.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  min-height: var(--header-height);
  background: var(--header-bg);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  width: min(calc(100% - 40px), var(--content-width));
  min-height: var(--header-height);
  margin: 0 auto;
}

.site-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 116px;
  text-decoration: none;
}

.site-logo img {
  width: 54px;
  height: 54px;
  border-radius: 50%;
}

.brand-name {
  color: var(--olive-dark);
  font-size: 1.2rem;
  font-weight: 700;
}

.desktop-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 22px;
}

.desktop-nav a {
  position: relative;
  color: var(--muted);
  font-size: 0.94rem;
  font-weight: 700;
  text-decoration: none;
}

.desktop-nav a:hover,
.desktop-nav a[aria-current="page"] {
  color: var(--olive-dark);
}

.desktop-nav a[aria-current="page"]::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -9px;
  left: 0;
  height: 2px;
  background: var(--gold);
}

.header-contact {
  padding: 10px 16px;
  background: var(--olive-dark);
  border-radius: 999px;
  color: var(--on-strong);
  font-weight: 700;
  text-decoration: none;
}

.menu-button {
  display: none;
  place-items: center;
  width: 42px;
  height: 42px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--olive-dark);
  cursor: pointer;
}

.menu-button__icon {
  position: relative;
  display: block;
  width: 20px;
  height: 14px;
}

.menu-button__icon::before,
.menu-button__icon::after,
.menu-button__icon span {
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  background: currentColor;
  border-radius: 999px;
  content: "";
  transition: top var(--transition), transform var(--transition), opacity var(--transition);
}

.menu-button__icon::before {
  top: 0;
}

.menu-button__icon span {
  top: 6px;
}

.menu-button__icon::after {
  top: 12px;
}

.menu-button[aria-expanded="true"] .menu-button__icon::before {
  top: 6px;
  transform: rotate(45deg);
}

.menu-button[aria-expanded="true"] .menu-button__icon span {
  opacity: 0;
}

.menu-button[aria-expanded="true"] .menu-button__icon::after {
  top: 6px;
  transform: rotate(-45deg);
}

.mobile-nav {
  display: none;
}

.mobile-nav-backdrop {
  display: none;
}

@media (max-width: 940px) {
  .desktop-nav,
  .header-contact {
    display: none;
  }

  .menu-button {
    display: inline-grid;
  }

  .mobile-nav {
    display: grid;
    position: fixed;
    z-index: 2;
    inset: var(--header-height) 0 auto 0;
    gap: 4px;
    padding: 20px;
    background: var(--surface);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow);
    transform: translateY(-130%);
    transition: transform 180ms ease;
  }

  .mobile-nav-backdrop {
    display: block;
    position: fixed;
    z-index: 1;
    inset: var(--header-height) 0 0;
    background: rgb(8 11 8 / 52%);
    opacity: 0;
    pointer-events: none;
    transition: opacity 180ms ease;
  }

  .mobile-nav-backdrop.is-open {
    opacity: 1;
    pointer-events: auto;
    touch-action: none;
  }

  .mobile-nav.is-open {
    transform: translateY(0);
  }

  .mobile-nav a {
    padding: 13px 12px;
    border-radius: 10px;
    color: var(--olive-dark);
    font-weight: 700;
    text-decoration: none;
  }

  .mobile-nav a:hover,
  .mobile-nav a[aria-current="page"] {
    background: var(--bg-soft);
  }
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.theme-toggle {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  padding: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--olive-dark);
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}

.theme-toggle:hover {
  background: var(--bg-soft);
  transform: translateY(-1px);
}

.theme-toggle svg {
  width: 19px;
  height: 19px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.theme-toggle__moon,
:root[data-theme="dark"] .theme-toggle__sun {
  display: none;
}

:root[data-theme="dark"] .theme-toggle__moon {
  display: block;
}

@media (max-width: 940px) {
  .header-actions .header-contact {
    display: none;
  }
}


@media (max-width: 480px) {
  .header-inner {
    gap: 10px;
    width: min(calc(100% - 24px), var(--content-width));
  }

  .site-logo {
    gap: 8px;
    min-width: 0;
  }

  .site-logo img {
    width: 46px;
    height: 46px;
  }

  .brand-name {
    font-size: 1.08rem;
  }

  .header-actions {
    gap: 8px;
  }

  .theme-toggle,
  .menu-button {
    width: 40px;
    height: 40px;
    flex: 0 0 40px;
  }
}