/**
 * ==================================================
 * Responsive Breakpoints
 * Mobile-First Design - Enhanced
 * ==================================================
 */

/* ================================
   Base Navigation Menu
   ================================ */
.main-nav {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  display: flex;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s cubic-bezier(0.16, 1, 0.3, 1),
    visibility 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.nav-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.nav-content {
  position: relative;
  width: 100%;
  max-width: 400px;
  margin-right: auto;
  background: var(--color-bg);
  border-left: 1px solid var(--color-border);
  transform: translateX(100%);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  overflow-y: auto;
  overscroll-behavior: contain;
}

.main-nav.active .nav-content {
  transform: translateX(0);
}

.nav-inner {
  padding: calc(var(--header-height) + var(--space-8)) var(--space-6)
    var(--space-8);
  min-height: 100%;
}

.nav-menu {
  margin-bottom: var(--space-8);
}

.nav-item {
  border-bottom: 1px solid var(--color-border);
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
  padding: var(--space-4) 0;
  background: transparent;
  border: none;
  font-size: var(--font-size-lg);
  font-weight: 500;
  color: var(--color-text);
  text-align: right;
  cursor: pointer;
  transition: color 0.3s ease, transform 0.3s ease;
}

.nav-link:hover {
  color: var(--color-primary);
  transform: translateX(-5px);
}

.nav-icon {
  font-size: 1.2em;
}

.nav-arrow {
  width: 20px;
  height: 20px;
  margin-right: auto;
  transition: transform var(--transition-normal);
}

.nav-arrow svg {
  width: 100%;
  height: 100%;
}

.nav-submenu-toggle[aria-expanded="true"] .nav-arrow {
  transform: rotate(180deg);
}

/* Submenu */
.nav-submenu {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal);
}

.nav-submenu-toggle[aria-expanded="true"] + .nav-submenu {
  max-height: 500px;
}

.nav-submenu-item {
  border-bottom: 1px solid var(--color-border);
}

.nav-submenu-item:last-child {
  border-bottom: none;
}

.nav-submenu-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.nav-submenu-link:hover {
  color: var(--color-primary);
  background: var(--color-surface);
}

/* Badge with Pulse */
.nav-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 24px;
  height: 24px;
  padding: 0 var(--space-2);
  background: var(--badge-color, var(--color-primary));
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: #fff;
  margin-right: auto;
}

.nav-badge.pulse {
  position: relative;
}

.nav-badge.pulse::before {
  content: "";
  position: absolute;
  inset: 0;
  background: inherit;
  border-radius: inherit;
  animation: badge-pulse 2s ease-in-out infinite;
  z-index: -1;
}

@keyframes badge-pulse {
  0%,
  100% {
    transform: scale(1);
    opacity: 0.5;
  }
  50% {
    transform: scale(1.5);
    opacity: 0;
  }
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--color-text-muted);
  margin-right: auto;
}

.status-dot.active {
  background: var(--color-neon-green);
  animation: status-pulse 1.5s ease-in-out infinite;
}

/* Nav Contact & Social */
.nav-contact {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
  padding: var(--space-4);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
}

.nav-contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.nav-contact-item a {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: inherit;
}

.nav-contact-item a:hover {
  color: var(--color-primary);
}

.nav-social {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
}

.nav-social-link {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text);
  transition: all var(--transition-normal);
}

.nav-social-link svg {
  width: 20px;
  height: 20px;
}

.nav-social-link:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

/* ================================
   RESPONSIVE BREAKPOINTS
   ================================ */

/* Small devices (landscape phones, 576px and up) */
@media (min-width: 576px) {
  :root {
    --container-padding: var(--space-6);
  }

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

/* Medium devices (tablets, 768px and up) */
@media (min-width: 768px) {
  :root {
    --container-padding: var(--space-8);
  }

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

  .hero-container {
    flex-direction: row;
    text-align: right;
    gap: var(--space-12);
  }

  .hero-content {
    align-items: flex-start;
  }

  .hero-stats {
    justify-content: flex-start;
  }

  .hero-actions {
    justify-content: flex-start;
  }

  .hero-contact {
    justify-content: flex-start;
  }

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

/* Large devices (desktops, 992px and up) */
@media (min-width: 992px) {
  .portfolio-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

/* Extra large devices (large desktops, 1200px and up) */
@media (min-width: 1200px) {
  .portfolio-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Mobile Specific */
@media (max-width: 575px) {
  :root {
    --font-size-5xl: 2.25rem;
    --font-size-4xl: 1.875rem;
    --font-size-3xl: 1.5rem;
  }

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

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

  .hero-stat {
    width: 100%;
  }

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

  .hero-actions .btn {
    width: 100%;
  }

  .hero-contact {
    flex-direction: column;
    gap: var(--space-2);
  }

  .contact-divider {
    display: none;
  }

  .portfolio-filters {
    overflow-x: auto;
    flex-wrap: nowrap;
    justify-content: flex-start;
    padding-bottom: var(--space-4);
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
  }

  .portfolio-filters::-webkit-scrollbar {
    display: none;
  }

  .filter-btn {
    flex-shrink: 0;
  }

  .portfolio-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .lightbox-nav {
    display: none;
  }

  .lightbox-container {
    margin: var(--space-2);
  }

  /* Contact form on mobile */
  .contact-wrapper {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  /* Section padding on mobile */
  .portfolio-section,
  .contact-section {
    padding: var(--space-12) 0;
  }

  /* Smooth touch scrolling */
  .scroll-container {
    -webkit-overflow-scrolling: touch;
    scroll-behavior: smooth;
  }

  /* Touch-friendly tap targets */
  .btn,
  .filter-btn,
  .nav-link,
  a {
    min-height: 44px;
    min-width: 44px;
  }

  /* Mobile animations - reduced for performance */
  [data-animate] {
    transition-duration: 0.5s;
  }

  /* Prevent horizontal scroll */
  html,
  body {
    overflow-x: hidden;
    max-width: 100vw;
  }
}

/* ================================
   Tablet Specific (576px - 991px)
   ================================ */
@media (min-width: 576px) and (max-width: 991px) {
  .nav-content {
    max-width: 350px;
  }

  /* Two-column layout for cards */
  .portfolio-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-5);
  }

  /* Better spacing for tablet */
  .section-container {
    padding: var(--space-16) var(--space-6);
  }

  .hero-container {
    gap: var(--space-10);
  }
}

/* ================================
   Desktop Navigation Enhancement
   ================================ */
@media (min-width: 992px) {
  .nav-content {
    max-width: 450px;
  }

  /* Desktop hover effects */
  .portfolio-item:hover {
    transform: translateY(-10px) scale(1.02);
  }

  /* Larger section spacing on desktop */
  .section-container {
    padding: var(--space-24) var(--container-padding);
  }
}

/* ================================
   Large Desktop (1400px+)
   ================================ */
@media (min-width: 1400px) {
  :root {
    --container-max: 1400px;
  }

  .portfolio-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
  }
}

/* ================================
   Ultra Wide Screens (1920px+)
   ================================ */
@media (min-width: 1920px) {
  html {
    font-size: 18px;
  }

  :root {
    --container-max: 1600px;
  }
}

/* ================================
   Landscape Mobile
   ================================ */
@media (max-width: 991px) and (orientation: landscape) {
  .hero-section {
    min-height: auto;
    padding: var(--space-16) 0;
  }

  .hero-container {
    flex-direction: row;
    gap: var(--space-8);
  }

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

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

/* ================================
   Dark Mode System Preference
   ================================ */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
  }
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    color-scheme: light;
  }
}

/* ================================
   Reduce Animations Preference
   ================================ */
.reduce-animations * {
  animation-duration: 0.1ms !important;
  transition-duration: 0.1ms !important;
}

/* ================================
   Print Styles
   ================================ */
@media print {
  .site-header,
  .main-nav,
  .back-to-top,
  .theme-toggle,
  .menu-toggle,
  .scroll-indicator,
  .scroll-progress,
  .preloader {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }

  .section-container {
    padding: 20px 0;
  }

  a[href]::after {
    content: " (" attr(href) ")";
  }
}