* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #111;
  color: white;
}

.app {
  max-width: 480px;
  margin: auto;
  padding: 20px;
}

h1 {
  color: #ffb300;
  margin-bottom: 5px;
}

.sub {
  color: #aaa;
}

.card {
  background: #1d1d1d;
  border: 1px solid #333;
  border-radius: 18px;
  padding: 20px;
  margin-top: 18px;
  box-shadow: 0 0 20px rgba(255, 179, 0, 0.08);
}

button {
  width: 100%;
  padding: 15px;
  margin-top: 12px;
  border: none;
  border-radius: 12px;
  background: #ffb300;
  color: #111;
  font-weight: bold;
  font-size: 16px;
}

button.dark {
  background: #333;
  color: white;
}

.circle {
  width: 180px;
  height: 180px;
  border: 12px solid #ffb300;
  border-radius: 50%;
  margin: 20px auto;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: pulse 1.5s infinite;
}

.circle span {
  font-size: 24px;
  font-weight: bold;
}

h3 {
  color: #ffb300;
  font-size: 28px;
}

.info {
  color: #ccc;
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 rgba(255, 179, 0, 0.3);
  }
  50% {
    box-shadow: 0 0 25px rgba(255, 179, 0, 0.8);
  }
  100% {
    box-shadow: 0 0 0 rgba(255, 179, 0, 0.3);
  }
}