.header__nav-item--mega {
  position: static;
}

.header__nav-toggle {
  gap: 8px;
}

.header__nav-chevron {
  width: 11px;
  height: 11px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform 0.35s var(--header-ease);
}

.header__nav-item--mega.is-open .header__nav-chevron {
  transform: rotate(180deg);
}

.header__nav-item--mega.is-open .header__nav-toggle {
  background-color: var(--color-bg);
}

.header--compact .header__nav-item--mega.is-open .header__nav-toggle {
  color: #fff;
  background-color: rgba(255, 255, 255, 0.14);
}

.mega {
  position: absolute;
  top: calc(100% + 14px);
  left: 50%;
  z-index: 5;
  width: min(1320px, calc(100vw - 2 * var(--container-padding)));
  padding: 28px;

  background: linear-gradient(165deg, #ffffff 0%, #f2f6f9 100%);
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: 28px;
  box-shadow: 0 30px 70px rgba(20, 28, 35, 0.14);
  opacity: 0;
  visibility: hidden;
  transform: translate3d(-50%, -14px, 0) scale(0.985);
  transform-origin: 50% 0;
  transition:
    opacity 0.32s ease,
    transform 0.45s var(--header-ease),
    visibility 0.32s;
}

.header__nav-item--mega.is-open .mega {
  opacity: 1;
  visibility: visible;
  transform: translate3d(-50%, 0, 0) scale(1);
}

.mega__inner {
  display: grid;
  grid-template-columns: 24% 1fr 27%;
  gap: 0 28px;
}

.mega__intro,
.mega__aside,
.mega__item {
  opacity: 0;
  transform: translate3d(0, 12px, 0);
  transition:
    opacity 0.35s ease,
    transform 0.45s var(--header-ease);
}

.header__nav-item--mega.is-open .mega__intro,
.header__nav-item--mega.is-open .mega__aside,
.header__nav-item--mega.is-open .mega__item {
  opacity: 1;
  transform: none;
  transition-delay: calc(0.08s + var(--i, 0) * 0.045s);
}

.mega__item:nth-child(1) { --i: 1; }
.mega__item:nth-child(2) { --i: 2; }
.mega__item:nth-child(3) { --i: 3; }
.mega__item:nth-child(4) { --i: 4; }
.mega__item:nth-child(5) { --i: 5; }
.mega__item:nth-child(6) { --i: 6; }
.mega__aside { --i: 3; }

.mega__intro {
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  padding: 8px 4px 0;
}

.mega__label {
  margin-bottom: 14px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.mega__title {
  margin-bottom: 14px;
  font-size: 27px;
  font-weight: 500;
  line-height: 1.12;
  letter-spacing: -0.03em;
  color: var(--color-text);
}

.mega__text {
  font-size: 15px;
  line-height: 1.5;
  color: var(--color-muted);
}

.mega__more {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-top: 20px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
}

.mega__more-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border: 1px solid #d5dee6;
  border-radius: 50%;
  transition: color var(--transition), background-color var(--transition), border-color var(--transition);
}

.mega__more-icon svg {
  width: 15px;
  height: 15px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.mega__more:hover .mega__more-icon {
  color: #fff;
  background-color: var(--color-dark);
  border-color: var(--color-dark);
}

.mega__spiral--intro {
  width: 116%;
  margin-top: auto;
  margin-left: -14%;
  margin-bottom: -13%;
  padding-top: 20px;
}

.mega__list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-inline: 20px;
  border-left: 1px solid rgba(20, 28, 35, 0.07);
  border-right: 1px solid rgba(20, 28, 35, 0.07);
}

.mega__link {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 16px;
  border-radius: 18px;
  transition: background-color var(--transition);
}

.mega__link:hover {
  background-color: rgba(255, 255, 255, 0.95);
}

.mega__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  color: var(--color-dark);
  background: linear-gradient(145deg, #eef3f7, #e2eaf1);
  border-radius: 50%;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.9);
  transition: background var(--transition), box-shadow var(--transition), transform var(--transition);
}

.mega__icon svg {
  width: 21px;
  height: 21px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.mega__link:hover .mega__icon {
  background: var(--color-surface);
  box-shadow: 0 8px 18px rgba(30, 50, 70, 0.12);
  transform: scale(1.05);
}

.mega__body {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.mega__name {
  font-size: 16px;
  font-weight: 500;
  color: var(--color-text);
}

.mega__desc {
  font-size: 14px;
  line-height: 1.4;
  color: var(--color-muted);
}

.mega__arrow {
  flex-shrink: 0;
  width: 19px;
  height: 19px;
  margin-left: auto;
  fill: none;
  stroke: #9aa8b4;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: 0.6;
  transition: transform var(--transition), opacity var(--transition), stroke var(--transition);
}

.mega__link:hover .mega__arrow {
  stroke: var(--color-dark);
  opacity: 1;
  transform: translateX(4px);
}

.mega__aside {
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 8px 4px 8px 0;
}

.mega__spiral--aside {
  width: 84%;
  margin-left: auto;
  margin-right: -6%;
  margin-bottom: 6px;
}

.mega__title--aside {
  margin-bottom: 10px;
}

.mega__learn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 18px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
}

.mega__learn svg {
  width: 17px;
  height: 17px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform var(--transition);
}

.mega__learn:hover svg {
  transform: translateX(4px);
}

@media (prefers-reduced-motion: reduce) {
  .mega,
  .mega__intro,
  .mega__aside,
  .mega__item {
    transition-duration: 0.01ms;
  }
}

@media (max-width: 1500px) {
  .mega {
    padding: 24px;
  }

  .mega__inner {
    grid-template-columns: 25% 1fr 26%;
    gap: 0 20px;
  }

  .mega__title {
    font-size: 24px;
  }

  .mega__link {
    padding: 12px 14px;
  }

  .mega__desc {
    font-size: 13px;
  }
}

@media (max-width: 1200px) {
  .mega {
    top: calc(100% + 10px);
    padding: 20px;
    border-radius: 24px;
  }

  .mega__inner {
    grid-template-columns: 30% 1fr;
  }

  .mega__aside {
    display: none;
  }

  .mega__list {
    border-right: 0;
    padding-right: 0;
  }

  .mega__title {
    font-size: 22px;
  }

  .mega__icon {
    width: 40px;
    height: 40px;
  }
}

@media (max-width: 1024px) {
  .header__nav-toggle {
    justify-content: space-between;
    width: 100%;
  }

  .mega {
    position: static;
    width: auto;
    padding: 0;
    background: none;
    border: 0;
    border-radius: 0;
    box-shadow: none;
    opacity: 1;
    visibility: visible;
    transform: none;
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows 0.4s var(--header-ease);
  }

  .header__nav-item--mega.is-open .mega {
    grid-template-rows: 1fr;
    transform: none;
  }

  .mega__inner {
    overflow: hidden;
    grid-template-columns: 1fr;
    min-height: 0;
  }

  .mega__intro,
  .mega__spiral {
    display: none;
  }

  .mega__list {
    gap: 4px;
    padding: 6px 0 10px;
    border: 0;
  }

  .mega__link {
    padding: 10px 14px;
    background-color: var(--color-bg);
  }

  .mega__icon {
    width: 38px;
    height: 38px;
  }

  .mega__icon svg {
    width: 18px;
    height: 18px;
  }

  .mega__name {
    font-size: 15px;
  }

  .mega__desc {
    display: none;
  }

  .header__nav-item--mega.is-open .mega__item {
    transition-delay: calc(var(--i, 0) * 0.04s);
  }
}