/* HEADER */

.site-header {
  position: fixed;
  top: 0;
  inset-inline: 0;
  z-index: var(--z-header);
  transition:
    background-color var(--dur-base) var(--ease-out),
    border-color var(--dur-base) var(--ease-out),
    backdrop-filter var(--dur-base) var(--ease-out);
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  background: rgba(247, 247, 243, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--color-line);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  padding-block: 18px;
}

.site-header__brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  line-height: 1;
  text-decoration: none;
  color: var(--color-primary);
}

.site-header__logo {
  font-weight: 700;
  font-size: 19px;
  letter-spacing: 0.08em;
}

.site-header__sub {
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  opacity: 0.6;
}

html[lang="ar"] .site-header__sub {
  letter-spacing: 0;
}

.site-header__nav {
  display: flex;
  align-items: center;
  gap: 36px;
}

.site-header__link {
  position: relative;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--color-primary);
  padding: 6px 0;
  transition: opacity var(--dur-fast) var(--ease-out);
  opacity: 0.78;
}

.site-header__link::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  bottom: 0;
  height: 1px;
  background: var(--color-primary);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur-base) var(--ease-out);
}

html[dir="rtl"] .site-header__link::after {
  transform-origin: right center;
}

.site-header__link:hover {
  opacity: 1;
}

.site-header__link.is-active {
  opacity: 1;
}

.site-header__link.is-active::after {
  transform: scaleX(1);
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.site-header__cta {
  display: inline-flex;
}

.site-header__menu-btn {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 6px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-line);
  transition: border-color var(--dur-fast) var(--ease-out);
}

.site-header__menu-btn:hover {
  border-color: var(--color-primary);
}

.site-header__menu-bar {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--color-primary);
  transition: transform var(--dur-base) var(--ease-out);
}

/* MOBILE MENU OVERLAY */

.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: var(--z-menu);
  background: var(--color-warm-bg);
  display: flex;
  flex-direction: column;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-base) var(--ease-out);
}

.mobile-menu.is-open {
  opacity: 1;
  pointer-events: auto;
}

.mobile-menu__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 22px;
}

.mobile-menu__close {
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-line);
  color: var(--color-primary);
}

.mobile-menu__nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-inline: var(--container-pad);
  gap: 8px;
}

.mobile-menu__link {
  display: flex;
  align-items: baseline;
  gap: 18px;
  padding: 16px 0;
  font-size: clamp(34px, 8vw, 56px);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-line);
  transform: translateY(20px);
  opacity: 0;
  transition:
    transform var(--dur-slow) var(--ease-out),
    opacity var(--dur-slow) var(--ease-out),
    color var(--dur-fast) var(--ease-out);
  transition-delay: calc(120ms + var(--i) * 70ms);
}

.mobile-menu.is-open .mobile-menu__link {
  transform: translateY(0);
  opacity: 1;
}

.mobile-menu__link-num {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.22em;
  opacity: 0.45;
  align-self: center;
}

.mobile-menu__bottom {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding-block: 24px;
}

.mobile-menu__cta {
  align-self: flex-start;
}

.mobile-menu__meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 13px;
  opacity: 0.7;
}

@media (max-width: 1024px) {
  .site-header__nav,
  .site-header__cta {
    display: none;
  }
  .site-header__menu-btn {
    display: inline-flex;
  }
}

@media (min-width: 1025px) {
  .mobile-menu {
    display: none;
  }
}