style.css

* {
  box-sizing: border-box;
}

body {
  font-family: Arial, Helvetica, sans-serif;
}

/* Style the header */
.header {
  background-color: #f1f1f1;
  padding: 30px;
  text-align: center;
  font-size: 35px;
}

/* Create three unequal columns that floats next to each other */
.column {
  float: left;
  padding: 10px;
  height: 450px;
}

/* Left and right column */
.column.side {
  width: 25%;
}

/* Middle column */
.column.middle {
  width: 50%;
}

/* Clear floats after the columns */
/* .row:after {
  content: "";
  display: table;
  clear: both;
} */

/* Style the footer */
.footer {
  background-color: #f1f1f1;
  padding: 10px;
  text-align: center;
}

/* Responsive layout - makes the three columns stack on top of each other instead of next to each other */
@media (max-width: 600px) {
  .column.side,
  .column.middle {
    width: 100%;
  }
}

#test {
  top: 10%;
  width: 50%;
  height: 40%;
  /* float: center; */
  margin: 0 auto;

  position: relative;
  transform: translateY(17%);
}

#test2 {
  top: 10%;
  width: 100%;
  height: 50%;
  float: center;
  margin: 0 auto;

  position: relative;
  transform: translateY(10%);
}

#test3 {
  top: 10%;
  width: 100%;
  height: 50%;
  float: center;
  margin: 0 auto;

  position: relative;
  transform: translateY(10%);
}