#astar{
  display: flex;
  margin: auto;
  width: 50%;
}
#canvas{
box-shadow: 0 7px 37px -5px #00C4F0;
width: 100%;
}
#canva {
width: 550px;
}
#buttons{
width: 20%;
  margin-left: 10%;
}
.text{
margin: 0 0 -15px 5px;
font-size: 15px;
}

button, #sizeM {
line-height: 2;
align-items: center;
text-align: center;
padding: 17px 0 17px 0;
margin-bottom: 8%;
  width: 100%;
  box-sizing: border-box;
  -webkit-appearance: none;
     -moz-appearance: none;
          appearance: none;
  background-color: transparent;
  border: 2px solid #1b6170;
  border-radius: 0.6em;
  color: #fff;
  cursor: pointer;
  -webkit-align-self: center;
      -ms-flex-item-align: center;
          align-self: center;
  font-size: 1rem;
  font-weight: 400;
  line-height: 1;
  text-decoration: none;
  text-align: center;
  text-transform: uppercase;
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  box-shadow: 0 0 40px 40px #1b6170 inset, 0 0 0 0 #1b6170;
  transition: all 150ms ease-in-out;
}
button:hover, button:focus {
  color: #fff;
  outline: 0;
}
button:hover {
  box-shadow: 0 0 10px 0 #0d6073 inset, 0 0 10px 4px #0d6073;
}

@media screen and (max-width: 970px), screen and (max-height: 500px) {
  #canvas{
    width: 400px;
}
button{
  font-size: 10px;
}
#astar {
  width: 60%;
}
}