* {
    font-family: 'Lucida Sans', 'Lucida Sans Regular', 'Lucida Grande', 'Lucida Sans Unicode', Geneva, Verdana, sans-serif;
}

header {
    background-image: url(./img/shell.png);
    background-color: maroon;
    background-blend-mode: difference;
    background-position: center;
    background-size: cover;
    text-align: center;
    color: white;
    text-shadow: 1px 2px 3px black;
}

.container {
    width: 80%; 
    display: flex;
    margin: 0 auto;
    flex-direction: column;
    justify-content: center;
    padding-left: 3%;
}

#form {
    margin: 10% auto;
    padding: 2%;
    background-color: seashell;
}

fieldset {
    margin-bottom: 20px;
    padding: 20px;
}

input, 
label {
    margin: 10px;;
}

legend {
    padding: 15px;
    border: 2px dotted lightgrey;
    line-height: 1.5;
}

#result_div {
    background-color: snow;
}

#fib_list{
    background-color: rgb(29, 137, 131);
    color: white;
}

li {
    margin: 0 0 5px 0;
}

li::marker {
    color: lightgrey;
}


/* MEDIA QUERIES */

@media(min-width: 768px) {
    header {
        font-size: 1.5em;
    }
}

@media(min-width: 1200px) {
    #form {
        width: 80%;
        margin: 5% auto;
    }
}