/* =========================================================
   DIAMOND EDU — V28.7.42 MOBILE FINAL
   File mobile độc lập.
   Không thay đổi giao diện desktop.
   ========================================================= */

@media screen and (max-width: 767px) {

  /* =======================================================
     01. NỀN TẢNG MOBILE
     ======================================================= */

  html,
  body {
    width: 100% !important;
    max-width: 100% !important;
    overflow-x: hidden !important;
  }

  body {
    font-size: 15px !important;
  }

  body .shell {
    width: 100% !important;
    max-width: 100% !important;
    padding-left: 18px !important;
    padding-right: 18px !important;
  }

  body main section {
    max-width: 100% !important;
  }

  /* =======================================================
     02. HERO
     ======================================================= */

  body .v28-hero {
    min-height: 0 !important;
    padding-top: 30px !important;
    padding-bottom: 32px !important;
  }

  body .v28-hero-grid {
    display: block !important;
    min-height: 0 !important;
  }

  body .v28-hero-copy {
    width: 100% !important;
    max-width: 100% !important;
    padding: 0 !important;
  }

  body .v28-eyebrow {
    display: flex !important;
    flex-wrap: wrap !important;
    align-items: center !important;
    gap: 7px !important;
    margin: 0 0 14px !important;
    font-size: 12px !important;
    line-height: 1.3 !important;
  }

  body .v28-eyebrow span {
    padding: 7px 11px !important;
    font-size: 11px !important;
    line-height: 1 !important;
  }

  body .v28-hero-copy h1 {
    max-width: 100% !important;
    margin: 0 !important;
    font-size: 33px !important;
    line-height: 1.04 !important;
    letter-spacing: -1.15px !important;
    font-weight: 850 !important;
  }

  /* =======================================================
     03. 4 NHÓM NHU CẦU — 2 x 2
     ======================================================= */

  body .v28-audience-grid {
    display: grid !important;
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 10px !important;
    margin-top: 24px !important;
  }

  body .v28-audience-grid > article {
    min-width: 0 !important;
    min-height: 0 !important;
    height: auto !important;
    padding: 15px 14px !important;
    border-radius: 16px !important;
  }

  body .v28-audience-grid > article > span {
    display: block !important;
    margin: 0 0 9px !important;
    font-size: 20px !important;
    line-height: 1 !important;
  }

  body .v28-audience-grid h3 {
    margin: 0 0 6px !important;
    font-size: 15.5px !important;
    line-height: 1.22 !important;
    letter-spacing: -0.15px !important;
  }

  body .v28-audience-grid p {
    margin: 0 !important;
    font-size: 13px !important;
    line-height: 1.43 !important;
  }

  /* =======================================================
     04. HEADING CHUNG
     ======================================================= */

  body .v27-section-head,
  body .v28-center-head {
    margin-bottom: 20px !important;
  }

  body .v27-section-head span,
  body .v28-center-head span {
    font-size: 10.5px !important;
    line-height: 1.2 !important;
    letter-spacing: .14em !important;
  }

  body .v27-section-head h2,
  body .v28-center-head h2 {
    margin: 8px 0 9px !important;
    font-size: 27px !important;
    line-height: 1.1 !important;
    letter-spacing: -.65px !important;
  }

  body .v27-section-head p,
  body .v28-center-head p {
    margin-top: 0 !important;
    font-size: 14.5px !important;
    line-height: 1.52 !important;
  }

  body .v27-text-link {
    font-size: 14.5px !important;
  }

  /* =======================================================
     05. APTIS / VSTEP
     ======================================================= */

  body .v28-programs {
    padding-top: 36px !important;
    padding-bottom: 36px !important;
  }

  body .v28-programs-grid {
    display: grid !important;
    grid-template-columns: 1fr !important;
    gap: 12px !important;
  }

  body .v28-program-card {
    min-height: 0 !important;
    height: auto !important;
    padding: 19px 18px !important;
    border-radius: 18px !important;
  }

  body .v28-program-label {
    margin-bottom: 10px !important;
    font-size: 10.5px !important;
    letter-spacing: .13em !important;
  }

  body .v28-program-card h3 {
    margin: 0 0 10px !important;
    font-size: 22px !important;
    line-height: 1.15 !important;
  }

  body .v28-program-card > div > p,
  body .v28-program-card > p {
    margin: 0 0 13px !important;
    font-size: 14px !important;
    line-height: 1.5 !important;
  }

  body .v28-checklist {
    display: grid !important;
    gap: 6px !important;
    margin: 0 0 13px !important;
  }

  body .v28-checklist span {
    font-size: 13.5px !important;
    line-height: 1.4 !important;
  }

  body .v28-program-card > a {
    font-size: 14px !important;
  }

  /* =======================================================
     06. FEEDBACK
     ======================================================= */

  body .v27-feedback-section {
    padding-top: 36px !important;
    padding-bottom: 36px !important;
  }

  body .v27-feedback-section .v27-section-head h2 {
    max-width: 315px !important;
    font-size: 27px !important;
    line-height: 1.08 !important;
  }

  body .v28726-feedback-carousel {
    width: 100% !important;
    overflow-x: auto !important;
    overflow-y: hidden !important;
    scroll-snap-type: x mandatory !important;
    -webkit-overflow-scrolling: touch !important;
    padding-right: 14px !important;
    padding-bottom: 4px !important;
  }

  body .v28726-feedback-track {
    display: flex !important;
    gap: 10px !important;
    width: max-content !important;
  }

  body .v28726-feedback-card {
    flex: 0 0 calc(100vw - 56px) !important;
    width: calc(100vw - 56px) !important;
    max-width: 340px !important;
    min-height: 0 !important;
    scroll-snap-align: start !important;
    border-radius: 17px !important;
  }

  body .v27-feedback-copy {
    padding: 15px !important;
  }

  /* =======================================================
     07. ĐỘI NGŨ GIẢNG VIÊN
     JS bên dưới sẽ gắn 2 class mobile riêng
     ======================================================= */

  body .mobile-teacher-section {
    padding-top: 34px !important;
    padding-bottom: 34px !important;
  }

  body .mobile-teacher-placeholder {
    display: none !important;
  }

  /* =======================================================
     08. KHÓA HỌC NỔI BẬT
     ======================================================= */

  body .v27-courses-section {
    padding-top: 36px !important;
    padding-bottom: 36px !important;
  }

  body .v28721-course-carousel {
    width: 100% !important;
    overflow-x: auto !important;
    overflow-y: hidden !important;
    scroll-snap-type: x mandatory !important;
    -webkit-overflow-scrolling: touch !important;
    padding-right: 14px !important;
    padding-bottom: 4px !important;
  }

  body .v28721-course-track {
    display: flex !important;
    gap: 10px !important;
    width: max-content !important;
  }

  body .v28721-course-card {
    flex: 0 0 calc(100vw - 56px) !important;
    width: calc(100vw - 56px) !important;
    max-width: 340px !important;
    min-height: 0 !important;
    height: auto !important;
    padding: 18px !important;
    border-radius: 17px !important;
    scroll-snap-align: start !important;
  }

  body .v28721-course-top {
    margin-bottom: 9px !important;
  }

  body .v28721-course-card h3 {
    margin: 0 0 9px !important;
    font-size: 20px !important;
    line-height: 1.2 !important;
  }

  body .v28721-course-card > p {
    margin: 0 0 13px !important;
    font-size: 13.5px !important;
    line-height: 1.5 !important;
  }

  body .v27-price-row {
    margin: 10px 0 !important;
  }

  body .v27-price-row strong {
    font-size: 26px !important;
    line-height: 1.05 !important;
  }

  body .v27-course-link,
  body .v28712-register-cta {
    min-height: 42px !important;
    padding: 9px 12px !important;
    font-size: 13.5px !important;
  }

  /* =======================================================
     09. QUY TRÌNH 4 BƯỚC — 2 x 2
     ======================================================= */

  body .v27-process {
    padding-top: 36px !important;
    padding-bottom: 36px !important;
  }

  body .v27-process-grid {
    display: grid !important;
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 10px !important;
  }

  body .v27-process-grid > div {
    min-width: 0 !important;
    min-height: 158px !important;
    height: auto !important;
    padding: 15px 13px !important;
    border-radius: 16px !important;
  }

  body .v27-process-grid > div > span {
    width: 36px !important;
    min-width: 36px !important;
    height: 36px !important;
    min-height: 36px !important;
    margin-bottom: 11px !important;
  }

  body .v27-process-grid h3 {
    margin: 0 0 6px !important;
    font-size: 15.5px !important;
    line-height: 1.22 !important;
  }

  body .v27-process-grid p {
    margin: 0 !important;
    font-size: 12.8px !important;
    line-height: 1.42 !important;
  }

  /* =======================================================
     10. FAQ
     ======================================================= */

  body .v28-faq {
    padding-top: 36px !important;
    padding-bottom: 36px !important;
  }

  body .v28-faq-grid {
    grid-template-columns: 1fr !important;
    gap: 14px !important;
  }

  body .v28-faq-list {
    display: grid !important;
    gap: 7px !important;
  }

  body .v28-faq-list details {
    border-radius: 14px !important;
  }

  body .v28-faq-list summary {
    padding: 13px 14px !important;
    font-size: 14.5px !important;
    line-height: 1.35 !important;
  }

  body .v28-faq-list details p {
    margin: 0 !important;
    padding: 0 14px 14px !important;
    font-size: 13px !important;
    line-height: 1.52 !important;
  }

  /* =======================================================
     11. CTA CUỐI
     ======================================================= */

  body .v27-final-cta {
    padding-top: 36px !important;
    padding-bottom: 36px !important;
  }

  body .v27-final-cta > div {
    padding: 22px 18px !important;
    border-radius: 18px !important;
  }

  body .v27-final-cta h2 {
    margin: 9px 0 !important;
    font-size: 27px !important;
    line-height: 1.12 !important;
  }

  body .v27-final-cta p {
    margin: 0 0 14px !important;
    font-size: 14px !important;
    line-height: 1.5 !important;
  }

  body .v27-final-cta .v27-btn {
    min-height: 42px !important;
    padding: 9px 14px !important;
    font-size: 14px !important;
  }
}

/* iPhone nhỏ */
@media screen and (max-width: 390px) {

  body .shell {
    padding-left: 15px !important;
    padding-right: 15px !important;
  }

  body .v28-hero-copy h1 {
    font-size: 31px !important;
  }

  body .v27-section-head h2,
  body .v28-center-head h2,
  body .v27-feedback-section .v27-section-head h2,
  body .v27-final-cta h2 {
    font-size: 25px !important;
  }

  body .v28-audience-grid,
  body .v27-process-grid {
    gap: 8px !important;
  }

  body .v28-audience-grid > article {
    padding: 14px 12px !important;
  }

  body .v27-process-grid > div {
    padding: 14px 11px !important;
  }
}