* {
  font-family: "Segoe UI",Arial,sans-serif;
}

html, body {
  width: 100%;
  height: 100%;
  /* remove the extra whites around */
  margin: 0;
}

canvas {
  background-color: black;
  width: 100%;
  height: 100%;
  display: block;
}

.controls
{
  bottom: 0;
  left: 0;
  margin: 0;
  position: absolute;
  width: 100%;
  text-align: center;
}

button {
  background-color: #49a171;
  border: none;
  color: white;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 22px;
  cursor: pointer;
  border-radius: 10%;
  min-width: 80px;
  margin-bottom: 20px;
  text-align: center;
}

.modal {
  display: none;
  position: fixed;
  z-index: 1;
  padding-top: 100px; /* Location of the box */
  left: 0;
  top: 0;
  width: 100%; /* Full width */
  height: 100%; /* Full height */
  overflow: auto; /* Enable scroll if needed */
  background-color: rgb(0,0,0); /* Fallback color */
  background-color: rgba(0,0,0,0.4); /* Black w/ opacity */
}

/* Modal Content */
.modal-content {
  position: relative;
  background-color: #fefefe;
  margin: auto;
  padding: 0;
  border: 1px solid #888;
  border-radius: 20px;
  width: 30%;
  box-shadow: 0 4px 8px 0 rgba(0,0,0,0.2),0 6px 20px 0 rgba(0,0,0,0.19);
  -webkit-animation-name: animatetop;
  -webkit-animation-duration: 0.4s;
  animation-name: animatetop;
  animation-duration: 0.4s
}

/* Add Animation */
@-webkit-keyframes animatetop {
  from {top:-300px; opacity:0} 
  to {top:0; opacity:1}
}

@keyframes animatetop {
  from {top:-300px; opacity:0}
  to {top:0; opacity:1}
}

.modal-header {
  padding: 2px 16px;
  background-color: #49a171;
  border-radius: 20px;
  color: white;
}

.modal-body {padding: 2px 16px;}