body {
  font-family: system-ui, sans-serif;
  margin: 0;
  padding: 0;
  background: #ecf5ff;
}

header{
  background: #ecf5ff;
  text-align: center;
}

p {
  font-size: 1.2rem;
}

blockquote.citation {
  border-left: 4px solid #999;
  background: #f7f7f7;
  padding: 0.75em 1em;
  margin: 1em 0;
  overflow-x: auto;  
  overflow-y: hidden;   
  white-space: nowrap;  
  display: block;
}
blockquote.citation .label {
  font-size: 0.9em;
  color: #555;
  margin-bottom: 0.25em;
}

main{
  background: #ecf5ff;
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px;
}

.math-scroll {
  overflow-x: auto;  
  overflow-y: hidden;   
  white-space: nowrap;  
  display: block;
}

.math-scroll .mjx-container {
  display: inline-block;
}

footer{
  background: #ffffff;
  text-align: center;
    
}

header {
  background: #ffffff;
  margin-top: 24px;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

h1 {
  margin-top: 0;
}

button {
  padding: 8px 16px;
  font-size: 16px;
  cursor: pointer;
}

#message {
  margin-top: 16px;
  font-weight: bold;
  color: #007acc;
}