/* Responsive Design for Mobile and Tablet */

/* Large screens (1200px and up) */
@media (min-width: 1200px) {
    .container {
        max-width: 1400px;
    }
    
    .hero-title {
        font-size: 4rem;
    }
    
    .section-title {
        font-size: 3.5rem;
    }
}

/* Medium screens (768px to 1199px) */
@media (max-width: 1199px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--space-2xl);
    }
    
    .hero-avatar {
        width: 300px;
        height: 300px;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }
    
    .reviews-content {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }
}

/* Small screens (576px to 767px) */
@media (max-width: 767px) {
    :root {
        --font-size-5xl: 2.5rem;
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.5rem;
        --space-3xl: 3rem;
    }
    
    .container {
        padding: 0 var(--space-md);
    }
    
    /* Navigation */
    .nav-container {
        padding: 0 var(--space-md);
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-lg);
        padding: var(--space-lg) 0;
        z-index: 999;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-item {
        margin: var(--space-md) 0;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    
    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }
    
    /* Hero Section */
    .hero {
        padding: 100px 0 var(--space-2xl);
    }
    
    .hero-title {
        font-size: 2.5rem;
        line-height: 1.2;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: var(--space-md);
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
    }
    
    .hero-avatar {
        width: 250px;
        height: 250px;
    }
    
    /* About Section */
    .about-stats {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .skills-grid {
        gap: var(--space-md);
    }
    
    /* Projects and Demos */
    .projects-grid,
    .demos-grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    
    .demo-preview,
    .project-image {
        height: 180px;
    }
    
    /* Pricing */
    .pricing-grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    
    .pricing-card.featured {
        transform: none;
        order: -1;
    }
    
    /* Testimonials */
    .testimonials-grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    
    /* Forms */
    .review-form .form-row,
    .contact-form .form-row {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .form-group {
        margin-bottom: var(--space-md);
    }
    
    /* Footer */
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
        text-align: center;
    }
    
    /* Demo Modal */
    .demo-modal-content {
        margin: 10% auto;
        width: 95%;
        max-height: 70vh;
    }
    
    .demo-modal-body {
        height: 300px;
        padding: var(--space-md);
    }
    
    /* Section spacing */
    section {
        padding: var(--space-2xl) 0;
    }
    
    .section-header {
        margin-bottom: var(--space-2xl);
    }
}

/* Extra small screens (up to 575px) */
@media (max-width: 575px) {
    :root {
        --font-size-5xl: 2rem;
        --font-size-4xl: 1.75rem;
        --font-size-3xl: 1.25rem;
        --font-size-2xl: 1.125rem;
        --space-lg: 1rem;
        --space-xl: 1.5rem;
        --space-2xl: 2rem;
        --space-3xl: 2.5rem;
    }
    
    .container {
        padding: 0 var(--space-sm);
    }
    
    .nav-container {
        padding: 0 var(--space-sm);
        height: 60px;
    }
    
    .nav-menu {
        top: 60px;
    }
    
    .hero-title {
        font-size: 1.875rem;
    }
    
    .hero-avatar {
        width: 200px;
        height: 200px;
    }
    
    .social-link {
        width: 40px;
        height: 40px;
    }
    
    .demo-preview,
    .project-image {
        height: 150px;
    }
    
    .testimonial-card,
    .review-form-container,
    .review-stats,
    .contact-form-container {
        padding: var(--space-lg);
    }
    
    .pricing-card {
        padding: var(--space-lg);
    }
    
    .amount {
        font-size: var(--font-size-4xl);
    }
    
    .section-title::after {
        width: 40px;
    }
}

/* Landscape tablets and small laptops */
@media (max-width: 1024px) and (orientation: landscape) {
    .hero-container {
        grid-template-columns: 1fr 1fr;
        text-align: left;
    }
    
    .hero-avatar {
        width: 250px;
        height: 250px;
    }
}

/* Touch device optimizations */
@media (hover: none) and (pointer: coarse) {
    .btn {
        padding: var(--space-md) var(--space-xl);
        font-size: var(--font-size-lg);
    }
    
    .social-link {
        width: 50px;
        height: 50px;
    }
    
    .project-overlay,
    .demo-overlay {
        opacity: 1;
        background: rgba(99, 102, 241, 0.7);
    }
    
    .demo-link,
    .project-link {
        pointer-events: auto;
    }
}

/* High DPI displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .hero-avatar img,
    .author-avatar img {
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
    }
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .scroll-arrow {
        animation: none;
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --text-primary: #f9fafb;
        --text-secondary: #d1d5db;
        --text-light: #9ca3af;
        --bg-primary: #111827;
        --bg-secondary: #1f2937;
        --bg-dark: #030712;
        --border-color: #374151;
    }
    
    .navbar {
        background: rgba(17, 24, 39, 0.95);
        border-bottom-color: var(--border-color);
    }
    
    .hero {
        background: linear-gradient(135deg, #1f2937 0%, #111827 100%);
    }
    
    .demo-card,
    .project-card,
    .testimonial-card,
    .pricing-card,
    .review-form-container,
    .review-stats {
        background: var(--bg-secondary);
        color: var(--text-primary);
    }
    
    .contact-form-container {
        background: var(--bg-secondary);
    }
    
    .skill-tag {
        background: var(--primary-color);
    }
    
    .tech-tag {
        background: var(--bg-primary);
        color: var(--text-secondary);
    }
}

/* Print styles */
@media print {
    * {
        background: white !important;
        color: black !important;
        box-shadow: none !important;
    }
    
    .navbar,
    .demo-modal,
    .scroll-indicator,
    .hamburger {
        display: none !important;
    }
    
    .hero {
        padding: var(--space-lg) 0;
    }
    
    section {
        break-inside: avoid;
        padding: var(--space-lg) 0;
    }
    
    .btn {
        border: 1px solid black;
        background: white;
        color: black;
    }
}

/* Focus styles for accessibility */
@media (any-hover: hover) {
    .btn:focus,
    .nav-link:focus,
    .social-link:focus,
    .project-link:focus,
    .demo-link:focus {
        outline: 2px solid var(--primary-color);
        outline-offset: 2px;
    }
    
    input:focus,
    select:focus,
    textarea:focus {
        box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
    }
}

/* Loading states */
.loading {
    pointer-events: none;
    opacity: 0.6;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--primary-color);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Performance optimizations */
.hero-avatar,
.author-avatar,
.project-image,
.demo-preview {
    contain: layout style paint;
}

/* Scroll snap for better mobile experience */
@media (max-width: 767px) {
    html {
        scroll-snap-type: y proximity;
    }
    
    section {
        scroll-snap-align: start;
    }
}