body {
  font-family: Arial, sans-serif;
  background: linear-gradient(135deg, #6a11cb, #2575fc);
  color: white;
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  min-height: 100vh;
}

.container {
  width: 95%;
  max-width: 600px;
  margin-top: 30px;
  background: rgba(0,0,0,0.6);
  padding: 20px;
  border-radius: 16px;
  box-shadow: 0 8px 20px rgba(0,0,0,0.4);
}

h1 {
  margin: 0;
  font-size: 2rem;
  text-align: center;
}

.subtitle {
  text-align: center;
  font-size: 1rem;
  margin-bottom: 20px;
  opacity: 0.8;
}

.form label {
  display: block;
  margin-top: 10px;
  font-size: 0.9rem;
}

.form input, .form select {
  width: 100%;
  padding: 8px;
  margin-top: 4px;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
}

.buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 15px;
  justify-content: center;
}

.buttons button {
  flex: 1 1 45%;
  padding: 10px;
  border: none;
  border-radius: 12px;
  font-size: 1rem;
  cursor: pointer;
  transition: transform 0.15s ease;
}

.buttons button:enabled:hover {
  transform: scale(1.05);
}

#join { background: #28a745; color: white; }
#leave { background: #dc3545; color: white; }
#call { background: #007bff; color: white; }
#endcall { background: #ff9800; color: white; }
#mute { background: #6c757d; color: white; }
#speaker { background: #17a2b8; color: white; }

#log {
  background: black;
  color: lime;
  font-family: monospace;
  padding: 10px;
  border-radius: 8px;
  margin-top: 15px;
  height: 150px;
  overflow-y: auto;
}