.hamburger-menu{position:relative;}
/* скрываем чекбокс */
#menu__toggle {
    opacity: 0;
}
*{
  font-family:Helvetika, 'Roboto', sans-serif;
  font-weight: 500;
}
/* стилизуем кнопку */
.menu__btn {
  margin-left:auto;
  display:block;
  margin-right:5px;
  margin-top:-50px;
  max-width: 38px;
  height: 30px;
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  align-items: center;
  cursor: pointer;
}
  /* добавляем "гамбургер" */
.menu__btn > span,
.menu__btn > span::before,
.menu__btn > span::after {
    display: block;
    position: absolute;
    width: 38px;
    height: 2px;
    background-color: #fff;
}
  .menu__btn > span::before {
    content: '';
    top: -8px;
  }
  .menu__btn > span::after {
    content: '';
    top: 8px;
  }
  /* контейнер меню */
.menu__box {
    display: block;
    visibility: hidden;
    top: 40px;
    right: 0;
    width: 300px;
    height: auto;
    padding: 20px 10px 35px 40px;
    list-style: none;
    text-align: left;
    background-color: #ff9900;
    position:absolute;
  }
  /* элементы меню */
  .menu__item {
    display: block;
    padding: 12px 24px;
    color: #fff;
    /*font-family: 'Roboto', sans-serif;*/
    font-size: 16px;
    font-weight: 500;
    text-decoration: none;
  }
  .menu__item:hover {
    color: #000;
    font-weight: 900;
  }


    
  #menu__toggle:checked ~ .menu__btn > span {
    transform: rotate(45deg);
  }
  #menu__toggle:checked ~ .menu__btn > span::before {
    top: 0;
    transform: rotate(0);
  }
  #menu__toggle:checked ~ .menu__btn > span::after {
    top: 0;
    transform: rotate(90deg);
  }
  #menu__toggle:checked ~ .menu__box {
    visibility: visible;
    margin-right:0;
    margin-left:auto;
    margin-top:-35px;
}