body {
  background: #121212;
  color: #00ff99;
  font-family: "Courier New", monospace;
  padding: 20px;
  text-align: center;
}

h1 {
  margin-bottom: 20px;
  font-weight: 900;
}

#codeInput {
  width: 90%;
  height: 250px;
  background: #1e1e1e;
  border: none;
  color: #00ff99;
  padding: 10px;
  font-size: 16px;
  resize: vertical;
  border-radius: 8px;
  box-shadow: 0 0 10px #00ff99aa;
  margin-bottom: 15px;
}

#runBtn {
  background: #00ff99;
  border: none;
  padding: 10px 25px;
  font-size: 18px;
  cursor: pointer;
  border-radius: 8px;
  font-weight: bold;
  color: #121212;
  box-shadow: 0 0 15px #00ff99;
  transition: background 0.3s ease;
}

#runBtn:hover {
  background: #00cc7a;
}

#output {
  margin-top: 25px;
  background: #1e1e1e;
  min-height: 150px;
  padding: 15px;
  border-radius: 8px;
  text-align: left;
  font-size: 16px;
  white-space: pre-wrap;
  box-shadow: 0 0 15px #00ff99aa;
}