/* ============================================================
   BRK Global Solutions — responsive.css
   Mobile-first breakpoints
   ============================================================ */

/* ---------- ≤ 1100px: expertise to 2 cols, industries 3 ---------- */
@media (max-width: 1100px) {
  .expertise-grid { grid-template-columns: repeat(2, 1fr); }
  .ind-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2.2rem; }
}

/* ---------- ≤ 980px: mobile nav, stacked hero, 2-col services ---------- */
@media (max-width: 980px) {
  .nav-toggle { display: flex; }
  .nav-phone span { display: none; }

  .site-nav {
    position: fixed;
    inset: 0 0 auto 0;
    top: 76px;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    width: 100%;
    margin-left: 0;
    background: rgba(10, 22, 40, 0.97);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    padding: 1.2rem var(--gutter) 1.8rem;
    border-bottom: 1px solid var(--line-dark);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--t-med) var(--ease), transform var(--t-med) var(--ease), visibility var(--t-med);
  }

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

  .site-nav ul {
    flex-direction: column;
    gap: 0;
    width: 100%;
  }

  .site-nav ul a {
    display: block;
    padding: 0.85rem 0;
    font-size: 1.05rem;
    border-bottom: 1px solid var(--line-dark-2);
  }

  .site-nav ul a::after { display: none; }

  .btn-nav { margin-top: 1.4rem; width: 100%; }

  .hero-inner { grid-template-columns: 1fr; }

  .hero-visual { order: -1; max-width: 340px; margin-inline: auto; }

  .hero-card-a { right: 2%; }
  .hero-card-b { left: 0; }

  .hero-stats { grid-template-columns: repeat(2, 1fr); justify-content: stretch; }

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

  .about-panel { position: static; transform: none; }

  .services-tabs {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
  }

  .service-tab { border-radius: var(--radius); }
  .service-tab::after { display: none; }

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

  .approach-track { grid-template-columns: repeat(2, 1fr); gap: 2rem 1.4rem; }
  .approach-track::before { display: none; }

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

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

/* ---------- ≤ 640px: single column, compact spacing ---------- */
@media (max-width: 640px) {
  .header-inner { gap: 1rem; height: 68px; }
  .site-nav { top: 68px; }

  .brand-mark { width: 36px; height: 36px; font-size: 1.3rem; border-radius: 9px; }
  .brand-text { font-size: 1.1rem; }

  .hero { padding-top: 7.5rem; }

  .hero-title { font-size: clamp(2.1rem, 9.5vw, 2.6rem); }

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

  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 1.4rem; }

  .hero-card { padding: 0.65rem 0.85rem; }
  .hero-card-value { font-size: 0.76rem; }
  .hero-card-kicker { font-size: 0.6rem; }

  .services-tabs { grid-template-columns: 1fr; }
  .service-tab { flex-direction: row; align-items: center; gap: 0.8rem; }

  .service-panels { border-radius: var(--radius-lg); padding: 1.5rem 1.25rem; }

  .why-grid, .expertise-grid, .ind-grid, .approach-track { grid-template-columns: 1fr; }

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

  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }

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

  .to-top { right: 1rem; bottom: 1rem; width: 42px; height: 42px; }
}

/* ---------- Small phones: tighten typography ---------- */
@media (max-width: 400px) {
  .hero-stats { grid-template-columns: 1fr 1fr; gap: 1rem; }
  .hero-stats dt { font-size: 1.5rem; }
  .marquee-track span { font-size: 0.7rem; }
}

/* ---------- Print: clean, readable ---------- */
@media print {
  .site-header, .to-top, .hero-marquee, .hero-bg, .hero-card, .cta-actions, .contact-form { display: none; }
  .hero { background: none; color: #000; padding-top: 1rem; }
  .hero-title, .cta-title { color: #000; }
  .reveal { opacity: 1 !important; transform: none !important; }
  .section { padding-block: 1.5rem; }
}