/**
 * Openfield Operations
 * Responsive Breakpoints & Layout Adaptations
 */

/* ==========================================================================
   Breakpoints:
   - <= 1024px: Tablet Landscape / Small Desktop
   - <= 768px:  Tablet Portrait
   - <= 480px:  Mobile
   ========================================================================== */

@media (max-width: 1024px) {
  :root {
    --container-padding: 20px;
    --space-3xl: 72px;
    --space-2xl: 48px;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .services-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 22px;
  }

  .portfolio-overview-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .portfolio-overview-content {
    max-width: 100%;
  }

  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }

  .contact-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .service-detail-layout {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .capabilities-panel {
    position: static;
  }
}

@media (min-width: 861px) {
  .mobile-menu-overlay,
  .mobile-menu-drawer,
  .menu-toggle {
    display: none !important;
    visibility: hidden !important;
  }
}

@media (max-width: 860px) {
  .header-topbar {
    display: none;
  }

  .header-nav {
    display: none;
  }

  .header-phone {
    display: none;
  }

  .menu-toggle {
    display: flex !important;
  }

  /* Mobile Navigation Drawer / Overlay */
  .mobile-menu-overlay {
    display: block !important;
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    height: calc(100vh - var(--header-height));
    background-color: rgba(23, 32, 28, 0.45);
    backdrop-filter: blur(4px);
    z-index: 998;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity var(--transition-fast), visibility var(--transition-fast);
  }

  .mobile-menu-overlay.is-open {
    opacity: 1;
    visibility: visible !important;
    pointer-events: auto;
  }

  .mobile-menu-drawer {
    display: flex !important;
    position: fixed;
    top: var(--header-height);
    right: 0;
    width: 100%;
    max-width: 380px;
    height: calc(100vh - var(--header-height));
    background-color: var(--color-bg);
    border-left: 1px solid var(--color-border);
    z-index: 999;
    padding: 32px 24px;
    flex-direction: column;
    justify-content: space-between;
    transform: translateX(100%);
    transition: transform var(--transition-normal), visibility var(--transition-normal);
    overflow-y: auto;
    visibility: hidden;
  }

  .mobile-menu-drawer.is-open {
    transform: translateX(0);
    visibility: visible !important;
  }

  .mobile-nav-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
  }

  .mobile-nav-link {
    display: block;
    font-size: 1.15rem;
    font-weight: 500;
    color: var(--color-primary-dark);
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    min-height: 48px;
    display: flex;
    align-items: center;
    transition: background-color var(--transition-fast), color var(--transition-fast);
  }

  .mobile-nav-link:hover,
  .mobile-nav-link.is-active {
    background-color: var(--color-accent-light);
    color: var(--color-primary-dark);
  }

  .mobile-nav-link.is-active {
    font-weight: 600;
  }

  .mobile-drawer-footer {
    margin-top: 40px;
    padding-top: 24px;
    border-top: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    gap: 16px;
  }

  .mobile-phone-link {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-primary-dark);
    display: flex;
    align-items: center;
    min-height: 44px;
  }

  .mobile-cta-btn {
    width: 100%;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .hero-image-frame {
    width: 100%;
    max-width: 100%;
  }

  .intro-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .about-split-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .approach-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .environments-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .cta-box {
    flex-direction: column;
    align-items: flex-start;
    padding: 32px 24px;
  }

  .cta-action {
    width: 100%;
  }

  .cta-action .btn {
    width: 100%;
  }
}

@media (max-width: 640px) {
  :root {
    --container-padding: 16px;
    --header-height: 72px;
    --space-3xl: 52px;
    --space-2xl: 36px;
    --space-xl: 28px;
  }

  .hero-section {
    padding: var(--space-xl) 0;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .hero-content {
    padding: 24px 18px;
  }

  .hero-headline {
    font-size: 24px;
    line-height: 1.3;
  }

  .hero-lead {
    font-size: 15px;
    line-height: 1.6;
    margin-bottom: 20px;
  }

  .hero-image-frame {
    width: 100%;
    max-width: 100%;
    margin: 0 auto;
  }

  .hero-image-frame img {
    aspect-ratio: 16 / 10;
  }

  .services-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .about-focus-grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .form-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .hero-actions .link-arrow {
    justify-content: center;
    padding: 10px 0;
  }

  .contact-form-panel {
    padding: 24px 18px;
  }

  .contact-info-panel {
    padding: 24px 18px;
  }

  .legal-article {
    padding: 24px 18px;
  }

  .error-hero-card {
    padding: 28px 20px;
  }
}

@media (max-width: 480px) {
  .hero-content {
    padding: 20px 16px;
  }

  .hero-headline {
    font-size: 21px;
  }

  .hero-lead {
    font-size: 14px;
  }
}