* {
  box-sizing: border-box;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  background-image: url(../images/Lake-Louise-canada.jpg);
  background-color: #cccccc;
  height: 500px;
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  position: relative;
}
h3 {
  font-size: 18px;
  line-height: 34px;
  margin-left: 20px;
  font-family: Arial, Helvetica, sans-serif;
  color: rgb(51, 50, 50);
  background-color: rgba(163, 194, 194);
}

#content {
  width: 100%;
  max-width: 700px;
  margin: 0 auto;
  clear: both;
  background-color: rgba(163, 194, 194);
  border-radius: 8px;
}

h2 {
  text-align: center;
  font-family: Arial, Helvetica, sans-serif;
  font-weight: 700;
  color: rgb(70, 43, 78);
}

h1 {
  text-align: center;
  margin-left: 310px;
  margin-right: 310px;
  font-size: 30px;
  line-height: 49px;
  color: white;
  background-color: rgb(70, 43, 78);
  padding: 15px 32px;
  border-radius: 8px;
}
#start {
  background-color: rgb(70, 43, 78);
  position: absolute;
  top: 50%;
  left: 50%;
  padding: 15px 32px;
  font-size: 20px;
  text-align: center;
  color: white;
  border-radius: 8px;
  transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
}
#play,
#done {
  background-color: rgb(70, 43, 78);
  top: 50%;
  bottom: 50%;
  border-radius: 8px;
  color: white;
  padding: 15px 32px;
  text-align: center;
  text-decoration: none;
  display: block;
  font-size: 16px;
  margin-left: 20px;
  position: relative;
  cursor: pointer;
}
#text {
  display: inline;
  margin-left: 5px;
}
input[type='radio'] {
  width: 15px;
  margin-left: 20px;
}

/* Media queries*/
@media screen and (max-width: 640px) {
  body {
    width: 100%;
  }
  #logo {
    width: 100%;
    font-weight: 200;
  }
  .content {
    width: 100%;
    max-width: 640px;
    margin: 0 auto;
    clear: both;
  }
}

@media screen and (max-width: 768px) {
  body {
    width: 100%;
  }
  #content {
    padding: 40px;
  }
}

@media screen and (max-width: 980px) {
  body {
    width: 100%;
  }
  #content {
    padding: 60px;
  }
}