:root {
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #102a43;
  background: #f5f8fc;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  line-height: 1.65;
}

main {
  width: min(760px, calc(100% - 32px));
  margin: 42px auto;
  padding: 36px;
  background: white;
  border: 1px solid #e3ebf4;
  border-radius: 24px;
  box-shadow: 0 18px 50px rgba(16, 42, 67, 0.08);
}

.brand {
  color: #3568e8;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  margin: 8px 0 4px;
  font-size: clamp(2rem, 6vw, 3rem);
  line-height: 1.1;
}

h2 {
  margin: 30px 0 7px;
  font-size: 1.12rem;
}

p { margin: 0 0 12px; }

.updated {
  margin-bottom: 24px;
  color: #627d98;
  font-weight: 600;
}

.notice {
  margin: 24px 0;
  padding: 16px;
  border-left: 4px solid #3568e8;
  border-radius: 8px;
  background: #eef4ff;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid #e3ebf4;
}

a {
  color: #2458d3;
  font-weight: 700;
}

@media (max-width: 560px) {
  main {
    margin: 0;
    width: 100%;
    min-height: 100vh;
    padding: 28px 20px;
    border: 0;
    border-radius: 0;
  }
}