body{
  font-family: 'Courier New',monospace;
  font-size: 14px;
  background: #eee
}
*{
  margin: 0;
}
header{
  text-align: center;
  background-color: rgb(0, 248, 248);
  font-weight: bold;
  font-size: 30px;
  padding-top: 20px;
  padding-bottom: 20px;
}
.container{
  margin: 20px auto;
  width: 270px;
  background: #fff;
  padding: 15px;
  text-align: center;
}
#timer{
  background: #ddd;
  height: 120px;
  line-height: 120px;
  font-size: 40px;
  margin-bottom: 15px;
}
.btn{
  width: 80px;
  height: 45px;
  line-height: 45px;
  background-color: #ddd;
  font-weight: bold;
  cursor: pointer;
  user-select: none;
}
.controls{
  display: flex;
  justify-content: space-between;
}
.inactive{
  opacity: 0.6;
}
p{
  padding-left: 35%;
  font-size: 30px;
  padding-top: 30px;
  padding-bottom: 30px;
}