body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial;
  background: #f7f9fc;
  margin: 0;
  padding: 0;
}

.container {
  max-width: 900px;
  margin: auto;
  padding: 40px 20px;
}

h1 {
  font-size: 2.2rem;
  margin-bottom: 10px;
}

h2 {
  margin-top: 40px;
  color: #2c3e50;
}

p {
  color: #555;
}

a {
  color: #0073e6;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.navbar {
  background: white;
  padding: 15px 20px;
  border-bottom: 1px solid #ddd;
}

.card {
  background: white;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
  margin-top: 20px;
}

.mnemonic {
  font-size: 1.2rem;
  font-weight: bold;
  color: #222;
  margin-bottom: 10px;
}