/*
 * Comprehensive Responsive Design System
 * Mobile-first responsive design with touch-friendly interactions
 * Optimized for all device types and orientations
 * Requirements: 2.1, 2.2, 2.3, 2.4
 */

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

/* Mobile-first approach with enhanced breakpoints */
:root {
  /* Enhanced breakpoint system */
  --breakpoint-xs: 320px;   /* Extra small phones */
  --breakpoint-sm: 576px;   /* Small phones */
  --breakpoint-md: 768px;   /* Tablets */
  --breakpoint-lg: 992px;   /* Small laptops */
  --breakpoint-xl: 1200px;  /* Desktops */
  --breakpoint-2xl: 1400px; /* Large desktops */
  --breakpoint-3xl: 1600px; /* Ultra-wide screens */
  
  /* Container responsive widths */
  --container-xs: 100%;
  --container-sm: 540px;
  --container-md: 720px;
  --container-lg: 960px;
  --container-xl: 1140px;
  --container-2xl: 1320px;
  --container-3xl: 1500px;
  
  /* Responsive spacing scale */
  --space-responsive-xs: clamp(0.5rem, 2vw, 1rem);
  --space-responsive-sm: clamp(1rem, 3vw, 1.5rem);
  --space-responsive-md: clamp(1.5rem, 4vw, 2.5rem);
  --space-responsive-lg: clamp(2rem, 5vw, 4rem);
  --space-responsive-xl: clamp(3rem, 6vw, 6rem);
  
  /* Touch target sizes */
  --touch-target-min: 44px;
  --touch-target-comfortable: 48px;
  --touch-target-large: 56px;
  
  /* Responsive font scaling */
  --font-scale-mobile: 0.9;
  --font-scale-tablet: 1.0;
  --font-scale-desktop: 1.1;
  --font-scale-large: 1.2;
}

/* ===== ENHANCED CONTAINER SYSTEM ===== */

.responsive-container {
  width: 100%;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
  transition: padding var(--duration-normal) var(--ease-out);
}

/* Progressive container sizing */
@media (min-width: 320px) {
  .responsive-container {
    padding-left: var(--space-3);
    padding-right: var(--space-3);
  }
}

@media (min-width: 576px) {
  .responsive-container {
    max-width: var(--container-sm);
    padding-left: var(--space-4);
    padding-right: var(--space-4);
  }
}

@media (min-width: 768px) {
  .responsive-container {
    max-width: var(--container-md);
    padding-left: var(--space-6);
    padding-right: var(--space-6);
  }
}

@media (min-width: 992px) {
  .responsive-container {
    max-width: var(--container-lg);
    padding-left: var(--space-8);
    padding-right: var(--space-8);
  }
}

@media (min-width: 1200px) {
  .responsive-container {
    max-width: var(--container-xl);
  }
}

@media (min-width: 1400px) {
  .responsive-container {
    max-width: var(--container-2xl);
  }
}

@media (min-width: 1600px) {
  .responsive-container {
    max-width: var(--container-3xl);
  }
}

/* ===== RESPONSIVE GRID ENHANCEMENTS ===== */

.responsive-grid {
  display: grid;
  gap: var(--space-responsive-sm);
  grid-template-columns: 1fr;
  transition: gap var(--duration-normal) var(--ease-out);
}

/* Mobile-first grid progression */
@media (min-width: 576px) {
  .responsive-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-responsive-md);
  }
}

@media (min-width: 768px) {
  .responsive-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-responsive-lg);
  }
}

@media (min-width: 992px) {
  .responsive-grid {
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  }
}

@media (min-width: 1200px) {
  .responsive-grid {
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  }
}

/* ===== TOUCH-FRIENDLY INTERACTIONS ===== */

/* Enhanced touch targets */
.touch-target {
  min-height: var(--touch-target-min);
  min-width: var(--touch-target-min);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
}

.touch-target-comfortable {
  min-height: var(--touch-target-comfortable);
  min-width: var(--touch-target-comfortable);
}

.touch-target-large {
  min-height: var(--touch-target-large);
  min-width: var(--touch-target-large);
}

/* Touch feedback effects */
.touch-feedback {
  position: relative;
  overflow: hidden;
}

.touch-feedback::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(108, 92, 231, 0.2);
  transform: translate(-50%, -50%);
  transition: width 0.3s ease-out, height 0.3s ease-out;
  pointer-events: none;
  z-index: 1;
}

.touch-feedback:active::after {
  width: 200px;
  height: 200px;
}

/* Touch device specific styles */
@media (hover: none) and (pointer: coarse) {
  /* Increase touch targets on touch devices */
  .navigation-card {
    min-height: var(--touch-target-large);
    padding: var(--space-6) var(--space-4);
  }
  
  .navigation-card-icon {
    width: 64px;
    height: 64px;
  }
  
  /* Improve text readability on touch devices */
  .navigation-card-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
  }
  
  .navigation-card-description {
    font-size: var(--font-size-base);
    line-height: var(--line-height-relaxed);
  }
  
  /* Remove hover effects and replace with active states */
  .navigation-card:hover {
    transform: none;
    background: var(--glass-bg);
    box-shadow: var(--shadow-lg);
  }
  
  .navigation-card:active {
    transform: scale(0.98);
    background: var(--glass-bg-light);
    transition-duration: var(--duration-fast);
  }
  
  /* Enhanced footer touch targets */
  .ec-footerNavi__link a {
    min-height: var(--touch-target-min);
    padding: var(--space-4) var(--space-6);
  }
  
  .ec-footerTitle__logo a {
    min-height: var(--touch-target-min);
    padding: var(--space-2) var(--space-4);
  }
}

/* ===== ORIENTATION-SPECIFIC STYLES ===== */

/* Portrait orientation optimizations */
@media (orientation: portrait) {
  .hero-section {
    min-height: 80vh;
    padding: var(--space-8) var(--space-4);
  }
  
  .hero-content {
    max-width: 90%;
  }
  
  .navigation-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
  }
  
  .navigation-card {
    padding: var(--space-8) var(--space-6);
  }
}

/* Landscape orientation optimizations */
@media (orientation: landscape) {
  .hero-section {
    min-height: 100vh;
    padding: var(--space-4) var(--space-6);
  }
  
  .hero-content {
    max-width: 70%;
  }
  
  .navigation-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    max-width: 800px;
  }
  
  .navigation-card {
    padding: var(--space-6) var(--space-5);
  }
}

/* Mobile landscape specific adjustments */
@media (max-height: 500px) and (orientation: landscape) {
  .hero-section {
    min-height: 100vh;
    padding: var(--space-2) var(--space-4);
  }
  
  .hero-content {
    padding: var(--space-4) var(--space-2);
  }
  
  .hero-title {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-2);
  }
  
  .hero-subtitle {
    font-size: var(--font-size-base);
    margin-bottom: var(--space-3);
  }
  
  .hero-description {
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-4);
  }
  
  .navigation-section {
    padding: var(--space-8) var(--space-4);
  }
  
  .navigation-card {
    padding: var(--space-4) var(--space-3);
  }
  
  .navigation-card-icon {
    width: 48px;
    height: 48px;
    margin-bottom: var(--space-3);
  }
}

/* ===== DEVICE-SPECIFIC OPTIMIZATIONS ===== */

/* Extra small devices (portrait phones, less than 576px) */
@media (max-width: 575.98px) {
  :root {
    --font-scale: var(--font-scale-mobile);
  }
  
  .hero-section {
    min-height: 70vh;
    padding: var(--space-6) var(--space-3);
  }
  
  .hero-title {
    font-size: clamp(1.5rem, 6vw, 2.5rem);
    line-height: 1.2;
    margin-bottom: var(--space-3);
  }
  
  .hero-subtitle {
    font-size: clamp(1rem, 4vw, 1.25rem);
    margin-bottom: var(--space-4);
  }
  
  .hero-description {
    font-size: clamp(0.875rem, 3vw, 1rem);
    margin-bottom: var(--space-5);
  }
  
  .navigation-section {
    padding: var(--space-8) var(--space-2);
  }
  
  .navigation-grid {
    gap: var(--space-4);
    max-width: 100%;
  }
  
  .navigation-card {
    padding: var(--space-5) var(--space-4);
    border-radius: var(--radius-lg);
  }
  
  .navigation-card-icon {
    width: 56px;
    height: 56px;
    margin-bottom: var(--space-3);
  }
  
  .navigation-card-title {
    font-size: var(--font-size-base);
    margin-bottom: var(--space-2);
  }
  
  .navigation-card-description {
    font-size: var(--font-size-sm);
  }
}

/* Small devices (landscape phones, 576px and up) */
@media (min-width: 576px) and (max-width: 767.98px) {
  .hero-section {
    min-height: 75vh;
  }
  
  .navigation-grid {
    grid-template-columns: 1fr;
    max-width: 500px;
    gap: var(--space-5);
  }
  
  .navigation-card {
    padding: var(--space-6) var(--space-5);
  }
}

/* Medium devices (tablets, 768px and up) */
@media (min-width: 768px) and (max-width: 991.98px) {
  :root {
    --font-scale: var(--font-scale-tablet);
  }
  
  .hero-section {
    min-height: 80vh;
  }
  
  .navigation-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    max-width: 700px;
    gap: var(--space-6);
  }
  
  .navigation-card {
    padding: var(--space-7) var(--space-5);
  }
  
  .navigation-card-icon {
    width: 72px;
    height: 72px;
  }
}

/* Large devices (desktops, 992px and up) */
@media (min-width: 992px) and (max-width: 1199.98px) {
  :root {
    --font-scale: var(--font-scale-desktop);
  }
  
  .hero-section {
    min-height: 90vh;
  }
  
  .navigation-grid {
    grid-template-columns: repeat(2, 1fr);
    max-width: 800px;
    gap: var(--space-8);
  }
  
  .navigation-card {
    padding: var(--space-8) var(--space-6);
  }
  
  .navigation-card-icon {
    width: 80px;
    height: 80px;
  }
}

/* Extra large devices (large desktops, 1200px and up) */
@media (min-width: 1200px) {
  :root {
    --font-scale: var(--font-scale-large);
  }
  
  .hero-section {
    min-height: 100vh;
  }
  
  .navigation-grid {
    grid-template-columns: repeat(2, 1fr);
    max-width: 900px;
    gap: var(--space-10);
  }
  
  .navigation-card {
    padding: var(--space-10) var(--space-8);
  }
  
  .navigation-card-icon {
    width: 88px;
    height: 88px;
  }
}

/* ===== RESPONSIVE TYPOGRAPHY SYSTEM ===== */

.responsive-text {
  font-size: calc(var(--font-size-base) * var(--font-scale, 1));
  line-height: var(--line-height-normal);
  transition: font-size var(--duration-normal) var(--ease-out);
}

.responsive-heading-1 {
  font-size: calc(var(--font-size-4xl) * var(--font-scale, 1));
  line-height: var(--line-height-tight);
  font-weight: var(--font-weight-extrabold);
}

.responsive-heading-2 {
  font-size: calc(var(--font-size-3xl) * var(--font-scale, 1));
  line-height: var(--line-height-tight);
  font-weight: var(--font-weight-bold);
}

.responsive-heading-3 {
  font-size: calc(var(--font-size-2xl) * var(--font-scale, 1));
  line-height: var(--line-height-snug);
  font-weight: var(--font-weight-semibold);
}

/* ===== RESPONSIVE SPACING UTILITIES ===== */

.responsive-padding {
  padding: var(--space-responsive-sm);
}

.responsive-padding-x {
  padding-left: var(--space-responsive-sm);
  padding-right: var(--space-responsive-sm);
}

.responsive-padding-y {
  padding-top: var(--space-responsive-sm);
  padding-bottom: var(--space-responsive-sm);
}

.responsive-margin {
  margin: var(--space-responsive-sm);
}

.responsive-margin-x {
  margin-left: var(--space-responsive-sm);
  margin-right: var(--space-responsive-sm);
}

.responsive-margin-y {
  margin-top: var(--space-responsive-sm);
  margin-bottom: var(--space-responsive-sm);
}

/* ===== RESPONSIVE VISIBILITY UTILITIES ===== */

/* Hide on mobile */
.hidden-xs { display: none; }
@media (min-width: 576px) { .hidden-xs { display: initial; } }

/* Hide on small devices */
.hidden-sm { display: initial; }
@media (max-width: 575.98px) { .hidden-sm { display: none; } }

/* Hide on tablets */
.hidden-md { display: initial; }
@media (min-width: 768px) and (max-width: 991.98px) { .hidden-md { display: none; } }

/* Hide on desktop */
.hidden-lg { display: initial; }
@media (min-width: 992px) { .hidden-lg { display: none; } }

/* Show only on mobile */
.visible-xs { display: none; }
@media (max-width: 575.98px) { .visible-xs { display: initial; } }

/* Show only on tablets */
.visible-md { display: none; }
@media (min-width: 768px) and (max-width: 991.98px) { .visible-md { display: initial; } }

/* Show only on desktop */
.visible-lg { display: none; }
@media (min-width: 992px) { .visible-lg { display: initial; } }

/* ===== RESPONSIVE FLEXBOX UTILITIES ===== */

.flex-responsive {
  display: flex;
  flex-direction: column;
  gap: var(--space-responsive-sm);
}

@media (min-width: 768px) {
  .flex-responsive {
    flex-direction: row;
    gap: var(--space-responsive-md);
  }
}

.flex-responsive-reverse {
  display: flex;
  flex-direction: column-reverse;
  gap: var(--space-responsive-sm);
}

@media (min-width: 768px) {
  .flex-responsive-reverse {
    flex-direction: row-reverse;
    gap: var(--space-responsive-md);
  }
}

/* ===== RESPONSIVE IMAGE SYSTEM ===== */

.responsive-image {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-lg);
  transition: all var(--duration-normal) var(--ease-out);
}

.responsive-image-contain {
  object-fit: contain;
}

.responsive-image-cover {
  object-fit: cover;
}

/* ===== RESPONSIVE CARD SYSTEM ===== */

.responsive-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-backdrop-filter);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-responsive-sm);
  transition: all var(--duration-normal) var(--ease-out);
}

@media (min-width: 768px) {
  .responsive-card {
    padding: var(--space-responsive-md);
    border-radius: var(--radius-2xl);
  }
}

@media (min-width: 1200px) {
  .responsive-card {
    padding: var(--space-responsive-lg);
  }
}

/* ===== RESPONSIVE ANIMATION SYSTEM ===== */

.responsive-animation {
  animation-duration: var(--duration-normal);
  animation-timing-function: var(--ease-out);
}

@media (prefers-reduced-motion: reduce) {
  .responsive-animation {
    animation: none !important;
    transition: none !important;
  }
}

/* Reduce animation complexity on low-performance devices */
@media (max-width: 768px) {
  .responsive-animation {
    animation-duration: var(--duration-fast);
  }
}

/* ===== RESPONSIVE SCROLL BEHAVIOR ===== */

.responsive-scroll {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

@media (prefers-reduced-motion: reduce) {
  .responsive-scroll {
    scroll-behavior: auto;
  }
}

/* ===== RESPONSIVE FOCUS MANAGEMENT ===== */

.responsive-focus {
  outline: 2px solid transparent;
  outline-offset: 2px;
  transition: outline-color var(--duration-fast) var(--ease-out);
}

.responsive-focus:focus-visible {
  outline-color: var(--color-primary);
}

/* Larger focus indicators on touch devices */
@media (hover: none) and (pointer: coarse) {
  .responsive-focus:focus-visible {
    outline-width: 3px;
    outline-offset: 3px;
  }
}

/* ===== RESPONSIVE PERFORMANCE OPTIMIZATIONS ===== */

/* Optimize animations for different device capabilities */
@media (max-width: 768px) {
  .performance-optimized {
    will-change: auto;
    transform: translateZ(0);
  }
}

@media (min-width: 769px) {
  .performance-optimized {
    will-change: transform, opacity;
  }
}

/* ===== RESPONSIVE ERROR HANDLING ===== */

.responsive-fallback {
  display: block;
  width: 100%;
  max-width: 100%;
  overflow: hidden;
}

/* Fallback for browsers that don't support CSS Grid */
@supports not (display: grid) {
  .responsive-grid {
    display: flex;
    flex-wrap: wrap;
    margin: calc(var(--space-responsive-sm) * -0.5);
  }
  
  .responsive-grid > * {
    flex: 1 1 300px;
    margin: calc(var(--space-responsive-sm) * 0.5);
  }
}

/* Fallback for browsers that don't support CSS custom properties */
@supports not (color: var(--color-primary)) {
  .responsive-container {
    padding-left: 16px;
    padding-right: 16px;
  }
  
  .responsive-grid {
    gap: 16px;
  }
  
  .touch-target {
    min-height: 44px;
    min-width: 44px;
  }
}

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

@media print {
  .responsive-container {
    max-width: none;
    padding: 0;
  }
  
  .responsive-grid {
    display: block;
  }
  
  .responsive-card {
    background: white;
    border: 1px solid #ccc;
    page-break-inside: avoid;
    margin-bottom: 16px;
  }
  
  .hidden-print {
    display: none !important;
  }
}

/* ===== RESPONSIVE ACCESSIBILITY ENHANCEMENTS ===== */

/* High contrast mode support */
@media (prefers-contrast: high) {
  .responsive-card {
    background: var(--color-white);
    border: 2px solid var(--color-black);
  }
  
  .touch-feedback::after {
    background: var(--color-black);
  }
}

/* Forced colors mode support */
@media (forced-colors: active) {
  .responsive-card {
    background: Canvas;
    border: 1px solid CanvasText;
  }
  
  .touch-target {
    border: 1px solid ButtonText;
  }
}

/* ===== RESPONSIVE LOADING STATES ===== */

.responsive-loading {
  position: relative;
  overflow: hidden;
}

.responsive-loading::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.2) 50%,
    transparent 100%
  );
  animation: loading-shimmer 2s infinite;
}

@keyframes loading-shimmer {
  0% { left: -100%; }
  100% { left: 100%; }
}

/* Reduce loading animation on low-performance devices */
@media (max-width: 768px) {
  .responsive-loading::after {
    animation-duration: 3s;
  }
}

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

/* Responsive text alignment */
.text-center-mobile {
  text-align: center;
}

@media (min-width: 768px) {
  .text-center-mobile {
    text-align: left;
  }
}

.text-left-desktop {
  text-align: center;
}

@media (min-width: 992px) {
  .text-left-desktop {
    text-align: left;
  }
}

/* Responsive display utilities */
.block-mobile {
  display: block;
}

@media (min-width: 768px) {
  .block-mobile {
    display: flex;
  }
}

.flex-desktop {
  display: block;
}

@media (min-width: 992px) {
  .flex-desktop {
    display: flex;
  }
}