/* Header & Navigation */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: rgba(10, 10, 10, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: var(--z-header);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  transition:
    background-color var(--transition-smooth),
    box-shadow var(--transition-smooth),
    border-color var(--transition-smooth);
}

/* Scrolled state — header becomes more opaque */
.header.is-scrolled {
  background-color: rgba(10, 10, 10, 0.98);
  border-bottom-color: transparent;
}

.header__inner {
  display: flex;
  align-items: center;
  height: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 32px;
  gap: 24px;
}

/* Logo */
.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--color-white);
  flex-shrink: 0;
  transition: opacity var(--transition-fast);
}

.header__logo:hover {
  opacity: 0.85;
  color: var(--color-white);
}

.header__logo-icon {
  width: 28px;
  height: 28px;
}

.header__logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.header__logo-abbr {
  font-size: var(--text-xs);
  color: var(--color-accent);
  letter-spacing: var(--tracking-caps);
}

.header__logo-badge {
  border: 2px solid rgba(255, 255, 255, 0.5);
  padding: 6px 10px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: #fff;
  display: flex;
  align-items: center;
  line-height: 1;
}

.header__logo-name {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 2.5px;
  color: #fff;
  white-space: nowrap;
}

/* Desktop Nav */
.nav {
  display: flex;
  align-items: center;
  gap: 18px;
  flex: 1;
  justify-content: center;
}

.nav__link {
  font-size: 13px;
  font-weight: var(--weight-medium);
  color: rgba(255, 255, 255, 0.8);
  text-transform: none;
  letter-spacing: normal;
  padding: var(--space-sm) 0;
  position: relative;
  transition: color var(--transition-smooth);
  white-space: nowrap;
}

.nav__link:hover,
.nav__link--active {
  color: var(--color-white);
}

/* Underline animation from center */
.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: all var(--transition-smooth);
  transform: translateX(-50%);
}

.nav__link:hover::after,
.nav__link--active::after {
  width: 100%;
}

/* Dropdown */
.nav__item {
  position: relative;
}

.nav__dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  min-width: 240px;
  background-color: rgba(10, 10, 10, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: var(--space-sm) 0;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-smooth);
  box-shadow: var(--shadow-lg);
}

.nav__item:hover .nav__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(4px);
}

.nav__dropdown-link {
  display: block;
  padding: 10px var(--space-lg);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  transition: all var(--transition-fast);
  min-height: 44px;
  display: flex;
  align-items: center;
}

.nav__dropdown-link:hover {
  color: var(--color-white);
  background-color: var(--color-accent-subtle);
  padding-left: calc(var(--space-lg) + 4px);
}

/* Header CTA */
.header__cta {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-shrink: 0;
}

.header__cta .btn--sm {
  padding: 10px 20px;
  font-size: 12px;
  letter-spacing: 1px;
  border-radius: 4px;
  white-space: nowrap;
}

.header__phone {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: color var(--transition-fast);
  letter-spacing: 0.3px;
  white-space: nowrap;
}

.header__phone:hover {
  color: var(--color-accent);
}

.header__phone-icon {
  width: 16px;
  height: 16px;
}

/* Mobile Hamburger */
.header__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-sm);
  cursor: pointer;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
}

.header__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-white);
  transition: all var(--transition-smooth);
  transform-origin: center;
}

.header__hamburger.is-open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.header__hamburger.is-open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.header__hamburger.is-open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Nav */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(10, 10, 10, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: var(--space-xl);
  overflow-y: auto;
  z-index: var(--z-overlay);
  -webkit-overflow-scrolling: touch;
}

.mobile-nav.is-open {
  display: block;
  animation: fadeIn 0.25s ease;
}

.mobile-nav__link {
  display: flex;
  align-items: center;
  padding: var(--space-md) 0;
  font-size: var(--text-lg);
  font-weight: var(--weight-medium);
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-border);
  transition: all var(--transition-fast);
  min-height: 56px;
}

.mobile-nav__link:hover,
.mobile-nav__link:active {
  color: var(--color-accent);
  padding-left: var(--space-sm);
}

.mobile-nav__phone {
  display: block;
  margin-top: var(--space-xl);
  text-align: center;
}

/* Responsive */
@media (max-width: 1024px) {
  .nav,
  .header__phone {
    display: none;
  }

  .header__hamburger {
    display: flex;
  }

  .header__cta {
    gap: var(--space-sm);
  }
}

@media (max-width: 480px) {
  .header__inner {
    padding: 0 16px;
  }
}