:root {
  color-scheme: dark;
  --bg: #071019;
  --panel: #0c1823;
  --panel-2: #101f2c;
  --line: #203545;
  --muted: #7f98aa;
  --text: #eaf5fb;
  --cyan: #3ad5ff;
  --green: #4ce0a0;
  --yellow: #f7c95c;
  --red: #ff6978;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at 50% -20%, #173247 0, var(--bg) 42%);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, sans-serif;
}

header {
  height: 88px;
  padding: 0 28px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(7, 16, 25, .78);
  backdrop-filter: blur(14px);
}
h1, h2, p { margin: 0; }
h1 { font-size: 22px; letter-spacing: -.02em; }
h2 { margin-top: 3px; font-size: 17px; }
.eyebrow, .label {
  color: var(--cyan);
  font: 600 10px/1.5 ui-monospace, SFMono-Regular, monospace;
  letter-spacing: .15em;
}
.live-state {
  color: var(--muted);
  font: 600 11px ui-monospace, monospace;
  letter-spacing: .08em;
}
.live-state span {
  display: inline-block;
  width: 8px; height: 8px;
  margin-right: 8px;
  border-radius: 50%;
  background: var(--yellow);
  box-shadow: 0 0 12px currentColor;
}
.live-state.live { color: var(--green); }
.live-state.live span { background: var(--green); animation: pulse 1.5s infinite; }
.live-state.error { color: var(--red); }
.live-state.error span { background: var(--red); }

main {
  padding: 22px;
  display: grid;
  grid-template-columns: minmax(460px, 1.25fr) minmax(420px, 1fr);
  grid-template-rows: auto 220px;
  gap: 18px;
}
.panel {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: linear-gradient(145deg, rgba(16,31,44,.94), rgba(9,20,30,.96));
  box-shadow: 0 18px 50px rgba(0,0,0,.2);
  overflow: hidden;
}
.panel-heading {
  min-height: 68px;
  padding: 14px 17px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}
.panel-heading a, button {
  color: var(--cyan);
  font: 600 11px ui-monospace, monospace;
  text-decoration: none;
}
button { border: 0; background: transparent; cursor: pointer; }
.pill {
  padding: 5px 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--yellow);
  font: 600 10px ui-monospace, monospace;
  text-transform: uppercase;
}

.channel-controls {
  display: flex;
  align-items: center;
  gap: 9px;
}
.channel-controls label {
  color: var(--muted);
  font: 600 9px ui-monospace, monospace;
}
.channel-controls select {
  max-width: 230px;
  padding: 6px 9px;
  border: 1px solid var(--line);
  border-radius: 7px;
  color: var(--text);
  background: #09141e;
  font: 11px ui-monospace, monospace;
}

.video-frame {
  position: relative;
  aspect-ratio: 16/9;
  background: #020609;
  display: grid;
  place-items: center;
}
#player-mount, moq-watch-ui, moq-watch, canvas {
  display: block;
  width: 100%;
  height: 100%;
}
canvas { object-fit: contain; }
.video-placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 10px;
  color: var(--muted);
  background: radial-gradient(circle, #102331 0, #03080c 70%);
  pointer-events: none;
  transition: opacity .25s;
}
.video-placeholder.hidden { opacity: 0; }
.video-placeholder small { font: 11px ui-monospace, monospace; }
.spinner {
  width: 28px; height: 28px;
  border: 2px solid var(--line);
  border-top-color: var(--cyan);
  border-radius: 50%;
  animation: spin .8s linear infinite;
}
.transport-strip {
  padding: 11px 15px;
  display: flex;
  justify-content: space-between;
  gap: 10px;
  color: var(--muted);
  font: 10px ui-monospace, monospace;
}

.playback-controls {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: .75rem 1rem;
  background: rgba(0, 0, 0, .28);
  border-top: 1px solid var(--line);
}

.playback-controls button {
  border: 1px solid var(--line);
  border-radius: .5rem;
  padding: .55rem .8rem;
  color: var(--text);
  background: rgba(255, 255, 255, .06);
  cursor: pointer;
}

.playback-controls button:disabled {
  cursor: default;
  opacity: .4;
}

#return-live:not(:disabled) {
  color: var(--red);
  border-color: rgba(255, 92, 92, .45);
}

#playback-position {
  margin-left: auto;
  color: var(--muted);
  font-size: .8rem;
}
.edge-selector {
  display: flex;
  gap: 8px;
  padding: 0 15px 12px;
}
.edge-selector span { color: var(--muted); font: 10px ui-monospace, monospace; align-self: center; }
.edge-selector a {
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font: 10px ui-monospace, monospace;
  text-decoration: none;
}
.edge-selector a:hover, .edge-selector a.selected {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(58,213,255,.08);
}

.topology-panel { padding-bottom: 15px; }
.topology { padding: 18px 16px 13px; }
.node {
  position: relative;
  min-height: 60px;
  padding: 10px 12px;
  display: flex;
  align-items: center;
  gap: 11px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(5,13,20,.72);
}
.node strong, .node small { display: block; }
.node strong { font-size: 13px; }
.node small { margin-top: 3px; color: var(--muted); font: 10px ui-monospace, monospace; }
.node i {
  position: absolute;
  right: 13px;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--yellow);
  box-shadow: 0 0 10px var(--yellow);
}
.node.online i { background: var(--green); box-shadow: 0 0 10px var(--green); }
.node.error i { background: var(--red); box-shadow: 0 0 10px var(--red); }
.node-icon {
  width: 34px; height: 34px;
  display: grid; place-items: center;
  border-radius: 9px;
  font: 700 14px ui-monospace, monospace;
}
.publisher-icon { color: #ffd270; background: rgba(247,201,92,.13); }
.relay-icon { color: var(--cyan); background: rgba(58,213,255,.13); }
.subscriber-icon { color: var(--green); background: rgba(76,224,160,.13); }
.link {
  position: relative;
  height: 45px;
  margin-left: 28px;
  padding: 7px 0 0 29px;
  border-left: 2px solid #294658;
}
.link b, .link small { display: block; }
.link b { color: var(--cyan); font: 600 10px ui-monospace, monospace; }
.link small { margin-top: 2px; color: var(--muted); font: 9px ui-monospace, monospace; }
.flow-dot {
  position: absolute;
  left: -5px; top: 2px;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 12px var(--cyan);
  animation: flow 1.4s linear infinite;
}
.flow-dot.second { animation-delay: -.7s; }
.metrics-grid {
  padding: 0 16px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}
.metrics-grid article {
  padding: 9px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(5,13,20,.6);
}
.metrics-grid span { display: block; color: var(--muted); font-size: 9px; }
.metrics-grid strong { display: block; margin-top: 4px; font: 600 18px ui-monospace, monospace; }

.events-panel { grid-column: 1 / -1; }
#events {
  height: 145px;
  margin: 0;
  padding: 10px 17px 15px;
  overflow: auto;
  list-style: none;
  font: 11px/1.8 ui-monospace, monospace;
}
#events li { display: grid; grid-template-columns: 90px 110px 1fr; border-bottom: 1px solid rgba(32,53,69,.45); }
#events time { color: var(--muted); }
#events b { color: var(--cyan); font-weight: 500; }

@keyframes spin { to { transform: rotate(360deg); } }
@keyframes pulse { 50% { opacity: .35; } }
@keyframes flow { from { transform: translateY(0); } to { transform: translateY(40px); } }

@media (max-width: 900px) {
  main { grid-template-columns: 1fr; }
  .events-panel { grid-column: auto; }
  .transport-strip { flex-direction: column; }
}