/* Main header: the router panel. Shared by the homepage, the channel pages, Studio Notes and How we use AI.
   The markup comes from journal/partials/nav.html (node journal/nav.mjs writes it into hand-made pages).
   Keep backdrop-filter and transform off .top while the phone menu is open: either one traps the fixed channel list
   inside the 60px header (it did on 5 Oct 2026). */
.top{position:sticky;top:0;z-index:100;height:60px;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:0 var(--gut,28px);background:rgba(11,11,10,.95);border-bottom:1px solid rgba(241,239,230,.12);transition:transform .35s cubic-bezier(.2,.7,.2,1),background-color .3s,border-color .3s}
.top.hide{transform:translateY(-100%)}
.top .brand{display:block;width:158px;flex:none}
.top .brand svg{width:100%;height:auto;display:block}
.keys{display:flex;gap:4px;list-style:none;margin:0;padding:0}
.keys a{position:relative;display:flex;align-items:center;gap:8px;height:38px;padding:0 13px 0 11px;border:1px solid #34342f;border-radius:3px;background:linear-gradient(#262624,#181816);box-shadow:inset 0 1px 0 rgba(255,255,255,.07),0 2px 0 #000;color:#F1EFE6;text-decoration:none;font:600 12px "IBM Plex Mono",ui-monospace,monospace;letter-spacing:.1em;text-transform:uppercase;transition:border-color .15s,color .15s,transform .08s}
.keys a::before{content:"";width:7px;height:7px;border-radius:50%;background:#3d3d38;flex:none;transition:background .15s,box-shadow .15s}
.keys .n{font-weight:500;color:#8f8d84;letter-spacing:.06em}
.keys small{display:none}
.keys a:hover{border-color:#5a5a52;color:#C8FF3D}
.keys a:hover::before{background:#C8FF3D;box-shadow:0 0 8px #C8FF3D}
.keys a:active{transform:translateY(2px);box-shadow:inset 0 1px 0 rgba(255,255,255,.07)}
.keys a[aria-current="page"]{border-color:rgba(255,59,48,.65);color:#F1EFE6}
.keys a[aria-current="page"]::before{background:#FF3B30;box-shadow:0 0 10px #FF3B30;animation:navtally 1.6s infinite}
@keyframes navtally{50%{opacity:.4;box-shadow:none}}
.menu-btn{display:none;align-items:center;gap:9px;min-height:44px;padding:0 14px;background:linear-gradient(#262624,#181816);border:1px solid #34342f;border-radius:3px;box-shadow:inset 0 1px 0 rgba(255,255,255,.07),0 2px 0 #000;color:#F1EFE6;font:600 13px "IBM Plex Mono",ui-monospace,monospace;letter-spacing:.1em;text-transform:uppercase;cursor:pointer}
.mb-lamp{width:7px;height:7px;border-radius:50%;background:#C8FF3D;box-shadow:0 0 8px #C8FF3D}
.menu-btn[aria-expanded="true"] .mb-lamp{background:#FF3B30;box-shadow:0 0 10px #FF3B30}

/* homepage: the header floats over the video wall until you scroll */
.top.over{position:fixed;inset:0 0 auto 0;background:linear-gradient(rgba(0,0,0,.72),rgba(0,0,0,0));border-bottom-color:transparent}
.top.over.solid{background:rgba(11,11,10,.95);border-bottom-color:rgba(241,239,230,.12)}

/* phones and small tablets: the Channels key opens a full-screen channel list */
@media (max-width:980px){
  .menu-btn{display:inline-flex}
  .top .brand{width:136px}
  .nav{display:none;position:fixed;left:0;right:0;top:60px;bottom:0;height:calc(100vh - 60px);height:calc(100dvh - 60px);z-index:99;overflow-y:auto;overscroll-behavior:contain;background:#0B0B0A;padding:8px var(--gut,18px) 40px}
  .nav::before{content:"";position:fixed;left:0;right:0;top:60px;bottom:0;pointer-events:none;background:repeating-linear-gradient(0deg,rgba(255,255,255,.025) 0 1px,transparent 1px 3px)}
  .nav.open{display:block;animation:navin .28s cubic-bezier(.2,.7,.2,1)}
  @keyframes navin{from{opacity:0;transform:translateY(-8px)}}
  .keys{flex-direction:column;gap:0}
  .keys a{display:grid;grid-template-columns:auto 1fr;grid-template-rows:auto auto;column-gap:16px;align-items:end;height:auto;min-height:84px;padding:14px 4px 14px 2px;border:0;border-bottom:1px solid rgba(241,239,230,.12);border-radius:0;background:none;box-shadow:none;font:400 clamp(44px,13vw,64px)/.9 Anton,"Arial Narrow",Impact,sans-serif;letter-spacing:.005em}
  .keys a::before{position:absolute;right:6px;top:22px;width:9px;height:9px}
  .keys .n{grid-row:1/3;align-self:center;font:400 clamp(26px,8vw,36px)/1 Anton,"Arial Narrow",Impact,sans-serif;color:transparent;-webkit-text-stroke:1px #8f8d84}
  .keys small{display:block;grid-column:2;font:500 12px/1.4 "IBM Plex Mono",ui-monospace,monospace;letter-spacing:.06em;text-transform:none;color:#A9A69B;margin-top:6px}
  .keys a[aria-current="page"]{color:#C8FF3D}
  .keys a[aria-current="page"]::after{content:"On air";position:absolute;right:24px;top:17px;font:600 10px "IBM Plex Mono",monospace;letter-spacing:.14em;text-transform:uppercase;color:#FF3B30}
  .keys a:active{transform:none}
}
@media (max-width:720px){.top{padding:0 18px}}
html.menu-open,html.menu-open body{overflow:hidden}
@media (prefers-reduced-motion:reduce){.top,.keys a{transition:none}.keys a[aria-current="page"]::before{animation:none}.nav.open{animation:none}}