/* ============================================================
       TURIYA — OPTION: Sticky Stack & Scale (depth cards)
       Full-bleed cards sticky-stack; as the next card rises over the
       current, the current scales down + dims, giving real depth.
       Natural scroll (no wheel-lock). Scoped under .stack-* .
       ============================================================ */
    .turiya-section { overflow: visible !important; }

    .stack { position: relative; background: #0c0f0d; }

    .stack-card {
      position: sticky;
      top: 0;
      height: 100vh;
      height: 100svh;
      overflow: hidden;
      transform-origin: center center;
      will-change: transform;
      background: #0c0f0d;
    }

    .stack-media {
      position: absolute;
      inset: 0;
      width: 100%;
      height: 100%;
      background-size: cover;
      background-position: center;
      transform: scale(1.06);
    }

    .turiya-inline-media {
      max-width: 1000px;
      margin: 28px auto 100px;
      padding: 0 20px;
      overflow: hidden;
      background: transparent;
    }
    .turiya-inline-video {
      display: block;
      width: 100%;
      height: auto;
      aspect-ratio: 16 / 9;
      object-fit: cover;
      border-radius: 12px;
      background: #000;
    }

    /* Permanent legibility scrim toward the caption. */
    .stack-card::before {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(0,0,0,0.35) 0%, rgba(0,0,0,0.05) 32%, rgba(0,0,0,0.35) 72%, rgba(0,0,0,0.68) 100%);
      pointer-events: none;
      z-index: 1;
    }

    .stack-caption {
      position: absolute;
      left: clamp(20px, 7vw, 110px);
      bottom: clamp(84px, 15vh, 150px);
      z-index: 2;
      max-width: min(90vw, 520px);
      color: #fff;
    }
    .stack-num {
      display: block;
      font-size: clamp(2.6rem, 6vw, 4.4rem);
      font-weight: 300;
      line-height: 1;
      color: rgba(255, 255, 255, 0.5);
      margin-bottom: 8px;
      font-variant-numeric: tabular-nums;
      text-shadow: 0 2px 20px rgba(0, 0, 0, 0.4);
    }
    .stack-kicker {
      display: inline-block;
      font-size: 0.8rem;
      letter-spacing: 0.24em;
      text-transform: uppercase;
      font-weight: 600;
      color: #cfe6a8;
      margin-bottom: 14px;
    }
    .stack-caption h3 {
      font-size: clamp(1.7rem, 3.4vw, 3rem);
      font-weight: 500;
      line-height: 1.12;
      margin: 0;
      text-shadow: 0 2px 24px rgba(0, 0, 0, 0.45);
    }
    .stack-caption p {
      margin: 14px 0 0;
      font-size: 1.06rem;
      line-height: 1.55;
      color: rgba(255, 255, 255, 0.9);
      max-width: 40ch;
      text-shadow: 0 1px 16px rgba(0, 0, 0, 0.5);
    }
    .stack-caption ul {
      list-style: none;
      margin: 16px 0 0;
      padding: 0;
      display: flex;
      flex-direction: column;
      gap: 7px;
    }
    .stack-caption ul li {
      font-size: 1.04rem;
      color: rgba(255, 255, 255, 0.92);
      text-shadow: 0 1px 16px rgba(0, 0, 0, 0.5);
    }

    /* Depth-dim overlay — sits ABOVE everything so the whole card darkens
       uniformly as it recedes behind the next one (JS animates its opacity). */
    .stack-shade {
      position: absolute;
      inset: 0;
      z-index: 3;
      background: #0a0d0b;
      opacity: 0;
      pointer-events: none;
    }

    /* Fixed Location | Download pill — shown only while the section is on screen. */
    .stack-bar {
      position: fixed;
      top: clamp(16px, 4vh, 34px);
      left: 50%;
      transform: translateX(-50%);
      z-index: 40;
      display: flex;
      align-items: center;
      gap: 14px;
      padding: 12px 26px;
      border-radius: 999px;
      background: rgba(18, 26, 22, 0.6);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid rgba(255, 255, 255, 0.2);
      white-space: nowrap;
      opacity: 0;
      visibility: hidden;
      pointer-events: none;
      transition: opacity 0.45s ease, visibility 0.45s ease;
    }
    .stack-bar.is-visible {
      opacity: 1;
      visibility: visible;
      pointer-events: auto;
    }
    .stack-bar a { color: #fff; text-decoration: none; font-size: 0.92rem; }
    .stack-bar a:hover { color: #cfe6a8; }
    .stack-bar .stack-div { color: rgba(255, 255, 255, 0.4); }

    @media (max-width: 768px) {
      .stack-caption {
        left: 20px;
        right: 20px;
        max-width: none;
        bottom: clamp(96px, 15vh, 118px);
      }
      .stack-caption p { max-width: none; }
      .turiya-inline-media {
        max-width: 1000px;
        margin: 22px auto 100px;
        padding: 0 20px;
      }

      .stack.mobile-slider-active {
        position: relative;
        padding: 0;
        background: transparent;
      }

      .stack.mobile-slider-active .stack-card {
        position: relative;
        top: auto;
        min-height: 62svh;
        height: 62svh;
        display: none;
        overflow: hidden;
      }

      .stack.mobile-slider-active .stack-card.is-mobile-active {
        display: block;
      }

      .stack.mobile-slider-active .stack-bar {
        position: absolute;
        top: 18px;
        left: 50%;
        transform: translateX(-50%);
        width: max-content;
        max-width: calc(100% - 28px);
        margin: 0;
        padding: 10px 18px;
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        z-index: 45;
        background: transparent;
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
      }

      .stack.mobile-slider-active .stack-bar a {
        font-size: 0.85rem;
      }

      .stack-mobile-controls {
        display: none;
      }

      .stack.mobile-slider-active .stack-mobile-controls {
        position: absolute;
        left: 50%;
        bottom: 18px;
        transform: translateX(-50%);
        z-index: 45;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 14px;
        width: calc(100% - 28px);
        margin: 0;
      }

      .stack.mobile-slider-active .stack-mobile-arrow {
        width: 44px;
        height: 44px;
        border: 1px solid rgba(255, 255, 255, 0.3);
        border-radius: 999px;
        background: transparent;
        color: #fff;
        font-size: 1.1rem;
        line-height: 1;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
      }

      .stack.mobile-slider-active .stack-mobile-status {
        min-width: 88px;
        padding: 10px 16px;
        border-radius: 999px;
        background: transparent;
        border: 1px solid rgba(255, 255, 255, 0.22);
        color: #fff;
        text-align: center;
        font-size: 0.9rem;
        letter-spacing: 0.12em;
        text-transform: uppercase;
      }

      .stack.mobile-slider-active .stack-mobile-sep {
        opacity: 0.45;
        margin: 0 4px;
      }
    }

    /* Reduced motion: plain stack, no scale/dim, captions visible, static pill. */
    .reduced-motion .stack-card { transform: none !important; }
    .reduced-motion .stack-shade { opacity: 0 !important; }
    .reduced-motion .stack-bar {
      position: absolute;
      opacity: 1;
      visibility: visible;
      pointer-events: auto;
    }

    /* ============================================================
       HOW WE BUILD — layout tweak (preview override only):
       centre the heading, and drop the slider controls (progress +
       arrows) to the BOTTOM, beneath the slide track.
       display:contents lifts the header's children into the wrapper
       flex column so we can reorder them.
       ============================================================ */
    /* Progress bar + number compact on line 1; arrows on line 2 (all widths). */
    #how-we-build .progress-wrapper {
      width: 100%;
      max-width: 190px;
    }

    @media (min-width: 768px) {
      #how-we-build .hwb-header {
        display: contents;
      }
      #how-we-build .hwb-header h3 {
        order: 1;
        width: 100%;
        text-align: center;
        margin: 120px auto 72px;
      }
      #how-we-build .hwb-track {
        order: 2;
      }
      #how-we-build .hwb-controls {
        order: 3;
        width: 100%;
        max-width: 1600px;
        margin: 72px auto 0;
        padding: 0 5%;
        flex-direction: column;
        align-items: center;
        gap: 18px;
        justify-content: center;
      }
    }