:root {
    color-scheme: light dark;
    --background-color: rgba(250,250,250,1);
    --text-color-primary: rgb(0, 0, 0);
    --text-color-secondary: rgba(107,127,147);
    --content-padding: 15%;
    --text-weight-bold: 600;
    --text-weight-regular: 400;
    --background-color-1:  rgba(245,244,245);
    --background-color-2: rgba(255,255,255);
    --link-color: var(--text-color-secondary);
}

@media (prefers-color-scheme: dark) {    
    :root {
        --background-color: rgb(40, 45, 50);
        --text-color-primary: rgb(235, 231, 227);
        --text-color-secondary: rgb(180, 185, 190);
        --background-color-1:  rgba(55,60,65);
        --background-color-2: rgba(50,55,60);
        --link-color: var(--text-color-secondary);
    }
}

@media only screen and (min-width:1000px) and (max-width:1400px) {
    :root {
        --content-padding: 10%;
    }
}

@media only screen and (min-width:50px) and (max-width:1000px) {
    :root {
        --content-padding: 5%;
    }
}

html,body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    font-size: 1.1em;
    line-height: 1.45em;
    color: var(--text-color-primary);
    background-color: var(--background-color);
    margin: 0;
    padding: 0;
    -ms-text-size-adjust: 100%;
    -webkit-text-size-adjust: 100%;
}

h1, h2, h3, p {
    margin: 0;
}

h1 {
    font-size: 1.5rem;
    font-weight: var(--text-weight-bold);
}

h2 {
    font-size: 2.25rem;
    font-weight: var(--text-weight-bold);
    margin: 20px 0px 15px 0px;
}

h3 {
    font-size: 2rem;
    font-weight: var(--text-weight-regular);
    line-height: 2.2rem;
    color: var(--text-color-secondary);
}

p {
    margin: 10px 0px 20px 0px;
}

.bg1 {
    background-color: var(--background-color-1);
}

.bg2 {
    background-color: var(--background-color-2);
}

#container {
    width: 100%;
    display: grid;
    grid-template-columns: 1fr;
    row-gap: 0px;
}

#container > div {
    padding-top: 30px;
    padding-bottom: 30px;
}

.columns {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    justify-items: center;
    column-gap: 20px;
}

.columns1 {
    display: grid;
    grid-template-columns: 0.6fr 1fr;
    align-items: center;
    justify-items: center;
    column-gap: 40px;
}

.columns2 {
    display: grid;
    grid-template-columns: 1fr 0.6fr;
    align-items: center;
    justify-items: center;
    column-gap: 40px;
}

.columns > div {
    padding: 30px 0px 30px 0px;
}

.center {
    text-align: center;
}

.text-center {
    text-align: center;
}

.main-screenshot {
    width: 100%;
}

.main-screenshot-iphone {
    width: 50%;
}

.main-icon {
    margin-top: 0px;
    width: 25%;
    height: auto;
}

.main-icon-m {
    margin-top: 0px;
    width: 25%;
    height: auto;
}

.pad {
    padding: 0px var(--content-padding) 0px var(--content-padding);
    margin: 0px 0px 0px 0px;
}

.screenshot {
    width: 100%;
    height: auto;
}

.screenshot-m {
    width: 75%;
    height: auto;
}

.img-outline {
    box-shadow: 0px 5px 8px 5px rgba(127,127,127,0.1),0px 10px 20px 0px rgba(0,0,0,0.7);
    border-radius: 4px;
}

.img-outline-l {
    box-shadow: 0px 5px 8px 5px rgba(127,127,127,0.1),0px 10px 20px 0px rgba(0,0,0,0.5);
    border-radius: 4px;
}

.border { 
    border: 1px solid #ccc;
}

.width-50 {
    width: 50%;
    text-align: center;
    margin: auto auto;
}

.width-60 {
    width: 60%;
    text-align: center;
    margin: auto auto;
}

.width-70 {
    width: 70%;
    text-align: center;
    margin: auto auto;
}

#scroll-menu a {
    display: inline-block;
    color: var(--link-color);
    text-align: center;
    padding: 5px 10px 5px 10px;
    text-decoration: none;
}

#scroll-menu div {
    display: inline-block;
    text-align: center;
    margin: 5px 10px 5px 10px;
}

#scroll-menu a:hover {
    background-color: var(--text-color-primary);
    color: var(--background-color);
    border-radius: 45px;
}

#app-menu-sub ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
}

#app-menu-sub li {
    float: left;
    width: 33.333333%;
}

#app-menu-sub li a {
    font-size: 1.1rem;
    color: var(--link-color);
    text-decoration: none;
}

#app-menu-sub li:hover a {
    text-decoration: underline;
}

@media only screen and (min-width:50px) and (max-width:800px) {
    .columns, .columns1, .columns2 {
        grid-template-columns: 1fr;
        column-gap: 0px;
        row-gap: 20px;
    }
    .columns > div {
        padding: 0px 0px 0px 0px;
    }    

    p {
        margin: 10px 0px 20px 0px;
    }    
    #container > div {
        padding-top: 30px;
        padding-bottom: 20px;
    }
    .text-center {
        text-align: left;
    }
    #scroll-menu {
        display: none;
    }
 
    #app-menu-sub li {
        width: 100%;
        padding: 5px 0px 5px 0px;
        margin: 5px 0px 5px 0px;
    }

    #app-menu-sub li a {
        display: block;    
    }
    
    .main-icon {
        margin-top: 20px;
    }
    
    .main-icon-m {
        margin-top: 20px;
    }    

    h3 {
        margin-bottom: 20px;
    }

    .screenshot {
        width: 100%;
    }

    .main-screenshot-iphone {
        width: 75%;
    }    
}