body{
  font-family: Arial, sans-serif;
  line-height:1.6;
  margin:0; padding:0;
  background:#f5f7fb; color:#222;
}
header{
  background:#222; color:#eaeaea;
  padding:16px 0; text-align:center;
}
.container{
  max-width: 900px; margin: 24px auto;
  background:#fff; padding: 24px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.06);
  border-radius:10px;
}
h1{ color:#0f82ab; margin: 16px 0; }
h2{ color:#444; margin-top:18px; }
.content p{ margin-bottom:16px; }
.feature-grid{
  display:grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
  margin: 12px 0 8px;
}
.card{
  background:#f2f8fb; border:1px solid #dde9ef;
  border-radius:10px; padding:12px 14px;
}
.steps{ padding-left: 18px; }
.steps li{ margin-bottom: 8px; }
.assumptions h2{ margin-bottom:6px; }
.assumptions p{ margin-top:0; }