* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI",
               Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  background: #f5f6f8;
  color: #333;
}

.container {
  max-width: 800px;
  margin: 60px auto;
  padding: 24px;
}

h1 {
  font-size: 2.2rem;
  margin-bottom: 0.2em;
}

.subtitle {
  color: #666;
  margin-bottom: 2em;
}

.card {
  background: #fff;
  border-radius: 6px;
  padding: 16px 20px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.06);
}

footer {
  margin-top: 40px;
  font-size: 0.9rem;
  color: #888;
}