/* BTWW top navigation: transparent over the scene, channel-strip signature (v25 preview). */
.tn{position:relative;z-index:30;display:flex;align-items:center;justify-content:space-between;gap:24px;height:36px;pointer-events:auto;font-family:Arial,Helvetica,sans-serif;-webkit-font-smoothing:antialiased}
.tn::after{content:"";position:absolute;left:0;right:0;bottom:-8px;height:1px;background:linear-gradient(90deg,transparent,rgba(255,255,255,.10) 18%,rgba(255,255,255,.10) 82%,transparent);pointer-events:none}
.tn-brand{display:inline-flex;align-items:center;gap:10px;color:#fff;text-decoration:none;outline-offset:6px}
.tn-brand img{display:block;width:62px;height:auto}
.tn-brand span{font-size:9px;letter-spacing:.24em;text-transform:uppercase;color:rgba(255,255,255,.62);white-space:nowrap}
.tn-links{display:flex;align-items:center;gap:6px;margin:0;padding:0;list-style:none}
.tn-links a{position:relative;display:inline-flex;align-items:baseline;gap:9px;padding:10px 14px;color:rgba(255,255,255,.72);text-decoration:none;font-size:11px;letter-spacing:.16em;text-transform:uppercase;line-height:1;transition:color .25s ease;outline-offset:2px}
.tn-ch{font-size:8px;letter-spacing:.14em;color:rgba(255,255,255,.38);font-variant-numeric:tabular-nums}
/* cue LED: lit on the current channel */
.tn-led{position:relative;top:-1px;width:4px;height:4px;border-radius:50%;background:rgba(255,255,255,.16);box-shadow:inset 0 0 0 .5px rgba(255,255,255,.18);transition:background .3s ease,box-shadow .3s ease}
.tn-links a[aria-current="page"]{color:#fff}
.tn-links a[aria-current="page"] .tn-led{background:#ffb648;box-shadow:0 0 6px 1px rgba(255,170,60,.55)}
/* hairline fader indicator on hover/focus */
.tn-links a::after{content:"";position:absolute;left:14px;right:14px;bottom:4px;height:1px;background:#fff;transform:scaleX(0);transform-origin:50% 50%;transition:transform .35s cubic-bezier(.2,.7,.2,1)}
.tn-links a:hover,.tn-links a:focus-visible{color:#fff}
.tn-links a:hover::after,.tn-links a:focus-visible::after{transform:scaleX(1)}
.tn-menu{display:none;position:relative;width:40px;height:40px;margin-right:-8px;border:0;background:none;color:#fff;cursor:pointer;-webkit-tap-highlight-color:transparent}
.tn-menu i{position:absolute;left:11px;right:11px;height:1px;background:currentColor;transition:transform .35s cubic-bezier(.2,.7,.2,1)}
.tn-menu i:first-child{top:16px}.tn-menu i:last-child{top:23px}
.tn-menu[aria-expanded="true"] i:first-child{transform:translateY(3.5px) rotate(45deg)}
.tn-menu[aria-expanded="true"] i:last-child{transform:translateY(-3.5px) rotate(-45deg)}
/* legibility: a soft blur only once the page scrolls under it (about page) */
.tn.tn-solid{-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px)}
html.intro-pending .tn{opacity:0}
.tn{transition:opacity .9s ease .15s}
/* full-screen glass overlay (phones) */
.tn-over{position:fixed;inset:0;z-index:40;display:flex;flex-direction:column;justify-content:center;padding:96px 28px 40px;background:rgba(5,2,0,.62);-webkit-backdrop-filter:blur(26px) saturate(1.1);backdrop-filter:blur(26px) saturate(1.1);opacity:0;visibility:hidden;pointer-events:auto}
.tn-over.open{visibility:visible}
.tn-over ul{list-style:none;margin:0;padding:0}
.tn-over li{border-top:1px solid rgba(255,255,255,.10)}
.tn-over li:last-child{border-bottom:1px solid rgba(255,255,255,.10)}
.tn-over a{display:flex;align-items:center;gap:14px;padding:20px 2px;color:#fff;text-decoration:none;font-size:30px;letter-spacing:.04em;line-height:1}
.tn-over a .tn-ch{font-size:10px;width:30px}
.tn-over a .tn-led{width:5px;height:5px;margin-left:auto}
.tn-over a[aria-current="page"] .tn-led{background:#ffb648;box-shadow:0 0 8px 1px rgba(255,170,60,.6)}
.tn-over .tn-tag{margin:28px 0 0;color:rgba(255,255,255,.55);font-size:11px;letter-spacing:.14em;text-transform:uppercase;line-height:1.8}
.tn-over-top{position:absolute;top:18px;left:18px;right:18px;display:flex;justify-content:space-between;align-items:center}
html.tn-lock,html.tn-lock body{overflow:hidden}
@media(max-width:700px),(max-aspect-ratio:17/20){
 .tn{height:32px}
 .tn-links,.tn-brand span{display:none}
 .tn-menu{display:block}
 .tn::after{display:none}
 .tn-brand img{width:54px}
}
@media(prefers-reduced-motion:reduce){.tn-links a::after,.tn-menu i{transition:none}}
/* passage glide to room 2 */
.atmosphere,.page{transition:transform .62s cubic-bezier(.55,0,.35,1),opacity .62s ease,filter .62s ease}
html.tn-glide .atmosphere{transform:scale(1.14) translate3d(5%,0,0);filter:brightness(.35)}
html.tn-glide .page{opacity:0}
@media(prefers-reduced-motion:reduce){.atmosphere,.page{transition:none}}
.masthead>.tn{flex:1 1 auto;width:100%}.masthead{letter-spacing:normal;text-transform:none}
.masthead .tn::after{display:none}
.tn-over .tn-menu{display:block}
.tn-x i:first-child{transform:translateY(3.5px) rotate(45deg)}
.tn-x i:last-child{transform:translateY(-3.5px) rotate(-45deg)}
.tn-over-top .tn-brand img{width:54px}
/* v26: readable channel labels */
.tn-ch{font-size:9px;color:rgba(255,255,255,.58);letter-spacing:.16em}
.tn-links a{color:rgba(255,255,255,.82)}
.tn-led{width:5px;height:5px;background:rgba(255,255,255,.28)}