* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  margin: 0;
  padding: 0;
}

button {
  width: 100%;
  font-size: 2em;
}
input,
button,
select {
  width: 100%;
  font-size: 2em;
}

table {
  border: 1px;
  border-collapse: collapse;
}

td,
th {
  border: 1px solid black;
}

/*div#content {*/
/*display: none;*/
/*}*/