.main-container {
        padding-top: 20vh;
        margin: 8%;
        display: grid;
        gap: 10%;
    }

    .box {
        background: rgb(255, 255, 255);
        border: 3px solid black;
        border-radius: 15px;
        padding: 1%;
        text-decoration: none;
        background-size: cover;
    }

    .box1 {
        background-image: url(ilet.webp);
        background-clip: border-box;
        background-position: 50%;
        text-align: center;
        font-size: 20px;
        font-weight: bold;
        max-height: fit-content;
        display: flex;
        justify-content: flex-start;
    }

    .box2 {
        color: black;
        padding-top: 3vw;
        padding-left: 2vw;
        padding-right: 7vw;
    }

    .hidrojen {
        color: red;
        font-size: 1.8vw;
    }

    .childo2 {
        align-self: center;
        text-align: right;
    }

    .childo23 {
        text-align: left;
    }

    /* Mobil görünümü */
    @media (max-width: 767px) {
        .main-container {
            grid-template-columns: 1fr;
            grid-template-rows: 30vh;
            grid-template-areas:
                "box1"
                "box2"
                "box3";
        }

        .box1 {
            padding: 1% 1%;
            background-size: cover;
        }

        .box1 {
            background-image: url(ilet.webp);
            background-clip: border-box;
            background-position: 50%;
            text-align: center;
            font-size: 20px;
            font-weight: bold;
            max-height: fit-content;
            display: flex;
            justify-content: flex-start;
        }

        .box2 {
            color: black;
            padding-top: 3vw;
            padding-left: 2vw;
            padding-right: 7vw;
        }

        .hidrojen {
            color: red;
            font-size: 5vw;
        }

        .childo2 {
            align-self: center;
            text-align: right;
            font-size: 4vw;
        }

        .childo23 {
            text-align: left;
            font-size: 4vw;
        }
    }

    /*Tablet gör.*/
    @media (min-width:767px) and (max-width:1400px) {
        .main-container {
            grid-template-columns: 1.5fr 1fr;
            /* sol ve sağ sütun */
            grid-template-rows: 30vw 20vw;
            /* sol kutular için iki satır */
            grid-template-areas:
                "box1 box2"
                "box3 box3";
        }

        .box1 {
            grid-area: box1;
        }

        .box2 {
            grid-area: box2;
        }

        .box3 {
            grid-area: box3;
        }

    }

    /* PC görünümü */
    @media (min-width: 1400px) {
        .main-container {
            grid-template-columns: 1.5fr 1fr;
            /* sol ve sağ sütun */
            grid-template-rows: 30vw 20vw;
            /* sol kutular için iki satır */
            grid-template-areas:
                "box1 box2"
                "box3 box3";
        }

        .box1 {
            grid-area: box1;
        }

        .box2 {
            grid-area: box2;
        }

        .box3 {
            grid-area: box3;
        }

        #cumhres {
            padding-top: 4%;
        }
    }