:root {
  --bg: #ffffff;
  --text: #111111;
  --muted: #555555;
  --border: #e0e0e0;
  --card-bg: #fbfbfb;
  --accent: #000000;
  --link: #003366;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121212;
    --text: #e0e0e0;
    --muted: #a0a0a0;
    --border: #2a2a2a;
    --card-bg: #1a1a1a;
    --accent: #ffffff;
    --link: #8ab4f8;
  }
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 16px;
  padding: 20px;
}
.container {
  max-width: 900px;
  margin: 0 auto;
}
header {
  border-bottom: 2px solid var(--border);
  padding-bottom: 25px;
  margin-bottom: 35px;
}
h1 {
  font-size: 2rem;
  letter-spacing: -0.5px;
  margin-bottom: 8px;
  color: var(--accent);
}
.subtitle {
  color: var(--muted);
  font-size: 1.05rem;
}
.notice-box {
  background-color: var(--card-bg);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  padding: 16px 20px;
  margin-bottom: 35px;
  font-size: 0.95rem;
}
.notice-box strong {
  color: var(--accent);
}
section {
  margin-bottom: 40px;
}
h2 {
  font-size: 1.3rem;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 8px;
  color: var(--accent);
}
p {
  margin-bottom: 16px;
  color: var(--text);
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  margin-top: 20px;
}
.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  padding: 20px;
}
.card h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
  color: var(--accent);
}
.card p {
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 0;
}
ul {
  list-style-position: inside;
  margin-bottom: 16px;
  color: var(--text);
}
li {
  margin-bottom: 6px;
}
a {
  color: var(--link);
  text-decoration: underline;
  text-underline-offset: 3px;
}
a:hover {
  text-decoration: none;
}
.table-wrap {
  overflow-x: auto;
  margin-bottom: 20px;
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  text-align: left;
}
th, td {
  padding: 12px 14px;
  border: 1px solid var(--border);
}
th {
  background-color: var(--card-bg);
  color: var(--accent);
}
footer {
  border-top: 1px solid var(--border);
  padding-top: 25px;
  margin-top: 50px;
  font-size: 0.85rem;
  color: var(--muted);
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.network-links {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
}