* {
    box-sizing: border-box;
    padding: 0;
    margin: 0;
}

body {
    margin: 0;
}

main {
    width: 100vw;
    height: 100vh;
    padding: 1em;
    display: flex;
    flex-direction: column;
}

#container {
    margin-top: 1em;
    flex-grow: 1;
    overflow: hidden;
}

#dropzone {
    border: 1px dashed black;
    display: block;
    width: 100%;
    height: 100%;
}

#contents {
    border: 1px solid black;
    padding: 0 1em 1em 1em;
    width: 100%;
    height: 100%;
    overflow: auto;
}

.hidden {
    display: none !important;
}

#error {
    color: red;
}