:root{
  --brand:#e35d9c; --brand-d:#c23f7e; --brand-l:#fce8f1;
  --bg:#faf7f8; --panel:#fff; --ink:#33323a; --muted:#6b6570; --line:#ece7ea;
}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  background:var(--bg);color:var(--ink);line-height:1.55}
a{color:var(--brand-d)}
.wrap{max-width:960px;margin:0 auto;padding:0 20px}
header.top{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}
header.top .wrap{display:flex;align-items:center;gap:12px;height:96px}
.logo{display:inline-flex;align-items:center;font-weight:800;color:var(--brand-d);text-decoration:none;font-size:18px}
.logo img{height:64px;display:block}
.top .sp{flex:1}
footer.foot{border-top:1px solid var(--line);background:#fff;margin-top:40px}
footer.foot .wrap{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:20px 20px;color:var(--muted);font-size:13px}
footer.foot img{height:20px;opacity:.9}
footer.foot .sp{flex:1}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--brand);color:#fff;border:0;
  border-radius:10px;padding:11px 18px;font-size:15px;font-weight:600;cursor:pointer;text-decoration:none}
.btn:hover{background:var(--brand-d)}
.btn.ghost{background:#fff;color:var(--brand-d);border:1px solid var(--line)}
.btn.sm{padding:7px 12px;font-size:14px}
.hero{padding:48px 0 24px}
.hero h1{font-size:34px;margin:0 0 10px}
.hero p{font-size:18px;color:var(--muted);margin:0 0 22px;max-width:640px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:22px;margin:16px 0;box-shadow:0 1px 3px rgba(51,50,58,.04)}
.course:hover{box-shadow:0 4px 16px rgba(226,93,156,.14);transform:translateY(-2px);transition:.15s}
.cprog{margin-top:8px}
.cprog-bar{height:7px;background:var(--line);border-radius:6px;overflow:hidden;margin-bottom:5px}
.cprog-bar > i{display:block;height:100%;width:0;background:var(--brand);border-radius:6px}
.cprog span{font-size:12px;font-weight:600}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}
.course{display:flex;flex-direction:column;gap:6px;text-decoration:none;color:inherit}
.course h3{margin:0;font-size:18px;color:var(--brand-d)}
.course .meta{font-size:13px;color:var(--muted)}
.course .locked{font-size:12px;color:#a24a2c;font-weight:600}
label{display:block;font-size:13px;font-weight:600;color:var(--muted);margin:12px 0 4px}
input[type=email],input[type=text]{width:100%;border:1px solid var(--line);border-radius:10px;padding:11px 12px;font-size:16px}
.note{font-size:13px;color:var(--muted);margin:10px 0 0}
.err{color:#c0392b;font-size:14px;margin:10px 0 0;min-height:1em}
.center{max-width:420px;margin:40px auto}
.lessons{list-style:none;margin:0;padding:0}
.lessons li{border:1px solid var(--line);border-radius:10px;margin:8px 0;background:#fff}
.lessons button{width:100%;text-align:left;background:none;border:0;padding:13px 14px;font-size:15px;cursor:pointer;
  display:flex;align-items:center;gap:10px;color:var(--ink)}
.lessons button:hover{background:var(--brand-l)}
.lessons .n{width:26px;height:26px;flex:0 0 auto;border-radius:50%;background:var(--brand-l);color:var(--brand-d);
  display:inline-flex;align-items:center;justify-content:center;font-size:13px;font-weight:700}
.player{position:relative;aspect-ratio:16/9;background:#000;border-radius:12px;overflow:hidden;margin:14px 0}
.player iframe{width:100%;height:100%;border:0}
.player .ph{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:#cbd0d6;font-size:14px}
.cf-wm{position:absolute;top:8%;left:6%;color:rgba(255,255,255,.5);font-size:12px;pointer-events:none;
  text-shadow:0 1px 2px rgba(0,0,0,.6);transition:top 1s,left 1s;z-index:2}
.muted{color:var(--muted)}
.tag{display:inline-block;background:var(--brand-l);color:var(--brand-d);border-radius:999px;padding:3px 10px;font-size:12px;font-weight:600}

/* ---- two-column course player ---- */
.progress{display:flex;align-items:center;gap:12px;margin:0 0 16px}
.pbar{flex:1;height:8px;background:var(--line);border-radius:6px;overflow:hidden}
.pbar > i{display:block;height:100%;width:0;background:var(--brand);border-radius:6px;transition:width .3s}
.course-layout{display:grid;grid-template-columns:1fr 340px;gap:20px;align-items:start;padding-bottom:40px}
.course-main{min-width:0}
.lesson-bar{display:flex;align-items:center;gap:10px;margin-top:12px}
.course-side{position:sticky;top:112px;border:1px solid var(--line);border-radius:14px;background:#fff;overflow:hidden;max-height:calc(100vh - 130px);display:flex;flex-direction:column}
.side-head{padding:12px 14px;font-weight:700;font-size:14px;border-bottom:1px solid var(--line);background:#fbfafd}
.course-side #lessons{overflow:auto}
.side-sec{width:100%;display:flex;align-items:center;gap:8px;background:#fbfafd;border:0;border-top:1px solid var(--line);
  padding:11px 14px;font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);cursor:pointer}
.side-sec:hover{background:var(--brand-l);color:var(--brand-d)}
.side-sec .ss-t{flex:1;text-align:left}
.side-sec .caret{font-size:10px;width:10px}
.side-sec .ss-n{font-weight:600}
.side-lesson{width:100%;text-align:left;background:none;border:0;border-top:1px solid var(--line);padding:11px 14px;font-size:14px;cursor:pointer;display:flex;align-items:center;gap:10px;color:var(--ink)}
.side-lesson:hover{background:var(--brand-l)}
.side-lesson.active{background:var(--brand-l);box-shadow:inset 3px 0 0 var(--brand);font-weight:600}
.side-lesson:disabled{color:var(--muted);cursor:default}
.side-lesson .lt{flex:1}
.side-lesson .ck{width:22px;height:22px;flex:0 0 auto;border-radius:50%;background:var(--bg);color:var(--muted);border:1px solid var(--line);
  display:inline-flex;align-items:center;justify-content:center;font-size:12px;font-weight:700}
.side-lesson .ck.done{background:var(--brand);color:#fff;border-color:var(--brand)}
.side-res{display:block;border-top:1px solid var(--line);padding:10px 14px 10px 40px;font-size:13px;color:var(--brand-d);text-decoration:none;font-weight:600}
.side-res:hover{background:var(--brand-l)}
.ph-start{position:absolute;inset:0;width:100%;border:0;background:rgba(0,0,0,.35);color:#fff;font-size:16px;font-weight:600;cursor:pointer;padding:16px}
.ph-start:hover{background:rgba(0,0,0,.5)}
.sales-grid{display:grid;grid-template-columns:1fr 340px;gap:20px;align-items:start;padding-bottom:30px}
@media (max-width:820px){
  .course-layout{grid-template-columns:1fr}
  .course-side{position:static;max-height:none}
  .sales-grid{grid-template-columns:1fr}
  header.top .wrap{height:64px}
  .logo img{height:42px}
  .player{position:sticky;top:64px;z-index:5}
  .hero h1{font-size:26px}
  .side-lesson{padding:14px}
  .lesson-bar .btn{flex:1}
}
.res-card{border:1px solid var(--line);border-radius:12px;padding:14px 16px;margin-top:14px;background:#fff}
.res-card h3{margin:0 0 8px;font-size:15px}
.res-link{display:flex;align-items:center;gap:8px;padding:9px 12px;border:1px solid var(--line);border-radius:9px;margin:6px 0;
  text-decoration:none;color:var(--brand-d);font-weight:600;font-size:14px;background:var(--brand-l)}
.res-link:hover{background:#f9d9e8}
.q-block{margin:16px 0;padding-bottom:14px;border-bottom:1px solid var(--line)}
.q-prompt{font-weight:600;margin-bottom:8px}
.q-opt{display:flex;align-items:center;gap:10px;padding:9px 12px;border:1px solid var(--line);border-radius:9px;margin:6px 0;cursor:pointer}
.q-opt:hover{background:var(--brand-l)}
.q-opt input{margin:0}
.q-score{font-size:20px;font-weight:800;color:var(--brand-d);margin:16px 0 10px}
.q-res{padding:7px 0;font-size:14px}
.q-res.ok{color:#1f7a4d}
.q-res.bad{color:#c0392b}
.q-scale{display:flex;gap:8px}
.q-scaleopt{flex:1;display:flex;flex-direction:column;align-items:center;gap:6px;border:1px solid var(--line);border-radius:9px;padding:12px 6px;cursor:pointer;font-weight:600}
.q-scaleopt:hover{background:var(--brand-l)}
.q-scale-lbl{display:flex;justify-content:space-between;font-size:12px;color:var(--muted);margin-top:6px}

/* course cover images */
.course .cover{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:10px;background:var(--brand-l);display:block;margin-bottom:4px}
.course-hero-img{width:100%;max-height:280px;object-fit:cover;border-radius:14px;margin:0 0 8px}