:root {
      --bg: #050608;
      --panel: rgba(255, 255, 255, 0.035);
      --text: #f3f5f8;
      --muted: #9ea8b8;
      --left-top: #0c1421;
      --left-bottom: #0043a1;
      --right-top: #150d11;
      --right-bottom: #850035;
      --line: rgba(255, 255, 255, 0.2);
      --shadow: 0 20px 60px rgba(0, 0, 0, 0.32);
    }

    * {
      box-sizing: border-box;
    }

    html,
    body {
      width: 100%;
      height: 100%;
      margin: 0;
      overflow: hidden;
      background: var(--bg);
      color: var(--text);
      font-family: Inter, system-ui, sans-serif;
    }

    body.impress-not-supported .fallback-message {
      display: block;
    }

    .fallback-message {
      display: none;
      max-width: 900px;
      margin: 4rem auto;
      padding: 2rem;
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: 24px;
    }

    .step {
      position: relative;
      width: 1920px;
      height: 1080px;
      padding: 20px;
      opacity: 0;
      visibility: hidden;
      pointer-events: none;
    }

    .step.active {
      opacity: 1;
      visibility: visible;
      pointer-events: auto;
    }

    .step.fade-step {
      transition: opacity 220ms ease;
    }

    .step.act-title.future,
    .step.act-title.past {
      opacity: 0.12;
      visibility: visible;
    }

    .step.act-title.active {
      opacity: 1;
      visibility: visible;
    }

    .frame {
      width: 100%;
      height: 100%;
      border-radius: 32px;
      background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0.015));
      box-shadow: var(--shadow);
      overflow: hidden;
      position: relative;
    }

    .title-slide {
      display: grid;
      grid-template-columns: 1fr 1fr;
      position: relative;
    }

    .title-slide::after {
      content: "";
      position: absolute;
      top: 0;
      left: 50%;
      width: 2px;
      height: 100%;
      transform: translateX(-50%);
      background: rgba(180, 185, 195, 0.35);
    }

    .half {
      position: relative;
      padding: 64px 64px 50px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .half.left {
      background: linear-gradient(180deg, var(--left-top), var(--left-bottom));
    }

    .half.right {
      background: linear-gradient(180deg, var(--right-top), var(--right-bottom));
    }

    .eyebrow {
      display: inline-block;
      font-size: 15px;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      color: var(--muted);
    }

    .vibe-mark {
      display: inline-block;
      font-size: 18px;
      font-weight: 700;
      letter-spacing: -0.02em;
      color: rgba(255, 255, 255, 0.92);
    }

    .topline {
      display: flex;
      justify-content: space-between;
      align-items: baseline;
      gap: 20px;
    }

    .side-copy {
      max-width: 570px;
    }

    .side-copy.right {
      margin-left: auto;
      text-align: right;
    }

    h1 {
      margin: 0;
      font-size: 88px;
      line-height: 0.94;
      letter-spacing: -0.052em;
      font-weight: 800;
    }

    .right h1 {
      max-width: 560px;
      margin-left: auto;
    }

    .nameplate {
      font-size: 18px;
      color: var(--muted);
      letter-spacing: -0.01em;
    }

    .nameplate.right {
      text-align: right;
    }

    .center-title {
      position: absolute;
      left: 50%;
      top: 50%;
      transform: translate(-50%, -50%);
      z-index: 5;
      width: 900px;
      text-align: center;
      pointer-events: none;
    }

    .center-title .main {
      font-size: 104px;
      line-height: 0.94;
      font-weight: 800;
      letter-spacing: -0.06em;
      margin: 0;
      text-wrap: balance;
    }

    .center-title .sub {
      margin-top: 18px;
      font-size: 30px;
      line-height: 1.28;
      color: var(--text);
      letter-spacing: -0.01em;
    }

    .nav-note {
      position: absolute;
      right: 28px;
      bottom: 24px;
      z-index: 8;
      font-family: "IBM Plex Mono", monospace;
      font-size: 15px;
      color: rgba(255, 255, 255, 0.4);
    }

    .mini-slide {
      position: relative;
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 30px;
      padding: 56px;
      overflow: hidden;
    }

    .mini-slide>* {
      position: relative;
      z-index: 1;
    }

    /* base card stays layout-focused */
    .mini-card {
      border-radius: 28px;
      padding: 34px;
      position: relative;
      overflow: hidden;
    }

    .mini-card-left {
      background: linear-gradient(180deg,
          var(--left-top),
          var(--left-bottom));
    }

    .mini-card-right {
      background: linear-gradient(180deg,
          var(--right-top),
          var(--right-bottom));
    }

    h2 {
      margin: 0 0 18px;
      font-size: 58px;
      line-height: 1;
      letter-spacing: -0.04em;
    }

    p,
    li {
      font-size: 28px;
      line-height: 1.4;
      color: #d9dfeb;
    }

    ul {
      margin: 0;
      padding-left: 1.1em;
    }

    .google-mock {
      aspect-ratio: 16 / 9;
      border-radius: 26px;
      border: 1px solid rgba(255, 255, 255, 0.08);
      overflow: hidden;
      background: #0d111a;
      display: grid;
      grid-template-columns: 1fr 1fr;
      position: relative;
    }

    .google-mock::after {
      content: "";
      position: absolute;
      top: 0;
      left: 50%;
      width: 2px;
      height: 100%;
      transform: translateX(-50%);
      background: linear-gradient(180deg, transparent, rgba(255, 255, 255, 0.35), transparent);
    }

    .google-side {
      padding: 26px;
      position: relative;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .google-side.left {
      background: linear-gradient(180deg, #0c1421, #09101a);
    }

    .google-side.right {
      background: linear-gradient(180deg, #150d11, #10090d);
    }

    .google-side h3 {
      margin: 0;
      font-size: 32px;
      line-height: 1.1;
      letter-spacing: -0.03em;
      max-width: 9ch;
    }

    .google-side.right h3 {
      margin-left: auto;
      text-align: right;
    }

    .google-label {
      font-size: 14px;
      color: rgba(255, 255, 255, 0.62);
    }

    .google-center {
      position: absolute;
      left: 50%;
      top: 52%;
      transform: translate(-50%, -50%);
      text-align: center;
      width: 310px;
    }

    .google-center strong {
      display: block;
      font-size: 42px;
      line-height: 0.95;
      letter-spacing: -0.05em;
    }

    .google-center span {
      display: block;
      margin-top: 8px;
      font-size: 14px;
      color: var(--muted);
      line-height: 1.3;
    }

    .specs {
      display: grid;
      gap: 14px;
      margin-top: 22px;
    }

    .spec {
      padding: 16px 18px;
      border-radius: 16px;
      border: 1px solid rgba(255, 255, 255, 0.08);
      background: rgba(255, 255, 255, 0.03);
      color: #d7ddea;
      font-size: 23px;
    }

    .kbd {
      display: inline-block;
      padding: 3px 9px;
      border-radius: 8px;
      border: 1px solid rgba(255, 255, 255, 0.16);
      font-family: "IBM Plex Mono", monospace;
      font-size: 0.75em;
      color: #fff;
      background: rgba(255, 255, 255, 0.05);
      vertical-align: middle;
    }

    /* Footer layout (left/right blocks) */
    .meta-block {
      display: flex;
      flex-direction: column;
      justify-content: flex-end;
      height: 100%;
    }

    .meta-block.right {
      align-items: flex-end;
    }

    /* Text styling */
    .meta-text {
      font-size: 25px;
      color: var(--muted);
      line-height: 1.4;
    }

    .meta-text.right {
      text-align: right;
    }

    .meta-title {
      font-size: 35px;
      color: var(--text);
    }

    .meta-block.top {
      justify-content: flex-start;
    }

    .photo-left {
      width: 220px;
      height: 220px;
      object-fit: cover;
      border-radius: 12px;
      margin-bottom: 20px;

      filter: grayscale(1) contrast(1.4) brightness(1.05) sepia(1) hue-rotate(260deg) saturate(1.8);
    }

    .photo-right {
      width: 220px;
      height: 220px;
      object-fit: cover;
      border-radius: 12px;
      margin-bottom: 20px;

      filter: grayscale(1) contrast(1.15) brightness(1.05) sepia(1) hue-rotate(180deg) saturate(1.6);
    }

    .quote {
      margin-top: 32px;
      font-size: 30px;
      line-height: 1.4;
      color: #ffffff;
      max-width: 30ch;
      font-weight: 500;
    }

    .quote.right {
      text-align: right;
      margin-left: auto;
    }

    .shift-card {
      display: flex;
      flex-direction: column;
      justify-content: center;
    }

    .shift-list {
      margin-top: 28px;
      padding-left: 1.05em;
    }

    .shift-list li {
      margin-bottom: 18px;
      font-size: 40px;
      line-height: 1.22;
      color: #ffffff;
      font-weight: 500;
    }

    .shift-tools {
      display: flex;
      align-items: center;
      justify-content: center;
      height: 100%;
    }

    .tool-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
      width: 100%;
      max-width: 520px;
    }

    /* reveal behaviour */
    .item {
      opacity: 0;
      transform: translateY(6px);
      transition: opacity 220ms ease, transform 220ms ease;
    }

    .stage-1 .shift-item-1 {
      opacity: 1;
      transform: translateY(0);
    }

    .stage-2 .shift-item-1,
    .stage-2 .shift-item-2 {
      opacity: 1;
      transform: translateY(0);
    }

    .stage-3 .shift-item-1,
    .stage-3 .shift-item-2,
    .stage-3 .shift-item-3 {
      opacity: 1;
      transform: translateY(0);
    }

    .tool-grid {
      display: grid;
      grid-template-columns: 1fr;
      grid-auto-rows: auto;

      gap: 36px;

      width: 100%;
      height: 100%;

      align-items: center;
      justify-items: center;

      padding: 40px 20px;
    }

    .tool-logo {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 100%;
    }

    .tool-logo img {
      max-width: 210px;
      /* ~50% bigger (was ~140px) */
      max-height: 105px;
      /* ~50% bigger (was ~70px) */
      width: auto;
      height: auto;
      object-fit: contain;

      filter: none;
      opacity: 1;
    }

    /* ensure no hover overrides */
    .tool-logo img:hover {
      filter: none;
      opacity: 1;
    }
  

      .love-list {
        margin-top: 28px;
        padding-left: 1.05em;
      }

      .love-list li {
        margin-bottom: 18px;
        font-size: 38px;
        line-height: 1.25;
        color: #ffffff;
        font-weight: 500;
      }

      .love-quote-card {
        display: flex;
        align-items: center;
        justify-content: center;
      }

      .love-quote {
        font-size: 60px;
        font-weight: bold;
        line-height: 1.25;
        color: #ffffff;
        font-weight: 500;
        text-align: center;
        max-width: 18ch;
        opacity: 0;
        transition: opacity 260ms ease;
      }

      .stage-1 .love-item-1 {
        opacity: 1;
        transform: translateY(0);
      }

      .stage-2 .love-item-1,
      .stage-2 .love-item-2 {
        opacity: 1;
        transform: translateY(0);
      }

      .stage-3 .love-item-1,
      .stage-3 .love-item-2,
      .stage-3 .love-item-3 {
        opacity: 1;
        transform: translateY(0);
      }

      .stage-4 .love-item-1,
      .stage-4 .love-item-2,
      .stage-4 .love-item-3,
      .stage-4 .love-item-4 {
        opacity: 1;
        transform: translateY(0);
      }

      .stage-4 .love-quote {
        opacity: 1;
      }
    

      .terrifying-card {
        display: flex;
        flex-direction: column;
        justify-content: center;
      }

      .terrifying-list {
        margin-top: 28px;
        padding-left: 1.05em;
      }

      .terrifying-list li {
        margin-bottom: 18px;
        font-size: 42px;
        line-height: 1.2;
        color: #ffffff;
        font-weight: 600;
      }

      .terrifying-quote-card {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
      }

      .terrifying-quote {
        font-size: 46px;
        line-height: 1.15;
        color: #ffffff;
        font-weight: 700;
        text-align: center;
      }

      .terrifying-demo-note {
        margin-top: 32px;
        font-size: 32px;
        line-height: 1.35;
        color: rgba(255, 255, 255, 0.86);
        text-align: center;
      }

      .terrifying-demo-note a {
        color: #ffffff;
        text-decoration: underline;
      }

      .terrifying-demo-note a:visited {
        color: #ffffff;
      }

      .terrifying-demo-note a:hover {
        opacity: 0.85;
      }
    

      .demo-history-slide {
        display: grid;
        grid-template-rows: auto 1fr auto;
        gap: 28px;
        padding: 56px;
        background: linear-gradient(180deg, #101317, #0a0c10);
      }

      .history-header h2 {
        margin: 0;
        font-size: 58px;
        line-height: 1;
        letter-spacing: -0.04em;
      }

      .history-sub {
        margin-top: 12px;
        font-size: 24px;
        color: var(--muted);
      }

      .history-grid {
        display: grid;
        grid-template-columns: 1fr 1fr 1fr;
        gap: 26px;
        align-items: start;
      }

      .history-card {
        border-radius: 24px;
        overflow: hidden;
        background: rgba(255, 255, 255, 0.03);
        border: 1px solid rgba(255, 255, 255, 0.08);
        box-shadow: 0 16px 40px rgba(0, 0, 0, 0.22);
      }

      .history-card img {
        display: block;
        width: 100%;
        height: 420px;
        object-fit: cover;
      }

      .history-label {
        padding: 18px 20px 4px;
        font-size: 22px;
        font-weight: 700;
        color: #ffffff;
      }

      .history-caption {
        padding: 0 20px 22px;
        font-size: 20px;
        line-height: 1.35;
        color: var(--muted);
      }

      .history-footer {
        font-size: 30px;
        line-height: 1.25;
        color: #ffffff;
        text-align: center;
      }

      .history-card img {
        display: block;
        width: 100%;
        max-width: 100%;
        height: 360px;
        /* constrain height */
        object-fit: contain;
        /* keep full screenshot visible */
      }

      .history-grid {
        position: relative;
      }

      .history-grid::before {
        content: "";
        position: absolute;
        top: 50%;
        left: 10%;
        right: 10%;
        height: 2px;
        background: rgba(255, 255, 255, 0.08);
        z-index: 0;
      }

      .history-card {
        position: relative;
        z-index: 1;
      }
    

      /* FULL RED BACKGROUND SLIDE */
      .frame.slop-full {
        display: flex;
        align-items: center;
        justify-content: center;

        background: linear-gradient(180deg, var(--right-top), var(--right-bottom));
      }

      .frame.bull-full {
        display: flex;
        align-items: center;
        justify-content: center;

        background: linear-gradient(180deg, var(--left-top), var(--left-bottom));
      }

      /* CONTENT WIDTH */
      .slop-content {
        width: 1200px;
      }

      /* TITLE */
      .slop-title {
        font-size: 92px;
        line-height: 0.95;
        letter-spacing: -0.05em;
        margin-bottom: 48px;
      }

      /* GRID */
      .slop-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 40px;
      }

      /* CARDS */
      .slop-card {
        padding: 36px;
        border-radius: 28px;

        background: rgba(0, 0, 0, 0.35);
        border: 1px solid rgba(255, 255, 255, 0.08);

        box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
      }

      /* LISTS */
      .slop-card ul {
        margin: 0;
        padding-left: 1.05em;
      }

      .slop-card li {
        font-size: 34px;
        line-height: 1.25;
        margin-bottom: 16px;
        color: #ffffff;
        font-weight: 500;
      }
    

      .danger-content {
        text-align: center;
      }

      .danger-title {
        font-size: 96px;
        line-height: 0.95;
        letter-spacing: -0.05em;
        margin-bottom: 60px;
      }

      .danger-lines {
        font-size: 36px;
        line-height: 1.5;
        color: rgba(255, 255, 255, 0.9);
      }

      .danger-footer {
        margin-top: 60px;
        font-size: 44px;
        font-weight: 700;
        color: #ffffff;
      }
    

      .security-wall {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 40px 80px;

        font-size: 28px;
        line-height: 1.5;
        color: rgba(255, 255, 255, 0.85);
        margin-top: 40px;
      }

      .security-col {
        text-align: left;
      }

      .security-footer {
        margin-top: 50px;
        font-size: 42px;
        font-weight: 700;
        color: #ffffff;
      }
    

      .act3-frame {
        position: relative;
        background: #000;
        overflow: hidden;
      }

      .act3-frame::before {
        content: "";
        position: absolute;
        inset: -10%;
        background:
          radial-gradient(circle at 30% 40%, rgba(0, 110, 255, 0.24), transparent 52%),
          radial-gradient(circle at 70% 60%, rgba(255, 40, 90, 0.24), transparent 52%);
        filter: blur(42px);
        opacity: 0.75;
        animation: driftGlow 12s ease-in-out infinite alternate;
        z-index: 0;
      }

      .act3-content {
        position: relative;
        z-index: 1;
        display: flex;
        align-items: center;
        justify-content: center;
        height: 100%;
        text-align: center;
      }

      .act3-content h1 {
        font-size: 96px;
        line-height: 1.05;
        letter-spacing: -0.04em;
        color: rgba(255, 255, 255, 0.96);
      }

      .act3-content .quiet {
        color: rgba(255, 255, 255, 0.72);
      }

      @keyframes driftGlow {
        0% {
          transform: translateX(-2%) translateY(-2%);
          opacity: 0.68;
        }

        50% {
          transform: translateX(2%) translateY(2%);
          opacity: 0.82;
        }

        100% {
          transform: translateX(-1.5%) translateY(2.5%);
          opacity: 0.72;
        }
      }
    

      .flow-full {
        display: flex;
        align-items: center;
        justify-content: center;
        background: #07080b;
        position: relative;
        overflow: hidden;
      }

      .flow-full::before {
        content: "";
        position: absolute;
        inset: 0;
        background:
          radial-gradient(circle at 22% 50%, rgba(0, 110, 255, 0.12), transparent 42%),
          radial-gradient(circle at 78% 50%, rgba(255, 40, 90, 0.12), transparent 42%);
        pointer-events: none;
      }

      .flow-wrap {
        position: relative;
        z-index: 1;
        width: 1320px;
      }

      .flow-title {
        font-size: 92px;
        line-height: 0.95;
        letter-spacing: -0.05em;
        margin: 0 0 22px;
      }

      .flow-sub {
        font-size: 30px;
        line-height: 1.3;
        color: rgba(255, 255, 255, 0.76);
        margin-bottom: 42px;
        max-width: 22ch;
      }

      .flow-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 32px;
      }

      .flow-col {
        padding: 34px 36px;
        border-radius: 28px;
        background: rgba(0, 0, 0, 0.34);
        border: 1px solid rgba(255, 255, 255, 0.08);
        box-shadow: 0 20px 60px rgba(0, 0, 0, 0.32);
      }

      .flow-col-left {
        box-shadow:
          inset 0 0 0 1px rgba(0, 110, 255, 0.10),
          0 20px 60px rgba(0, 0, 0, 0.32);
      }

      .flow-col-right {
        box-shadow:
          inset 0 0 0 1px rgba(255, 40, 90, 0.10),
          0 20px 60px rgba(0, 0, 0, 0.32);
      }

      .flow-heading {
        position: relative;
        font-size: 34px;
        line-height: 1;
        letter-spacing: -0.03em;
        margin-bottom: 22px;
        padding-bottom: 12px;
        color: #ffffff;
      }

      .flow-heading::after {
        content: "";
        position: absolute;
        left: 0;
        bottom: 0;
        width: 100%;
        height: 2px;

        background: rgba(255, 255, 255, 0.18);
      }

      .flow-list {
        list-style: none;
        margin: 0;
        padding: 0;
      }

      .flow-list li {
        font-size: 34px;
        line-height: 1.22;
        color: rgba(255, 255, 255, 0.92);
        padding: 14px 0;
        border-top: 1px solid rgba(255, 255, 255, 0.08);
      }

      .flow-list li:first-child {
        border-top: none;
        padding-top: 0;
      }

      .flow-footer {
        margin-top: 34px;
        font-size: 38px;
        line-height: 1.2;
        font-weight: 700;
        color: #ffffff;
      }
    

      .infra-full {
        display: flex;
        align-items: center;
        justify-content: center;
        position: relative;
        overflow: hidden;
        background: #07080b;
      }

      .infra-full::before {
        content: "";
        position: absolute;
        inset: 0;
        background:
          radial-gradient(circle at 24% 50%, rgba(0, 110, 255, 0.12), transparent 42%),
          radial-gradient(circle at 76% 50%, rgba(255, 40, 90, 0.12), transparent 42%);
        pointer-events: none;
      }

      .infra-wrap {
        position: relative;
        z-index: 1;
        width: 1320px;
      }

      .infra-title {
        font-size: 92px;
        line-height: 0.95;
        letter-spacing: -0.05em;
        margin: 0 0 18px;
      }

      .infra-sub {
        font-size: 34px;
        line-height: 1.25;
        color: rgba(255, 255, 255, 0.78);
        margin-bottom: 42px;
      }

      .infra-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 32px;
      }

      .infra-col {
        padding: 34px 36px;
        border-radius: 28px;
        background: rgba(0, 0, 0, 0.34);
        border: 1px solid rgba(255, 255, 255, 0.08);
        box-shadow: 0 20px 60px rgba(0, 0, 0, 0.32);
      }

      .infra-col-left {
        box-shadow:
          inset 0 0 0 1px rgba(0, 110, 255, 0.10),
          0 20px 60px rgba(0, 0, 0, 0.32);
      }

      .infra-col-right {
        box-shadow:
          inset 0 0 0 1px rgba(255, 40, 90, 0.10),
          0 20px 60px rgba(0, 0, 0, 0.32);
      }

      .infra-heading {
        position: relative;
        font-size: 34px;
        line-height: 1;
        letter-spacing: -0.03em;
        margin-bottom: 22px;
        padding-bottom: 12px;
        color: #ffffff;
      }

      .infra-heading::after {
        content: "";
        position: absolute;
        left: 0;
        bottom: 0;
        width: 100%;
        height: 2px;
        background: rgba(255, 255, 255, 0.18);
      }

      .infra-col-left .infra-heading::after {
        background: linear-gradient(90deg,
            rgba(0, 110, 255, 0.6),
            rgba(255, 255, 255, 0.08));
      }

      .infra-col-right .infra-heading::after {
        background: linear-gradient(90deg,
            rgba(255, 255, 255, 0.08),
            rgba(255, 40, 90, 0.6));
      }

      .infra-list {
        list-style: none;
        margin: 0;
        padding: 0;
      }

      .infra-list li {
        font-size: 34px;
        line-height: 1.22;
        color: rgba(255, 255, 255, 0.92);
        padding: 14px 0;
        border-top: 1px solid rgba(255, 255, 255, 0.08);
      }

      .infra-list li:first-child {
        border-top: none;
        padding-top: 0;
      }

      .infra-footer {
        margin-top: 34px;
        font-size: 38px;
        line-height: 1.2;
        font-weight: 700;
        color: #ffffff;
      }
    

      .deploy-full {
        display: flex;
        align-items: center;
        justify-content: center;
        background: #07080b;
      }

      .deploy-wrap {
        width: 1100px;
      }

      .deploy-title {
        font-size: 88px;
        line-height: 0.95;
        letter-spacing: -0.05em;
        margin: 0 0 40px;
      }

      .deploy-table {
        display: grid;
        grid-template-columns: 0.8fr 1.2fr;
        gap: 0;
        border-top: 2px solid rgba(255, 255, 255, 0.18);
      }

      .deploy-row {
        display: contents;
      }

      .deploy-cell {
        padding: 22px 10px;
        font-size: 36px;
        line-height: 1.2;
        border-bottom: 1px solid rgba(255, 255, 255, 0.12);
      }

      .deploy-header {
        font-size: 24px;
        text-transform: uppercase;
        letter-spacing: 0.08em;
        color: rgba(255, 255, 255, 0.6);
        padding-bottom: 14px;
      }

      .deploy-model {
        font-weight: 600;
        color: #ffffff;
        display: flex;
        align-items: center;
        gap: 10px;
      }

      .deploy-trade {
        color: rgba(255, 255, 255, 0.82);
      }
    

      .zt-full {
        display: flex;
        align-items: center;
        justify-content: center;
        position: relative;
        overflow: hidden;
        background: #07080b;
      }

      .zt-full::before {
        content: "";
        position: absolute;
        inset: 0;
        background:
          radial-gradient(circle at 24% 50%, rgba(0, 110, 255, 0.12), transparent 42%),
          radial-gradient(circle at 76% 50%, rgba(255, 40, 90, 0.12), transparent 42%);
        pointer-events: none;
      }

      .zt-wrap {
        position: relative;
        z-index: 1;
        width: 1380px;
      }

      .zt-title {
        font-size: 86px;
        line-height: 0.95;
        letter-spacing: -0.05em;
        margin: 0 0 14px;
      }

      .zt-sub {
        font-size: 32px;
        line-height: 1.25;
        color: rgba(255, 255, 255, 0.78);
        margin-bottom: 38px;
      }

      .zt-diagram {
        display: grid;
        grid-template-columns: 1fr 120px 1fr 120px 1fr;
        align-items: center;
        gap: 0;
        margin-bottom: 36px;
      }

      .zt-node {
        min-height: 260px;
        padding: 30px 28px;
        border-radius: 28px;
        background: rgba(0, 0, 0, 0.34);
        border: 1px solid rgba(255, 255, 255, 0.09);
        box-shadow: 0 20px 60px rgba(0, 0, 0, 0.32);
        display: flex;
        flex-direction: column;
        justify-content: center;
        text-align: center;
      }

      .zt-node.user {
        box-shadow:
          inset 0 0 0 1px rgba(0, 110, 255, 0.10),
          0 20px 60px rgba(0, 0, 0, 0.32);
      }

      .zt-node.identity {
        box-shadow:
          inset 0 0 0 1px rgba(255, 255, 255, 0.08),
          0 20px 60px rgba(0, 0, 0, 0.32);
      }

      .zt-node.service {
        box-shadow:
          inset 0 0 0 1px rgba(255, 40, 90, 0.10),
          0 20px 60px rgba(0, 0, 0, 0.32);
      }

      .zt-kicker {
        font-family: "IBM Plex Mono", monospace;
        font-size: 18px;
        letter-spacing: 0.06em;
        text-transform: uppercase;
        color: rgba(255, 255, 255, 0.52);
        margin-bottom: 12px;
      }

      .zt-node-title {
        font-size: 38px;
        line-height: 1.05;
        letter-spacing: -0.03em;
        color: #ffffff;
        margin-bottom: 14px;
      }

      .zt-node-copy {
        font-size: 26px;
        line-height: 1.35;
        color: rgba(255, 255, 255, 0.78);
      }

      .zt-arrow {
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 56px;
        color: rgba(255, 255, 255, 0.42);
      }

      .zt-public {
        margin-top: 10px;
        padding: 18px 24px;
        border-radius: 18px;
        border: 1px dashed rgba(255, 255, 255, 0.14);
        color: rgba(255, 255, 255, 0.46);
        font-size: 24px;
        text-align: center;
      }

      .zt-footer {
        font-size: 40px;
        line-height: 1.2;
        font-weight: 700;
        color: #ffffff;
        text-align: center;
      }
    

      .vc-full {
        display: flex;
        align-items: center;
        justify-content: center;
        position: relative;
        overflow: hidden;
        background: #07080b;
      }

      .vc-full::before {
        content: "";
        position: absolute;
        inset: 0;
        background:
          radial-gradient(circle at 24% 50%, rgba(0, 110, 255, 0.12), transparent 42%),
          radial-gradient(circle at 76% 50%, rgba(255, 40, 90, 0.12), transparent 42%);
        pointer-events: none;
      }

      .vc-wrap {
        position: relative;
        z-index: 1;
        width: 1280px;
        text-align: center;
      }

      .vc-title {
        font-size: 92px;
        line-height: 0.95;
        letter-spacing: -0.05em;
        margin: 0 0 34px;
      }

      .vc-main {
        font-size: 54px;
        line-height: 1.12;
        letter-spacing: -0.03em;
        color: #ffffff;
        margin-bottom: 28px;
        font-weight: 700;
      }

      .vc-split {
        display: grid;
        grid-template-columns: 1fr auto 1fr;
        align-items: center;
        gap: 28px;
        margin: 42px 0 46px;
      }

      .vc-side {
        padding: 28px 24px;
        border-radius: 24px;
        background: rgba(0, 0, 0, 0.28);
        border: 1px solid rgba(255, 255, 255, 0.08);
        font-size: 38px;
        line-height: 1.2;
        color: rgba(255, 255, 255, 0.92);
        box-shadow: 0 18px 50px rgba(0, 0, 0, 0.28);
      }

      .vc-side.left {
        box-shadow:
          inset 0 0 0 1px rgba(0, 110, 255, 0.10),
          0 18px 50px rgba(0, 0, 0, 0.28);
      }

      .vc-side.right {
        box-shadow:
          inset 0 0 0 1px rgba(255, 40, 90, 0.10),
          0 18px 50px rgba(0, 0, 0, 0.28);
      }

      .vc-divider {
        font-size: 38px;
        color: rgba(255, 255, 255, 0.48);
        font-weight: 600;
      }

      .vc-footer {
        font-size: 40px;
        line-height: 1.22;
        font-weight: 700;
        color: #ffffff;
      }
    

      .challenge-full {
        display: flex;
        align-items: center;
        justify-content: center;
        position: relative;
        overflow: hidden;
        background: #07080b;
      }

      .challenge-full::before {
        content: "";
        position: absolute;
        inset: 0;
        background:
          radial-gradient(circle at 24% 50%, rgba(0, 110, 255, 0.12), transparent 42%),
          radial-gradient(circle at 76% 50%, rgba(255, 40, 90, 0.12), transparent 42%);
        pointer-events: none;
      }

      .challenge-wrap {
        position: relative;
        z-index: 1;
        width: 1200px;
      }

      .challenge-title {
        font-size: 88px;
        line-height: 0.95;
        letter-spacing: -0.05em;
        margin: 0 0 40px;
      }

      .challenge-list {
        display: grid;
        gap: 18px;
      }

      .challenge-item {
        padding: 28px 30px;
        border-radius: 24px;
        background: rgba(0, 0, 0, 0.34);
        border: 1px solid rgba(255, 255, 255, 0.10);
        box-shadow: 0 20px 60px rgba(0, 0, 0, 0.32);

        display: grid;
        grid-template-columns: 42px 1fr;
        gap: 18px;
        align-items: center;
      }

      .challenge-num {
        font-size: 28px;
        color: rgba(255, 255, 255, 0.5);
        font-family: "IBM Plex Mono", monospace;
      }

      .challenge-text {
        font-size: 36px;
        line-height: 1.2;
        color: #ffffff;
      }

      .challenge-sub {
        display: block;
        font-size: 26px;
        line-height: 1.3;
        color: rgba(255, 255, 255, 0.7);
        margin-top: 6px;
      }

      .challenge-footer {
        margin-top: 36px;
        font-size: 38px;
        line-height: 1.2;
        font-weight: 700;
        color: #ffffff;
        text-align: center;
      }
    

      .agentic-full {
        display: flex;
        align-items: center;
        justify-content: center;
        position: relative;
        overflow: hidden;
        background: #07080b;
      }

      /* purple blend field */
      .agentic-full::before {
        content: "";
        position: absolute;
        inset: -10%;

        background: radial-gradient(circle at 50% 50%,
            rgba(110, 69, 188, 0.442),
            rgba(90, 40, 160, 0.18) 40%,
            rgba(40, 10, 80, 0.12) 70%,
            transparent 100%);

        filter: blur(50px);
        opacity: 0.75;
        pointer-events: none;
      }

      .agentic-wrap {
        position: relative;
        z-index: 1;
        width: 1400px;
        text-align: center;
      }

      .agentic-title {
        font-size: 96px;
        line-height: 0.95;
        letter-spacing: -0.05em;
        margin: 0 0 60px;
      }

      /* flow row */
      .agentic-flow {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 28px;
        flex-wrap: nowrap;
      }

      /* each step */
      .agentic-step {
        font-size: 42px;
        line-height: 1.1;
        color: rgba(255, 255, 255, 0.92);
        padding: 18px 24px;
        border-radius: 18px;
        background: rgba(0, 0, 0, 0.28);
        border: 1px solid rgba(255, 255, 255, 0.08);
        box-shadow: 0 14px 40px rgba(0, 0, 0, 0.28);
      }

      /* emphasise your key steps */
      .agentic-step.inspect,
      .agentic-step.challenge {
        box-shadow:
          inset 0 0 0 1px rgba(180, 120, 255, 0.25),
          0 14px 40px rgba(0, 0, 0, 0.28);
      }

      /* arrows */
      .agentic-arrow {
        font-size: 42px;
        color: rgba(255, 255, 255, 0.5);
      }
    

      .demo-full {
        display: flex;
        align-items: center;
        justify-content: center;
        position: relative;
        overflow: hidden;
        background: #07080b;
      }

      .demo-full::before {
        content: "";
        position: absolute;
        inset: -10%;
        background: radial-gradient(circle at 50% 50%,
            rgba(110, 69, 188, 0.442),
            rgba(90, 40, 160, 0.18) 40%,
            rgba(40, 10, 80, 0.12) 70%,
            transparent 100%);
        filter: blur(50px);
        opacity: 0.75;
        pointer-events: none;
      }

      .demo-wrap {
        position: relative;
        z-index: 1;
        width: 1300px;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 40px;
      }

      .demo-title {
        font-size: 82px;
        line-height: 0.95;
        letter-spacing: -0.05em;
        margin: 0 0 24px;
      }

      .demo-sub {
        font-size: 28px;
        color: rgba(255, 255, 255, 0.7);
        margin-bottom: 36px;
      }

      .demo-list {
        list-style: none;
        margin: 0;
        padding: 0;
      }

      .demo-list li {
        font-size: 38px;
        line-height: 1.25;
        margin-bottom: 18px;
        color: #ffffff;
      }

      /* right side "system card" */
      .demo-card {
        border-radius: 28px;
        padding: 34px;
        background: rgba(0, 0, 0, 0.35);
        border: 1px solid rgba(255, 255, 255, 0.10);
        box-shadow: 0 20px 60px rgba(0, 0, 0, 0.32);

        display: flex;
        flex-direction: column;
        justify-content: center;
        gap: 16px;
      }

      .demo-card-item {
        font-size: 26px;
        color: rgba(255, 255, 255, 0.82);
        padding: 12px 0;
        border-top: 1px solid rgba(255, 255, 255, 0.08);
      }

      .demo-card-item:first-child {
        border-top: none;
      }

      .demo-footer {
        grid-column: 1 / -1;
        margin-top: 10px;
        font-size: 36px;
        font-weight: 700;
        text-align: center;
      }
    

      .dev-full {
        display: flex;
        align-items: center;
        justify-content: center;
        position: relative;
        overflow: hidden;
        background: #07080b;
      }

      .dev-full::before {
        content: "";
        position: absolute;
        inset: -10%;
        background: radial-gradient(circle at 50% 50%,
            rgba(168, 121, 255, 0.38),
            rgba(90, 40, 160, 0.16) 45%,
            rgba(40, 10, 80, 0.10) 75%,
            transparent 100%);
        filter: blur(50px);
        opacity: 0.7;
        pointer-events: none;
      }

      .dev-wrap {
        position: relative;
        z-index: 1;
        width: 1300px;
      }

      .dev-title {
        font-size: 88px;
        line-height: 0.95;
        letter-spacing: -0.05em;
        margin: 0 0 48px;
      }

      .dev-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 36px;
      }

      .dev-col {
        padding: 34px 36px;
        border-radius: 28px;
        background: rgba(0, 0, 0, 0.34);
        border: 1px solid rgba(255, 255, 255, 0.08);
        box-shadow: 0 20px 60px rgba(0, 0, 0, 0.32);
      }

      .dev-col.old {
        opacity: 0.65;
      }

      .dev-col.new {
        box-shadow:
          inset 0 0 0 1px rgba(180, 120, 255, 0.25),
          0 20px 60px rgba(0, 0, 0, 0.32);
      }

      .dev-heading {
        position: relative;
        font-size: 34px;
        margin-bottom: 20px;
        padding-bottom: 12px;
      }

      .dev-heading::after {
        content: "";
        position: absolute;
        left: 0;
        bottom: 0;
        width: 100%;
        height: 2px;
        background: rgba(255, 255, 255, 0.18);
      }

      .dev-list {
        list-style: none;
        margin: 0;
        padding: 0;
      }

      .dev-list li {
        font-size: 34px;
        line-height: 1.25;
        padding: 14px 0;
        border-top: 1px solid rgba(255, 255, 255, 0.08);
      }

      .dev-list li:first-child {
        border-top: none;
        padding-top: 0;
      }

      .dev-footer {
        margin-top: 42px;
        font-size: 40px;
        font-weight: 700;
        text-align: center;
      }

      .sec-col.new {
        box-shadow:
          inset 0 0 0 1px rgba(255, 140, 180, 0.25),
          0 20px 60px rgba(0, 0, 0, 0.32);
      }
    

      /* Act IV — Psychology background */
      .psych-bg {
        position: relative;
        overflow: hidden;
        background: #06070a;
      }

      .psych-bg::before {
        content: "";
        position: absolute;
        inset: -10%;

        background: radial-gradient(circle at 50% 50%,
            rgba(168, 121, 255, 0.28),
            rgba(90, 40, 160, 0.14) 45%,
            rgba(40, 10, 80, 0.10) 72%,
            transparent 100%);

        filter: blur(50px);
        opacity: 0.68;
        pointer-events: none;
        z-index: 0;
      }

      /* ensure content sits above glow */
      .psych-bg>* {
        position: relative;
        z-index: 1;
      }

      /* optional: soften empty right card */
      .psych-bg .mini-card:empty {
        background: rgba(255, 255, 255, 0.01);
      }

      .psych-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 18px;
        width: 100%;
        height: 100%;
        align-content: center;
      }

      .psych-tile {
        overflow: hidden;
        border-radius: 18px;
        background: rgba(255, 255, 255, 0.04);
        border: 1px solid rgba(255, 255, 255, 0.08);
        /* aspect-ratio: 1 / 1; */
        box-shadow: 0 12px 30px rgba(0, 0, 0, 0.22);
      }

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

      .backlash-image-wrap {
        display: flex;
        align-items: center;
        justify-content: center;
        height: 100%;
      }

      .backlash-image {
        width: 100%;
        max-width: 560px;
        border-radius: 20px;
        overflow: hidden;

        border: 1px solid rgba(255, 255, 255, 0.08);
        box-shadow: 0 14px 40px rgba(0, 0, 0, 0.28);

        display: block;

        /* subtle tone match */
        filter: contrast(1.05) brightness(0.95);
      }
    

      .close-full {
        display: flex;
        align-items: center;
        justify-content: center;
        position: relative;
        overflow: hidden;
        background: #050608;
      }

      .close-full::before {
        content: "";
        position: absolute;
        inset: -10%;
        background: radial-gradient(circle at 50% 50%,
            rgba(168, 121, 255, 0.16),
            rgba(90, 40, 160, 0.08) 45%,
            transparent 80%);
        filter: blur(50px);
        opacity: 0.6;
        pointer-events: none;
      }

      .close-wrap {
        position: relative;
        z-index: 1;

        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 40px;

        width: 1400px;
        align-items: center;
      }

      .close-tile {
        display: flex;
        align-items: center;
        justify-content: center;

        height: 720px;
        /* controls overall visual height */
      }

      .close-image {
        height: 100%;
        width: auto;
        object-fit: contain;

        border-radius: 24px;
        box-shadow: 0 24px 70px rgba(0, 0, 0, 0.35);
      }

      .close-caption {
        grid-column: 1 / -1;
        text-align: center;

        margin-top: 30px;

        font-size: 38px;
        line-height: 1.25;
        color: rgba(255, 255, 255, 0.92);

        letter-spacing: -0.01em;
      }
    

      .questions-overlay {
        display: flex;
        align-items: center;
        justify-content: center;
        background: transparent;
        box-shadow: none;
      }

      .questions-wrap {
        text-align: center;
        width: 100%;
      }

      .questions-mark {
        font-size: 120px;
        line-height: 1;
        font-weight: 800;
        letter-spacing: -0.05em;
        color: rgba(255, 255, 255, 0.9);
        text-shadow: 0 12px 40px rgba(0, 0, 0, 0.32);
        margin-bottom: 10px;
      }

      .questions-line {
        font-size: 34px;
        line-height: 1.2;
        color: rgba(255, 255, 255, 0.78);
        text-shadow: 0 8px 30px rgba(0, 0, 0, 0.28);
      }

      .questions-home {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 12px;
        margin-top: 34px;
        min-height: 54px;
        padding: 0 22px;
        border: 1px solid rgba(255, 255, 255, 0.2);
        border-radius: 999px;
        background: rgba(255, 255, 255, 0.08);
        color: rgba(255, 255, 255, 0.92);
        font-size: 22px;
        font-weight: 700;
        text-decoration: none;
        box-shadow: 0 16px 44px rgba(0, 0, 0, 0.24);
      }

      .questions-home span {
        font-size: 25px;
        line-height: 1;
      }

      .questions-home:hover,
      .questions-home:focus-visible {
        background: rgba(255, 255, 255, 0.14);
        border-color: rgba(255, 255, 255, 0.34);
        outline: none;
      }

      .talk-controls {
        position: fixed;
        left: 50%;
        bottom: 22px;
        z-index: 9999;
        display: flex;
        gap: 14px;
        transform: translateX(-50%);
        pointer-events: auto;
      }

      .talk-control {
        width: 58px;
        height: 58px;
        border: 1px solid rgba(255, 255, 255, 0.18);
        border-radius: 999px;
        background: rgba(6, 8, 14, 0.72);
        color: rgba(255, 255, 255, 0.9);
        font: inherit;
        font-size: 38px;
        font-weight: 700;
        line-height: 1;
        cursor: pointer;
        backdrop-filter: blur(14px);
        box-shadow: 0 14px 42px rgba(0, 0, 0, 0.32);
      }

      .talk-control:hover,
      .talk-control:focus-visible {
        background: rgba(255, 255, 255, 0.14);
        border-color: rgba(255, 255, 255, 0.34);
        outline: none;
      }

      body.show-all-steps .step {
        opacity: 1;
        visibility: visible;
        pointer-events: none;
      }

      body.show-all-steps .step.active {
        pointer-events: auto;
      }