/* ==================== HEADER ==================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: var(--color-white);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
  transition: all var(--transition-base);
}

.header.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  transition: padding var(--transition-base);
}

.logo-img {
  height: 50px;
  width: auto;
  transition: height var(--transition-base);
}

.header.scrolled .logo-img {
    height: 30px;
}

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

.nav-link {
  font-weight: 500;
  color: var(--color-secondary);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
  background-color: rgba(37, 99, 235, 0.1);
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-secondary);
}

/* ==================== RESPONSIVE DESIGN ==================== */

@media (max-width: 768px) {
    .nav {
        position: fixed;
        top: 60px;
        left: 0;
        width: 100%;
        background-color: var(--color-white);
        box-shadow: var(--shadow-lg);
        transform: translateX(-100%);
        transition: var(--transition-base);
    }
    
    .nav-link.active {
        transform: translateX(0);
        padding: 4px 100px;
    }
    
    .nav-list {
        flex-direction: column;
        padding: var(--spacing-lg);
        gap: 0;
    }
    
    .nav-link {
        width: 100%;
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--color-gray-light);
    }
    
    .mobile-toggle {
        display: block;
    }
    
    .hero {
        padding: 6rem 0 var(--spacing-xl);
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.75rem;
    }
}