/* ==========================================================================
   Header + Mega menu + Mobile menu + Sticky CTA
   ========================================================================== */

.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: var(--z-sticky);
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: transparent;
  transition:
    height var(--dur-base) var(--ease-out-quart),
    background var(--dur-base) var(--ease-out-quart),
    box-shadow var(--dur-base) var(--ease-out-quart),
    color var(--dur-base) var(--ease-out-quart),
    border-color var(--dur-base) var(--ease-out-quart);
  border-bottom: 1px solid transparent;
}

.site-header__inner {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-6);
}

/* Light mode (default — на тёмном hero) */
.site-header--on-dark {
  color: var(--c-white);
}

/* Scrolled — становится светлым */
.site-header.is-scrolled,
.site-header--solid {
  height: var(--header-h-scrolled);
  background: rgba(255, 255, 255, 0.78);
  backdrop-filter: saturate(1.4) blur(16px);
  -webkit-backdrop-filter: saturate(1.4) blur(16px);
  color: var(--c-text);
  border-bottom-color: var(--c-border);
}

/* Logo */
.logo {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-weight: var(--fw-extrabold);
  font-size: 1.375rem;
  letter-spacing: -0.02em;
  color: inherit;
  white-space: nowrap;
}

.logo__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-amber-500);
  box-shadow: 0 0 14px hsl(48 100% 50% / 0.7);
  margin-left: 2px;
  margin-bottom: -1px;
}

/* Image-вариант лого (assets/logo.webp) */
.logo--img {
  font-size: 0;
  line-height: 0;
  gap: 0;
}
.logo__img {
  display: block;
  height: 44px;
  width: auto;
  max-height: 100%;
  border-radius: 10px;
  object-fit: contain;
  transition: height var(--dur-base) var(--ease-out-quart);
}
.site-header.is-scrolled .logo__img {
  height: 38px;
}
.site-footer .logo--img .logo__img {
  height: 56px;
  border-radius: 12px;
}
.mobile-menu .logo--img .logo__img {
  height: 40px;
}
@media (max-width: 640px) {
  .logo__img { height: 38px; }
  .site-header.is-scrolled .logo__img { height: 34px; }
}

/* Nav */
.site-nav {
  display: none;
  align-items: center;
  gap: var(--s-1);
}

@media (min-width: 1024px) {
  .site-nav { display: flex; }
}

.nav-item {
  position: relative;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 10px 14px;
  font-size: var(--fs-body-sm);
  font-weight: var(--fw-medium);
  border-radius: var(--r-sm);
  color: inherit;
  transition: color var(--dur-fast), background var(--dur-fast);
  cursor: pointer;
}

/* Кнопка-disclosure (выпадающее меню) — выглядит как ссылка */
.nav-link--disclosure {
  background: transparent;
  border: 0;
  font-family: inherit;
  letter-spacing: inherit;
}

.nav-link:hover {
  color: var(--c-amber-500);
}

.site-header.is-scrolled .nav-link:hover,
.site-header--solid .nav-link:hover {
  color: var(--c-amber-600);
}

.nav-link__chev {
  width: 14px;
  height: 14px;
  transition: transform var(--dur-fast);
}

.nav-item:hover .nav-link__chev,
.nav-item--open .nav-link__chev,
[data-mega-trigger][aria-expanded="true"] .nav-link__chev {
  transform: rotate(180deg);
}

/* Header right */
.site-header__right {
  display: flex;
  align-items: center;
  gap: var(--s-3);
}

.header-phone {
  display: none;
  align-items: center;
  gap: var(--s-2);
  font-size: var(--fs-body-sm);
  font-weight: var(--fw-semibold);
  font-feature-settings: 'tnum';
  color: inherit;
  white-space: nowrap;
  transition: color var(--dur-fast);
}

.header-phone:hover { color: var(--c-amber-500); }

.header-phone .icon {
  width: 16px;
  height: 16px;
  color: var(--c-amber-500);
}

@media (min-width: 1280px) {
  .header-phone { display: inline-flex; }
}

.header-lk {
  display: none;
  align-items: center;
  gap: var(--s-2);
  padding: 8px 14px;
  font-size: var(--fs-body-sm);
  font-weight: var(--fw-medium);
  border-radius: var(--r-sm);
  color: inherit;
  transition: background var(--dur-fast);
}

.header-lk:hover {
  background: rgba(255, 255, 255, 0.12);
}

.site-header.is-scrolled .header-lk:hover,
.site-header--solid .header-lk:hover {
  background: var(--c-stone-100);
}

@media (min-width: 1024px) {
  .header-lk { display: inline-flex; }
}

.header-lk .icon { width: 16px; height: 16px; }

/* Burger button (mobile) */
.btn-burger {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: var(--r-sm);
  color: inherit;
  background: transparent;
  border: 0;
  cursor: pointer;
  transition: background var(--dur-fast);
}

.btn-burger:hover { background: rgba(255, 255, 255, 0.12); }

.site-header.is-scrolled .btn-burger:hover,
.site-header--solid .btn-burger:hover {
  background: var(--c-stone-100);
}

@media (min-width: 1024px) {
  .btn-burger { display: none; }
}

.btn-burger__lines {
  position: relative;
  width: 22px;
  height: 16px;
}

.btn-burger__lines::before,
.btn-burger__lines::after,
.btn-burger__lines span {
  content: '';
  display: block;
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: all var(--dur-base) var(--ease-out-quart);
}

.btn-burger__lines::before { top: 0; }
.btn-burger__lines span { top: 7px; }
.btn-burger__lines::after { bottom: 0; }

/* --------------------------------------------------------------------------
   Mega menu
   -------------------------------------------------------------------------- */
.mega {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  width: min(900px, 90vw);
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--r-xl);
  box-shadow: var(--shadow-xl);
  padding: var(--s-6);
  opacity: 0;
  pointer-events: none;
  transition:
    opacity var(--dur-base) var(--ease-out-quart),
    transform var(--dur-base) var(--ease-out-quart);
  color: var(--c-text);
  z-index: var(--z-rise);
}

.nav-item:hover .mega,
.nav-item--open .mega,
.nav-item:has([data-mega-trigger][aria-expanded="true"]) .mega {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.mega__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr) minmax(220px, 280px);
  gap: var(--s-6);
}

.mega__col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-2);
}

.mega-link {
  display: flex;
  gap: var(--s-3);
  padding: var(--s-3);
  border-radius: var(--r-md);
  transition: background var(--dur-fast);
}

.mega-link:hover { background: var(--c-stone-50); }

.mega-link__icon {
  width: 38px;
  height: 38px;
  border-radius: var(--r-sm);
  background: var(--c-stone-100);
  display: grid;
  place-items: center;
  color: var(--c-text);
  flex-shrink: 0;
  transition: background var(--dur-fast), color var(--dur-fast);
}

.mega-link:hover .mega-link__icon {
  background: var(--c-amber-500);
  color: var(--c-ink);
}

.mega-link__icon .icon { width: 20px; height: 20px; }

.mega-link__title {
  font-size: var(--fs-body-sm);
  font-weight: var(--fw-semibold);
  color: var(--c-text);
}

.mega-link__desc {
  font-size: var(--fs-caption);
  color: var(--c-text-muted);
  line-height: 1.4;
  margin-top: 2px;
}

.mega__featured {
  background: linear-gradient(160deg, var(--c-graphite-900), var(--c-ink));
  border-radius: var(--r-lg);
  padding: var(--s-5);
  color: var(--c-white);
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
  position: relative;
  overflow: hidden;
}

.mega__featured::before {
  content: '';
  position: absolute;
  top: -40px; right: -40px;
  width: 140px; height: 140px;
  background: radial-gradient(circle, hsl(48 100% 50% / 0.45), transparent 70%);
  pointer-events: none;
}

.mega__featured-title {
  font-size: var(--fs-h4);
  font-weight: var(--fw-bold);
  letter-spacing: -0.01em;
}

.mega__featured-desc {
  font-size: var(--fs-body-sm);
  color: var(--c-graphite-400);
  line-height: 1.5;
}

/* --------------------------------------------------------------------------
   Mobile menu (drawer / fullscreen)
   -------------------------------------------------------------------------- */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  background: var(--c-ink);
  color: var(--c-white);
  display: flex;
  flex-direction: column;
  padding: var(--s-5);
  transform: translateX(100%);
  transition: transform var(--dur-slow) var(--ease-out-quart);
  overflow-y: auto;
}

.mobile-menu[aria-hidden="false"] {
  transform: translateX(0);
}

.mobile-menu__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: var(--s-6);
  border-bottom: 1px solid var(--c-graphite-700);
}

.mobile-menu__list {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--s-1);
  padding-top: var(--s-6);
}

.mobile-menu__link {
  padding: var(--s-4) 0;
  font-size: 1.5rem;
  font-weight: var(--fw-semibold);
  letter-spacing: -0.02em;
  color: var(--c-white);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--c-graphite-800);
}

.mobile-menu__link .icon {
  color: var(--c-graphite-500);
  width: 18px;
  height: 18px;
  transition: transform var(--dur-fast);
}

.mobile-menu__sub {
  padding-left: var(--s-3);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  max-height: 0;
  transition: max-height var(--dur-base) var(--ease-out-quart);
}

.mobile-menu__item--open .mobile-menu__sub {
  max-height: 400px;
}

.mobile-menu__item--open .mobile-menu__link .icon {
  transform: rotate(180deg);
  color: var(--c-amber-500);
}

.mobile-menu__sub-link {
  padding: var(--s-3) 0;
  font-size: var(--fs-body-lg);
  color: var(--c-graphite-400);
  border-bottom: 1px solid var(--c-graphite-800);
}

.mobile-menu__sub-link:last-child { border: 0; }

.mobile-menu__contacts {
  margin-top: var(--s-8);
  padding-top: var(--s-6);
  border-top: 1px solid var(--c-graphite-700);
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
}

.mobile-menu__contacts .btn { justify-content: flex-start; }

/* --------------------------------------------------------------------------
   Sticky CTA (mobile only)
   -------------------------------------------------------------------------- */
.sticky-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  padding: var(--s-3);
  background: rgba(20, 20, 22, 0.86);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-top: 1px solid var(--c-graphite-700);
  display: grid;
  grid-template-columns: 1fr 1fr 1.4fr;
  gap: var(--s-2);
  transform: translateY(110%);
  transition: transform var(--dur-base) var(--ease-out-quart);
}

.sticky-cta.is-visible { transform: translateY(0); }

.sticky-cta__btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 12px 6px;
  border-radius: var(--r-md);
  font-size: var(--fs-caption);
  font-weight: var(--fw-semibold);
  white-space: nowrap;
  text-align: center;
}

.sticky-cta__btn--phone {
  background: var(--c-graphite-800);
  color: var(--c-white);
}

.sticky-cta__btn--wa {
  background: #25D366;
  color: var(--c-white);
}

.sticky-cta__btn--cta {
  background: var(--c-amber-500);
  color: var(--c-ink);
}

.sticky-cta__btn .icon { width: 16px; height: 16px; }

@media (min-width: 1024px) {
  .sticky-cta { display: none !important; }
}

/* Body padding-top for fixed header */
body { padding-top: 0; }
.has-header-offset { padding-top: var(--header-h); }

/* Padding-bottom for sticky CTA на мобильном */
@media (max-width: 1023px) {
  body { padding-bottom: 80px; }
}