* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
}

body {
  min-height: 100vh;
  margin: 0;
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #f8fafc;
  color: #0f172a;
  font-family: Arial, Helvetica, sans-serif;
  text-align: center;
}

.landing {
  width: 100%;
  max-width: 560px;
}

.mark {
  width: 48px;
  height: 48px;
  margin: 0 auto 24px;
  border-radius: 12px;
  background-color: #2563eb;
}

h1 {
  margin: 0 0 16px;
  font-size: 48px;
  line-height: 1.15;
}

p {
  margin: 0;
  color: #475569;
  font-size: 18px;
  line-height: 1.6;
}

@media (max-width: 480px) {
  h1 { font-size: 36px; }
  p { font-size: 16px; }
}