/*
===============================================
  PROFESSIONAL PORTFOLIO WEBSITE
  Responsive Stylesheet
  Author: Hans
  Version: 1.0
  
  Breakpoints:
  - xs: 0-575px (Mobile Portrait)
  - sm: 576-767px (Mobile Landscape)
  - md: 768-991px (Tablet)
  - lg: 992-1199px (Desktop)
  - xl: 1200-1399px (Large Desktop)
  - xxl: 1400px+ (Extra Large Desktop)
===============================================
*/

/* ========================================
   EXTRA LARGE DESKTOP (1400px+)
======================================== */

@media (min-width: 1400px) {
  :root {
    --text-6xl: 4rem;
    --text-7xl: 5rem;
  }

  .container {
    max-width: var(--container-2xl);
  }

  .hero-title {
    font-size: 5rem;
  }

  .section-title {
    font-size: 3.5rem;
  }
}

/* ========================================
   LARGE DESKTOP (1200px - 1399px)
======================================== */

@media (max-width: 1399px) {
  .container {
    max-width: var(--container-xl);
  }

  .hero-title {
    font-size: var(--text-6xl);
  }

  .floating-card {
    padding: var(--spacing-md);
  }

  .card-1 {
    right: -5%;
  }

  .card-2 {
    left: -5%;
  }
}

/* ========================================
   DESKTOP (992px - 1199px)
======================================== */

@media (max-width: 1199px) {
  :root {
    --text-5xl: 2.5rem;
    --text-6xl: 3.25rem;
    --spacing-3xl: 5rem;
  }

  .container {
    max-width: var(--container-lg);
    padding: 0 var(--spacing-md);
  }

  .section {
    padding: var(--spacing-2xl) 0;
  }

  /* Navigation */
  .nav-menu {
    gap: var(--spacing-xs);
  }

  .nav-link {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: var(--text-sm);
  }

  /* Hero Section */
  .hero-content {
    gap: var(--spacing-2xl);
  }

  .hero-title {
    font-size: var(--text-5xl);
  }

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

  .shape-1 {
    width: 250px;
    height: 250px;
  }

  .shape-2 {
    width: 150px;
    height: 150px;
  }

  .shape-4 {
    width: 200px;
    height: 200px;
  }

  /* About Section */
  .about-content {
    gap: var(--spacing-2xl);
  }

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

  /* Skills Section */
  .tech-icons {
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: var(--spacing-md);
  }

  /* Portfolio Section */
  .portfolio-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
  }

  /* Footer */
  .footer-content {
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: var(--spacing-2xl);
  }
}

/* ========================================
   TABLET (768px - 991px)
======================================== */

@media (max-width: 991px) {
  :root {
    --text-4xl: 1.875rem;
    --text-5xl: 2.25rem;
    --text-6xl: 2.75rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
  }

  .container {
    max-width: var(--container-md);
  }

  /* Navigation */
  .navbar {
    padding: var(--spacing-sm) 0;
  }

  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 300px;
    height: 100vh;
    background: var(--bg-card);
    flex-direction: column;
    align-items: flex-start;
    padding: 100px var(--spacing-xl) var(--spacing-xl);
    box-shadow: var(--shadow-2xl);
    transition: right var(--transition-base);
    /* Ensure mobile menu is above the overlay and interactive */
    z-index: 99999; /* much higher to avoid stacking conflicts */
    overflow-y: auto;
    -webkit-overflow-scrolling: touch; /* smooth scrolling on iOS */
    touch-action: manipulation; /* better touch/click behavior */
    transform: translateZ(0); /* create its own stacking context */
  }

  /* Make sure links inside the mobile menu accept pointer/touch events */
  .nav-menu,
  .nav-menu a,
  .nav-menu button {
    pointer-events: auto;
  }

  /* Ensure active menu is interactive */
  .nav-menu.active {
    right: 0;
    pointer-events: auto;
  }

  .nav-menu.active {
    right: 0;
  }

  .nav-item {
    width: 100%;
  }

  .nav-link {
    width: 100%;
    padding: var(--spacing-md);
    justify-content: flex-start;
    cursor: pointer;
    touch-action: manipulation; /* improve touch responsiveness */
    -webkit-tap-highlight-color: transparent; /* remove tap highlight on mobile */
  }

  .nav-link i {
    opacity: 1;
    transform: translateX(0);
  }

  .nav-link::before {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  /* Overlay for mobile menu */
  .nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    /* Sit under the mobile menu but above page content */
    z-index: 99998;
    pointer-events: auto; /* allow tapping to close */
    -webkit-tap-highlight-color: transparent;
  }

  .nav-overlay.active {
    opacity: 1;
    visibility: visible;
  }

  /* Hero Section */
  .hero {
    min-height: auto;
    padding: 120px 0 var(--spacing-3xl);
  }

  .hero-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-3xl);
    text-align: center;
  }

  .hero-text {
    max-width: 100%;
    order: 1;
  }

  .hero-image {
    order: 2;
  }

  .hero-title {
    font-size: var(--text-5xl);
  }

  .hero-subtitle {
    justify-content: center;
  }

  .hero-buttons {
    justify-content: center;
  }

  .hero-social {
    justify-content: center;
  }

  .image-wrapper {
    max-width: 400px;
  }

  .floating-card {
    display: none;
  }

  .scroll-indicator {
    bottom: 20px;
  }

  /* Section Headers */
  .section-title {
    font-size: var(--text-4xl);
  }

  /* About Section */
  .about-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-3xl);
  }

  .about-info {
    padding-left: 0;
  }

  .about-details {
    grid-template-columns: 1fr;
  }

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

  /* Skills Section */
  .skills-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
  }

  .tech-icons {
    grid-template-columns: repeat(5, 1fr);
  }

  /* Portfolio Section */
  .portfolio-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Experience Section */
  .timeline-wrapper {
    grid-template-columns: 1fr;
    gap: var(--spacing-3xl);
  }

  /* Contact Section */
  .contact-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
  }

  .contact-info {
    position: static;
  }

  /* Footer */
  .footer-content {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
  }

  .footer-col:first-child {
    grid-column: 1 / -1;
  }
}

/* ========================================
   MOBILE LANDSCAPE (576px - 767px)
======================================== */

@media (max-width: 767px) {
  :root {
    --text-3xl: 1.5rem;
    --text-4xl: 1.75rem;
    --text-5xl: 2rem;
    --text-6xl: 2.25rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 2.5rem;
    --spacing-3xl: 3rem;
  }

  .container {
    padding: 0 var(--spacing-md);
  }

  /* Typography */
  h1 { font-size: var(--text-5xl); }
  h2 { font-size: var(--text-4xl); }
  h3 { font-size: var(--text-3xl); }
  h4 { font-size: var(--text-2xl); }

  /* Navigation */
  .nav-menu {
    width: 280px;
    padding: 80px var(--spacing-lg) var(--spacing-lg);
  }

  .logo a {
    font-size: var(--text-xl);
  }

  /* Hero Section */
  .hero {
    padding: 100px 0 var(--spacing-2xl);
  }

  .hero-title {
    font-size: var(--text-4xl);
    line-height: 1.2;
  }

  .hero-description {
    font-size: var(--text-base);
  }

  .hero-buttons {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

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

  .image-wrapper {
    max-width: 350px;
  }

  .image-border {
    top: -10px;
    right: -10px;
  }

  /* Floating Shapes */
  .shape {
    opacity: 0.05;
  }

  .shape-1 {
    width: 200px;
    height: 200px;
  }

  .shape-2 {
    width: 120px;
    height: 120px;
  }

  .shape-3 {
    width: 100px;
    height: 100px;
  }

  .shape-4 {
    width: 150px;
    height: 150px;
  }

  /* Section */
  .section {
    padding: var(--spacing-2xl) 0;
  }

  .section-header {
    margin-bottom: var(--spacing-2xl);
  }

  .section-title {
    font-size: var(--text-3xl);
  }

  .section-subtitle {
    font-size: var(--text-sm);
  }

  /* About Section */
  .about-title {
    font-size: var(--text-2xl);
  }

  .about-text {
    font-size: var(--text-base);
  }

  .experience-badge {
    padding: var(--spacing-sm) var(--spacing-md);
  }

  .experience-badge h3 {
    font-size: var(--text-4xl);
  }

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

  .service-card {
    padding: var(--spacing-lg);
  }

  .service-icon {
    width: 70px;
    height: 70px;
    font-size: var(--text-3xl);
  }

  /* Skills Section */
  .skills-category {
    padding: var(--spacing-lg);
  }

  .category-title {
    font-size: var(--text-xl);
  }

  .tech-icons {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
  }

  .tech-icon {
    padding: var(--spacing-md);
  }

  .tech-icon i {
    font-size: var(--text-4xl);
  }

  .tech-icon span {
    font-size: var(--text-xs);
  }

  /* Portfolio Section */
  .portfolio-filter {
    gap: var(--spacing-xs);
  }

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

  .portfolio-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .portfolio-title {
    font-size: var(--text-xl);
  }

  /* Experience Section */
  .timeline-heading {
    font-size: var(--text-xl);
  }

  .timeline {
    padding-left: var(--spacing-lg);
  }

  .timeline-content {
    padding: var(--spacing-md);
  }

  .timeline-content h3 {
    font-size: var(--text-lg);
  }

  /* Testimonials Section */
  .testimonial-card {
    padding: var(--spacing-lg);
  }

  .quote-icon {
    width: 50px;
    height: 50px;
    font-size: var(--text-2xl);
  }

  .testimonial-text {
    font-size: var(--text-base);
  }

  .swiper-button-prev,
  .swiper-button-next {
    width: 40px;
    height: 40px;
  }

  .swiper-button-prev::after,
  .swiper-button-next::after {
    font-size: var(--text-base);
  }

  /* Contact Section */
  .contact-info-title {
    font-size: var(--text-2xl);
  }

  .contact-info-text {
    font-size: var(--text-base);
  }

  .contact-form-wrapper {
    padding: var(--spacing-xl);
  }

  .form-input {
    padding: var(--spacing-sm) var(--spacing-sm) var(--spacing-sm) 45px;
  }

  .form-icon {
    left: var(--spacing-sm);
    font-size: var(--text-base);
  }

  /* Footer */
  .footer {
    padding: var(--spacing-2xl) 0 var(--spacing-md);
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    padding-bottom: var(--spacing-2xl);
  }

  .footer-col:first-child {
    grid-column: auto;
  }

  .footer-logo {
    font-size: var(--text-2xl);
  }

  /* Scroll Top Button */
  .scroll-top {
    width: 45px;
    height: 45px;
    bottom: 20px;
    right: 20px;
  }
}

/* ========================================
   MOBILE PORTRAIT (0px - 575px)
======================================== */

@media (max-width: 575px) {
  :root {
    --text-2xl: 1.25rem;
    --text-3xl: 1.5rem;
    --text-4xl: 1.75rem;
    --text-5xl: 2rem;
    --text-6xl: 2rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.25rem;
    --spacing-xl: 1.5rem;
    --spacing-2xl: 2rem;
    --spacing-3xl: 2.5rem;
  }

  .container {
    padding: 0 var(--spacing-sm);
  }

  /* Navigation */
  .navbar {
    padding: var(--spacing-xs) 0;
  }

  .navbar.scrolled {
    padding: var(--spacing-xs) 0;
  }

  .nav-menu {
    width: 100%;
    right: -100%;
    padding: 70px var(--spacing-md) var(--spacing-md);
  }

  .logo a {
    font-size: var(--text-lg);
  }

  .theme-toggle,
  .hamburger {
    width: 40px;
    height: 40px;
  }

  /* Hero Section */
  .hero {
    padding: 80px 0 var(--spacing-xl);
  }

  .hero-content {
    gap: var(--spacing-2xl);
  }

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

  .hero-title {
    font-size: var(--text-3xl);
    margin-bottom: var(--spacing-sm);
  }

  .hero-description {
    font-size: var(--text-sm);
    margin-bottom: var(--spacing-lg);
  }

  .hero-buttons {
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
  }

  .btn {
    padding: 0.75rem 1.5rem;
    font-size: var(--text-sm);
  }

  .social-link {
    width: 40px;
    height: 40px;
    font-size: var(--text-base);
  }

  .image-wrapper {
    max-width: 300px;
  }

  .image-border {
    display: none;
  }

  /* Remove particles on small screens */
  #particles-js {
    display: none;
  }

  /* Section */
  .section {
    padding: var(--spacing-xl) 0;
  }

  .section-header {
    margin-bottom: var(--spacing-xl);
  }

  .section-title {
    font-size: var(--text-2xl);
  }

  .section-subtitle {
    font-size: var(--text-xs);
    letter-spacing: 1px;
  }

  .section-divider {
    width: 50px;
    height: 3px;
  }

  /* About Section */
  .about-content {
    gap: var(--spacing-xl);
  }

  .about-title {
    font-size: var(--text-xl);
  }

  .about-text {
    font-size: var(--text-sm);
  }

  .about-details {
    gap: var(--spacing-sm);
  }

  .detail-item {
    padding: var(--spacing-sm);
  }

  .detail-item i {
    width: 35px;
    height: 35px;
    font-size: var(--text-base);
  }

  .detail-label {
    font-size: var(--text-xs);
  }

  .detail-value {
    font-size: var(--text-sm);
  }

  .experience-badge {
    padding: var(--spacing-sm);
  }

  .experience-badge h3 {
    font-size: var(--text-3xl);
  }

  .experience-badge p {
    font-size: var(--text-xs);
  }

  .decoration-circle {
    display: none;
  }

  /* Services */
  .services-grid {
    gap: var(--spacing-md);
  }

  .service-card {
    padding: var(--spacing-md);
  }

  .service-icon {
    width: 60px;
    height: 60px;
    font-size: var(--text-2xl);
  }

  .service-title {
    font-size: var(--text-lg);
  }

  .service-description {
    font-size: var(--text-sm);
  }

  /* Skills Section */
  .skills-content {
    gap: var(--spacing-lg);
  }

  .skills-category {
    padding: var(--spacing-md);
  }

  .category-title {
    font-size: var(--text-lg);
    margin-bottom: var(--spacing-md);
  }

  .category-title i {
    width: 40px;
    height: 40px;
    font-size: var(--text-lg);
  }

  .skill-item {
    margin-bottom: var(--spacing-md);
  }

  .skill-name {
    font-size: var(--text-sm);
  }

  .skill-percentage {
    font-size: var(--text-xs);
  }

  .skill-bar {
    height: 8px;
  }

  .tech-stack-title {
    font-size: var(--text-xl);
    margin-bottom: var(--spacing-md);
  }

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

  .tech-icon {
    padding: var(--spacing-sm);
  }

  .tech-icon i {
    font-size: var(--text-3xl);
  }

  /* Portfolio Section */
  .portfolio-filter {
    flex-direction: column;
    align-items: stretch;
  }

  .filter-btn {
    width: 100%;
    text-align: center;
  }

  .portfolio-grid {
    gap: var(--spacing-md);
  }

  .portfolio-title {
    font-size: var(--text-lg);
  }

  .portfolio-category {
    font-size: var(--text-sm);
  }

  .portfolio-link {
    width: 40px;
    height: 40px;
    font-size: var(--text-base);
  }

  /* Experience Section */
  .timeline-wrapper {
    gap: var(--spacing-2xl);
  }

  .timeline-heading {
    font-size: var(--text-lg);
    margin-bottom: var(--spacing-md);
  }

  .timeline-heading i {
    width: 40px;
    height: 40px;
    font-size: var(--text-lg);
  }

  .timeline {
    padding-left: var(--spacing-md);
  }

  .timeline::before {
    width: 2px;
  }

  .timeline-item {
    padding-bottom: var(--spacing-lg);
  }

  .timeline-dot {
    left: -24px;
    width: 12px;
    height: 12px;
    border-width: 3px;
  }

  .timeline-date {
    padding: 0.25rem var(--spacing-sm);
    font-size: var(--text-xs);
  }

  .timeline-content {
    padding: var(--spacing-sm);
  }

  .timeline-content h3 {
    font-size: var(--text-base);
  }

  .timeline-content h4 {
    font-size: var(--text-sm);
  }

  .timeline-content p {
    font-size: var(--text-sm);
  }

  /* Testimonials Section */
  .testimonials::before {
    font-size: 10rem;
  }

  .testimonial-card {
    padding: var(--spacing-md);
  }

  .quote-icon {
    width: 45px;
    height: 45px;
    font-size: var(--text-xl);
    margin-bottom: var(--spacing-sm);
  }

  .testimonial-text {
    font-size: var(--text-sm);
    margin-bottom: var(--spacing-sm);
  }

  .testimonial-rating {
    margin-bottom: var(--spacing-sm);
  }

  .testimonial-rating i {
    font-size: var(--text-base);
  }

  .testimonial-author {
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
  }

  .testimonial-author img {
    width: 50px;
    height: 50px;
  }

  .author-info h4 {
    font-size: var(--text-base);
  }

  .author-info p {
    font-size: var(--text-xs);
  }

  .swiper-button-prev,
  .swiper-button-next {
    display: none;
  }

  /* Contact Section */
  .contact-content {
    gap: var(--spacing-xl);
  }

  .contact-info-title {
    font-size: var(--text-xl);
  }

  .contact-info-text {
    font-size: var(--text-sm);
    margin-bottom: var(--spacing-md);
  }

  .contact-details {
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
  }

  .contact-detail-item {
    padding: var(--spacing-sm);
  }

  .contact-icon {
    width: 40px;
    height: 40px;
    font-size: var(--text-lg);
  }

  .contact-detail-info h4 {
    font-size: var(--text-sm);
  }

  .contact-detail-info p {
    font-size: var(--text-sm);
  }

  .contact-social h4 {
    font-size: var(--text-base);
    margin-bottom: var(--spacing-sm);
  }

  .contact-form-wrapper {
    padding: var(--spacing-md);
  }

  .contact-form {
    gap: var(--spacing-md);
  }

  .form-input {
    padding: 0.625rem 0.625rem 0.625rem 40px;
    font-size: var(--text-sm);
  }

  .form-icon {
    left: 0.625rem;
    font-size: var(--text-sm);
  }

  textarea.form-input {
    min-height: 120px;
  }

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

  /* Footer */
  .footer {
    padding: var(--spacing-xl) 0 var(--spacing-sm);
  }

  .footer-content {
    gap: var(--spacing-lg);
    padding-bottom: var(--spacing-xl);
  }

  .footer-logo {
    font-size: var(--text-xl);
  }

  .footer-text {
    font-size: var(--text-sm);
  }

  .footer-social-link {
    width: 40px;
    height: 40px;
    font-size: var(--text-base);
  }

  .footer-title {
    font-size: var(--text-lg);
  }

  .footer-links {
    gap: 0.375rem;
  }

  .footer-links a {
    font-size: var(--text-sm);
  }

  .newsletter-form input {
    padding: 0.625rem var(--spacing-sm);
    font-size: var(--text-sm);
  }

  .newsletter-form button {
    width: 45px;
    height: 45px;
    font-size: var(--text-base);
  }

  .footer-bottom {
    padding-top: var(--spacing-md);
  }

  .footer-bottom p {
    font-size: var(--text-xs);
  }

  /* Scroll Top Button */
  .scroll-top {
    width: 40px;
    height: 40px;
    bottom: 15px;
    right: 15px;
    font-size: var(--text-lg);
  }

  /* Scroll Indicator */
  .scroll-indicator {
    display: none;
  }
}

/* ========================================
   EXTRA SMALL MOBILE (0px - 374px)
======================================== */

@media (max-width: 374px) {
  :root {
    --text-base: 0.875rem;
    --text-lg: 1rem;
    --text-xl: 1.125rem;
    --text-2xl: 1.25rem;
    --text-3xl: 1.5rem;
  }

  .hero-title {
    font-size: var(--text-2xl);
  }

  .section-title {
    font-size: var(--text-xl);
  }

  .btn {
    padding: 0.625rem 1.25rem;
    font-size: var(--text-xs);
  }

  .image-wrapper {
    max-width: 250px;
  }

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

  .service-icon {
    width: 50px;
    height: 50px;
    font-size: var(--text-xl);
  }
}

/* ========================================
   LANDSCAPE ORIENTATION FIX
======================================== */

@media (max-height: 600px) and (orientation: landscape) {
  .hero {
    min-height: auto;
    padding: 100px 0 var(--spacing-xl);
  }

  .scroll-indicator {
    display: none;
  }

  .floating-shapes {
    display: none;
  }
}

/* ========================================
   PRINT STYLES
======================================== */

@media print {
  .navbar,
  .hamburger,
  .theme-toggle,
  .scroll-top,
  .scroll-progress,
  .cursor-dot,
  .cursor-outline,
  .floating-shapes,
  #particles-js,
  .portfolio-filter,
  .swiper-button-prev,
  .swiper-button-next,
  .swiper-pagination,
  .footer-social,
  .newsletter-form {
    display: none !important;
  }

  body {
    font-size: 12pt;
    line-height: 1.5;
    color: #000;
    background: #fff;
  }

  .container {
    max-width: 100%;
    padding: 0;
  }

  .section {
    page-break-inside: avoid;
    padding: 20px 0;
  }

  a {
    color: #000;
    text-decoration: underline;
  }

  .btn {
    border: 1px solid #000;
    background: transparent;
    color: #000;
  }
}

/* ========================================
   ACCESSIBILITY IMPROVEMENTS
======================================== */

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .floating-shapes,
  .shape {
    animation: none !important;
  }

  .skill-progress::before {
    animation: none !important;
  }
}

/* High contrast mode */
@media (prefers-contrast: high) {
  :root {
    --primary-color: #0000ff;
    --text-primary: #000000;
    --text-secondary: #333333;
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f5;
  }

  [data-theme="dark"] {
    --bg-primary: #000000;
    --bg-secondary: #1a1a1a;
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
  }

  .btn,
  .card,
  .service-card,
  .portfolio-item {
    border: 2px solid currentColor;
  }
}

/* Focus visible for keyboard navigation */
@media (prefers-reduced-motion: no-preference) {
  :focus-visible {
    outline: 3px solid var(--primary-color);
    outline-offset: 3px;
  }
}

/* ========================================
   BROWSER-SPECIFIC FIXES
======================================== */

/* Firefox */
@-moz-document url-prefix() {
  .skill-progress {
    animation: none;
  }
}

/* Safari */
@supports (-webkit-appearance: none) {
  .sticky {
    position: -webkit-sticky;
    position: sticky;
  }
}

/* IE11 Fallbacks */
@media screen and (-ms-high-contrast: active), (-ms-high-contrast: none) {
  .portfolio-grid,
  .services-grid,
  .tech-icons {
    display: flex;
    flex-wrap: wrap;
  }

  .portfolio-item,
  .service-card,
  .tech-icon {
    flex: 0 0 calc(33.333% - 20px);
    margin: 10px;
  }
}

/* ========================================
   RETINA DISPLAY OPTIMIZATION
======================================== */

@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  /* Optimize images and icons for retina displays */
  .logo,
  .service-icon,
  .tech-icon i {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }
}

/* ========================================
   DARK MODE SPECIFIC RESPONSIVE FIXES
======================================== */

@media (max-width: 767px) {
  [data-theme="dark"] .nav-menu {
    background: rgba(30, 41, 59, 0.98);
    backdrop-filter: blur(10px);
  }

  [data-theme="dark"] .testimonial-card,
  [data-theme="dark"] .service-card,
  [data-theme="dark"] .contact-form-wrapper {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  }
}

/* ========================================
   UTILITY RESPONSIVE CLASSES
======================================== */

/* Hide on specific breakpoints */
.hide-on-mobile {
  @media (max-width: 767px) {
    display: none !important;
  }
}

.hide-on-tablet {
  @media (min-width: 768px) and (max-width: 991px) {
    display: none !important;
  }
}

.hide-on-desktop {
  @media (min-width: 992px) {
    display: none !important;
  }
}

/* Show on specific breakpoints */
.show-on-mobile {
  display: none !important;
  @media (max-width: 767px) {
    display: block !important;
  }
}

.show-on-tablet {
  display: none !important;
  @media (min-width: 768px) and (max-width: 991px) {
    display: block !important;
  }
}

.show-on-desktop {
  display: none !important;
  @media (min-width: 992px) {
    display: block !important;
  }
}

/* ========================================
   END OF RESPONSIVE STYLESHEET
======================================== */