* {
  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;
}

#checkbox {
  display: flex;
  justify-content: center;
  font-size: 30px;
  font-weight: bold; 
}

#fill {
  transform: scale(2);
  cursor: pointer;
  width: 50px;
  margin-top: 11px;
}

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

#chat {
  padding-top: 20px;
}
/*div#content {*/
/*display: none;*/
/*}*/