body {
  background: linear-gradient(120deg, #e0f2fe 0%, #f9fafb 100%);
  font-family: 'Segoe UI', 'Arial', sans-serif;
  color: #222;
  margin: 0;
  padding: 0;
}

main {
  max-width: 650px;
  margin: 32px auto;
  background: #fff;
  border-radius: 20px;
  box-shadow: 0 6px 36px #0001;
  padding: 28px;
}

h1 {
  color: #0284c7;
  font-size: 2.1em;
  margin-bottom: 0.3em;
  letter-spacing: -1px;
}
.subtitle {
  color: #10b981;
  margin-bottom: 1.5em;
  font-size: 1.2em;
  text-align: center;
}
section {
  margin-bottom: 2em;
}
ul, ol {
  margin-left: 1.5em;
  margin-bottom: 1em;
}
blockquote {
  background: #f1f5f9;
  border-left: 5px solid #0ea5e9;
  padding: 0.7em 1em;
  margin: 1em 0;
  border-radius: 9px;
  font-style: italic;
}
.visual {
  text-align: center;
  margin-bottom: 1em;
}
footer {
  text-align: center;
  font-size: 1em;
  color: #64748b;
  margin-top: 2.5em;
}