@media (max-width: 1100px) {
  .nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    z-index: 45;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    padding: 12px;
    max-height: calc(100vh - var(--header-h));
    overflow: auto;
    transform: translateY(-110%);
    visibility: hidden;
    pointer-events: none;
    transition: transform 0.42s cubic-bezier(0.22, 1, 0.32, 1), visibility 0s linear 0.42s;
  }

  .nav.is-open {
    transform: translateY(0);
    visibility: visible;
    pointer-events: auto;
    transition: transform 0.42s cubic-bezier(0.22, 1, 0.32, 1), visibility 0s;
  }

  @media (prefers-reduced-motion: reduce) {
    .nav,
    .nav.is-open {
      transition: none;
    }
  }

  .nav a,
  .nav .btn {
    min-height: 48px;
    padding: 12px;
  }

  .menu-toggle {
    display: grid;
    place-items: center;
  }

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

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

@media (max-width: 900px) {
  .hero-grid,
  .modal-grid {
    grid-template-columns: 1fr;
  }

  .compare-wrap,
  .contact-cards {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .footer-grid > :first-child {
    grid-column: 1 / -1;
  }

  .hero-grid {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .hero-intro {
    display: contents;
  }

  .hero-copy-block {
    order: 1;
    width: 100%;
  }

  .hero-visual {
    order: 2;
    min-height: 280px;
    width: 100%;
  }

  .hero-actions {
    order: 3;
    width: 100%;
    justify-content: center;
    margin-top: 8px;
  }

  .hero .hero-copy {
    max-width: 36em;
    margin-inline: auto;
  }

  .speed-gauge {
    width: min(100%, 340px);
  }

  .modal-close {
    float: none;
    position: absolute;
    top: 10px;
    left: 10px;
    margin: 0;
  }

  .modal-content {
    padding: 20px 18px 22px;
  }
}

@media (max-width: 640px) {
  .section {
    padding: 56px 0;
  }

  .check-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .check-item {
    min-height: 96px;
    padding: 12px;
    font-size: 0.92rem;
  }

  .product-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .product-card {
    border: 1.5px solid rgba(11, 21, 38, 0.22);
    border-radius: 16px;
    box-shadow: none;
  }

  .product-card .product-body {
    padding: 10px;
    gap: 6px;
  }

  .product-card h3 {
    font-size: 0.88rem;
    line-height: 1.45;
  }

  .product-card p {
    font-size: 0.78rem;
    line-height: 1.55;
  }

  .product-card .price {
    font-size: 0.82rem;
  }

  .product-card .btn {
    min-height: 40px;
    padding: 8px 10px;
    font-size: 0.8rem;
  }

  .product-grid {
    align-items: stretch;
  }

  .product-card {
    height: 100%;
  }

  .product-card:hover {
    transform: none;
  }

  .product-card h3 {
    min-height: 2.9em;
  }

  .product-card p {
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .product-media {
    overflow-x: auto;
    overflow-y: hidden;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    touch-action: pan-x;
    overscroll-behavior-x: contain;
    scrollbar-width: none;
  }

  .product-media::-webkit-scrollbar {
    display: none;
  }

  .product-media img + img {
    display: block;
  }

  .product-card img {
    height: 120px;
    min-height: 120px;
    scroll-snap-align: start;
    pointer-events: none;
    user-select: none;
  }

  .modal-media img {
    height: 200px;
    min-height: 200px;
  }

  .steps,
  .why-grid,
  .compare-wrap,
  .contact-cards {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .step,
  .why-card,
  .compare-col,
  .contact-card {
    min-height: 0;
    padding: 12px;
  }

  .step h3,
  .why-card h3,
  .compare-col h3,
  .contact-card h3 {
    font-size: 0.88rem;
  }

  .step p,
  .why-card p,
  .compare-col li,
  .contact-card p,
  .faq details p {
    font-size: 0.78rem;
    line-height: 1.55;
  }

  .why-card {
    border: 1.5px solid rgba(11, 21, 38, 0.22);
    box-shadow: none;
  }

  .contact-card .btn {
    min-height: 40px;
    padding: 8px 10px;
    font-size: 0.8rem;
    width: 100%;
  }

  .faq .container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    align-items: start;
  }

  .faq .section-head {
    grid-column: 1 / -1;
    margin-bottom: 0;
  }

  .faq #faq-list {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .faq details {
    margin-bottom: 0;
    padding: 12px;
  }

  .faq summary {
    font-size: 0.86rem;
    line-height: 1.45;
  }

  .hero {
    padding: 28px 0 40px;
  }

  .brand-logo {
    width: 168px;
  }

  .modal-dialog {
    width: 100%;
    max-height: calc(100vh - 16px);
    border-radius: 18px;
  }

  .float-wa {
    left: 12px;
    bottom: 12px;
  }

  .metric-card {
    max-width: 46%;
  }

  .gauge-value {
    font-size: 2rem;
  }

  .gauge-phase.is-after {
    font-size: 1.45rem;
  }
}

@media (max-width: 360px) {
  .container {
    width: min(calc(100% - 20px), var(--container));
  }

  .hero-actions .btn {
    flex: 1 1 0;
    width: auto;
    min-width: 0;
    font-size: 0.82rem;
    padding-inline: 10px;
  }
}