* {
  box-sizing: border-box;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background: #f0f2f5;
  margin: 0;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 15px;
}

.ivr-container {
  background: #fff;
  width: 100%;
  max-width: 420px;
  padding: 20px;
  border-radius: 14px;
  box-shadow: 0 8px 20px rgba(0,0,0,0.15);
  text-align: center;
}

h1 {
  margin-top: 0;
  font-size: 22px;
}

h2 {
  font-size: 18px;
  margin-bottom: 10px;
}

button {
  width: 100%;
  margin: 10px 0;
  padding: 16px;
  font-size: 18px;
  border-radius: 12px;
  border: none;
  background: #4CAF50;
  color: #fff;
  cursor: pointer;
  touch-action: manipulation;
}

button:active {
  transform: scale(0.98);
  background: #43a047;
}

button.primary {
  background: #2196F3;
}

button.primary:active {
  background: #1e88e5;
}

/* Remove hover dependency for mobile */
@media (hover: hover) {
  button:hover {
    opacity: 0.9;
  }
}