/*** articles ***/

article.box {
    position: relative;
    margin: 2% auto;
    border-style: solid none none;
    border-width: 1px;
    padding: 2%;
    min-height: 9em;
    max-height: 20em;
    overflow: hidden;
    transition: max-height 0.5s;
}

article video {
    max-width: 100%;
    height: auto;
}

.main_article article.box:not(.clicked) {
    border-bottom-right-radius: 0;
    border-bottom-left-radius: 0;
}

/** header **/

header a {
    color: inherit;
    text-decoration: inherit;
}

header .metadata {
    text-align: right;
}

article .author {
    font-weight: bold;
}

article .author::after {
    content: ", ";
}

/*** labels ***/

.labels {
    text-align: right;
    white-space: nowrap;
}

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

.labels span {
    font-variant: small-caps;
    font-size: 0.8rem;
    background-color: #ddd;
    border-radius: 0.4em;
    padding: 0 0.5em;
    transition: all 0.5s;
}

.labels a>span {
    cursor: pointer;
}

.labels a>span:hover {
    box-shadow: 0px 0px 6px 1px #000;
}


/** content **/

article div.content {
    text-align: justify;
    font-size: 0.9em;
}

article div.content.text {
    white-space: pre-wrap;
}


article img {
    max-width: 100%;
    margin: 0;
}

/** reduce/expand buttons **/

.expand_box {
    cursor: pointer;
}

.box_top {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
}

.box_bottom {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
}

.expand_box.box_bottom::before {
    /* we do a gradient to show that text can be expanded */
    background-image: linear-gradient(to bottom,rgba(0,0,0,0),#ffffff);
    display: block;
    content: "";
    width: 100%;
    height: 4em;
    border: none;
}

.expand_box p {
    background-color: white;
    margin: 0;
    text-align: center;
    font-weight: bold;
    font-size: 0.8em;
    border-style: solid none dotted none;
    border-width: 1px 0 1px;
    border-bottom-color: gray;
}

article .expand_box .hide {
    /* when not clicked, we only display .show */
    display: none;
}

article .expand_box.box_top {
    /* top expand box only show a reduce button
     * so it should be displayed only when article is .clicked */
    display: none;
}

/** other language **/

/* we hide everything just to display a message informing that
 * the item is in an other language, and asking to click
 * to display it */

article.other_lang>div.info {
    display: none;
}

article.other_lang.init>* {
    display: none;
}

article.other_lang.init>div.info {
    display: initial;
}

article.other_lang.init>div.expand_box.box_top {
    /* as we need to have the message clickable, we cheat and use
     * expand box on the whole surface but fully transparent */
    display: initial;
    height: 100%;
    opacity: 0;
}

article.other_lang.init>div.info>p {
    margin: 0;
    padding: 0.2em;
    text-align: center;
    font-style: italic;
}

article.other_lang.init {
    border: none;
    border-radius: 0;
    padding: 0;
    min-height: 0;
}

/*** comments ***/

button.comments_btn {
    border: none;
    font-weight: bold;
    display: block;
    margin: 0 10% 0 auto;
    border-radius: 1em;
    background:  #b8bcc4;
    color: #4d4d4d;
}

button.comments_btn:active {
    background: #4d4d4d;
    color: #b8bcc4;
}

button.comments_btn.clicked span.show {
    display: none;
}

button.comments_btn:not(.clicked) span.hide {
    display: none;
}

.comments_panel {
    max-height: 0;
    opacity: 0;
    transition: max-height 1s, opacity 2s;
    overflow: hidden;
}

.comments_panel.clicked {
    opacity: 1;
}

.comments article {
    background-color: #9ca0a8;
    border: none;
    max-height: none;
}

.comment_post {
    text-align: center;
}

.comment_post textarea {
    border-style: solid;
    border-width: 1px  0;
    border-color: black;
    max-width: 100%;
}

.comments_panel article .expand_box {
    /* no expand box in comments */
    display: none;
}

/*** media queries ***/

@media (min-width: 500px) {
    /*** general ***/

    #main_area {
        background-image: var(--bg-img);
        background-repeat: no-repeat;
        background-size: cover;
    }

    article.box {
        width: 80%;
        border-style: solid solid none solid;
    }
    .comments article.box {
        width: 30rem;
        margin: 2% auto;
        border: none;
    }
    .comment_post textarea {
        border-width: 1px;
        border-radius: 1em;
        border: solid 1px;
        padding: 0.5em;
    }

    footer span {
        background: rgba(200,200,200,0.6);
        border-radius: 0.5em 0.5em 0 0;
        padding: 0 0.5em;
        margin-top: 1em;
    }

}

/*** clicked ***/

.main_article article.clicked {
    border-bottom-style: solid;
}

.main_article article.clicked .expand_box.box_top {
    display: initial;
}

.main_article article.clicked .expand_box {
    opacity: 0;
    transition: opacity 0.5s;
}

.main_article article.clicked .expand_box p {
    background-color: transparent;
    border: none;
}

.main_article article.clicked .expand_box:hover {
    opacity: 1;
    color: grey;
}

.main_article article.clicked .expand_box::before {
    background-image: none;
    display: none;
}

.main_article article.clicked .expand_box .hide {
    display: inline;
}

.main_article article.clicked .expand_box .show {
    display: none;
}