body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
}

header, main, footer {
    padding: 10px;
}

h1, h2 {
    text-align: center;
}

section {
    margin: 20px 0;
    padding: 10px;
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

a {
    color: #333;
    text-decoration: none;
    font-weight: bold;
}

a:hover {
    color: #007BFF;
}

footer {
    text-align: center;
    color: #777;
}
.button0 {
  border: 0;
  line-height: 2.5;
  padding: 0 20px;
  font-size: 1rem;
  text-align: center;
  color: #fff;
  text-shadow: 1px 1px 1px #000;
  border-radius: 10px;
  background-color: rgb(220 0 0 / 100%);
  background-image: linear-gradient(
    to top left,
    rgb(0 0 0 / 20%),
    rgb(0 0 0 / 20%) 30%,
    rgb(0 0 0 / 0%)
  );
  box-shadow:
    inset 2px 2px 3px rgb(255 255 255 / 60%),
    inset -2px -2px 3px rgb(0 0 0 / 60%);
}

.button0:hover {
  background-color: rgb(255 0 0 / 100%);
}

.button0:active {
  box-shadow:
    inset -2px -2px 3px rgb(255 255 255 / 60%),
    inset 2px 2px 3px rgb(0 0 0 / 60%);
}