.lumen-meter {
     font-size: 0.052086vw;
    scroll-behavior: auto;
  }
  
  * { box-sizing: border-box; }
  
  .lumen-meter,
  .lumen-meter body {
    margin: 0;
    padding: 0;
    width: 100%;
    background: var(--lumen-color-page);
    color: var(--lumen-color-body-text);
    font-family: var(--lumen-font-sans);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color 0.25s linear;
  }
  
  /* ---------- Page loader  ---------- */
  .page-loader {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: #ffffff;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: transform;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
  }

  .page-loader.page-loader--slide-up {
    transform: translate3d(0, -100%, 0);
  }

  .page-loader__bg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center center;
    pointer-events: none;
    user-select: none;
  }

  .page-loader__content {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16rem;
    pointer-events: none;
    text-align: center;
  }

  .page-loader__percentage {
    margin: 0;
    line-height: 1;
    letter-spacing: -0.02em;
    font-variant-numeric: tabular-nums;
    color: #007981;
  }

  .page-loader__pct-num {
    font-weight: 700;
    font-size: clamp(80rem, 11.2vw, 215rem);
  }

  .page-loader__pct-sym {
    font-weight: 700;
    font-size: clamp(48rem, 6.25vw, 120rem);
  }

  .page-loader__text {
    margin: 0;
    font-weight: 500;
    font-size: clamp(16rem, 1.15vw, 22rem);
    line-height: 1.35;
    color: #0f3133;
    white-space: nowrap;
  }

  .page-loader__progress {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 20rem;
    background: #ffffff;
    overflow: hidden;
    z-index: 3;
  }

  .page-loader__progress-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--lumen-color-preloader-fill-start), var(--lumen-color-preloader-fill-end));
    transition: width 0.12s linear;
  }
  
  /* ---------- Scroll scrubber ---------- */
  .scrubber {
    position: relative;
    width: 100%;
    /* Scroll track length: lower = fewer pixels to play through all frames */
    height: calc(100vh + 4000rem);
  }
  
  .sticky-stage {
    position: sticky;
    top: 0;
    width: 100%;
    height: 100vh;
    overflow: hidden;
    background: var(--lumen-color-page);
    transition: background-color 0.25s linear;
  }
  
  #hero-canvas {
    display: block;
    width: 100%;
    height: 100%;
  }
  .lumen-meter sup {
    font-size: 60%;
}
  /* Landing data-flow lines — box sized in JS to match canvas */
  .landing-data-video {
    position: absolute;
    left: 0;
    top: 0;
    z-index: 4;
    pointer-events: none;
    opacity: 1;
    will-change: opacity;
    overflow: hidden;
  }

  .landing-bottom-video {
    opacity: 0;
  }

  .landing-data-video--hidden {
    visibility: hidden;
  }

  .landing-data-video__media {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: fill;
  }

  /* Home overlays: locked 1920×1080 artboard scaled to viewport */
  .home-artboard-host {
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    z-index: 5;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    overflow: hidden;
  }

  .home-artboard {
    position: relative;
    width: 1920rem;
    height: 1080rem;
    flex-shrink: 0;
    transform-origin: center center;
    pointer-events: none;
  }
  
  /* ---------- Left icon rail ---------- */
  .stage-rail-nav {
    position: fixed;
    inset: 0;
    z-index: 90;
    pointer-events: none;
    --rail-icon-color: #0f3133;
    --rail-hover-bg: #99f5f5;
    --rail-tip-bg: #0f3133;
    --rail-accent-gradient: linear-gradient(102deg, #f95e4a 29.64%, #fb8429 93.46%);
  }

  .stage-rail-nav__shell {
    position: fixed;
    left: 34rem;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1;
    pointer-events: auto;
  }

  .stage-rail-nav__icons {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4rem;
  }

  .stage-rail-nav__icons > li {
    margin: 0;
    padding: 0;
  }

  .stage-rail-nav__icon-btn {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50rem;
    height: 50rem;
    border: none;
    border-radius: 50%;
    background: transparent;
    color: var(--rail-icon-color);
    text-decoration: none;
    cursor: pointer;
    transition: background 0.2s ease, color 0.2s ease, filter 0.2s ease;
    box-sizing: border-box;
  }

  .stage-rail-nav__icon {
    display: block;
    width: 24rem;
    height: 24rem;
    flex-shrink: 0;
    color: inherit;
  }

  .stage-rail-nav__icon svg {
    display: block;
    width: 100%;
    height: 100%;
  }

  .stage-rail-nav__icon-btn[aria-current="page"] {
    background: var(--rail-accent-gradient);
    color: #ffffff;
  }

  .stage-rail-nav__icon-btn[aria-current="page"]:hover {
    filter: brightness(1.05);
  }

  .stage-rail-nav__icon-btn:not([aria-current="page"]):hover,
  .stage-rail-nav__icon-btn:not([aria-current="page"]):focus-visible {
    background: var(--rail-hover-bg);
    color: var(--rail-icon-color);
  }

  .stage-rail-nav__tip {
    position: absolute;
    left: calc(100% + 15rem);
    top: 50%;
    transform: translateY(-50%);
    padding: 6rem 12rem;
    border-radius: 6rem;
    background: var(--rail-tip-bg);
    color: #ffffff;
    font-family: var(--lumen-font-sans);
    font-size: 12rem;
    font-weight: 400;
    line-height: 1;
    letter-spacing: -0.06em;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.18s ease, visibility 0.18s ease;
  }

  .stage-rail-nav__tip::before {
    content: "";
    position: absolute;
    left: -5rem;
    top: 50%;
    transform: translateY(-50%);
    border-width: 5rem 6rem 5rem 0;
    border-style: solid;
    border-color: transparent var(--rail-tip-bg) transparent transparent;
  }

  .stage-rail-nav__icon-btn:hover .stage-rail-nav__tip,
  .stage-rail-nav__icon-btn:focus-visible .stage-rail-nav__tip {
    opacity: 1;
    visibility: visible;
  }

  .stage-rail-nav__icon-btn:focus-visible {
    outline: 2rem solid #fb8429;
    outline-offset: 2rem;
  }
  
  /* ---------- Persistent header ---------- */
  .stage-header {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    z-index: 86;
    pointer-events: auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 5rem clamp(24rem, 4vw, 48rem);
    background: var(--lumen-header-bg);
    backdrop-filter: blur(15rem);
    -webkit-backdrop-filter: blur(15rem);
    height: 80rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
  }
  .stage-header__logo {
    display: block;
    width: auto;
    height: 28rem;
    object-fit: contain;
  }
  .stage-header__logo--meter {
    height: 45rem;
  }
  
  /* ---------- Story caption opacity from JS ---------- */
  .story-caption {
    position: absolute;
    left: 0;
    right: 0;
    top: 105rem;
    z-index: 7;
    display: flex;
    justify-content: center;
    padding: 0 clamp(24rem, 4vw, 48rem);
    pointer-events: none;
    opacity: 0;
  }
  .story-caption__text,
  .overlay-vendors__title {
    margin: 0;
    max-width: 1100rem;
    text-align: center;
    font-weight: 700;
    font-size: clamp(18rem, 3.2vw, 40rem);
    line-height: 1.28;
    color: var(--lumen-color-headline);
    letter-spacing: -0.02em;
  }
  
  /* ---------- Frame-synced copy opacity from JS ---------- */
  .frame-overlays {
    position: absolute;
    inset: 0;
    z-index: 8;
    pointer-events: none;
  }
  .frame-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    opacity: 0;
    pointer-events: none;
    align-items: flex-start;
    justify-content: center;
    padding: 112rem clamp(24rem, 4vw, 48rem) 140rem;
  }
  .frame-overlay--vendors {
    padding-top: 105rem;
    align-items: flex-start;
    justify-content: center;
  }
  .frame-overlay--whatif {
    justify-content: flex-start;
    align-items: flex-start;
    padding: 96rem clamp(24rem, 4vw, 48rem) 48rem clamp(32rem, 5vw, 64rem);
  }
  .frame-overlay--meter {
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding-top: clamp(72rem, 11.5vh, 112rem);
    gap: 4rem;
  }
  
  .overlay-whatif__title {
    margin: 0;
    max-width: 855rem;
    text-align: left;
    font-weight: 800;
    font-size: clamp(22rem, 4vw, 68rem);
    line-height: 1.15;
    color: var(--lumen-color-headline);
    letter-spacing: -0.02em;
    padding-top: 55rem;
  }
  
  .overlay-meter__copy {
    text-align: center;
    max-width: 1115rem;
    opacity: 0;
    transition: opacity 0.3s ease;
  }
  .overlay-meter__title {
    margin: 0 0 3rem;
    font-weight: 800;
    font-size: clamp(20rem, 3.2vw, 50rem);
    line-height: 1.2;
    color: var(--lumen-color-headline);
  }
  .overlay-meter__line {
    margin: 0 0 4rem;
    font-weight: 800;
    font-size: clamp(18rem, 2.8vw, 50rem);
    line-height: 1.2;
    color: var(--lumen-color-headline);
  }
  .overlay-meter__hint {
    margin: 0;
    font-weight: 500;
    font-size: clamp(14rem, 2vw, 26rem);
    color: #3F4145;
    padding-top: 5rem;
  }

  @media (prefers-reduced-motion: no-preference) {
    @keyframes meter-copy-slide-up {
      from {
        transform: translate3d(0, 28rem, 0);
      }
      to {
        transform: translate3d(0, 0, 0);
      }
    }

    .overlay-meter__copy.overlay-meter__copy--ltr .overlay-meter__title {
      animation: meter-copy-slide-up 0.55s cubic-bezier(0.22, 1, 0.36, 1) both;
    }

    .overlay-meter__copy.overlay-meter__copy--ltr .overlay-meter__line {
      animation: meter-copy-slide-up 0.55s cubic-bezier(0.22, 1, 0.36, 1) 0.1s both;
    }

    .overlay-meter__copy.overlay-meter__copy--ltr .overlay-meter__hint {
      animation: meter-copy-slide-up 0.55s cubic-bezier(0.22, 1, 0.36, 1) 0.2s both;
    }
  }
  .overlay-meter__usecases {
    position: absolute;
    inset: 0;
    pointer-events: none;
  }
  a.usecase-btn {
      text-decoration: none;
      color: inherit;
      box-sizing: border-box;
  }
  .usecase-btn {
      position: absolute;
      display: none;
      align-items: center;
      gap: 5rem;
      border: none;
      border-radius: 12rem 12rem 12rem 0;
      padding: 10rem 10rem 10rem 15rem;
      font-family: var(--lumen-font-sans);
      font-weight: 400;
      font-size: clamp(13rem, 1.4vw, 24rem);
      line-height: 1.2;
      color: #ffffff;
      cursor: pointer;
      background: linear-gradient(90deg, #FA6498 0%, #FA6985 11%, #FA745D 38%, #FA7D40 63%, #FA822F 84%, #FB8429 100%);
      box-shadow: 0 4rem 18rem rgba(250, 100, 152, 0.35);
      transition: transform 0.2s ease, box-shadow 0.2s ease, opacity 0.3s ease;
      pointer-events: none;
      opacity: 0;
  }
  .usecase-btn:hover {
    transform: translateY(-2rem);
    box-shadow: 0 6rem 22rem rgba(250, 100, 152, 0.45);
  }
  .usecase-btn:focus-visible {
    outline: 2rem solid var(--lumen-color-headline);
    outline-offset: 3rem;
  }
  .usecase-btn__label {
    white-space: nowrap;
    color:#ffffff;
  }
  .usecase-btn__arrow {
    display: flex;
    align-items: center;
    flex-shrink: 0;
  }
  .usecase-btn__arrow img {
    display: block;
    width: 28rem;
  }
  /* Scattered positions matching (% of stage dimensions) */
  .usecase-btn--retail {
    left: 27.7%;
      top: 32%;
      height: 48rem;
  }
  .usecase-btn--offices {
      right: 28.6%;
      top: 26.2%;
      height: 48rem;
  }
  .usecase-btn--education {
      left: 40.5%;
      bottom: 32%;
      height: 48rem;
  }
  .usecase-btn--warehouses {
      right: 21%;
      bottom: 39%;
      height: 48rem;
  }
  
  /* ---------- Hero intro (over scrubbed frames) ---------- */
  .hero-intro {
    position: absolute;
    inset: 0;
    z-index: 5;
    display: flex;
    flex-direction: column;
    pointer-events: none;
  }
  .hero-intro.hero-intro--inactive {
    visibility: hidden;
  }
  .hero-intro__center {
      flex: 1;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      text-align: center;
      padding: 0 clamp(20rem, 5vw, 48rem);
      padding-bottom: clamp(48rem, 7vh, 96rem);
      will-change: opacity, transform;
      top: 60rem;
      position: relative;
  }
  .hero-intro__title,
  .hero-intro__cta {
    opacity: 0;
    transform: translateY(32rem);
  }
  .hero-intro.hero-intro--revealed .hero-intro__title {
    animation: hero-intro-fade-up 1s cubic-bezier(0.22, 1, 0.36, 1) 0.2s forwards;
  }
  .hero-intro.hero-intro--revealed .hero-intro__cta {
    animation: hero-intro-fade-up 1s cubic-bezier(0.22, 1, 0.36, 1) 0.55s forwards;
    pointer-events: auto;
  }
  .hero-intro.hero-intro--revealed-instant .hero-intro__title,
  .hero-intro.hero-intro--revealed-instant .hero-intro__cta {
    opacity: 1;
    transform: none;
    animation: none;
  }
  @keyframes hero-intro-fade-up {
    from {
      opacity: 0;
      transform: translateY(32rem);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
  .hero-intro__title {
    margin: 0;
    max-width: 955rem;
    font-weight: 900;
    font-size: clamp(20rem, 5.5vw, 74rem);
    line-height: 1.12;
    color: var(--lumen-color-headline);
    letter-spacing: -0.02em;
  }
  .hero-intro__cta {
    pointer-events: none;
    margin-top: clamp(20rem, 4vh, 40rem);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8rem;
    padding: 12rem 16rem;
    border: none;
    border-radius: 99rem;
    cursor: pointer;
    font-family: var(--lumen-font-sans);
    font-weight: 400;
    font-size: clamp(16rem, 2vw, 22rem);
    line-height: 1.2;
    color: var(--lumen-color-text-on-cta);
    background: linear-gradient(90deg, var(--lumen-color-cta-start), var(--lumen-color-cta-end));
    box-shadow: 0 4rem 20rem rgba(249, 94, 74, 0.35);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
  }
  .hero-intro__cta:hover {
    transform: translateY(-1rem);
    box-shadow: 0 6rem 24rem rgba(249, 94, 74, 0.45);
  }
  .hero-intro__cta:focus-visible {
    outline: 2rem solid var(--lumen-color-headline);
    outline-offset: 3rem;
  }
  .hero-intro__cta-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24rem;
    height: 24rem;
    flex-shrink: 0;
  }
  .hero-intro__cta-icon svg {
    display: block;
    width: 100%;
    height: 100%;
  }
  
  @media (max-width: 768px) {
    .stage-header {
      padding: 20rem 20rem;
    }
    .stage-header__logo {
      height: 24rem;
    }
    .stage-header__logo--meter {
      height: 38rem;
    }
  }