/* =============================================
   NAVIGATION
   ============================================= */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(13, 27, 20, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  border-bottom: 1px solid rgba(87, 204, 153, 0.1);
}

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

.logo {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--primary);
  letter-spacing: 0.05em;
  transition: color var(--transition-fast);
}

.logo:hover {
  color: var(--primary-light);
}

.nav__list {
  display: flex;
  gap: var(--space-xl);
}

.nav__link {
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width var(--transition-base);
}

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

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-sm);
}

.nav-toggle__bar {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-fast);
}

.nav-toggle.active .nav-toggle__bar:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active .nav-toggle__bar:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

.header ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.header a {
  text-decoration: none;
}

.nav-toggle {
  border: none;
  background: none;
  cursor: pointer;
}

@media (max-width: 768px) {
  .nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: rgba(13, 27, 20, 0.98);
    padding: var(--space-lg);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    border-bottom: 1px solid rgba(87, 204, 153, 0.1);
  }

  .nav.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

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

  .nav__link {
    font-size: var(--text-lg);
  }

  .nav-toggle {
    display: flex;
  }
}