/* Responsive Design - Mobile-First Approach */
/* Extra Small Devices (320px and up) */
@media (max-width: 374px) {
  :root {
    --space-4: 0.75rem;
    --space-6: 1rem;
    --space-8: 1.5rem;
    --space-12: 2rem;
    --space-16: 2.5rem;
    --space-20: 3rem;
    --space-24: 4rem;
  }

  .container {
    padding: 0 var(--space-3);
  }

  .hero-title {
    font-size: 1.75rem;
    line-height: 1.2;
  }

  .section-title {
    font-size: 1.5rem;
  }

  .hero-stats {
    flex-direction: column;
    gap: var(--space-3);
    align-items: center;
  }

  .stat-item {
    width: 100%;
    max-width: 200px;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  .image-container {
    width: 200px;
    height: 280px;
  }

  .floating-card {
    display: none;
  }

  .nav-brand {
    gap: var(--space-2);
  }

  .brand-logo {
    width: 32px;
    height: 32px;
    font-size: 0.875rem;
  }

  .brand-name {
    font-size: 1rem;
  }

  .toast {
    right: var(--space-3);
    left: var(--space-3);
    min-width: auto;
  }
}

/* Small Devices (375px to 479px) */
@media (min-width: 375px) and (max-width: 479px) {
  .container {
    padding: 0 var(--space-4);
  }

  .hero-title {
    font-size: 2rem;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .image-container {
    width: 220px;
    height: 300px;
  }

  .hero-stats {
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-4);
  }

  .stat-item {
    flex: 1;
    min-width: 120px;
  }
}

/* Medium Small Devices (480px to 767px) */
@media (min-width: 480px) and (max-width: 767px) {
  .hero-title {
    font-size: 2.25rem;
  }

  .section-title {
    font-size: 2rem;
  }

  .image-container {
    width: 250px;
    height: 320px;
  }

  .hero-stats {
    justify-content: center;
    gap: var(--space-6);
  }

  .hero-actions {
    flex-direction: row;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-3);
  }

  .btn {
    flex: 1;
    min-width: 140px;
  }
}

/* Tablets and Small Laptops (768px to 1023px) */
@media (max-width: 1023px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: var(--space-12);
    text-align: center;
  }

  .hero-right {
    order: -1;
  }

  .hero-left {
    max-width: none;
  }

  .contact-content {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }

  .services-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-6);
  }

  .projects-grid {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-6);
  }

  .skills-showcase {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .certifications-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .education-timeline::before {
    left: var(--space-8);
  }

  .timeline-marker {
    left: var(--space-8);
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-8);
    text-align: center;
  }

  .footer-brand {
    justify-content: center;
  }

  .footer-social {
    align-items: center;
  }
}

/* Mobile Devices (768px and below) */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(10, 15, 28, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: var(--space-6);
    gap: var(--space-4);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  }

  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-link {
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-lg);
    text-align: center;
    font-size: 1rem;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-toggle.active .bar:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .nav-toggle.active .bar:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.active .bar:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }

  .hero {
    padding: var(--space-20) 0 var(--space-12);
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .section-title {
    font-size: 2rem;
  }

  .hero-stats {
    justify-content: center;
    flex-wrap: wrap;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
    width: 100%;
  }

  .btn {
    width: 100%;
    max-width: 280px;
  }

  .floating-card {
    display: none;
  }

  .image-container {
    width: 280px;
    height: 350px;
  }

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

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

  .tech-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
  }

  .tech-item {
    padding: var(--space-3);
  }

  .tech-item i {
    font-size: 1.25rem;
  }

  .tech-item span {
    font-size: 0.875rem;
  }

  .skill-category {
    padding: var(--space-6);
  }

  .category-icon {
    width: 50px;
    height: 50px;
    font-size: 1.25rem;
  }

  .service-card {
    padding: var(--space-6);
  }

  .service-icon {
    width: 50px;
    height: 50px;
    font-size: 1.25rem;
  }

  .project-image {
    height: 200px;
  }

  .education-card {
    padding: var(--space-6);
  }

  .education-icon {
    width: 60px;
    height: 60px;
    font-size: 1.5rem;
  }

  .cert-card {
    padding: var(--space-6);
  }

  .cert-icon {
    width: 60px;
    height: 60px;
    font-size: 1.5rem;
  }

  .contact-card {
    padding: var(--space-4);
  }

  .contact-icon {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }

  .contact-form {
    padding: var(--space-6);
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-8);
    text-align: center;
  }

  .footer-brand {
    justify-content: center;
  }

  .footer-description {
    max-width: none;
  }

  .footer-social {
    align-items: center;
  }

  .footer-link:hover {
    transform: translateY(-2px);
  }

  .footer-copyright p {
    flex-direction: column;
    gap: var(--space-2);
  }
}

/* Very Small Mobile Devices (480px and below) */
@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-4);
  }

  .hero-title {
    font-size: 2rem;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .hero-stats {
    gap: var(--space-4);
  }

  .stat-number {
    font-size: 1.5rem;
  }

  .image-container {
    width: 250px;
    height: 320px;
  }

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

  .toast {
    right: var(--space-4);
    left: var(--space-4);
    min-width: auto;
  }

  .toast-content {
    padding: var(--space-3) var(--space-4);
  }

  .section-header {
    margin-bottom: var(--space-12);
  }

  .about,
  .skills,
  .services,
  .projects,
  .education,
  .contact {
    padding: var(--space-16) 0;
  }

  .hero {
    padding: var(--space-16) 0 var(--space-12);
  }

  .footer {
    padding: var(--space-16) 0 var(--space-6);
  }
}

/* Landscape Mobile Devices */
@media (max-height: 500px) and (orientation: landscape) {
  .hero {
    min-height: auto;
    padding: var(--space-12) 0;
  }

  .hero-content {
    gap: var(--space-8);
  }

  .image-container {
    width: 200px;
    height: 250px;
  }

  .floating-card {
    display: none;
  }

  .section-header {
    margin-bottom: var(--space-8);
  }

  .about,
  .skills,
  .services,
  .projects,
  .education,
  .contact {
    padding: var(--space-12) 0;
  }
}

/* Large Tablets (1024px to 1199px) */
@media (min-width: 1024px) and (max-width: 1199px) {
  .hero-content {
    gap: var(--space-12);
  }

  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .skills-showcase {
    grid-template-columns: repeat(2, 1fr);
  }

  .certifications-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Desktop and Large Screens (1200px and up) */
@media (min-width: 1200px) {
  .container {
    max-width: 1400px;
  }

  .hero-title {
    font-size: 4rem;
  }

  .section-title {
    font-size: 3rem;
  }

  .image-container {
    width: 400px;
    height: 500px;
  }

  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Ultra-wide Screens (1400px and up) */
@media (min-width: 1400px) {
  .container {
    max-width: 1600px;
  }

  .hero-content {
    gap: var(--space-20);
  }

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

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

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

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

/* Dark Mode Support (if system preference) */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #0a0f1c;
    --bg-secondary: #1a1f2e;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
  }
}

/* Print Styles */
@media print {
  .navbar,
  .floating-elements,
  .floating-card,
  .toast {
    display: none !important;
  }

  body {
    background: white !important;
    color: black !important;
  }

  .hero,
  .about,
  .skills,
  .services,
  .projects,
  .education,
  .contact {
    padding: 1rem 0 !important;
    background: white !important;
  }

  .section-title {
    color: black !important;
    font-size: 1.5rem !important;
  }

  .btn {
    border: 1px solid black !important;
    background: white !important;
    color: black !important;
  }
}

/* Accessibility Improvements */
@media (prefers-reduced-motion: reduce) {
  .hero-content {
    animation: none;
  }

  .stat-item:hover,
  .social-link:hover,
  .btn:hover,
  .service-card:hover,
  .project-card:hover,
  .skill-category:hover {
    transform: none !important;
  }
}

/* Focus Improvements for Mobile */
@media (max-width: 768px) {
  .btn:focus,
  .nav-link:focus,
  .social-link:focus,
  .project-link:focus {
    outline: 3px solid var(--primary);
    outline-offset: 3px;
  }

  .form-group input:focus,
  .form-group textarea:focus {
    outline: 2px solid var(--primary);
    outline-offset: 1px;
  }
}

/* Touch Device Optimizations */
@media (hover: none) and (pointer: coarse) {
  .btn,
  .nav-link,
  .social-link,
  .project-link,
  .contact-card,
  .service-card,
  .project-card {
    min-height: 44px;
    min-width: 44px;
  }

  .nav-link {
    padding: var(--space-4);
  }

  .btn {
    padding: var(--space-4) var(--space-6);
  }

  /* Remove hover effects on touch devices */
  .stat-item:hover,
  .social-link:hover,
  .tech-item:hover,
  .skill-category:hover,
  .service-card:hover,
  .project-card:hover,
  .education-card:hover,
  .cert-card:hover,
  .contact-card:hover {
    transform: none;
    box-shadow: none;
  }
}