:root {
  color-scheme: light dark;
  --page: #ffffff;
  --surface: #f5f7fa;
  --ink: #16181d;
  --secondary: #6f7682;
  --line: #e3e7ee;
  --accent: #315fe8;
}

* { box-sizing: border-box; }

html { background: var(--page); }

body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  line-height: 1.7;
  letter-spacing: 0;
}

a { color: var(--accent); }

.shell {
  width: min(760px, calc(100% - 40px));
  margin: 0 auto;
  padding: 42px 0 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 42px;
}

.brand img {
  width: 52px;
  height: 52px;
  border-radius: 8px;
}

.brand strong { display: block; font-size: 18px; }
.brand span { color: var(--secondary); font-size: 13px; }

h1 {
  margin: 0 0 8px;
  font-size: 34px;
  line-height: 1.25;
}

.updated {
  margin: 0 0 36px;
  color: var(--secondary);
  font-size: 14px;
}

h2 {
  margin: 34px 0 10px;
  font-size: 20px;
  line-height: 1.4;
}

p, li { font-size: 15px; }
ul { padding-left: 22px; }

.notice, .link-list {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  padding: 18px;
}

.link-list {
  display: grid;
  gap: 1px;
  padding: 0;
  overflow: hidden;
}

.link-list a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 58px;
  padding: 0 18px;
  background: var(--page);
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
}

.link-list a:last-child { border-bottom: 0; }
.link-list a::after { content: "↗"; color: var(--secondary); }

footer {
  margin-top: 52px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  color: var(--secondary);
  font-size: 13px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --page: #000000;
    --surface: #14161b;
    --ink: #f5f7fb;
    --secondary: #9299a5;
    --line: #292d36;
    --accent: #83a4ff;
  }
}

@media (max-width: 520px) {
  .shell { width: min(100% - 32px, 760px); padding-top: 28px; }
  .brand { margin-bottom: 32px; }
  h1 { font-size: 29px; }
}