/*
 * Sinowealth Distributor Website - Responsive CSS
 * Mobile-first approach with progressive enhancement
 */

/* Container widths */
.container {
  width: 100%;
  padding-right: var(--spacing-md);
  padding-left: var(--spacing-md);
  margin-right: auto;
  margin-left: auto;
}

@media (min-width: 576px) {
  .container {
    max-width: 540px;
  }
}

@media (min-width: 768px) {
  .container {
    max-width: 720px;
  }
}

@media (min-width: 992px) {
  .container {
    max-width: 960px;
  }
}

@media (min-width: 1200px) {
  .container {
    max-width: 1140px;
  }
}

@media (min-width: 1400px) {
  .container {
    max-width: 1320px;
  }
}

/* Mobile menu styles */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px; /* Larger touch target for accessibility */
  height: 44px;
  background: none;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  cursor: pointer;
}

/* Hamburger icon styling */
.hamburger {
  width: 20px;
  height: 2px;
  background-color: var(--primary-color);
  border-radius: var(--border-radius-xs);
  transition: all var(--transition-base);
  transform-origin: center;
}

.mobile-menu-toggle.active .hamburger:nth-child(1) {
  transform: rotate(-45deg) translate(-5px, 6px);
}

.mobile-menu-toggle.active .hamburger:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active .hamburger:nth-child(3) {
  transform: rotate(45deg) translate(-5px, -6px);
}

/* Navigation menu - Mobile first */
.nav-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: var(--white);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-md) 0;
  z-index: var(--z-index-dropdown);
}

.nav-menu.active {
  display: flex;
  flex-direction: column;
}

.nav-list {
  display: flex;
  flex-direction: column;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-item {
  width: 100%;
}

.nav-link {
  display: block;
  padding: var(--spacing-md) var(--spacing-lg);
  color: var(--text-color);
  text-decoration: none;
  transition: background-color var(--transition-base);
}

.dropdown-menu {
  display: none;
  flex-direction: column;
  width: 100%;
  background-color: var(--secondary-color);
  padding-left: var(--spacing-lg);
}

.dropdown-menu.active {
  display: flex;
}

/* Desktop navigation styles */
@media (min-width: 768px) {
  .mobile-menu-toggle {
    display: none;
  }
  
  .nav-menu {
    position: static;
    display: flex !important; /* Override mobile display: none */
    flex-direction: row;
    box-shadow: none;
    padding: 0;
    background: none;
  }
  
  .nav-list {
    flex-direction: row;
    gap: var(--spacing-lg);
  }
  
  .nav-item {
    width: auto;
  }
  
  .nav-link {
    padding: var(--spacing-sm) 0;
    position: relative;
  }
  
  .dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    background-color: var(--white);
    box-shadow: var(--shadow-md);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-sm) 0;
    list-style: none;
    margin: 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-base);
    z-index: var(--z-index-dropdown);
  }
  
  .nav-item:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  
  .nav-item.has-submenu:hover .nav-link {
    color: var(--primary-color);
  }
}

/* Hero Section Responsive Design */
.hero-content {
  flex-direction: column;
  text-align: center;
  gap: var(--spacing-xl);
  padding: 0 var(--spacing-md);
}

.hero-text {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-title {
  font-size: var(--font-size-xxxl);
  line-height: var(--line-height-heading);
}

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

.hero-cta {
  justify-content: center;
  flex-direction: column;
  align-items: stretch;
  gap: var(--spacing-md);
}

.btn {
  width: 100%;
  max-width: 300px;
  margin: 0 auto;
}

/* Responsive grid layouts */
.advantages-grid {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
}

.products-grid {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
}

.solutions-grid {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
}

.news-grid {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
}

/* Responsive tables */
.table-responsive {
  display: block;
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  -ms-overflow-style: -ms-autohiding-scrollbar;
}

.table-responsive > .table {
  margin-bottom: 0;
}

/* Footer Responsiveness */
.footer-content {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-xl);
}

.footer-bottom {
  flex-direction: column;
  text-align: center;
  gap: var(--spacing-md);
}

.copyright {
  order: 2;
}

.footer-legal {
  order: 1;
  margin-bottom: var(--spacing-md);
}

/* Tablet Styles (Medium Devices) */
@media (min-width: 768px) and (max-width: 991.98px) {
  .hero-section {
    padding: var(--spacing-xxl) var(--spacing-lg);
  }
  
  .hero-content {
    gap: var(--spacing-xl);
  }
  
  .advantages-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .solutions-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .news-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .hero-cta {
    flex-direction: row;
    align-items: center;
    gap: var(--spacing-md);
  }
  
  .btn {
    width: auto;
    max-width: none;
  }
  
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
  
  .copyright {
    order: 0;
  }
  
  .footer-legal {
    order: 0;
    margin-bottom: 0;
  }
}

/* Desktop Styles (Large Devices) */
@media (min-width: 992px) {
  .hero-content {
    flex-direction: row;
    align-items: center;
    text-align: left;
    gap: var(--spacing-xxl);
  }
  
  .hero-text {
    flex: 1;
    align-items: flex-start;
  }
  
  .hero-image {
    flex: 0 0 auto;
  }
  
  .hero-cta {
    justify-content: flex-start;
    flex-direction: row;
    align-items: center;
    gap: var(--spacing-lg);
  }
  
  .btn {
    width: auto;
  }
  
  .advantages-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .products-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .solutions-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .news-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Large Desktop Styles (Extra Large Devices) */
@media (min-width: 1200px) {
  .advantages-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .products-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .solutions-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .news-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .hero-title {
    font-size: var(--font-size-xxxxl);
  }
  
  .hero-subtitle {
    font-size: var(--font-size-xl);
  }
}

/* Extra Extra Large Desktops */
@media (min-width: 1400px) {
  .container {
    max-width: 1320px;
  }
  
  .hero-content {
    max-width: 1400px;
    margin: 0 auto;
  }
}

/* Touch device optimizations */
@media (hover: none) and (pointer: coarse) {
  .nav-link {
    padding: var(--spacing-md) var(--spacing-lg);
    min-height: 44px; /* Minimum touch target size */
  }
  
  .btn {
    min-height: 44px;
    padding: var(--spacing-md) var(--spacing-xl);
  }
  
  .mobile-menu-toggle {
    width: 48px;
    height: 48px;
  }
}

/* Print Styles */
@media print {
  .header,
  .mobile-menu-toggle,
  .btn,
  .footer-legal,
  .newsletter,
  .back-to-top {
    display: none !important;
  }
  
  body {
    font-size: 12pt;
    line-height: 1.5;
  }
  
  .container {
    max-width: 100% !important;
    padding: 0;
  }
  
  .hero-content,
  .feature-card,
  .product-card {
    break-inside: avoid;
  }
  
  a {
    text-decoration: underline !important;
    color: black !important;
  }
  
  a[href]:after {
    content: " (" attr(href) ")";
    font-size: 0.9em;
    color: #666;
  }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
  :root {
    --border-color: #000;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  }
  
  .card,
  .btn,
  .nav-link {
    border: 2px solid var(--border-color);
  }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .card:hover,
  .btn:hover,
  .nav-link:hover,
  .feature-card:hover,
  .product-card:hover,
  .solution-card:hover {
    transform: none;
  }
  
  .hero-section {
    background-image: none;
  }
}

/* Orientation-specific styles */
@media (orientation: landscape) and (max-height: 500px) {
  .hero-section {
    padding: var(--spacing-lg) 0;
  }
  
  .header {
    padding: var(--spacing-sm) 0;
  }
  
  .nav-menu {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    max-height: calc(100vh - 60px);
    overflow-y: auto;
  }
}

/* Wide screen support */
@media (min-width: 1600px) {
  .container {
    max-width: 1500px;
  }
  
  .hero-content {
    max-width: 1400px;
  }
}

/* Focus styles for accessibility in responsive layouts */
@media (max-width: 767.98px) {
  .nav-link:focus,
  .nav-link:active {
    position: relative;
  }
  
  .nav-link:focus::after {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    border: 2px solid var(--primary-color);
    border-radius: var(--border-radius-md);
    pointer-events: none;
  }
  
  .btn:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
  }
}

/* Font size adjustments for different screen sizes */
@media (max-width: 575.98px) {
  .hero-title {
    font-size: var(--font-size-xxl);
  }
  
  .hero-subtitle {
    font-size: var(--font-size-lg);
  }
  
  .section-title {
    font-size: var(--font-size-xl);
  }
  
  .advantage-title,
  .product-title,
  .solution-title {
    font-size: var(--font-size-base);
  }
  
  .btn {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-base);
  }
}

/* Landscape tablet adjustments */
@media (min-width: 768px) and (orientation: landscape) and (max-height: 600px) {
  .header {
    padding: var(--spacing-xs) 0;
  }
  
  .nav-menu {
    position: absolute;
    top: 100%;
    max-height: calc(100vh - 50px);
  }
}

/* High DPI/Retina display optimizations */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  /* Optimize for high pixel density displays */
  .logo,
  .icon {
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
  }
}

/* Reduced transparency for users who prefer less visual noise */
@media (prefers-reduced-transparency: reduce) {
  .header {
    background-color: var(--white) !important;
  }
  
  .modal {
    background-color: rgba(0, 0, 0, 0.8) !important;
  }
  
  .card {
    background-color: var(--white) !important;
    border: 1px solid var(--border-color);
  }
}

/* Enhance contrast for users with low vision */
@media (prefers-contrast: high) {
  .text-primary { color: #004a8f !important; }
  .text-secondary { color: #666666 !important; }
  .text-success { color: #1e7e34 !important; }
  .text-danger { color: #a71e2a !important; }
  
  .bg-primary { background-color: #004a8f !important; }
  .bg-secondary { background-color: #e0e0e0 !important; }
  
  .btn-primary { 
    background-color: #004a8f !important; 
    border-color: #004a8f !important;
  }
}