#aods-cover-grid {
    height: 100%;
    min-height: 560px;

    width: 70.71vh; /* ratio of 1/sqrt(2)=70.71% of the height */
    min-width: 340px;

    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;

    margin-left: auto;
    margin-right: auto;
}

/*
 * Dimensions and borders of primary grid rows
 */
#aods-cover-grid > .top {
    height: 17.5%;

    border-bottom-style: solid;
    border-bottom-width: 12px;
    border-bottom-color: #000;

    z-index: 50;
}

#aods-cover-grid > .mid {
    height: 65%;
}

#aods-cover-grid > .bottom {
    height: 17.5%;

    border-top-style: solid;
    border-top-width: 12px;
    border-top-color: #000;

    z-index: 100;
}

/*
 * Dimensions and borders of primary grid columns
 */
#aods-cover-grid > div > .left {
    width: 22.43%;

    height: 100%;
    float: left;

    border-left: solid;
    border-left-width: 12px;
    border-left-color: #000;

    border-right: solid;
    border-right-width: 12px;
    border-right-color: #000;

    z-index: 50;
}

#aods-cover-grid > div > .right {
    height: 100%;

    border-right: solid;
    border-right-width: 12px;
    border-right-color: #000;

    overflow-x: hidden;
}

/*
 * Dimensions and borders of secondary grid rows
 */
#aods-cover-grid > .mid > .left > .top {
    height: 72.5%;

    border-bottom-style: solid;
    border-bottom-width: 12px;
    border-bottom-color: #000;
}

#aods-cover-grid > .mid > .left > .bottom {
    height: 27.5%;
}

/*
 * Dimensions and borders of secondary grid columns
 */
#aods-cover-grid > .bottom > .right > .left {
    height: 100%;
    width: 26.5%;

    float: left;

    border-right-style: solid;
    border-right-width: 12px;
    border-right-color: #000;
    overflow: hidden;
}

#aods-cover-grid > .bottom > .right > .right {
    height: 100%;
    overflow: hidden;
}

#aods-cover-grid .imprint {
    position: absolute;
    bottom: 0;
    margin-left: 1em;
    margin-bottom: .5em;
}
#aods-cover-grid .copyright {
    position: absolute;
    bottom: 0;
    margin-left: 1em;
    margin-right: 1em;
    margin-bottom: .5em;
}

#aods-cover-grid .lead-title {
    text-transform: uppercase;
    text-align: center;
}

#aods-cover-grid .lead-title h1 {
    margin-top: 32px;
    font-size: 32px;
}

#aods-cover-grid .lead-title h2 {
    margin-top: 32px;
    font-size: 24px;
}

#aods-cover-grid .lead-content {
    margin-top: 32px;
}

#aods-cover-grid .container {
    padding-left: 30px;
    padding-right: 30px;
    width: auto;
}

@media (min-width: 639px) {
    #aods-cover-grid .col-sm-6 {
        width: 50%;
    }
}

@media (max-width: 639px) {
    #aods-cover-grid {
        height: 108.75%;
    }

    #aods-cover-grid > .top {
        height: 8.75%;
    }
    #aods-cover-grid > .mid {
        height: 73.75%;
    }

    #aods-cover-grid .imprint {
        position: relative;
    }
    #aods-cover-grid .copyright {
        position: relative;
    }
}

@media (max-width: 479px) {
    #aods-cover-grid > div > .left {
        width: 0px;
        min-width: 0px;
        border-left-width: 0px;
    }
}

@media (max-height: 768px) {
    #aods-cover-grid .lead-title h1 {
        font-size: 24px;
    }

    #aods-cover-grid .lead-title h2 {
        margin-top: 24px;
        font-size: 18px;
    }

    #aods-cover-grid .lead-content {
        margin-top: 24px;
    }
}

@media (max-height: 639px) and (min-width: 640px) {
    #aods-cover-grid {
        height: 108.75%;
    }

    #aods-cover-grid > .top {
        height: 8.75%;
    }
    #aods-cover-grid > .mid {
        height: 73.75%;
    }

    #aods-cover-grid .imprint {
        position: relative;
    }
    #aods-cover-grid .copyright {
        position: relative;
    }
}

@media (max-height: 639px) and (max-width: 639px) {
    #aods-cover-grid {
        height: 117.5%;
    }
    #aods-cover-grid > .top {
        height: 8.75%;
    }
    #aods-cover-grid > .mid {
        height: 82.5%;
    }
}