@media (max-width: 1023px) {
  :root {
    --header-h: 70px;
  }

  h1 {
    max-width: 12ch;
  }

  .sb-brand__text span {
    max-width: 24ch;
  }
}

@media (max-width: 859px) {
  .sb-menu-button {
    display: grid;
  }

  .sb-nav {
    position: fixed;
    top: calc(var(--header-h) + 0.75rem);
    left: 1rem;
    right: 1rem;
    display: grid;
    gap: 0.35rem;
    padding: 0.75rem;
    border: 1px solid var(--glass-border);
    border-radius: 22px;
    background:
      linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.035)),
      rgba(3, 6, 11, 0.9);
    box-shadow: var(--shadow-soft);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
    transition:
      opacity 180ms var(--ease-out),
      transform 180ms var(--ease-out);
  }

  .sb-nav.is-open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .sb-nav__link,
  .sb-nav__cta {
    width: 100%;
    justify-content: flex-start;
    margin: 0;
    padding: 0.9rem 1rem;
    color: var(--c-text);
    background: rgba(255, 255, 255, 0.035);
  }

  .sb-nav__link.is-active {
    color: var(--c-text);
    background:
      linear-gradient(135deg, rgba(94, 231, 255, 0.12), rgba(139, 92, 246, 0.08)),
      rgba(255, 255, 255, 0.05);
    box-shadow: inset 0 0 0 1px rgba(94, 231, 255, 0.14);
  }

  .sb-nav__cta {
    color: #020409;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.94), rgba(94, 231, 255, 0.88));
  }
}

@media (max-width: 719px) {
  :root {
    --header-h: 66px;
  }

  .sb-container,
  .container {
    width: min(calc(100% - 1.25rem), var(--container));
  }

  .sb-brand__mark {
    width: 42px;
    height: 42px;
    flex-basis: 42px;
  }

  .sb-brand__text span {
    max-width: 16ch;
  }

  h1 {
    max-width: 100%;
    font-size: clamp(2.25rem, 10.8vw, 3.25rem);
  }

  h2 {
    max-width: 100%;
  }

  .section,
  .sb-section {
    padding: 4rem 0;
  }

  .hero,
  .page-hero {
    padding-top: calc(var(--header-h) + 2.5rem);
  }

  .hero-panel,
  .hero-system-stage,
  .about-hero-stage,
  .developer-stage {
    min-height: 360px;
    border-radius: 24px;
  }

  .system-canvas {
    display: none;
  }

  .hero-actions,
  .cta-actions,
  .home-hero__actions,
  .home-funnel__panel .cta-actions {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    align-items: stretch;
    width: 100%;
  }

  .hero-actions .btn,
  .cta-actions .btn,
  .home-hero__actions .btn,
  .home-funnel__panel .btn,
  .form-footer .btn {
    width: 100%;
  }

  .contact-form-card,
  .cta-box,
  .glass-card,
  .proof-card,
  .service-card,
  .case-preview-card,
  .comparison-card,
  .mini-detail-card,
  .timeline-card {
    width: 100%;
    max-width: 100%;
    min-width: 0;
    border-radius: 22px;
  }

  .home-hero__layout,
  .home-transform__layout,
  .home-process__layout,
  .contact-layout,
  .contact-hero-layout,
  .home-funnel__box {
    grid-template-columns: minmax(0, 1fr);
    width: auto !important;
    margin-inline: 0.75rem;
  }

  .home-hero__copy,
  .home-hero__visual,
  .home-transform__sticky,
  .home-story-steps,
  .home-process__intro,
  .home-process__visual,
  .home-process__steps,
  .contact-intro-block,
  .contact-form-card-premium,
  .home-funnel__box > * {
    min-width: 0;
  }

  .home-hero__copy .lead,
  .contact-intro-card p,
  .contact-benefits-grid p {
    max-width: min(100%, 34ch);
    overflow-wrap: anywhere;
  }

  h1,
  h2,
  h3,
  p,
  .lead,
  .btn {
    overflow-wrap: break-word;
  }
}

@media (max-width: 420px) {
  .sb-brand__text span {
    display: none;
  }

  .sb-nav {
    left: 0.65rem;
    right: 0.65rem;
  }
}

@media (hover: none) {
  .btn:hover,
  .sb-button:hover,
  .sb-nav__link:hover {
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .ambient-canvas {
    display: none;
  }
}