.app {
    max-width: 900px;
    margin: 0 auto;
    font-family: sans-serif;
}

.content-page {
    background-color: rgb(246,250,246);
    height: 0;
    overflow: hidden;
    width: 100%;
    opacity: 0;
}

.content-page.displayed {
    opacity: 1;
    height: auto;
    line-height: 1em;
    -webkit-transition: opacity 1.5s linear;    
    transition: opacity 1.5s linear;
}

.intro {
    margin-bottom: 32px;
}
.content {
    margin: 0 24px;
}

h1, h2 {
    color: rgb(246,250,246);
    padding: 8px 24px;
    margin: 0;
}

h1 {
    background: linear-gradient(to left, rgb(100,160,255), rgb(50,100,178));
    font-size: 16pt;
}

h2 {
    background: linear-gradient(to left, rgb(100,178,178), rgb(50,128,128));
    font-size: 13pt;
    font-weight: 600;
}

p {
    margin: 6pt 0;
}

.copyright {
    font-size: 9pt;
    text-align: right;
    color: rgb(60,60,60);
}

.canvas-wrapper {
    width: 100%;
    margin: 12px 0;
}

.task-button {
    padding: 4px 12px;
    margin-bottom: 12px;
}

span.content-page-number {
    font-weight: bold; 
}

.resource {
    display: none;
}

.validation-message {
    display: none;
    color : red;
    font-weight: bold;
}

.validation-message, .feedback {
    margin-top: 18px;
}

#evaluation {
    color: rgb(50,168,128);
    font-weight: bold;
}

#count-view-canvas-wrapper {
    position: relative;
}

#back-to-map {
    border: none;
    border-radius : 2px;
    padding: 6px;
    position: absolute;
    display: none;
    top: 10px;
    right: 10px;
    background: linear-gradient(rgb(242,242,255), rgb(200,200,244));
}

#back-to-map:hover {
    cursor: pointer;
    background: linear-gradient(rgb(242,255,255), rgb(200,244,244));
}

#back-to-map:active {
    background: linear-gradient(rgb(222,245,245), rgb(160,234,234));
    transform: translate(1px, 1px)
}

#restart, #feedback {
    display: none;
}