*{box-sizing:border-box}html{overflow-x:hidden;-webkit-text-size-adjust:100%;scroll-behavior:smooth}body{margin:0;overflow-x:hidden;background:var(--page);color:var(--navy);font:16px/1.5 var(--font-body)}button,input,select,textarea{font:inherit}button,a,input,select,textarea,summary{-webkit-tap-highlight-color:transparent}a{color:var(--navy);font-weight:700}button,.button,.file-button{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:44px;border:2px solid var(--navy);border-radius:7px;padding:8px 12px;background:var(--card);color:var(--navy);font-weight:700;text-decoration:none;cursor:pointer;line-height:1.2}button:hover,.button:hover,.file-button:hover{background:var(--columbia-tint)}button:active{transform:translateY(1px)}button:disabled{opacity:.5;cursor:not-allowed}button.primary,.primary{background:var(--gold);color:var(--navy)}button[aria-pressed=true]{background:var(--navy);color:var(--cream)}:focus-visible{outline:3px solid var(--navy);outline-offset:3px}input[type=range]{accent-color:var(--navy);width:100%;min-width:0;min-height:44px;margin:0;cursor:pointer}input[type=checkbox]{width:20px;height:20px;accent-color:var(--navy);flex:none}select,textarea,input[type=text]{background:var(--card);color:var(--navy);border:2px solid var(--navy);border-radius:6px;padding:8px;max-width:100%;min-width:0;min-height:44px}textarea{resize:vertical;width:100%;display:block}label{font-weight:700}h1,h2,h3,p{margin:0}p+p{margin-top:8px}[hidden]{display:none!important}
.masthead{background:radial-gradient(90% 55% at 50% 8%,rgba(133,198,242,.22),transparent 60%),radial-gradient(85% 65% at 10% 115%,rgba(255,197,47,.10),transparent 60%),linear-gradient(180deg,var(--navy),var(--navy-deep));color:var(--cream);padding:10px 16px 19px;text-align:center;border-bottom:4px solid var(--gold)}.mast-nav{display:flex;justify-content:space-between;gap:12px;max-width:1120px;margin:0 auto 3px}.mast-nav a{color:var(--cream);min-height:44px;display:flex;align-items:center;font-size:16px}.mast-nav a:focus-visible{outline-color:var(--gold)}.mast-title{font-family:var(--font-display);font-weight:800;font-size:clamp(28px,8.6vw,40px);line-height:1.08;letter-spacing:.06em;text-transform:uppercase;color:var(--card)}.mast-sub{font-family:var(--font-display);font-weight:700;font-size:18px;letter-spacing:.24em;color:var(--gold);margin-top:4px;text-transform:uppercase}.mast-meta{font-size:16px;color:var(--cream);margin-top:6px}.app{max-width:1200px;margin:18px auto 30px;padding:0 12px;display:grid;gap:16px;align-items:start}.acc{background:var(--card);border:2px solid var(--navy);border-radius:9px;overflow:hidden;box-shadow:0 2px 8px rgba(10,35,81,.06);min-width:0}.acc-head{list-style:none;display:flex;align-items:center;gap:11px;padding:12px 14px;background:var(--cream);min-width:0}.acc-head::-webkit-details-marker{display:none}summary.acc-head{cursor:pointer;min-height:68px}summary:hover{background:var(--columbia-tint)}.acc-num{flex:none;width:36px;height:36px;border-radius:9px;background:var(--navy);color:var(--gold);display:flex;align-items:center;justify-content:center;font:700 16px var(--font-mono);border:2px solid var(--navy)}.hero .acc-num,.notes .acc-num{background:var(--gold);color:var(--navy)}.acc-title{font-family:var(--font-display);font-weight:800;font-size:19px;letter-spacing:.025em;color:var(--navy);text-transform:uppercase;line-height:1.2;flex:1;min-width:0}.acc-title:after{display:block;content:"";width:44px;height:3px;background:var(--gold);margin-top:5px;border-radius:2px}.count{font:700 14px var(--font-mono)}.chevron{font-size:22px;font-weight:700;flex:none;transition:transform .2s}details[open]>.acc-head .chevron{transform:rotate(180deg)}.acc-body{padding:14px;border-top:2px solid var(--navy)}.media-title{padding:12px 14px;border-top:2px solid var(--navy)}.media-title h3{font-size:21px;line-height:1.25}.media-title p{font-size:16px;color:var(--slate);margin-top:4px}.media-frame{position:relative;aspect-ratio:16/9;min-height:200px;background:var(--navy-deep);isolation:isolate}.media-frame:fullscreen{width:100vw;height:100vh;aspect-ratio:auto}.media-frame video,.media-frame iframe,#provider-host{display:block;width:100%;height:100%;border:0}.media-frame video{object-fit:contain}.media-frame #provider-host{position:absolute;inset:0}.controls{padding:10px 12px 0}.timeline{display:grid;grid-template-columns:43px minmax(0,1fr) 43px;align-items:center;gap:8px}.timeline output{font:700 14px var(--font-mono)}.timeline output:last-child{text-align:right}.transport{display:grid;grid-template-columns:repeat(3,minmax(0,1fr)) minmax(50px,1.3fr) repeat(3,minmax(0,1fr));gap:4px}.transport button{padding:7px 0;font-size:14px;gap:1px}.transport #reverse,.transport #forward{flex-direction:column;font-size:23px;line-height:.75}.transport button span{font-size:12px;line-height:1}.settings{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px;margin-top:12px;align-items:center}.sound{grid-column:1/-1;display:grid;grid-template-columns:auto minmax(0,1fr) 42px;align-items:center;gap:10px;font-size:14px;letter-spacing:.04em}.sound output{font-family:var(--font-mono);font-size:14px;text-align:right}.speed{display:flex;align-items:center;gap:8px;min-width:0}.settings select{min-width:82px}.up-next{margin-top:12px;padding:8px 0;display:grid;grid-template-columns:minmax(0,1fr) auto auto;align-items:center;gap:8px;border-top:2px solid var(--navy);border-bottom:2px solid var(--navy);font-size:14px}.up-next>span{display:grid;min-width:0;line-height:1.3}.up-next strong{font-size:11px;letter-spacing:.06em}.up-next #up-next-title{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-weight:700}.up-next button{min-height:44px;padding:6px 10px;font-size:14px}.auto{display:flex;align-items:center;gap:4px;min-height:44px}.chapter-line{display:grid;grid-template-columns:auto minmax(0,1fr);gap:10px;align-items:center;margin-top:12px}.chapter-line label{font-size:16px}.actions{display:grid;grid-template-columns:1fr 1fr 1.35fr;gap:6px;margin-top:10px}.actions button{font-size:14px;padding:8px 5px}.actions svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linejoin:round;flex:none}.status{margin:10px 0 0;padding:8px 0 10px;font-size:14px;min-height:38px;color:var(--slate);overflow-wrap:anywhere}.status.error{color:var(--red);font-weight:700}.hint{color:var(--slate);font-size:16px;line-height:1.45;margin-bottom:10px}.side{display:grid;gap:16px;min-width:0}.playlist-items{list-style:none;padding:0;margin:0;border-top:2px solid var(--navy)}.playlist-items li+li{border-top:1px solid var(--line-strong)}.playlist-items button{border:0;border-radius:0;width:100%;justify-content:start;text-align:left;padding:11px 14px;min-height:59px;font-weight:400;gap:10px}.playlist-items li:nth-child(even) button{background:var(--columbia-tint)}.playlist-items button[aria-current=true]{box-shadow:inset 5px 0 var(--gold);background:var(--navy);color:var(--cream)}.playlist-number{font:700 14px var(--font-mono);width:24px;flex:none}.playlist-text{flex:1;min-width:0;display:grid}.playlist-text strong{font-size:16px;line-height:1.3}.playlist-text small{font-size:14px;line-height:1.35}.mark{width:100%;background:var(--columbia-tint);margin-bottom:12px}#note-form>label{display:block;margin-bottom:5px}.note-buttons{display:flex;gap:8px;flex-wrap:wrap;margin-top:8px}.note-buttons button{flex:1;font-size:15px}.note-list{list-style:none;padding:0;margin:14px 0}.note-list li{border-top:2px solid var(--navy);padding:10px 0}.note-list p{white-space:pre-wrap;overflow-wrap:anywhere;margin:6px 0}.note-meta{display:flex;gap:6px;align-items:center;flex-wrap:wrap}.note-meta button{font-size:14px;padding:6px 10px}.note-meta .stamp{background:var(--columbia-tint);margin-right:auto}.note-meta span{font-size:14px;font-weight:700;margin-right:auto}.transfer{display:flex;gap:8px;margin-bottom:10px}.transfer>*{flex:1;font-size:15px;padding:8px}.file-button{position:relative;overflow:hidden}.file-button input{position:absolute;inset:0;opacity:0;width:100%;cursor:pointer}.file-button:focus-within{outline:3px solid var(--navy);outline-offset:3px}.briefing p{margin-bottom:12px}.briefing .button{width:100%}.appfoot{padding:22px 12px;text-align:center;background:var(--navy-deep);border-top:3px solid var(--gold);color:var(--cream);font-size:16px}#copy-fallback{width:100%;margin-top:8px}.quiz-main{max-width:760px}.quiz-form{display:grid;gap:16px}.quiz-form fieldset{min-width:0;margin:0;background:var(--card);padding:16px;border:2px solid var(--navy);border-radius:9px}.quiz-form legend{font-size:18px;font-weight:700;background:var(--cream);padding:0 6px}.quiz-form label{display:flex;align-items:center;gap:9px;min-height:44px;font-weight:400}.quiz-form input{width:20px;height:20px;accent-color:var(--navy);flex:none}.quiz-actions{display:flex;gap:12px;flex-wrap:wrap}.quiz-status{background:var(--cream);padding:14px;border:2px solid var(--navy);border-radius:8px;min-height:56px}
@media(min-width:760px){.app{grid-template-columns:minmax(0,1.65fr) minmax(300px,1fr);padding:0 18px;gap:20px}.masthead{padding-bottom:22px}.mast-title{font-size:40px}.controls{padding:12px 16px 0}.settings{grid-template-columns:minmax(0,1fr) auto auto}.sound{grid-column:auto;gap:6px;font-size:12px}.settings .speed>span{display:none}.settings #fullscreen{font-size:14px}.media-frame{min-height:240px}.transport button{font-size:16px;min-height:48px}.playlist-items button{padding:9px 14px}.acc-head{padding:12px 14px}.quiz-main{display:block}.quiz-form{margin-top:16px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important}}

/* Visual polish: existing geometry, copy, controls and behavior are retained. */
:root{
  --control-edge:#173e70;
  --control-light:#d5eafa;
  --control-ice:#8bd5f1;
  --control-shadow:rgba(6,24,56,.18);
}
button,.button,.file-button{
  border-radius:5px;
  border-color:#173e70;
  background:linear-gradient(180deg,#fff 0%,#f5f9fd 100%);
  box-shadow:inset 0 1px 0 #fff,0 2px 0 rgba(10,35,81,.10);
  transition:background .14s ease,border-color .14s ease,box-shadow .14s ease,transform .14s ease;
}
button:hover,.button:hover,.file-button:hover{
  background:linear-gradient(180deg,#f7fcff,#e8f3fb);
  border-color:#39799b;
  box-shadow:inset 0 1px 0 #fff,0 0 0 1px rgba(120,180,214,.2),0 3px 8px rgba(10,35,81,.12);
}
button:active,.button:active,.file-button:active{
  box-shadow:inset 0 2px 4px rgba(6,24,56,.16);
  transform:translateY(1px);
}
button.primary,.primary{
  background:linear-gradient(180deg,#ffdf74 0%,#ffcc43 32%,#ffc52f 70%,#f2b516 100%);
  border-color:#8b6311;
  color:var(--navy-deep);
  box-shadow:inset 0 1px 0 #fff0b0,inset 0 -1px 0 rgba(139,99,17,.25),0 2px 0 rgba(6,24,56,.2),0 3px 10px rgba(255,197,47,.16);
}
button.primary:hover,.primary:hover{
  background:linear-gradient(180deg,#ffedab,#ffda61 35%,#ffc936);
  border-color:#a67911;
  box-shadow:inset 0 1px 0 #fff7d5,0 0 0 1px rgba(255,197,47,.28),0 4px 12px rgba(139,99,17,.2);
}
.transport button:not(.primary),#fullscreen,#captions,#play-next{
  background:linear-gradient(180deg,#234e7c 0%,#14355d 46%,#0b2349 100%);
  border-color:#092145;
  color:#f3f8ff;
  text-shadow:0 1px 1px rgba(0,0,0,.3);
  box-shadow:inset 0 1px 0 rgba(160,214,245,.52),inset 0 -1px 0 rgba(0,0,0,.22),0 2px 0 rgba(6,24,56,.18);
}
.transport button:not(.primary):hover,#fullscreen:hover,#captions:hover,#play-next:hover{
  background:linear-gradient(180deg,#2d6594,#1a416d 50%,#0d2b53);
  border-color:#397b9d;
  box-shadow:inset 0 1px 0 rgba(189,237,255,.78),0 0 0 1px rgba(120,180,214,.25),0 3px 9px rgba(10,35,81,.25);
}
button:disabled,.transport button:disabled,#play-next:disabled{
  opacity:1;
  color:#62738b;
  background:linear-gradient(180deg,#f1f4f8,#e6ecf3);
  border-color:#bdcad9;
  text-shadow:none;
  box-shadow:inset 0 1px 0 #fff;
  transform:none;
}
button[aria-pressed=true]{
  color:#f5f9ff;
  background:linear-gradient(180deg,#24527e,#0a2351);
  border-color:#0a2351;
  box-shadow:inset 0 2px 0 var(--control-ice),inset 0 1px 8px rgba(120,180,214,.18);
}
:focus-visible{outline:3px solid #32779a;outline-offset:3px}
button.primary:focus-visible{outline-color:var(--navy)}
.file-button:focus-within{outline:3px solid #32779a;outline-offset:3px}
.acc{border-radius:6px;box-shadow:0 2px 2px rgba(6,24,56,.07),0 7px 18px rgba(6,24,56,.06)}
.acc-head{background:linear-gradient(180deg,#fff9e9,var(--cream));box-shadow:inset 0 1px 0 rgba(255,255,255,.92)}
summary.acc-head:hover{background:linear-gradient(180deg,#f5faff,#e8f1f8)}
.acc-num{border-radius:5px;box-shadow:inset 0 1px 0 rgba(160,214,245,.52),0 1px 0 rgba(6,24,56,.12)}
.hero .acc-num,.notes .acc-num{background:linear-gradient(160deg,#ffdf74,var(--gold));box-shadow:inset 0 1px 0 #fff0b0,0 1px 0 rgba(6,24,56,.12)}
.acc-title:after{border-radius:0;background:linear-gradient(90deg,var(--gold) 0%,var(--gold) 72%,#e6ad1b 100%)}
.media-frame{box-shadow:inset 0 0 0 1px rgba(120,180,214,.2)}
.timeline output{font-variant-numeric:tabular-nums;letter-spacing:-.03em}
select,textarea,input[type=text]{
  border-radius:5px;
  border-color:#7d94af;
  background:linear-gradient(180deg,#f7fafd 0%,#fff 16px);
  box-shadow:inset 0 1px 2px rgba(6,24,56,.07);
}
select:hover,textarea:hover,input[type=text]:hover{border-color:#426b91}
.mark{background:linear-gradient(180deg,#f6fbff,#e5f0f8);box-shadow:inset 0 1px 0 #fff,inset 3px 0 0 #78b4d6,0 2px 0 rgba(10,35,81,.08)}
.playlist-items button,.playlist-items button:hover{
  border-radius:0;
  text-shadow:none;
  box-shadow:none;
}
.playlist-items li button[aria-current=true]{
  background:linear-gradient(110deg,#1d4674,#0a2351 75%);
  color:#fff7df;
  box-shadow:inset 4px 0 var(--gold),inset 0 1px 0 rgba(166,217,247,.3);
}
.playlist-items li button[aria-current=true] .playlist-number{color:var(--gold)}
.playlist-items li button[aria-current=true] small{color:#d9e7f4}
.playlist-items li button:not([aria-current=true]):hover{background:#dcecf7}
.quiz-form fieldset,.quiz-status{border-radius:6px}
@media(prefers-reduced-motion:reduce){
  button,.button,.file-button{transition:none;transform:none}
}

/* Punchlist completion: smooth time feedback, richer jumps and separate note starts. */
.seek-track{position:relative;min-width:0}.timeline{padding-top:15px}.seek-preview{position:absolute;top:-14px;left:24px;transform:translateX(-50%);background:var(--gold);color:var(--navy);border:1px solid var(--navy);border-radius:4px;padding:1px 4px;white-space:nowrap;pointer-events:none;font:700 12px/1.3 var(--font-mono);box-shadow:0 2px 5px rgba(6,24,56,.16);transition:left .12s linear}.seek-track:has(input:active) .seek-preview{transition:none}.note-start{display:flex;gap:8px;margin-bottom:12px}.note-start button{flex:1;margin:0}.media-frame{width:100%;min-width:0}
@media(max-width:360px){.transport{display:flex;flex-wrap:wrap}.transport button{flex:1 0 44px}.transport #play{flex-basis:54px}}
@media(prefers-reduced-motion:reduce){.seek-preview{transition:none}}

/* The released YouTube view uses the app's custom transport and starts with CC off. */
.media-frame iframe{pointer-events:none}
.settings{grid-template-columns:minmax(0,1fr) auto auto}
@media(min-width:760px){.settings{grid-template-columns:minmax(0,1fr) auto auto auto}}