/* ===================================
   BlackLineSteel - Responsive Styles
   Mobile & Tablet Optimization
   =================================== */

/* ============== Tablet (768px - 1024px) ============== */
@media (max-width: 1024px) {
  :root {
    --font-size-3xl: 36px;
    --font-size-2xl: 28px;
    --font-size-xl: 24px;
    --spacing-xl: 3rem;
    --spacing-lg: 2rem;
  }

  /* Navigation */
  nav {
    padding: var(--spacing-sm) var(--spacing-md);
  }

  nav ul {
    gap: var(--spacing-md);
  }

  nav a {
    font-size: 12px;
    padding: var(--spacing-xs) var(--spacing-sm);
  }

  /* Hero */
  .hero h1 {
    font-size: 3rem;
  }

  .hero .tagline {
    font-size: var(--font-size-base);
  }

  /* About */
  .about-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .about-image {
    height: 300px;
  }

  /* Products Grid */
  .products-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  }

  .product-card {
    height: 300px;
  }

  .product-image {
    height: 200px;
  }

  /* Configurator */
  .configurator-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .configurator-preview {
    height: 300px;
  }

  /* Contact */
  .contact-content {
    grid-template-columns: 1fr;
  }

  /* Services */
  .services-grid {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  }

  /* Section */
  section {
    padding: var(--spacing-lg) var(--spacing-md);
  }

  .section-header h2 {
    font-size: var(--font-size-2xl);
  }

  /* Footer */
  .footer-content {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ============== Mobile (480px - 767px) ============== */
@media (max-width: 767px) {
  :root {
    --font-size-base: 15px;
    --font-size-3xl: 28px;
    --font-size-2xl: 22px;
    --font-size-xl: 18px;
    --font-size-lg: 16px;
    --spacing-xl: 2rem;
    --spacing-lg: 1.5rem;
    --spacing-md: 1.25rem;
  }

  /* Header */
  header {
    position: relative;
  }

  nav {
    padding: 1rem;
    flex-direction: column;
    gap: var(--spacing-sm);
    align-items: flex-start;
  }

  nav ul {
    display: none;
    flex-direction: column;
    width: 100%;
    gap: 0;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    z-index: 999;
  }

  nav ul.active {
    display: flex;
  }

  nav a {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 13px;
    display: block;
    border-bottom: 1px solid var(--border-color);
  }

  nav a::after {
    display: none;
  }

  /* Hamburger Menu */
  .hamburger {
    display: flex;
    order: -1;
  }

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

  .theme-toggle {
    width: 40px;
    height: 40px;
    font-size: 18px;
  }

  /* Hero */
  .hero {
    min-height: 80vh;
    padding: var(--spacing-lg);
  }

  .hero h1 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
  }

  .hero .tagline {
    font-size: var(--font-size-base);
  }

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

  .hero-content {
    padding: var(--spacing-md);
  }

  /* Buttons */
  .btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: var(--font-size-sm);
  }

  /* Sections */
  section {
    padding: var(--spacing-lg) var(--spacing-sm);
  }

  .section-header {
    margin-bottom: var(--spacing-lg);
  }

  .section-header h2 {
    font-size: 22px;
  }

  .section-header h2::after {
    width: 60px;
  }

  /* About */
  .about-values {
    grid-template-columns: 1fr;
  }

  .about-image {
    height: 250px;
  }

  /* Products Grid */
  .products-grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: var(--spacing-md);
  }

  .product-card {
    height: 280px;
  }

  .product-image {
    height: 180px;
    font-size: 40px;
  }

  .product-info {
    padding: var(--spacing-sm);
    height: 100px;
  }

  .product-info h3 {
    font-size: 13px;
  }

  .product-info p {
    font-size: 11px;
  }

  /* Filter Buttons */
  .filter-buttons {
    gap: var(--spacing-sm);
  }

  .filter-btn {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 11px;
  }

  /* Modal */
  .modal {
    padding: var(--spacing-sm);
  }

  .modal-content {
    max-width: 100%;
    border-radius: var(--border-radius-md);
  }

  .modal-image {
    height: 250px;
    font-size: 60px;
  }

  .modal-body {
    padding: var(--spacing-md);
  }

  .modal-body h2 {
    font-size: var(--font-size-lg);
  }

  /* Configurator */
  .configurator-content {
    gap: var(--spacing-lg);
  }

  .configurator-preview {
    height: 250px;
    font-size: 70px;
  }

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

  /* Services */
  .services-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .service-card {
    padding: var(--spacing-md);
  }

  .service-icon {
    font-size: 36px;
  }

  /* Contact */
  .contact-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .contact-form {
    gap: var(--spacing-sm);
  }

  .form-group input,
  .form-group textarea {
    font-size: 16px; /* Prevents zoom on iOS */
  }

  /* Footer */
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .footer-bottom {
    padding-top: var(--spacing-md);
  }
}

/* ============== Small Mobile (< 480px) ============== */
@media (max-width: 479px) {
  :root {
    --font-size-base: 14px;
    --font-size-3xl: 24px;
    --font-size-2xl: 20px;
    --font-size-xl: 16px;
    --spacing-xl: 1.5rem;
    --spacing-lg: 1.25rem;
    --spacing-md: 1rem;
  }

  /* Logo and Header */
  .logo {
    font-size: 16px;
    letter-spacing: 1px;
  }

  .logo-icon {
    width: 18px;
    height: 18px;
  }

  /* Hero */
  .hero h1 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
  }

  .hero .tagline {
    font-size: 13px;
    margin-bottom: var(--spacing-md);
  }

  .hero .description {
    font-size: 12px;
  }

  .btn-lg {
    padding: 0.6rem 1.25rem;
    font-size: 11px;
  }

  /* Section Header */
  .section-header h2 {
    font-size: 20px;
  }

  .section-header p {
    font-size: var(--font-size-base);
  }

  /* About */
  .about-text h3 {
    font-size: 16px;
  }

  .value-item {
    padding: var(--spacing-sm);
    border-left-width: 2px;
  }

  .value-item:hover {
    padding-left: var(--spacing-md);
  }

  /* Products */
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
  }

  .product-card {
    height: 240px;
  }

  .product-image {
    height: 140px;
    font-size: 32px;
  }

  .product-info {
    padding: 0.75rem;
    height: 100px;
  }

  .product-info h3 {
    font-size: 12px;
    margin-bottom: var(--spacing-xs);
  }

  .product-info p {
    font-size: 10px;
  }

  .filter-buttons {
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-lg);
  }

  .filter-btn {
    padding: var(--spacing-xs) 0.75rem;
    font-size: 10px;
    padding: 0.5rem 0.75rem;
  }

  /* Modal */
  .modal-close {
    width: 36px;
    height: 36px;
    font-size: 20px;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
  }

  .modal-image {
    height: 200px;
    font-size: 48px;
  }

  .modal-body {
    padding: var(--spacing-md);
  }

  .modal-body h2 {
    font-size: 18px;
  }

  /* Configurator */
  .configurator-preview {
    height: 200px;
    font-size: 50px;
    border-width: 1px;
  }

  .option-buttons {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xs);
  }

  .option-btn {
    padding: 0.6rem var(--spacing-xs);
    font-size: 10px;
  }

  /* Services */
  .service-icon {
    font-size: 28px;
  }

  .service-card h3 {
    font-size: 14px;
  }

  .service-card p {
    font-size: 12px;
  }

  /* Contact */
  .contact-item {
    gap: var(--spacing-sm);
  }

  .contact-icon {
    font-size: 24px;
    min-width: 32px;
  }

  .contact-item-text h4 {
    font-size: 14px;
  }

  .contact-item-text p {
    font-size: 11px;
  }

  .form-group label {
    font-size: 11px;
  }

  .form-group input,
  .form-group textarea {
    padding: 0.6rem;
    font-size: 14px;
  }

  .form-group textarea {
    min-height: 100px;
  }

  .btn {
    padding: var(--spacing-xs) var(--spacing-sm);
  }

  /* Footer */
  .footer-section h4 {
    font-size: 14px;
  }

  .footer-section ul li a {
    font-size: 11px;
  }

  .social-link {
    width: 36px;
    height: 36px;
    font-size: 16px;
  }

  .footer-bottom {
    font-size: 11px;
    padding-top: var(--spacing-md);
  }
}

/* ============== Touch-friendly Adjustments ============== */
@media (hover: none) and (pointer: coarse) {
  button,
  a,
  input,
  textarea,
  select {
    min-height: 44px;
    min-width: 44px;
  }

  .btn {
    min-height: 44px;
  }

  /* Remove hover states on touch devices */
  .product-card:hover {
    transform: none;
  }

  .service-card:hover {
    transform: none;
  }

  .btn:hover {
    transform: none;
  }
}

/* ============== Print Styles ============== */
@media print {
  header,
  footer,
  .btn,
  .theme-toggle,
  .hamburger {
    display: none;
  }

  body {
    background-color: white;
    color: black;
  }

  section {
    page-break-inside: avoid;
  }

  a {
    color: #0066cc;
    text-decoration: underline;
  }
}

/* ============== Landscape Orientation ============== */
@media (max-height: 500px) and (orientation: landscape) {
  .hero {
    min-height: 60vh;
  }

  section {
    padding: var(--spacing-md) var(--spacing-lg);
  }
}

/* ============== High DPI Displays ============== */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  /* Optimize fonts for retina displays */
  body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }
}