/* Header Styles */
#header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background-color: transparent;
  transition: background-color var(--transition-normal), padding var(--transition-normal);
  padding: var(--spacing-md) 0;
}

#header.scrolled {
  background-color: var(--color-primary);
  padding: var(--spacing-xs) 0;
  box-shadow: var(--shadow-md);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 2.8rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-white);
  letter-spacing: 1px;
}

.logo span {
  color: var(--color-secondary);
}

nav ul {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
}

nav ul li {
  display: flex;
  align-items: center;
}

nav ul li a {
  color: var(--color-white);
  font-weight: var(--font-weight-semibold);
  position: relative;
  transition: color var(--transition-fast);
  display: flex;
  align-items: center;
  height: 100%;
  padding: 0.8rem 0;
}

nav ul li a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-secondary);
  transition: width var(--transition-normal);
}

nav ul li a:hover,
nav ul li a.active {
  color: var(--color-secondary-light);
}

nav ul li a:hover::after,
nav ul li a.active::after {
  width: 100%;
}

nav ul li:last-child a {
  padding: 0.8rem 1.6rem;
}

nav ul li:last-child a::after {
  display: none;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 3rem;
  height: 2.1rem;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  height: 3px;
  background-color: var(--color-white);
  border-radius: var(--radius-full);
  transition: all var(--transition-normal);
}

/* Responsive Navigation */
@media (max-width: 768px) {
  .menu-toggle {
    display: flex;
    z-index: 2000;
  }
  
  .menu-toggle.active span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
  }
  
  .menu-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  
  .menu-toggle.active span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
  }
  
  nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 70%;
    max-width: 400px;
    height: 100vh;
    background-color: var(--color-primary);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: right var(--transition-normal);
    box-shadow: var(--shadow-lg);
  }
  
  nav.active {
    right: 0;
  }
  
  nav ul {
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
  }
  
  nav ul li {
    width: 100%;
    text-align: center;
  }
  
  nav ul li a {
    display: block;
    font-size: 2rem;
    padding: var(--spacing-xs) 0;
  }
}