/* Navigation Styles */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--navbar-bg);  
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--navbar-border-color);  
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: var(--navbar-bg-scrolled);  
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-family: var(--font-family-display);
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--text-primary);  
    text-decoration: none;
    z-index: 1001; /* Ensure logo is above mobile menu when open */
}

.nav-logo i {
    font-size: 1.2rem;
    color: var(--accent-blue);  
}

/* Base style for nav-links (desktop) */
.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 400;
    font-size: 0.95rem;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: var(--accent-blue); 
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-blue); 
    transition: width 0.3s ease;
}

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

/* Dark Mode Toggle Button Styling */
.dark-mode-toggle {
    cursor: pointer;
    font-size: 1.2rem;
    color: var(--text-primary);
    transition: color 0.3s ease, transform 0.3s ease;
    padding: 5px;
    flex-shrink: 0;
}

.dark-mode-toggle:hover {
    color: var(--accent-blue);
    transform: scale(1.1);
}

/* Mobile Toggle (Hamburger Icon) */
.nav-toggle {
    display: none; 
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
    z-index: 1001;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary); 
    transition: all 0.3s ease;
    border-radius: 2px;
}

/* Hamburger icon animation when active */
.nav-toggle.open span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
.nav-toggle.open span:nth-child(2) {
    opacity: 0;
}
.nav-toggle.open span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}