/* ==========================================================================
   RelayRuntime Landing Page — Responsive
   Desktop · Tablet (≤1024) · Mobile (≤768) · Small (≤420)
   ========================================================================== */

/* Mid desktop: ease 5-up deploy */
@media (max-width: 1200px) {
  .deploy-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* Tablet */
@media (max-width: 1024px) {
  :root {
    --header-h: 72px;
  }

  .brand__logo {
    height: 44px;
    max-width: min(230px, 40vw);
  }

  .container,
  .container--narrow,
  .nav {
    width: min(100% - 2.25rem, var(--container));
  }

  .hero__grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.75rem;
  }

  .hero h1 {
    max-width: none;
    font-size: clamp(2.05rem, 3.8vw, 2.7rem);
  }

  .hero__sub {
    font-size: 1.05rem;
  }

  .section {
    padding: 4.75rem 0;
  }

  .section__header {
    margin-bottom: 2.5rem;
  }

  .card-grid--3,
  .deploy-grid,
  .solution-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .split {
    grid-template-columns: 1fr;
    gap: 2.25rem;
  }

  .split__content {
    text-align: center;
    max-width: 560px;
    margin-inline: auto;
  }

  .split__content h2,
  .section__lead--left,
  .positioning-line {
    text-align: center;
    margin-inline: auto;
  }

  .split__content h2 {
    max-width: none;
  }

  .feature-checklist {
    max-width: 420px;
    margin-inline: auto;
    text-align: left;
  }

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

  .experience-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.25rem;
  }

  .provider-card {
    flex-basis: calc(50% - 0.9rem);
    max-width: none;
  }

  .footer__grid {
    flex-direction: column;
    gap: 1.75rem;
  }

  .footer__nav {
    justify-content: flex-start;
    max-width: none;
  }
}

/* Narrow tablet / large phone: stack hero before content becomes cramped */
@media (max-width: 900px) {
  .hero__grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .hero h1 {
    max-width: none;
  }

  .hero-media__trigger {
    aspect-ratio: 16 / 10;
  }

  .hero-media__img {
    object-position: 75% 40%;
  }
}

/* Mobile */
@media (max-width: 768px) {
  .container,
  .container--narrow,
  .nav {
    width: min(100% - 1.5rem, var(--container));
  }

  /* Mobile brand: AppIcon + RelayRuntime text */
  .brand--desktop {
    display: none;
  }

  .brand--mobile {
    display: inline-flex;
  }

  .nav__toggle {
    display: inline-flex;
  }

  .nav__menu {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    z-index: 95;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    padding: 0.85rem 1.15rem 1.35rem;
    background: rgba(255, 255, 255, 0.98);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 18px 40px rgba(15, 23, 42, 0.12);
  }

  .nav__menu.is-open {
    display: flex;
  }

  .nav__menu li {
    width: 100%;
  }

  .nav__menu a:not(.btn) {
    display: flex;
    width: 100%;
    padding: 0.95rem 0.35rem;
    border-bottom: 1px solid #f1f5f9;
  }

  .nav__menu .btn {
    width: 100%;
    margin: 0.85rem 0 0;
  }

  .hero {
    padding: 3rem 0 2.75rem;
  }

  .hero__grid {
    grid-template-columns: 1fr;
    gap: 2.25rem;
  }

  .hero h1 {
    font-size: clamp(2.1rem, 9vw, 2.6rem);
  }

  .hero__actions,
  .cta__actions {
    flex-direction: column;
  }

  .hero__actions .btn,
  .cta__actions .btn {
    width: 100%;
  }

  .card-grid--3,
  .deploy-grid,
  .solution-list,
  .experience-grid,
  .abstraction-diagram__providers,
  .feature-checklist {
    grid-template-columns: 1fr;
  }

  .provider-card {
    flex-basis: 100%;
    max-width: none;
  }

  .section {
    padding: 3.75rem 0;
  }

  .section__header {
    margin-bottom: 2rem;
  }

  .section__header h2,
  .section h2 {
    font-size: clamp(1.7rem, 7vw, 2.15rem);
  }

  .section__lead,
  .cta__sub,
  .hero__sub {
    font-size: 1.05rem;
  }

  .solution-panel {
    padding: 1.15rem;
  }

  .abstraction-node--top,
  .abstraction-node--runtime {
    width: 100%;
    min-width: 0;
  }

  .experience-card__body {
    padding-top: 1rem;
  }

  .cta {
    padding: 3.75rem 0;
  }

  .footer__nav {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.15rem;
  }

  .footer__nav a {
    width: 100%;
  }

  .browser-frame__url {
    display: none;
  }
}

/* Small phones */
@media (max-width: 420px) {
  .hero {
    padding: 2.6rem 0 2.4rem;
  }

  .brand__name {
    font-size: 1.05rem;
  }

  .brand__appicon {
    width: 36px;
    height: 36px;
  }

  .brand--mobile {
    gap: 0.65rem;
  }

  .card {
    padding: 1.25rem 1.1rem;
  }

  .provider-card {
    min-height: 80px;
  }

  .hero-media__trigger,
  .browser-frame {
    border-radius: 12px;
  }
}