/* ---------▽-Hamburger Menu Icon-▽--------- */

#menu-toggle {
  display: inline-block;
  position: fixed;
  top: 36px;
  left: 15px;
  z-index: 1;
}

#menu-toggle input {
  display: block;
  width: 40px;
  height: 31px;
  position: absolute;
  top: -7px;
  left: -9px;
  cursor: pointer;
  /* ▽ Hide checkbox */
  opacity: 0;
  /* ▽ Place it over the hamburger */
  z-index: 2;
}

#menu-toggle span {
  display: block;
  width: 33px;
  height: 4px;
  margin-bottom: 5px;
  position: relative;
  background: var(--menu-bg-color);
  border-radius: 3px;
  z-index: 1;
  transition: transform 500ms cubic-bezier(0.77, 0.2, 0.05, 1),
              background 500ms cubic-bezier(0.77, 0.2, 0.05, 1),
              opacity 550ms ease;
}

/* nth-child(2) == top (1st) span */
#menu-toggle span:nth-child(2) {
  transform-origin: top left;
}

/* nth-child(4) == last (3rd) span */
#menu-toggle span:nth-child(4) {
  transform-origin: bottom left;
}

/* Transform all the spans of hamburger into an "X" */
/* Take first span, rotate 45° and move 3px left*/
#menu-toggle input:checked ~ span:nth-child(2) {
  transform: rotate(45deg) translate(-3px);
  background: var(--menu-item-color);
}

/* Hide and shrink the middle span */
/* nth-child(3) == middle (2nd) span */
#menu-toggle input:checked ~ span:nth-child(3) {
  opacity: 0;
  transform: scale(0, 0);
}

/* Reverse the rotation of the last span and move 3px left */
#menu-toggle input:checked ~ span:nth-child(4) {
  transform: rotate(-45deg) translate(-3px);
  background: var(--menu-item-color);
}

/* ---------△-Hamburger Menu Icon-△--------- */
/* ---------▽-Slide-Out-Menu-▽--------- */

#slide-out-menu {
  position: fixed;
  width: min-content;
  top: 0;
  left: 0;
  padding: 30px 24px 0px 58px;
  line-height: 1.25em;
  background: var(--menu-bg-color);
  font-family: var(--menu-font);
  transform-origin: top left;
  transform: translate(-100%, 0);
  transition: transform 500ms cubic-bezier(0.77, 0.2, 0.05, 1);
}

#slide-out-menu li {
  padding-bottom: 20px;
}

#slide-out-menu .nav-link {
  display: block;
  font-size: 1.5em;
  text-decoration: none;
  color: var(--menu-item-color);
  transition: color 300ms ease;
}

#slide-out-menu a:hover {
  color: var(--menu-link-hover-color);
}

nav {
  display: none;
}

/* Slides menu in from the left */
#menu-toggle input:checked ~ #slide-out-menu {
  transform: none;
}

/* ---------△-Slide-Out-Menu-△--------- */
/* ---------------▽-Sidebar-▽--------------- */

#sidebar {
  height: 100dvh;
  width: var(--side-bar-width);
  position: fixed;
  top: 0px;
  padding: 10px;
  background-color: var(--menu-bg-color);
  line-height: 1em;
  font-family: var(--menu-font);
  font-size: 1.2em;
  box-shadow: 4px 0px 4px rgba(0, 0, 0, 0.25);
}

#sidebar li {
  padding-bottom: 20px;
}

#sidebar .nav-link {
  display: block;
  text-decoration: none;
  color: var(--menu-item-color);
  transition: color 300ms ease;
}

#sidebar a:hover {
  color: var(--menu-link-hover-color);
}

/* ---------------△-Sidebar-△--------------- */

@media screen and (max-width: 823px) {
  nav {
    display: block;
  }
  footer {
    margin-left: 0;
  }
  #sidebar {
    display: none;
  }
  #main-doc {
    margin-left: 63px;
    width: auto;
  }
}