/* ==========================================================================
   responsive.css — Desktop trước, sau đó thu nhỏ dần
   Breakpoints: 1200 / 1024 / 860 / 640 / 420
   ========================================================================== */

/* ------------------------------------------------- <= 1400px
   Lô-gô rộng cộng menu 6 mục đã chiếm gần hết container 1340px, nên ô tìm kiếm
   phải nhường chỗ trước, nếu không menu sẽ tụt xuống hàng hai và đầu trang cao
   gấp đôi. */
@media (max-width: 1400px) {
  .header__search {
    display: none;
  }
}

/* ------------------------------------------------- <= 1280px : desktop nhỏ */
@media (max-width: 1280px) {
  :root {
    --container-gutter: 28px;
  }
  .nav-list {
    gap: 0 14px;
  }
  .hero__usp {
    gap: 24px;
  }
  .cta-band__inner {
    padding-inline: 40px 0;
  }
}

/* ------------------------------------------------- <= 1200px */
@media (max-width: 1200px) {
  .cat-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--gap-card);
  }
  .cat-card__media {
    max-height: 168px;
  }
  .oem__inner {
    grid-template-columns: 30% minmax(0, 30%) minmax(0, 40%);
  }
  .split {
    gap: 36px;
  }

  /*
   * Menu chuyển sang dạng nút ba gạch ngay từ 1200px. Trước đây mốc này là
   * 1024px, nhưng trong khoảng 1025–1100px menu 6 mục không còn đủ chỗ trên
   * một hàng nên tụt xuống hàng hai, làm đầu trang cao gấp đôi.
   */
  .nav-toggle {
    display: inline-flex;
  }
  .header__inner {
    gap: 12px;
    flex-wrap: nowrap;
  }
  .header__phone b {
    font-size: 15px;
  }
  .header__cta {
    display: none;
  }
  .header__phone {
    margin-inline-start: auto;
  }
  .nav-toggle {
    margin-inline-start: 0;
  }

  .site-navigation {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 99;
    width: min(320px, 86vw);
    padding: 76px 20px 24px;
    background: #fff;
    box-shadow: 0 0 40px rgba(16, 40, 24, 0.18);
    overflow-y: auto;
    transform: translateX(-102%);
    transition: transform var(--t-base);
  }
  body.nav-open .site-navigation {
    transform: translateX(0);
  }
  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .nav-list > li > a {
    padding: 13px 4px;
    border-bottom: 1px solid var(--c-line-soft);
    font-size: 16px;
    justify-content: space-between;
  }
  .nav-list > li.is-current > a::after {
    display: none;
  }
  .sub-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: 0;
    border-bottom: 1px solid var(--c-line-soft);
    border-radius: 0;
    padding: 4px 0 8px 12px;
    display: none;
  }
  .has-sub.is-open > .sub-menu {
    display: block;
  }
}

/* ------------------------------------------------- <= 1024px : tablet ngang */
@media (max-width: 1024px) {
  :root {
    --container-gutter: 24px;
    --section-pad: 20px;
  }

  /* Hero */
  .hero__inner {
    min-height: 0;
    padding-block: 34px 26px;
  }
  .hero__overlay {
    background: linear-gradient(
      90deg,
      rgba(250, 251, 246, 0.97) 0%,
      rgba(250, 251, 246, 0.9) 42%,
      rgba(250, 251, 246, 0.5) 62%,
      rgba(250, 251, 246, 0.12) 78%,
      rgba(250, 251, 246, 0) 92%
    );
  }
  .hero__content {
    max-width: 560px;
  }
  .hero__usp {
    max-width: 560px;
  }
  .usp {
    flex: 1 1 44%;
  }

  /* Các lưới */
  .needs-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .product-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .carousel__track {
    grid-auto-columns: calc((100% - (var(--carousel-gap) * 2)) / 3);
  }
  .split {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
  }
  .news-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  /* OEM: ảnh chuyển thành dải banner phía trên nội dung */
  .oem__media {
    position: static;
    width: 100%;
    height: clamp(150px, 22vw, 210px);
  }
  .oem__media img {
    object-position: center 72%;
    -webkit-mask-image: none;
    mask-image: none;
  }
  .oem__inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding-block: 28px;
  }
  .oem__content {
    padding-inline-end: 0;
  }
  .oem__script {
    align-self: flex-start;
    transform: none;
    text-align: left;
    margin: 0 0 8px;
  }
  .oem__script span:last-child {
    margin-inline-start: 0;
  }
  .steps {
    margin-top: 38px;
    background: rgba(255, 255, 255, 0.86);
  }

  /* CTA */
  .cta-band__inner {
    padding-inline: 0;
    padding-block: 20px;
  }
  .cta-band__leaf {
    width: 96px;
  }
  .cta-band__script {
    display: none;
  }

  /* Trang trong */
  .page-layout,
  .page-layout--reverse {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
  }
  .grid--products,
  .page-layout .grid--products {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .result-item {
    grid-template-columns: 160px minmax(0, 1fr);
  }

  .footer__inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px 0;
  }
  .footer__col {
    padding-inline: 20px;
  }
  .footer__col:nth-child(odd) {
    padding-inline-start: 0;
    border-inline-start: 0;
  }
}

/* ------------------------------------------------- <= 860px : tablet dọc */
@media (max-width: 860px) {
  :root {
    --container-gutter: 20px;
  }
  .cat-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .needs-grid {
    grid-template-columns: minmax(0, 1fr);
  }
  .need-card {
    grid-template-columns: 38% minmax(0, 1fr);
  }
  .news-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .carousel__track {
    grid-auto-columns: calc((100% - var(--carousel-gap)) / 2);
  }
  .capability-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--gap-card);
  }
  .steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    row-gap: 30px;
    padding-top: 30px;
  }
  .step + .step::before {
    display: none;
  }
  .step:nth-child(n + 4) .step__num,
  .step .step__num {
    position: static;
    transform: none;
    box-shadow: none;
    margin-bottom: 2px;
  }
  .steps::before {
    display: none;
  }
}

/* ------------------------------------------------- <= 640px : mobile */
@media (max-width: 640px) {
  :root {
    --container-gutter: 16px;
    --section-pad: 22px;
    --gap-card: 12px;
    --gap-card-tight: 10px;
  }

  .brand img {
    height: 38px;
  }
  .header__phone {
    padding: 6px 10px 6px 6px;
  }
  .header__phone .phone-text {
    display: none;
  }
  .header__phone .phone-ring {
    width: 28px;
    height: 28px;
  }

  /* Hero: nền chuyển sang ảnh bố cục sản phẩm, chữ nằm trên nền sáng */
  .hero__media {
    background-image: var(--hero-bg-mobile, url("../images/hero-main-mobile.webp"));
    background-position: 30% bottom;
  }
  .hero__overlay {
    background: linear-gradient(
      180deg,
      rgba(250, 251, 246, 0.96) 0%,
      rgba(250, 251, 246, 0.92) 52%,
      rgba(250, 251, 246, 0.82) 100%
    );
  }
  .hero__inner {
    padding-block: 26px 24px;
  }
  .hero__actions {
    gap: 10px;
  }
  .hero__actions .btn {
    flex: 1 1 auto;
  }
  .hero__usp {
    gap: 14px 18px;
    margin-top: 22px;
  }
  .usp {
    flex: 1 1 44%;
  }
  .usp__icon {
    width: 34px;
    height: 34px;
    font-size: 16px;
  }

  .section__head {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
  .carousel-nav {
    display: none;
  }
  .carousel__track {
    grid-auto-columns: calc((100% - var(--carousel-gap)) / 2);
  }

  .cat-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .product-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .news-grid {
    grid-template-columns: minmax(0, 1fr);
  }
  .post-card {
    flex-direction: row;
    gap: 10px;
    align-items: center;
  }
  .post-card__media {
    width: 132px;
    flex: none;
    aspect-ratio: 4 / 3;
  }
  .post-card__body {
    padding: 0 6px 0 0;
  }

  .need-card {
    grid-template-columns: minmax(0, 1fr);
  }
  .need-card__media {
    aspect-ratio: 16 / 9;
  }
  .need-card__body {
    padding: 0 6px 8px;
  }

  /* Thẻ hẹp lại thì cụm nút xuống hàng riêng và trải hết chiều ngang. */
  .product-card__foot {
    align-items: stretch;
    gap: 8px;
  }
  .product-card__actions {
    width: 100%;
    margin-inline-start: 0;
  }
  .product-card__actions .btn {
    flex: 1 1 auto;
  }
  .product-card__add {
    flex: 0 0 auto;
  }
  .grid--products,
  .page-layout .grid--products {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  /* Khung thẻ cột nội dung thu gọn đệm trong cho đỡ chật. */
  .page-layout > :first-child {
    padding: 16px;
    border-radius: var(--radius-md);
  }

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

  .oem__media {
    display: none;
  }

  .cta-band__inner {
    gap: 12px;
  }
  .cta-pill,
  .cta-band__btn {
    flex: 1 1 100%;
  }

  .footer__inner {
    grid-template-columns: minmax(0, 1fr);
  }
  .footer__col {
    padding-inline: 0;
    border-inline-start: 0;
    padding-top: 16px;
    border-top: 1px solid var(--c-line-soft);
  }
  .footer__col:first-child {
    padding-top: 0;
    border-top: 0;
  }

  .entry-content {
    font-size: 16px;
  }
  .result-item {
    grid-template-columns: minmax(0, 1fr);
  }
  .toolbar {
    flex-direction: column;
    align-items: stretch;
  }
}

/* ------------------------------------------------- <= 420px */
@media (max-width: 420px) {
  .cat-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .product-grid {
    grid-template-columns: minmax(0, 1fr);
  }
  .carousel__track {
    grid-auto-columns: 78%;
  }
  .capability-grid {
    grid-template-columns: minmax(0, 1fr);
  }
  .steps {
    grid-template-columns: minmax(0, 1fr);
    row-gap: 22px;
  }
  .hero__actions .btn {
    width: 100%;
  }
  .grid--products,
  .page-layout .grid--products {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* ------------------------------------------------- Màn hình rất rộng */
@media (min-width: 1700px) {
  .hero__inner {
    min-height: 560px;
  }
}

/* ------------------------------------------------- In ấn */
@media print {
  .site-header,
  .cta-band,
  .nav-backdrop {
    display: none !important;
  }
}