body {
    background-image:
        radial-gradient(circle 8vw at 50% 65%, rgb(255, 143, 87) 0%, transparent 100%),
        radial-gradient(circle 16vw at top right, #343434 0%, transparent 100%),
        radial-gradient(circle 50px at 75% 30%, rgba(255, 95, 15, 0.868) 0%, transparent 100%),
        radial-gradient(circle 6vw at 60% 30%, rgb(55, 55, 55) 0%, transparent 100%),
        radial-gradient(circle 10vw at 85% 60%,  rgba(90, 90, 90, 0.868) 0%, transparent 100%);
    background-repeat: no-repeat;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}
#main-content {
    width: 100%;
}
#idDevelop_start_section img {              /*alle img dieser Seite*/
    width: 100%;
    opacity: 0.8;
    border-radius: 10px;
    box-shadow: 1px 1px 15px var(--primary-bg-color);
}
.develop_main_2:first-child {               /*erstes Kindelement Inhalt von Hauptcontainer 2*/
    margin-top: 0;
}
.develop_main_1_img, .develop_main_2_img {  /*Bildbereiche von Hauptcontainer 1 und 2*/
    width: 35%;
}
.develop_main_2_img {                       /*Bildbereich von Hauptcontainer 2*/
    margin-top: 5%;
}
.develop_main_2_img img {                   /*img in Bildbereich von Hauptcontainer 2*/
    position: sticky;
    top: 100px;
    width: 100%;
    opacity: 0.6;
    border-radius: 5px;
    box-shadow:
    5px 5px 25px var(--secondary-bg-color),
    -5px 0 10px var(--primary-bg-color),
    5px 0 10px var(--primary-bg-color);
}
.develop_main_content_text {
    width: 100%;
}
#idDevelop_referenz_section {
    width: 80%;
    margin: 3% auto 0;
    display: flex;
    flex-direction: column;
}
.referenz_cards {
    width: 100%;
    margin: 3% auto 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-evenly;
}
.referenz_card {
    scale: 0.98 0.98;
    width: 25%;
    min-height: 200px;
    padding: 25px;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    /* gap: 12px; */
    color: var(--primary-text-color);
    background-image: linear-gradient(to top, var(--secondary-bg-color) 30%, var(--primary-text-color) 70%);
    border-left: 10px solid rgba(245 245 245 / 0.8);
    border-radius: 20px;
    transition: scale 250ms ease;
}
.referenz_card:hover {
    scale: 1 1;
}
.referenz_card p {
    font-size: clamp(1rem, 0.5vw + 0.5rem, 1.2rem);
}
.referenzImg {
    width: 100%;
    height: clamp(120px, 22vw, 180px);
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}
.referenzImg img {
    max-height: 100%;
    max-width: 100%;
    object-fit: contain;
    object-position: center;
}

@media (max-width:1920px) {
    .referenz_card {
        flex: 1 1 305px;
        min-width: 305px;
        max-width: 30%;
    }
}

@media (max-width:1200px) {
    .referenz_cards {
        justify-content: space-between;
    }
    .referenz_card {
        min-width: 40%;
        max-width: 48%;
        margin-top: 3%;
        padding: 15px;
        overflow: auto;
    }
}

@media (max-width:1080px) {
    .referenz_cards {
        margin: 0 auto;
        flex-wrap: wrap;
        justify-content: center;
    }
    .referenz_card {
        scale: 1 1;
        min-width: 60%;
        max-width: 80%;
        margin-top: 3%;
        padding: 15px;
        overflow: auto;
    }
}

@media (max-width:800px) {
    body {
        background-image:
        radial-gradient(circle 8vw at 50% 65%, rgb(255, 143, 87) 0%, transparent 100%),
        radial-gradient(circle 16vw at top right, #343434 0%, transparent 100%),
        radial-gradient(circle 50px at 75% 30%, rgba(255, 95, 15, 0.868) 0%, transparent 100%),
        radial-gradient(circle 6vw at 60% 30%, rgb(55, 55, 55) 0%, transparent 100%),
        radial-gradient(circle 10vw at 85% 60%,  rgba(90, 90, 90, 0.868) 0%, transparent 100%);
    background-repeat: no-repeat;
    }
    .develop_main_1_img, .develop_main_2_img {
        width: 100%;
    }
    .develop_main_2_img {
        position: sticky;
        top: 10vh;
        z-index: -1;
        opacity: 0.3;
    }
    .develop_main_content_text {
        width: 3% 0;
    }
    #idDevelop_referenz_section {
        margin: 3% auto 5% auto;
    }
    #idDevelop_referenz_section p {
        margin: 0 5%;
        overflow-wrap: anywhere;
    }
    .referenz_card {
        width: 80%;
    }
    .referenzImg {
        height: clamp(100px, 30vw, 160px);
        margin-bottom: 12px;
    }
}

@media (max-width:600px) {
    .referenz_card {
        position: sticky;
        top: 60px;
        min-width: 100%;
        height: 50vh;
        margin: 10px;
    }
}

@media (max-width:480px) {
    body {
        -webkit-backdrop-filter: none;
        -moz-backdrop-filter: none;
        -o-backdrop-filter: none;
        backdrop-filter: none;
    }
    #idDevelop_referenz_section {
        margin: 3% auto 0%;
    }
    .referenz_card {
        height: 45vh;
    }
    .referenzImg {
        height: clamp(100px, 35vw, 160px);
        margin-bottom: 12px;
    }
    .referenzImg img {
        max-height: 100%;
        max-width: 100%;
    }
}