* { box-sizing: border-box }
body {
    margin: 0;
    font-size: 16px;
    font-family: 'Lato', sans-serif;
    color: hsl(0,0%,30%);
}

h1 {
    font-size: 3rem;
    text-align: center;
    text-shadow: 0.05em 0.05em 0.5em navy;
    border-bottom: 5px double black;
    height: 12vh;
    margin-bottom: 0;
}

input[type=text] {
    font-size: 1rem;
    width: 90%;
    margin: 0.5em;
    margin-left: 5%;
    margin-right: 5%;
    padding: 0.24em;
    border: thin solid black;
}

button {
    font-size: 1rem;
    padding: 0.25em 0.5em;
    margin: 0.5em;
    margin-right: 5%;
    float: right;
}

#add-contact {
    position: relative;
    width: 25vw;
    float: left;
    border: 5px double black;
    border-left: none;
    border-right: none;
    border-top: none;
    min-height: 78vh;
}

#do-search {
    width: 75vw;
    float: right;
    border: 5px double black;
    border-top: none;
    border-right: none;
    min-height: 78vh;
}

#add-contact::after,
#do-search::after
{
    content: " ";
    display: "block";
    float: none;
    clear: both;
}

#do-search #results {
    padding: 0.5em;
}