/* =========================================================
   SOUTH YORKSHIRE XCAVATE — HEADER / NAVIGATION
   ========================================================= */

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  width: 100%;
  background: rgba(255,255,255,.98);
  border-bottom: 1px solid rgba(17,20,22,.08);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: box-shadow var(--transition), background var(--transition);
}

.site-header.is-scrolled {
  background: rgba(255,255,255,.995);
  box-shadow: 0 12px 34px rgba(9,20,13,.09);
}

/* Utility bar */
.header-utility {
  background: var(--color-primary-deep);
  color: rgba(255,255,255,.78);
  font-size: 12px;
  font-weight: 650;
}

.header-utility-inner {
  min-height: 34px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.header-utility-contact {
  display: flex;
  align-items: center;
  gap: 14px;
  white-space: nowrap;
}

.header-utility-phone-label {
  color: rgba(255,255,255,.7);
  font-weight: 600;
}

.header-utility a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #fff;
  font-weight: 700;
  transition: color var(--transition);
}

.header-utility a:hover,
.header-utility a:focus-visible { color: var(--color-accent); }

.header-utility svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
  flex: 0 0 auto;
}

/* Main row */
.header-inner {
  min-height: 92px;
  display: flex;
  align-items: center;
  gap: 28px;
}

.site-logo {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
}

.site-logo img {
  width: auto;
  height: 66px;
  max-width: 228px;
  object-fit: contain;
}

.main-nav {
  display: flex;
  align-items: center;
  margin-left: auto;
}

.main-nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.main-nav-list > li > a,
.nav-parent-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 46px;
  padding: 10px 12px;
  border-radius: 10px;
  color: #27312b;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: -.012em;
  transition: color var(--transition), background var(--transition);
}

.main-nav-list > li > a:hover,
.main-nav-list > li > a:focus-visible,
.main-nav-list > li > a.is-active,
.nav-item--dropdown:hover > .nav-item-row .nav-parent-link,
.nav-item--dropdown:focus-within > .nav-item-row .nav-parent-link,
.nav-item--dropdown.is-active > .nav-item-row .nav-parent-link {
  color: var(--color-primary);
  background: #f0f6f2;
}

.nav-item { position: relative; }
.nav-item-row { display: flex; align-items: center; }

.submenu-toggle {
  width: 28px;
  height: 38px;
  margin-left: -7px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  background: transparent;
  color: #667069;
  cursor: pointer;
}

.submenu-toggle svg {
  width: 15px;
  height: 15px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform var(--transition);
}

.nav-item--dropdown:hover .submenu-toggle,
.nav-item--dropdown:focus-within .submenu-toggle { color: var(--color-primary); }

/* Desktop dropdowns */
.nav-dropdown {
  position: absolute;
  top: calc(100% + 14px);
  left: 50%;
  width: min(760px, calc(100vw - 48px));
  padding: 18px;
  border: 1px solid rgba(17,20,22,.08);
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 24px 70px rgba(8,23,14,.16);
  opacity: 0;
  visibility: hidden;
  transform: translate(-50%, 10px);
  pointer-events: none;
  transition: opacity 160ms ease, transform 160ms ease, visibility 160ms ease;
}

.nav-dropdown::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: -15px;
  height: 15px;
}

.nav-item--areas .nav-dropdown {
  left: auto;
  right: -120px;
  width: min(850px, calc(100vw - 48px));
  transform: translateY(10px);
}

.nav-item--dropdown:hover > .nav-dropdown,
.nav-item--dropdown:focus-within > .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0);
  pointer-events: auto;
}

.nav-item--areas:hover > .nav-dropdown,
.nav-item--areas:focus-within > .nav-dropdown { transform: translateY(0); }

.nav-dropdown--services {
  display: grid;
  grid-template-columns: .8fr 1.55fr;
  gap: 18px;
}

.dropdown-intro {
  padding: 20px;
  border-radius: 14px;
  background: linear-gradient(145deg, var(--color-primary-deep), var(--color-primary));
  color: #fff;
}

.dropdown-kicker {
  display: block;
  margin-bottom: 7px;
  color: var(--color-accent);
  font-size: 11px;
  font-weight: 900;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.dropdown-intro strong,
.dropdown-area-head strong {
  display: block;
  color: inherit;
  font-size: 18px;
  line-height: 1.25;
  letter-spacing: -.025em;
}

.dropdown-intro p {
  margin: 10px 0 16px;
  color: rgba(255,255,255,.76);
  font-size: 13px;
  line-height: 1.55;
}

.dropdown-intro > a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #fff;
  font-size: 13px;
  font-weight: 850;
}

.dropdown-links {
  display: grid;
  align-content: start;
  gap: 5px;
}

.dropdown-links--two-col { grid-template-columns: repeat(2, minmax(0,1fr)); }

.dropdown-links > a {
  min-height: 48px;
  padding: 10px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  border-radius: 10px;
  color: #27312b;
  font-size: 13px;
  font-weight: 750;
  transition: background var(--transition), color var(--transition), transform var(--transition);
}

.dropdown-links > a:hover,
.dropdown-links > a:focus-visible {
  background: #f1f7f3;
  color: var(--color-primary);
  transform: translateX(2px);
}

.dropdown-links svg {
  width: 15px;
  height: 15px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.nav-dropdown--areas { padding: 20px; }

.dropdown-area-head {
  padding: 0 2px 15px;
  margin-bottom: 14px;
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  border-bottom: 1px solid var(--color-line);
}

.dropdown-area-head strong { color: var(--color-ink); }

.dropdown-area-head > a {
  color: var(--color-primary);
  font-size: 13px;
  font-weight: 850;
  white-space: nowrap;
}

.area-menu-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0,1fr));
  gap: 18px;
}

.area-menu-column {
  display: grid;
  align-content: start;
  gap: 5px;
}

.area-menu-column a {
  padding: 5px 7px;
  border-radius: 7px;
  color: var(--color-muted);
  font-size: 12.5px;
  font-weight: 650;
  transition: color var(--transition), background var(--transition);
}

.area-menu-column a:hover,
.area-menu-column a:focus-visible {
  color: var(--color-primary);
  background: #f1f7f3;
}

.area-menu-column .area-menu-title {
  margin-bottom: 3px;
  color: var(--color-ink);
  font-size: 14px;
  font-weight: 900;
}

/* Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

.header-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 19px;
  border-radius: 10px;
  background: var(--color-primary);
  color: #fff;
  font-size: 14px;
  font-weight: 850;
  box-shadow: 0 8px 22px rgba(11,107,55,.2);
  transition: transform var(--transition), background var(--transition), box-shadow var(--transition);
}

.header-cta:hover,
.header-cta:focus-visible {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 12px 28px rgba(11,107,55,.26);
}

.nav-toggle {
  display: none;
  width: 46px;
  height: 46px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-line);
  border-radius: 11px;
  background: #fff;
  cursor: pointer;
}

.nav-toggle-lines,
.nav-toggle-lines::before,
.nav-toggle-lines::after {
  width: 20px;
  height: 2px;
  display: block;
  background: var(--color-ink);
  border-radius: 999px;
}

.nav-toggle-lines { position: relative; }
.nav-toggle-lines::before,
.nav-toggle-lines::after { content:""; position:absolute; left:0; }
.nav-toggle-lines::before { top:-6px; }
.nav-toggle-lines::after { top:6px; }

.mobile-nav-head,
.mobile-nav-footer,
.nav-backdrop,
.mobile-nav-close { display: none; }

/* =========================================================
   TABLET / MOBILE DRAWER
   ========================================================= */
@media (max-width: 1100px) {
  /* Disable backdrop-filter on mobile so fixed drawer/backdrop use the viewport, not the sticky header as a containing block. */
  .site-header,
  .site-header.is-scrolled {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }

  .header-utility { display: none; }

  .header-inner {
    min-height: 78px;
    justify-content: space-between;
  }

  .site-logo img {
    height: 54px;
    max-width: 205px;
  }

  .nav-toggle { display: inline-flex; }

  .main-nav {
    position: fixed;
    z-index: 1003;
    top: 0;
    right: 0;
    bottom: auto;
    left: auto;
    width: min(410px, 92vw);
    height: 100dvh;
    min-height: 100vh;
    max-height: 100dvh;
    max-width: 100vw;
    margin: 0;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    background: #fff;
    box-shadow: -24px 0 70px rgba(4,25,13,.18);
    transform: translate3d(104%,0,0);
    visibility: hidden;
    pointer-events: none;
    transition: transform 280ms cubic-bezier(.2,.8,.2,1), visibility 280ms ease;
    overflow: hidden;
  }

  .main-nav.is-open {
    transform: translate3d(0,0,0);
    visibility: visible;
    pointer-events: auto;
  }

  .nav-backdrop {
    position: fixed;
    z-index: 1002;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    width: 100vw;
    height: 100dvh;
    border: 0;
    padding: 0;
    background: rgba(3,14,8,.6);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 240ms ease, visibility 240ms ease;
  }

  .nav-backdrop.is-visible {
    display: block;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  .mobile-nav-head {
    min-height: 88px;
    padding: 14px 18px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    border-bottom: 1px solid var(--color-line);
    background: #fff;
  }

  .mobile-nav-logo { display: inline-flex; align-items: center; }
  .mobile-nav-logo img { width:auto; height:55px; max-width:185px; }

  .mobile-nav-close {
    width: 44px;
    height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
    border: 1px solid var(--color-line);
    border-radius: 12px;
    background: #fff;
    cursor: pointer;
  }

  .mobile-nav-close span,
  .mobile-nav-close span::before {
    width: 20px;
    height: 2px;
    display: block;
    background: var(--color-ink);
    border-radius: 999px;
  }

  .mobile-nav-close span { transform: rotate(45deg); }
  .mobile-nav-close span::before { content:""; transform: rotate(90deg); }

  .main-nav-list {
    flex: 1 1 auto;
    min-height: 0;
    margin: 0;
    padding: 12px 14px 22px;
    display: block;
    overflow-y: auto;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
  }

  .main-nav-list > li { border-bottom: 1px solid #eef0ef; }

  .main-nav-list > li > a,
  .nav-parent-link {
    width: 100%;
    min-height: 56px;
    padding: 14px 10px;
    border-radius: 9px;
    font-size: 16px;
    font-weight: 850;
  }

  .main-nav-list > li > a.is-active,
  .nav-item--dropdown.is-active > .nav-item-row .nav-parent-link {
    color: var(--color-primary);
    background: transparent;
  }

  .nav-item-row { width:100%; }
  .nav-item-row .nav-parent-link { flex:1 1 auto; }

  .submenu-toggle {
    width: 46px;
    height: 46px;
    margin: 0;
    border-radius: 10px;
    background: #f2f6f3;
    color: var(--color-primary);
  }

  .submenu-toggle[aria-expanded="true"] svg { transform: rotate(180deg); }

  .nav-dropdown,
  .nav-item--areas .nav-dropdown {
    position: static;
    width: auto;
    max-height: 0;
    padding: 0;
    border: 0;
    border-radius: 0;
    box-shadow: none;
    background: transparent;
    opacity: 1;
    visibility: visible;
    transform: none;
    pointer-events: auto;
    overflow: hidden;
    transition: max-height 320ms ease, padding 320ms ease;
  }

  .nav-dropdown::before { display:none; }

  .nav-item--dropdown:hover > .nav-dropdown,
  .nav-item--dropdown:focus-within > .nav-dropdown,
  .nav-item--areas:hover > .nav-dropdown,
  .nav-item--areas:focus-within > .nav-dropdown { transform:none; }

  .nav-item--dropdown.is-submenu-open > .nav-dropdown {
    max-height: 1500px;
    padding: 2px 0 14px;
  }

  .nav-dropdown--services { display:block; }

  .dropdown-intro {
    margin: 0 4px 8px;
    padding: 16px;
  }

  .dropdown-intro strong { font-size:16px; }
  .dropdown-intro p { margin-bottom:12px; }

  .dropdown-links--two-col { grid-template-columns:1fr; }
  .dropdown-links { gap:2px; padding:0 3px; }

  .dropdown-links > a {
    min-height: 44px;
    padding: 9px 12px;
    background: #f8faf9;
  }

  .dropdown-area-head {
    margin: 0 4px 8px;
    padding: 12px 12px 14px;
    align-items: start;
  }

  .dropdown-area-head strong { font-size:16px; }

  .area-menu-grid {
    grid-template-columns:1fr 1fr;
    gap:10px;
    padding:0 4px;
  }

  .area-menu-column {
    padding:10px;
    border-radius:11px;
    background:#f7f9f7;
  }

  .area-menu-column a { padding:5px 3px; }

  .mobile-nav-footer {
    padding: 14px 18px max(18px, env(safe-area-inset-bottom));
    display: grid;
    gap: 12px;
    border-top: 1px solid var(--color-line);
    background: #fbfcfb;
  }

  .mobile-nav-contact {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 10px 18px;
    align-items: start;
  }

  .mobile-nav-contact-link {
    display: grid;
    gap: 1px;
    color: var(--color-muted);
    font-size: 11px;
    font-weight: 750;
  }

  .mobile-nav-contact-link strong {
    color: var(--color-primary);
    font-size: 13px;
    overflow-wrap: anywhere;
  }

  .header-cta--mobile {
    width:100%;
    min-height:50px;
  }
}

@media (max-width: 640px) {
  .header-inner {
    min-height: 72px;
    gap: 14px;
  }

  .site-logo img {
    height: 48px;
    max-width: 168px;
  }

  .header-actions > .header-cta { display:none; }

  .nav-toggle {
    width:44px;
    height:44px;
  }

  .main-nav {
    width: 100vw;
    max-width: none;
  }

  .mobile-nav-head {
    min-height:78px;
    padding-inline:16px;
  }

  .mobile-nav-logo img {
    height:49px;
    max-width:166px;
  }

  .main-nav-list { padding-inline:12px; }
  .area-menu-grid { grid-template-columns:1fr; }

  .dropdown-area-head {
    display:grid;
    gap:8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .main-nav,
  .nav-backdrop,
  .nav-dropdown,
  .submenu-toggle svg { transition:none; }
}

@media (max-width: 420px) {
  .mobile-nav-contact {
    grid-template-columns: 1fr;
  }
}