#app {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
    -ms-flex-direction: column;
    flex-direction: column;
    height: 88vh;
    -webkit-box-shadow: 0 1px 4px 2px #c3c3c3;
    box-shadow: 0 1px 4px 2px #c3c3c3;
    background: #909090;
    border-radius: 5px;
}

#toolbar {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    background-color: rgba(144, 144, 144, 0.9);
    color: #fff;
    padding: 0.5em 0.5em 0.5em 0.5em;
    border-bottom: 4px solid rgba(119, 119, 119, 0.5);
    border-radius: 5px 5px 0 0;
    z-index: 99999;
}

#pager {
    width: 100%;
}

#toolbar button, #page-mode input {
    font: inherit;
}

#page-mode {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    padding: 0.25em 0.5em;
}

#viewport-container {
    -webkit-box-flex: 1;
    -ms-flex: 1;
    flex: 1;
    background: #b5b5b5;
    overflow: auto;
    padding: 60px 15px 10px 15px;
    border-radius: 5px;
    height: 300px;
    margin-top: -50px;
}

#viewport {
    /* width: 817px; */
    min-width: 817px;
    margin: 0 auto;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    /* padding: 10px; */
    margin-top: -70px;
    padding-top: 70px;
}

#viewport>div {
    text-align: center;
    max-width: 100%;
    border-radius: 5px;
}

#viewport canvas {
    background: #ffffff;
}