/* ==========================================================================
   VNCHIP TECHNOLOGY JSC - RESPONSIVE STYLESHEET
   Mobile, Tablet, and Desktop Breakpoints
   ========================================================================== */

/* Large Desktops / Laptops (<= 1200px) */
@media (max-width: 1200px) {
  .media-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
  }
  
  .footer-nav-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
  }
}

/* Tablets (<= 992px) */
@media (max-width: 992px) {
  .main-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(6, 15, 30, 0.98);
    backdrop-filter: blur(16px);
    flex-direction: column;
    padding: 30px var(--container-pad);
    border-bottom: 1px solid rgba(225, 82, 37, 0.3);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-20px);
    transition: all var(--transition-smooth);
    max-height: calc(100vh - 72px);
    overflow-y: auto;
  }

  .main-nav.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-links {
    flex-direction: column;
    width: 100%;
    align-items: flex-start;
    gap: 20px;
  }

  .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    background: transparent;
    border: none;
    box-shadow: none;
    padding-left: 15px;
    display: none;
  }

  .nav-item.dropdown-open .dropdown-menu {
    display: block;
  }

  .burger-btn {
    display: block;
  }

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

  .business-grid {
    grid-template-columns: 1fr;
  }

  .business-card {
    height: 340px;
  }

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

  .partners-carousel-track {
    grid-template-columns: 1fr;
  }

  .sustainable-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .cta-banner-pill {
    flex-direction: column;
    text-align: center;
    gap: 24px;
    border-radius: var(--radius-lg);
    padding: 30px;
  }

  .footer-brand-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
  }
}

/* Small Screens / Mobile (<= 600px) */
@media (max-width: 600px) {
  .section-title-tech {
    font-size: 1.7rem;
  }

  .stat-number {
    font-size: 2rem;
  }

  .pill-banner {
    border-radius: var(--radius-md);
    padding: 24px 20px;
  }

  .pill-banner p {
    font-size: 0.98rem;
  }

  .media-grid {
    grid-template-columns: 1fr;
  }

  .sustainable-cards-group {
    flex-direction: column;
  }

  .footer-nav-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .footer-bottom-row {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  /* About Us Mobile Adjustments */
  .about-hero-title {
    font-size: 2.2rem;
  }

  .overview-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .vision-cards-grid {
    grid-template-columns: 1fr;
  }

  .founder-message-box {
    grid-template-columns: 1fr;
  }

  .founder-photo-col {
    padding: 30px 20px 0;
  }

  .founder-quote-col {
    padding: 30px 24px;
  }

  .executives-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .key-team-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .conduct-cards-grid {
    grid-template-columns: 1fr;
  }

  .cleanroom-header-row {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .cleanroom-photos-grid {
    grid-template-columns: 1fr;
  }

  /* Business Mobile Adjustments */
  .biz-hero-title {
    font-size: 2.2rem;
  }

  .biz-tech-box {
    padding: 30px 20px;
    border-radius: 24px;
  }

  .biz-tech-items {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .biz-rd-top-grid {
    grid-template-columns: 1fr;
  }

  .biz-rd-subphotos {
    grid-template-columns: 1fr;
  }

  .biz-success-grid {
    grid-template-columns: 1fr;
  }

  .biz-values-quote {
    font-size: 1.1rem;
  }

  .biz-uni-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
  }

  /* Timeline mobile */
  .timeline-center-line {
    left: 20px;
  }

  .timeline-node {
    left: 20px;
    top: 6px;
  }

  .timeline-row.left-row, .timeline-row.right-row {
    justify-content: flex-start;
  }

  .timeline-content,
  .timeline-row.left-row .timeline-content,
  .timeline-row.right-row .timeline-content {
    width: calc(100% - 45px);
    margin-left: 45px;
    margin-right: 0;
    padding-right: 0;
    text-align: left;
  }
}

/* Medium Tablets (<= 992px) */
@media (max-width: 992px) and (min-width: 601px) {
  .overview-grid {
    grid-template-columns: 1fr;
  }

  .vision-cards-grid {
    grid-template-columns: 1fr;
  }

  .founder-message-box {
    grid-template-columns: 1fr;
  }

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

  .key-team-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .cleanroom-header-row {
    grid-template-columns: 1fr;
  }

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

  /* Business Tablet */
  .biz-tech-items {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .biz-rd-top-grid {
    grid-template-columns: 1fr;
  }

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

  .biz-uni-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  /* Sustainable Tablet */
  .sus-program-grid {
    gap: 24px;
  }

  .sus-cleanroom-grid {
    grid-template-columns: 1fr;
  }
}

/* Sustainable Mobile */
@media (max-width: 600px) {
  .sus-hero-title {
    font-size: 2.2rem;
  }

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

  .sus-cleanroom-grid {
    grid-template-columns: 1fr;
  }
}

/* Media Center Responsive */
@media (max-width: 992px) {
  .media-page-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
}

@media (max-width: 600px) {
  .media-hero-title {
    font-size: 2.2rem;
  }

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

  .media-filter-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .media-filter-pills {
    justify-content: center;
  }

  .media-search-form {
    width: 100%;
  }

/* Contact Page Responsive */
@media (max-width: 992px) {
  .contact-main-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

@media (max-width: 600px) {
  .contact-page-title {
    font-size: 2.2rem;
    margin-bottom: 30px;
  }

  .contact-card-box {
    padding: 30px 20px;
    border-radius: 20px;
  }

  .contact-form-grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .contact-form-full {
    grid-column: span 1;
  }
}