body {
    background-color: #111;
    color: white;
    text-align: center;
    font-family: Arial;
}

.container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}

.box {
    width: 250px;
    height: 150px;
    border: 2px solid pink;
    margin: 15px;
    padding: 10px;
}

/* Hover */
.hover {
    background-color: purple;
    transition: 0.3s;
}

.hover:hover {
    background-color: red;
}

/* Z-index */
.red {
    width: 80px;
    height: 80px;
    background: red;
    position: relative;
    z-index: 2;
}

.blue {
    width: 80px;
    height: 80px;
    background: blue;
    position: relative;
    top: -40px;
    left: 40px;
    z-index: 1;
}

/* Rounded */
.rounded {
    background: lightblue;
    border-radius: 15px;
}

/* Shadow */
.shadow {
    background: gray;
    box-shadow: 5px 5px 10px black;
}

/* Fonts */
.font {
    font-family: 'Courier New';
}

/* Position */
.position {
    position: relative;
}

.small-box {
    width: 50px;
    height: 50px;
    background: yellow;
    position: absolute;
    bottom: 10px;
    right: 10px;
}