/* ============================================
   Granite Elite Intel — Responsive Styles
   Mobile-first responsive adjustments
   ============================================ */

/* ============ MAX 1280px — Wide Desktop ============ */
@media (max-width: 1280px) {
  .footer-grid {
    grid-template-columns: 1.3fr repeat(3, 1fr);
    gap: var(--space-8);
  }
}


/* ============ MAX 1024px — Desktop / Large Tablet ============ */
@media (max-width: 1024px) {
  /* Elevate header above all content when mobile nav is open.
     backdrop-filter creates a containing block that traps
     position:fixed children — must be removed. */
  .site-header.nav-open {
    z-index: 10001;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }

  /* ---- Mobile Nav: dark overlay + card panel ---- */
  .main-nav {
    position: fixed;
    inset: 0;
    background: rgba(5, 6, 10, 0.6);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: stretch;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding: 80px 16px 40px;
    transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                visibility 0.3s;
  }

  .main-nav.open {
    opacity: 1;
    visibility: visible;
  }

  /* Nav items sit inside a dark card panel */
  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
    max-width: 520px;
    margin: 0 auto;
    background: rgba(22, 27, 38, 0.95);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: 6px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4),
                0 4px 16px rgba(0, 0, 0, 0.25);
  }

  .nav-item {
    border-bottom: none;
  }

  .nav-item:last-child {
    border-bottom: none;
  }

  .nav-link {
    font-size: 15px;
    font-weight: 500;
    padding: 14px 16px;
    color: rgba(255, 255, 255, 0.85);
    text-align: left;
    width: 100%;
    justify-content: space-between;
    letter-spacing: 0.01em;
    text-transform: none;
    border-radius: 10px;
    transition: background-color 0.2s ease, color 0.2s ease;
  }

  .nav-link:hover {
    color: #ffffff;
    background-color: rgba(255, 255, 255, 0.08);
  }

  .nav-link--active {
    color: #ffffff;
    background-color: rgba(0, 87, 184, 0.2);
  }

  .nav-link .nav-arrow {
    width: 12px;
    height: 12px;
    opacity: 0.4;
    transition: transform 0.3s ease, opacity 0.3s ease;
  }

  .nav-item.open .nav-arrow {
    opacity: 0.9;
    transform: rotate(180deg);
  }

  .menu-toggle {
    display: flex;
    z-index: 10000;
  }

  .header-cta {
    display: none;
  }

  /* Dropdown — inline expansion within the card */
  .nav-item--dropdown {
    flex-direction: column;
  }

  .dropdown-menu {
    position: static;
    transform: none;
    min-width: auto;
    width: 100%;
    opacity: 0;
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    background: rgba(255, 255, 255, 0.04);
    border: none;
    box-shadow: none;
    padding: 0;
    margin: 0 0 4px 0;
    border-radius: 10px;
    transition: opacity 0.25s ease,
                max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1),
                visibility 0.25s,
                padding 0.25s ease;
  }

  .nav-item.open .dropdown-menu,
  .nav-item:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    max-height: 600px;
    padding: 4px 4px 4px 12px;
    pointer-events: auto;
    transform: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }

  .dropdown-link {
    display: block;
    text-align: left;
    color: rgba(255, 255, 255, 0.55);
    font-size: 14px;
    font-weight: 400;
    padding: 10px 14px;
    text-transform: none;
    letter-spacing: 0.01em;
    border-radius: 8px;
    transition: color 0.2s ease, background-color 0.2s ease;
  }

  .dropdown-link:hover {
    color: rgba(255, 255, 255, 0.9);
    background-color: rgba(255, 255, 255, 0.06);
  }

  /* Grid adjustments */
  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid--5 {
    grid-template-columns: repeat(3, 1fr);
  }

  .grid--split,
  .grid--split-wide,
  .grid--split-narrow {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }

  /* About page */
  .about-intro {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }

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

  /* Contact page */
  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }

  .contact-info {
    position: static;
  }

  /* Footer */
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }

  .footer-brand {
    grid-column: 1 / -1;
    padding-right: 0;
  }

  /* Stats */
  .stats-strip {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
  }
}


/* ============ MAX 768px — Tablet ============ */
@media (max-width: 768px) {
  /* Typography scale down */
  h1 { font-size: var(--text-4xl); }
  h2 { font-size: var(--text-3xl); }
  h3 { font-size: var(--text-xl); }

  /* Hero */
  .hero {
    min-height: 60vh;
    padding: calc(var(--header-height) + var(--space-12)) 0 var(--space-12);
  }

  .hero--full {
    min-height: 85vh;
  }

  .hero__content p {
    font-size: var(--text-lg);
  }

  .hero__actions {
    flex-direction: column;
    align-items: flex-start;
  }

  /* Grid adjustments */
  .grid--3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid--auto-fill,
  .grid--auto-fit {
    grid-template-columns: 1fr;
  }

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

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

  /* Sectors */
  .sectors-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  /* Case studies */
  .case-studies-grid {
    grid-template-columns: 1fr;
  }

  /* Insights */
  .insights-grid {
    grid-template-columns: 1fr;
  }

  /* Filter bar */
  .filter-bar {
    gap: var(--space-2);
  }

  .filter-btn {
    font-size: var(--text-xs);
    padding: var(--space-2) var(--space-4);
  }

  /* Footer */
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
  }

  .footer-legal {
    justify-content: center;
  }
}


/* ============ MAX 480px — Mobile ============ */
@media (max-width: 480px) {
  /* Tighter container padding */
  .container {
    padding-left: var(--space-5);
    padding-right: var(--space-5);
  }

  /* Typography */
  h1 { font-size: var(--text-3xl); }
  h2 { font-size: var(--text-2xl); }

  .home-hero .hero__content h1 {
    font-size: var(--text-4xl);
  }

  /* Buttons */
  .btn {
    width: 100%;
    justify-content: center;
  }

  .btn--ghost {
    width: auto;
  }

  /* Grids */
  .grid--2,
  .grid--3,
  .grid--4,
  .grid--5 {
    grid-template-columns: 1fr;
  }

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

  .sectors-strip {
    grid-template-columns: 1fr;
  }

  /* Stats strip */
  .stats-strip {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .stat-item {
    padding: var(--space-4) 0;
    border-bottom: var(--border-subtle);
  }

  .stat-item:last-child {
    border-bottom: none;
  }

  /* Cards */
  .card {
    padding: var(--space-6);
  }

  .services-grid .card {
    padding: var(--space-8);
  }

  .card--horizontal {
    grid-template-columns: 1fr;
  }

  /* Contact form */
  .contact-form-wrapper {
    padding: var(--space-6);
  }

  .contact-info-card {
    padding: var(--space-6);
  }

  /* Service list */
  .service-list {
    grid-template-columns: 1fr;
  }

  /* Sector detail challenges */
  .sector-detail__challenges ul {
    grid-template-columns: 1fr;
  }

  /* Hero mesh orbs — smaller on mobile */
  .hero-mesh__orb--1 {
    width: 300px;
    height: 300px;
  }

  .hero-mesh__orb--2 {
    width: 250px;
    height: 250px;
  }

  .hero-mesh__orb--3 {
    width: 200px;
    height: 200px;
  }

  /* Logo text */
  .site-logo__tagline {
    display: none;
  }

  /* Section padding reduce */
  .section {
    padding: clamp(2.5rem, 4vw, 4rem) 0;
  }

  /* Breadcrumbs */
  .breadcrumbs {
    font-size: var(--text-xs);
  }
}