:root{
  --bg:#0d0f14; --bg2:#161a22; --bg3:#1e232e; --bg4:#262c3a;
  --line:#2a3140; --line2:#384153;
  --txt:#eef1f6; --txt2:#c4cbd8; --muted:#8b94a6; --dim:#5d6678;
  --accent:#6ea8fe; --accent-ink:#06101f;
  --cso:#3fb6a8; --mystika:#b07ce8;
  --radius:16px; --radius-sm:10px;
  --player-h:84px;
  --shadow:0 8px 30px rgba(0,0,0,.35);
}
.prog-cso{--accent:#3fb6a8}
.prog-mystika{--accent:#b07ce8}

*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
html,body{margin:0;padding:0}
body{background:var(--bg);color:var(--txt);
  font-family:Inter,system-ui,-apple-system,Segoe UI,Arial,sans-serif;
  font-size:15px;line-height:1.55;overflow-x:hidden}
a{color:inherit;text-decoration:none}
.muted{color:var(--muted)}
.hidden{display:none !important}
select,input,button{font-family:inherit}
::selection{background:color-mix(in srgb,var(--accent) 35%,transparent)}

/* ---------- topbar ---------- */
.topbar{display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:13px 16px;border-bottom:1px solid var(--line);
  background:rgba(13,15,20,.8);backdrop-filter:blur(12px);
  position:sticky;top:0;z-index:30}
.brand{display:flex;align-items:center;gap:9px;font-weight:700;font-size:16px;min-width:0;letter-spacing:.2px}
.brand span:last-child{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.logo{color:var(--accent);font-size:20px;flex:0 0 auto}
.back{color:var(--muted);font-weight:500;font-size:14px;white-space:nowrap}
.back:hover{color:var(--txt)}
.topbar-right{display:flex;align-items:center;gap:12px;min-width:0}
.user-chip{font-size:13px;color:var(--txt2);background:var(--bg3);border:1px solid var(--line);
  padding:4px 11px;border-radius:999px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:38vw}
.logout{font-size:13.5px;color:var(--muted);font-weight:500;white-space:nowrap}
.logout:hover{color:var(--accent)}

/* ---------- login ---------- */
.login-wrap{min-height:calc(100vh - 120px);display:grid;place-items:center;padding:20px}
.login-card{width:100%;max-width:380px;background:var(--bg2);border:1px solid var(--line);
  border-radius:var(--radius);padding:30px 26px;box-shadow:var(--shadow);display:flex;flex-direction:column}
.login-logo{font-size:34px;color:var(--accent);text-align:center;line-height:1}
.login-card h1{margin:14px 0 4px;font-size:22px;text-align:center;letter-spacing:-.3px}
.login-card>.muted{text-align:center;font-size:13.5px;margin:0 0 20px}
.login-card label{display:flex;flex-direction:column;gap:6px;font-size:13px;color:var(--muted);
  font-weight:600;margin-bottom:14px}
.login-card input{background:var(--bg);border:1px solid var(--line2);color:var(--txt);
  border-radius:10px;padding:11px 13px;font-size:15px;outline:none}
.login-card input:focus{border-color:var(--accent)}
.login-card button{margin-top:6px;background:var(--accent);color:var(--accent-ink);border:none;
  font-weight:700;font-size:15px;padding:12px;border-radius:10px;cursor:pointer}
.login-card button:hover{filter:brightness(1.05)}
.login-error{background:color-mix(in srgb,#e5484d 18%,var(--bg2));border:1px solid #e5484d;
  color:#ffd7d8;font-size:13.5px;padding:10px 12px;border-radius:10px;margin-bottom:16px}
.login-sep{display:flex;align-items:center;gap:12px;color:var(--dim);font-size:12.5px;margin:18px 0}
.login-sep::before,.login-sep::after{content:"";height:1px;background:var(--line);flex:1}
.login-domain{display:block;text-align:center;background:var(--bg3);border:1px solid var(--line2);
  color:var(--txt);font-weight:600;font-size:14.5px;padding:12px;border-radius:10px;transition:.12s}
.login-domain:hover{border-color:var(--accent);color:var(--txt)}
.container{max-width:1240px;margin:0 auto;padding:18px 16px}
@media(min-width:640px){.topbar{padding:14px 28px}.brand{font-size:17px}.logo{font-size:22px}.container{padding:28px}}

/* ---------- index ---------- */
.program{margin-bottom:34px}
.program-head{display:flex;align-items:baseline;gap:12px;margin:0 0 16px;padding-bottom:12px;
  border-bottom:1px solid var(--line)}
.program-head h1{margin:0;font-size:22px;letter-spacing:-.3px}
.cards{display:grid;grid-template-columns:1fr;gap:14px}
.card{position:relative;overflow:hidden;background:var(--bg2);border:1px solid var(--line);
  border-radius:var(--radius);padding:18px 18px 16px;transition:transform .15s,border-color .15s,background .15s;display:block}
.card::before{content:"";position:absolute;inset:0 auto 0 0;width:4px;background:var(--bar,var(--accent));opacity:.85}
.card.cso{--bar:var(--cso)} .card.mystika{--bar:var(--mystika)}
.card:hover{transform:translateY(-3px);border-color:var(--line2);background:var(--bg3)}
.card:active{transform:translateY(-1px)}
.card h3{margin:12px 0 14px;font-size:16.5px;line-height:1.35;letter-spacing:-.2px}
.card-meta{display:flex;flex-wrap:wrap;gap:8px}
.chip{display:inline-flex;align-items:center;gap:5px;background:var(--bg4);color:var(--txt2);
  font-size:12.5px;padding:5px 11px;border-radius:999px}
.badge{display:inline-block;font-size:11.5px;font-weight:700;letter-spacing:.4px;text-transform:uppercase;
  padding:4px 11px;border-radius:999px;color:#fff}
.badge.cso{background:var(--cso)} .badge.mystika{background:var(--mystika)}
.empty{text-align:center;padding:64px 16px}
@media(min-width:640px){
  .program{margin-bottom:44px}.program-head h1{font-size:25px}
  .cards{grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}
}

/* ---------- course layout ---------- */
.course-page{padding-bottom:calc(var(--player-h) + 20px)}
.course-grid{display:flex;flex-direction:column;gap:16px}
.stage{order:1;min-width:0}
.chapters{order:2}

/* chapters (TOC) */
.chapters{background:var(--bg2);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.course-title{padding:16px 16px 14px;border-bottom:1px solid var(--line)}
.course-title h2{margin:10px 0 6px;font-size:17px;line-height:1.3;letter-spacing:-.2px}
.part-list{list-style:none;margin:0;padding:8px;max-height:46vh;overflow:auto}
.part-item{display:flex;gap:12px;align-items:center;padding:11px 12px;border-radius:var(--radius-sm);
  cursor:pointer;transition:background .12s}
.part-item:hover,.part-item:active{background:var(--bg3)}
.part-item.active{background:color-mix(in srgb,var(--accent) 14%,transparent)}
.part-item.active .part-num{background:var(--accent);color:var(--accent-ink);border-color:transparent}
.part-num{flex:0 0 27px;height:27px;border-radius:50%;background:var(--bg3);border:1px solid var(--line2);
  color:var(--muted);display:grid;place-items:center;font-size:13px;font-weight:700}
.part-info{display:flex;flex-direction:column;gap:2px;min-width:0}
.part-title{font-size:14px;font-weight:500;line-height:1.35}
.part-dur{font-size:12px;color:var(--muted)}

/* chapters toggle (mobile) */
.chapters-toggle{display:flex;align-items:center;gap:8px;width:100%;justify-content:center;
  background:var(--bg2);border:1px solid var(--line);color:var(--txt);font-weight:600;font-size:14px;
  padding:12px;border-radius:var(--radius-sm);cursor:pointer;margin-bottom:4px}
.chapters-toggle .ct-icon{color:var(--accent)}
.backdrop{display:none;position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:38}

/* ---------- slide stage ---------- */
.slide-stage{background:var(--bg2);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;display:flex;flex-direction:column}
.slide-img-wrap{position:relative;width:100%;aspect-ratio:16/9;background:#000;
  display:grid;place-items:center}
.slide-img-wrap img{width:100%;height:100%;object-fit:contain;display:block}
.slide-stage.empty .slide-img-wrap{display:none}
.slide-zoom{position:absolute;top:10px;right:10px;width:34px;height:34px;border-radius:9px;
  background:rgba(0,0,0,.55);border:1px solid rgba(255,255,255,.18);color:#fff;font-size:15px;
  cursor:pointer;backdrop-filter:blur(4px)}
.slide-zoom:hover{background:rgba(0,0,0,.75)}
.slide-meta{padding:13px 16px}
.slide-label{font-size:11px;font-weight:700;letter-spacing:.6px;text-transform:uppercase;
  color:var(--accent);margin-bottom:4px}
.slide-stage.empty .slide-label{color:var(--dim)}
.slide-caption{font-size:14px;color:var(--txt2);line-height:1.55}
.slide-stage.empty .slide-caption{color:var(--muted)}

/* ---------- tabs ---------- */
.tabs{display:flex;gap:4px;margin-top:18px;border-bottom:1px solid var(--line);
  overflow-x:auto;-webkit-overflow-scrolling:touch}
.tab{background:none;border:none;color:var(--muted);padding:11px 14px;cursor:pointer;
  font-size:14px;font-weight:600;border-bottom:2px solid transparent;white-space:nowrap;
  margin-bottom:-1px;transition:color .12s}
.tab:hover{color:var(--txt2)}
.tab.active{color:var(--txt);border-bottom-color:var(--accent)}
.tab-wrap{position:relative}
.tab-panel{padding:16px 2px}

/* ---------- transcript (karaoke) ---------- */
.transcript{display:flex;flex-direction:column}
.transcript .seg{display:flex;gap:14px;padding:10px 12px;border-radius:var(--radius-sm);
  cursor:pointer;transition:background .12s,opacity .2s;border-left:2px solid transparent}
.transcript .seg:hover{background:var(--bg2)}
.transcript .seg .seg-text{color:var(--txt2);transition:color .2s}
.transcript .seg.active{background:color-mix(in srgb,var(--accent) 10%,transparent);
  border-left-color:var(--accent)}
.transcript .seg.active .seg-text{color:var(--txt);font-weight:500}
.seg-time{flex:0 0 50px;color:var(--accent);font-size:12px;font-variant-numeric:tabular-nums;padding-top:3px;opacity:.85}
.seg-body{min-width:0}
.seg-speaker{font-size:11.5px;font-weight:700;color:var(--accent2,#9a86f0);margin-bottom:3px;letter-spacing:.2px}
.prog-cso .seg-speaker{color:#5fcabc}.prog-mystika .seg-speaker{color:#c79bf0}
.seg-text{font-size:15.5px;line-height:1.6}

/* inline slide in transcript */
.inline-slide{margin:14px 0 14px 64px;border-radius:var(--radius-sm);overflow:hidden;
  border:1px solid var(--line);background:var(--bg2);max-width:440px;cursor:pointer;transition:border-color .15s}
.inline-slide:hover{border-color:var(--line2)}
.inline-slide.active{border-color:var(--accent)}
.inline-slide img{width:100%;display:block}
.inline-slide-cap{padding:9px 12px;font-size:13px;color:var(--muted);line-height:1.5}

/* ---------- outline ---------- */
.outline .topic{display:flex;gap:14px;padding:11px 12px;border-radius:var(--radius-sm);cursor:pointer;transition:background .12s}
.outline .topic:hover{background:var(--bg2)}
.outline .t-time{color:var(--accent);font-size:12px;flex:0 0 50px;font-variant-numeric:tabular-nums;padding-top:1px}
.outline .t-text{font-size:14.5px;color:var(--txt2)}

/* ---------- photos gallery ---------- */
.photos{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:10px}
.photos a{position:relative;display:block;border-radius:var(--radius-sm);overflow:hidden;border:1px solid var(--line)}
.photos a:hover{border-color:var(--line2)}
.photos img{width:100%;aspect-ratio:16/9;object-fit:cover;background:var(--bg3);display:block}
.photos .photo-time{position:absolute;bottom:6px;right:6px;background:rgba(0,0,0,.7);
  color:#fff;font-size:11px;padding:2px 7px;border-radius:999px;font-variant-numeric:tabular-nums}

/* ---------- follow button ---------- */
.follow-btn{position:fixed;left:50%;transform:translateX(-50%);
  bottom:calc(var(--player-h) + 16px);z-index:25;
  background:var(--accent);color:var(--accent-ink);border:none;font-weight:700;font-size:13.5px;
  padding:10px 18px;border-radius:999px;cursor:pointer;box-shadow:var(--shadow);animation:pop .2s ease}
@keyframes pop{from{transform:translate(-50%,8px);opacity:0}to{transform:translate(-50%,0);opacity:1}}

/* ---------- (1) hledání v přepisu ---------- */
.search-bar{position:sticky;top:0;z-index:5;display:flex;align-items:center;gap:8px;
  background:var(--bg);padding:8px 0 10px;margin-bottom:2px}
.search-ico{color:var(--muted);font-size:14px;flex:0 0 auto;padding-left:2px}
#tx-search{flex:1;min-width:0;background:var(--bg2);border:1px solid var(--line2);color:var(--txt);
  border-radius:999px;padding:9px 14px;font-size:14px;outline:none}
#tx-search:focus{border-color:var(--accent)}
.search-count{font-size:12.5px;color:var(--muted);flex:0 0 auto;font-variant-numeric:tabular-nums;min-width:42px;text-align:right}
.search-nav{flex:0 0 auto;width:34px;height:34px;border-radius:9px;background:var(--bg3);
  border:1px solid var(--line2);color:var(--txt);cursor:pointer;font-size:14px}
.search-nav:hover:not(:disabled){border-color:var(--accent)}
.search-nav:disabled{opacity:.4;cursor:default}
.seg mark{background:color-mix(in srgb,var(--accent) 45%,transparent);color:var(--txt);border-radius:3px;padding:0 1px}
.transcript .seg.search-current{background:color-mix(in srgb,var(--accent) 22%,transparent);
  box-shadow:0 0 0 1px var(--accent) inset}

/* ---------- (2) zapamatování pozice ---------- */
.resume-banner{display:flex;align-items:center;gap:12px;background:color-mix(in srgb,var(--accent) 16%,var(--bg2));
  border:1px solid color-mix(in srgb,var(--accent) 45%,var(--line));border-radius:var(--radius);
  padding:12px 14px;margin-bottom:14px}
.rb-ico{font-size:18px;color:var(--accent);flex:0 0 auto}
.rb-text{flex:1;min-width:0;font-size:14px;color:var(--txt2)}
.rb-go{flex:0 0 auto;background:var(--accent);color:var(--accent-ink);border:none;font-weight:700;
  font-size:13.5px;padding:9px 16px;border-radius:999px;cursor:pointer}
.rb-x{flex:0 0 auto;background:none;border:none;color:var(--muted);font-size:20px;cursor:pointer;
  line-height:1;padding:0 4px}
.rb-x:hover{color:var(--txt)}

/* ---------- (3) filmstrip ---------- */
.filmstrip-toggle{margin-top:10px;background:var(--bg3);border:1px solid var(--line2);color:var(--txt2);
  font-size:12.5px;font-weight:600;padding:7px 12px;border-radius:999px;cursor:pointer;align-self:flex-start}
.filmstrip-toggle:hover{border-color:var(--accent);color:var(--txt)}
.filmstrip{display:flex;gap:8px;overflow-x:auto;padding:12px;margin-top:10px;
  background:var(--bg2);border:1px solid var(--line);border-radius:var(--radius);scroll-behavior:smooth}
.filmstrip img{height:74px;width:auto;border-radius:8px;border:2px solid transparent;cursor:pointer;
  flex:0 0 auto;background:var(--bg3);transition:border-color .12s,transform .12s}
.filmstrip img:hover{transform:translateY(-2px)}
.filmstrip img.current{border-color:var(--accent)}

/* ---------- player bar ---------- */
.player-bar{position:fixed;left:0;right:0;bottom:0;z-index:40;height:var(--player-h);
  background:rgba(18,21,28,.92);backdrop-filter:blur(16px);border-top:1px solid var(--line2)}
.player-inner{max-width:1240px;margin:0 auto;height:100%;display:flex;align-items:center;gap:14px;padding:0 16px}
.pb-slide{flex:0 0 auto;height:52px;width:92px;object-fit:cover;border-radius:9px;
  border:1px solid var(--line2);background:var(--bg3);cursor:pointer}
.pb-controls{display:flex;align-items:center;gap:8px;flex:0 0 auto}
.pb-btn{background:var(--bg3);border:1px solid var(--line2);color:var(--txt);border-radius:999px;
  height:40px;padding:0 12px;font-size:13px;font-weight:600;cursor:pointer;transition:.12s;
  font-variant-numeric:tabular-nums}
.pb-btn:hover{border-color:var(--accent)}
.pb-btn:active{background:var(--accent);color:var(--accent-ink)}
.pb-play{width:48px;height:48px;padding:0;font-size:18px;background:var(--accent);
  color:var(--accent-ink);border:none;display:grid;place-items:center}
.pb-main{flex:1;min-width:0;display:flex;flex-direction:column;gap:7px}
.pb-meta{display:flex;justify-content:space-between;align-items:baseline;gap:12px;font-size:12.5px}
.pb-chapter{color:var(--txt2);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-weight:500}
.pb-time{color:var(--muted);flex:0 0 auto;font-variant-numeric:tabular-nums}
.pb-speed{background:var(--bg3);color:var(--txt);border:1px solid var(--line2);border-radius:9px;
  padding:9px 7px;font-size:13px;cursor:pointer;flex:0 0 auto}

/* custom scrubber */
.scrub{padding:6px 0;cursor:pointer;touch-action:none}
.scrub-track{position:relative;height:6px;background:var(--bg4);border-radius:999px}
.scrub-fill{position:absolute;left:0;top:0;bottom:0;width:0;background:var(--accent);border-radius:999px}
.scrub-ticks{position:absolute;inset:0;pointer-events:none}
.scrub-tick{position:absolute;top:50%;transform:translate(-50%,-50%);width:2px;height:10px;
  background:var(--line2);border-radius:1px}
.scrub-thumb{position:absolute;top:50%;left:0;transform:translate(-50%,-50%);width:14px;height:14px;
  border-radius:50%;background:#fff;box-shadow:0 1px 4px rgba(0,0,0,.5);opacity:0;transition:opacity .12s}
.scrub:hover .scrub-thumb,.scrub.dragging .scrub-thumb{opacity:1}

/* ---------- desktop ---------- */
@media(min-width:900px){
  :root{--player-h:78px}
  .course-page{padding-bottom:calc(var(--player-h) + 28px)}
  .chapters-toggle{display:none}
  .course-grid{display:grid;grid-template-columns:320px 1fr;gap:24px;align-items:start}
  .chapters{order:0;position:sticky;top:88px;max-height:calc(100vh - 108px - var(--player-h));display:flex;flex-direction:column}
  .part-list{max-height:none;flex:1}
  .stage{order:0}
  .slide-stage{flex-direction:row;align-items:stretch}
  .slide-img-wrap{flex:0 0 46%;aspect-ratio:16/9}
  .slide-meta{flex:1;display:flex;flex-direction:column;justify-content:center;padding:18px 20px}
  .slide-caption{font-size:14.5px}
  .pb-btn{height:42px}
}

/* mobile chapters drawer */
@media(max-width:899px){
  .chapters{position:fixed;top:0;bottom:0;left:0;width:min(330px,86vw);z-index:39;
    border-radius:0;transform:translateX(-100%);transition:transform .22s ease;
    max-height:none;overflow:auto;box-shadow:var(--shadow)}
  .chapters.open{transform:translateX(0)}
  .backdrop.show{display:block}
  .part-list{max-height:none}
}

/* na úzkém mobilu skrýt mini-slide v liště (místo) */
@media(max-width:600px){
  .pb-slide{display:none !important}
  .filmstrip img{height:60px}
}