/* ==========================================================================
   ARBUDA ENGINEERING — Header & Executive Navigation System
   Designed from scratch: Glassmorphism, Micro-interactions, Responsive Drawer
   ========================================================================== */

/* --------------------------------------------------------------------------
   Header Root Architecture
   - Fixed top positioning with smart hide/show scroll dynamics
   - Dynamic states: transparent (hero), header--white (scrolled frosted glass),
     header--inverted (high contrast over dark media), header--hidden (scroll-down hide)
   -------------------------------------------------------------------------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-h-mobile);
  color: var(--color-text);
  background-color: transparent;
  transform: translateY(0);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1),
    background-color 0.35s cubic-bezier(0.16, 1, 0.3, 1),
    border-color 0.35s ease,
    box-shadow 0.35s ease,
    color 0.35s ease;
  will-change: transform;
}

/* Smart hide when scrolling down */
.header.header--hidden {
  transform: translateY(-105%);
}

/* While mobile drawer menu is active, lock header in view above drawer */
body.menu-open .header,
.header:has(.burger-btn--open) {
  transform: translateY(0) !important;
  z-index: 1100 !important;
}

/* Scrolled / Non-hero state: Frosted glass acrylic background */
.header.header--white {
  background-color: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  box-shadow: 0 4px 24px -2px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
}

/* Inverted contrast (over dark hero imagery) */
.header.header--inverted {
  color: #ffffff;
}

.header.header--inverted.header--white {
  color: var(--color-text);
}

@media (min-width: 1200px) {
  .header {
    height: var(--header-h-desktop);
  }
}

/* Header Container */
.header .container {
  height: 100%;
}

.header__content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 2.4rem;
}

/* --------------------------------------------------------------------------
   Brand Identity / Logo
   -------------------------------------------------------------------------- */
.header__logo {
  flex-shrink: 0;
  display: flex;
  align-items: center;
}

.header__logo a {
  display: flex;
  align-items: center;
  text-decoration: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.header__logo a:hover {
  opacity: 0.92;
  transform: scale(1.01);
}

.header__logo img {
  height: 3rem;
  width: auto;
  display: block;
  object-fit: contain;
  mix-blend-mode: multiply;
  transition: height 0.3s ease;
}

@media (min-width: 1200px) {
  .header__logo img {
    height: 3.4rem;
  }
}

/* When header is inverted over dark hero, adjust logo rendering */
.header.header--inverted:not(.header--white) .header__logo img {
  filter: brightness(0) invert(1);
  mix-blend-mode: screen;
}

/* --------------------------------------------------------------------------
   Desktop Navigation Architecture (>= 1200px)
   -------------------------------------------------------------------------- */
.header__nav {
  display: none;
  align-items: center;
  gap: 0.6rem;
  margin: 0 auto;
  padding: 0.4rem 0.6rem;
  background: rgba(255, 255, 255, 0.4);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(0, 0, 0, 0.05);
  border-radius: 9999px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.02);
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.header.header--inverted:not(.header--white) .header__nav {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.15);
}

.header.header--white .header__nav {
  background: rgba(0, 0, 0, 0.025);
  border-color: rgba(0, 0, 0, 0.05);
}

@media (min-width: 1200px) {
  .header__nav {
    display: flex;
  }
}

/* Nav Item Container */
.header__nav-item {
  position: relative;
}

/* Nav Trigger Links & Buttons */
.header__nav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.8rem 1.6rem;
  font-family: var(--font-primary);
  font-size: 1.45rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.4;
  color: inherit;
  text-decoration: none;
  background: transparent;
  border: none;
  border-radius: 9999px;
  cursor: pointer;
  transition: color 0.25s ease, background-color 0.25s ease, transform 0.2s ease;
  user-select: none;
  white-space: nowrap;
}

.header__nav-link:hover,
.header__nav-item--dropdown:hover>.header__nav-link,
.header__nav-item--dropdown.is-active>.header__nav-link {
  background-color: rgba(0, 0, 0, 0.05);
  color: var(--color-text);
}

.header.header--inverted:not(.header--white) .header__nav-link:hover,
.header.header--inverted:not(.header--white) .header__nav-item--dropdown:hover>.header__nav-link,
.header.header--inverted:not(.header--white) .header__nav-item--dropdown.is-active>.header__nav-link {
  background-color: rgba(255, 255, 255, 0.16);
  color: #ffffff;
}

/* Nav Arrow Animation */
.header__nav-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.2rem;
  height: 1.2rem;
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
  opacity: 0.7;
}

.header__nav-arrow svg {
  width: 100%;
  height: 100%;
}

.header__nav-item--dropdown:hover .header__nav-arrow,
.header__nav-item--dropdown.is-active .header__nav-arrow,
.header__nav-item--dropdown button[aria-expanded="true"] .header__nav-arrow {
  transform: rotate(180deg);
  opacity: 1;
}

/* --------------------------------------------------------------------------
   Desktop Floating Dropdown Mega Cards
   -------------------------------------------------------------------------- */
.nav-dropdown {
  position: absolute;
  top: calc(100% + 1.2rem);
  left: 50%;
  transform: translateX(-50%) translateY(10px) scale(0.97);
  min-width: 32rem;
  padding: 0.8rem;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(28px) saturate(190%);
  -webkit-backdrop-filter: blur(28px) saturate(190%);
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 1.8rem;
  box-shadow: 0 16px 40px -10px rgba(15, 23, 42, 0.12),
    0 2px 6px -1px rgba(15, 23, 42, 0.04),
    0 0 0 1px rgba(255, 255, 255, 0.8) inset;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.25s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.3s cubic-bezier(0.16, 1, 0.3, 1),
    visibility 0.25s ease;
  z-index: 1050;
}

/* Dropdown Bridge (prevents hover gap loss) */
.nav-dropdown::before {
  content: '';
  position: absolute;
  top: -1.2rem;
  left: 0;
  right: 0;
  height: 1.2rem;
}

/* Reveal Dropdown on Hover or Active */
.header__nav-item--dropdown:hover .nav-dropdown,
.header__nav-item--dropdown.is-active .nav-dropdown,
.header__nav-item--dropdown:focus-within .nav-dropdown {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0) scale(1);
}

.nav-dropdown__inner {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

/* Individual Dropdown Item */
.nav-dropdown__item {
  display: flex;
  align-items: flex-start;
  gap: 1.4rem;
  padding: 1.2rem 1.4rem;
  border-radius: 1.2rem;
  text-decoration: none;
  color: var(--color-text);
  background: transparent;
  transition: background-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.nav-dropdown__item:hover {
  background-color: rgba(21, 23, 23, 0.04);
  transform: translateX(4px);
}

/* Dropdown Icon Badge */
.nav-dropdown__icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 4rem;
  height: 4rem;
  border-radius: 1rem;
  background: #f8fafc;
  color: #1e293b;
  border: 1px solid rgba(0, 0, 0, 0.06);
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.03);
  transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1),
    background-color 0.2s ease,
    color 0.2s ease;
}

.nav-dropdown__icon svg {
  width: 2rem;
  height: 2rem;
}

.nav-dropdown__item:hover .nav-dropdown__icon {
  background: #111827;
  color: #ffffff;
  transform: scale(1.08) rotate(-2deg);
  border-color: #111827;
}

/* Dropdown Text Content */
.nav-dropdown__content {
  flex: 1 1;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.nav-dropdown__title {
  font-family: var(--font-primary);
  font-size: 1.45rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.3;
  color: #0f172a;
}

.nav-dropdown__desc {
  font-family: var(--font-primary);
  font-size: 1.2rem;
  font-weight: 400;
  line-height: 1.4;
  color: #64748b;
}

/* --------------------------------------------------------------------------
   Header Actions & "Request Consultation" CTA Button
   -------------------------------------------------------------------------- */
.header__actions {
  display: flex;
  align-items: center;
  gap: 1.4rem;
  flex-shrink: 0;
  position: relative;
  z-index: 1010;
}

/* Executive CTA Button */
.nav-cta-btn {
  display: none;
  align-items: center;
  gap: 0.8rem;
  padding: 1.1rem 2.2rem;
  background: #111827;
  color: #ffffff;
  font-family: var(--font-primary);
  font-size: 1.4rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  text-decoration: none;
  border-radius: 9999px;
  box-shadow: 0 4px 14px rgba(17, 24, 39, 0.2), 0 0 0 1px rgba(255, 255, 255, 0.1) inset;
  transition: background-color 0.25s ease,
    transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1),
    box-shadow 0.25s ease,
    color 0.25s ease;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.nav-cta-btn svg {
  width: 1.4rem;
  height: 1.4rem;
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.nav-cta-btn:hover {
  background: #000000;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(17, 24, 39, 0.28);
}

.nav-cta-btn:hover svg {
  transform: translate(2px, -2px);
}

/* CTA Adaptation over Inverted Hero */
.header.header--inverted:not(.header--white) .nav-cta-btn {
  background: #ffffff;
  color: #111827;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
}

.header.header--inverted:not(.header--white) .nav-cta-btn:hover {
  background: #f8fafc;
  color: #000000;
  transform: translateY(-1px);
}

@media (min-width: 1200px) {
  .nav-cta-btn {
    display: inline-flex;
  }
}

/* --------------------------------------------------------------------------
   Minimalist Modern Hamburger Button (< 1200px)
   -------------------------------------------------------------------------- */
.burger-btn {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 0.6rem;
  width: 4.4rem;
  height: 4.4rem;
  border-radius: 9999px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(0, 0, 0, 0.08);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  cursor: pointer;
  padding: 0;
  flex-shrink: 0;
  transition: background-color 0.25s ease, transform 0.2s ease, border-color 0.25s ease;
}

.header.header--inverted:not(.header--white) .burger-btn {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.25);
  color: #ffffff;
}

.burger-btn:hover {
  transform: scale(1.05);
}

.burger-btn__line {
  display: block;
  width: 2rem;
  height: 2px;
  background-color: currentColor;
  border-radius: 2px;
  transform-origin: center;
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1),
    opacity 0.25s ease,
    background-color 0.25s ease;
}

/* Morphing Hamburger -> Close "X" */
.burger-btn.burger-btn--open .burger-btn__line--1 {
  transform: translateY(0.4rem) rotate(45deg);
}

.burger-btn.burger-btn--open .burger-btn__line--2 {
  transform: translateY(-0.4rem) rotate(-45deg);
}

@media (min-width: 1200px) {
  .burger-btn {
    display: none;
  }
}

/* --------------------------------------------------------------------------
   Arbuda Mobile & Tablet Navigation Drawer (< 1200px)
   -------------------------------------------------------------------------- */
.burger-menu {
  position: fixed;
  inset: 0;
  z-index: 1050;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.burger-menu.burger-menu--open {
  opacity: 1;
  pointer-events: auto;
}

/* Deep blur backdrop */
.burger-menu__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  opacity: 0;
  transition: opacity 0.35s ease;
}

.burger-menu.burger-menu--open .burger-menu__backdrop {
  opacity: 1;
}

/* Sliding Drawer Sheet */
.burger-menu__content {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(100%, 42rem);
  background: #ffffff;
  display: flex;
  flex-direction: column;
  padding: 3rem 2.8rem 3.5rem;
  transform: translateX(100%);
  transition: transform 0.45s cubic-bezier(0.16, 1, 0.3, 1);
  overflow-y: auto;
  box-shadow: -10px 0 35px rgba(0, 0, 0, 0.12);
  border-radius: 2.4rem 0 0 2.4rem;
}

.burger-menu.burger-menu--open .burger-menu__content {
  transform: translateX(0);
}

/* Drawer Top Bar */
.burger-menu__header {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  margin-top: 2.5rem;
  padding-bottom: 1.2rem;
  margin-bottom: 1.2rem;
}

.burger-menu__close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3.6rem;
  height: 3.6rem;
  border: none;
  background: transparent;
  outline: none;
  box-shadow: none;
  color: #1e293b;
  cursor: pointer;
  padding: 0;
  transition: transform 0.25s ease, color 0.2s ease;
}

.burger-menu__close svg {
  width: 2rem;
  height: 2rem;
}

.burger-menu__close:hover {
  transform: rotate(90deg);
  color: #000000;
}

/* Mobile Nav Clean Borderless List */
.burger-menu__nav {
  display: flex;
  flex-direction: column;
  gap: 0;
  flex: 1 0 auto;
}

.burger-accordion {
  border: none;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  outline: none;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  transition: border-color 0.25s ease;
}

.burger-accordion.burger-accordion--open {
  background: transparent;
  border-color: rgba(0, 0, 0, 0.12);
}

.burger-accordion__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 1.6rem 0;
  font-family: var(--font-primary);
  font-size: 1.9rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: #0f172a;
  background: transparent;
  border: none;
  outline: none;
  box-shadow: none;
  cursor: pointer;
  text-align: left;
  transition: color 0.2s ease;
}

.burger-accordion__arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  color: #64748b;
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.burger-accordion__arrow svg {
  width: 100%;
  height: 100%;
}

.burger-accordion.burger-accordion--open .burger-accordion__arrow {
  transform: rotate(180deg);
  color: #0f172a;
}

/* Accordion Collapsible Panel */
.burger-accordion__panel {
  display: none;
  flex-direction: column;
  gap: 0.8rem;
  padding: 0 0 1.6rem 1.4rem;
  animation: accordionFade 0.25s ease-out forwards;
}

.burger-accordion.burger-accordion--open .burger-accordion__panel {
  display: flex;
}

@keyframes accordionFade {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Accordion Sub-items (Clean Typography, No Grey Box) */
.burger-subitem {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 0.8rem 0;
  border-radius: 0;
  border: none;
  outline: none;
  box-shadow: none;
  text-decoration: none;
  background: transparent;
  transition: transform 0.2s ease;
}

.burger-subitem:hover,
.burger-subitem:active {
  background: transparent;
  transform: translateX(4px);
}

.burger-subitem strong {
  font-family: var(--font-primary);
  font-size: 1.45rem;
  font-weight: 600;
  color: #1e293b;
}

.burger-subitem span {
  font-family: var(--font-primary);
  font-size: 1.2rem;
  font-weight: 400;
  color: #64748b;
}

/* Direct Link in Mobile Menu (Clean Typography, No Grey Box) */
.burger-menu__direct-link {
  border: none;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  outline: none;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.burger-menu__link {
  display: block;
  padding: 1.6rem 0;
  font-family: var(--font-primary);
  font-size: 1.9rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: #0f172a;
  text-decoration: none;
  border: none;
  outline: none;
  box-shadow: none;
  transition: color 0.2s ease;
}

.burger-menu__link:hover {
  color: #0284c7;
}

/* Quick Contact Dock at Bottom of Drawer */
.burger-menu__dock {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  display: flex;
  flex-direction: column;
  gap: 1.8rem;
}

.burger-menu__cta-wrap {
  width: 100%;
}

.burger-menu__cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  width: 100%;
  padding: 1.4rem 2rem;
  border-radius: 9999px;
  background: #111827;
  color: #ffffff;
  font-family: var(--font-primary);
  font-size: 1.5rem;
  font-weight: 600;
  text-decoration: none;
  box-shadow: 0 4px 16px rgba(17, 24, 39, 0.25);
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.burger-menu__cta svg {
  width: 1.8rem;
  height: 1.8rem;
}

.burger-menu__cta:hover,
.burger-menu__cta:active {
  background: #000000;
  transform: translateY(-1px);
}

.burger-menu__meta {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.burger-menu__email {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-family: var(--font-primary);
  font-size: 1.35rem;
  color: #64748b;
  text-decoration: none;
  transition: color 0.2s ease;
}

.burger-menu__email svg {
  width: 1.6rem;
  height: 1.6rem;
  flex-shrink: 0;
}

.burger-menu__email:hover {
  color: #0f172a;
}

.burger-menu__branches {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.branch-pill {
  font-family: var(--font-primary);
  font-size: 1.15rem;
  font-weight: 600;
  padding: 0.4rem 1rem;
  border-radius: 9999px;
  background: #f1f5f9;
  color: #475569;
  border: 1px solid rgba(0, 0, 0, 0.04);
}

/* Prevent body scroll when menu is active */
body.menu-open {
  overflow: hidden;
}