html, body {
  height: 100%;
  width: 100%;
}

* {
  font-family: "Helvetica";
}

input {
  padding: 5px 5px; 
  border: gray solid 1px;
  border-radius: 4px;
  outline: none;
  font-size: 20px;
}

button {
  color: white;
  font-size: 20px;
  font-weight: 600;
  background: green;  
  text-decoration: none;
  padding: 5px 10px;
  border-radius: 5px;
  outline: none;
  border: none;
  cursor: pointer;
}