html, body {
    width: 100%;
    height: 100%;
    margin: 0px;
    box-sizing: border-box;
}

.app_container {
    padding: 0px 15px;
    margin-top: 16px;
}

.app_navigation {
    margin-bottom: 16px;
}

.app_container {
    margin: 0px auto;
}

.registration_container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.article_container, .page_header_container, .input_value, .input_button {
    box-shadow: 2px 2px 5px lightgray;
}

.article_container:hover {
    box-shadow: 2px 2px 5px lightsteelblue;
}

.article_container:last-child, .input_container {
    margin-bottom: 16px;
}

.input_button {
    float: right;
}