body {
  font-family: sans-serif;
  width: 400px;
  padding: 20px;
}

.container {
  width: 400px;
  height: 200px;
  background: #333;
  margin-bottom: 20px;
}

.box {
  background: #0AE;
  color: #F90;
  border-color: #F90;
}

/* align to right side */
#qunit {
  position: absolute;
  left: 0;
  top: 20px;
  margin-left: 440px;
  margin-right: 10px;
}


/* Boxes
------------------------- */

#ex2 .box {
  height: 100%;
}

#ex3 .box {
  width: 50%;
  height: 50%;
}

#ex4 .box,
#ex5 .box {
  width: 200px;
  height: 100px;
  border: 10px solid;
}


#ex5 .box {
  margin: 10px 20px 30px 40px;
}

#ex6 .box {
  width: 200px;
  height: 100px;
  padding: 10px 20px 30px 40px;
}

#ex7 .box {
  height: 100px;
  padding: 10px 20px 30px 40px;
}

#ex8 .box {
  position: relative;
  width: 66.6666%;
  height: 66.666%;
}

/* border box */
#ex9 .box {
  -webkit-box-sizing: border-box;
     -moz-box-sizing: border-box;
          box-sizing: border-box;
  height: 100%;
  border-style: solid;
  border-width: 10px 20px 30px 40px;
  padding: 10px 20px 30px 40px;
}

#hidden .box {
  display: none;
  width: 200px;
  height: 100px;
  padding: 10px 20px 30px 40px;
  margin: 10px 20px 30px 40px;
}

#percent .box {
  width: 200px;
  height: 100px;
  margin-top: 20%;
  margin-left: 10%;
}