* { box-sizing: border-box; margin: 0; }
body {
  font: 16px/1.6 system-ui, "Segoe UI", sans-serif;
  color: #14202c; background: #fff;
}
a { color: #1f7ae0; }
nav {
  display: flex; justify-content: space-between; align-items: center;
  padding: 16px 28px; border-bottom: 1px solid #eef2f6;
}
nav div { display: flex; gap: 20px; align-items: center; }
nav a { text-decoration: none; font-size: 14px; }
.logo { font-weight: 700; font-size: 17px; color: #14202c; }
.btn {
  display: inline-block; padding: 12px 24px; border-radius: 10px;
  background: #1f7ae0; color: #fff; font-weight: 600; text-decoration: none;
}
.btn:hover { background: #1668c4; }
.btn.small { padding: 8px 16px; font-size: 14px; }
.ghost { display: inline-block; padding: 12px 20px; color: #1f7ae0; text-decoration: none; font-size: 14px; }
.hero { max-width: 720px; margin: 0 auto; padding: 72px 24px 56px; text-align: center; }
.hero h1 { font-size: 42px; line-height: 1.15; letter-spacing: -.5px; }
.hero p { margin: 18px 0 26px; color: #52616f; font-size: 17px; }
.cta { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; }
.tiny { font-size: 12.5px; color: #8b98a5; margin-top: 14px; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; max-width: 900px; margin: 0 auto; padding: 0 24px 56px; }
.card { border: 1px solid #eef2f6; border-radius: 14px; padding: 20px; }
.card h3 { font-size: 15px; margin-bottom: 6px; }
.card p { font-size: 13.5px; color: #52616f; }
.panel { max-width: 720px; margin: 0 auto 56px; padding: 0 24px; }
.panel h2 { font-size: 22px; margin-bottom: 14px; }
.panel ol { padding-left: 20px; font-size: 14.5px; color: #52616f; }
.panel li { margin-bottom: 6px; }
code { background: #f2f6fa; padding: 2px 6px; border-radius: 4px; font-size: 13px; }
details { border-bottom: 1px solid #eef2f6; padding: 12px 0; }
summary { cursor: pointer; font-weight: 600; font-size: 14.5px; }
details p { font-size: 13.5px; color: #52616f; margin-top: 8px; }
footer { text-align: center; padding: 28px; font-size: 12.5px; color: #8b98a5; border-top: 1px solid #eef2f6; }