* { box-sizing: border-box; }
  html, body { height: 100%; }
  body {
    margin: 0;
    background: #0E1013;
    display: grid;
    place-items: center;
    padding: 0;
    box-sizing: border-box;
    height: 100vh;
    overflow: hidden;
  }
  canvas {
    display: block;
    width: auto;
    height: auto;
    max-width: 100%;
    max-height: 100%;
    image-rendering: pixelated;
    outline: none;
    cursor: none;
  }
  #website-mode,
  .surface-section,
  #surface-composite,
  #surface-display-slot { display: contents; }
  .website-intro,
  .surface-placeholder,
  .surface-photo,
  .surface-reflection,
  .surface-pending { display: none; }
  #view-mode-toggle {
    position: fixed;
    top: 16px;
    right: 16px;
    z-index: 100;
    display: inline-flex;
    align-items: center;
    gap: 9px;
    min-height: 34px;
    padding: 0 13px;
    border: 1px solid rgba(117, 126, 140, 0.58);
    background: rgba(8, 9, 11, 0.88);
    color: #A9B1BD;
    font: 11px/1 Consolas, "Courier New", monospace;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    cursor: pointer;
    backdrop-filter: blur(12px);
  }
  #view-mode-toggle:hover,
  #view-mode-toggle:focus-visible {
    border-color: #4897F2;
    color: #EEF1F5;
    outline: none;
  }
  .view-mode-toggle__dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #4897F2;
    box-shadow: 0 0 12px rgba(72, 151, 242, 0.75);
  }
  .lab-chrome-hidden #view-mode-toggle { display: none; }
  #lab-hud {
    position: fixed;
    top: 14px;
    right: 14px;
    z-index: 20;
    display: none;
    min-width: 310px;
    padding: 12px 14px;
    border: 1px solid #3E434C;
    background: rgba(8, 9, 11, 0.94);
    color: #A9B1BD;
    font: 12px/1.45 Consolas, "Courier New", monospace;
    white-space: pre-line;
    pointer-events: none;
  }
  #lab-hud.visible { display: block; }
  #lab-hud[data-mode="proposal"] {
    border-color: #DEA447;
    color: #EEF1F5;
  }
  #lab-selftest { display: none; }
  #lab-catalog {
    position: fixed;
    inset: 18px auto 18px 18px;
    z-index: 30;
    width: min(430px, calc(100vw - 36px));
    overflow: auto;
    padding: 14px;
    border: 1px solid #4897F2;
    background: rgba(8, 9, 11, 0.97);
    color: #EEF1F5;
    font: 12px/1.35 Consolas, "Courier New", monospace;
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.55);
  }
  #lab-catalog[hidden] { display: none; }
  #lab-catalog header { position: sticky; top: -14px; margin: -14px -14px 12px; padding: 12px 14px; background: #11141A; border-bottom: 1px solid #3E434C; }
  #lab-catalog h2 { margin: 0 0 4px; color: #63A7FF; font-size: 14px; }
  #lab-catalog p { margin: 0; color: #A9B1BD; }
  #lab-catalog h3 { margin: 14px 0 6px; color: #DEA447; font-size: 12px; text-transform: uppercase; }
  #lab-catalog button {
    display: block;
    width: 100%;
    margin: 0 0 5px;
    padding: 8px 10px;
    border: 1px solid #3E434C;
    background: #1D2026;
    color: #EEF1F5;
    font: inherit;
    text-align: left;
    cursor: pointer;
  }
  #lab-catalog button:hover, #lab-catalog button[aria-current="true"] { border-color: #4897F2; background: #272B33; }
  #lab-catalog button small { display: block; margin-top: 3px; color: #757E8C; }

  body[data-shell-mode="website"] {
    display: block;
    min-height: 100vh;
    height: auto;
    overflow: auto;
    padding: 0;
    background:
      radial-gradient(circle at 76% 12%, rgba(72, 151, 242, 0.09), transparent 30rem),
      radial-gradient(circle at 18% 38%, rgba(84, 187, 125, 0.055), transparent 34rem),
      #08090B;
    color: #EEF1F5;
  }
  body[data-shell-mode="website"] #website-mode {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    width: 100%;
    margin: 0 auto;
    padding: 0 0 clamp(70px, 8vw, 120px);
  }
  body[data-shell-mode="website"] .website-intro {
    position: relative;
    display: grid;
    grid-area: 1 / 1;
    align-self: start;
    z-index: 3;
    width: min(2200px, 100%);
    margin: 0 auto;
    padding: 20px clamp(20px, 4vw, 64px) 0;
    justify-items: center;
    text-align: center;
  }
  .website-kicker {
    margin: 0 0 18px;
    color: #7CB3F5;
    font: 12px/1.2 Consolas, "Courier New", monospace;
    letter-spacing: 0.22em;
    text-transform: uppercase;
  }
  .website-intro h1 {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    column-gap: 0.22em;
    width: min(2000px, 100%);
    margin: 0;
    color: #F4F7FA;
    font: 500 clamp(34px, 4.3vw, 72px)/1.02 Inter, "Segoe UI", sans-serif;
    letter-spacing: -0.045em;
    text-shadow: 0 3px 32px rgba(0, 0, 0, 0.88);
  }
  .website-intro h1 span {
    display: inline-block;
    white-space: nowrap;
  }
  .website-lead {
    max-width: 840px;
    margin: 28px 0 0;
    color: #A9B1BD;
    font: 400 clamp(17px, 1.65vw, 23px)/1.55 Inter, "Segoe UI", sans-serif;
    text-shadow: 0 2px 18px rgba(0, 0, 0, 0.9);
  }
  .website-facts {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    margin: 28px 0 0;
    padding: 0;
    list-style: none;
  }
  .website-facts li {
    margin: 0;
  }
  .website-facts button {
    padding: 8px 12px;
    border: 1px solid rgba(117, 126, 140, 0.36);
    color: #A9B1BD;
    background: rgba(29, 32, 38, 0.58);
    font: 10px/1 Consolas, "Courier New", monospace;
    letter-spacing: 0.09em;
    text-transform: uppercase;
    white-space: nowrap;
    cursor: pointer;
    transition: border-color 120ms ease, background 120ms ease, color 120ms ease, transform 80ms ease;
  }
  .website-facts button:hover,
  .website-facts button:focus-visible,
  .website-facts button[data-active="true"] {
    border-color: rgba(72, 151, 242, 0.82);
    background: rgba(36, 62, 91, 0.7);
    color: #EEF1F5;
    outline: none;
  }
  .website-facts button:active {
    transform: translateY(1px);
  }
  .website-action-status {
    position: absolute;
    top: calc(100% + 13px);
    left: 50%;
    z-index: 4;
    width: max-content;
    max-width: calc(100vw - 32px);
    margin: 0;
    padding: 6px 9px;
    border: 1px solid rgba(72, 151, 242, 0.32);
    background: rgba(8, 9, 11, 0.82);
    color: #A9B1BD;
    font: 9px/1.3 Consolas, "Courier New", monospace;
    letter-spacing: 0.05em;
    text-align: center;
    opacity: 0;
    transform: translate(-50%, -3px);
    transition: opacity 140ms ease, transform 140ms ease;
    pointer-events: none;
  }
  .website-action-status[data-visible="true"] {
    opacity: 1;
    transform: translate(-50%, 0);
  }
  body[data-shell-mode="website"] .surface-section {
    position: relative;
    display: block;
    grid-area: 1 / 1;
    z-index: 1;
    width: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden;
  }
  body[data-shell-mode="website"] .surface-section::before {
    content: none;
  }
  body[data-shell-mode="website"] .surface-section::after {
    content: "";
    position: absolute;
    top: 0;
    right: 0;
    left: 0;
    z-index: 2;
    height: var(--intro-fade-height, 680px);
    background: linear-gradient(
      180deg,
      #08090B 0%,
      rgba(8, 9, 11, 0.97) 18%,
      rgba(8, 9, 11, 0.9) 42%,
      rgba(8, 9, 11, 0.78) calc(100% - 100px),
      transparent 100%
    );
    pointer-events: none;
  }
  body[data-shell-mode="website"] #surface-composite {
    --surface-aspect: 16 / 10;
    --display-left: 17.5%;
    --display-top: 18%;
    --display-width: 65%;
    --display-height: 58.5%;
    --display-radius: 1.5%;
    position: relative;
    display: block;
    z-index: 1;
    /* Rund 2x Zoom bis der Displayausschnitt seine native 1920px-Breite
       erreicht. Auf noch breiteren Viewports bleibt das Foto mindestens
       bildfuellend, waehrend die Canvas selbst bei Full HD stoppt. */
    width: var(--surface-responsive-width, max(100vw, min(170vw, 4021.5272727273px)));
    max-width: none;
    aspect-ratio: var(--surface-aspect);
    margin: var(--surface-offset-y, 0px) 0 0 50%;
    transform: translateX(calc(-50% + var(--surface-offset-x, 0px)));
    isolation: isolate;
    box-shadow: 0 54px 130px rgba(0, 0, 0, 0.48);
  }
  body[data-shell-mode="website"] .surface-photo {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: fill;
    display: block;
    z-index: 1;
    pointer-events: none;
  }
  body[data-shell-mode="website"] .surface-reflection {
    position: absolute;
    left: var(--reflection-left);
    top: var(--reflection-top);
    width: var(--reflection-width);
    height: var(--reflection-height);
    object-fit: fill;
    display: block;
    z-index: 3;
    pointer-events: none;
    mix-blend-mode: screen;
    opacity: 0.72;
  }
  body[data-shell-mode="website"] .surface-photo[hidden],
  body[data-shell-mode="website"] .surface-reflection[hidden] { display: none; }
  body[data-shell-mode="website"] .surface-placeholder {
    position: absolute;
    inset: 0;
    z-index: 1;
    display: grid;
    place-items: end center;
    padding: 0 0 6%;
    border: 1px solid rgba(117, 126, 140, 0.3);
    border-radius: 4.5% 4.5% 8% 8%;
    background:
      linear-gradient(145deg, rgba(255, 255, 255, 0.035), transparent 30%),
      linear-gradient(180deg, #1A1D22 0%, #111318 76%, #0D0F12 100%);
    box-shadow: 0 40px 100px rgba(0, 0, 0, 0.48), inset 0 1px rgba(255, 255, 255, 0.05);
  }
  body[data-shell-mode="website"] #surface-composite[data-assets-ready="true"] .surface-placeholder,
  body[data-shell-mode="website"] #surface-composite[data-assets-ready="true"] .surface-pending { display: none; }
  body[data-shell-mode="website"] #surface-composite[data-assets-ready="true"] #surface-display-slot { z-index: 2; }
  .surface-placeholder span {
    color: #454D5A;
    font: 10px/1 Consolas, "Courier New", monospace;
    letter-spacing: 0.16em;
    text-transform: uppercase;
  }
  body[data-shell-mode="website"] #surface-display-slot {
    position: absolute;
    left: var(--display-left);
    top: var(--display-top);
    z-index: 2;
    display: grid;
    place-items: center;
    width: var(--display-width);
    height: var(--display-height);
    overflow: hidden;
    border-radius: var(--display-radius);
    background: #050608;
    box-shadow: 0 0 0 1px rgba(117, 126, 140, 0.36), 0 0 42px rgba(72, 151, 242, 0.08);
  }
  body[data-shell-mode="website"] #surface-display-slot canvas {
    display: block;
    width: min(100%, 1920px);
    height: auto;
    aspect-ratio: 16 / 9;
    max-width: none;
    max-height: none;
  }
  body[data-shell-mode="website"] .surface-pending {
    position: absolute;
    left: 50%;
    bottom: 1.8%;
    z-index: 4;
    display: block;
    width: max-content;
    max-width: 80%;
    margin: 0;
    transform: translateX(-50%);
    color: #757E8C;
    font: 10px/1.3 Consolas, "Courier New", monospace;
    letter-spacing: 0.06em;
    text-align: center;
  }
  body[data-shell-mode="website"] #lab-hud { display: none; }
  body[data-shell-mode="website"] #view-mode-toggle {
    border-color: rgba(72, 151, 242, 0.52);
    background: rgba(8, 9, 11, 0.72);
  }

  @media (max-width: 700px) {
    #view-mode-toggle { top: 10px; right: 10px; }
    body[data-shell-mode="website"] #website-mode { padding-inline: 14px; }
    body[data-shell-mode="website"] .website-intro {
      padding-top: 16px;
      padding-inline: 14px;
    }
    .website-kicker { margin-bottom: 12px; }
    .website-intro h1 { font-size: clamp(18px, 6.4vw, 42px); line-height: 1.04; }
    .website-lead { margin-top: 18px; font-size: clamp(14px, 3.8vw, 17px); line-height: 1.45; }
    .website-facts { margin-top: 18px; gap: 6px; }
    .website-facts button { padding: 7px 9px; font-size: 9px; }
    .website-action-status { top: calc(100% + 9px); font-size: 8px; }
    body[data-shell-mode="website"] .surface-pending { font-size: 8px; }
  }