* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: #f5f7fb;
  color: #1b2430;
  line-height: 1.6;
}
.container {
  max-width: 900px;
  margin: 40px auto;
  padding: 0 16px 40px;
}
h1 { margin: 0 0 8px; }
h2 { margin-top: 24px; }
.lead { font-size: 1.1rem; margin-bottom: 20px; }
.muted { color: #5b6b80; }
.card {
  background: #fff;
  border: 1px solid #e7edf6;
  border-radius: 14px;
  padding: 20px;
  box-shadow: 0 4px 14px rgba(20, 32, 56, 0.06);
}
a { color: #2f66f6; text-decoration: none; }
a:hover { text-decoration: underline; }
ul { padding-left: 20px; }