/* ===== RESPONSIVE DESIGN ===== */

/* Large screens (1200px and up) */
@media (min-width: 1200px) {
  .container {
    padding: 0 var(--spacing-lg);
  }
  
  .hero__title {
    font-size: 3.5rem;
  }
  
  .section__title {
    font-size: 3rem;
  }
}

/* Medium screens (768px to 1199px) */
@media (max-width: 1199px) {
  :root {
    --section-padding: 3rem;
    --font-size-5xl: 2.5rem;
    --font-size-4xl: 2rem;
    --font-size-3xl: 1.75rem;
  }
  
  .container {
    padding: 0 var(--spacing-lg);
  }
  
  .hero__container {
    gap: var(--spacing-2xl);
  }
  
  .section__content {
    gap: var(--spacing-2xl);
  }
  
  .project__content {
    gap: var(--spacing-xl);
  }
}

/* Small screens and tablets (481px to 768px) */
@media (max-width: 768px) {
  :root {
    --section-padding: 2rem;
    --spacing-4xl: 3rem;
    --spacing-3xl: 2rem;
    --spacing-2xl: 1.5rem;
  }
  
  .container {
    padding: 0 var(--spacing-md);
  }
  
  /* Navigation Mobile */
  .nav__menu {
    position: fixed;
    top: var(--header-height);
    left: -100%;
    width: 100%;
    height: calc(100vh - var(--header-height));
    background-color: var(--color-white);
    flex-direction: column;
    justify-content: flex-start;
    padding: var(--spacing-2xl);
    transition: left var(--transition-base);
    box-shadow: var(--shadow-lg);
    z-index: 999;
  }
  
  .nav__menu.active {
    left: 0;
  }
  
  .nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
  }
  
  .nav__item {
    border-bottom: 1px solid var(--color-gray-200);
  }
  
  .nav__item:last-child {
    border-bottom: none;
  }
  
  .nav__link {
    display: block;
    padding: var(--spacing-lg) 0;
    font-size: var(--font-size-base);
    text-align: center;
  }
  
  .nav__link::after {
    display: none;
  }
  
  .nav__toggle {
    display: flex;
    z-index: 1001;
  }
  
  .nav__toggle.active .nav__toggle-icon {
    background-color: transparent;
  }
  
  .nav__toggle.active .nav__toggle-icon::before {
    top: 0;
    transform: rotate(45deg);
  }
  
  .nav__toggle.active .nav__toggle-icon::after {
    top: 0;
    transform: rotate(-45deg);
  }
  
  /* Hero Section Mobile */
  .hero {
    padding: var(--spacing-2xl) 0;
    min-height: 60vh;
  }
  
  .hero__container {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    text-align: center;
  }
  
  .hero__title {
    font-size: var(--font-size-4xl);
  }
  
  .hero__description {
    max-width: 100%;
  }
  
  .hero__buttons {
    justify-content: center;
  }
  
  /* Section Content Mobile */
  .section__content,
  .section__content.reverse {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    direction: ltr;
  }
  
  .section__content.reverse > * {
    direction: ltr;
  }
  
  .section__text {
    max-width: 100%;
    text-align: center;
  }
  
  .section__features {
    max-width: 400px;
    margin: 0 auto;
  }
  
  /* Project Cards Mobile */
  .project__content,
  .project-card.reverse .project__content {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    direction: ltr;
  }
  
  .project-card.reverse .project__content > * {
    direction: ltr;
  }
  
  .project__info {
    text-align: center;
  }
  
  .spec-item {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
    text-align: left;
  }
  
  .partner-logo {
    justify-content: center;
    margin-top: var(--spacing-sm);
  }
  
  /* Contact Section Mobile */
  .contact__container {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }
  
  .contact__info {
    order: 2;
  }
  
  .contact__form {
    order: 1;
    padding: var(--spacing-xl);
  }
  
  /* Footer Mobile */
  .footer__content {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    text-align: center;
  }
  
  .footer__brand {
    max-width: 100%;
  }
  
  .footer__links {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }
}

/* Extra small screens (up to 480px) */
@media (max-width: 480px) {
  :root {
    --section-padding: 1.5rem;
    --spacing-3xl: 1.5rem;
    --spacing-2xl: 1rem;
    --spacing-xl: 0.75rem;
    --font-size-5xl: 2rem;
    --font-size-4xl: 1.75rem;
    --font-size-3xl: 1.5rem;
    --font-size-2xl: 1.25rem;
  }
  
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  /* Header Mobile */
  .nav {
    padding: 0 var(--spacing-sm);
  }
  
  .nav__logo {
    height: 32px;
  }
  
  .language-switcher {
    display: none; /* Hide on very small screens */
  }
  
  /* Typography Mobile */
  .hero__title {
    font-size: var(--font-size-3xl);
    line-height: 1.2;
  }
  
  .hero__description {
    font-size: var(--font-size-base);
  }
  
  .section__title {
    font-size: var(--font-size-3xl);
  }
  
  .section__subtitle {
    font-size: var(--font-size-base);
  }
  
  .section__description {
    font-size: var(--font-size-base);
  }
  
  /* Buttons Mobile */
  .hero__buttons {
    flex-direction: column;
    align-items: stretch;
    gap: var(--spacing-sm);
  }
  
  .btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-sm);
    min-height: 44px;
  }
  
  /* Cards Mobile */
  .project-card {
    padding: var(--spacing-lg);
  }
  
  .feature-item {
    padding: var(--spacing-sm);
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-sm);
  }
  
  .feature-icon {
    font-size: var(--font-size-xl);
  }
  
  /* Form Mobile */
  .contact__form {
    padding: var(--spacing-md);
  }
  
  .form-group input,
  .form-group select,
  .form-group textarea {
    padding: var(--spacing-sm);
    font-size: var(--font-size-base);
  }
  
  /* Footer Mobile */
  .footer {
    padding: var(--spacing-2xl) 0 var(--spacing-lg) 0;
  }
  
  .footer__content {
    gap: var(--spacing-lg);
  }
  
  .footer__links {
    gap: var(--spacing-lg);
  }
  
  .footer__logo {
    height: 32px;
  }
}

/* Print styles */
@media print {
  .header,
  .nav__toggle,
  .language-switcher,
  .contact__form,
  .blog__loading {
    display: none;
  }
  
  .main {
    padding-top: 0;
  }
  
  .section {
    break-inside: avoid;
    page-break-inside: avoid;
  }
  
  .project-card {
    break-inside: avoid;
    page-break-inside: avoid;
    margin-bottom: var(--spacing-lg);
    box-shadow: none;
    border: 1px solid var(--color-gray-300);
  }
  
  a[href]::after {
    content: " (" attr(href) ")";
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
  }
  
  .hero__buttons .btn::after,
  .nav__link::after,
  .contact__link::after {
    display: none;
  }
}

/* Reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  
  .loading-spinner {
    animation: none;
  }
}

/* High contrast mode */
@media (prefers-contrast: high) {
  :root {
    --color-primary: #0066cc;
    --color-primary-dark: #004499;
    --color-text-primary: #000000;
    --color-text-secondary: #333333;
    --color-gray-300: #666666;
  }
  
  .btn--primary {
    background-color: var(--color-primary);
    border: 2px solid var(--color-primary-dark);
  }
  
  .btn--secondary {
    border-width: 3px;
  }
  
  .nav__link::after {
    height: 3px;
  }
  
  .form-group input:focus,
  .form-group select:focus,
  .form-group textarea:focus {
    border-width: 3px;
    box-shadow: 0 0 0 2px var(--color-primary);
  }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
  :root {
    --color-white: #1a202c;
    --color-gray-50: #2d3748;
    --color-gray-100: #4a5568;
    --color-gray-200: #718096;
    --color-gray-300: #a0aec0;
    --color-gray-500: #cbd5e0;
    --color-gray-700: #e2e8f0;
    --color-gray-800: #f7fafc;
    --color-gray-900: #ffffff;
    
    --color-text-primary: var(--color-gray-900);
    --color-text-secondary: var(--color-gray-700);
    --color-text-muted: var(--color-gray-500);
  }
  
  .header {
    background-color: rgba(26, 32, 44, 0.95);
    border-bottom-color: var(--color-gray-200);
  }
  
  .hero {
    background: linear-gradient(135deg, var(--color-gray-50) 0%, var(--color-white) 100%);
  }
  
  .nav__menu {
    background-color: var(--color-white);
  }
  
  .footer {
    background-color: #000000;
  }
  
  .footer__logo {
    filter: brightness(1) invert(0);
  }
}

/* Landscape orientation adjustments for tablets */
@media (max-width: 1024px) and (orientation: landscape) {
  .hero {
    min-height: 50vh;
    padding: var(--spacing-xl) 0;
  }
  
  .hero__container {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
  }
  
  .hero__title {
    font-size: var(--font-size-3xl);
  }
  
  .section {
    padding: var(--spacing-xl) 0;
  }
}

/* Ultra-wide screens (1400px and up) */
@media (min-width: 1400px) {
  :root {
    --container-max-width: 1400px;
  }
  
  .hero__title {
    font-size: 4rem;
  }
  
  .section__title {
    font-size: 3.5rem;
  }
}

/* Touch device optimizations */
@media (hover: none) and (pointer: coarse) {
  .btn {
    min-height: 48px;
    font-size: var(--font-size-base);
  }
  
  .nav__link {
    padding: var(--spacing-md) 0;
  }
  
  .lang-btn {
    min-height: 40px;
    padding: var(--spacing-sm) var(--spacing-md);
  }
  
  .feature-item:hover,
  .project-card:hover,
  .blog-post:hover {
    transform: none;
  }
  
  .btn--primary:hover {
    transform: none;
  }
}

/* Accessibility: Focus styles */
@media (hover: hover) and (pointer: fine) {
  .btn:focus,
  .nav__link:focus,
  .lang-btn:focus {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
  }
  
  .form-group input:focus,
  .form-group select:focus,
  .form-group textarea:focus {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
  }
}

/* Container queries support (future-proofing) */
@supports (container-type: inline-size) {
  .section {
    container-type: inline-size;
  }
  
  @container (max-width: 768px) {
    .section__content {
      grid-template-columns: 1fr;
    }
  }
}

/* Grid layout fallback for older browsers */
@supports not (display: grid) {
  .hero__container,
  .section__content,
  .project__content,
  .contact__container,
  .footer__content {
    display: block;
  }
  
  .hero__content,
  .section__text,
  .section__image,
  .project__info,
  .project__image,
  .contact__info,
  .contact__form,
  .footer__brand,
  .footer__links {
    display: block;
    width: 100%;
    margin-bottom: var(--spacing-xl);
  }
  
  .hero__image,
  .section__image,
  .project__image {
    margin-bottom: 0;
  }
}

/* Flexbox fallback for older browsers */
@supports not (display: flex) {
  .nav,
  .nav__list,
  .nav__actions,
  .hero__buttons,
  .section__features,
  .project__specs,
  .contact__item,
  .feature-item,
  .spec-item,
  .partner-logo,
  .footer__list {
    display: block;
  }
  
  .nav__item,
  .feature-item,
  .spec-item {
    margin-bottom: var(--spacing-sm);
  }
}

/* Performance optimizations */
@media (min-width: 1200px) {
  .hero__img,
  .section__img,
  .project__img {
    will-change: transform;
  }
}