/* ==========================================================================
   MAYUR BIKASH GOGOI - RESPONSIVE & MOBILE NAVIGATION
   60fps smooth mobile layout, no jitter, elegant mobile drawer
   ========================================================================== */

/* Tablet & Medium Screens (max-width: 960px) */
@media (max-width: 960px) {
  .hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 36px;
  }

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

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

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

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

/* Mobile Screens (max-width: 768px) */
@media (max-width: 768px) {
  :root {
    --header-height: 62px;
  }

  .section {
    padding-top: 52px;
    padding-bottom: 52px;
  }

  .section-title {
    font-size: 1.875rem;
  }

  .hero-section {
    padding-top: 36px;
    padding-bottom: 52px;
  }

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

  .hero-photo-wrapper {
    order: -1;
  }

  .hero-photo-card {
    max-width: 260px;
    margin: 0 auto;
  }

  .hero-headline {
    font-size: 2.25rem;
  }

  /* Sleek, Fast Mobile Menu */
  .mobile-menu-btn {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--nav-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--nav-border);
    padding: 16px 20px 24px;
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.1);
    opacity: 0;
    visibility: hidden;
    transform: translate3d(0, -12px, 0);
    transition: opacity 0.25s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.25s cubic-bezier(0.16, 1, 0.3, 1),
                visibility 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 999;
    will-change: transform, opacity;
  }

  .nav-menu.open {
    opacity: 1;
    visibility: visible;
    transform: translate3d(0, 0, 0);
  }

  .nav-links {
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    width: 100%;
  }

  .nav-link {
    font-size: 0.84rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 11px 14px;
    width: 100%;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    background-color: transparent;
    display: flex;
    align-items: center;
    justify-content: space-between;
  }

  .nav-link:hover {
    color: var(--text-primary);
    background-color: var(--surface-alt);
  }

  .nav-link.active {
    background-color: var(--surface-alt);
    color: var(--text-primary);
    border-left: 3px solid var(--text-primary);
  }

  .nav-link::after {
    display: none;
  }

  .nav-item {
    width: 100%;
    flex-direction: column;
    align-items: stretch;
  }

  .nav-item.dropdown {
    flex-direction: column;
    align-items: stretch;
  }

  .nav-item.dropdown .dropdown-menu {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    box-shadow: none;
    border: none;
    background-color: transparent;
    padding: 2px 0 6px 14px;
    margin: 2px 0 6px;
    border-left: 2px solid var(--surface-border);
  }

  .dropdown-chevron {
    display: none;
  }

  .dropdown-link {
    padding: 9px 12px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    border-radius: var(--radius-sm);
  }

  .announcement-bar {
    font-size: 0.7rem;
    letter-spacing: 0.06em;
    padding-right: 32px;
  }

  .skills-container,
  .projects-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

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

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

  .footer-top {
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}

/* Small Smartphone (max-width: 500px) */
@media (max-width: 500px) {
  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .hero-headline {
    font-size: 1.95rem;
  }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }

  .hero-cta-group .btn {
    width: 100%;
  }

  .project-actions {
    flex-direction: column;
    width: 100%;
  }

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

  .highlight-card {
    padding: 18px;
  }

  .contact-info-card,
  .contact-form-card {
    padding: 22px 18px;
  }
}