body {
  background-color: #c0c0c0;
  font-family: 'Courier New', Courier, monospace;
  margin: 0;
  padding: 2rem;
}

.window {
  max-width: 800px;
  margin: auto;
  border: 2px solid #000;
  background-color: #fff;
  box-shadow: 5px 5px 0 #333;
}

.title-bar {
  display: flex;
  justify-content: space-between;
  background-color: navy;
  color: white;
  padding: 0.5rem;
  font-weight: bold;
}

.controls button {
  background: gray;
  color: white;
  border: none;
  padding: 0.2rem 0.5rem;
  margin-left: 0.2rem;
  cursor: pointer;
}

.window-body {
  padding: 1rem;
  background-color: #f4f4f4;
}

h1 {
  color: green;
  font-size: 1.8rem;
}

h2 {
  color: #222;
  border-bottom: 1px dashed #aaa;
}

.mono {
  color: #444;
  font-size: 0.9rem;
}

.highlight {
  color: goldenrod;
  font-weight: bold;
}

.boot {
  background-color: black;
  color: lime;
  padding: 0.5rem;
  margin-bottom: 1rem;
}


.cursor {
  display: inline-block;
  animation: blink 1s step-start infinite;
  color: lime;
  margin-left: 2px;
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}