.inhead {
    width: 100%;
    display: flex;
    flex-direction: column;
    position: relative;

    margin-top: 0;
    margin-bottom: 0;
    padding: 0;
    border: 0px solid black;
}

.index_firsthead    {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: absolute;
    border: 0px solid black;
    margin-top: 100px;
    margin: 0px;
}

.firstcon   {
    margin-top: 10px;
    border: 0px solid black;
}

#index_desktop_backgroundvideo    {
    z-index: 0;
    width: 100%;
    display: flex;

    margin-top: 0px;
    margin-bottom: -0;
    position: fixed;
    opacity: 0.4;
}

.background {
    align-items: center;
    text-align: center;
    justify-content: center;
    border: 0px solid black;
    padding: 0;
    margin: 0;
}

.headblock  {
    display: flex;
    position: relative;
    margin-left: 100px;
    margin-right: 100px;
    margin-top: 50px;
    border: 0px solid black;
}

.headblock h1   {
    color: white;
    background: repeating-linear-gradient(-45deg, red 0%, yellow 7.14%, rgb(0,255,0) 14.28%, blue 35.7%, magenta 42.84%, red 50%);
    background-size: 600vw 600vw;
    -webkit-text-fill-color: transparent;
    -webkit-background-clip: text;
    animation: slide 10s linear infinite forwards;
}

@keyframes slide   {
    0%{
        background-position: 0%;
    }
    100%{
        background-position: 600vw;
    }
}

.index_headline {
    width: auto;
    text-align: start;
    align-items: start;
    margin-top: 150px;
    margin-bottom: 200px;
    margin-left: 0;
    margin-right: 0px;
    border: 0px solid black;
    font-size: 70px;
    text-transform: uppercase;
}

.mainnav    {
    z-index: 2;
}

.nutzen {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background-color: #00CD66;
    border: 0px solid black;
    border-radius: 0px;
    padding-top: 50px;
    padding-bottom: 30px;
    margin-top: 0px;
    margin-left: 0px;
    margin-right: 0px;
    margin-bottom: 0px;
}

.nutzenline {
    width: 80%;
}

@media(max-width: 1300px){

    .headblock  {
        margin-left: 30px;
        margin-right: 30px;
    }

    #index_desktop_backgroundvideo    {
        width: 150%;
    }

}

@media(max-width: 1030px){

    #index_desktop_backgroundvideo    {
        width: 180%;
        margin-right: 170%;
    }

    .divheadline    {
        border: 0px solid black;
        margin-top: 10px;
        margin-bottom: 100px;
    }

}

@media(max-width: 850px){

    #index_desktop_backgroundvideo    {
        width: 270%;
        margin-right: 70%;
        margin-top: -50%;
    }

    .background   {
        margin-top: 2px;
    }

    .headblock  {
        display: block;
        margin-left: 5px;
        margin-right: 5px;
    }

    .startbild  {
        margin-top: 0;
    }

    .index_headline {
        margin-top: 0;
        margin-bottom: 50px;
    }
}

@media(max-width: 670px){

    #index_desktop_backgroundvideo    {
        width: 330%;
        justify-content: left;
        margin-left: -200px;
        margin-top: 0;
    }

    .inhead {
        background: rgb(193,255,193,0.0);
    }

    #index_tab_backgroundvideo  {  
        margin-top: 0px;
    }

    .background   {
        margin-top: 300px;
    }

    .index_headline   {
        font-size: 40pt;
    }

    .firstcon   {
        margin-top: 0px;
    }
}