:root {
  color-scheme: light;
  --bg: #f5f7f8;
  --panel: #fff;
  --ink: #142226;
  --muted: #607176;
  --line: #d7e3df;
  --accent: #216b8f;
  --green: #16834a;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.55 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
main {
  max-width: 920px;
  margin: 0 auto;
  padding: 38px 24px 52px;
}
header {
  display: flex;
  align-items: center;
  gap: 18px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 24px;
}
.mark {
  display: block;
  width: 118px;
  height: 68px;
  object-fit: contain;
}
h1, h2, h3 {
  letter-spacing: 0;
  line-height: 1.16;
}
h1 {
  margin: 0 0 6px;
  font-size: 30px;
}
h2 {
  margin: 28px 0 10px;
  font-size: 20px;
}
h3 {
  margin: 20px 0 8px;
  font-size: 16px;
}
p {
  margin: 0 0 13px;
  color: var(--muted);
}
a {
  color: var(--accent);
  font-weight: 650;
}
nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 14px 0 0;
}
nav a, .button {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 7px 12px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #fff;
  color: var(--accent);
  text-decoration: none;
}
.button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}
.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
}
.card h2, .card h3 {
  margin-top: 0;
}
ul, ol {
  margin: 0 0 16px 22px;
  padding: 0;
}
li {
  margin: 6px 0;
}
code, pre {
  font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
}
pre {
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 12px;
  background: #fbfcfc;
  color: var(--green);
  white-space: pre-wrap;
  word-break: break-all;
}
.meta {
  color: var(--muted);
}
@media (max-width: 720px) {
  header {
    align-items: flex-start;
    flex-direction: column;
  }
  .grid {
    grid-template-columns: 1fr;
  }
  .mark {
    width: 108px;
    height: 62px;
  }
}