:root {
  --ink: #071734;
  --muted: #5f6f91;
  --line: #dbe5ff;
  --panel: #ffffff;
  --wash: #f5f8ff;
  --brand: #12cfe3;
  --brand-dark: #071734;
  --accent: #bd39ef;
  --accent-blue: #3e74ff;
}

* {
  box-sizing: border-box;
}

body {
  max-width: none;
  margin: 0;
  padding: 0;
  line-height: 1.6;
  color: var(--ink);
  background:
    radial-gradient(circle at 16% 12%, rgba(189, 57, 239, 0.14), transparent 28%),
    radial-gradient(circle at 82% 6%, rgba(18, 207, 227, 0.14), transparent 30%),
    linear-gradient(180deg, var(--wash) 0, #fff 430px);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.page {
  max-width: 980px;
  margin: 0 auto;
  padding: 28px 24px 52px;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 54px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  font-weight: 700;
}

.app-mark {
  width: 42px;
  height: 42px;
  border-radius: 9px;
  box-shadow: 0 12px 28px rgba(7, 23, 52, 0.18);
  object-fit: cover;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 15px;
}

.document {
  max-width: 840px;
  margin: 0 auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 34px;
  background: var(--panel);
  box-shadow: 0 18px 40px rgba(7, 23, 52, 0.07);
}

.contents {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
  background: #f8fbff;
}

.contents h2 {
  margin-top: 0;
}

.contents ul {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 18px;
  margin: 0;
  padding-left: 20px;
}

.contents li {
  margin-bottom: 0;
}

h1,
h2,
h3,
h4 {
  color: var(--ink);
}

h1 {
  letter-spacing: 0;
}

.date,
footer,
.document footer {
  color: var(--muted);
}

a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

a:hover {
  text-decoration: underline;
}

hr {
  border: 0;
  border-top: 1px solid var(--line);
}

@media (max-width: 720px) {
  .page {
    padding: 22px 18px 36px;
  }

  .site-header {
    align-items: flex-start;
    flex-direction: column;
    margin-bottom: 34px;
  }

  .document {
    padding: 24px 20px;
  }

  .contents ul {
    grid-template-columns: 1fr;
  }

  .hero-logo {
    display: none;
  }
}