/* Navigation Styles - Clean & Minimal */
.main-navigation {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    transition: all var(--transition-fast);
    height: var(--header-height);
}

.main-navigation.scrolled {
    background-color: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-6);
    display: flex;
    align-items: center;
    justify-content: center; /* Wyśrodkowanie menu */
    height: 100%;
}

/* Navigation Menu */
.nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: var(--spacing-8); /* Większy odstęp między elementami */
}

.nav-item {
    position: relative;
}

.nav-link {
    display: block;
    padding: var(--spacing-3) var(--spacing-4);
    color: var(--color-text-secondary);
    text-decoration: none;
    border-radius: var(--radius-lg);
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-base);
    transition: all var(--transition-fast);
    position: relative;
    white-space: nowrap;
}

.nav-link:hover {
    color: var(--color-primary);
    background-color: var(--color-bg-secondary);
    text-decoration: none;
}

.nav-link:focus-visible {
    outline: 2px solid var(--color-border-focus);
    outline-offset: 2px;
}

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

.nav-text {
    font-family: var(--font-primary);
    letter-spacing: 0.01em;
}

/* Mobile Toggle Button */
.nav-toggle {
    display: none;
    position: absolute;
    left: var(--spacing-4);
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-1);
    background: none;
    border: none;
    color: var(--color-text-primary);
    cursor: pointer;
    padding: var(--spacing-2);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav-toggle:hover {
    background-color: var(--color-bg-secondary);
    color: var(--color-primary);
}

.nav-toggle-icon {
    width: 24px;
    height: 18px;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after,
.nav-toggle-icon {
    background: currentColor;
    height: 2px;
    border-radius: 1px;
    transition: all var(--transition-fast);
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
}

.nav-toggle-icon::before {
    top: 0;
}

.nav-toggle-icon::after {
    bottom: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon {
    background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::before {
    transform: rotate(45deg);
    top: 50%;
    margin-top: -1px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::after {
    transform: rotate(-45deg);
    bottom: 50%;
    margin-bottom: -1px;
}

.nav-toggle-text {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Mobile Styles */
@media (max-width: 768px) {
    .nav-container {
        justify-content: space-between;
        padding: 0 var(--spacing-4);
    }
    
    .nav-toggle {
        display: flex;
        position: static;
    }
    
    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        border-top: 1px solid var(--color-border);
        border-bottom: 1px solid var(--color-border);
        flex-direction: column;
        gap: 0;
        padding: var(--spacing-4);
        transform: translateY(-10px);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
        box-shadow: var(--shadow-lg);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-item {
        width: 100%;
    }
    
    .nav-link {
        width: 100%;
        padding: var(--spacing-3) var(--spacing-4);
        text-align: center;
        border-radius: var(--radius-lg);
        margin-bottom: var(--spacing-1);
    }
    
    .nav-link.active {
        background-color: rgba(37, 99, 235, 0.1);
    }
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
    .main-navigation {
        background-color: rgba(30, 41, 59, 0.95);
        border-bottom-color: var(--color-gray-700);
    }
    
    .main-navigation.scrolled {
        background-color: var(--color-gray-800);
    }
    
    .nav-toggle:hover {
        background-color: var(--color-gray-700);
    }
    
    .nav-link:hover {
        background-color: var(--color-gray-700);
    }
    
    .nav-link.active {
        background-color: rgba(59, 130, 246, 0.2);
    }
    
    @media (max-width: 768px) {
        .nav-menu {
            background-color: var(--color-gray-800);
            border-color: var(--color-gray-700);
        }
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    .nav-link,
    .nav-toggle,
    .nav-menu,
    .nav-toggle-icon,
    .nav-toggle-icon::before,
    .nav-toggle-icon::after {
        transition: none !important;
    }
}