:root {
      --blue: #00b4fa;
      --sand: #e7d7b6;
      --bg-dark: #10151b;
      --card-bg: #192332e6;
      --glow: 0 0 24px #00b4fa55, 0 2px 32px #00b4fa33;
      --shine-grad: linear-gradient(90deg, #fff 8%, #00b4fa 60%, #23e6ff 98%);
    }
    body {
      margin: 0;
      padding: 0;
      font-family: 'Share Tech Mono', monospace;
      background: var(--bg-dark);
      color: var(--sand);
      min-height: 100vh;
      overflow-x: hidden;
    }
    .heka-status-line {
      background: linear-gradient(90deg,#161d29 60%,#202b3e 100%);
      border: 2px solid #00b4fa;
      border-radius: 16px;
      max-width: 780px;
      margin: 38px auto 28px auto;
      padding: 17px 32px;
      color: #fff;
      box-shadow: var(--glow);
      text-align: center;
      font-size: 1.15em;
      font-weight: bold;
      letter-spacing: 0.7px;
      display: flex;
      align-items: center;
      gap: 16px;
      position: relative;
    }
    .heka-status-line i {
      color: #00b4fa;
      font-size: 2em;
      margin-right: 10px;
      filter: drop-shadow(0 2px 12px #00b4fa99);
    }
    .main-flex {
      max-width: 1300px;
      margin: 0 auto;
      display: flex;
      align-items: flex-start;
      justify-content: space-between;
      padding: 22px 4vw 50px 4vw;
      gap: 54px;
    }
    .main-content { flex: 2; min-width: 320px; max-width: 760px; }

    /* IMAGE STACK EFFECT WITH EVEN BIGGER GAP */
    .image-stack {
      flex: 1;
      min-width: 370px;
      max-width: 460px;
      display: flex;
      flex-direction: column;
      gap: 0;
      position: relative;
      margin-top: 16px;
    }
    .image-layer {
      position: relative;
      height: 240vh;           /* much taller! */
      margin-bottom: -170vh;   /* even bigger overlap */
      z-index: 1;
      pointer-events: none;
    }
    .image-layer:last-child { margin-bottom: 0; }
    .image-stack img {
      position: sticky;
      top: 12vh;
      width: 100%;
      height: 100vh;
      object-fit: cover;
      border-radius: 32px;
      box-shadow: var(--glow);
      border: 2.5px solid #00b4fa55;
      background: #10151b;
      z-index: 2;
      transition: box-shadow 0.34s, filter 0.34s;
      filter: grayscale(0.08) brightness(0.97);
      background-blend-mode: multiply;
    }
    .image-stack img.active {
      box-shadow: 0 18px 48px #00b4fa88, 0 1px 32px #00b4fa33;
      filter: grayscale(0) brightness(1.07);
      z-index: 10;
    }

    /* Responsive */
    @media (max-width: 1100px) {
      .main-flex { flex-direction: column-reverse; gap: 18px; }
      .image-stack { min-width: 97vw; max-width: 100vw;}
      .image-stack img { height: 52vw; min-height: 140px; }
      .image-layer { height: 200vw; margin-bottom: -140vw; }
    }
    @media (max-width: 700px) {
      .main-flex { padding: 4vw 1vw 28px 1vw; }
      .image-stack img { height: 36vw; min-height: 90px;}
      .image-layer { height: 150vw; margin-bottom: -75vw;}
    }

    /* Other content styling */
    .highlight-block {
      background: var(--card-bg);
      border-radius: 19px;
      box-shadow: var(--glow);
      border: 2.2px solid #00b4fa66;
      padding: 34px 27px 24px 27px;
      margin-bottom: 36px;
      font-size: 1.15em;
      color: #fff;
      font-weight: bold;
      line-height: 1.6;
      position: relative;
    }
    .hero-title {
      font-size: 2.25rem;
      font-weight: bold;
      background: var(--shine-grad);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      letter-spacing: 1.3px;
      text-shadow: 0 2px 18px #22213866, 0 0 8px #00b4fa88;
      text-align: center;
      margin-bottom: 14px;
      text-transform: uppercase;
    }
    .section-title {
      font-size: 1.45rem;
      font-weight: bold;
      background: var(--shine-grad);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      letter-spacing: 1.1px;
      text-align: center;
      margin-bottom: 18px;
      text-transform: uppercase;
    }
    .features-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 28px;
      margin-bottom: 35px;
    }
    .feature-card {
      background: #222b36e9;
      border-radius: 13px;
      box-shadow: 0 4px 20px #00b4fa22;
      border: 1.6px solid #00b4fa44;
      padding: 24px 18px 18px 18px;
      color: #fff;
      font-weight: bold;
      font-size: 1.07em;
      display: flex;
      align-items: flex-start;
      gap: 12px;
      min-height: 110px;
    }
    .feature-card i {
      font-size: 1.53em;
      color: #00b4fa;
      margin-top: 4px;
      filter: drop-shadow(0 2px 8px #00b4fa44);
      flex-shrink: 0;
    }
    .feature-card strong {
      color: #00b4fa;
      display: block;
      margin-bottom: 2px;
      font-size: 1.06em;
    }
    .center-btn-row {
      text-align: center;
      margin-top: 36px;
    }
    .buy-btn {
      background: linear-gradient(90deg, #00b4fa 10%, #00ffd0 90%);
      color: #181a1b;
      font-family: 'Share Tech Mono', monospace;
      border: none;
      border-radius: 16px;
      padding: 16px 46px;
      font-size: 1.18em;
      font-weight: bold;
      cursor: pointer;
      box-shadow: 0 6px 32px #00b4fa22;
      transition: background .18s, color .17s, transform .13s;
      letter-spacing: 1px;
      margin-top: 0;
      outline: none;
      display: inline-block;
    }
    .buy-btn:hover {
      background: #e7d7b6;
      color: #002a37;
      transform: scale(1.045);
    }
    .why-callout {
      margin: 30px 0 0 0;
      font-size: 1.15em;
      text-align: center;
      background: var(--shine-grad);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      font-weight: bold;
      letter-spacing: .7px;
      min-height: 1.5em;
    }
    .back-link-bottom {
      display: inline-block;
      margin: 38px auto 18px auto;
      color: #fff;
      background: linear-gradient(90deg,#161d29 60%,#202b3e 100%);
      border: 2.2px solid #00b4fa;
      border-radius: 16px;
      font-size: 1.12em;
      font-family: 'Share Tech Mono', monospace;
      font-weight: bold;
      text-decoration: none;
      padding: 12px 36px;
      box-shadow: 0 2px 15px #00b4fa33;
      transition: background .16s, color .13s, border .19s;
      letter-spacing: 1.1px;
      min-width: 150px;
    }
    .back-link-bottom i {
      margin-right: 7px;
      font-size: 1.09em;
    }
    .back-link-bottom:hover {
      background: #e7d7b6;
      color: #003a5c;
      text-decoration: underline;
      border-color: #e7d7b6;
    }
    .chatbox {
      background: #161d29;
      border: 2px solid #00b4fa;
      border-radius: 20px;
      box-shadow: var(--glow);
      padding: 22px 18px 18px 18px;
      margin: 36px auto 0 auto;
      max-width: 430px;
      min-width: 180px;
      color: #fff;
      font-family: 'Share Tech Mono', monospace;
      font-size: 1.08em;
      position: relative;
      z-index: 3;
    }
    .chatbox-title {
      color: #00b4fa;
      font-weight: bold;
      font-size: 1.21em;
      margin-bottom: 7px;
      letter-spacing: 1px;
      text-align: center;
      text-transform: uppercase;
      background: var(--shine-grad);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .chatbox-messages {
      min-height: 66px;
      max-height: 188px;
      overflow-y: auto;
      margin-bottom: 12px;
      padding: 5px 1px;
      font-size: 0.98em;
      color: #e7d7b6;
    }
    .chatbox-input-row {
      display: flex;
      gap: 7px;
      align-items: center;
      margin-top: 5px;
    }
    .chatbox-input-row input {
      flex: 1;
      border-radius: 9px;
      border: 1.5px solid #00b4fa;
      padding: 8px 11px;
      font-size: 1em;
      background: #10151b;
      color: #fff;
      font-family: 'Share Tech Mono', monospace;
      outline: none;
    }
    .chatbox-input-row button {
      border: none;
      background: linear-gradient(90deg, #00b4fa 10%, #00ffd0 90%);
      color: #181a1b;
      border-radius: 9px;
      padding: 8px 19px;
      font-size: 1.05em;
      font-weight: bold;
      cursor: pointer;
      transition: background .13s, color .13s;
    }
    .chatbox-input-row button:hover {
      background: #e7d7b6; color: #002a37;
    }