/* ================================
   Simply Nerdy - Responsive Styles
   Mobile-First Breakpoints
   ================================ */

/* ================================
   Mobile Styles (Default - up to 640px)
   ================================ */

/* Mobile navigation */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background-color: var(--bg-primary);
        flex-direction: column;
        padding: var(--spacing-xl);
        gap: var(--spacing-md);
        box-shadow: var(--shadow-lg);
        transform: translateY(-120%);
        opacity: 0;
        transition: transform var(--transition-base), opacity var(--transition-base);
        z-index: 99;
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
    }

    .nav-links a {
        padding: var(--spacing-md) 0;
        border-bottom: 1px solid var(--border);
    }

    .nav-links li:last-child a {
        border-bottom: none;
    }
}

/* Mobile hero */
@media (max-width: 640px) {
    .hero h1 {
        font-size: var(--text-3xl);
    }

    .hero-subtitle {
        font-size: var(--text-lg);
    }

    .hero-cta {
        flex-direction: column;
        align-items: stretch;
    }

    .hero-cta .btn {
        width: 100%;
    }
}

/* Mobile grids */
@media (max-width: 640px) {
    .video-grid,
    .blog-grid {
        grid-template-columns: 1fr;
    }

    .topics-grid {
        grid-template-columns: 1fr;
    }
}

/* Mobile about page */
@media (max-width: 768px) {
    .about-grid {
        grid-template-columns: 1fr;
    }

    .about-sidebar {
        position: static;
    }
}

/* Mobile blog post */
@media (max-width: 968px) {
    .post-layout {
        grid-template-columns: 1fr;
    }

    .post-sidebar {
        position: static;
    }

    .post-header h1 {
        font-size: var(--text-3xl);
    }
}

/* Mobile footer */
@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
}

/* Mobile page hero */
@media (max-width: 640px) {
    .page-hero h1 {
        font-size: var(--text-3xl);
    }

    .page-subtitle {
        font-size: var(--text-lg);
    }
}

/* Mobile filter buttons */
@media (max-width: 640px) {
    .filter-buttons {
        justify-content: flex-start;
    }

    .filter-btn {
        font-size: var(--text-sm);
        padding: var(--spacing-sm) var(--spacing-md);
    }
}

/* ================================
   Tablet Styles (640px - 768px)
   ================================ */

@media (min-width: 640px) and (max-width: 768px) {
    .video-grid,
    .blog-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ================================
   Desktop Styles (1024px+)
   ================================ */

@media (min-width: 1024px) {
    .hero h1 {
        font-size: var(--text-5xl);
    }

    .video-grid,
    .blog-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ================================
   Large Desktop (1440px+)
   ================================ */

@media (min-width: 1440px) {
    .container {
        max-width: 1400px;
    }

    .hero h1 {
        font-size: 3.5rem;
    }
}

/* ================================
   Typography Scaling
   ================================ */

@media (max-width: 640px) {
    :root {
        --text-5xl: 2rem;         /* 32px on mobile */
        --text-4xl: 1.75rem;      /* 28px on mobile */
        --text-3xl: 1.5rem;       /* 24px on mobile */
        --text-2xl: 1.25rem;      /* 20px on mobile */
    }
}

/* ================================
   Touch-Friendly Adjustments
   ================================ */

@media (hover: none) and (pointer: coarse) {
    /* Increase touch targets on touch devices */
    .btn,
    .filter-btn,
    .nav-links a {
        min-height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    /* Disable hover effects on touch devices */
    .card:hover,
    .video-card:hover,
    .post-card:hover {
        transform: none;
        box-shadow: var(--shadow-md);
    }
}

/* ================================
   Print Styles
   ================================ */

@media print {
    .site-header,
    .site-footer,
    .hamburger,
    .hero-cta,
    .btn,
    .cta-box,
    .filter-buttons {
        display: none;
    }

    body {
        font-size: 12pt;
        line-height: 1.5;
        color: black;
    }

    a {
        color: black;
        text-decoration: underline;
    }

    .post-content {
        font-size: 12pt;
    }
}

/* ================================
   Accessibility - Reduced Motion
   ================================ */

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

    html {
        scroll-behavior: auto;
    }
}