@import url('https://fonts.googleapis.com/css2?family=Black+Han+Sans&family=Nunito:wght@600;800;900&family=Noto+Sans+KR:wght@500;800&display=swap');
:root{--bg:#140d33;--card:#241857;--line:#3a2d7a;--gold:#ffd54a;--ink:#fff;--muted:#cfc6f2;--blue:#3b82f6;--green:#22c55e;--yellow:#facc15;--red:#ef4444}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font-family:Nunito,'Noto Sans KR',system-ui,sans-serif;line-height:1.65}
a{color:var(--gold)}
img{max-width:100%;display:block}
.wrap{max-width:1040px;margin:0 auto;padding:0 20px}
.k{font-family:'Black Han Sans','Noto Sans KR',sans-serif;font-weight:400}
header.top{position:sticky;top:0;z-index:10;background:rgba(20,13,51,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
header.top .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-family:'Black Han Sans';font-size:22px}
.logo img{width:36px;height:36px;border-radius:50%}
.logo span{color:var(--gold)}
nav a{color:var(--muted);text-decoration:none;font-weight:800;margin-left:20px}
nav a:hover{color:var(--ink)}
.hero{padding:72px 0 48px;text-align:center;background:radial-gradient(circle at 50% 30%,#2e1d6e 0,var(--bg) 60%)}
.hero h1{font-family:'Black Han Sans';font-weight:400;font-size:clamp(36px,6vw,62px);line-height:1.1;margin:18px 0 12px}
.hero h1 span{color:var(--gold)}
.hero p{color:var(--muted);font-size:19px;max-width:640px;margin:0 auto}
.blocks{display:inline-grid;grid-template-columns:repeat(4,64px);gap:8px}
.blocks div{height:64px;border-radius:18px;display:flex;align-items:center;justify-content:center;font-family:'Black Han Sans';font-size:34px;border:2px solid rgba(255,255,255,.4)}
.btn{display:inline-block;background:var(--gold);color:#1d1640;font-weight:900;text-decoration:none;padding:13px 24px;border-radius:14px;border:0;font-size:16px;cursor:pointer;font-family:inherit}
.btn.ghost{background:transparent;color:var(--ink);border:2px solid var(--line)}
section{padding:40px 0}
h2{font-size:28px;margin:0 0 16px;line-height:1.25}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:18px}
.card{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:18px;text-decoration:none;color:var(--ink);display:block}
a.card:hover{border-color:var(--gold)}
.card .tag{display:inline-block;font-size:12px;font-weight:900;letter-spacing:1px;color:#1d1640;background:var(--gold);border-radius:8px;padding:2px 8px}
.card h3{margin:10px 0 6px;font-size:20px}
.card p{margin:0;color:var(--muted);font-size:15px}
.card .big{font-family:'Black Han Sans';font-size:80px;line-height:1;color:var(--gold);text-align:center;padding:10px 0}
.soon{opacity:.5}
.mail{background:linear-gradient(135deg,#2a1b68,#1d1347);border:1px solid var(--line);border-radius:24px;padding:28px;display:grid;grid-template-columns:1.2fr 1fr;gap:24px;align-items:center}
.mail h2{margin-bottom:8px}
.mail p{color:var(--muted);margin:0}
.mail form{display:flex;gap:10px;flex-wrap:wrap}
.mail input[type=email]{flex:1;min-width:200px;padding:13px 14px;border-radius:12px;border:2px solid var(--line);background:#120b2e;color:var(--ink);font-size:16px;font-family:inherit}
.mail small{display:block;color:var(--muted);margin-top:8px;font-size:12px;width:100%}
.mail .msg{width:100%;font-weight:800;margin-top:6px}
footer{border-top:1px solid var(--line);padding:28px 0;color:var(--muted);font-size:14px}
footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
.lesson-head{padding:40px 0 10px}
.crumb{color:var(--muted);font-weight:800;font-size:14px}
.lesson-head h1{font-size:clamp(28px,4vw,42px);margin:8px 0;line-height:1.2}
.lesson-head .lead{color:var(--muted);font-size:18px;max-width:760px}
.lesson-grid{display:grid;grid-template-columns:minmax(0,340px) 1fr;gap:28px;align-items:start}
.side{position:sticky;top:84px}
.video{aspect-ratio:9/16;border-radius:20px;overflow:hidden;background:var(--card);border:1px solid var(--line);position:relative}
.video iframe{width:100%;height:100%;border:0}
.video .ph{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:20px;color:var(--muted)}
.video .ph .k{font-size:140px;color:var(--gold);line-height:1}
article .box{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:22px 24px;margin-bottom:18px}
article h2{font-size:24px}
article h3{font-size:19px;margin:18px 0 6px}
article p,article li{color:#e9e4ff}
.mouth{display:grid;grid-template-columns:220px 1fr;gap:18px;align-items:center}
.mouth svg{width:100%;max-width:240px;margin:0 auto;display:block}
.words{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.words figure{margin:0;background:#fff8e7;border-radius:16px;padding:10px;color:#1d1640;text-align:center}
.words img{border-radius:12px}
.words .k{font-size:28px}.words b{color:#d4a300;font-weight:400}
.chant{font-family:'Noto Sans KR';font-weight:800;font-size:20px;line-height:1.9}
.chant small{color:var(--muted);font-family:Nunito;font-size:14px}
.pill{display:inline-block;font-family:'Black Han Sans';font-size:24px;padding:6px 16px;border-radius:12px;margin:4px;color:#fff}
.quiz .q{margin:14px 0 8px;font-weight:900}
.quiz button{background:#120b2e;color:var(--ink);border:2px solid var(--line);border-radius:12px;padding:10px 18px;font-size:22px;margin:0 8px 8px 0;cursor:pointer;font-family:'Black Han Sans','Noto Sans KR'}
.quiz button.ok{border-color:var(--green);background:rgba(34,197,94,.25)}
.quiz button.no{border-color:var(--red);background:rgba(239,68,68,.2)}
table{border-collapse:collapse;width:100%}
td,th{border-bottom:1px solid var(--line);padding:8px 6px;text-align:left}
th{color:var(--gold)}
details{border-bottom:1px solid var(--line);padding:10px 0}
summary{font-weight:900;cursor:pointer}
@media (max-width:760px){.lesson-grid,.mail,.mouth{grid-template-columns:1fr}.side{position:static}.words{grid-template-columns:repeat(2,1fr)}nav a{margin-left:12px}.video{max-width:340px;margin:0 auto}}