/* ===================================
   MOBILE RESPONSIVENESS OPTIMIZATIONS
   =================================== */

/* Touch-friendly interaction targets */
:root {
  --touch-target-min: 44px; /* Minimum touch target size */
  --mobile-padding: 1rem;
  --mobile-margin: 0.75rem;
}

/* Enhanced touch targets for mobile */
@media (max-width: 768px) {
  /* Navigation touch targets */
  .nav-toggle {
    min-width: var(--touch-target-min);
    min-height: var(--touch-target-min);
    padding: var(--space-2);
    border-radius: var(--radius-base);
    transition: all var(--transition-fast);
  }
  
  .nav-toggle:hover,
  .nav-toggle:focus {
    background: rgba(0, 102, 255, 0.1);
    transform: scale(1.05);
  }
  
  .nav-mobile-link {
    min-height: var(--touch-target-min);
    padding: var(--space-3) var(--space-4);
    font-size: var(--font-size-lg);
    display: flex;
    align-items: center;
  }
  
  /* Button touch targets */
  .btn,
  .hero-btn,
  .btn-primary,
  .btn-expand {
    min-height: var(--touch-target-min);
    min-width: var(--touch-target-min);
    padding: var(--space-3) var(--space-4);
    font-size: var(--font-size-base);
  }
  
  /* Social links touch targets */
  .social-link {
    min-width: var(--touch-target-min);
    min-height: var(--touch-target-min);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-base);
    transition: all var(--transition-fast);
  }
  
  .social-link:hover {
    transform: scale(1.1);
    background: rgba(0, 102, 255, 0.1);
  }
  
  /* Contact card links */
  .contact-link {
    min-height: var(--touch-target-min);
    display: flex;
    align-items: center;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-base);
    transition: all var(--transition-fast);
  }
  
  .contact-link:hover {
    background: rgba(0, 102, 255, 0.05);
    transform: translateY(-1px);
  }
}

/* Mobile-specific layout optimizations */
@media (max-width: 768px) {
  /* Container adjustments */
  .container {
    padding-left: var(--mobile-padding);
    padding-right: var(--mobile-padding);
  }
  
  /* Hero section mobile optimization */
  .hero {
    min-height: 100vh;
    padding: var(--space-4) 0;
  }
  
  .hero-container {
    padding: 0 var(--mobile-padding);
  }
  
  .hero-title {
    font-size: clamp(2.5rem, 12vw, 5rem);
    line-height: 1.1;
    margin-bottom: var(--space-3);
  }
  
  .hero-subtitle {
    font-size: clamp(1.25rem, 6vw, 2.5rem);
    margin-bottom: var(--space-4);
  }
  
  .hero-roles {
    flex-direction: column;
    gap: var(--space-1);
    text-align: center;
    margin-bottom: var(--space-6);
  }
  
  .hero-divider {
    display: none;
  }
  
  .hero-btn {
    padding: var(--space-3) var(--space-6);
    font-size: var(--font-size-lg);
    width: auto;
    min-width: 200px;
  }
  
  /* Experience timeline mobile optimization */
  .timeline-container {
    padding-left: var(--space-2);
    border-left-width: 2px;
  }
  
  .experience-content {
    margin-bottom: var(--space-4);
    padding: var(--space-4);
    border-radius: var(--radius-lg);
  }
  
  .experience-date-header {
    font-size: var(--font-size-base);
    margin-bottom: var(--space-2);
  }
  
  .experience-title {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-1);
  }
  
  .experience-company {
    font-size: var(--font-size-base);
    margin-bottom: var(--space-2);
  }
  
  .experience-summary {
    font-size: var(--font-size-sm);
    line-height: var(--line-height-relaxed);
  }
  
  /* Philosophy cards mobile optimization */
  .philosophy-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
    padding: 0 var(--mobile-padding);
  }
  
  .philosophy-card {
    padding: var(--space-4);
    text-align: center;
  }
  
  .philosophy-card-icon {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--space-3);
  }
  
  .philosophy-card-title {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-2);
  }
  
  .philosophy-card-description {
    font-size: var(--font-size-sm);
    line-height: var(--line-height-relaxed);
  }
  
  /* Skills section mobile optimization */
  .skills-grid {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }
  
  .skill-card {
    padding: var(--space-3);
    text-align: center;
  }
  
  /* Contact section mobile optimization */
  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
    text-align: center;
  }
  
  .contact-card {
    padding: var(--space-4);
  }
  
  .social-links {
    justify-content: center;
    gap: var(--space-4);
    margin: var(--space-6) 0;
  }
  
  .resume-download {
    text-align: center;
    margin-top: var(--space-6);
  }
  
  .btn-download {
    width: 100%;
    max-width: 300px;
    justify-content: center;
  }
}

/* Small mobile devices (480px and below) */
@media (max-width: 480px) {
  :root {
    --mobile-padding: 0.75rem;
    --mobile-margin: 0.5rem;
  }
  
  /* Navigation adjustments */
  .nav-container {
    padding: 0 var(--mobile-padding);
  }
  
  .nav-logo {
    font-size: var(--font-size-lg);
  }
  
  .nav-mobile {
    width: 100%;
    padding: var(--space-6) var(--mobile-padding);
  }
  
  /* Hero section for small screens */
  .hero-title {
    font-size: clamp(2rem, 15vw, 4rem);
  }
  
  .hero-subtitle {
    font-size: clamp(1rem, 8vw, 2rem);
  }
  
  .hero-roles {
    font-size: var(--font-size-sm);
  }
  
  .hero-btn {
    padding: var(--space-2) var(--space-4);
    font-size: var(--font-size-base);
    min-width: 180px;
  }
  
  /* Content sections */
  .container {
    padding-left: var(--mobile-padding);
    padding-right: var(--mobile-padding);
  }
  
  /* Section headers */
  .header h3,
  .experience.header h3,
  .highlights.header h3,
  .philosophy.header h3,
  .skills.header h3,
  .contact.header h3 {
    font-size: var(--font-size-2xl);
    text-align: center;
    margin-bottom: var(--space-4);
  }
  
  /* Experience cards */
  .experience-content {
    padding: var(--space-3);
    margin-bottom: var(--space-3);
  }
  
  /* Philosophy cards */
  .philosophy-card {
    padding: var(--space-3);
  }
  
  .philosophy-card-icon {
    font-size: var(--font-size-2xl);
  }
  
  /* Contact cards */
  .contact-card {
    padding: var(--space-3);
  }
  
  .contact-icon {
    font-size: var(--font-size-2xl);
  }
}

/* Mobile-specific animations and transitions */
@media (max-width: 768px) {
  /* Reduce motion for better performance on mobile */
  .floating-element {
    display: none;
  }
  
  /* Optimize animations for mobile */
  .card:hover {
    transform: translateY(-1px);
  }
  
  .btn:hover,
  .hero-btn:hover {
    transform: translateY(-1px);
  }
  
  /* Touch feedback animations */
  .btn:active,
  .hero-btn:active,
  .nav-mobile-link:active,
  .contact-link:active {
    transform: scale(0.98);
    transition: transform 0.1s ease-out;
  }
  
  /* Scroll animations with reduced motion */
  @media (prefers-reduced-motion: no-preference) {
    .scroll-reveal {
      opacity: 0;
      transform: translateY(20px);
      transition: all 0.6s ease-out;
    }
    
    .scroll-reveal.revealed {
      opacity: 1;
      transform: translateY(0);
    }
  }
}

/* Landscape orientation optimizations */
@media (max-width: 768px) and (orientation: landscape) {
  .hero {
    min-height: 100vh;
    padding: var(--space-2) 0;
  }
  
  .hero-title {
    font-size: clamp(2rem, 8vw, 3.5rem);
  }
  
  .hero-subtitle {
    font-size: clamp(1rem, 4vw, 1.5rem);
  }
  
  .hero-roles {
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--space-1);
  }
  
  .hero-divider {
    display: inline;
  }
}

/* High DPI displays optimization */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  /* Ensure crisp rendering on high DPI screens */
  .nav-toggle-line,
  .scroll-progress,
  .hero-emphasis::after {
    transform: translateZ(0);
    -webkit-font-smoothing: antialiased;
  }
}

/* Focus management for mobile accessibility */
@media (max-width: 768px) {
  /* Enhanced focus styles for touch devices */
  .nav-toggle:focus,
  .btn:focus,
  .nav-mobile-link:focus,
  .contact-link:focus,
  .social-link:focus {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
    box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.2);
  }
  
  /* Remove hover effects on touch devices */
  @media (hover: none) {
    .card:hover,
    .btn:hover,
    .nav-link:hover,
    .social-link:hover {
      transform: none;
      box-shadow: var(--shadow-base);
    }
  }
}

/* Mobile-specific utility classes */
@media (max-width: 768px) {
  .mobile-hidden {
    display: none !important;
  }
  
  .mobile-visible {
    display: block !important;
  }
  
  .mobile-center {
    text-align: center !important;
  }
  
  .mobile-full-width {
    width: 100% !important;
  }
  
  .mobile-no-margin {
    margin: 0 !important;
  }
  
  .mobile-small-padding {
    padding: var(--space-2) !important;
  }
}

/* Performance optimizations for mobile */
@media (max-width: 768px) {
  /* Optimize images for mobile */
  img {
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
  }
  
  /* Reduce backdrop blur on mobile for better performance */
  .glass,
  .main-nav {
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
  }
  
  /* Optimize gradients for mobile */
  .gradient-mesh {
    background: 
      radial-gradient(circle at 20% 80%, rgba(255, 107, 53, 0.2) 0%, transparent 40%),
      radial-gradient(circle at 80% 20%, rgba(108, 92, 231, 0.2) 0%, transparent 40%);
  }
}

/* Safe area handling for devices with notches */
@supports (padding: max(0px)) {
  .main-nav {
    padding-left: max(var(--space-4), env(safe-area-inset-left));
    padding-right: max(var(--space-4), env(safe-area-inset-right));
  }
  
  .nav-container {
    padding-left: max(var(--space-4), env(safe-area-inset-left));
    padding-right: max(var(--space-4), env(safe-area-inset-right));
  }
  
  .hero-container {
    padding-left: max(var(--mobile-padding), env(safe-area-inset-left));
    padding-right: max(var(--mobile-padding), env(safe-area-inset-right));
  }
}