* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 16px;
  color: #222;
  background-color: #f7f9fc;
  min-height: 100vh;
  display: flex;
}
.container {
  width: 100%;
  max-width: 640px;
  margin: auto;
  padding: 40px 24px;
  text-align: center;
}
h1 {
  font-size: 2.2rem;
  margin-bottom: 20px;
  color: #1f2937;
}
.desc {
  font-size: 1rem;
  color: #4b5563;
  margin-bottom: 32px;
  line-height: 1.6;
}
.card {
  background: #ffffff;
  padding: 32px 24px;
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
}
.card p {
  font-size: 1.1rem;
  color: #374151;
}