* {

    margin: 0; padding:0; border: 0;
    box-sizing: border-box;

}

body {
    background-color: hsl(355,90%,80%);
    font-family: verdana;
    color: hsl(200,90%,40%)
    }

h1 {

    display: flex;

}

h1 span {

flex: 1 0 auto;
padding: 12px 0;
text-align: center;
font-size: 5em;
background-color: hsl(200 100% 100% / .4);
margin: 8px;
}

p.subtitle {

    background-color: rgba(255, 255, 255, .4);
    text-align: center;
    padding: 12px;
    margin: 8px;
    font-size: 2em;
    font-variant: small-caps;
    color: hsl(200,90%,30%);

}

section.examples {

    margin: 8px;
    min-height: 200px;
    background-color: rgba(255, 255, 255, .6);
    padding: 4px 0;
    display: flex;
    flex-flow: row wrap;
    justify-content: center;
}

.examples div {

    border: 4px solid #345;
    margin: 8px;
    min-height: 200px;
    flex: 0 0 28%;
    aspect-ratio: 16 / 9;
    min-width: 300px;

}

div.example1 { /* border-radius*/

    width: 240px; height: 240px;
    min-width: 240px; max-width: 240px;
    border-radius: 60px/20px;

}

div.example2 { /* stripes out of gradients*/

    background-image: repeating-linear-gradient(45deg, #FF69B4 0px, #FF69FB 20px, #FFFF00 20px, #FFFF00 40px);



}

div.example3 { /*transition color on hover*/

    background-color: purple;
    transition: background-color .4s ease-in;
    
}
div.example3:hover {
    background-color: darkred;
}

div.example4 {
    background-color: tan;
    cursor: wait;
}

div.example5 {
    background-color: whitesmoke;
    box-shadow: 5px 10px silver;
}

div.example6 {

    width: 80px;
    height: 80px;
    background: lightblue;
    animation: sizingAnimation 5s infinite;

}

@keyframes sizingAnimation {

    from { background-color: lightblue; }
    to { background-color: darkblue; }
}