/* Responsive Design - Mobile-first approach */

/* Mobile styles (default, < 768px) */
@media (max-width: 767px) {
    .feed-sidebar {
        display: none;
    }
    
    .layout-container {
        flex-direction: column;
        padding: 1rem;
    }
    
    .main-content {
        width: 100%;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 60px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 60px);
        background: var(--bg-secondary);
        flex-direction: column;
        align-items: flex-start;
        padding: 2rem;
        transition: left 0.3s;
        border-top: 1px solid var(--border-color);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu li {
        width: 100%;
        padding: 0.5rem 0;
    }
    
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        border: none;
        box-shadow: none;
        margin-left: 1rem;
        margin-top: 0.5rem;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.75rem;
    }
    
    article {
        padding: 1.5rem;
    }
    
    .nav-container {
        padding: 0.5rem 1rem;
    }
}

/* Tablet styles (768px - 1024px) */
@media (min-width: 768px) and (max-width: 1024px) {
    .feed-sidebar {
        width: 250px;
    }
    
    .layout-container {
        padding: 1.5rem;
    }
    
    h1 {
        font-size: 2.25rem;
    }
}

/* Desktop styles (> 1024px) */
@media (min-width: 1025px) {
    .feed-sidebar {
        display: block;
    }
    
    .layout-container {
        max-width: 1400px;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --bg-primary: #1a1a1a;
        --bg-secondary: #0f0f0f;
        --text-primary: #ffffff;
        --text-secondary: #e0e0e0;
        --link-color: #9bb3ff;
        --border-color: #606060;
    }
}