/* ==========================================================================
   header.css — sticky-хедер, логотип, навігація, мобільне меню
   ========================================================================== */

.header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: rgba(246, 244, 239, 0.82);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: background-color 0.35s var(--ease), border-color 0.35s var(--ease),
              box-shadow 0.35s var(--ease);
}

.header.is-scrolled {
  background: rgba(246, 244, 239, 0.95);
  border-bottom-color: var(--line);
  box-shadow: 0 1px 20px -8px rgba(7, 27, 45, 0.2);
}

.header__inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  width: 100%;
}

/* --- Логотип -------------------------------------------------------------- */

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  flex: none;
  color: var(--navy);
}

.logo__mark {
  width: 38px;
  height: 38px;
  flex: none;
  color: var(--gold);
}

.logo__text {
  display: grid;
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.02;
  letter-spacing: 0.01em;
  font-size: 0.9375rem;
}

.logo__text span:first-child { color: var(--navy); }
.logo__text span:last-child { color: var(--gold-600); }

@media (max-width: 400px) {
  .logo__text { font-size: 0.8125rem; }
  .logo__mark { width: 32px; height: 32px; }
}

/* --- Навігація (desktop) -------------------------------------------------- */

.nav { margin-left: auto; }

.nav__list {
  display: flex;
  align-items: center;
  gap: clamp(0.5rem, -0.5rem + 1.9vw, 1.75rem);
}

.nav__link {
  position: relative;
  display: block;
  padding: 0.5rem 0.25rem;
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--navy);
  white-space: nowrap;
  transition: color 0.25s var(--ease);
}

.nav__link::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease);
}

.nav__link:hover { color: var(--gold-600); }
.nav__link:hover::after,
.nav__link.is-active::after { transform: scaleX(1); }
.nav__link.is-active { color: var(--gold-600); }

.header__cta { flex: none; margin-left: 0.5rem; }

/*
  Desktop-навігація вмикається з 1140 px — на меншій ширині п'ять пунктів
  разом із CTA-кнопкою вже не вміщаються в рядок, тож показуємо гамбургер.
*/
@media (max-width: 1139px) {
  .nav,
  .header__cta { display: none; }
}

/* На вузькому desktop трохи стискаємо CTA, щоб рядок не був упритул */
@media (min-width: 1140px) and (max-width: 1319px) {
  .header__cta { padding-inline: 1.1rem; font-size: 0.75rem; }
  .nav__link { font-size: 0.75rem; }
}

/* --- Кнопка-гамбургер ----------------------------------------------------- */

.burger {
  display: none;
  margin-left: auto;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(7, 27, 45, 0.16);
  border-radius: var(--radius);
  transition: border-color 0.25s var(--ease), background-color 0.25s var(--ease);
}

.burger:hover { border-color: var(--gold); background: rgba(201, 162, 58, 0.1); }

@media (max-width: 1139px) {
  .burger { display: inline-flex; }
}

.burger__box {
  position: relative;
  width: 20px;
  height: 14px;
}

.burger__box span {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--navy);
  transition: transform 0.32s var(--ease), opacity 0.2s var(--ease);
}

.burger__box span:nth-child(1) { top: 0; }
.burger__box span:nth-child(2) { top: 6px; }
.burger__box span:nth-child(3) { top: 12px; }

.burger[aria-expanded='true'] .burger__box span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.burger[aria-expanded='true'] .burger__box span:nth-child(2) { opacity: 0; }
.burger[aria-expanded='true'] .burger__box span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* --- Мобільне меню -------------------------------------------------------- */

.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 99;
  display: flex;
  flex-direction: column;
  padding: calc(var(--header-h) + 1.5rem) var(--gutter) 2rem;
  background: var(--navy);
  color: var(--white);
  overflow-y: auto;
  overscroll-behavior: contain;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity 0.32s var(--ease), transform 0.32s var(--ease),
              visibility 0.32s;
}

.mobile-menu.is-open {
  opacity: 1;
  visibility: visible;
  transform: none;
}

@media (min-width: 1140px) {
  .mobile-menu { display: none; }
}

.mobile-menu__list {
  display: grid;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.mobile-menu__link {
  display: flex;
  align-items: baseline;
  gap: 0.9rem;
  padding: 1.05rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  transition: color 0.25s var(--ease), transform 0.25s var(--ease);
}

.mobile-menu__link:hover,
.mobile-menu__link:focus-visible { color: var(--gold); transform: translateX(0.5rem); }

.mobile-menu__num {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}

.mobile-menu__foot {
  margin-top: auto;
  padding-top: 2rem;
  display: grid;
  gap: 1rem;
}

.mobile-menu__tel {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--white);
}

.mobile-menu__tel:hover { color: var(--gold); }

.mobile-menu__meta {
  font-size: var(--fs-sm);
  color: var(--text-on-navy);
}

body.is-locked { overflow: hidden; }

/* Поки відкрите мобільне меню, хедер стає темно-синім заодно з ним */
body.is-locked .header {
  background: var(--navy);
  border-bottom-color: rgba(255, 255, 255, 0.12);
  box-shadow: none;
}

body.is-locked .logo,
body.is-locked .logo__text span:first-child { color: var(--white); }
body.is-locked .logo__text span:last-child { color: var(--gold); }
body.is-locked .logo__mark { color: var(--gold); }

body.is-locked .burger { border-color: rgba(255, 255, 255, 0.28); }
body.is-locked .burger:hover { background: rgba(255, 255, 255, 0.08); }
body.is-locked .burger__box span { background: var(--white); }