index.css

body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background-color: #121212;
  color: #ffffff;
}

header {
  background-color: #1e1e1e;
  color: #ffffff;
  padding: 20px;
  text-align: center;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
  margin-bottom: 20px;
}

main {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 20px;
}

h2 {
  text-align: center;
}

.topic-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-bottom: 20px;
}

.topic-btn {
  background-color: #1e90ff;
  color: #ffffff;
  text-decoration: none;
  padding: 10px 20px;
  border-radius: 5px;
  font-size: 1.2em;
  transition: background-color 0.3s ease;
}

.topic-btn:hover {
  background-color: #1473c7;
}

.code-container {
  background-color: #282c34;
  color: #abb2bf;
  font-size: large;
  border-radius: 5px;
  overflow: auto;
  margin-bottom: 20px;
  position: relative;
}

.code-container pre {
  margin: 0;
  font-family: 'Courier New', Courier, monospace;
  white-space: pre-wrap;
  word-break: break-all;
}

.copy-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  background-color: #1e90ff;
  color: #ffffff;
  border: none;
  border-radius: 5px;
  padding: 5px 10px;
  font-size: 14px;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.copy-btn:hover {
  background-color: #1473c7;
}

.hljs {
  background-color: #121212 !important;
}

footer {
  background-color: #1e1e1e;
  color: #ffffff;
  text-align: center;
  padding: 10px 0;
  position: fixed;
  width: 100%;
  bottom: 0;
}

footer p {
  margin: 0;
}