:root{
    --bg:#000; --fg:#fff;
  }
  *{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
  html,body{margin:0;height:100%;overflow:hidden;background:var(--bg);color:var(--fg);
    font:400 16px/1.45 ui-sans-serif,-apple-system,"SF Pro Text",Inter,system-ui,sans-serif;
    -webkit-font-smoothing:antialiased;overscroll-behavior:none}

  /* ---------- feed ---------- */
  #feed{height:100dvh;overflow-y:scroll;scroll-snap-type:y mandatory;
    scrollbar-width:none;overscroll-behavior-y:contain}
  #feed::-webkit-scrollbar{display:none}
  .slide{height:100dvh;scroll-snap-align:start;scroll-snap-stop:always;
    position:relative;overflow:hidden}

  /* ---------- video stage ---------- */
  .stage{position:absolute;inset:0;pointer-events:none}
  #player-viewport{position:fixed;z-index:2;pointer-events:auto;opacity:0;
    overflow:hidden;background:#000}
  #player-host{position:absolute;pointer-events:auto}
  #player-host iframe{width:100%;height:100%;border:0;pointer-events:auto}
  /* Preserve feed swipes while leaving YouTube's controls and timeline clickable. */
  .tapshield{position:absolute;inset:0 150px 90px 0;z-index:3;pointer-events:auto}
  .slide:not(.short) .tapshield{
    right:calc((100vw - min(100vw,177.777dvh))/2 + 150px);
    bottom:calc((100dvh - min(100dvh,56.25vw))/2 + 90px)}
  .action-links{position:absolute;z-index:4;left:14px;bottom:116px;
    display:flex;align-items:center;gap:6px;pointer-events:none}
  .join-link,.share-link{
    display:inline-flex;align-items:center;gap:4px;padding:4px 6px;
    color:rgba(255,255,255,.78);background:rgba(0,0,0,.25);border-radius:5px;
    border:0;font:500 12px/1 ui-sans-serif,-apple-system,"SF Pro Text",Inter,system-ui,sans-serif;
    text-decoration:none;cursor:pointer;
    pointer-events:auto}
  .join-link:hover,.join-link:focus-visible,.share-link:hover,.share-link:focus-visible{
    color:#fff;background:rgba(0,0,0,.55)}
  .join-link svg{width:12px;height:12px;fill:none;stroke:currentColor;
    stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
  .slide:not(.short) .action-links{
    left:calc((100vw - min(100vw,177.777dvh))/2 + 14px);
    bottom:calc((100dvh - min(100dvh,56.25vw))/2 + 140px)}
  @media (max-aspect-ratio:3/2){
    .slide:not(.short) .action-links{
      bottom:calc((100dvh - min(100dvh,56.25vw))/2 - 32px)}
  }
  .stage.short{z-index:3}
  @media (min-width:700px){
    .stage.short{width:min(100vw,56.25dvh);left:50%;right:auto;transform:translateX(-50%)}
  }
  #notice{position:fixed;z-index:20;top:calc(env(safe-area-inset-top) + 16px);
    left:16px;right:16px;max-width:440px;margin:auto;padding:10px 14px;
    color:#fff;background:#181818ee;border-radius:8px;font-size:13px;
    pointer-events:none}
  #notice:empty{display:none}