.nav {
    width: 20vw;
    height: 100%;
    position: fixed;
    top: 0;
    bottom: 0;
    margin: 0;
    left: -20vw;
    padding: 4em 1em;
    -webkit-transition: left 0.3s;
    -moz-transition: left 0.3s;
    transition: left 0.3s;
    background: #ff9c79;
    z-index: 2000;
      direction: rtl;        /* перемещает скроллбар влево */
    
}

.nav-toggle {
    position: absolute; 
    left: 20vw;
    top: 0em;
    padding: 0.5em;
    color: #000000;
    cursor: pointer;
    font-size: 2.5rem;
    line-height: 1;
    z-index: 2001;
    -webkit-transition: color .25s ease-in-out;
    -moz-transition: color .25s ease-in-out;
    transition: color .25s ease-in-out;
}



@media screen and (max-width: 1023px) {
   .nav-toggle {
    left: 80vw;
}
 .nav {
    width: 80vw;
    left: -80vw;   
}    
}


.nav-toggle:after {
   content: "☰";
   font-size: 4rem;
   color: black;
   text-decoration: none; 
   text-shadow:
    -1px -1px 0 white,
     1px -1px 0 white,
    -1px  1px 0 white,
     1px  1px 0 white,
     0 0 5px white;
                  }

@media screen and (max-width: 1023px) {

   .nav-toggle:after {
   font-size: 2rem;
   
   
                  }
}


.nav-toggle:hover {
    color: #000000; 
}


[id='nav-toggle'] {
    position: absolute;
    display: none;
}


[id='nav-toggle']:checked ~ .nav > .nav-toggle {
    right: 0px;
    left: auto;
    top: 0px;
}


[id='nav-toggle']:checked ~ .nav {
    left: 0;

    overflow-y: auto;
}


[id='nav-toggle']:checked ~ .nav > .nav-toggle:after {
    content: '✕'; 
    font-size: 4rem;
    color: black;
    text-decoration: none;
    text-shadow:
    -1px -1px 0 white,
     1px -1px 0 white,
    -1px  1px 0 white,
     1px  1px 0 white,
     0 0 5px white;
}

@media screen and (max-width: 1023px) {

[id='nav-toggle']:checked ~ .nav > .nav-toggle:after {
     font-size: 3rem;
}

}


@media screen and (min-width: 350px) {
    html,
    body {
      margin: 0;
      overflow-x: hidden;
    }
}

@media screen and (max-width: 350px) {
    html,
    body {
      margin: 0;
      overflow-x: hidden;
    }
    .nav {
      width: 100%;
      box-shadow: none
    }
}




.nav > ul {
    display: block;
    margin: 0;
    padding: 0;
    list-style: none;
}

.nav > ul > li {
    line-height: 2.5;
    opacity: 0;
    -webkit-transform: translateX(-50%);
    -moz-transform: translateX(-50%);
    -ms-transform: translateX(-50%);
    transform: translateX(-50%);
    -webkit-transition: opacity .5s .1s, -webkit-transform .5s .1s;
    -moz-transition: opacity .5s .1s, -moz-transform .5s .1s;
    -ms-transition: opacity .5s .1s, -ms-transform .5s .1s;
    transition: opacity .5s .1s, transform .5s .1s;
}

[id='nav-toggle']:checked ~ .nav > ul > li {
    opacity: 1;
    -webkit-transform: translateX(0);
    -moz-transform: translateX(0);
    -ms-transform: translateX(0);
    transform: translateX(0);
}



.nav > ul > li > a {
    display: inline-block;
    position: relative;
    padding: 0;
    font-weight: 300;
    font-size: 1.5rem;
    color: #4bc172;
    width: 100%;
    text-decoration: none;
    -webkit-transition: color .5s ease, padding .5s ease;
    -moz-transition: color .5s ease, padding .5s ease;
    transition: color .5s ease, padding .5s ease;
}


.nav > ul > li > a:hover,
.nav > ul > li > a:focus {
    color: #337ab7;
    padding-left: 15px;
}


.nav > ul > li > a:before {
    content: '';
    display: block;
    position: absolute;
    right: 0;
    bottom: 0;
    height: 1px;
    width: 100%;
    -webkit-transition: width 0s ease;
    transition: width 0s ease;
}

.nav > ul > li > a:after {
    content: '';
    display: block;
    position: absolute;
    left: 0;
    bottom: 0;
    height: 1px;
    width: 100%;
    background: #000000;
    -webkit-transition: width .5s ease;
    transition: width .5s ease;
}


.nav > ul > li > a:hover:before {
    width: 100%;
    background: #ffffff;
    -webkit-transition: width .5s ease;
    transition: width .5s ease;
}

.nav > ul > li > a:hover:after {
    width: 0%;
    background: transparent;
    -webkit-transition: width 0s ease;
    transition: width 0s ease;
}


.mask-content {
    display: block;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1000;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    visibility: hidden;
    opacity: 0;
}

[id='nav-toggle']:checked ~ .mask-content {
    visibility: visible;
    opacity: 1;
    -webkit-transition: opacity .5s, visibility .5s;
    transition: opacity .5s, visibility .5s;
}


@media (prefers-color-scheme: dark) {


[id='nav-toggle']:checked ~ .nav > .nav-toggle:after {
    color: #000;

}

  .nav {
    background: #1d2028 !important;
  }

  .nav-toggle {
    color: #fff !important;
  }

  .nav-toggle:hover {
    color: #ccc;
  }

  .nav > ul > li > a {
    color: #4bc172;
  }

  .nav > ul > li > a:hover,
  .nav > ul > li > a:focus {
    color: #fff;
  }

  .nav > ul > li > a:after {
    background: #ccc;
  }

  .nav > ul > li > a:hover:before {
    background: #fff;
  }

  .nav > ul > li > a:hover:after {
    background: transparent;
  }

  .mask-content {
    background-color: rgba(0, 0, 0, 0.7);
  }
}


.nav > ul,
.nav > .nav-toggle {
  direction: ltr;
}