* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #1a1a2e;
  color: #d0d0d0;
  min-height: 100vh;
  padding: 40px 20px 80px;
  line-height: 1.7;
}
.container {
  max-width: 720px;
  margin: 0 auto;
  background: #16213e;
  border: 1px solid #0f3460;
  border-radius: 12px;
  padding: 48px 40px;
}
h1 {
  color: #ffffff;
  font-size: 28px;
  margin-bottom: 6px;
}
.subtitle {
  color: #888;
  font-size: 14px;
  margin-bottom: 36px;
}
h2 {
  color: #e0e0e0;
  font-size: 18px;
  margin-top: 32px;
  margin-bottom: 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid #0f3460;
}
p {
  margin-bottom: 14px;
  font-size: 15px;
}
ul {
  margin: 0 0 14px 24px;
  font-size: 15px;
}
ul li {
  margin-bottom: 6px;
}
a {
  color: #6fcf97;
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}
strong {
  color: #e0e0e0;
}
.back-link {
  display: inline-block;
  margin-bottom: 24px;
  color: #888;
  font-size: 14px;
}
.back-link:hover {
  color: #e0e0e0;
}
footer {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid #0f3460;
  font-size: 13px;
  color: #666;
  text-align: center;
  line-height: 2;
}
footer a {
  color: #888;
  margin: 0 8px;
}
footer a:hover {
  color: #6fcf97;
}
@media (max-width: 600px) {
  .container { padding: 28px 20px; }
  h1 { font-size: 22px; }
  h2 { font-size: 16px; }
}