html {
    background-color: #212121;
    font-family: sans-serif;
    color: white;
    padding: 24px;
}

.headerContainer {
    display: flex;
    flex-direction: row-reverse;
    align-items: center;
    justify-content: center;
}

.headerContainerVertical {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

body {
    margin: 0px;
}

h1 {
    text-align: left;
    font-size: 1.5em;
}

h2 {
    margin-top: 48px;
}

.manualSectionTitle  {
    box-sizing: border-box;
    width: 100%;
    margin: 32px 0 0 0;
    text-align: center;
    padding: 8px 0;
    color:#FFFFFF;
}

h3 {
    margin-top: 48px;
}

.aboutCompanyLogo {
    display: block;
    width: 120px;
    height: 120px;
    margin-right: 16px;
}

.pageLogo {
    display: block;
    width: 240px;
    height: 240px;
}

p {
    color: #FFFFFFCB;
    text-align: left;
    letter-spacing: 1px;
    line-height: 1.5em;
}

.green { color: #4CAF50; }

.hintText {
    letter-spacing: 1px;
    line-height: 1.2em;
    border-color: #EEEEEE;
    border-radius: 10px;
    padding: 16px;
    border-style: solid;
}

footer {
    display: flex;
    gap: 8px;
    justify-content: center;
}

.contactsLogo {
    max-width: 100%;
    max-height: 24px;
}

a:link { color: #FF8A65; }
a:visited { color: #FF8A65; }

.appCard {
    width: 100%;
    background: #272727;
    border-radius: 10px;
    box-shadow: 3px 3px 6px #00000099;
    padding: 16px;
    margin-top: 24px;
}

.lessonCard {
    width: 100%;
    background: #272727;
    border-radius: 10px;
    box-shadow: none;
    box-shadow: 2px 2px 4px #00000099;
    padding: 16px;
    margin-top: 12px;
}

.manualCard {
    background: #272727;
    border-radius: 10px;
    box-shadow: 3px 3px 6px #00000099;
    padding: 16px;
    margin-top: 24px;
}

.appCardButtonsContainer {
    display: flex;
    justify-content: right;
    gap: 8px;
}

.appCardHeader {
    display: flex;
    align-items: center;
}

.appTitle {
    margin: 0px 16px;
    font-size: 1.2em;
}

.manualTitle {
    margin: 0px 0px;
    font-size: 1.2em;
}

.appIcon {
    width: 48px;
    height: 48px;
    border-radius: 10px;
}

.techIcon {
    width: 48px;
    height: 48px;
}

.appCardDescription {
    text-align: left;
    font-size: 0.8em;
}

.lessonTitle {
    text-align: left;
    font-size: 1em;
    margin: 0px;
}

.appCardButton {
    display: block;
    height: 32px;
}

li {
    color: #FFFFFFCB;
    letter-spacing: 1px;
    line-height: 1.5em;
    margin-top: 16px;
}

.articleButtonsContainer {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 64px;
}

.articleImagesContainer {
    display: flex;
    width: 100%;
    gap: 8px;
    margin-top: 48px;
    justify-content: center;
}

.articleImage {
    display: block;
    width: 100%;
}

.articleDoubleImage {
    max-width: 45%
}

.anchorButton {
    background: #FF8A65;
    border-radius: 6px;
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    text-decoration: none;
    padding: 6px 10px;
    color: #FFFFFF;
    font-size: 0.8em;
    height: 20px;
}

.lessonItem {
    width: 100%;
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    text-decoration: none;
}

.anchorButton:link { color: #FFFFFF; }
.anchorButton:visited { color: #FFFFFF; }

.anchorImageButton {
    border-radius: 6px;
    border: thin solid white;
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    text-decoration: none;
    padding: 6px 10px;
    color: #FFFFFF;
    font-size: 0.8em;
    height: 20px;
}

.anchorImageButton:link { color: #FFFFFF; }
.anchorImageButton:visited { color: #FFFFFF; }

.imageButtonIcon {
    height: 100%;
    margin-right: 8px;
}

.manualCardTitleContainer {
    display: flex;
    flex-direction: row;
    align-items: center;
}

.manualCardTitleImage {
    width: 48px;
    height: 48px;
    margin-right: 16px;
}

.showMobile {
    display: block;
}

.hideMobile {
    display: none;
}

.videoContainer {
    position: relative;
    width: 100%;
    height: 0;
    padding-bottom: 56.25%;
}
.video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: unset;
    title="YouTube video player";
    allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share";
    referrerpolicy="strict-origin-when-cross-origin";
}

@media screen and (min-width: 800px) {
    html {
        width: 640px;
        margin: auto;
    }
    .aboutCompanyLogo {
        width: 150px;
        height: 150px;
    }
    h1 {
        text-align: center;
        font-size: 2em;
    }
    .appCard {
        width: 500px;
        padding: 24px;
    }
    .manualCard {
        width: 500px;
        padding: 24px;
    }
    .appTitle {
        margin: 0px 16px;
        font-size: 1.5em;
    }
    .manualTitle {
        margin: 0px 0px;
        font-size: 1.2em;
    }
    .appIcon {
        width: 64px;
        height: 64px;
    }
    .techIcon {
        width: 64px;
        height: 64px;
    }
    .appCardDescription {
        font-size: 0.9em;
    }
    .lessonTitle {
        font-size: 1.1em;
    }
    .manualSectionTitle  {
        padding-left: 0px;
        width: 548px;
    }
    .manualCardTitleImage {
        width: 56px;
        height: 56px;
    }
    .showMobile {
        display: none;
    }
    .hideMobile {
        display: block;
    }
}