:root {
      --smri-indigo:      #1e1b4b;
      --smri-violet:      #3730a3;
      --smri-purple-mid:  #6d6acd;
      --smri-purple-light:#a5b4fc;
      --smri-bg-light:    #eef0fb;
      --smri-dark:        #0d0d1a;
      --smri-dark-2:      #13131f;
      --smri-orange:      #f97316;
      --smri-white:       #ffffff;
      --smri-grey:        #9ca3af;
      --smri-card-h:      520px;
      --smri-card-radius: 20px;
      --smri-transition:  0.55s cubic-bezier(0.4, 0, 0.2, 1);
    }

    html { scroll-behavior: smooth; }


    /* ===================== SECTION 1 – STACKING CARDS ===================== */
    .smri-stack-section {
      background: var(--smri-bg-light);
      padding: 80px 0 120px;
      position: relative;
    }

    .smri-stack-heading {
      text-align: center;
      margin-bottom: 56px;
    }
    .smri-stack-heading h2 {
      font-size: clamp(1.8rem, 4vw, 3rem);
      font-weight: 800;
      color: var(--smri-indigo);
      letter-spacing: -0.5px;
    }
    .smri-stack-heading p {
      color: #6b7280;
      font-size: 1.05rem;
      margin-top: 10px;
      max-width: 520px;
      margin-inline: auto;
    }

    /* Sticky container that pins for scroll-driven animation */
    .smri-cards-sticky-wrap {
      position: sticky;
      top: 80px;
      height: var(--smri-card-h);
      z-index: 1;
    }

    /* Invisible scroll spacer — drives the animation */
    .smri-scroll-driver {
      height: calc(var(--smri-card-h) * 4 + 40px);
      position: relative;
    }

    /* Individual card */
    .smri-mri-card {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: var(--smri-card-h);
      border-radius: var(--smri-card-radius);
      background: var(--smri-white);
      box-shadow: 0 8px 40px rgba(55, 48, 163, 0.12);
      display: flex;
      align-items: stretch;
      overflow: hidden;
      transition: transform var(--smri-transition), opacity var(--smri-transition);
      will-change: transform, opacity;
      /* collapsed: nudged right + hidden behind active */
      transform: translateX(calc(var(--smri-card-index, 0) * 40px + 100%)) scale(0.96);
      opacity: 0;
      pointer-events: none;
    }

    /* First card — always active */
    .smri-mri-card:first-child {
      transform: translateX(0) scale(1);
      opacity: 1;
      pointer-events: auto;
    }

    /* Active state applied via JS */
    .smri-mri-card.smri-card--active {
      transform: translateX(0) scale(1);
      opacity: 1;
      pointer-events: auto;
    }

    /* Tab strip on the right edge for collapsed cards */
    .smri-mri-card:not(.smri-card--active):not(:first-child) {
      transform: none;
      opacity: 1;
      right: 0;
      left: auto;
      width: 52px;
      border-radius: 0 var(--smri-card-radius) var(--smri-card-radius) 0;
      cursor: pointer;
      pointer-events: auto;
      z-index: calc(10 + var(--smri-card-index, 0));
    }

    /* ---- Left image pane ---- */
    .smri-card-image-pane {
      flex: 0 0 45%;
      max-width: 45%;
      background: #101420;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 28px;
      position: relative;
      overflow: hidden;
    }
    .smri-card-image-pane::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(55,48,163,0.3) 0%, transparent 60%);
    }
    .smri-card-image-pane img {
      width: 100%;
      max-width: 280px;
      height: auto;
      border-radius: 12px;
      object-fit: cover;
      position: relative;
      z-index: 1;
      /*filter: brightness(1.1) contrast(1.05);*/
    }

    /* Card number badge */
    .smri-card-num {
      position: absolute;
      top: 22px;
      left: 22px;
      z-index: 2;
      font-size: 0.7rem;
      font-weight: 700;
      letter-spacing: 2px;
      text-transform: uppercase;
      color: var(--smri-purple-light);
      writing-mode: vertical-rl;
      transform: rotate(180deg);
    }

    /* ---- Right text pane ---- */
    .smri-card-text-pane {
      flex: 1;
      padding: 44px 40px;
      display: flex;
      flex-direction: column;
      justify-content: center;
      gap: 18px;
    }
    .smri-card-tag {
      display: inline-block;
      font-size: 0.7rem;
      font-weight: 700;
      letter-spacing: 2px;
      text-transform: uppercase;
      color: var(--smri-violet);
      background: rgba(109,106,205,0.12);
      padding: 5px 12px;
      border-radius: 30px;
      width: fit-content;
    }
    .smri-card-text-pane h3 {
      font-size: clamp(1.3rem, 2.5vw, 1.9rem);
      font-weight: 700;
      color: var(--smri-indigo);
      line-height: 1.2;
    }
    .smri-card-text-pane p {
      font-size: 0.95rem;
      line-height: 1.75;
      color: #4b5563;
      max-width: 480px;
    }
    .smri-card-meta {
      display: flex;
      gap: 24px;
      flex-wrap: wrap;
    }
    .smri-card-meta span {
      font-size: 0.8rem;
      font-weight: 600;
      color: var(--smri-violet);
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .smri-card-meta span::before {
      content: '';
      display: inline-block;
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--smri-orange);
    }

    /* Tab label for collapsed cards */
    .smri-card-tab-label {
      display: none;
      writing-mode: vertical-rl;
      transform: rotate(180deg);
      font-size: 0.68rem;
      font-weight: 700;
      letter-spacing: 2px;
      text-transform: uppercase;
      color: var(--smri-indigo);
      white-space: nowrap;
      align-items: center;
      justify-content: center;
      height: 100%;
      width: 100%;
      padding: 20px 0;
    }

    /* ===================== TABLET / MOBILE CARD REWORK ===================== */
    @media (max-width: 991px) {
      :root { --smri-card-h: auto; }

      .smri-cards-sticky-wrap { position: static; height: auto; }
      .smri-scroll-driver     { height: auto; }

      .smri-mri-card {
        position: relative !important;
        transform: none !important;
        opacity: 1 !important;
        width: 100% !important;
        height: auto !important;
        margin-bottom: 24px;
        pointer-events: auto !important;
        flex-direction: column;
        right: auto !important;
        left: auto !important;
        border-radius: var(--smri-card-radius);
      }
      .smri-card-image-pane {
        flex: none;
        max-width: 100%;
        width: 100%;
        height: 220px;
        padding: 20px;
      }
      .smri-card-image-pane img { max-width: 180px; }
      .smri-card-text-pane { padding: 28px 24px; }
      .smri-card-tab-label { display: none !important; }
    }

    /* ===================== SECTION 2 – SYNTHETIC MRI DETAILS ===================== */
    .smri-details-section {
      min-height: 60vh;
      background: linear-gradient(to right, #0a0a0a 50%, #592c11f0);
      position: relative;
      display: flex;
      align-items: center;
      overflow: hidden;
    }

    /* Subtle radial glow */
    .smri-details-section::before {
      content: '';
      position: absolute;
      width: 600px;
      height: 600px;
      right: -80px;
      top: 50%;
      transform: translateY(-50%);
      background: radial-gradient(circle, rgba(109,106,205,0.18) 0%, transparent 70%);
      pointer-events: none;
    }

    .smri-details-inner { position: relative; z-index: 1; width: 100%; padding: 80px 0; }

    /* Left text column */
    .smri-details-text h2 {
      font-size: clamp(1.8rem, 4vw, 2.3rem);
      font-weight: 800;
      line-height: 1.15;
      color: var(--smri-white);
    }
    .smri-details-text h2 em {
      font-style: normal;
      color: var(--smri-purple-light);
      text-decoration: underline;
      text-decoration-color: var(--smri-orange);
      text-underline-offset: 5px;
    }
    .smri-details-text p {
      color: #9ca3af;
      font-size: 1rem;
      line-height: 1.8;
      margin-top: 18px;
      max-width: 500px;
    }

    /* Stats row */
    .smri-stats-row {
      display: flex;
      gap: 36px;
      flex-wrap: wrap;
      margin-top: 36px;
    }
    .smri-stat {
      display: flex;
      flex-direction: column;
      gap: 4px;
    }
    .smri-stat-val {
      font-size: 2rem;
      font-weight: 800;
      color: var(--smri-purple-light);
    }
    .smri-stat-label {
      font-size: 0.75rem;
      color: var(--smri-grey);
      text-transform: uppercase;
      letter-spacing: 1.5px;
      font-weight: 600;
    }

    /* Partner badges */
    .smri-partners-row {
      display: flex;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-top: 36px;
    }
    .smri-partners-label {
      font-size: 0.72rem;
      font-weight: 700;
      letter-spacing: 2px;
      text-transform: uppercase;
      color: var(--smri-grey);
    }
    .smri-partner-badge {
      background: rgba(255,255,255,0.07);
      border: 1px solid rgba(165,180,252,0.2);
      border-radius: 8px;
      padding: 8px 18px;
      font-size: 0.82rem;
      font-weight: 700;
      color: var(--smri-purple-light);
      letter-spacing: 0.5px;
      transition: background 0.3s, border-color 0.3s;
    }
    .smri-partner-badge:hover {
      background: rgba(109,106,205,0.22);
      border-color: var(--smri-purple-mid);
    }

    /* Feature pills */
    .smri-features-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
      margin-top: 36px;
    }
    .smri-feature-pill {
      display: flex;
      align-items: flex-start;
      gap: 14px;
      background: rgba(255,255,255,0.04);
      border: 1px solid rgba(165,180,252,0.1);
      border-radius: 12px;
      padding: 16px 20px;
      transition: border-color 0.3s, background 0.3s;
    }
    .smri-feature-pill:hover {
      border-color: rgba(109,106,205,0.5);
      background: rgba(109,106,205,0.1);
    }
    .smri-feature-icon {
      width: 38px;
      height: 38px;
      border-radius: 8px;
      background: linear-gradient(135deg, var(--smri-violet), var(--smri-purple-mid));
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }
    .smri-feature-icon svg { width: 18px; height: 18px; fill: none; stroke: #fff; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
    .smri-feature-pill-text h4 { font-size: 0.9rem; font-weight: 700; color: var(--smri-white); }
    .smri-feature-pill-text p  { font-size: 0.8rem; color: var(--smri-grey); margin-top: 3px; line-height: 1.5; }

    /* CTA button */
    .smri-cta-btn {
      display: inline-block;
      margin-top: 36px;
      padding: 14px 36px;
      border: 2px solid rgba(165,180,252,0.6);
      border-radius: 50px;
      color: var(--smri-white);
      font-weight: 700;
      font-size: 0.9rem;
      letter-spacing: 0.5px;
      text-decoration: none;
      transition: background 0.35s, border-color 0.35s, color 0.35s;
      background: transparent;
    }
    .smri-cta-btn:hover {
      background: var(--smri-purple-mid);
      border-color: var(--smri-purple-mid);
      color: var(--smri-white);
    }

    /* Right image column */
    .smri-details-img-col {
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .smri-details-img-wrap {
      position: relative;
      width: 100%;
      max-width: 420px;
    }
    .smri-details-img-wrap img {
      width: 100%;
      border-radius: 20px;
      filter: drop-shadow(0 0 60px rgba(109,106,205,0.4));
    }
    .smri-img-glow {
      position: absolute;
      inset: -20px;
      border-radius: 24px;
      background: radial-gradient(circle at center, rgba(109,106,205,0.25) 0%, transparent 70%);
      z-index: -1;
    }

    @media (max-width: 767px) {
      .smri-details-img-col { margin-top: 40px; }
      .smri-details-inner { padding: 60px 0; }
    }