* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, Helvetica, sans-serif;
}

body {
  background: #f4f6f8;
  color: #333;
}

/* Header */
header {
  background: #0052ff;
  color: white;
  padding: 24px;
  text-align: center;
}

/* Layout */
.container {
  max-width: 900px;
  margin: 40px auto;
  padding: 0 20px;
}

.card {
  background: white;
  padding: 24px;
  border-radius: 10px;
  margin-bottom: 20px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.card h2 {
  margin-bottom: 10px;
}

/* Button */
button {
  padding: 10px 16px;
  border: none;
  background: #0052ff;
  color: white;
  border-radius: 6px;
  cursor: pointer;
  margin-top: 10px;
}

button:hover {
  background: #003fd1;
}

/* Footer */
footer {
  text-align: center;
  padding: 20px;
  color: #666;
}