/* ARCSTEEL — Header & Mega Menu */

.as-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--as-header-h);
  z-index: var(--as-z-header);
  transition:
    background var(--as-duration) var(--as-ease),
    backdrop-filter var(--as-duration) var(--as-ease),
    box-shadow var(--as-duration) var(--as-ease),
    border-color var(--as-duration) var(--as-ease);
  background: transparent;
  border-bottom: 1px solid transparent;
}

.as-header.is-scrolled {
  background: rgba(15, 15, 16, 0.85);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  border-bottom-color: var(--as-border);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
}

/* Mobile menu open: drop filter so fixed nav uses viewport (not 90px header) */
.as-header.is-menu-open,
.as-header.is-menu-open.is-scrolled {
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  background: rgba(15, 15, 16, 0.98);
}

.as-header__inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1.5rem;
  height: var(--as-header-h);
  max-width: var(--as-container);
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 48px);
}

/* Logo — wide wordmark on dark surfaces */
.as-logo {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  z-index: 2;
  line-height: 0;
}

.as-logo__img {
  display: block;
  height: 68px;
  width: auto;
  max-width: min(300px, 48vw);
  object-fit: contain;
  object-position: left center;
  /* No CSS color filters — they soften raster edges */
  transform: translateZ(0);
  backface-visibility: hidden;
}

.as-logo__mark {
  width: 42px;
  height: 42px;
  flex-shrink: 0;
}

.as-logo__word {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1;
}

.as-logo__word .arc {
  color: var(--as-red);
}

.as-logo__word .steel {
  color: var(--as-white);
}

/* Nav center */
.as-nav {
  display: flex;
  justify-content: center;
  align-items: stretch;
  height: 100%;
}

.as-nav__list {
  display: flex;
  align-items: stretch;
  gap: clamp(0.5rem, 1.5vw, 1.75rem);
  height: 100%;
}

.as-nav__item {
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
}

.as-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 100%;
  padding: 0 0.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.82);
  transition: color var(--as-duration-fast) var(--as-ease);
  position: relative;
}

.as-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--as-red);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--as-duration) var(--as-ease);
}

.as-nav__link:hover,
.as-nav__item.is-open > .as-nav__link,
.as-nav__link.is-active {
  color: var(--as-white);
}

.as-nav__link:hover::after,
.as-nav__item.is-open > .as-nav__link::after,
.as-nav__link.is-active::after {
  transform: scaleX(1);
  transform-origin: left;
}

.as-nav__chevron {
  width: 14px;
  height: 14px;
  opacity: 0.6;
  transition: transform var(--as-duration-fast) var(--as-ease);
}

.as-nav__item.is-open .as-nav__chevron {
  transform: rotate(180deg);
}

/* Mega Menu — flush to nav item so hover path never breaks */
.as-mega {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  width: min(920px, calc(100vw - 40px));
  padding: 1rem 0 0; /* hover bridge */
  background: transparent;
  border: none;
  box-shadow: none;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition:
    opacity var(--as-duration) var(--as-ease),
    transform var(--as-duration) var(--as-ease),
    visibility var(--as-duration) var(--as-ease);
  z-index: var(--as-z-mega);
}

.as-mega__panel {
  padding: 2rem;
  background: rgba(20, 20, 22, 0.96);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--as-border-strong);
  border-radius: var(--as-radius);
  box-shadow: var(--as-shadow);
}

.as-nav__item.is-open .as-mega {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.as-mega__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

.as-mega__item {
  display: flex;
  gap: 1rem;
  padding: 1.15rem;
  border-radius: var(--as-radius-sm);
  border: 1px solid transparent;
  transition:
    background var(--as-duration-fast) var(--as-ease),
    border-color var(--as-duration-fast) var(--as-ease);
}

.as-mega__item:hover {
  background: rgba(193, 18, 31, 0.08);
  border-color: rgba(193, 18, 31, 0.2);
}

.as-mega__icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: rgba(193, 18, 31, 0.12);
  color: var(--as-red);
}

.as-mega__icon svg {
  width: 22px;
  height: 22px;
}

.as-mega__title {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--as-white);
  margin-bottom: 0.25rem;
}

.as-mega__desc {
  font-size: 0.8rem;
  color: var(--as-text-muted);
  line-height: 1.5;
}

.as-mega__footer {
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--as-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.as-mega__footer p {
  font-size: 0.8125rem;
  color: var(--as-text-muted);
  margin: 0;
}

/* Simple dropdown — no gap between trigger and panel */
.as-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  padding: 0.85rem 0 0; /* invisible hover bridge */
  background: transparent;
  border: none;
  box-shadow: none;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(6px);
  transition:
    opacity var(--as-duration) var(--as-ease),
    transform var(--as-duration) var(--as-ease),
    visibility var(--as-duration) var(--as-ease);
  z-index: var(--as-z-mega);
}

.as-dropdown__panel {
  padding: 0.75rem;
  background: rgba(20, 20, 22, 0.96);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--as-border-strong);
  border-radius: var(--as-radius-sm);
  box-shadow: var(--as-shadow);
}

.as-nav__item.is-open .as-dropdown {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}

.as-dropdown a {
  display: block;
  padding: 0.7rem 0.9rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--as-gray-light);
  border-radius: 8px;
  transition: background var(--as-duration-fast) var(--as-ease), color var(--as-duration-fast) var(--as-ease);
}

.as-dropdown a:hover {
  background: rgba(193, 18, 31, 0.1);
  color: var(--as-white);
}

/* Actions right */
.as-header__actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
  z-index: 2;
}

.as-header__portal {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--as-gray-light);
  padding: 0.4rem 0.5rem;
  transition: color var(--as-duration-fast) var(--as-ease);
}

.as-header__portal:hover {
  color: var(--as-red);
}

.as-header__cta {
  display: none;
}

@media (min-width: 1200px) {
  .as-header__cta {
    display: inline-flex;
  }
}

/* Burger */
.as-burger {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  border: 1px solid var(--as-border);
  background: rgba(255, 255, 255, 0.03);
}

.as-burger span,
.as-burger span::before,
.as-burger span::after {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--as-white);
  border-radius: 1px;
  position: relative;
  transition: transform var(--as-duration) var(--as-ease), opacity var(--as-duration) var(--as-ease);
}

.as-burger span::before,
.as-burger span::after {
  content: "";
  position: absolute;
  left: 0;
}

.as-burger span::before { top: -6px; }
.as-burger span::after { top: 6px; }

.as-burger.is-active span {
  background: transparent;
}

.as-burger.is-active span::before {
  top: 0;
  transform: rotate(45deg);
}

.as-burger.is-active span::after {
  top: 0;
  transform: rotate(-45deg);
}

/* Mobile nav */
@media (max-width: 1199.98px) {
  .as-burger {
    display: inline-flex;
  }

  .as-nav {
    position: fixed;
    top: var(--as-header-h);
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: calc(100vh - var(--as-header-h));
    height: calc(100dvh - var(--as-header-h));
    background: rgba(15, 15, 16, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 1.5rem clamp(20px, 4vw, 48px) 2.5rem;
    overflow-x: hidden;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translate3d(0, -8px, 0);
    transition:
      opacity var(--as-duration) var(--as-ease),
      transform var(--as-duration) var(--as-ease),
      visibility var(--as-duration) var(--as-ease);
    justify-content: flex-start;
    align-items: stretch;
    z-index: var(--as-z-overlay);
  }

  .as-nav.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translate3d(0, 0, 0);
  }

  .as-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
    height: auto;
  }

  .as-nav__link {
    width: 100%;
    height: auto;
    justify-content: space-between;
    padding: 1.1rem 0;
    font-size: 1.05rem;
    border-bottom: 1px solid var(--as-border);
  }

  .as-nav__link::after {
    display: none;
  }

  .as-mega,
  .as-dropdown {
    position: static;
    transform: none;
    width: 100%;
    max-height: 0;
    padding: 0;
    margin: 0;
    border: none;
    background: transparent;
    box-shadow: none;
    overflow: hidden;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transition: max-height var(--as-duration-slow) var(--as-ease), padding var(--as-duration) var(--as-ease);
  }

  .as-mega__panel,
  .as-dropdown__panel {
    background: transparent;
    border: none;
    box-shadow: none;
    backdrop-filter: none;
    padding: 0;
    border-radius: 0;
  }

  .as-nav__item.is-open .as-mega,
  .as-nav__item.is-open .as-dropdown {
    max-height: 800px;
    padding: 0.75rem 0 1rem;
    transform: none;
  }

  .as-nav__item {
    height: auto;
    display: block;
  }

  .as-mega__grid {
    grid-template-columns: 1fr;
  }

  .as-mega__footer {
    flex-direction: column;
    align-items: flex-start;
  }

  .as-header__inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
  }

  .as-header__actions {
    margin-left: auto;
    flex-shrink: 0;
  }

  .as-header__portal {
    display: none;
  }
}

@media (max-width: 575.98px) {
  .as-header__actions {
    gap: 0;
  }

  .as-logo__img {
    height: 58px;
    max-width: min(240px, 58vw);
  }

  .as-logo__word {
    font-size: 1.05rem;
  }

  .as-logo__mark {
    width: 36px;
    height: 36px;
  }

  .as-lang__btn span {
    font-size: 0.7rem;
  }
}

/* Language switcher */
.as-lang {
  position: relative;
}

.as-lang__btn {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  min-height: 36px;
  padding: 0 0.65rem;
  border: 1px solid var(--as-border);
  border-radius: var(--as-radius-sm, 6px);
  background: rgba(255, 255, 255, 0.04);
  color: var(--as-text, #f4f4f5);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  cursor: pointer;
}

.as-lang__btn i {
  width: 14px;
  height: 14px;
  opacity: 0.7;
}

.as-lang__menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 148px;
  margin: 0;
  padding: 0.35rem;
  list-style: none;
  border: 1px solid var(--as-border);
  border-radius: var(--as-radius-sm, 6px);
  background: rgba(15, 15, 16, 0.96);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
  z-index: 50;
}

.as-lang__menu a {
  display: block;
  padding: 0.55rem 0.7rem;
  border-radius: 4px;
  color: var(--as-text, #f4f4f5);
  text-decoration: none;
  font-size: 0.85rem;
}

.as-lang__menu a:hover,
.as-lang__menu [aria-selected="true"] a {
  background: rgba(255, 255, 255, 0.08);
}

html[dir="rtl"] .as-lang__menu {
  right: auto;
  left: 0;
}

html[dir="rtl"] .as-header__inner,
html[dir="rtl"] .as-nav__list,
html[dir="rtl"] .as-header__actions {
  direction: rtl;
}