);font-weight:600}
.services{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(5,1fr);border-top:1px solid var(--line)}
.services li{padding:24px 18px 24px 0;display:grid;gap:8px;counter-increment:svc}.services li::before{content:'0' counter(svc);font-size:11px;color:var(--accent)}
.services b{font-size:16px;font-weight:600}.services span{font-size:12px;color:var(--muted);line-height:1.6}
.projects{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.projects article{padding:24px;background:#121416;border:1px solid var(--line);border-radius:4px}.projects h3{margin:0 0 10px;font-size:17px}.projects p{margin:0;font-size:13px;line-height:1.75;color:#aaa9a2}
/* Library */
.origin{margin-top:24px;padding:18px 22px;border:1px solid var(--line);border-left:2px solid var(--accent);background:#111315;max-width:900px}
.origin p{margin:0 0 10px;font-size:12px;color:var(--muted)}.origin p a{color:var(--accent)}
.origin ul{list-style:none;margin:0;padding:0;display:grid;gap:6px;font-size:13px;color:#c9c7c0}.origin b{display:inline-block;min-width:110px;color:var(--text);font-weight:600}
.library-body{display:grid;grid-template-columns:230px 1fr;gap:40px;padding:20px 8% 100px}
.groups>div{position:sticky;top:96px;display:grid;gap:4px}
.groups button{display:flex;justify-content:space-between;gap:10px;background:none;border:0;border-left:2px solid transparent;padding:10px 12px;text-align:left;font-size:14px;color:#b9b8b1;cursor:pointer}
.groups button span{font-size:12px;color:var(--muted)}.groups button:hover{color:var(--text)}
.groups button[aria-pressed=true]{border-left-color:var(--accent);color:var(--text);background:#15181a}
.count{font-size:13px;color:var(--muted);margin:0 0 16px}
.library .portal-results{grid-template-columns:repeat(3,1fr)}
/* Videos */
.channel-row{display:flex;flex-wrap:wrap;align-items:center;gap:18px;margin-top:24px;font-size:13px;color:var(--muted)}
.pill-link{background:#f1eee6;color:#181917;border-radius:30px;padding:12px 20px;font-size:13px;font-weight:600}.pill-link:hover{background:var(--accent)}
.jump{display:flex;flex-wrap:wrap;gap:8px;margin-top:36px}.jump a{font-size:13px;padding:8px 14px;border:1px solid var(--line);border-radius:20px;color:#c8c6bf}.jump a:hover{border-color:var(--accent);color:var(--accent)}
.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.video h3{font-size:14px;line-height:1.5;margin:10px 0 4px;font-weight:500}.video p{margin:0;font-size:12px;color:var(--muted)}
.thumb,.player{display:block;width:100%;aspect-ratio:16/9;border:0;border-radius:4px;background:#15181a}
.thumb{position:relative;padding:0;overflow:hidden;cursor:pointer}
.thumb img{width:100%;height:100%;object-fit:cover;display:block;opacity:.85;transition:opacity .2s}.thumb:hover img{opacity:1}
.thumb i{position:absolute;inset:0;margin:auto;width:48px;height:48px;display:grid;place-items:center;border-radius:50%;background:#000a;color:#fff;font-style:normal;font-size:16px}
.thumb.local{background:linear-gradient(135deg,#1d2126,#121416)}.thumb.local span{position:absolute;left:14px;top:12px;font-size:30px;font-weight:600;color:#ffffff30}
.thumb:hover i{background:var(--accent);color:#111}
@media(max-width:1100px){.header nav{gap:16px;font-size:12px}.area-cards,.projects,.video-grid{grid-template-columns:repeat(2,1fr)}.services{grid-template-columns:repeat(3,1fr)}.library .portal-results}
@media(max-width:900px){.header{height:auto;min-height:72px;flex-wrap:wrap;gap:6px;padding:12px 4.5%}.header nav{width:100%;overflow-x:auto;padding-bottom:4px}.greeting-body,.library-body{grid-template-columns:1fr;gap:24px}.groups>div{position:static;display:flex;overflow-x:auto}.groups button{border-left:0;border-bottom:2px solid transparent;white-space:nowrap}.groups button[aria-pressed=true]{border-bottom-color:var(--accent)}}
@media(max-width:640px){.page-hero{padding:140px 16px 40px}.band{padding:56px 16px}.library-body{padding:12px 16px 80px}.area-cards,.projects,.video-grid,.services,.library .portal-results}
.past-scene .progress{opacity:0;pointer-events:none}.progress{transition:opacity .3s}
.library-body>*{min-width:0}
.video-grid.yt{margin-top:28px}
.episodes{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(2,1fr);gap:8px}
.episodes li{display:grid;grid-template-columns:64px 1fr auto;align-items:center;gap:14px;padding:16px 18px;border:1px solid var(--line);border-radius:4px;background:#121416;font-size:14px}
.episodes .no{font-size:12px;color:var(--accent)}.episodes a:hover{color:var(--accent)}.episodes time{font-size:12px;color:var(--muted)}
.episodes li.upcoming{opacity:.55}
@media(max-width:900px){.episodes{grid-template-columns:1fr}}
@media(max-width:640px){.episodes li{grid-template-columns:1fr;gap:4px}}
.series+.series{margin-top:48px}.series h3{font-size:20px;font-weight:600;margin:0 0 10px}
[hidden]{display:none!important}