/* Header Styles */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-header);
  background-color: #242424;
  transition: background-color var(--transition-medium);
}

.header .container {
  padding: 21px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header.scrolled {
  background-color: rgba(10, 10, 10, 0.95);
  backdrop-filter: blur(0.5rem);
  box-shadow: var(--shadow-md);
}

/* Logo */
.logo {
  z-index: 2;
}

.logo-text {
  font-family: var(--font-secondary);
  font-size: 2.4rem;
  font-weight: 600;
  color: var(--color-text-inverse);
  text-shadow: 0 0.2rem 0.4rem rgba(0, 0, 0, 0.3);
  letter-spacing: 0.1rem;
  transition: color var(--transition-medium);
}

.header.scrolled .logo-text {
  color: var(--color-secondary);
}

/* Navigation */
.nav-list {
  display: flex;
  gap: var(--space-3);
}

.nav-item {
  position: relative;
}

.nav-link {
  color: var(--color-text-inverse);
  font-weight: 500;
  font-size: 1.6rem;
  padding: var(--space-1);
  transition: var(--transition-medium);
  position: relative;
  letter-spacing: 0.05rem;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -0.2rem;
  left: 50%;
  width: 0;
  height: 0.2rem;
  background-color: var(--color-secondary);
  transition: width var(--transition-medium), left var(--transition-medium);
}

.nav-link:hover::after {
  width: 100%;
  left: 0;
}

.header.scrolled .nav-link {
  color: var(--color-text-inverse);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 3rem;
  height: 2.4rem;
  cursor: pointer;
  z-index: 2;
}

.menu-toggle span {
  display: block;
  width: 100%;
  height: 0.2rem;
  background-color: var(--color-text-inverse);
  transition: all var(--transition-medium);
}

.header.scrolled .menu-toggle span {
  background-color: var(--color-text-inverse);
}

.menu-toggle.active span:nth-child(1) {
  transform: translateY(1.1rem) rotate(45deg);
}

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

.menu-toggle.active span:nth-child(3) {
  transform: translateY(-1.1rem) rotate(-45deg);
}

/* Responsive Styles */
@media (max-width: 768px) {
  .menu-toggle {
    display: flex;
  }
  
  .nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100vh;
    background-color: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(0.5rem);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: right var(--transition-medium);
  }
  
  .nav.active {
    right: 0;
  }
  
  .nav-list {
    flex-direction: column;
    text-align: center;
    gap: var(--space-4);
  }
  
  .nav-link {
    font-size: 2.4rem;
  }
}