/* General Reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  background: #f9f9f9;
  color: #333;
}

/* Header */
header {
  background: #4a90e2;
  color: #fff;
  padding: 30px 0;
  text-align: center;
}

header h1 {
  margin-bottom: 10px;
  font-size: 2rem;
}

header p {
  font-size: 1.1rem;
}

/* Main Content */
.container {
  width: 90%;
  max-width: 900px;
  margin: 30px auto;
}

main h2 {
  color: #4a90e2;
  margin-bottom: 10px;
}

.guide, .note, .security {
  background: #fff;
  padding: 20px;
  margin-bottom: 20px;
  border-radius: 10px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

ol, ul {
  margin-left: 20px;
  margin-top: 10px;
}

li {
  margin-bottom: 8px;
}

/* Footer */
footer {
  background: #333;
  color: #fff;
  text-align: center;
  padding: 15px 0;
  margin-top: 30px;
  font-size: 0.9rem;
}