.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid rgba(215, 236, 231, 0.9);
  backdrop-filter: blur(18px);
}

.header-inner {
  min-height: 88px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand img {
  width: 270px;
  height: auto;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.main-nav a,
.nav-submenu-toggle {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 10px 15px;
  border: 0;
  border-radius: 999px;
  color: var(--text);
  background: transparent;
  font-family: inherit;
  font-size: 0.94rem;
  font-weight: 900;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition: 0.2s ease;
}

.main-nav a:hover,
.main-nav a.active,
.nav-item.active > .nav-submenu-toggle,
.nav-submenu-toggle:hover {
  color: var(--green-dark);
  background: var(--mint);
}

.nav-submenu-toggle i {
  font-size: 0.72rem;
  transition: transform 0.2s ease;
}

.nav-item {
  position: relative;
}

.nav-submenu {
  position: absolute;
  top: calc(100% + 10px);
  left: 0;
  z-index: 1200;
  min-width: 245px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 18px 45px rgba(11, 44, 42, 0.12);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: 0.2s ease;
}

.nav-submenu a {
  display: flex;
  width: 100%;
  padding: 12px 13px;
  border-radius: 12px;
  font-size: 0.9rem;
}

.nav-item:hover .nav-submenu,
.nav-item:focus-within .nav-submenu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-item:hover .nav-submenu-toggle i,
.nav-item:focus-within .nav-submenu-toggle i {
  transform: rotate(180deg);
}

.main-nav .nav-cta {
  color: var(--white);
  background: var(--green-dark);
}

.main-nav .nav-cta:hover,
.main-nav .nav-cta.active {
  color: var(--white);
  background: var(--green-deep);
}

.nav-toggle,
.nav-close {
  display: none;
  border: 0;
  background: none;
  cursor: pointer;
}

.nav-toggle {
  width: 48px;
  height: 48px;
  border-radius: 17px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  background: var(--mint);
}

.nav-toggle span {
  width: 23px;
  height: 2px;
  border-radius: 99px;
  background: var(--green-dark);
}

.nav-close {
  align-self: flex-end;
  width: 46px;
  height: 46px;
  justify-content: center;
  align-items: center;
  color: var(--text);
  font-size: 2rem;
}

.nav-overlay {
  position: fixed;
  inset: 0;
  z-index: 900;
  opacity: 0;
  visibility: hidden;
  background: rgba(11, 44, 42, 0.48);
  transition: 0.25s ease;
}

body.nav-open .nav-overlay {
  opacity: 1;
  visibility: visible;
}

/* =========================
   MOBILE NAV / SUBMENU
========================= */
@media (max-width: 1060px) {
  .nav-item {
    width: 100%;
  }

  .nav-submenu-toggle {
    width: 100%;
    justify-content: space-between;
    padding: 16px;
    font-size: 1.05rem;
  }

  .nav-submenu {
    position: static;
    min-width: 0;
    width: 100%;
    max-height: 0;
    margin-top: 0;
    padding: 0 8px;
    overflow: hidden;
    border: 0;
    border-radius: 16px;
    box-shadow: none;
    background: var(--mint-soft);
    opacity: 1;
    visibility: visible;
    transform: none;
    transition: max-height 0.25s ease, padding 0.25s ease, margin-top 0.25s ease;
  }

  .nav-item.submenu-open .nav-submenu {
    max-height: 520px;
    margin-top: 6px;
    padding: 8px;
  }

  .nav-submenu a {
    padding: 14px 16px;
    font-size: 0.98rem;
    background: var(--white);
  }

  .nav-item:hover .nav-submenu,
  .nav-item:focus-within .nav-submenu {
    transform: none;
  }

  .nav-item:hover .nav-submenu-toggle i,
  .nav-item:focus-within .nav-submenu-toggle i {
    transform: none;
  }

  .nav-item.submenu-open .nav-submenu-toggle i {
    transform: rotate(180deg);
  }
}