.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  transition: box-shadow var(--transition);
}

.scrolled {
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.15);
}

.container {
  @include container;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.logo {
  font-family: $font-display;
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: 0.02em;
  color: var(--accent);
  transition: opacity var(--transition);

  &:hover {
    opacity: 0.85;
  }
}

.nav {
  display: flex;
  align-items: center;
  gap: 2rem;

  @include respond(md) {
    display: none;
  }
}

.navLink {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-2);
  position: relative;
  padding-bottom: 2px;

  &::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 2px;
    background: var(--accent);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.25s ease;
    border-radius: 1px;
  }

  &:hover {
    color: var(--text);

    &::after {
      transform: scaleX(1);
      transform-origin: left;
    }
  }
}

.hamburger {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  border-radius: 8px;
  color: var(--text);

  @include respond(md) {
    display: flex;
  }

  &:hover {
    background: var(--bg-2);
  }

  span {
    display: block;
    width: 20px;
    height: 2px;
    background: currentColor;
    border-radius: 2px;
    transition: transform 0.25s ease, opacity 0.25s ease;
  }
}

.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobileMenu {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  padding: 0.5rem 0 1rem;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
}

.mobileLink {
  display: block;
  padding: 0.75rem clamp(1.25rem, 5vw, 2.5rem);
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-2);
  transition: color var(--transition), background var(--transition);

  &:hover {
    color: var(--accent);
    background: var(--bg-2);
  }
}