* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Arial, sans-serif;
  background: #f4f6fb;
  display: flex;
  justify-content: center;
  align-items: center;
}

.card {
  width: 90%;
  max-width: 520px;
  background: #ffffff;
  padding: 40px;
  border-radius: 18px;
  text-align: center;
  box-shadow: 0 10px 30px rgba(0,0,0,0.08);
}

h1 {
  color: #4f46e5;
  margin-bottom: 15px;
}

p {
  color: #444;
  font-size: 18px;
  line-height: 1.5;
}

.btn {
  display: inline-block;
  margin-top: 20px;
  padding: 14px 22px;
  background: #4f46e5;
  color: white;
  text-decoration: none;
  border-radius: 10px;
  font-weight: bold;
}

.btn:hover {
  background: #3730a3;
}