body {
  margin: 0;
  padding: 0;
  font-size: 16px;
  line-height: 1.5;
  font-family: Arial, sans-serif;
  background-color: #000000;
  color: #ffffff;
}
header{
  padding: 1rem;
  text-align: center;
}
footer{
  padding: 1rem;
  text-align: center;
}
main.center {
  padding: 1rem;
  text-align: center;
}
main.left {
  padding: 1rem;
  text-align: left;
}
table, tr, td{
  border: 1px solid #ffffff;
  border-collapse: collapse;
  padding: 5px;
}
h1 {
  text-transform: uppercase;
  font-size: 2.5rem;
  margin: 0;
}
p {
  font-size: 1rem;
  margin-top: 0;
}
p.red {
  font-size: 1rem;
  margin-top: 0;
  color: rgb(255, 0, 0);
}
input[type="text"], button {
  font-size: 1rem;
  padding: 0.5rem;
  background-color: #212121;
  color: #ffffff;
  border: none;
  border-radius: 0.25rem;
}
button {
  cursor: pointer;
}
.toggle-btn {
  font-size: 1rem;
  padding: 0.5rem;
  background-color: #212121;
  color: #ffffff;
  border: none;
  border-radius: 0.25rem;
}
hr {
  width:45%;
  margin:0 auto;
}
a:link {
  color: rgb(0, 255, 0);
  background-color: transparent;
  text-decoration: none;
}
a:visited {
  color: rgb(0, 255, 0);
  background-color: transparent;
  text-decoration: none;
}
a:hover {
  color: rgb(255, 255, 0);
  background-color: transparent;
  text-decoration: underline;
}
a:active {
  color: rgb(255, 63, 0);
  background-color: transparent;
  text-decoration: underline;
}
/* Regole di stile per il layout su dispositivi mobili */
@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }
  p {
    font-size: 0.9rem;
  }
  input[type="text"], button {
    font-size: 0.8rem;
    padding: 0.5rem;
  }
}