/* ============================================
   IVPRO Technologies - Navigation Styles
   ============================================ */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-fixed);
  transition: all var(--transition-base);
  padding: var(--space-3) 0;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(18px) saturate(180%);
  -webkit-backdrop-filter: blur(18px) saturate(180%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.45);
  box-shadow:
    0 4px 24px rgba(0, 0, 0, 0.06),
    0 1px 0 rgba(255, 255, 255, 0.6) inset;
}

.header--scrolled {
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(24px) saturate(200%);
  -webkit-backdrop-filter: blur(24px) saturate(200%);
  padding: var(--space-2) 0;
  box-shadow:
    0 8px 32px rgba(0, 0, 0, 0.08),
    0 1px 0 rgba(255, 255, 255, 0.7) inset;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-wide);
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  z-index: var(--z-modal);
}

.logo__full {
  height: 48px;
  width: auto;
  object-fit: contain;
}

/* Navigation */
.nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav__link {
  font-size: var(--fs-body-sm);
  font-weight: var(--fw-medium);
  color: rgba(10, 22, 40, 0.7);
  transition: color var(--transition-base);
  position: relative;
  padding: var(--space-2) 0;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.nav__link svg {
  flex-shrink: 0;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition-base);
  border-radius: var(--radius-full);
}

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

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

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

.nav__dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: var(--radius-lg);
  padding: var(--space-3);
  min-width: 220px;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1), 0 1px 0 rgba(255,255,255,0.5) inset;
}

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

.nav__dropdown-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  font-size: var(--fs-body-sm);
  color: rgba(10, 22, 40, 0.7);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.nav__dropdown-link:hover {
  background: rgba(247, 148, 29, 0.1);
  color: var(--color-accent);
}

.nav__dropdown-link svg {
  width: 18px;
  height: 18px;
  opacity: 0.6;
}

/* CTA */
.nav__cta {
  padding: var(--space-2) var(--space-5);
  font-size: var(--fs-body-sm);
}

/* Mobile Menu Toggle */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  width: 28px;
  cursor: pointer;
  z-index: var(--z-modal);
}

.nav__toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
}

.nav__toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

.nav__toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav__toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

/* Mobile Styles */
@media (max-width: 1024px) {
  .nav__toggle {
    display: flex;
  }

  .nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100vh;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: right var(--transition-slow);
    z-index: var(--z-modal-backdrop);
  }

  .nav.active {
    right: 0;
  }

  .nav__list {
    flex-direction: column;
    align-items: center;
    gap: var(--space-6);
    text-align: center;
    width: min(100%, 520px);
  }

  .nav__link {
    font-size: var(--fs-h4);
    color: var(--color-primary);
    justify-content: center;
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
  }

  .nav__item--dropdown {
    width: min(100%, 460px);
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .nav__item--dropdown > .nav__link {
    width: fit-content;
    min-width: 180px;
  }

  .nav__item--dropdown:hover > .nav__link,
  .nav__item--dropdown:focus-within > .nav__link {
    color: var(--color-accent);
    background: rgba(247, 148, 29, 0.08);
  }

  .nav__dropdown {
    position: static;
    transform: none;
    width: min(92vw, 420px);
    opacity: 0;
    visibility: hidden;
    max-height: 0;
    overflow: hidden;
    background: rgba(0, 0, 0, 0.03);
    margin-top: 0;
    box-shadow: none;
    border: 1px solid rgba(0, 0, 0, 0.05);
    padding: 0 var(--space-3);
    transition: all 0.3s ease;
  }

  .nav__item--dropdown:hover .nav__dropdown,
  .nav__item--dropdown:focus-within .nav__dropdown,
  .nav__item--dropdown.open .nav__dropdown {
    opacity: 1;
    visibility: visible;
    max-height: 500px;
    margin-top: var(--space-3);
    padding: var(--space-3);
    transform: none;
    box-shadow: 0 18px 50px rgba(10, 22, 40, 0.12);
  }

  .nav__dropdown-link {
    justify-content: flex-start;
    text-align: left;
  }

  .nav__item--dropdown .nav__link svg {
    transition: transform 0.3s ease;
  }

  .nav__item--dropdown:hover .nav__link svg,
  .nav__item--dropdown:focus-within .nav__link svg,
  .nav__item--dropdown.open .nav__link svg {
    transform: rotate(180deg);
  }

  .nav__cta {
    margin-top: var(--space-5);
    padding: var(--space-3) var(--space-8);
    font-size: var(--fs-body);
  }
}