/* ============================================================
   RPC INFRA PROJECTS Pvt. Ltd.
   Responsive Viewport Overrides (HTML5/CSS3)
   ============================================================ */

/* 1. Desktop & Large Tablets (max-width: 1024px) */
@media screen and (max-width: 1024px) {
  .nav-menu-list {
    gap: 1.5rem;
  }
  
  .mega-menu-wrapper {
    width: 760px;
    gap: 1.5rem;
    padding: 2rem;
  }
  
  .about-grid {
    gap: 3rem;
  }
  
  .services-alternating-row {
    gap: 3rem;
  }
  
  .equipment-split {
    gap: 2.5rem;
  }
}

/* 2. Tablets & Landscape Mobile (max-width: 991px) */
@media screen and (max-width: 991px) {
  .section {
    padding: 6rem 0;
  }
  
  /* Navigation collapse */
  .nav-menu-list {
    display: none; /* Hide desktop nav links */
  }
  
  .mobile-hamburger-btn {
    display: block; /* Show hamburger button */
  }
  
  .btn-nav-desktop {
    display: none;
  }
  
  /* Grid collapses */
  .about-grid {
    grid-template-columns: 1fr;
    gap: 4rem;
  }
  
  .services-alternating-row {
    grid-template-columns: 1fr;
    gap: 4rem;
    padding: 4rem 0;
  }
  
  .services-alternating-row.image-right .service-image-col {
    order: 1;
  }
  
  .services-alternating-row.image-right .service-content-col {
    order: 2;
  }
  
  .industries-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .process-timeline-row {
    flex-direction: column;
    gap: 3rem;
  }
  
  .process-timeline-row::after {
    display: none; /* Hide horizontal connecting line */
  }
  
  .process-step {
    width: 100%;
    flex-direction: row;
    text-align: left;
    gap: 2rem;
    align-items: start;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1.5rem;
  }
  
  .process-step:last-child {
    border-bottom: none;
    padding-bottom: 0;
  }
  
  .process-num-circle {
    margin-bottom: 0;
    flex-shrink: 0;
  }
  
  .process-step p {
    max-width: 100%;
  }
  
  .equipment-split {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .equipment-list-container {
    flex-direction: row;
    flex-wrap: wrap;
    border-left: none;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 1rem;
    gap: 10px;
  }
  
  .equipment-item-nav {
    padding: 10px 20px;
    font-size: 11px;
  }
  
  .equipment-item-nav::after {
    left: 0;
    right: 0;
    bottom: -12px;
    top: auto;
    height: 2px;
    width: auto;
  }
  
  .why-grid-container {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .editorial-split {
    grid-template-columns: 1fr;
    gap: 4rem;
  }
  
  .contact-split-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .contact-info-panel, .contact-form-panel {
    grid-column: span 12;
  }
  
  .footer-columns-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 3rem;
  }
}

/* 3. Small Mobile Devices (max-width: 767px) */
@media screen and (max-width: 767px) {
  .section {
    padding: 4rem 0;
  }
  
  h1 {
    font-size: clamp(2rem, 8vw, 3rem);
  }
  
  .hero-cta-row {
    flex-direction: column;
    gap: 1rem;
    width: 100%;
  }
  
  .hero-cta-row .btn {
    width: 100%;
  }
  
  .hero-location-badge {
    display: none; /* Hide on small viewports */
  }
  
  .service-spec-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .industries-grid {
    grid-template-columns: 1fr;
  }
  
  .why-grid-container {
    grid-template-columns: 1fr;
  }
  
  .footer-columns-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  
  .footer-bottom-bar {
    flex-direction: column;
    gap: 1.5rem;
    text-align: center;
  }
  
  .footer-legal-links {
    justify-content: center;
    width: 100%;
  }
}

/* 4. Ultra Small Screens (max-width: 480px) */
@media screen and (max-width: 480px) {
  .form-grid {
    grid-template-columns: 1fr;
  }
  
  .form-col-full {
    grid-column: span 1;
  }
  
  .logo-main {
    font-size: 18px;
  }
  
  .logo-main span {
    font-size: 14px;
  }
  
  .logo-sub {
    font-size: 8px;
    letter-spacing: 0.18em;
  }
}

/* Mobile full drawer menu styling */
.mobile-overlay-menu {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-dark);
  z-index: 95;
  display: none;
  flex-direction: column;
  justify-content: space-between;
  padding: 8rem 2rem 4rem;
  opacity: 0;
  transform: translateY(-20px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.mobile-overlay-menu.open {
  display: flex;
  opacity: 1;
  transform: translateY(0);
}

.mobile-overlay-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.8rem;
}

.mobile-overlay-links a {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 800;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.6);
  letter-spacing: -0.03em;
  display: block;
}

.mobile-overlay-links a:hover, .mobile-overlay-links li.active a {
  color: var(--bg-white);
}

.mobile-overlay-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 2rem;
}

.mobile-overlay-coord {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}

.mobile-overlay-coord a {
  color: rgba(255, 255, 255, 0.6);
  font-weight: 700;
}