body {
  margin: 0;
  font-family: Sans-Serif;
  background-color: #0b0f1a;
  color: #e0e0e0;
}
header {
  padding: 20px 16px;
  text-align: center;
  border-bottom: 1px solid #2c2f45;
}
header h1 {
  margin: 0;
  font-size: 24px
  color: #ffffff;
}
nav {
  padding: 12px 16px;
  display: flex;
  gap: 10;
  flex-wrap: wrap;
  justify-content: center;
  border-bottom: 1px solid #2c2f45;
}
nav a {
  display: inline-block;
  padding: 10px 14px;
  background-color: #1f2933;
  color: #ffffff;
  text-decoration: none;
  border-radius: 10px;
  border: 1px solid #2c2f45;
}
nav a:active {
  background-color: #374151;
  transform: translateY(1px);
}
main {
  max-width: 900px;
  margin: 18px auto;
  padding: 18px;
  background-color: #111827;
  border-radius: 14px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
  border: 1px solid #2c2f45;
}

main h2 {
  margin: 0 0 12px 0;
  padding-bottom: 10px;
  border-bottom: 1px solid #2c2f45;
  color: #ffffff;
}
main h3 {
  margin-top: 18px;
  margin-bottom: 8px;
  color: #ffffff;
}

main p {
  margin: 10px 0;
  line-height: 1.7;
}

/* 6) 리스트 */
main ul {
  padding-left: 20px;
}

main li {
  margin-bottom: 6px;
}

/* 7) 본문 링크(자료실 등) */
main a {
  color: #93c5fd;
}

main a:hover {
  text-decoration: underline;
}

/* 8) 표(protect.html) */
table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 12px;
}

th, td {
  border: 1px solid #2c2f45;
  padding: 10px;
  text-align: left;
  vertical-align: top;
}

thead th {
  background-color: #0f172a;
  color: #ffffff;
}

/* 9) 모바일 조금 더 편하게 */
@media (max-width: 480px) {
  header h1 { font-size: 20px; }
  nav a { padding: 10px 12px; }
  main { margin: 12px; padding: 14px; }