html, body {
    margin: 0;
	position: relative;
	font-size: 16px;
	line-height: 1.4;
	min-width: 420px;
	overflow-x: hidden;
	height: auto;
    background: linear-gradient(to right top, rgb(11, 88, 121), rgb(86, 6, 35));
    background-size: 700% 2300%;
    animation: gradient 10s ease-in-out infinite;
    font-family: 'Times New Roman', Times, serif;
}


@keyframes gradient {
    0% {

        background-position: 0 50%;

    }

    50% {

        background-position: 100% 50%;


    }

    100% {

        background-position: 0 50%;


    }  


}



.back-container{
    height: 10%;
    padding: 2%;
    background: linear-gradient(to right top, goldenrod, rgb(143, 43, 79));
    animation: gradient 10s ease-in-out infinite;
    display: grid;
    grid-template-columns: 10%  80%;
    height: inherit;
}


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

.back1{
    text-align: center;
    display: inline-block;
    width: 100px;
    font-size: 30px;
    color: black;
    background-color:goldenrod;
    display: inline-block;
    padding-top: 11%;
    padding-left: 2%;
    padding-right: 2%; 
    border-radius: 200px;
    font-weight: 300;
    text-decoration: none;

    transition: 0.4s ease-in-out;
}

.back1:hover{
    background-color: rgba(255, 255, 0, 0.548);
    /* padding: 2%; */
    box-shadow: 0 0 20px 10px rgba(255, 255, 0, 0.603);
    font-weight:300;
    text-decoration: none;
}




.otbaner1{
    margin: 0;
    display: inline-block;
    font-size: 45px;
    text-align: center;
    color: black;
    padding: 1%;
    border-radius: 10px;
}





.telo{
    margin: 10%;
    padding: 5%;
    margin-top: 2%;
    /* background: rgb(14, 65, 80, 0.8); */
    background: linear-gradient(to right top, rgb(11, 88, 121), rgb(86, 6, 35));
    animation: gradient 10s ease-in-out infinite;
    align-items: center;
    border-radius: 20px;

}



.course1-header-container{
    text-align: center;
    margin: 2%;
}


.v-nalogi{
    text-decoration: none;
    font-size: 20px;
    font-weight: 600;
    display: inline-block;
    margin: 3%;
    padding: 3%;
    background-color: #fff;
    border-radius: 20px;
    transition: all 0.4s ease-in-out;
}


.v-instr{
    text-decoration: none;
    font-size: 20px;
    font-weight: 600;
    display: inline-block;
    padding: 3%;
    background-color: #fff;
    border-radius: 20px;
    transition: all 0.4s ease-in-out;
}

.v-nalogi:hover, .v-instr:hover{
    /* color: #fff; */
    box-shadow: 0 0 20px 20px  rgba(226, 0, 226, 0.6);/*rgba(17, 121, 71, 0.9);*/
    text-decoration: none;
    font-size: 20px;
    font-weight: 600;
    display: inline-block;
    background-color: white;
    border-radius: 20px;
}






.v-smth{
    margin: 2%;
    padding: 5%;
    margin-top: 2%;
    background: rgba(28, 129, 160, 0.37);
    align-items: center;
    border-radius: 20px;

}






















@media only screen and (min-width: 100px) and (max-width: 1000px) {

    .otbaner1{
        margin: 0;
        display: inline-block;
        font-size: 30px;
        text-align: center;
        color: black;
        padding: 1%;
        padding-top: 2%;
        border-radius: 10px;
    }
    .back1{
        padding-bottom: 18%;
    }
    h1{
        font-size: x-large;
    }

}