/* ── SHARED SECTION STYLES ────────────────────── */
    .cs-section {
      padding: 72px 120px;
    }

    .cs-two-col {
      display: flex;
      gap: 48px;
      align-items: center;
    }
    .cs-two-col.cs-align-start {
      align-items: flex-start;
    }

    .cs-text-col {
      flex: 1 1 0;
      min-width: 0;
      padding-bottom: 24px;
    }

    .cs-image-col {
      flex: 0 0 auto;
      display: flex;
      flex-direction: column;
      align-items: flex-end;
      gap: 8px;
    }

    .cs-section-label {
      font-family: 'Outfit', sans-serif;
      font-weight: 700;
      font-size: 32px;
      line-height: 40px;
      margin-bottom: 12px;
    }

    .cs-body {
      font-family: 'Inter', sans-serif;
      font-weight: 400;
      font-size: 18px;
      line-height: 24px;
    }

    /* ── IMAGE CONTAINERS ─────────────────────────── */
    .cs-img-wrap {
      border-radius: 24px;
      overflow: hidden;
      display: block;
      cursor: pointer;
      position: relative;
      transition: opacity 150ms ease;
    }
    .cs-img-wrap:hover { opacity: 0.9; }

    /* Aspect variants */
    .cs-img-wrap.square, .cs-video-wrap.square { width: 400px; height: 400px; }
    .cs-img-wrap.widescreen { width: 400px; height: 225px; }
    .cs-img-wrap.tall { width: 400px; height: 540px; }

    /* ── INLINE VIDEO PLAYER ────────────────────────────── */
    .cs-video-wrap {
      border-radius: 24px;
      overflow: hidden;
      display: block;
      cursor: pointer;
      position: relative;
      background: var(--blackberry);
    }
    .cs-video-wrap.widescreen { width: 400px; height: 225px; }
    .cs-video-wrap video {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }
    .cs-video-icon {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      width: 48px;
      height: 48px;
      pointer-events: none;
      display: flex;
      align-items: center;
      justify-content: center;
      opacity: 0;
    }
    .cs-video-icon img {
      width: 100%;
      height: 100%;
      opacity: 0.5;
    }
    .cs-icon-play {
      transition: opacity 150ms ease;
    }
    .cs-icon-pause {
      transition: opacity 1500ms ease;
    }
    .cs-video-wrap.is-paused .cs-icon-play {
      opacity: 1;
    }
    .cs-video-wrap.show-pause .cs-icon-pause {
      opacity: 1;
      transition: opacity 0ms;
    }

    .cs-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }

    /* Placeholder (will be replaced by real images) */
    .cs-img-placeholder {
      width: 100%; height: 100%;
      border-radius: 24px;
      border: 1px solid var(--blackberry);
      background: var(--rad-blue);
    }

    .cs-caption {
      font-family: 'Inter', sans-serif;
      font-weight: 600;
      font-size: 12px;
      line-height: 15px;
      color: var(--blackberry);
      text-align: right;
      padding: 0 12px;
    }
    .cs-caption.light { color: var(--gypsum); }

    /* ── INTRO BLOCK ──────────────────────────────── */
    .cs-intro {
      background: var(--navy);
      padding: 120px 120px 48px;
      display: flex;
      flex-direction: column;
      gap: 48px;
    }

    .cs-intro-headline {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .cs-intro-eyebrow-wrap {
      display: flex;
      flex-direction: column;
      gap: 16px;
      padding: 24px 0;
    }

    .cs-eyebrow {
      font-family: 'Inter', sans-serif;
      font-weight: 600;
      font-size: 16px;
      line-height: 19px;
      letter-spacing: 4px;
      text-transform: uppercase;
      color: var(--gypsum);
    }

    .cs-title {
      font-family: 'Outfit', sans-serif;
      font-weight: 700;
      font-size: 64px;
      line-height: 81px;
      color: var(--gypsum);
    }

    .cs-accent-rule {
      width: 88px;
      height: 8px;
      background: var(--neon-pink);
      border-radius: 0;
    }

    /* Subject tag row */
    .cs-tag-row {
      display: flex;
      flex-wrap: wrap;
      gap: 4px;
    }

    .cs-tag {
      font-family: 'Inter', sans-serif;
      font-weight: 600;
      font-size: 12px;
      line-height: 15px;
      padding: 4px 8px;
      border-radius: 24px;
      white-space: nowrap;
    }
    .cs-tag.light { color: var(--navy); }
    .cs-tag.dark  { color: var(--gypsum); }

    /* Intro text+image row */
    .cs-intro-body {
      color: var(--gypsum);
    }

    /* ── THE CHALLENGE ────────────────────────────── */
    .cs-challenge {
      background: var(--dusty);
      color: var(--navy);
    }

    /* ── ROLE ─────────────────────────────────────── */
    .cs-role {
      background: var(--aqua);
      color: var(--navy);
    }

    /* ── DESIGN PROCESS ───────────────────────────── */
    .cs-design-process {
      background: var(--navy);
      color: var(--gypsum);
      padding-bottom: 24px;
    }
    .cs-design-process .cs-caption { color: var(--gypsum); }

    /* ── CAROUSEL STRIP ───────────────────────────── */
    .cs-carousel-section {
      background: var(--navy);
      padding: 0 120px 48px;
    }

    .cs-carousel-wrap {
      display: flex;
      align-items: center;
      gap: 24px;
    }

    .cs-carousel-track-outer {
      flex: 1 1 0;
      min-width: 0;
      overflow: hidden;
      position: relative;
      padding: 12px 0;
      margin: -12px 0;
    }

    .cs-carousel-track {
      display: flex;
      gap: 16px;
      transition: transform 350ms cubic-bezier(0.4, 0, 0.2, 1);
    }

    .cs-carousel-thumb {
      flex: 0 0 160px;
      width: 160px;
      height: 160px;
      border-radius: 24px;
      overflow: hidden;
      cursor: pointer;
      transition: opacity 150ms ease, transform 150ms ease, border-radius 200ms cubic-bezier(0.4, 0, 0.2, 1);
      border: 2px solid transparent;
    }
    .cs-carousel-thumb:hover {
      opacity: 0.85;
      transform: scale(1.03);
      border-radius: 0;
    }
    .cs-carousel-thumb img,
    .cs-carousel-thumb video {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }

    /* Arrow button */
    .cs-arrow-btn {
      flex: 0 0 64px;
      width: 64px;
      height: 32px;
      border: 1px solid var(--gypsum);
      border-radius: 24px;
      background: transparent;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: background 150ms ease, border-color 150ms ease;
    }
    .cs-arrow-btn:hover  { background: var(--aqua); border-color: var(--aqua); }
    .cs-arrow-btn:active { background: var(--banana); border-color: var(--banana); }
    .cs-arrow-btn svg { pointer-events: none; }

    /* ── EFFECTS & RESULTS ────────────────────────── */
    .cs-effects {
      background: var(--snowball);
      color: var(--navy);
    }
    .cs-effects .cs-body { color: var(--blackberry); }

    /* ── CONCLUSION ───────────────────────────────── */
    .cs-conclusion {
      background: var(--eggplant);
      color: var(--gypsum);
    }
    
    /* ── COMPACT VARIANT OVERRIDES ────────────────── */
    body.cs-compact .cs-intro {
      background: var(--gypsum);
      padding-bottom: 72px;
    }
    body.cs-compact .cs-title,
    body.cs-compact .cs-eyebrow,
    body.cs-compact .cs-intro-body,
    body.cs-compact .cs-intro .cs-section-label {
      color: var(--blackberry) !important;
    }
    body.cs-compact .cs-challenge-role {
      background: var(--eggplant);
      color: var(--gypsum);
    }
    body.cs-compact .cs-challenge-role .cs-section-label {
      color: var(--gypsum);
    }
    body.cs-compact .cs-effects-conclusion {
      background: transparent;
      color: var(--blackberry);
    }

    /* ── FOOTER ───────────────────────────────────── */
    .cs-footer {
      background: var(--grape);
      padding: 24px 16px;
      text-align: center;
      width: 100%;
      position: relative;
    }
    .cs-footer p {
      font-family: 'Inter', sans-serif;
      font-weight: 400;
      font-size: 12px;
      line-height: 15px;
      color: var(--dusty);
    }
    .cs-footer span { color: var(--neon-pink); }

    /* Secret Button */
    .secret-button {
      position: absolute;
      right: 24px;
      top: 50%;
      transform: translateY(-50%);
      font-family: 'Outfit', sans-serif;
      font-weight: 700;
      font-size: 16px;
      color: rgba(250, 250, 250, 0.15); /* Very faint over grape */
      background: transparent;
      padding: 8px 24px;
      border-radius: 32px;
      border: none;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      transition: all 0.2s ease;
      z-index: 10;
      text-decoration: none;
    }

    .secret-button::after {
      content: "Utilities";
    }

    .secret-button:hover {
      color: #007A78;
      background: transparent;
    }

    .secret-button:active {
      color: var(--grape);
      background: var(--grape);
    }

    /* ── LIGHTBOX MODAL ───────────────────────────── */
    .lightbox-overlay {
      position: fixed;
      inset: 0;
      background: rgba(38,15,37,0.20);
      backdrop-filter: blur(6px);
      -webkit-backdrop-filter: blur(6px);
      z-index: 200;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 24px;
      opacity: 0;
      pointer-events: none;
      transition: opacity 250ms ease;
    }
    .lightbox-overlay.open {
      opacity: 1;
      pointer-events: all;
    }

    .lightbox-inner {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 16px;
      max-width: 90vw;
      max-height: 90vh;
      transform: translateY(12px) scale(0.97);
      transition: transform 280ms cubic-bezier(0.34,1.4,0.64,1), opacity 250ms ease;
      opacity: 0;
    }
    .lightbox-overlay.open .lightbox-inner {
      transform: translateY(0) scale(1);
      opacity: 1;
    }

    .lightbox-img-wrap {
      border-radius: 24px;
      overflow: hidden;
      max-height: 80vh;
    }
    .lightbox-img-wrap img,
    .lightbox-img-wrap video {
      display: block;
      max-width: 90vw;
      max-height: 80vh;
      object-fit: contain;
      border-radius: 24px;
    }

    .lightbox-video-wrap {
      position: relative;
      display: none;
      cursor: pointer;
    }
    
    .lightbox-video-icon {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      width: 56px;
      height: 56px;
      pointer-events: none;
      display: flex;
      align-items: center;
      justify-content: center;
      opacity: 0;
    }
    .lightbox-video-icon img {
      width: 100%;
      height: 100%;
      opacity: 0.5;
    }
    .lightbox-video-wrap .cs-icon-play {
      transition: opacity 150ms ease;
    }
    .lightbox-video-wrap .cs-icon-pause {
      transition: opacity 1500ms ease;
    }
    .lightbox-video-wrap.is-paused .cs-icon-play {
      opacity: 1;
    }
    .lightbox-video-wrap.show-pause .cs-icon-pause {
      opacity: 1;
      transition: opacity 0ms;
    }

    .lightbox-caption {
      background: var(--dusty);
      color: var(--navy);
      border: 2px solid var(--navy);
      font-family: 'Inter', sans-serif;
      font-weight: 600;
      font-size: 14px;
      line-height: 18px;
      padding: 8px 24px;
      border-radius: 32px;
      text-align: center;
      display: inline-block;
      margin-top: 0;
      box-sizing: border-box;
      max-width: calc(100vw - 152px);
    }

    .lightbox-bottom-bar {
      display: flex;
      justify-content: center;
      align-items: flex-start;
      width: 100%;
      position: relative;
      margin-top: 16px;
    }

    .lightbox-content {
      position: relative;
      display: flex;
      flex-direction: column;
      align-items: center;
    }

    .lightbox-close {
      position: absolute;
      top: -12px;
      right: 0;
      transform: translateY(-100%);
      width: 44px;
      height: 44px;
      border: none;
      border-radius: 24px;
      background: var(--eggplant);
      color: var(--gypsum);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: background 150ms ease, color 150ms ease;
      z-index: 202;
    }
    .lightbox-close:hover { background: var(--aqua); color: var(--blackberry); }
    .lightbox-close:active { background: var(--banana); color: var(--blackberry); }

    .lightbox-arrow-btn {
      position: absolute;
      top: 0;
      width: 64px;
      height: 32px;
      border: none;
      border-radius: 24px;
      background: var(--eggplant);
      color: var(--gypsum);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: background 150ms ease, color 150ms ease;
      z-index: 202;
    }
    .lb-prev-btn {
      left: 0;
    }
    .lb-next-btn {
      right: 0;
    }
    .lightbox-arrow-btn:hover {
      background: var(--aqua);
      color: var(--blackberry);
    }
    .lightbox-arrow-btn:active {
      background: var(--banana);
      color: var(--blackberry);
    }
    .lightbox-arrow-btn svg { pointer-events: none; }

    .lightbox-overlay.open .lightbox-inner {
      transform: translateY(0) scale(1);
      opacity: 1;
      margin-bottom: 0;
    }

    .lightbox-img-wrap {
      border-radius: 24px;
      overflow: hidden;
      max-height: 75vh;
      box-sizing: border-box;
    }
    .lightbox-img-wrap img,
    .lightbox-img-wrap video {
      display: block;
      max-width: 90vw;
      max-height: 75vh;
      object-fit: contain;
      border-radius: 20px;
    }

    /* ══════════════════════════════════════════════════
       TABLET  ≤1100px
    ══════════════════════════════════════════════════ */
    @media (max-width: 1100px) {
      .cs-intro      { padding: 104px 48px 64px; gap: 40px; }
      .cs-section    { padding: 64px 48px; }
      .cs-carousel-section { padding: 0 48px 48px; }

      .cs-title { font-size: 48px; line-height: 60px; }

      .cs-img-wrap.square, .cs-video-wrap.square { width: 260px; height: 260px; }
      .cs-img-wrap.widescreen { width: 260px; height: 146px; }
      .cs-video-wrap.widescreen { width: 260px; height: 146px; }
      .cs-img-wrap.tall { width: 260px; height: 350px; }

    }

    /* ══════════════════════════════════════════════════
       MOBILE  ≤699px
    ══════════════════════════════════════════════════ */
    @media (max-width: 699px) {
      .nav-pill   { display: none; }
      .nav-mobile { display: block; }

      .cs-intro   { padding: 88px 24px 48px; gap: 32px; }
      .cs-section { padding: 48px 24px; }
      .cs-carousel-section { padding: 0 24px 40px; }

      .cs-title { font-size: 36px; line-height: 44px; }

      /* Stack two-col layout */
      .cs-two-col {
        flex-direction: column;
        align-items: center;
        gap: 32px;
      }
      
      .cs-text-col { width: 100%; }

      /* Images go below text on mobile */
      .cs-image-col {
        width: 100%;
        align-items: center;
      }

      .cs-img-wrap.square, .cs-video-wrap.square { width: 100%; height: auto; aspect-ratio: 1 / 1; }
      .cs-img-wrap.widescreen { width: 100%; height: auto; aspect-ratio: 16 / 9; }
      .cs-video-wrap.widescreen { width: 100%; height: auto; aspect-ratio: 16 / 9; }
      .cs-img-wrap.tall { width: 100%; height: auto; aspect-ratio: 3 / 4; }

      /* Carousel mobile */
      .cs-carousel-wrap { gap: 12px; }
      .cs-arrow-btn     { flex: 0 0 44px; width: 44px; }
      .cs-carousel-thumb { flex: 0 0 120px; width: 120px; height: 120px; }

      .cs-footer {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 16px;
        position: static;
      }
      .secret-button {
        position: static;
        transform: none;
        margin-top: 8px;
      }
    }