*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: arial;
}

header{
    width: 100%;
    height: 60px;
    background: #1e1e1e;
    position: fixed;
    z-index: 100;
}

.img-logo{
    height: 60px;
    width: 150px;
   
    margin-left: 10%;
    padding: 6px;
}

.menu{
    width: auto;
    float:right;
    margin-top: 19px;
    margin-right: 10%;
    
}

.menu ul{
    display: flex;
}
.menu li{
    list-style: none;
}

.menu li a{
    padding: 10px;
    text-decoration: none;
    font-size: 18px;
    font-weight: bold;
    color: #b7b7b7;
  
}

.menu li a:hover{
    color: white;
}

#check{
    display: none;
}
.icon-menu{
    display: none;
}

#check:checked ~ .menu{
    height: 174px;
}

@media screen and (max-width:900px){
    .icon-menu{
        display: block;
        color: white;
        float: right;
        padding: 5px;
        font-size: 24px;
        border: 1px solid #7a7a7a;
        border-radius: 5px;
        margin-top: 10px;
        margin-right: 16px;
    }
    .icon-menu:hover{
        background: #3f3f3f;
        cursor: pointer;
    }
    .menu{
        float: left;
        margin-top: 0px;
        width: 100%;
        height: 0px;
        overflow: hidden;
        background: #1e1e1e;
        transition: all 300ms;
    }
    
    .menu ul{
        flex-direction: column;
    }
    .menu li a{
        display: block
    }
}