body {
    display: flex;
    min-height: 100vh;
    flex-direction: column;
}

.centered {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 1em;
}

h1 {
    color: #333;
    border-bottom: 3px solid #00b894;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

div {
    margin: 0.5rem 0.2rem;
}

fieldset {
    display: inline-block;
    border-style: solid;
    border-width: 2px;
    border-color: #DDD;
    border-radius: 4px;

}

button {
    padding: 12px 24px;
    background-color: #0ea5e9;
    color: white;
    border: 0;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

button:hover {
    background-color: #0284c7;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

button:active {
    transform: translateY(0);
    box-shadow: none;
}

div#div_metadata {
    display: none;
}

input, label, textarea {
    margin: 0.4rem 0;
}

footer {
    flex: 1;
    margin: 2em 0 0 0;
    padding: 2em 0 0 0;

    background-color: #EEE;
    font-size: 0.9em;
}

kbd {  /* from https://developer.mozilla.org/en-US/docs/Web/HTML/Element/kbd */
    background-color: #eee;
    border-radius: 3px;
    border: 1px solid #b4b4b4;
    box-shadow: 0 1px 1px rgba(0, 0, 0, .2),
                0 2px 0 0 rgba(255, 255, 255, .7) inset;
    color: #333;
    display: inline-block;
    font-size: .85em;
    font-weight: 700;
    line-height: 1;
    padding: 2px 4px;
    white-space: nowrap;
}
