*{
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, sans-serif;
  color: black;
  background-color: white;
  display: grid;
  place-items: center;
}

h1 {
  text-align: center;
}

table {
  background-color: #a9c9ff;
  padding: 10px;
  text-align: center;
  border-radius: 10px;
}

thead * {
  background-color: blueviolet;
  border: 1px solid black;
  padding: 10px;
  color: white;
}
tbody tr td:nth-of-type(3) {
  font-weight: bold;
}

tfoot * {
  border: 1px solid black;
  padding: 10px;
  font-weight: 800;
  color: white;

  background-color: blueviolet;
}

tbody * {
  border: 1px solid black;
  padding: 10px;
}

.btn-container {
  display: flex;
  align-items: center;
  gap: 20px;
  margin: 20px 0;
}

button {
  width: 150px;
  padding: 10px;
  font-size: larger;
}

#percentage {
  font-size: larger;
  font-weight: bold;
  background-color: blueviolet;
  color: white;
  padding: 8px 40px;
  border-radius: 10px;
  width: 280px;
}

footer {
  margin-top: 20px;
}

footer a {
  color: grey;
  text-decoration: none;
}