* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  -o-box-sizing: border-box;
}
hr {
  margin-block: 20px;
}
/* Assignment 01 */
.assign-1 {
  background-color: #f2f2f4;
  width: 500px;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
  font-family: arial;
  padding: 40px;
  font-size: 20px;
  margin-top: 40px;
  transition: 0.5s linear;
  -webkit-transition: 0.5s linear;
  -moz-transition: 0.5s linear;
  -o-transition: 0.5s linear;
}
.assign-1:hover {
  margin-top: 0px;
}
.child {
  background-color: #dededc;
  padding: 20px;
  margin-top: 5px;
  transition: 0.5s linear 0.5s;
  -webkit-transition: 0.5s linear 0.5s;
  -moz-transition: 0.5s linear 0.5s;
  -o-transition: 0.5s linear 0.5s;
}
.assign-1:hover .child {
  margin-top: 30px;
}
/* Assignment 02 */
.assign-2 {
  background-color: #eee !important;
  text-align: center;
  width: 400px;
  font-size: 20px;
  margin-left: auto;
  margin-right: auto;
  border: none !important;
  position: relative;
  font-size: 0 !important;
}
.assign-2::before {
  content: "Elzero";
  font-size: 20px;
  color: #333;
  font-weight: bold;
  font-family: "Arial";
}
/* Assignment 03 */
:root {
  --mainColor: #009688;
  --mainPadding: 10px;
}
.assign-3 {
  width: 80%;
  margin: 10px auto 0px;
  border-color: black;
  border: 2px solid var(--mainColor, black);
  color: var(--mainColor, red);
  font-family: arial;
  font-size: 20px;
  text-align: left;
  padding: 20px;
}