html,
body {
  margin: 0;
  padding: 0;
  background: #003366;
  color: #000000;
  font-family: "Times New Roman", Times, serif;
  font-size: 16px;
}

.page-frame {
  width: 760px;
  margin: 40px auto;
  border: 3px ridge #ffffff;
  background: #c0c0c0;
}

.top-bar {
  background: navy;
  color: white;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 14px;
  font-weight: bold;
  padding: 6px;
  border-bottom: 2px solid #808080;
  letter-spacing: 1px;
}

.content {
  padding: 30px;
  text-align: center;
}

.box {
  background: #ffffcc;
  border: 2px inset #808080;
  padding: 25px;
  min-height: 220px;
}

marquee {
  background: #000000;
  color: #00ff00;
  font-family: "Courier New", Courier, monospace;
  padding: 4px;
  border: 1px solid #00ff00;
  margin-bottom: 25px;
}

h1 {
  font-size: 42px;
  color: #990000;
  text-shadow: 1px 1px #ffffff;
  margin: 30px 0;
}

button {
  font-family: Arial, Helvetica, sans-serif;
  font-size: 24px;
  font-weight: bold;
  padding: 8px 35px;
  background: #dcdcdc;
  border-top: 3px solid #ffffff;
  border-left: 3px solid #ffffff;
  border-right: 3px solid #404040;
  border-bottom: 3px solid #404040;
  cursor: pointer;
}

button:active {
  border-top: 3px solid #404040;
  border-left: 3px solid #404040;
  border-right: 3px solid #ffffff;
  border-bottom: 3px solid #ffffff;
}

.result {
  margin-top: 30px;
  font-size: 34px;
  font-weight: bold;
  color: #000080;
}

.footer {
  font-size: 12px;
  color: #333333;
  margin-top: 20px;
}