.menu-burger__container{
    width: 250px;
    height: 80%;
    padding-top: 40px;
    padding-left: 10px;
    position: fixed;
}

.header__nav {
    overflow: auto; /*для того, чтобы меню скроллилось в случае, если оно не влезает на экран*/
    display: block;
    position: absolute;
/*
    position: fixed;
*/
    top: 80px;
    left: 40px;
    background: rgb(245, 246, 246);
    box-shadow: #ccc;
    width: 100%;
    height: 100%;
    box-shadow: 0 4px 2px -2px rgba(36, 36, 36, 0.37);
	left:-100%;
    transition: all 0.4s ease;
}



.header__menu {
    display: block;
	position: relative;
	z-index: 2;
    padding-left: 20px;
}

.header__menu a:link, .header__menu a:visited, .header__menu a:active {
color:#303030;
text-decoration: none;
}


.header__nav.open-menu{
    left:0;
}
.header__menu li {
	list-style: none;
        background:none;
	margin-top: 0.35em;
	margin-right: 10px;
	color: #303030;
	font-size: 0.9em;
	text-decoration: none;
	line-height: 110%;
}

.header__menu ul li {
	margin-left: -25px;
	font-size: 0.95em;
}

.menu-burger__header {
    position: relative;
    width: 30px;
    height: 35px;
    display: block;
    margin-left: 10px;
   }
.menu-burger__header span, .menu-burger__header:after, .menu-burger__header:before{
	height: 3px;
	width: 100%;
	position: absolute;
	background: #515758;
	margin: 0 auto;
}
.menu-burger__header span{
	top: 16px;
}
.menu-burger__header:after, .menu-burger__header:before{
	content: '';
}
.menu-burger__header:after{
	bottom: 7px;
}
.menu-burger__header:before{
	top: 7px;
}

.menu-burger__header p{
	margin-left: -2px;
	margin-top: -10px;
	font-style: italic;
	font-size: 1.1em;
	color: #303030;
}

.menu-burger__header.open-menu span {
	opacity:0; 
    transition: 0.5s; 
}
.menu-burger__header.open-menu:before {
	transform: rotate(38deg);
    top: 16px;
    transition: 0.4s;
}
.menu-burger__header.open-menu:after {
	transform: rotate(-38deg);
    bottom: 16px;
    transition: 0.4s;
}

.fixed-page{
    overflow: hidden; /*запрещаем прокручивание страницы при открытом меню*/
}