:root {
  --bg: #eef4fb;
  --paper: #ffffff;
  --ink: #12324f;
  --muted: #3d5974;
  --line: #d2e0ec;
  --link: #145b88;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Source Sans Pro", "Segoe UI", "Helvetica Neue", sans-serif;
  color: var(--ink);
  background: radial-gradient(1200px 700px at 50% -10%, #fff 0, var(--bg) 58%, #e2ebf6 100%);
}

.wrap {
  max-width: 980px;
  margin: 0 auto;
  padding: 20px 14px 28px;
}

.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 10px 24px rgba(16, 45, 75, 0.08);
  padding: 18px;
}

.kicker {
  margin: 0;
  color: #285375;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

h1 {
  margin: 6px 0 8px;
  font-size: clamp(1.6rem, 3.8vw, 2.5rem);
  line-height: 1.1;
}

.lead {
  margin: 0 0 14px;
  color: var(--muted);
}

h2 {
  margin: 16px 0 6px;
  font-size: 1.2rem;
}

ol, ul {
  margin: 0;
  padding-left: 22px;
  line-height: 1.5;
}

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

.back {
  margin-top: 18px;
  font-weight: 700;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  background: #eaf3fc;
  border: 1px solid #c9dff2;
  border-radius: 5px;
  padding: 1px 4px;
}