* {
    box-sizing: border-box;
}

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

.box02 {
    color: red;
}

.box03 {
    color: rgb(100, 224, 72);
}

.box04 {
    color: #137ce6;
    font-weight: bold;
}

.box05 {
    font-size: 18px;
}

.box06 {
    font-size: 24px;
    font-style: italic;
}

.box07 {
    background-color: #4d210d;
    color: white;
}

.paragraph01 {
    text-align: center;
    line-height: 32px;
}

.paragraph02 {
    text-transform: uppercase;
    text-align: justify;
}

.box08 {
    height: 300px;
    width: 400px;
    border: 1px solid purple;
    padding: 30px;
}

.box09 {
    height: 200px;
    width: 500px;
    background-color: #db3535;
    margin: 100px;
}

.box10 {
   display:none; 
}

.box11{
    width: 100%;
    height: 150px;
    background-color: #137ce6;
    padding: 50px;
    border: 10px solid yellow;
}

.box12 {
    visibility: hidden;
 }

 .box13 {
    width: 200px;
    height: 500px;
    background-color: greenyellow;
    opacity: 0.5;
 }

.box14 {
     width: 400px;
     height: 300px;
     position: relative;
     background-color: lightblue;
     margin-bottom: 50px;
 }

.box14 > div {
    width: 100px;
    height: 100px;
    display: block;
    position: absolute;
    background-color: pink;
    top: 50px;
    right: 10px;
 }

 .button01 {
     width: 300px;
     height: 100px;
     cursor: pointer;
 }

 .button01:active {
     color: rgb(47, 0, 255);
 }

 .button02 {
    width: 200px;
    height: 50px;
    cursor: pointer;
}

.button02:hover {
    background-color: brown;
}

.box15 {
    width: 200px;
    height: 500px;
    background-color: aqua;
    cursor: pointer;
    margin-top: 200px;
}