:root {
  color-scheme: light dark;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  font-family: "Segoe UI", Roboto, Arial, sans-serif;
  background: linear-gradient(135deg, #f2f6ff, #e8fff6);
  color: #1f2937;
}

.card {
  width: min(90vw, 460px);
  padding: 2rem;
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
  text-align: center;
  backdrop-filter: blur(4px);
}

.dot {
  width: 14px;
  height: 14px;
  margin: 0 auto 1rem;
  border-radius: 50%;
  background: #f59e0b;
  box-shadow: 0 0 0 0 rgba(245, 158, 11, 0.8);
  animation: pulse 1.4s infinite;
}

h1 {
  margin: 0 0 0.6rem;
  font-size: 1.8rem;
}

p {
  margin: 0;
  line-height: 1.5;
  color: #4b5563;
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(245, 158, 11, 0.8);
  }
  70% {
    box-shadow: 0 0 0 12px rgba(245, 158, 11, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(245, 158, 11, 0);
  }
}