:root{--pink:#FF1493;--pink-dark:#C70E78;--ink:#4D4D4D;--text:#2b2b2b;--soft:#FFF1F8;--line:#ececec;--bg:#fff;--card:#fff}
@media (prefers-color-scheme:dark){:root{--ink:#d9d9d9;--text:#f2f2f2;--soft:#2a1722;--line:#333;--bg:#151515;--card:#1d1d1d}}
*{box-sizing:border-box}
body{margin:0;font:17px/1.6 Figtree,system-ui,-apple-system,"Segoe UI",sans-serif;color:var(--text);background:var(--bg)}
a{color:var(--pink-dark)}
:focus-visible{outline:3px solid var(--pink);outline-offset:2px}
.wrap{max-width:720px;margin:0 auto;padding:0 20px}
header{padding:20px 0}
header .wrap{display:flex;justify-content:space-between;align-items:center}
header img{height:48px;display:block}
header a.link{font-weight:600;text-decoration:none;color:var(--ink)}
h1{font-size:clamp(2rem,7vw,3rem);line-height:1.1;margin:56px 0 12px;color:var(--ink);letter-spacing:-.02em}
.lead{font-size:1.15rem;color:var(--ink);margin:0 0 40px;max-width:34ch}
.course{border:1.5px solid var(--line);background:var(--card);border-radius:16px;padding:28px;margin-bottom:20px}
.course h2{margin:0;font-size:1.6rem;color:var(--ink);line-height:1.2}
.course .sub{margin:4px 0 14px;color:var(--pink-dark);font-weight:600}
.course p{margin:0 0 22px;color:var(--ink)}
.row{display:flex;gap:16px;align-items:center;flex-wrap:wrap}
.price{font-size:1.5rem;font-weight:800;color:var(--text)}
button,.btn{font:inherit;font-weight:700;background:var(--pink);color:#fff;border:0;border-radius:12px;padding:14px 24px;cursor:pointer;text-decoration:none;display:inline-block}
button:hover,.btn:hover{background:var(--pink-dark)}
button:disabled{opacity:.6;cursor:wait}
input{font:inherit;width:100%;padding:13px 14px;border:1.5px solid var(--line);border-radius:12px;background:var(--bg);color:var(--text);margin:6px 0 14px}
label{font-weight:600;color:var(--ink)}
.note{color:var(--ink);font-size:.95rem}
.err{color:#c4161c;font-weight:600;min-height:1.4em;margin:0 0 10px}
dialog{border:0;border-radius:16px;padding:28px;width:min(92vw,420px);background:var(--card);color:var(--text)}
dialog::backdrop{background:rgba(0,0,0,.5)}
dialog h3{margin:0 0 16px;font-size:1.3rem}
.access{margin:48px 0;padding:24px;background:var(--soft);border-radius:16px}
.access h2{margin:0 0 4px;font-size:1.2rem;color:var(--ink)}
footer{padding:32px 0 48px;color:var(--ink);font-size:.9rem}
.player{aspect-ratio:16/9;width:100%;border:0;border-radius:14px;background:#000;display:block}
.lessons{list-style:none;padding:0;margin:20px 0}
.lessons button{width:100%;text-align:left;background:var(--card);color:var(--text);border:1.5px solid var(--line);margin-bottom:8px;font-weight:600}
.lessons button:hover{border-color:var(--pink)}
.lessons button[aria-current=true]{border-color:var(--pink);background:var(--soft)}
@media (prefers-color-scheme:dark){header img{background:#fff;border-radius:8px;padding:4px}}
.vwrap{position:relative;aspect-ratio:16/9;background:#000;border-radius:14px;overflow:hidden}
.vwrap iframe,.vwrap #yt{position:absolute;inset:0;width:100%;height:100%;border:0}
.vwrap:fullscreen{border-radius:0;aspect-ratio:auto}
.shield{position:absolute;inset:0;z-index:2;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;color:#fff;text-align:center;padding:16px 16px 56px;cursor:pointer;font-weight:600}
.shield.cued,.shield.ended{background:#141414}
.shield.paused{background:rgba(0,0,0,.6)}
.shield.playing{background:transparent}
.shield .icon{width:72px;height:72px;border-radius:50%;background:var(--pink);display:grid;place-items:center;font-size:30px}
.shield.playing .icon,.shield.playing .msg{display:none}
.ctrl{position:absolute;left:0;right:0;bottom:0;z-index:3;display:flex;gap:8px;align-items:center;padding:10px 12px;background:linear-gradient(transparent,rgba(0,0,0,.8));color:#fff;font-size:.85rem}
.ctrl button{background:none;padding:6px 8px;font-size:1.25rem;line-height:1;border-radius:8px}
.ctrl button:hover{background:rgba(255,255,255,.2)}
.ctrl input{flex:1;margin:0;padding:0;border:0;width:auto;accent-color:var(--pink);background:none}
.prog{height:10px;background:var(--line);border-radius:99px;overflow:hidden;margin:6px 0 4px}
.prog div{height:100%;background:var(--pink);width:0;transition:width .3s}
.nav{display:flex;gap:10px;margin:16px 0}
.nav button{flex:1}
.nav .ghost{background:var(--card);color:var(--ink);border:1.5px solid var(--line)}
.lessons .done::before{content:"✓ ";color:var(--pink-dark)}
.help{width:100%;border-radius:12px;border:1.5px solid var(--line);margin:8px 0 18px;display:block}
.steps{margin:0 0 14px;padding-left:20px;color:var(--ink)}