:root { color-scheme: dark; font: 16px system-ui, sans-serif; background: #091310; color: #eef7f1; }
* { box-sizing: border-box; }
body { margin: 0; }
main { max-width: 1100px; margin: auto; padding: 24px; }
.site-header { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 22px; }
.site-header h1 { font-size: 25px; margin: 3px 0 0; }
.eyebrow { letter-spacing: .16em; font-size: 10px; color: #96b5a5; margin: 0; }
.site-header a { color: #b7d5c5; font-size: 13px; text-decoration: none; border: 1px solid #304a3e; padding: 10px 14px; border-radius: 8px; }
button, select { font: inherit; min-height: 44px; border: 1px solid #395247; border-radius: 8px; background: #183025; color: inherit; padding: 9px 14px; }
button { cursor: pointer; }
button:disabled, select:disabled { opacity: .6; cursor: default; }
button:focus-visible, select:focus-visible, a:focus-visible { outline: 3px solid #98e8bd; outline-offset: 3px; }
[hidden] { display: none !important; }
#backup-stage { position: relative; background: #030907; border: 1px solid #2c4438; border-radius: 14px; overflow: hidden; }
#backup-channelbar { padding: 12px 16px; display: flex; align-items: center; gap: 12px; background: #11251b; }
#backup-channelbar label { color: #b4cabb; font-size: 12px; }
#backup-channel { min-width: 0; flex: 1; }
#backup-playback-label { font-size: 11px; color: #b1c2b8; min-width: 55px; text-align: right; }
#backup-stage[data-playback="playing"] #backup-playback-label { color: #9ce7ba; }
#backup-mount { aspect-ratio: 16/9; background: radial-gradient(ellipse at center, #14261c, #020704); }
video { width: 100%; height: 100%; object-fit: contain; display: block; }
#backup-controls { padding: 14px 16px; background: #102018; }
.buttons { display: flex; gap: 8px; flex-wrap: wrap; }
#backup-play { background: #a1e5bd; color: #10291b; border-color: #a1e5bd; min-width: 80px; font-weight: 600; }
#backup-fullscreen { margin-left: auto; }
#backup-status { font-size: 12px; margin: 10px 0 0; min-height: 18px; color: #b5cebf; overflow-wrap: anywhere; }
#backup-empty-panel { position: absolute; top: 43%; left: 50%; transform: translate(-50%, -50%); width: min(520px, 90%); text-align: center; background: #0e2019f5; border: 1px solid #355443; border-radius: 12px; padding: 22px; box-shadow: 0 14px 40px #0006; }
#backup-empty-title { font-size: 20px; margin: 0 0 10px; }
#backup-empty-description { font-size: 13px; line-height: 1.6; color: #c0d3c6; margin: 0 0 16px; }
.page-notice { padding: 12px 16px; border: 1px solid #355443; border-radius: 8px; background: #13271d; font-size: 13px; }
.player-help { color: #8fae9b; font-size: 12px; text-align: center; margin-top: 14px; }
#backup-ad-preview { margin-top: 16px; padding: 16px; background: #223b30; border: 1px solid #6a967f; border-radius: 8px; display: flex; justify-content: space-between; align-items: center; }
#backup-stage:fullscreen, #backup-stage.pseudo-fullscreen { width: 100%; height: 100%; border: 0; border-radius: 0; background: #000; }
#backup-stage.pseudo-fullscreen { position: fixed; inset: 0; z-index: 2147483647; }
#backup-stage:fullscreen #backup-mount, #backup-stage.pseudo-fullscreen #backup-mount { height: 100%; aspect-ratio: auto; }
#backup-stage:fullscreen #backup-channelbar, #backup-stage.pseudo-fullscreen #backup-channelbar { position: absolute; top: 0; left: 0; right: 0; padding-top: max(12px, env(safe-area-inset-top)); background: linear-gradient(#000e, #0004); }
#backup-stage:fullscreen #backup-controls, #backup-stage.pseudo-fullscreen #backup-controls { position: absolute; bottom: 0; left: 0; right: 0; padding: 14px max(16px, env(safe-area-inset-right)) max(14px, env(safe-area-inset-bottom)) max(16px, env(safe-area-inset-left)); background: linear-gradient(transparent, #000f); }
#backup-controls, #backup-channelbar { transition: opacity .18s; }
#backup-stage.idle #backup-controls, #backup-stage.idle #backup-channelbar { opacity: 0; pointer-events: none; }
body.backup-fullscreen #backup-ad-preview { display: none !important; }
#backup-stage:is([data-playback="error"], [data-playback="maintenance"]):not(:fullscreen):not(.pseudo-fullscreen) #backup-mount { display: none; }
#backup-stage:is([data-playback="error"], [data-playback="maintenance"]):not(:fullscreen):not(.pseudo-fullscreen) #backup-empty-panel { position: static; transform: none; margin: 16px auto; }
@media (max-width: 600px) {
  main { padding: 12px; }
  .site-header { margin-bottom: 14px; }
  button, select { font-size: 14px; padding: 8px 11px; }
  #backup-channelbar { gap: 8px; padding: 10px; }
  #backup-channelbar label { display: none; }
  #backup-controls { padding: 12px; }
  #backup-quality { max-width: 125px; }
  #backup-empty-panel { padding: 16px; }
  #backup-empty-title { font-size: 17px; }
  #backup-empty-description { font-size: 12px; }
}