/* ==========================================================================
   13. RESPONSIVE & MOTION PREFERENCES
   One block per breakpoint, ordered largest to smallest so later rules
   always win. This file must load last.
   ========================================================================== */

/* --------------------------------------------------------------------------
   Large desktop
   -------------------------------------------------------------------------- */
@media (min-width: 1441px) {
  :root { --container-max: 1320px; }
}

/* Desktop-only navigation */
@media (min-width: 901px) {
  .nav-mobile-cta { display: none; }
}

/* --------------------------------------------------------------------------
   Laptop / small desktop
   -------------------------------------------------------------------------- */
@media (max-width: 1180px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .overview-chips { grid-template-columns: repeat(2, 1fr); }
  .approach-track { grid-template-columns: repeat(2, 1fr); }
  .approach-connector { display: none; }
  .partner-left,
  .partner-right { padding: var(--sp-6) var(--sp-4); }
}

/* --------------------------------------------------------------------------
   Tablet
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .grid-2 { grid-template-columns: 1fr; gap: var(--sp-5); }

  .hero-content { text-align: center; margin-inline: auto; }
  .hero-sub { margin-inline: auto; }
  .btn-row { justify-content: center; }

  .vm-grid { grid-template-columns: 1fr; gap: var(--sp-5); }
  .vm-block p { margin-inline: auto; }

  .partner-split { grid-template-columns: 1fr; }
  .partner-left { padding-bottom: var(--sp-5); }

  .journey-track { grid-template-columns: repeat(3, 1fr); row-gap: var(--sp-5); }
  .journey-line { display: none; }

  .highlights-panel { grid-template-columns: 1fr; text-align: left; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

/* --------------------------------------------------------------------------
   Small tablet — navbar collapses into the mobile drawer here
   -------------------------------------------------------------------------- */
@media (max-width: 900px) {
  .nav-links {
    position: fixed;
    top: calc(var(--nav-height) + var(--announce-height));
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--white);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    padding: var(--sp-2) clamp(20px, 4vw, 48px) var(--sp-4);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: transform var(--dur-med) var(--ease), opacity var(--dur-med) var(--ease), visibility var(--dur-med);
  }
  .nav-links.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }
  .nav-links a {
    display: block;
    padding: 14px 4px;
    border-bottom: 1px solid var(--border);
    font-size: 1rem;
  }
  .nav-links a::after { display: none; }
  .nav-cta .btn-primary { display: none; }
  .nav-links .nav-mobile-cta { display: flex; margin-top: var(--sp-2); }
  /* `.nav-links a` outranks `.btn-primary`, so the drawer CTA needs its
     button colours restated or it renders navy text on a navy fill. */
  .nav-links .nav-mobile-cta .btn {
    display: inline-flex;
    border-bottom: none;
  }
  .nav-links .nav-mobile-cta .btn-primary { color: var(--white); }
  .nav-toggle { display: flex; }

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

/* --------------------------------------------------------------------------
   Mobile
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
  :root { --nav-height: 68px; }

  .section-pad { padding-block: var(--sp-6); }
  .grid-3 { grid-template-columns: 1fr; }
  .overview-chips { grid-template-columns: 1fr; }

  .hero { min-height: min(600px, 92vh); }
  .hero-overlay { background: rgba(10, 25, 48, 0.68); }

  .approach-track { grid-template-columns: 1fr; }
  .journey-track { grid-template-columns: 1fr; row-gap: var(--sp-4); }

  .cta-section {
    margin-inline: 12px;
    margin-block: var(--sp-5);
    padding: var(--sp-6) var(--sp-3);
  }

  .newsletter-panel { flex-direction: column; align-items: stretch; text-align: center; }
  .newsletter-form { justify-content: center; min-width: 0; }
  .newsletter-form input { min-width: 0; }

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

  .announce-bar { font-size: 0.75rem; padding-inline: var(--sp-2); }
  .footer-grid { grid-template-columns: 1fr; gap: var(--sp-4); }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

/* --------------------------------------------------------------------------
   Small mobile — buttons go full width and stack
   -------------------------------------------------------------------------- */
@media (max-width: 480px) {
  .btn { width: 100%; }
  .btn-row { flex-direction: column; }
  .cta-actions { flex-direction: column; }
  .newsletter-form { flex-direction: column; }
  .tech-feature-grid { grid-template-columns: 1fr; }
}

@media (max-width: 380px) {
  h1 { font-size: 2.1rem; }
}

/* --------------------------------------------------------------------------
   Reduced motion
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
}