* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  -o-box-sizing: border-box;
}
body {
  margin: 20px;
  font-family: arial;
}
hr {
  margin-top: 30px;
  margin-bottom: 30px;
}
/* Assignment 01 */
.assign-1 {
  /* Set the element's width to 100px */
  width: 100px;
  /* Set the element's height to 100px */
  height: 100px;
  /* Center the element horizontally */
  margin-left: auto;
  margin-right: auto;
  /* Set the background to #eeeeee */
  background-color: #eeeeee;
  /* Center the text "Elzero" using flexbox properties */
  display: flex;
  justify-content: center;
  align-items: center;
  /* Change the radius of border */
  border-radius: 50%;
  /* Add the prefixes for border-radius */
  -webkit-border-radius: 50%;
  -moz-border-radius: 50%;
  -o-border-radius: 50%;
  /* Add box-shadow to this element */
  box-shadow: 5px 0px 0px 0px #ff5722, -5px 0px 0px 0px #03a9f4;
  /* Add the prefixes for box-shadow */
  -webkit-box-shadow: 5px 0px 0px 0px #ff5722, -5px 0px 0px 0px #03a9f4;
  -moz-box-shadow: 5px 0px 0px 0px #ff5722, -5px 0px 0px 0px #03a9f4;
  -o-box-shadow: 5px 0px 0px 0px #ff5722, -5px 0px 0px 0px #03a9f4;
}
/* Assignment 02 */
.assign-2 {
  /* Set the width of the element to 600px and its height to 300px. */
  width: 600px;
  height: 300px;
  /* Set the background color to #eeeeee*/
  background-color: #eeeeee;
  /* Center the parent element on the page horizontally. */
  margin-left: auto;
  margin-right: auto;
  /* Use the Flexbox layout */
  display: flex;
  /* Wrap the inner elements */
  flex-wrap: wrap;
  /* Add vertical spacing between the elements */
  align-content: space-between;
  /* Some spacings */
  padding-top: 10px;
  padding-bottom: 10px;
}
/* Create the same elements with the same shapes and positions.  */
.assign-2 div {
  /* Set the each element's width to (600px - 60px) / 6 */
  width: calc((100% - 40px) / 3);
  /* Set the background color to  #f44336*/
  background-color: #f44336;
  /* Set the text color to #FFF */
  color: #fff;
  /* Center the text horizontally */
  text-align: center;
  /* Fit the height to the text */
  height: fit-content;
  /* Some inner spacings */
  padding: 10px;
  /* Center the elements in the element horizontally */
  margin-left: auto;
  margin-right: auto;
  /* Set the font-size to 20px */
  font-size: 20px;
}
/* Assignment 03 */
.assign-3 {
  /* Set the width of the parent element to 600px and its height to 300px. */
  width: 600px;
  height: 300px;
  /* Center the parent element on the page horizontally. */
  margin-left: auto;
  margin-right: auto;
  /* Set the background color to #eee */
  background-color: #eee;
  /* Add padding */
  padding: 10px;
  /* Set the display to flex */
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.assign-3 div {
  /* Set the background color to #607d8b */
  background-color: #607d8b;
  /* Set the text color to #FFF */
  color: #fff;
  /* Center the text horizontally */
  text-align: center;
  /* Set the width to 600px - padding / 3 */
  width: calc((100% - 20px) / 3);
  /* Add padding */
  padding: 10px;
  /* Set the font-size to 20px */
  font-size: 20px;
  /* Center the text both vertically and horizontally */
  display: flex;
  align-items: center;
  justify-content: center;
}
/* Reorder the child elements. */
.assign-3 .one {
  order: 6;
  align-self: flex-end;
}
.assign-3 .two {
  order: 5;
}
.assign-3 .three {
  order: 2;
  align-self: flex-start;
}
.assign-3 .four {
  order: 3;
}
.assign-3 .five {
  order: 4;
}
.assign-3 .six {
  order: 1;
}
/* Assignment 04  */
.assign-4 {
  /* Set the parent element's width to 600px and its height to 300px. */
  width: 600px;
  height: 300px;
  /* Center the parent element on the page horizontally */
  margin-left: auto;
  margin-right: auto;
  /* Set the background-color to #eee */
  background-color: #eee;
  /* Some padding */
  padding: 10px;
  /* Organize the elements to create the required shape. */
  display: flex;
  flex-direction: column;
  justify-content: space-around;
}
.assign-4 div {
  /* Set the background-color to #009688 */
  background-color: #009688;
  /* Change the text color to #FFF */
  color: #fff;
  /* Set the width of the element to 100% */
  /* Change the display to flex to center the text both vertically and horizontally */
  display: flex;
  align-items: center;
  justify-content: center;
  /* Set the initial length of the element */
  flex-basis: calc((100% - 20px) / 3);
  padding: 15px;
}
.assign-4 .one {
  align-self: flex-end;
}
.assign-4 .two {
  width: 50%;
}
.assign-4 .three {
  align-self: flex-end;
}
/* Assignment 05 */
.assign-5 {
  /* Set the parent element's width to 600px and its height to 300px. */
  width: 600px;
  height: 300px;
  /* Center the parent element on the page horizontally. */
  margin-left: auto;
  margin-right: auto;
  background-color: #eee;
  /* Creating the exact shape */
  display: flex;
  justify-content: space-between;
  align-items: stretch;
  /* Some padding */
  padding: 10px;
  gap: 50px;
}
.assign-5 div {
  color: #fff;
  width: calc(100% / 4);
  /* Center text both horizontally & vertically */
  display: flex;
  justify-content: center;
  align-items: center;
  /* Set the height of the child elements to half */
  height: 50%;
}
.assign-5 .one {
  background-color: #ff9800;
  order: 2;
}
.assign-5 .two {
  background-color: #8bc34a;
  order: 3;
  align-self: flex-end;
}
.assign-5 .three {
  background-color: #795548;
  order: 4;
}
.assign-5 .four {
  background-color: #673ab7;
  order: 1;
  align-self: flex-end;
}
/* Assignment 06 */
:root {
  --primary-color: #eee;
  --secondary-color: #ddd;
  --space-10: 10px;
}
.assign-6 {
  background-color: var(--primary-color);
  padding: var(--space-10);
  width: 800px;
  margin-left: auto;
  margin-right: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-10);
}
.assign-6 .header {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  gap: var(--space-10);
}
.assign-6 .header .logo {
  background-color: var(--secondary-color);
  padding: 15px 50px;
  font-size: 16px;
}
.assign-6 .header .links {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  list-style: none;
  gap: var(--space-10);
  background-color: var(--secondary-color);
  flex-grow: 1;
  padding: 15px 20px;
}
.main-area {
  display: flex;
  gap: var(--space-10);
  height: 400px;
}
.main-area .content {
  background-color: var(--secondary-color);
  padding: calc(5px + var(--space-10));
  flex-grow: 2.5;
}
.main-area .sidebar {
  background-color: var(--secondary-color);
  padding: calc(5px + var(--space-10));
  flex-grow: 1.5;
}
.footer {
  background-color: var(--secondary-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-10);
}
.copyright,
.design {
  padding: calc(var(--space-10) - 5px);
}