header{
    width:100%;
    /*цвет шапки*/
    background-color:#000099;
    padding: 0;
    margin:0;
    height:120px;
}

@keyframes spin {
    100% {
        transform: rotate(360deg);
    }
}


.picture-logo{
    width:170px;
    height:100px;
    float:left;
    margin:10px;
}

nav {
    margin-top: 20px;
    order: 1;
    width: auto;
    display: grid;
    height: auto;
    align-content: center;
    background-color: #CCFFFF;
}

nav a {
    float: left;
    color: #99FFFF;
    text-decoration: none;
    margin-bottom: 10px;
    margin-left: 10px;
    margin-right: 10px;
}

body {
    margin: 0;
    background-color: #66CCFF;
    font-size: 120%;
}

.content {
    display: grid;
    width: 100%;
    justify-content: center;
    color: black;
    background-color: #CCFFFF;
    margin-bottom: 25px;
}



table {
    border: 1px solid blue;
    border-collapse: separate;
    empty-cells: hide;
    margin-bottom: 10px;
}

#table {
    font-size: 25px;
    margin-bottom: 5px;
}

th, td {
    border: 2px solid black;
    text-align: center;
}

tr:nth-child(odd) {
    background-color: #66CCCC;
    color: mediumblue;
}

tr:nth-child(even) {
    background-color: #00CCFF;
    color: gold;
}



footer {
    width: 100%;
    color: darkblue;
    background-color: #0099FF;
    min-height: 75px;
}




form {
    display: grid;
    font-size: 20px;
    text-align: center;
}

form input {
    font-size: 16px;
}

form select {
    font-size: 16px;
}

form button {
    width: 50%;
    height: 50px;
    margin-left: 25%;
    margin-top: 10px;
    margin-bottom: 10px;
    background-color: #99FFFF;
}

form textarea {
    height: 200px;
}

@media screen and (min-width: 800px) {
    .content {
        margin-left: auto;
        margin-right: auto;
        justify-content: center;
        color: indigo;
        background-color: #CCCCFF;
        max-width: 960px;
        margin-bottom: 25px;
    }


    .content ul {
        order: -1;
    }


    header {
        display: block;
    }


    nav {
        display: block;
        float: right;
        width: auto;
        height: 50px;
        margin-top: auto;
        margin-left: auto;
        align-content: center;
        background-color: #3366FF;
    }

}