.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 100;
  transition: all var(--transition-base);
}

.header--scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(10px);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.header__logo-text {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: 5px;
  color: var(--color-white);
  transition: all var(--transition-base);
}

.header--scrolled .header__logo-text {
  color: var(--color-gray-900);
  font-size: 1.5rem;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  list-style: none;
}

.nav__link {
  font-family: var(--font-heading);
  font-weight: var(--fw-semibold);
  font-size: var(--fs-sm);
  color: var(--color-white);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  position: relative;
  padding: var(--space-1) 0;
  transition: color var(--transition-base);
}

.header--scrolled .nav__link {
  color: var(--color-gray-800);
}

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

.nav__link:hover::after,
.nav__link[aria-current="page"]::after {
  width: 100%;
}

.nav__link--cta {
  background: linear-gradient(135deg, var(--color-green-dark), var(--color-green));
  color: var(--color-white) !important;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--border-radius);
}

.nav__link--cta::after {
  display: none;
}

.nav__link--cta:hover {
  background: linear-gradient(135deg, var(--color-green), var(--color-green-dark));
  transform: translateY(-1px);
}

.nav__toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 32px;
  height: 32px;
  position: relative;
  z-index: 110;
}

.nav__toggle-icon,
.nav__toggle-icon::before,
.nav__toggle-icon::after {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-white);
  transition: all var(--transition-base);
  position: absolute;
  left: 4px;
}

.header--scrolled .nav__toggle-icon,
.header--scrolled .nav__toggle-icon::before,
.header--scrolled .nav__toggle-icon::after {
  background: var(--color-gray-800);
}

.nav__toggle-icon {
  top: 50%;
  transform: translateY(-50%);
}

.nav__toggle-icon::before {
  content: '';
  top: -7px;
}

.nav__toggle-icon::after {
  content: '';
  top: 7px;
}

.nav__toggle[aria-expanded="true"] .nav__toggle-icon {
  background: transparent;
}

.nav__toggle[aria-expanded="true"] .nav__toggle-icon::before {
  top: 0;
  transform: rotate(45deg);
  background: var(--color-white);
}

.nav__toggle[aria-expanded="true"] .nav__toggle-icon::after {
  top: 0;
  transform: rotate(-45deg);
  background: var(--color-white);
}

@media (max-width: 991px) {
  .nav__toggle {
    display: block;
  }

  .nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: linear-gradient(135deg, var(--color-green-dark), var(--color-blue-dark));
    padding: calc(var(--header-height) + var(--space-6)) var(--space-6) var(--space-6);
    transition: right var(--transition-base);
    z-index: 105;
    overflow-y: auto;
  }

  .nav--open {
    right: 0;
  }

  .nav__list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
  }

  .nav__link {
    font-size: var(--fs-md);
    color: var(--color-white);
  }

  .nav__overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 104;
  }

  .nav__overlay--visible {
    display: block;
  }
}