body {
  font-family: Arial, sans-serif;
  background: #f3f4f6;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  margin: 0;
}

.container {
  text-align: center;
  background: #fff;
  padding: 20px 30px;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

h1 {
  margin-bottom: 20px;
}

.buttons button {
  margin: 5px;
  padding: 10px 20px;
  font-size: 18px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: 0.2s;
}

#up { background: #10b981; color: #fff; }
#down { background: #3b82f6; color: #fff; }
#mute { background: #ef4444; color: #fff; }

.buttons button:hover {
  opacity: 0.85;
}

#status {
  margin-top: 15px;
  font-size: 14px;
  color: #333;
}