/* Responsive Design - Mobile First Approach */

/* Tablet: 768px - 1023px */
@media (max-width: 1023px) {
  .sidebar {
    width: 280px;
  }
  
  .main-content {
    margin-left: 280px;
    max-width: calc(100% - 280px);
  }
  
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--space-6);
  }
  
  .footer-right {
    align-items: center;
  }
  
  .hero-cta {
    gap: var(--space-3);
  }
  
  .hero-stats {
    gap: var(--space-8);
  }
  
  .section {
    padding: var(--space-16) 0;
  }
  
  .container {
    padding: 0 var(--space-5);
  }
}

/* Mobile: < 768px */
@media (max-width: 767px) {
  /* Show mobile header */
  .mobile-header {
    display: block;
  }
  
  /* Sidebar becomes drawer */
  .sidebar {
    position: fixed;
    top: 0;
    left: -100%;
    width: 280px;
    height: 100vh;
    z-index: 9999;
    transition: left var(--transition-base);
  }
  
  .sidebar.active {
    left: 0;
  }
  
  /* Main content full width */
  .main-content {
    margin-left: 0;
    max-width: 100%;
    padding-top: 60px; /* Account for fixed header */
  }
  
  /* Mobile overlay */
  .mobile-overlay.active {
    opacity: 1;
    visibility: visible;
  }
  
  /* Hero adjustments */
  .hero {
    min-height: 70vh;
    padding: var(--space-12) 0;
  }
  
  .hero-content {
    padding: 0 var(--space-4);
  }
  
  .hero-name {
    font-size: var(--text-3xl);
  }
  
  .hero-title {
    font-size: var(--text-xl);
  }
  
  .hero-tagline {
    font-size: var(--text-base);
    margin-bottom: var(--space-8);
  }
  
  .hero-cta {
    flex-direction: column;
    gap: var(--space-3);
    margin-bottom: var(--space-12);
  }
  
  .hero-cta .btn {
    width: 100%;
    max-width: 300px;
  }
  
  .hero-stats {
    flex-direction: column;
    gap: var(--space-4);
  }
  
  .stat {
    padding: var(--space-4);
    background-color: var(--bg-secondary);
    border-radius: var(--radius-base);
    min-width: 120px;
  }
  
  /* Single column layouts */
  .two-column-layout {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--space-6);
  }
  
  .footer-right {
    align-items: center;
  }
  
  /* Typography adjustments */
  .section {
    padding: var(--space-12) 0;
  }
  
  .section-title {
    font-size: var(--text-2xl);
  }
  
  .container {
    padding: 0 var(--space-4);
  }
  
  /* Experience timeline adjustments */
  .experience-timeline::before {
    left: 20px;
  }
  
  .experience-card::before {
    left: -30px;
    width: 16px;
    height: 16px;
  }
  
  .experience-card {
    padding: var(--space-6);
    margin-left: var(--space-8);
  }
  
  /* Education timeline adjustments */
  .education-timeline::before {
    left: 20px;
  }
  
  .education-item::before {
    left: -30px;
    width: 16px;
    height: 16px;
  }
  
  .education-item {
    padding: var(--space-6);
    margin-left: var(--space-8);
    flex-direction: column;
    text-align: center;
  }
  
  /* Project filters */
  .project-filters {
    gap: var(--space-2);
  }
  
  .filter-btn {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
  }
  
  /* Contact form adjustments */
  .contact-form-container,
  .contact-info-container {
    padding: var(--space-6);
  }
  
  .contact-methods {
    gap: var(--space-3);
  }
  
  .contact-method {
    padding: var(--space-3);
  }
  
  /* Skills adjustments */
  .skills-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
  
  .tools-domains {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
}

/* Small mobile: < 480px */
@media (max-width: 479px) {
  .container {
    padding: 0 var(--space-4);
  }
  
  .hero-content {
    padding: 0 var(--space-3);
  }
  
  .hero-name {
    font-size: var(--text-2xl);
  }
  
  .hero-title {
    font-size: var(--text-lg);
  }
  
  .greeting {
    font-size: var(--text-lg);
  }
  
  .section {
    padding: var(--space-10) 0;
  }
  
  .section-title {
    font-size: var(--text-xl);
  }
  
  .experience-card {
    padding: var(--space-4);
    margin-left: var(--space-6);
  }
  
  .education-item {
    padding: var(--space-4);
    margin-left: var(--space-6);
  }
  
  .project-content {
    padding: var(--space-4);
  }
  
  .project-title {
    font-size: var(--text-lg);
  }
  
  .project-image {
    height: 160px;
  }
  
  .filter-btn {
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-xs);
  }
  
  .contact-form-container,
  .contact-info-container {
    padding: var(--space-4);
  }
  
  .contact-form {
    gap: var(--space-4);
  }
  
  .form-group input,
  .form-group textarea {
    padding: var(--space-2) var(--space-3);
  }
  
  .contact-method {
    flex-direction: column;
    text-align: center;
    gap: var(--space-2);
  }
  
  .method-icon {
    margin: 0 auto;
  }
  
  .social-btn {
    justify-content: center;
  }
  
  .certification-item {
    flex-direction: column;
    text-align: center;
    padding: var(--space-3);
  }
  
  .cert-icon {
    width: 40px;
    height: 40px;
    margin: 0 auto var(--space-3);
  }
  
  .cert-icon svg {
    width: 24px;
    height: 24px;
  }
  
  .btn {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
    min-height: 40px;
  }
  
  .btn-group {
    flex-direction: column;
  }
  
  .btn-group .btn {
    border-radius: var(--radius-base);
    border: 2px solid var(--primary-color);
  }
  
  .btn-group .btn:not(:first-child) {
    border-top: none;
  }
}

/* Landscape mobile adjustments */
@media (max-width: 767px) and (orientation: landscape) {
  .hero {
    min-height: 60vh;
    padding: var(--space-8) 0;
  }
  
  .hero-stats {
    flex-direction: row;
    gap: var(--space-6);
  }
  
  .section {
    padding: var(--space-8) 0;
  }
}

/* Large screens: > 1440px */
@media (min-width: 1441px) {
  .container {
    max-width: 1400px;
  }
  
  .sidebar {
    max-width: 450px;
  }
  
  .main-content {
    margin-left: 450px;
    max-width: calc(100% - 450px);
  }
  
  .hero-content {
    max-width: 900px;
  }
  
  .projects-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Ultra-wide screens: > 1920px */
@media (min-width: 1921px) {
  .container {
    max-width: 1600px;
  }
  
  .projects-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Print styles */
@media print {
  .mobile-header,
  .sidebar,
  .mobile-overlay,
  .hero-cta,
  .project-filters,
  .contact-form-container,
  .footer {
    display: none !important;
  }
  
  .main-content {
    margin-left: 0;
    max-width: 100%;
  }
  
  .section {
    padding: var(--space-8) 0;
    break-inside: avoid;
  }
  
  .experience-card,
  .project-card,
  .education-item {
    break-inside: avoid;
    margin-bottom: var(--space-6);
  }
  
  .hero {
    min-height: auto;
    padding: var(--space-8) 0;
  }
  
  .hero-name {
    font-size: var(--text-2xl);
  }
  
  .hero-title {
    font-size: var(--text-lg);
  }
  
  .hero-tagline {
    font-size: var(--text-base);
  }
  
  * {
    color: black !important;
    background: white !important;
  }
}

/* High contrast mode */
@media (prefers-contrast: high) {
  .sidebar {
    border-right-width: 2px;
  }
  
  .experience-card,
  .project-card,
  .education-item,
  .certification-item {
    border-width: 2px;
  }
  
  .btn {
    border-width: 3px;
  }
  
  .form-group input,
  .form-group textarea {
    border-width: 3px;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .sidebar {
    transition: none;
  }
  
  .mobile-overlay {
    transition: none;
  }
  
  .hero-content > * {
    animation: none;
    opacity: 1;
    transform: none;
  }
  
  .experience-card,
  .project-card,
  .education-item,
  .certification-item {
    animation: none;
    opacity: 1;
    transform: none;
  }
  
  .skill-fill {
    transition: none;
  }
  
  .btn::before {
    display: none;
  }
  
  .btn:hover {
    transform: none;
  }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #111827;
    --bg-secondary: #1f2937;
    --bg-tertiary: #374151;
    --text-primary: #f9fafb;
    --text-secondary: #d1d5db;
    --text-tertiary: #9ca3af;
    --border-color: #374151;
  }
  
  .hero {
    background: linear-gradient(135deg, #1f2937 0%, #111827 100%);
  }
  
  .mobile-header {
    background-color: var(--bg-primary);
    border-bottom-color: var(--border-color);
  }
}