* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: #000;
  color: #fff;
  font-family: Arial, sans-serif;
}

#app {
  display: flex;
  width: 100%;
  height: 100vh;
}

/* ===== GROUPS ===== */
#groups {
  width: 22%;
  background: #0b0b0b;
  overflow: hidden;
}

.group {
  padding: 18px 20px;
  font-size: 20px;
  opacity: 0.6;
}

.group.active {
  background: #1e90ff;
  opacity: 1;
}

/* ===== CHANNELS ===== */
#channels {
  width: 78%;
  background: #050505;
  overflow: hidden;
}

.channel {
  padding: 16px 24px;
  font-size: 20px;
  border-bottom: 1px solid #111;
  opacity: 0.6;
}

.channel.active {
  background: #222;
  opacity: 1;
  color: #1e90ff;
}

/* ===== PLAYER ===== */
#player-wrap {
  position: fixed;
  inset: 0;
  background: #000;
  z-index: 10;
}

#player {
  width: 100%;
  height: 100%;
}

#player-overlay {
  position: absolute;
  bottom: 20px;
  left: 20px;
  font-size: 16px;
  opacity: 0.7;
}

.hidden {
  display: none;
}