.dasty-sticky-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 56px;
  height: 100vh;
  z-index: 999;
  background: #fff;
  border-right: 1px solid #e8e8e8;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: width .3s ease;
}

.dasty-sticky-nav:hover,
.dasty-sticky-nav.is-expanded {
  width: 270px;
}

.dasty-sticky-nav__header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 16px;
  background: #1a2a4a;
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .5px;
  flex-shrink: 0;
  min-height: 52px;
  white-space: nowrap;
}

.dasty-sticky-nav__header-icon {
  flex-shrink: 0;
}

.dasty-sticky-nav__header-text {
  opacity: 0;
  transition: opacity .25s ease .1s;
}

.dasty-sticky-nav:hover .dasty-sticky-nav__header-text,
.dasty-sticky-nav.is-expanded .dasty-sticky-nav__header-text {
  opacity: 1;
}

.dasty-sticky-nav__body {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
}

.dasty-sticky-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.dasty-sticky-nav__item {
  margin: 0;
  border-bottom: 1px solid #f0f0f0;
  position: relative;
  white-space: nowrap;
}

.dasty-sticky-nav__link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  font-size: 13px;
  font-weight: 500;
  color: #333;
  text-decoration: none;
  transition: background .2s, color .2s;
  min-height: 48px;
}

.dasty-sticky-nav__link:hover,
.dasty-sticky-nav__link:focus {
  background: #f8f9fa;
  color: #1a2a4a;
}

.dasty-sticky-nav__icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  object-fit: contain;
}

.dasty-sticky-nav__label {
  opacity: 0;
  transition: opacity .2s ease;
}

.dasty-sticky-nav:hover .dasty-sticky-nav__label,
.dasty-sticky-nav.is-expanded .dasty-sticky-nav__label {
  opacity: 1;
}

.dasty-sticky-nav__item.menu-item-has-children > .dasty-sticky-nav__link::after {
  content: '';
  margin-left: auto;
  border: solid #999;
  border-width: 0 2px 2px 0;
  display: inline-block;
  padding: 3px;
  transform: rotate(-45deg);
  transition: transform .2s;
  opacity: 0;
}

.dasty-sticky-nav:hover .dasty-sticky-nav__item.menu-item-has-children > .dasty-sticky-nav__link::after,
.dasty-sticky-nav.is-expanded .dasty-sticky-nav__item.menu-item-has-children > .dasty-sticky-nav__link::after {
  opacity: 1;
}

.dasty-sticky-nav__item.menu-item-has-children:hover > .dasty-sticky-nav__link::after {
  transform: rotate(45deg);
}

.dasty-sticky-nav .sub-menu {
  display: none;
  list-style: none;
  margin: 0;
  padding: 0 0 0 0;
  background: #fafafa;
}

.dasty-sticky-nav__item:hover > .sub-menu {
  display: block;
  position: absolute;
  left: 100%;
  top: 0;
  min-width: 220px;
  border-left: 1px solid #e8e8e8;
  box-shadow: 4px 4px 12px rgba(0,0,0,.08);
  background: #fff;
  z-index: 10;
}

.dasty-sticky-nav .sub-menu .sub-menu {
  left: 100%;
  top: 0;
}

.dasty-sticky-nav .sub-menu .dasty-sticky-nav__item {
  border-bottom: 1px solid #f0f0f0;
}

.dasty-sticky-nav .sub-menu .dasty-sticky-nav__link {
  padding: 10px 18px;
  font-size: 12px;
  color: #555;
  min-height: auto;
}

.dasty-sticky-nav .sub-menu .dasty-sticky-nav__link:hover {
  color: #1a2a4a;
  background: #f5f5f5;
}

.dasty-sticky-nav__body::-webkit-scrollbar {
  width: 3px;
}

.dasty-sticky-nav__body::-webkit-scrollbar-track {
  background: transparent;
}

.dasty-sticky-nav__body::-webkit-scrollbar-thumb {
  background: #ccc;
  border-radius: 2px;
}

@media (min-width: 1025px) {
  body {
    padding-left: 56px;
    transition: padding-left .3s ease;
  }

  .dasty-sticky-nav:hover ~ body,
  .dasty-sticky-nav.is-expanded ~ body {
    padding-left: 270px;
  }
}

@media (max-width: 1024px) {
  .dasty-sticky-nav {
    display: none;
    width: 280px;
  }

  .dasty-sticky-nav.is-expanded {
    display: flex;
  }

  .dasty-sticky-nav .dasty-sticky-nav__label,
  .dasty-sticky-nav .dasty-sticky-nav__header-text,
  .dasty-sticky-nav .dasty-sticky-nav__item.menu-item-has-children > .dasty-sticky-nav__link::after {
    opacity: 1;
  }

  body {
    padding-left: 0 !important;
  }

  .dasty-sticky-nav .sub-menu {
    display: none;
  }

  .dasty-sticky-nav__item:hover > .sub-menu {
    display: block;
    position: static;
    box-shadow: none;
    border-left: none;
  }
}