body {
  background: #0c1114;
  font-family: sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

/* 📻 RADIO BODY */
.radio-app {
  background: #1a1f24;
  border-radius: 20px;
  padding: 20px;
  width: 320px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.6);
}

/* 📺 SCREEN */
.radio-screen {
  background: #050a0c;
  color: #00ff9c;
  padding: 15px;
  border-radius: 12px;
  margin-bottom: 20px;
  text-align: center;
}

/* 📊 VISUALIZER */
.visualizer {
  display: flex;
  justify-content: center;
  gap: 4px;
  margin-top: 10px;
  height: 30px;
}

.visualizer div {
  width: 4px;
  height: 10px;
  background: #00ff9c;
  transition: height 0.1s;
}

/* 🎛️ CONTROLS */
.radio-controls {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

select, button {
  padding: 10px;
  border-radius: 10px;
  border: none;
}

/* 🎤 TALK BUTTON */
#talkBtn {
  background: #222;
  color: white;
  font-weight: bold;
  font-size: 16px;
}

/* 🔥 ACTIVE STATE */
#talkBtn.active {
  background: #00ff9c;
  color: black;
  transform: scale(1.05);
}

/* 🟢 SPEAKING GLOW */
.speaking {
  box-shadow: 0 0 20px #00ff9c;
}

.visualizer div {
  width: 5px;
  height: 6px;
  background: #00ff9c;
  border-radius: 2px;
  transition: height 0.08s ease;
}

/* glow als iemand praat */
.radio-app.speaking {
  box-shadow: 0 0 30px #00ff9c;
}

.back-button {
  position: fixed;
  top: 20px;
  left: 20px;
  background: #1a1f24;
  color: #00ff9c;
  border: none;
  padding: 10px 14px;
  border-radius: 10px;
  cursor: pointer;
  font-weight: bold;
  z-index: 1000;
  transition: 0.2s;
}

.back-button:hover {
  background: #00ff9c;
  color: black;
}