/* K3K3 MVP Responsive Design */

/* Modern Mobile-First Approach */
:root {
  --mobile-breakpoint: 768px;
  --tablet-breakpoint: 1024px;
  --small-mobile: 480px;
}

/* Large Tablets and Small Desktops */
@media (max-width: 1024px) {
  .hero-container {
    grid-template-columns: 1fr;
    gap: 2rem;
    text-align: center;
  }
  
  .hero-content h1 {
    font-size: 2.5rem;
  }
  
  .hero-visual {
    order: -1;
  }
  
  .hero-graphic {
    width: 200px;
    height: 200px;
    font-size: 5rem;
  }
  
  .features-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }
  
  .footer-content {
    grid-template-columns: repeat(2, 1fr);
  }
  
  /* Index page specific responsive adjustments */
  .about-modern .about-content {
    flex-direction: column;
    gap: 3rem;
    padding: 4rem 2rem;
  }
  
  .about-modern .about-text h2 {
    font-size: 2.8rem;
  }
  
  .about-modern .hero-subtitle {
    font-size: 1.5rem;
  }
  
  .about-modern .hero-description {
    font-size: 1.05rem;
  }
  
  .about-modern .hero-visual {
    width: 350px;
    height: 350px;
  }
  
  .about-modern .hero-icon {
    font-size: 5rem;
  }
}

/* Tablets */
@media (max-width: 768px) {
  .nav-container {
    padding: 0 15px;
  }
  
  .nav-menu {
    display: none;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--k3k3-white);
    flex-direction: column;
    padding: 1rem;
    box-shadow: var(--shadow-lg);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  }
  
  .nav-menu.active {
    display: flex;
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  .hero-section {
    padding: 100px 0 60px;
  }
  
  .hero-content h1 {
    font-size: 2rem;
  }
  
  .hero-subtitle {
    font-size: 1.1rem;
  }
  
  .hero-actions {
    justify-content: center;
  }
  
  .btn-large {
    padding: 1rem 2rem;
    font-size: 1rem;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .feature-card {
    padding: 1.5rem;
  }
  
  .stats-section {
    padding: 60px 0;
  }
  
  .stat-number {
    font-size: 2.5rem;
  }
  
  .cta-section {
    padding: 60px 0;
  }
  
  .cta-title {
    font-size: 2rem;
  }
  
  .cta-subtitle {
    font-size: 1.1rem;
  }
  
  .cta-actions {
    flex-direction: column;
    align-items: center;
  }
  
  .main-footer {
    padding: 40px 0 20px;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: 2rem;
    text-align: center;
  }
  
  /* Index page mobile adjustments */
  .about-modern .about-content {
    flex-direction: column;
    gap: 2rem;
    padding: 3rem 1.5rem;
  }
  
  .about-modern .about-text h2 {
    font-size: 2.2rem;
  }
  
  .about-modern .hero-subtitle {
    font-size: 1.3rem;
  }
  
  .about-modern .hero-description {
    font-size: 1rem;
  }
  
  .about-modern .hero-visual {
    width: 280px;
    height: 280px;
  }
  
  .about-modern .hero-icon {
    font-size: 4rem;
  }
  
  .values-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .cta-buttons {
    flex-direction: column;
    align-items: center;
    gap: 1rem;
  }
  
  .cta-btn {
    width: 100%;
    max-width: 300px;
    justify-content: center;
  }
  
  .about-modern .hero-buttons {
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
  }
  
  .about-modern .btn-primary,
  .about-modern .btn-secondary {
    width: 100%;
    max-width: 280px;
    justify-content: center;
  }
}

/* Mobile Phones */
@media (max-width: 480px) {
  .container {
    padding: 0 15px;
  }
  
  .nav-container {
    padding: 0 10px;
  }
  
  .brand-text {
    font-size: 1.2rem;
  }
  
  .brand-logo {
    width: 35px;
    height: 35px;
  }
  
  .hero-section {
    padding: 80px 0 40px;
  }
  
  .hero-content h1 {
    font-size: 1.75rem;
    line-height: 1.3;
  }
  
  .hero-subtitle {
    font-size: 1rem;
    margin-bottom: 1.5rem;
  }
  
  .hero-actions {
    gap: 0.75rem;
  }
  
  .btn {
    padding: 0.875rem 1.5rem;
    font-size: 0.9rem;
  }
  
  .section-title {
    font-size: 1.75rem;
  }
  
  .features-section {
    padding: 60px 0;
  }
  
  .feature-card {
    padding: 1.25rem;
  }
  
  .feature-icon {
    width: 60px;
    height: 60px;
    font-size: 1.5rem;
  }
  
  .feature-title {
    font-size: 1.25rem;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .stat-item {
    padding: 1.5rem;
  }
  
  .stat-number {
    font-size: 2rem;
  }
  
  .cta-title {
    font-size: 1.75rem;
  }
  
  .cta-subtitle {
    font-size: 1rem;
  }
  
  .main-footer {
    padding: 30px 0 15px;
  }
  
  .footer-logo {
    width: 50px;
    height: 50px;
  }
  
  .footer-title {
    font-size: 1.25rem;
  }
  
  /* Index page small mobile adjustments */
  .about-modern .about-content {
    padding: 2rem 1rem;
    gap: 1.5rem;
  }
  
  .about-modern .about-text h2 {
    font-size: 1.8rem;
  }
  
  .about-modern .hero-subtitle {
    font-size: 1.1rem;
  }
  
  .about-modern .hero-description {
    font-size: 0.9rem;
  }
  
  .about-modern .hero-visual {
    width: 220px;
    height: 220px;
  }
  
  .about-modern .hero-icon {
    font-size: 3rem;
  }
  
  .values {
    padding: 2rem 1rem;
  }
  
  .values-header h2 {
    font-size: 1.8rem;
  }
  
  .values-header p {
    font-size: 0.95rem;
  }
  
  .cta {
    padding: 2rem 1rem;
  }
  
  .cta h2 {
    font-size: 1.8rem;
  }
  
  .cta p {
    font-size: 0.95rem;
  }
  
  footer {
    padding: 1.5rem 1rem;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
  }
  
  .footer-language {
    width: 100%;
    justify-content: center;
  }
  
  .about-modern .hero-buttons {
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
  }
  
  .about-modern .btn-primary,
  .about-modern .btn-secondary {
    width: 100%;
    max-width: 280px;
    justify-content: center;
    padding: 0.875rem 1.5rem;
    font-size: 0.9rem;
  }
}

/* Extra Small Mobile */
@media (max-width: 320px) {
  .hero-content h1 {
    font-size: 1.5rem;
  }
  
  .brand-highlight {
    display: block;
  }
  
  .btn {
    padding: 0.75rem 1.25rem;
    font-size: 0.85rem;
  }
  
  .section-title {
    font-size: 1.5rem;
  }
  
  .feature-title {
    font-size: 1.1rem;
  }
  
  .stat-number {
    font-size: 1.75rem;
  }
}

/* Landscape Orientation */
@media (max-height: 500px) and (orientation: landscape) {
  .hero-section {
    padding: 60px 0 30px;
  }
  
  .hero-content h1 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
  }
  
  .hero-subtitle {
    font-size: 0.9rem;
    margin-bottom: 1rem;
  }
  
  .hero-graphic {
    width: 150px;
    height: 150px;
    font-size: 3rem;
  }
  
  .features-section {
    padding: 40px 0;
  }
  
  .stats-section {
    padding: 40px 0;
  }
  
  .cta-section {
    padding: 40px 0;
  }
}

/* High Resolution Displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  .brand-logo,
  .footer-logo {
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
  }
}

/* Print Styles */
@media print {
  .main-header,
  .hero-actions,
  .nav-actions,
  .theme-toggle {
    display: none;
  }
  
  .hero-section {
    padding: 40px 0;
    background: none;
  }
  
  .hero-graphic {
    display: none;
  }
  
  .features-section,
  .stats-section,
  .cta-section {
    page-break-inside: avoid;
  }
  
  .main-footer {
    background: var(--k3k3-gray-100);
    color: var(--k3k3-gray-700);
  }
  
  body {
    color: var(--k3k3-gray-700);
  }
}

/* Additional Mobile Optimizations */
@media (max-width: 768px) {
  /* Smooth scrolling for mobile */
  html {
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
  }
  
  /* Prevent text selection on mobile */
  .btn, .cta-btn, .header a {
    -webkit-tap-highlight-color: transparent;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
  }
  
  /* Better touch targets */
  .header a {
    min-height: 44px;
    min-width: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  /* Prevent horizontal scroll */
  body {
    overflow-x: hidden;
    width: 100%;
  }
  
  /* Safe area for notched devices */
  .header, .footer {
    padding-left: env(safe-area-inset-left);
    padding-right: env(safe-area-inset-right);
  }
  
  /* Mobile hover-like feedback for all interactive elements */
  .btn, .cta-btn, button, .header a, .about-text button {
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
  }
  
  /* Ripple effect on touch */
  .btn::before, .cta-btn::before, button::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    transform: translate(-50%, -50%);
    transition: width 0.3s, height 0.3s;
  }
  
  .btn:active::before, .cta-btn:active::before, button:active::before {
    width: 300px;
    height: 300px;
  }
  
  /* Enhanced touch feedback */
  .btn:active, .cta-btn:active, button:active {
    transform: scale(0.98);
    opacity: 0.9;
  }
  
  /* Card interactions */
  .value-card, .feature-card, .stat-card {
    transition: all 0.3s ease;
  }
  
  .value-card:active, .feature-card:active, .stat-card:active {
    transform: scale(0.98);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  }
}

/* Small Mobile Devices */
@media (max-width: 480px) {
  /* Optimize for small screens */
  .about-modern .hero-icon {
    font-size: 3rem;
  }
  
  .about-modern .about-text h2 {
    font-size: 1.8rem;
  }
  
  /* Better spacing */
  .values-grid {
    gap: 1.5rem;
  }
  
  .cta-buttons {
    gap: 0.75rem;
  }
  
  /* Full width buttons on mobile */
  .hero-buttons .btn-primary,
  .hero-buttons .btn-secondary {
    width: 100%;
    max-width: 280px;
  }
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  background: rgba(0,0,0,0.12);
  border: none;
  padding: 0.45rem 0.6rem;
  border-radius: 8px;
  cursor: pointer;
  color: #0c0d10 !important;
  transition: all 0.3s ease;
}

.mobile-menu-toggle:hover,
.mobile-menu-toggle:focus {
  background: rgba(0,0,0,0.22);
  color: #000 !important;
}

.mobile-menu-toggle i {
  font-size: 1.4rem;
  color: #0c0d10 !important;
  display: block;
}

/* Show mobile menu toggle on smaller screens */
@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: block;
  }
}
@media (hover: none) {
  /* Haptic feedback simulation for buttons */
  .btn, .cta-btn, button, .header a {
    transition: all 0.15s ease;
  }
  
  /* Press and hold feedback */
  .btn:active, .cta-btn:active, button:active {
    transition: all 0.1s ease;
    transform: scale(0.96);
  }
  
  /* Enhanced card feedback */
  .value-card, .feature-card, .stat-card {
    transition: all 0.2s ease;
  }
  
  .value-card:active, .feature-card:active, .stat-card:active {
    transition: all 0.1s ease;
    transform: scale(0.97);
    box-shadow: 0 1px 4px rgba(0,0,0,0.1);
  }
  
  /* Link feedback */
  a {
    transition: all 0.2s ease;
  }
  
  a:active {
    opacity: 0.7;
    transform: scale(0.98);
  }
  
  /* Form input feedback */
  input, textarea, select {
    transition: all 0.2s ease;
  }
  
  input:focus, textarea:focus, select:focus {
    transform: scale(1.02);
    box-shadow: 0 0 0 3px rgba(255, 214, 10, 0.3);
  }
  
  /* Image feedback */
  img {
    transition: all 0.2s ease;
  }
  
  img:active {
    opacity: 0.8;
    transform: scale(0.98);
  }
  
  /* Scroll animations for mobile */
  .fade-in-on-scroll {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease;
  }
  
  .fade-in-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
  }
  
  /* Touch feedback for navigation */
  .header a {
    position: relative;
  }
  
  .header a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    width: 0;
    height: 2px;
    background: currentColor;
    transition: all 0.3s ease;
    transform: translateX(-50%);
  }
  
  .header a:active::after {
    width: 100%;
  }
}

.mobile-menu-toggle i {
  font-size: 1.5rem;
  color: #0c0d10;
}

/* Show mobile menu toggle on smaller screens */
@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: block;
  }
}

/* Touch-friendly targets */
@media (pointer: coarse) {
  .btn,
  .nav-link,
  .theme-toggle {
    min-height: 44px;
    min-width: 44px;
  }
  
  .feature-card {
    padding: 2rem 1.5rem;
  }
  
  .stat-item {
    padding: 2rem 1.5rem;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .hero-graphic {
    animation: none;
  }
  
  .feature-card:hover,
  .btn:hover {
    transform: none;
  }
}