/* ==========================================================================
   Neosilica Energy Solutions — responsive.css
   Breakpoints
     Desktop  ≥ 1440px   design scale (fluid down from 1920 artboard)
     Laptop   1200–1439
     Tablet   768–1199
     Mobile   ≤ 767   (small mobile ≤ 575)
   ========================================================================== */

/* ---------- Up to desktop-small (≤1599) ---------- */
@media (max-width: 1599.98px) {
  .site-header__brand,
  .site-header__actions { flex: 1 1 0; width: auto; }
  .site-nav__list { gap: clamp(20px, 2.2vw, 48px); }
  .site-header__brand { min-width: 150px; }
}

/* ---------- Laptop (≤1439) ---------- */
@media (max-width: 1439.98px) {
  .trust__metrics { column-gap: 32px; row-gap: 0; }
  .scale__list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); row-gap: 40px; }
  /* Solutions: slightly narrower image column */
  .sol { grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: var(--gap-64); }
}

/* ---------- Ecosystem map collapses to hub + node list (≤1279) ---------- */
@media (max-width: 1279.98px) {
  .eco { aspect-ratio: auto; display: flex; flex-direction: column; align-items: center; gap: 48px; container-type: normal; }
  .eco__glow, .eco__connectors { display: none; }
  .eco__hub { position: relative; left: auto; top: auto; width: 260px; }
  .eco__hub .heading-s { font-size: 1.375rem; }
  .eco__hub .label { font-size: var(--fs-label); }
  .eco__nodes { position: static; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 40px 32px; width: 100%; }
  .eco-node { position: static; width: auto; padding-top: 28px; border-top: 1px solid rgba(255,255,255,.16); }
  .eco-node .heading-s { font-size: var(--fs-s); }
  .eco-node .label { font-size: var(--fs-label); }
  .eco-node .body-sm { font-size: var(--fs-body-sm); }
  .eco-node--iot { order: 1; } .eco-node--scada { order: 2; } .eco-node--ems { order: 3; }
  .eco-node--apm { order: 4; } .eco-node--analytics { order: 5; } .eco-node--ams { order: 6; }
  .eco-node__point { width: 68px; height: 68px; }
  .eco-node { gap: 10px; }
}

/* ---------- Tablet & below (≤1199): mobile navigation, stacked layouts ---------- */
@media (max-width: 1199.98px) {
  :root { --header-h: 80px; }

  .br-lg { display: none; }

  /* Header */
  .site-nav { display: none; }
  .site-header__brand { height: 48px; }
  .site-header__brand .logo { width: 130px; }
  .nav-toggle {
    position: relative; display: inline-flex; flex-direction: column; align-items: center; justify-content: center; gap: 7px;
    width: 44px; height: 44px; padding: 0; border: 0; background: transparent; cursor: pointer;
  }
  .nav-toggle__bar { display: block; width: 24px; height: 1.5px; background: var(--ink); transition: transform .35s var(--ease-out); }
  .site-header.menu-open .nav-toggle__bar:first-child { transform: translateY(4.25px) rotate(45deg); }
  .site-header.menu-open .nav-toggle__bar:last-child { transform: translateY(-4.25px) rotate(-45deg); }

  .mobile-menu {
    position: fixed; top: var(--header-h); left: 0; right: 0; bottom: 0;
    display: flex; flex-direction: column; justify-content: space-between; gap: 40px;
    padding: 32px var(--pad-x) 40px; background: var(--white); overflow-y: auto;
  }
  .mobile-menu[hidden] { display: none; }
  .mobile-menu__list { list-style: none; margin: 0; padding: 0; }
  .mobile-menu__list a {
    display: block; padding: 18px 0; border-bottom: 1px solid var(--stone);
    font-size: clamp(1.5rem, 4vw, 2.125rem); font-weight: 500; line-height: 1.2; letter-spacing: -0.012em; color: var(--ink);
  }
  .mobile-menu__list a:hover, .mobile-menu__list a.is-active { color: var(--red-text); }
  .mobile-menu:not([hidden]) { animation: menu-in .35s var(--ease-out); }
  .mobile-menu .btn-primary-ns { align-self: flex-start; }
  body.menu-is-open { overflow: hidden; }

  /* Section headers stack */
  .section-head { flex-direction: column; align-items: flex-start; gap: 24px; }
  .section-head__title, .section-head__lead { flex: none; max-width: 760px; }

  /* Who */
  .who__intro { grid-template-columns: minmax(0, 1fr); gap: 48px; }
  .who__copy { max-width: 820px; }
  .who__media { margin-left: 0; width: 100%; aspect-ratio: 16 / 10; }

  /* Track record */
  .trusted__labels { flex-direction: column; gap: 14px; }
  .trusted { --logo-k: .612; --logo-gap: 48px; }
  .client-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }

  /* Solutions: image on top, content full width */
  .sol { grid-template-columns: minmax(0, 1fr); gap: 40px; min-height: 0; padding-block: clamp(2.25rem, 5vw, 3rem); }
  #digital-solutions { padding-top: clamp(3.5rem, 8vw, 4.5rem); }
  .sol__media { order: -1; height: clamp(15rem, 48vw, 26rem); }

  .flows { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: 40px; }
  .cyber { align-items: flex-start; }
  .cyber__dot { margin-top: 6px; }

  /* Leadership */
  .leaders { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* ---------- Tablet portrait (≤991) ---------- */
@media (max-width: 991.98px) {
  .br-md { display: none; }

  .eco__nodes { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .cta__strip { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .cta { gap: 80px; }
}

/* ---------- Mobile (≤767) ---------- */
@media (max-width: 767.98px) {
  :root { --header-h: 72px; }

  .site-header__brand .logo { width: 116px; }
  .btn-connect { padding: 11px 14px; }

  /* Hero */
  .hero__content .hero__tags { display: grid; grid-template-columns: repeat(3, max-content); gap: 10px 22px; margin-top: 22px; white-space: nowrap; letter-spacing: .12em; }
  .hero__tags li:not(:last-child)::after { content: none; }
  .hero__cta { margin-top: 32px; }

  .btn-primary-ns, .btn-secondary-ns { padding: 17px 22px; }

  /* Who */
  .scale__list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 20px; row-gap: 32px; }
  .who__statement, .sec-title { font-size: calc(clamp(1.5rem, 6.4vw, 1.875rem) * .95); line-height: 1.2; }

  /* Track record */
  .trust__metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 20px; }
  .metric-dark { padding-block: 20px; }
  .trusted { --logo-k: .522; --logo-gap: 36px; }
  .client-grid { gap: 10px; }
  .client-tile { height: 84px; padding: 10px; }
  .client-tile img { max-height: 46px; width: auto !important; }

  /* Solutions */
  .sol-cards--2 { grid-template-columns: minmax(0, 1fr); }
  .process { grid-template-columns: repeat(3, minmax(0, 1fr)); row-gap: 28px; }
  .process__step::before { display: none; }

  /* Technology */
  .eco__nodes { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .eco__hub { width: 220px; gap: 8px; }
  .eco__hub .heading-s { font-size: 1.25rem; }
  .flows { grid-template-columns: minmax(0, 1fr); gap: 32px; }

  /* Leadership */
  .leaders { grid-template-columns: minmax(0, 1fr); }
  .leader { padding: 16px; gap: 18px; }

  /* CTA */
  .cta__title { font-size: clamp(2rem, 8.5vw, 2.5rem); line-height: 1.1; }
  .cta__content { gap: 24px; }

  /* Drawer */
  .contact-drawer__top { padding: 24px 24px 0; }
  .contact-drawer__body { padding: 24px 24px 40px; gap: 24px; }
}

/* ---------- Small mobile (≤575) ---------- */
@media (max-width: 575.98px) {
  .site-header__actions .btn-connect { display: none; }

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

  .tier-row { grid-template-columns: minmax(0, 1fr); }
  .tier-row__name { flex-direction: row; justify-content: flex-start; align-items: baseline; gap: 10px; padding: 14px 18px 0; background: transparent; }
  .tier-row .dot-list { padding: 8px 18px 16px; }
  .process { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .dot-list--grid { grid-template-columns: minmax(0, 1fr); }
  .sol-card { padding: 20px 20px 22px; }
  .cyber { gap: 14px; letter-spacing: .12em; }
}