html,body {
  height: 100%;
  margin: 0;
}

body {
  text-align: center;
  font-family: Arial, Helvetica, sans-serif;
}

h1 {
  color: red;
  text-shadow: 1px 2px 2px yellow;
  clear: left;
}

button {
  padding: 10px;
  margin: 20px;
  font-size: x-large;
  border-radius: 10px;
  background-color: black;
  color: white;
/*  box-shadow: 1px 2px 4px blue;*/
}
    
table {
  border-style: none;
  margin: auto;
}

tr {
  border-style: none;
}

.square {
  background-color: red;
  margin: auto;
  width: 150px;
  height: 150px;
}

.t {
  background-color: white;
  border-style: solid;
  font-size: x-large;
  padding: 0px 6px;
}

#board {
  background-color: yellow;
  border-style: none;
  margin: auto;
}

.logo {
  display: block;
  padding: 10px;
}