@font-face{font-family:PT;src:url(assets/fonts/Pretendard-Regular.woff2) format('woff2');font-weight:400;font-display:swap}
@font-face{font-family:PT;src:url(assets/fonts/Pretendard-Bold.woff2) format('woff2');font-weight:700;font-display:swap}
@font-face{font-family:PT;src:url(assets/fonts/Pretendard-ExtraBold.woff2) format('woff2');font-weight:800;font-display:swap}
:root{color-scheme:dark;--bg:#15181b;--surface:#22282d;--ink:#e8e6e1;--secondary:#b7bec3;--accent:#7fd4de;--gold:#f0c24b;--line:#414a52}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:400 20px/1.65 PT,sans-serif;word-break:keep-all;overflow-wrap:break-word;-webkit-font-smoothing:antialiased}
.wrap{width:min(1280px,calc(100% - 96px));margin-inline:auto}
.masthead{min-height:100px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);gap:20px}
.brand{font-size:32px;font-weight:800;letter-spacing:-.06em}.brand-dot{color:var(--gold)}.publisher{color:var(--secondary);font-size:18px}
.hero{padding:68px 0 62px}.eyebrow{color:var(--gold);font-weight:700;margin:0 0 18px;font-size:20px}
h1{font-size:clamp(40px,4vw,58px);line-height:1.28;letter-spacing:-.045em;margin:0 0 24px;font-weight:800}
.intro{margin:0;color:var(--secondary);font-size:22px;line-height:1.75}
.subject-group{margin-bottom:48px}.group-heading{display:flex;gap:16px;align-items:baseline;margin-bottom:20px}.group-number{color:var(--accent);font-size:18px;font-weight:700}h2{font-size:28px;line-height:1.4;letter-spacing:-.025em;margin:0}
.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;align-items:start}
.card{display:flex;flex-direction:column;min-width:0;min-height:290px;padding:28px;background:var(--surface);border:1px solid var(--line);border-radius:18px;color:var(--ink);text-decoration:none}
.available{border-color:var(--accent);background:linear-gradient(135deg,#203439,var(--surface));transition:transform .15s,border-color .15s}.available:hover,.available:focus-visible{transform:translateY(-3px);border-color:var(--gold)}
.card-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:22px}.subject-mark{font-size:24px;font-weight:800;color:var(--secondary);line-height:1.2}.available .subject-mark{color:var(--accent)}
.status{font-size:18px;line-height:1.5;padding:3px 12px;border:1px solid #647079;border-radius:30px;color:var(--secondary)}.status.live{color:var(--accent);border-color:var(--accent);background:#17333a}
h3{font-size:28px;line-height:1.4;letter-spacing:-.035em;margin:0 0 8px}.subtitle{color:var(--secondary);margin:0 0 28px;font-size:20px}
.subtitle+.access-note{margin:-18px 0 24px;font-size:18px;line-height:1.5;color:var(--gold)}
.card-bottom{border-top:1px solid var(--line);padding-top:18px;min-height:67px;margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:18px;color:var(--secondary)}.open{display:inline-flex;align-items:center;gap:8px;min-height:48px;padding:0 20px;border-radius:12px;background:var(--accent);color:#0f1d20;font-weight:700}.available:hover .open,.available:focus-visible .open{background:var(--gold)}.lessons{color:var(--ink)}
footer{border-top:1px solid var(--line);padding-block:28px 40px;color:var(--secondary);font-size:18px}
.skip{position:absolute;top:8px;left:8px;transform:translateY(-160%);background:var(--ink);color:var(--bg);padding:12px 18px;z-index:10;min-height:48px}.skip:focus{transform:none}a:focus-visible{outline:3px solid var(--gold);outline-offset:6px}
.card.upcoming{flex-direction:row;align-items:center;gap:18px;min-height:0;padding:18px 22px;background:#1b1f23;border-color:#30373d}
.upcoming .subject-mark{flex:none;display:grid;place-items:center;width:48px;height:48px;border-radius:12px;background:#262c31;font-size:20px;color:#9aa3a9}
.up-body{min-width:0}.upcoming h3{font-size:22px;margin:0;color:#c6ccd0}.upcoming .subtitle{margin:0;font-size:18px;color:#9aa3a9;line-height:1.5}
.upcoming .status{flex:none;margin-left:auto;font-size:17px;padding:2px 10px;border-color:#4b545b;color:#9aa3a9}
@media(max-width:1050px){.cards{grid-template-columns:repeat(2,minmax(0,1fr))}.wrap{width:calc(100% - 64px)}}
@media(max-width:600px){.wrap{width:calc(100% - 40px)}.masthead{min-height:80px}.brand{font-size:28px}.publisher{font-size:16px}.hero{padding:42px 0}h1{font-size:36px}.intro{font-size:20px}h2{font-size:25px}.group-heading{gap:10px}.cards{grid-template-columns:1fr;gap:16px}.card{padding:24px;min-height:0}.card.upcoming{padding:16px 18px;gap:14px}h3{font-size:28px}.subject-group{margin-bottom:36px}footer{font-size:16px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.available{transition:none}.available:hover,.available:focus-visible{transform:none}}