body{
    margin: 0;
    padding: 0;
    background-color: black;
    }
    
    .header{
        background-color: #db0000;
        position: fixed;
        left: 0px;
        top: 0px;
        right: 0px;
        height: 90px;
    }
    
    .content{
        background-color: white;
        margin-top: 90px;
        margin-bottom: 100px;
    }
    
    .footer{
        background-color: black;
        padding: 20px;
        position: fixed;
        left: 0px;
        right: 0px;
        bottom: 0px;
        
    }
    
    .header_container{
        background-color: transparent;
        width: 100%;
    
    }
    
    .header_logo1{
        width: 50%;
    }
    
    .header_logo2{
        width: 50%;
        text-align: right;
    }
    
    .footer_image{
       text-align: center;
    }
    
    .footer_copyright{
        text-align: center;
        width: 100%;
        color: white;
        margin-top: 2%;
    }

    .header_logozone{
        background-color: #db0000;
        width: 100%;
        display: block;
        float: left;
        display: flex;
        justify-content: top;
        align-items: flex-start;
    }

    .header_nav{
        background-color: aquamarine;
        width: 100%;
        display: block;
        float: left;
        overflow: auto;
        
    }

    nav{
        display: flex;
    
    }

    nav a{
        text-decoration: none;
        padding: 10px;
        background-color: cyan;
        color: darkblue;
        font-weight: 800;
        flex: 1;
        text-align: center;
    
    }

    nav a:hover{
        background-color: aquamarine;
    }

    nav a.active{
        color: white;
        background-color: #db0000;
    }

    nav a.active:hover{
        background-color: indianred;
    }

    .contents_left{
        width: 20%;
        background-color: bisque;
        float: left;
        min-height: 300px;
    

    }

.contents:left nav{
    flex-direction: column;
}

    .contents_right{
        background-color: aquamarine;
        width: 80%;
        float: left;
        min-height: 300px;
    }