* {
    box-sizing: border-box;
}

#contents {
    max-width: 800px;
    margin: 0 auto;
    font-family: "Segoe UI", Verdana, sans-serif;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

#startview {
    display: flex;
    flex-direction: column;
    gap: 14px;
    width: 100%;
    
}

#introwrapper {
    width: 100%;
    background-image: url("../img/cumulonimbus_fragment.jpg");
    background-size: cover;
    background-repeat: no-repeat;
    background-color: rgba(255,255,255,0.7);
    background-blend-mode: lighten;
    padding: 6px 16px;
}

#intro {
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
}

#intro h1 {
    font-size: 28px;
    font-weight: 700;
    color: #1344a0;
    text-shadow: 1px 1px 3px darkgray;
    width: 100%;
    text-align: center;
    margin: 6px 0 12px 0;
}

#intro p {
    font-size: 18px;
    margin: 12px 0;
}

.node {
    width: 100%;
    display: none;
}

.image, .info, .image img {
    width: 100%;
}

.image img {
    display: block;
}

.col1 {
    position: relative;
}

.credit {
    background: #606060;
    width: 100%;
    color: lightgray;
    padding: 1px 2px;
    font-size: 14px;
    position: absolute;
    bottom: 0;
    left: 0;
}

.credit a {
    color: inherit;
    text-decoration: none;
}

.node.active {
    display: flex;    
    gap: 10px;
}

.col1, .col2 {
    flex: 1 1 auto;
    width: 100%;
}

@media screen and (max-width: 699px) {
    .node.active { flex-direction: column; gap: 16px;}
    
}

@media screen and (min-width: 700px) {
    .node.active  {flex-direction: row; }
}

.buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
}

.buttons button {
    cursor: pointer;
    padding: 6px 16px;
    font-family: inherit;
    font-size: 18px;
    min-width: 60px;
    text-align: center;
    border: solid 1px #b3b3cc;
    border-radius: 6px;
    background-color: #f0f0f0;
    box-shadow: 0 3px 3px #d1d1e0;
}

.buttons button:hover {  
    border-color: #5c5c8a;
}

.buttons button:active {
    border-color: #5c5c8a;
    box-shadow: none;
}

.navigation {
    display: flex;
    justify-content: space-between;
    padding: 6px;
    background: #fad7b7;
}

.navigation img {
    width: 28px;
    filter: invert(39%) sepia(18%) saturate(944%) hue-rotate(202deg) brightness(89%) contrast(89%);
}

.navitem {
    font-family: inherit;
    font-size: 18px;
    cursor: pointer;
    display: flex;
    gap: 4px;
    color: #5c5c8a;
}

.navitem:hover {
    color: 	#0080ff;
}
.navitem:hover img {
    filter: invert(33%) sepia(39%) saturate(3780%) hue-rotate(197deg) brightness(102%) contrast(107%);
}

.col2 {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 16px;
}

.info {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.question, .description {
    font-size: 18px;
}

.cloudType {
    font-size: 20px;
    font-weight: 600;
}

.latin {
    font-size: 18px;
}

span .nobreak {
    white-space: nowrap;
}