@import url('https://fonts.googleapis.com/css2?family=VT323&display=swap');

body {
  background-color: #000000;
  color: #ffffff;
  font-family: 'VT323', 'Courier New', monospace;
  font-size: 24px;
  line-height: 1.2;
  margin: 0;
  padding: 20px;
  display: flex;
  justify-content: center;
}

.btx-screen {
  width: 100%;
  max-width: 800px;
  background-color: #000000;
  border: 4px solid #0000ff;
  padding: 10px;
  box-sizing: border-box;
}

.header {
  background-color: #0000ff;
  color: #ffff00;
  padding: 4px 8px;
  display: flex;
  justify-content: space-between;
  font-weight: bold;
}

.title-banner {
  background-color: #00ffff;
  color: #000000;
  text-align: center;
  font-size: 32px;
  font-weight: bold;
  padding: 6px;
  margin: 15px 0;
}

.content {
  margin: 20px 0;
}

.yellow { color: #ffff00; }
.cyan   { color: #00ffff; }
.green  { color: #00ff00; }
.red    { color: #ff0000; }
.white  { color: #ffffff; }

.menu-list {
  list-style: none;
  padding: 0;
}

.menu-list li {
  margin-bottom: 10px;
}

.menu-list a {
  text-decoration: none;
  display: inline-block;
}

.menu-list a:hover .cyan,
.menu-list a:hover .green,
.menu-list a:hover .yellow,
.menu-list a:hover .white {
  background-color: #ffffff;
  color: #000000;
}

.key {
  background-color: #ff0000;
  color: #ffffff;
  padding: 0 6px;
  font-weight: bold;
  margin-right: 4px;
}

.footer {
  border-top: 2px solid #00ff00;
  margin-top: 30px;
  padding-top: 10px;
  color: #00ff00;
  display: flex;
  justify-content: space-between;
}

a.btx-link {
  color: #ffff00;
  font-weight: bold;
  text-decoration: underline;
}

a.btx-link:hover {
  background-color: #ffff00;
  color: #000000;
  text-decoration: none;
}