* {
  box-sizing: border-box;
  padding: 0;
  margin: 0;
}

h1 {
  font-weight: normal;
  font-size: 50px;
  padding: 0;
  margin: 0px 0px 10px 0px;
}

.header p {
  font-size: 1rem;
  margin-bottom: 4px;
}

.header a {
  font-size: 0.9rem;
  color: black;
  text-decoration: none;
  border-bottom: 1px solid #333;
}

.header a:hover {
  border-bottom: 0px;
}

.header img {
  height: 1rem;
  margin-left: 4px;
}

.header {
  margin-bottom: 20px;
}

#container {
  padding: 40px 40px;
  font-size: 18px;
}

#indicator {
  display: flex;
  align-items: center;
  margin-bottom: 10px;
}

#indicator .generation {
  display: inline-block;
  margin-right: 14px;
}

#indicator .progress {
  display: inline-block;
  height: 24px;
  width: 500px;
  background-color: #f0f0f0;
  border: 1px solid #ccc;
}

#indicator .progress-body {
  display: block;
  height: 100%;
  background-color:aquamarine;
}

#controller ul {
  list-style: none;
}

#controller ul li {
  padding: 4px 0px;
  display: flex;
  align-items: center;
}

#controller {
  margin-bottom: 10px;
}

#controller label {
  display: inline-block;
  margin: 0;
  width: 100px;
  font-size: 1rem;
}

#controller input {
  display: inline-block;
  width: 100px;
  font-size: 0.9rem;
  padding-left: 2px;
}

#controller button {
  display: inline-block;
  width: 200px;
  height: 30px;

  border-radius: 4px;
  border: 1px solid #ccc;
  background-color: #fff;
  cursor: pointer;
  outline: none;
}

#controller button:hover {
  background-color: #f0f0f0;
}

#playground {
  display: flex;
  justify-content: flex-start;
  flex-wrap: wrap;
}

#playground svg {
  box-sizing: border-box;
  margin-right: 2px;
  margin-bottom: 2px;
}

#playground svg.unplaced {
  margin-top: 10px;
}