:root {
  --bg: #101418;
  --panel: #182028;
  --accent: #4fc3f7;
  --text: #f3f6fa;
  --muted: #a7b1bc;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Arial, sans-serif;
}

.app {
  display: grid;
  grid-template-columns: 420px 1fr;
  height: 100vh;
}

.sidebar {
  background: var(--panel);
  padding: 16px;
  border-right: 1px solid #2a3642;
}
.sidebar h1 { margin: 0 0 12px; font-size: 24px; }
.row { margin-bottom: 10px; }
input, button {
  width: 100%;
  height: 42px;
  border-radius: 8px;
  border: 1px solid #314252;
  background: #0f151b;
  color: var(--text);
  padding: 0 12px;
  font-size: 16px;
}
button {
  cursor: pointer;
  background: #1e2d3a;
}
button:focus, input:focus {
  outline: 2px solid var(--accent);
}

#channelList {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  max-height: calc(100vh - 200px);
  overflow: auto;
}
#channelList li {
  padding: 12px;
  border-radius: 8px;
  margin-bottom: 8px;
  background: #0f151b;
  border: 1px solid #23303d;
  cursor: pointer;
}
#channelList li.active {
  border-color: var(--accent);
  background: #162635;
}
#channelList li .meta {
  color: var(--muted);
  font-size: 13px;
}

.player-area {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.player-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
#statusText { color: var(--muted); }

video {
  width: 100%;
  height: calc(100vh - 140px);
  border: 1px solid #2a3642;
  border-radius: 10px;
  background: #000;
}
.help { color: var(--muted); font-size: 14px; }