/*
 * @file
 * CSS for the responsive menu toggle checkbox / button.
 */

 /**
  * Menu toggle button
  */
.menu-toggle-button {
  position: relative;
  display: inline-block;
  text-indent: 28px;
  min-width: 1.5rem;
  min-height: 1.5rem;
  white-space: nowrap;
  overflow: hidden;
  cursor: pointer;
  -webkit-tap-highlight-color: rgba(0,0,0,0);
}
@media (min-width: 25em) { /* 400px @ 16px font size */
  .menu-toggle-button {
    width: auto;
  }
}

@media (min-width: 48em) {  /* 768px @ 16px font size */
  /* hide the button in desktop view */
  .menu-toggle-button,
  .menu-toggle-state {
    display: none;
  }
}
.menu-toggle-button-text {
  vertical-align: middle;
  padding: 0 .5em;
}

/**
 * Hamburger icon.
 */
.menu-toggle-button-icon,
.menu-toggle-button-icon:before,
.menu-toggle-button-icon:after {
  position: absolute;
  top: 50%;
  left: 2px; /* LTR */
  height: 2px;
  width: 24px;
  background: #bbb;
  transition: all 0.25s;
}
[dir="rtl"] .menu-toggle-button-icon {
  right: 2px;
}
.menu-toggle-button-icon:before {
  content: '';
  top: -7px;
  left: 0; /* LTR */
}
.menu-toggle-button-icon:after {
  content: '';
  top: 7px;
  left: 0; /* LTR */
}
[dir="rtl"] .menu-toggle-button-icon:before,
[dir="rtl"] .menu-toggle-button-icon:after {
  right: 0;
}

/**
 * Close icon.
 */
.menu-toggle-state:checked ~ .menu-toggle-button .menu-toggle-button-icon {
  height: 0;
  background: transparent;
}
.menu-toggle-state:checked ~ .menu-toggle-button .menu-toggle-button-icon:before {
  top: 0;
  transform: rotate(-45deg);
}
.menu-toggle-state:checked ~ .menu-toggle-button .menu-toggle-button-icon:after {
  top: 0;
  transform: rotate(45deg);
}

/**
 * Menu state checkbox.
 */
.menu-toggle-state {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  border: 0;
  padding: 0;
  overflow: hidden;
  clip: rect(1px,1px,1px,1px);
}
.menu-toggle-state ~ .menu {
  display: none;
}
/* Hide the menu in mobile view. */
.menu-toggle-state:not(:checked) ~ .menu {
  display: none;
}
.menu-toggle-state:checked ~ .menu {
  display: block;
}
@media (min-width: 48em) {  /* 768px @ 16px font size. */
  /* Always show the menu in desktop view. */
  .menu-toggle-state:not(:checked) ~ .menu {
    display: block;
  }
}

File

core/modules/system/css/menu-toggle.theme.css