/* ===========================
   HEADER ROOT
   =========================== */

.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.6);
}

/* Скрытие хедера на скролле */
.header[data-scroll="down"] {
  transform: translateY(-100%);
  transition: transform var(--transition-slow);
}

.header[data-scroll="up"] {
  transform: translateY(0);
  transition: transform var(--transition-slow);
}

/* prefers-reduced-motion → отключаем анимацию */
@media (prefers-reduced-motion: reduce) {
  .header {
    transition: none;
  }
}

/* Хедер с тенью */
.header[data-elevated="true"] {
  box-shadow: 0 6px 20px rgba(15, 23, 42, 0.18);
  background: rgba(255, 255, 255, 0.9);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 14px;
  gap: 16px;
}

/* ЛОГО */
.header__logo-image {
  height: 36px;
  width: auto;
  display: block;
}

/* NAV DESKTOP */
.header__nav {
  display: none;
}

@media (min-width: 900px) {
  .header__nav {
    display: block;
  }
}

.header__menu {
  display: flex;
  align-items: center;
  gap: 28px;
}

.header__link {
  font-size: var(--font-size-md);
  color: var(--color-text-main);
  text-decoration: none;
  padding: 6px 4px;
  transition: color var(--transition-fast);
}

.header__link:hover,
.header__link:focus-visible {
  color: var(--color-primary);
  outline: none;
}

/* CTA */
.header__cta {
  display: none;
}

@media (min-width: 900px) {
  .header__cta {
    display: inline-flex;
    padding: 10px 18px;
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: 999px;
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-decoration: none;
    transition: transform var(--transition-fast),
      background-color var(--transition-fast);
  }

  .header__cta:hover {
    background: var(--color-primary-strong);
    transform: translateY(-2px);
  }

  .header__cta:focus-visible {
    outline: 2px solid var(--color-focus);
    outline-offset: 2px;
  }
}

/* ===========================
   BURGER
   =========================== */

.header__burger {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  border: none;
  background: rgba(255, 255, 255, 0.6);
  display: grid;
  place-items: center;
  cursor: pointer;
  padding: 0;
  position: relative;
  z-index: 60;
}

@media (min-width: 900px) {
  .header__burger {
    display: none;
  }
}

.header__burger-line {
  width: 22px;
  height: 2px;
  background: var(--color-text-main);
  border-radius: 2px;
  transition: transform 200ms ease, opacity 200ms ease;
  position: absolute;
}

.header__burger-line--top {
  transform: translateY(-7px);
}

.header__burger-line--middle {
  transform: translateY(0);
}

.header__burger-line--bottom {
  transform: translateY(7px);
}

/* АНИМАЦИЯ БУРГЕРА */
.header[data-state="open"] .header__burger-line--top {
  transform: rotate(45deg);
}
.header[data-state="open"] .header__burger-line--middle {
  opacity: 0;
}
.header[data-state="open"] .header__burger-line--bottom {
  transform: rotate(-45deg);
}

/* ===========================
   MOBILE MENU PANEL
   =========================== */

.mobile-menu {
  position: fixed;
  inset: 0;
  display: flex;
  justify-content: stretch;
  overflow: hidden;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 220ms ease-out, visibility 0s linear 220ms;
}

/* открытое состояние */
body.is-menu-open .mobile-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transition: opacity 220ms ease-out;
}

.mobile-menu[aria-hidden="true"] {
  visibility: hidden;
}

.mobile-menu__backdrop {
  display: none;
}

.mobile-menu__panel {
  position: relative;
  width: 100%;
  max-width: 100%;
  height: 100%;
  box-sizing: border-box;
  background: var(--color-white);
  box-shadow: none;
  padding: 24px 20px;
  padding-bottom: calc(24px + env(safe-area-inset-bottom));
  display: flex;
  flex-direction: column;
  gap: 24px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  transform: translateX(100%);
  opacity: 0;
  transition: transform 400ms cubic-bezier(0.16, 1, 0.3, 1),
    opacity 300ms ease-out;
  will-change: transform;
}

.mobile-menu__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.mobile-menu__title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.mobile-menu__close {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  border: 1px solid rgba(148, 163, 184, 0.6);
  background: rgba(241, 245, 249, 0.8);
  color: var(--color-text-main);
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: transform var(--transition-fast),
    background-color var(--transition-fast),
    border-color var(--transition-fast);
}

.mobile-menu__close:hover {
  transform: translateY(-1px);
  background: rgba(226, 232, 240, 0.9);
  border-color: rgba(148, 163, 184, 0.9);
}

.mobile-menu__close:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

body.is-menu-open .mobile-menu__panel {
  transform: translateX(0);
  opacity: 1;
}

.mobile-menu__list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.mobile-menu__link {
  font-size: 1.125rem;
  text-decoration: none;
  color: var(--color-text-main);
  padding-block: 4px;
  transition: color var(--transition-fast);
}

.mobile-menu__link:hover,
.mobile-menu__link:focus-visible {
  color: var(--color-primary);
  outline: none;
}

/* CTA в мобайле */
.mobile-menu__cta {
  margin-top: auto;
  display: inline-flex;
  padding: 12px 20px;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  font-size: var(--font-size-md);
  text-align: center;
  justify-content: center;
  width: 100%;
  transition: background-color var(--transition-fast),
    transform var(--transition-fast);
}

.mobile-menu__cta:hover {
  background: var(--color-primary-strong);
  transform: translateY(-2px);
}

.mobile-menu__cta:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

/* Состояние перед открытием */
.mobile-menu__link {
  opacity: 0;
  transform: translateX(12px);
  transition: opacity 250ms ease, transform 250ms ease;
}

/* Stagger при открытии */
body.is-menu-open .mobile-menu__link {
  opacity: 1;
  transform: translateX(0);
}

body.is-menu-open .mobile-menu__link:nth-child(1) {
  transition-delay: 80ms;
}
body.is-menu-open .mobile-menu__link:nth-child(2) {
  transition-delay: 140ms;
}
body.is-menu-open .mobile-menu__link:nth-child(3) {
  transition-delay: 200ms;
}

@media (min-width: 900px) {
  .mobile-menu {
    display: none;
  }
}

body.is-menu-open {
  overflow: hidden;
}