:root{--ink:#153451;--soft:#668096;--edge:#d8e4f0;--navy:#112e50;--blue:#2774a9;--page:#f3f7fc}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--page);font-family:'Be Vietnam Pro','Noto Sans KR',system-ui,sans-serif;line-height:1.7}a{color:#185f9c}button{font:inherit}button:focus-visible,a:focus-visible{outline:3px solid #db9d3c;outline-offset:3px}.container{max-width:1210px;margin:auto;padding:0 20px}.skip{position:absolute;left:-500px;top:10px;background:white;z-index:100}.skip:focus{left:10px}.topbar{background:#fff;border-bottom:1px solid var(--edge)}.topcontent{display:flex;justify-content:space-between;gap:16px;align-items:center;min-height:80px}.brand{display:flex;gap:10px;align-items:center;text-decoration:none;color:var(--navy);font-size:16px;font-weight:800;white-space:nowrap}.brand img{width:52px;height:46px;object-fit:contain}.brand small{display:block;color:#738aa1;letter-spacing:.04em;font-size:9px}.topbar nav{display:flex;flex-wrap:wrap;gap:8px}.topbar nav a{padding:8px 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p{font-size:12px;color:#6b849a}footer{text-align:center;color:#7e93a5;font-size:10px;padding:30px}footer a{color:#296d98}
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@media(max-width:690px){.topcontent{flex-wrap:wrap;padding-top:13px;padding-bottom:10px}.topbar nav{width:100%;gap:3px;overflow-x:auto;flex-wrap:nowrap}.topbar nav a{white-space:nowrap}.hero{padding:25px 18px;min-height:0}.hero-orbit{display:none}.stats{grid-template-columns:repeat(2,minmax(0,1fr))}.level-grid,.lesson-grid{grid-template-columns:1fr}.section-head{display:block}.detail-head{display:block}.learning-columns{grid-template-columns:1fr}.reward-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.container{padding:0 13px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.level-card{transition:none}}