/* Watch / player page (per kit/page-watch.html). Self-contained full-screen shell. */
html,body{height:100%;background:var(--page);}
.shell{position:fixed;inset:0;display:flex;flex-direction:column;}
.topbar{height:56px;flex:none;border-bottom:1px solid var(--line);background:#fff;display:flex;align-items:center;padding:0 12px;gap:8px;}
.topbar .ttl{font-weight:700;color:var(--ink);font-size:14px;margin-left:6px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.main{flex:1;display:flex;min-height:0;}
.col{flex:1;overflow-y:auto;min-width:0;}
.player{position:sticky;top:0;height:50vh;background:#070A16;display:flex;align-items:center;justify-content:center;z-index:5;}
.player iframe{width:100%;height:100%;border:0;display:block;}
.player .locked{color:#C7CBD6;text-align:center;padding:24px;max-width:420px;}
.player .locked .lk{width:56px;height:56px;border-radius:50%;background:rgba(255,255,255,.1);display:flex;align-items:center;justify-content:center;margin:0 auto 16px;color:#fff;}
.player .locked h2{color:#fff;font-size:20px;font-weight:800;margin:0 0 8px;}
.player .locked p{color:#9AA0AE;font-size:14px;margin:0 0 18px;line-height:1.6;}
.lesson{max-width:840px;margin:0 auto;padding:24px 22px 80px;}
.lesson .sec{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);}
.lesson h1{font-size:24px;font-weight:800;letter-spacing:-.02em;margin:6px 0 0;color:var(--ink);}
.lrow{display:flex;gap:12px;margin-top:18px;flex-wrap:wrap;}
.about{margin-top:28px;padding-top:24px;border-top:1px solid var(--line);}
.about h2{font-size:18px;font-weight:800;margin:0 0 10px;color:var(--ink);}
.about p{color:var(--body);line-height:1.8;margin:0;}

.side{width:0;flex:none;border-left:1px solid var(--line);background:#fff;overflow-y:auto;transition:width .2s;}
.side.open{width:330px;}
.side .sh{padding:15px 16px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:10px;position:sticky;top:0;background:#fff;font-weight:800;color:var(--ink);}
.side .mt{padding:14px 16px 8px;font-size:13px;font-weight:800;color:var(--ink);}
.side .it{width:100%;display:flex;align-items:center;gap:10px;padding:10px 16px;border:none;background:transparent;text-align:left;cursor:pointer;font-family:inherit;text-decoration:none;}
.side .it.on{background:var(--primary-sub);}
.side .it i{width:18px;height:18px;flex:none;}
.side .it .t{flex:1;font-size:13.5px;color:var(--body);}
.side .it.on .t{color:var(--primary-d);font-weight:700;}
.side .it .d{font-size:12px;color:var(--muted);font-family:var(--mono);}
@media(max-width:879px){.side.open{width:0;}.sidebtn{display:none;}}

/* "Free preview" pill on sidebar preview lessons (non-owners) */
.side .it .pvb{flex:none;font-size:10.5px;font-weight:800;color:var(--accent-d);background:var(--accent-bg);padding:2px 8px;border-radius:999px;white-space:nowrap;}

/* Completion checkboxes (owners): the sidebar's progress UI */
.side .it .cbx{width:16px;height:16px;flex:none;accent-color:var(--success);cursor:pointer;margin:0;}
.side .it a.t{text-decoration:none;color:var(--body);}
.side .it a.t:hover{color:var(--primary);}
.side .it.on a.t{color:var(--primary);font-weight:700;}
.side .it.done a.t{color:var(--muted);}

/* End-of-video overlay: Replay + Next lesson */
.player .endov{position:absolute;inset:0;z-index:6;background:rgba(7,10,22,.88);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;text-align:center;padding:24px;}
.player .endov[hidden]{display:none;}
.player .endov .upnext{font-size:12px;font-weight:800;letter-spacing:.14em;text-transform:uppercase;color:#A5A7F7;}
.player .endov .nt{font-size:clamp(17px,2.4vw,24px);font-weight:800;color:#fff;max-width:640px;line-height:1.3;}
.player .endov .row{display:flex;gap:12px;margin-top:18px;flex-wrap:wrap;justify-content:center;}
.btn-ghost-inv{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.25);}
.btn-ghost-inv:hover{background:rgba(255,255,255,.22);}