html,body { margin:0; padding:0; background:#000; color:#cdf6ff; height:100%;
              font-family: 'SF Mono', 'Menlo', 'Consolas', monospace; overflow:hidden; }
  #app { position:fixed; inset:0; }
  .sr-only {
    position: fixed;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }
  canvas {
    display:block;
    cursor: none;
    touch-action: none;
  }
  #tron-disc-cursor {
    position: fixed;
    left: 0;
    top: 0;
    z-index: 80;
    width: 33px;
    height: 33px;
    pointer-events: none;
    opacity: 0;
    visibility: hidden;
    transform: translate3d(-100px, -100px, 0) translate(-50%, -50%) rotate(0deg);
    transition: none;
    will-change: transform, opacity;
    contain: layout paint style;
  }
  #tron-disc-cursor::before,
  #tron-disc-cursor::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: 50%;
  }
  #tron-disc-cursor::before {
    background:
      radial-gradient(circle at 50% 50%, transparent 0 29%, rgba(0, 15, 18, 0.96) 30% 45%, transparent 46%),
      conic-gradient(from 0deg,
        rgba(97, 247, 255, 0.98) 0deg 32deg,
        rgba(97, 247, 255, 0.20) 32deg 54deg,
        transparent 54deg 93deg,
        rgba(210, 255, 255, 0.98) 93deg 102deg,
        transparent 102deg 181deg,
        rgba(97, 247, 255, 0.98) 181deg 213deg,
        rgba(97, 247, 255, 0.18) 213deg 236deg,
        transparent 236deg 292deg,
        rgba(210, 255, 255, 0.98) 292deg 302deg,
        transparent 302deg 360deg);
    -webkit-mask: radial-gradient(circle, transparent 0 34%, #000 35% 57%, transparent 58%);
    mask: radial-gradient(circle, transparent 0 34%, #000 35% 57%, transparent 58%);
    filter: drop-shadow(0 0 5px rgba(70, 244, 255, 0.95)) drop-shadow(0 0 11px rgba(33, 205, 224, 0.62));
  }
  #tron-disc-cursor::after {
    inset: 6px;
    border: 1.4px solid rgba(62, 246, 255, 0.92);
    border-left-color: rgba(62, 246, 255, 0.14);
    border-bottom-color: rgba(62, 246, 255, 0.28);
    box-shadow:
      0 0 5px rgba(70, 244, 255, 0.9),
      inset 0 0 6px rgba(70, 244, 255, 0.56);
  }
  #tron-disc-cursor .disc-core {
    position: absolute;
    inset: 12.5px;
    border-radius: 50%;
    border: 1px solid rgba(218, 255, 255, 0.94);
    box-shadow: 0 0 5px rgba(76, 245, 255, 0.9);
  }
  #tron-disc-cursor .disc-wait-ring {
    position: absolute;
    inset: -9px;
    opacity: 0;
    pointer-events: none;
    animation: tron-disc-wait-orbit 0.82s linear infinite;
    animation-play-state: paused;
    transition: none;
    filter:
      drop-shadow(0 0 5px rgba(70, 244, 255, 0.88))
      drop-shadow(0 0 13px rgba(33, 205, 224, 0.44));
  }
  #tron-disc-cursor .disc-wait-notch {
    position: absolute;
    left: 50%;
    top: 0;
    width: 3px;
    height: 11px;
    border-radius: 3px;
    background: linear-gradient(180deg, rgba(226, 255, 255, 0.98), rgba(70, 244, 255, 0.26));
    box-shadow:
      0 0 5px rgba(70, 244, 255, 0.88),
      0 0 11px rgba(33, 205, 224, 0.5);
    transform: translateX(-50%) rotate(0deg);
    transform-origin: 50% 26px;
  }
  #tron-disc-cursor .disc-wait-notch:nth-child(2) {
    transform: translateX(-50%) rotate(120deg);
  }
  #tron-disc-cursor .disc-wait-notch:nth-child(3) {
    transform: translateX(-50%) rotate(240deg);
  }
  #tron-disc-cursor.is-reveal-waiting .disc-wait-ring {
    opacity: 1;
    animation-play-state: running;
  }
  #tron-reveal-wait-label {
    position: fixed;
    right: max(72px, env(safe-area-inset-right));
    bottom: max(42px, env(safe-area-inset-bottom));
    z-index: 81;
    display: inline-flex;
    align-items: baseline;
    justify-content: flex-end;
    gap: 0.04em;
    pointer-events: none;
    opacity: 0;
    color: oklch(92% 0.11 205);
    font-family: 'SF Mono', 'Menlo', 'Consolas', monospace;
    font-size: clamp(24px, 2.2vw, 30px);
    font-weight: 800;
    line-height: 1;
    letter-spacing: 0.1em;
    text-align: right;
    text-transform: none;
    text-shadow:
      0 0 5px rgba(70, 244, 255, 0.78),
      0 0 16px rgba(33, 205, 224, 0.38);
    transform: translateZ(0);
    transition: none;
  }
  .tron-wait-dots {
    display: inline-flex;
    justify-content: space-between;
    width: 0.88em;
    margin-left: 0.02em;
    letter-spacing: 0;
  }
  .tron-wait-dot {
    display: inline-block;
    opacity: 0.28;
    transform: translateY(0);
  }
  #tron-reveal-wait-label.is-active .tron-wait-dot {
    animation: tron-wait-dot-scan 0.84s cubic-bezier(0.16, 1, 0.3, 1) infinite;
  }
  #tron-reveal-wait-label .tron-wait-dot:nth-child(1) {
    animation-delay: 0s;
  }
  #tron-reveal-wait-label .tron-wait-dot:nth-child(2) {
    animation-delay: 0.16s;
  }
  #tron-reveal-wait-label .tron-wait-dot:nth-child(3) {
    animation-delay: 0.32s;
  }
  #tron-reveal-wait-label.is-active {
    opacity: 1;
    animation: tron-reveal-wait-label-pulse 0.92s cubic-bezier(0.16, 1, 0.3, 1) infinite;
  }
  @keyframes tron-reveal-wait-label-pulse {
    0%, 100% {
      opacity: 0.54;
      text-shadow:
        0 0 4px rgba(70, 244, 255, 0.55),
        0 0 12px rgba(33, 205, 224, 0.22);
    }
    50% {
      opacity: 1;
      text-shadow:
        0 0 7px rgba(226, 255, 255, 0.82),
        0 0 18px rgba(70, 244, 255, 0.72),
        0 0 34px rgba(33, 205, 224, 0.42);
    }
  }
  @keyframes tron-disc-wait-orbit {
    to {
      transform: rotate(360deg);
    }
  }
  @keyframes tron-wait-dot-scan {
    0%, 100% {
      opacity: 0.28;
      text-shadow: 0 0 4px rgba(70, 244, 255, 0.3);
      transform: translateY(0);
    }
    38% {
      opacity: 1;
      text-shadow:
        0 0 6px rgba(226, 255, 255, 0.88),
        0 0 16px rgba(70, 244, 255, 0.72);
      transform: translateY(-0.14em);
    }
    62% {
      opacity: 0.44;
      text-shadow: 0 0 7px rgba(70, 244, 255, 0.42);
      transform: translateY(0);
    }
  }
  body.tron-disc-cursor-visible #tron-disc-cursor {
    opacity: 1;
    visibility: visible;
  }
  body.mouse-look-engaged #tron-disc-cursor,
  #tron-disc-cursor.is-hidden {
    opacity: 0 !important;
    visibility: hidden !important;
  }
  #contact-terminal-action,
  #contact-terminal-back {
    position: fixed;
    z-index: 90;
    box-sizing: border-box;
    border: 1px solid oklch(84% 0.14 202 / 0.84);
    border-radius: 6px;
    background: oklch(12% 0.028 215 / 0.94);
    color: oklch(94% 0.045 205);
    font-family: 'SF Mono', 'Menlo', 'Consolas', monospace;
    font-weight: 800;
    letter-spacing: 0;
    box-shadow: 0 0 18px oklch(80% 0.14 202 / 0.24), inset 0 0 14px oklch(80% 0.14 202 / 0.08);
    cursor: pointer;
    transition: background-color 150ms cubic-bezier(0.16, 1, 0.3, 1), border-color 150ms cubic-bezier(0.16, 1, 0.3, 1), opacity 150ms cubic-bezier(0.16, 1, 0.3, 1);
  }
  #contact-terminal-action[hidden],
  #contact-terminal-back[hidden] {
    display: none !important;
  }
  #contact-terminal-action {
    left: 50%;
    bottom: max(28px, env(safe-area-inset-bottom));
    min-width: 188px;
    min-height: 44px;
    padding: 10px 16px;
    transform: translateX(-50%);
    font-size: 13px;
  }
  .contact-terminal-key {
    margin-right: 8px;
    color: oklch(82% 0.17 78);
  }
  #contact-terminal-back {
    top: max(18px, env(safe-area-inset-top));
    left: max(18px, env(safe-area-inset-left));
    width: 44px;
    height: 44px;
    padding: 0;
    font-family: system-ui, sans-serif;
    font-size: 25px;
    line-height: 1;
  }
  #contact-terminal-action:hover,
  #contact-terminal-back:hover {
    border-color: oklch(84% 0.17 78);
    background: oklch(19% 0.045 78 / 0.96);
  }
  #contact-terminal-action:focus-visible,
  #contact-terminal-back:focus-visible {
    outline: 3px solid oklch(82% 0.17 78);
    outline-offset: 3px;
  }
  body.contact-terminal-focus #mobile-movement-pad,
  body.contact-terminal-focus .splat-input-overlay,
  body.contact-terminal-focus #hud-tl,
  body.contact-terminal-focus #settings-toggle,
  body.contact-terminal-focus #hud-controls,
  body.contact-terminal-focus #tron-disc-cursor {
    opacity: 0 !important;
    visibility: hidden !important;
    pointer-events: none !important;
  }
  body.contact-terminal-focus #app canvas {
    cursor: pointer;
  }
  @media (hover: none), (pointer: coarse) {
    #contact-terminal-action {
      left: auto;
      right: max(18px, env(safe-area-inset-right));
      bottom: max(18px, env(safe-area-inset-bottom));
      min-width: 154px;
      min-height: 48px;
      padding: 11px 15px;
      transform: none;
      font-size: 12px;
    }
    #contact-terminal-action .contact-terminal-key {
      display: none;
    }
    #contact-terminal-back {
      top: max(12px, env(safe-area-inset-top));
      left: max(12px, env(safe-area-inset-left));
      width: 48px;
      height: 48px;
    }
  }
  @media (prefers-reduced-motion: reduce) {
    #contact-terminal-action,
    #contact-terminal-back {
      transition: none;
    }
  }
  @media (hover: none), (pointer: coarse) {
    #tron-disc-cursor { display: none; }
    canvas { cursor: auto; }
  }
  /* Il pannello dei valori di performance e' uno strumento di lavoro, non parte della
     demo: resta spento salvo che l'URL abbia ?osd (2026-09-18). La classe la mette lo
     script in index.html prima del primo frame, cosi' non lampeggia all'apertura. */
  #hud-tl { display: none; }
  body.osd-on #hud-tl { display: block; }

  .hud {
    position:fixed; pointer-events:none;
    background: rgba(2,9,11,0.55);
    border:1px solid rgba(98,247,255,0.35);
    color:#cdf6ff;
    padding:10px 14px;
    font-size:11px;
    line-height:1.55;
    letter-spacing:0.04em;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
    font-variant-numeric: tabular-nums;
    contain: layout paint;
    text-shadow: 0 0 6px rgba(98,247,255,0.35);
    max-width: 380px;
  }
  .perf-live-overlay {
    display: grid;
    gap: 2px;
    width: min(258px, calc(100vw - 54px));
  }
  .perf-live-row {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    white-space: nowrap;
  }
  .perf-live-row span:first-child {
    color: rgba(183, 239, 246, 0.72);
  }
  .perf-live-row strong,
  .perf-live-value {
    color: #f2feff;
    font-weight: 600;
    text-align: right;
  }
  .perf-live-primary strong {
    color: #5ff8ff;
    text-shadow: 0 0 8px rgba(95, 248, 255, 0.75);
  }
  .perf-live-muted .perf-live-value {
    color: rgba(205, 246, 255, 0.66);
  }
  .perf-live-warn .perf-live-value {
    color: #ffd36a;
  }
  .perf-live-bad .perf-live-value {
    color: #ff6e8f;
  }
  .perf-live-spike .perf-live-value {
    max-width: 176px;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .tech-breakdown-overlay {
    position: fixed;
    top: 14px;
    right: 14px;
    z-index: 82;
    width: min(340px, calc(100vw - 28px));
    box-sizing: border-box;
    pointer-events: none;
    background: rgba(2, 9, 11, 0.72);
    border: 1px solid rgba(98, 247, 255, 0.35);
    color: #cdf6ff;
    padding: 12px 14px;
    font-size: 11px;
    line-height: 1.45;
    letter-spacing: 0.02em;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
    font-variant-numeric: tabular-nums;
    contain: layout paint;
    text-shadow: 0 0 6px rgba(98, 247, 255, 0.25);
  }
  .tech-breakdown-title {
    margin: 0 0 8px;
    color: #f2feff;
    font-weight: 700;
    text-transform: uppercase;
  }
  .tech-breakdown-overlay dl {
    display: grid;
    gap: 4px;
    margin: 0;
  }
  .tech-breakdown-overlay dl > div {
    display: grid;
    grid-template-columns: 74px minmax(0, 1fr);
    gap: 10px;
    min-width: 0;
  }
  .tech-breakdown-overlay dt {
    color: rgba(183, 239, 246, 0.72);
  }
  .tech-breakdown-overlay dd {
    min-width: 0;
    margin: 0;
    overflow: hidden;
    color: #f2feff;
    text-align: right;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  @media (max-width: 760px), (hover: none), (pointer: coarse) {
    .hud {
      padding: 8px 10px;
      font-size: 10px;
      line-height: 1.45;
      max-width: calc(100vw - 24px);
    }
    /* No perf/FPS counter on mobile (production). */
    #hud-tl {
      display: none !important;
    }
    .perf-live-overlay {
      width: min(220px, calc(100vw - 44px));
    }
    #hud-tl .perf-live-overlay {
      display: inline-grid;
      width: max-content;
      min-width: 0;
      gap: 0;
    }
    #hud-tl > :not(.perf-live-overlay) {
      display: none !important;
    }
    #hud-tl .perf-live-row:not(.perf-live-primary) {
      display: none;
    }
    #hud-tl .perf-live-primary {
      display: flex;
      align-items: baseline;
      justify-content: flex-start;
      width: max-content;
      gap: 8px;
    }
    #hud-tl .perf-live-primary strong {
      min-width: 2ch;
    }
    .perf-live-extra-mobile {
      display: none;
    }
    .tech-breakdown-overlay {
      top: max(12px, env(safe-area-inset-top));
      right: 12px;
      width: min(312px, calc(100vw - 24px));
      padding: 10px 12px;
      font-size: 10px;
      line-height: 1.4;
    }
    .tech-breakdown-overlay dl > div {
      grid-template-columns: 68px minmax(0, 1fr);
      gap: 8px;
    }
  }
  .demo-toolbar { position:fixed; top:max(16px, env(safe-area-inset-top)); left:max(20px, env(safe-area-inset-left)); right:max(20px, env(safe-area-inset-right)); z-index:125; display:flex; justify-content:space-between; align-items:flex-start; gap:16px; pointer-events:none; }
  .demo-toolbar a, .demo-toolbar button { pointer-events:auto; }
  .demo-home { color:#cdf6ff; text-decoration:none; font-size:14px; line-height:1.5; padding:8px 0; text-shadow:0 1px 6px #020b18; }
  .demo-home span { display:block; font-size:11px; }
  .demo-toolbar button, #demo-start, #demo-retry { min-height:44px; padding:10px 14px; border:1px solid #52717e; background:#061725; color:#cdf6ff; font:inherit; font-size:12px; cursor:pointer; }
  .demo-toolbar button:disabled, #demo-start:disabled { opacity:.55; cursor:wait; }
  .demo-toolbar :focus-visible, #demo-retry:focus-visible, #demo-start:focus-visible { outline:2px solid #cdf6ff; outline-offset:4px; }
  #demo-status { position:fixed; bottom:max(24px, env(safe-area-inset-bottom)); left:24px; right:24px; z-index:125; max-width:65ch; font-size:13px; line-height:1.6; color:#cdf6ff; text-shadow:0 1px 6px #020b18; }
  #demo-start { display:block; margin-top:10px; }
  body.demo-awaiting-start #hud-tl, body.demo-awaiting-start #settings-toggle { visibility:hidden; }
  #demo-status[hidden] { display:none; }
  #demo-retry { margin-left:12px; }
  .welcome-noscript { position:fixed; bottom:24px; left:24px; right:24px; z-index:130; padding:16px; background:#061725; color:#cdf6ff; line-height:1.6; }
  body.demo-booting #hud-tl, body.demo-booting #settings-toggle { visibility:hidden; }
  body.demo-booting #loader { display:none; }
  #hud-tl { top:14px; left:14px; }
  #mobile-performance-diagnostics {
    margin-top: 6px;
    max-width: min(320px, calc(100vw - 28px));
    white-space: pre-line;
    font-variant-numeric: tabular-nums;
    line-height: 1.35;
    color: rgba(205, 246, 255, 0.82);
    text-shadow: 0 0 8px rgba(98, 247, 255, 0.28);
  }
  #mobile-movement-pad {
    position: fixed;
    left: max(18px, env(safe-area-inset-left));
    bottom: max(18px, env(safe-area-inset-bottom));
    z-index: 55;
    width: 116px;
    height: 116px;
    border-radius: 50%;
    border: 1px solid rgba(98, 247, 255, 0.34);
    background:
      radial-gradient(circle at 50% 50%, rgba(98, 247, 255, 0.10), rgba(3, 18, 22, 0.28) 58%, rgba(0, 0, 0, 0.38) 100%);
    box-shadow:
      0 0 18px rgba(98, 247, 255, 0.18),
      inset 0 0 18px rgba(98, 247, 255, 0.08);
    pointer-events: auto;
    touch-action: none;
    user-select: none;
    opacity: 0;
    visibility: hidden;
    transform: translate3d(0, 8px, 0);
    transition: opacity 160ms ease, visibility 160ms ease, transform 160ms ease;
    contain: layout paint style;
  }
  #mobile-movement-pad::before,
  #mobile-movement-pad::after {
    content: "";
    position: absolute;
    inset: 18px;
    border-radius: 50%;
    border: 1px solid rgba(98, 247, 255, 0.18);
  }
  #mobile-movement-pad::after {
    inset: 50%;
    width: 1px;
    height: 1px;
    transform: translate(-50%, -50%);
    border: 0;
    box-shadow:
      -38px 0 0 rgba(98, 247, 255, 0.22),
      38px 0 0 rgba(98, 247, 255, 0.22),
      0 -38px 0 rgba(98, 247, 255, 0.22),
      0 38px 0 rgba(98, 247, 255, 0.22);
  }
  #mobile-movement-knob {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    border: 1px solid rgba(232, 254, 255, 0.62);
    background: rgba(98, 247, 255, 0.18);
    box-shadow:
      0 0 14px rgba(98, 247, 255, 0.48),
      inset 0 0 10px rgba(232, 254, 255, 0.16);
    transform: translate3d(-50%, -50%, 0);
    pointer-events: none;
    will-change: transform;
  }
  /* The touch joystick only appears once the reveal is complete (parity with
     the desktop input overlay), not during the wireframe sweep. rf-reveal-done
     is set on <body> at cityRevealComplete by the input-overlay script. */
  body.mobile-landscape.rf-reveal-done #mobile-movement-pad {
    opacity: 1;
    visibility: visible;
    transform: translate3d(0, 0, 0);
  }
  @media (hover: hover) and (pointer: fine) {
    #mobile-movement-pad {
      display: none;
    }
  }
  @media (min-width: 861px) and (hover: hover) and (pointer: fine) {
    #mobile-performance-diagnostics {
      display: none;
    }
  }
  #hud-controls {
    top:14px;
    right:14px;
    width: 380px;
    max-height: calc(100vh - 28px);
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    pointer-events: auto;
    transition: opacity 180ms ease, transform 220ms cubic-bezier(0.22, 1, 0.36, 1), visibility 220ms ease;
    will-change: opacity, transform;
  }
  body.controls-hidden #hud-controls {
    opacity: 0;
    transform: translateX(calc(100% + 28px));
    visibility: hidden;
    pointer-events: none;
  }
  #settings-toggle {
    position: fixed;
    top: 14px;
    right: 408px;
    z-index: 40;
    min-width: 104px;
    border: 1px solid rgba(98,247,255,0.48);
    border-radius: 6px;
    background: rgba(3,18,22,0.76);
    color: #e8feff;
    padding: 9px 11px;
    font: inherit;
    font-size: 11px;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    cursor: pointer;
    pointer-events: auto;
    box-shadow: 0 0 18px rgba(98,247,255,0.12), inset 0 0 0 1px rgba(232,254,255,0.04);
    text-shadow: 0 0 6px rgba(98,247,255,0.35);
    contain: layout paint;
    transition: right 220ms cubic-bezier(0.22, 1, 0.36, 1), border-color 160ms ease, background 160ms ease;
  }
  #settings-toggle:hover {
    border-color: rgba(98,247,255,0.82);
    background: rgba(98,247,255,0.14);
  }
  body.controls-hidden #settings-toggle {
    right: 14px;
  }
  @media (max-width: 860px) {
    #settings-toggle {
      right: 14px;
      top: 14px;
    }
    #hud-controls {
      top: 62px;
      right: 14px;
      width: min(380px, calc(100vw - 28px));
      max-height: calc(100vh - 76px);
    }
  }
  .tag { color:#62f7ff; font-weight:700; }
  .dim { color:#7fa7ad; }
  .rule { height:1px; background:linear-gradient(90deg,#62f7ff44,transparent); margin:6px 0; }
  .control-row {
    display: grid;
    gap: 5px;
    margin: 9px 0 0;
    position: relative;
  }
  .control-row::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 1px;
    width: 6px;
    height: 12px;
    border: 1px solid rgba(232,254,255,0.56);
    border-radius: 2px;
    background: rgba(98,247,255,0.20);
    box-shadow: 0 0 8px rgba(98,247,255,0.25);
    transform: translateX(-50%);
    pointer-events: none;
  }
  .control-row.select-row::after { display: none; }
  .control-head {
    display: flex;
    justify-content: space-between;
    gap: 12px;
  }
  .control-head output,
  .control-head .control-value {
    color: #e8feff;
    font-variant-numeric: tabular-nums;
  }
  input[type="range"] {
    width: 100%;
    accent-color: #62f7ff;
  }
  select.control-select {
    width: 100%;
    border: 1px solid rgba(98,247,255,0.35);
    background: rgba(3,18,22,0.82);
    color: #e8feff;
    border-radius: 6px;
    padding: 7px 8px;
    font: inherit;
    outline: none;
  }
  select.control-select:focus {
    border-color: rgba(98,247,255,0.78);
    box-shadow: 0 0 0 2px rgba(98,247,255,0.12);
  }
  .control-section {
    margin-top: 13px;
    color: #62f7ff;
    font-weight: 700;
    text-transform: uppercase;
  }
  .control-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin: 8px 0 10px;
  }
  .control-tab {
    border: 1px solid rgba(98,247,255,0.32);
    background: rgba(3,18,22,0.72);
    color: #9adce5;
    border-radius: 6px;
    padding: 5px 8px;
    font: inherit;
    cursor: pointer;
  }
  .control-tab.active {
    color: #e8feff;
    border-color: rgba(98,247,255,0.72);
    background: rgba(98,247,255,0.16);
  }
  .control-panels {
    flex: 1 1 auto;
    min-height: 0;
    max-height: none;
    overflow: auto;
    padding-right: 4px;
  }
  .control-panel { display: none; }
  .control-panel.active { display: block; }
  #hud-controls .control-tab:not([data-tab="movement"]):not([data-tab="character"]):not([data-tab="surface-reflections"]):not([data-tab="bloom-fx"]):not([data-tab="led-glow-fx"]):not([data-tab="central-building-leds"]):not([data-tab="wireframe-fx"]):not([data-tab="audio-fx"]):not([data-tab="atmosphere-fx"]):not([data-tab="performance-fx"]),
  #hud-controls .control-panel:not([data-panel="movement"]):not([data-panel="character"]):not([data-panel="surface-reflections"]):not([data-panel="bloom-fx"]):not([data-panel="led-glow-fx"]):not([data-panel="central-building-leds"]):not([data-panel="wireframe-fx"]):not([data-panel="audio-fx"]):not([data-panel="atmosphere-fx"]):not([data-panel="performance-fx"]) {
    display: none !important;
  }
  .control-box {
    margin-top: 12px;
    padding: 10px;
    border: 1px solid rgba(98,247,255,0.24);
    border-radius: 6px;
    background: rgba(3,18,22,0.38);
    box-shadow: inset 0 0 0 1px rgba(232,254,255,0.025);
  }
  .control-box .control-section:first-child {
    margin-top: 0;
  }
  .pose-grid {
    display: grid;
    gap: 8px;
    margin-top: 9px;
  }
  .pose-readout {
    border: 1px solid rgba(98,247,255,0.24);
    border-radius: 6px;
    background: rgba(3,18,22,0.44);
    padding: 8px 9px;
  }
  .pose-readout span {
    display: block;
    color: #62f7ff;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
  }
  .pose-readout output {
    display: block;
    margin-top: 4px;
    color: #e8feff;
    font-variant-numeric: tabular-nums;
    overflow-wrap: anywhere;
  }
  .control-actions-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }
  .control-actions-row .control-action {
    margin-top: 10px;
  }
  .control-action {
    width: 100%;
    margin-top: 10px;
    border: 1px solid rgba(98,247,255,0.45);
    background: rgba(98,247,255,0.10);
    color: #e8feff;
    border-radius: 6px;
    padding: 8px 10px;
    font: inherit;
    cursor: pointer;
  }
  .control-action:hover { background: rgba(98,247,255,0.18); }
  .control-action.saved {
    border-color: rgba(180,255,238,0.72);
    background: rgba(180,255,238,0.15);
  }
  .retro-benchmark-panel {
    position: fixed;
    right: max(14px, env(safe-area-inset-right));
    bottom: max(14px, env(safe-area-inset-bottom));
    z-index: 130;
    width: min(360px, calc(100vw - 28px));
    box-sizing: border-box;
    padding: 12px;
    border: 1px solid rgba(98,247,255,0.38);
    border-radius: 8px;
    background: rgba(1,10,14,0.94);
    color: #e8feff;
    box-shadow: 0 18px 46px rgba(0,0,0,0.58), 0 0 22px rgba(98,247,255,0.12);
    font-family: 'SF Mono', 'Menlo', 'Consolas', monospace;
    font-size: 11px;
    line-height: 1.35;
    pointer-events: auto;
  }
  .retro-benchmark-panel[hidden] {
    display: none !important;
  }
  .retro-benchmark-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    color: #e8feff;
    text-transform: uppercase;
  }
  .retro-benchmark-head strong {
    font-size: 12px;
    letter-spacing: 0.08em;
  }
  .retro-benchmark-head span {
    color: rgba(154,220,229,0.92);
    font-variant-numeric: tabular-nums;
    text-align: right;
  }
  .retro-benchmark-progress {
    height: 4px;
    margin: 10px 0 12px;
    border-radius: 999px;
    background: rgba(98,247,255,0.12);
    overflow: hidden;
  }
  .retro-benchmark-progress span {
    display: block;
    width: 0;
    height: 100%;
    border-radius: inherit;
    background: rgba(98,247,255,0.88);
    box-shadow: 0 0 12px rgba(98,247,255,0.45);
  }
  .retro-benchmark-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
    margin: 0;
  }
  .retro-benchmark-grid div {
    min-width: 0;
    padding: 7px 8px;
    border: 1px solid rgba(98,247,255,0.18);
    border-radius: 6px;
    background: rgba(3,18,22,0.62);
  }
  .retro-benchmark-grid dt {
    margin: 0 0 3px;
    color: rgba(154,220,229,0.82);
    font-size: 9px;
    text-transform: uppercase;
  }
  .retro-benchmark-grid dd {
    margin: 0;
    color: #e8feff;
    font-size: 14px;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    overflow-wrap: anywhere;
  }
  .retro-benchmark-actions {
    display: grid;
    grid-template-columns: 1fr 1fr auto;
    gap: 7px;
    margin-top: 10px;
  }
  .retro-benchmark-actions button {
    min-height: 30px;
    border: 1px solid rgba(98,247,255,0.42);
    border-radius: 6px;
    background: rgba(98,247,255,0.10);
    color: #e8feff;
    font: inherit;
    cursor: pointer;
  }
  .retro-benchmark-actions button:hover:not(:disabled),
  .retro-benchmark-actions button:focus-visible {
    background: rgba(98,247,255,0.18);
    outline: none;
  }
  .retro-benchmark-actions button:disabled {
    cursor: not-allowed;
    opacity: 0.42;
  }
  body.mobile-landscape .retro-benchmark-panel {
    right: max(8px, env(safe-area-inset-right));
    bottom: max(8px, env(safe-area-inset-bottom));
    width: min(286px, calc(100vw - 16px));
    max-height: calc(100vh - 16px);
    overflow: auto;
    padding: 8px;
    border-radius: 7px;
    font-size: 9px;
    line-height: 1.25;
  }
  body.mobile-landscape .retro-benchmark-head {
    gap: 8px;
  }
  body.mobile-landscape .retro-benchmark-head strong {
    font-size: 10px;
  }
  body.mobile-landscape .retro-benchmark-progress {
    height: 3px;
    margin: 7px 0 8px;
  }
  body.mobile-landscape .retro-benchmark-grid {
    gap: 5px;
  }
  body.mobile-landscape .retro-benchmark-grid div {
    padding: 5px 6px;
  }
  body.mobile-landscape .retro-benchmark-grid dt {
    font-size: 8px;
  }
  body.mobile-landscape .retro-benchmark-grid dd {
    font-size: 11px;
  }
  body.mobile-landscape .retro-benchmark-actions {
    grid-template-columns: 1fr 1fr auto;
    gap: 5px;
    margin-top: 7px;
  }
  body.mobile-landscape .retro-benchmark-actions button {
    min-height: 24px;
    padding: 0 6px;
  }
  #loader {
    position:fixed; inset:0; display:flex; align-items:center; justify-content:center;
    z-index:9999; background:#000; color:transparent; font-size:0;
  }
  #loader.hidden { display:none; }
  #boundary-error-overlay {
    position: fixed;
    left: 50%;
    top: 46%;
    z-index: 8;
    pointer-events: none;
    color: #e8feff;
    line-height: 1;
    opacity: 0;
    mix-blend-mode: screen;
    transform: translate(-50%, -50%);
    will-change: opacity, transform, filter;
  }
  .boundary-error-window {
    position: relative;
    min-width: 12.5ch;
    padding: 1.25em 1.55em 1.15em;
    border: 1px solid rgba(197,252,255,0.88);
    background:
      linear-gradient(180deg, rgba(105,242,255,0.13) 0 0.42em, rgba(4,16,20,0.78) 0.42em 100%),
      repeating-linear-gradient(180deg, rgba(177,250,255,0.10) 0 1px, transparent 1px 6px);
    box-shadow:
      0 0 0 1px rgba(98,247,255,0.18) inset,
      0 0 18px rgba(98,247,255,0.58),
      0 12px 44px rgba(0,0,0,0.62);
    transform: perspective(360px) rotateX(3deg) translateZ(0);
  }
  .boundary-error-window::after {
    content: "";
    position: absolute;
    inset: 0.7em 0.65em 0.55em;
    border: 1px solid rgba(98,247,255,0.24);
    transform: translate(0.18em, 0.16em);
    opacity: 0.52;
  }
  .boundary-error-x {
    position: absolute;
    top: 0.22em;
    right: 0.42em;
    color: rgba(232,254,255,0.94);
    font-weight: 900;
    font-size: 0.52em;
    letter-spacing: 0;
    text-shadow: 0 0 8px rgba(98,247,255,0.82);
  }
  .boundary-error-text {
    position: relative;
    z-index: 1;
    display: block;
    color: #e8feff;
    font-weight: 900;
    letter-spacing: 0.10em;
    text-shadow:
      0 0 3px rgba(232,254,255,0.92),
      0 0 12px rgba(98,247,255,0.82),
      0 0 32px rgba(98,247,255,0.45);
    transform: translate(-0.06em, -0.03em);
  }
  .boundary-error-text::before,
  .boundary-error-text::after {
    content: "//error";
    position: absolute;
    inset: 0;
    opacity: var(--error-glitch-opacity, 0);
    pointer-events: none;
  }
  .boundary-error-text::before {
    color: rgba(98,247,255,0.76);
    transform: translate(var(--error-glitch-x, 0), -0.015em);
  }
  .boundary-error-text::after {
    color: rgba(232,254,255,0.62);
    transform: translate(calc(var(--error-glitch-x, 0) * -0.62), 0.018em);
  }
  .err { color:#ff7777; }

  /* ---- input overlay (WASD + mouse), ported 1:1 from /tecnologie/gaussian-splatting ---- */
  .splat-input-overlay {
    --splat-control-ink: oklch(97% .006 260);
    --splat-control-border: oklch(97% .006 260 / .78);
    --splat-control-glass: oklch(97% .006 260 / .11);
    --splat-control-glass-hover: oklch(97% .006 260 / .16);
    --splat-control-glass-active: oklch(82% .18 67 / .24);
    --splat-control-hot: oklch(82% .18 67);
    --splat-control-unit: clamp(3.705rem, 5.85vw, 5.33rem);
    --splat-key-gap: clamp(.221rem, .403vw, .338rem);
    --splat-stroke: 1.5px;
    z-index: 40;
    color: var(--splat-control-ink);
    opacity: 0;
    /* visibility, non solo opacity: con la sola opacity i cinque bottoni W A S D
       e mouse restano nel tab order anche mentre l'overlay e' invisibile, e siccome
       stanno prima della cover nel DOM diventano i primi cinque stop di Tab della
       pagina. Un utente da tastiera doveva premere Tab sei volte per arrivare a
       "Esplora i reparti". is-active viene aggiunta a reveal completato, cioe'
       quando i tasti servono davvero. */
    visibility: hidden;
    pointer-events: none;
    font-family: Sora, Avenir Next, Segoe UI, sans-serif;
    transition: opacity .18s cubic-bezier(.16, 1, .3, 1), visibility .18s cubic-bezier(.16, 1, .3, 1);
    position: fixed;
    inset: 0;
  }
  .splat-input-overlay.is-active { opacity: 1; visibility: visible; }
  .splat-input-overlay, .splat-input-overlay * { box-sizing: border-box; }
  .splat-control-row {
    --splat-key-size: calc((var(--splat-control-unit) - (2 * var(--splat-key-gap))) / 3);
    left: max(1.1rem, env(safe-area-inset-left));
    bottom: max(1rem, env(safe-area-inset-bottom));
    pointer-events: none;
    justify-content: flex-start;
    align-items: center;
    gap: clamp(.75rem, 2.1vw, 2rem);
    display: flex;
    position: absolute;
  }
  .splat-control-unit { min-width: var(--splat-control-unit); justify-items: center; gap: .78rem; display: grid; }
  .splat-glyph-box {
    width: var(--splat-control-unit);
    height: var(--splat-control-unit);
    color: var(--splat-control-ink);
    place-items: center;
    display: grid;
  }
  .splat-wasd-pad {
    grid-template-columns: repeat(3, var(--splat-key-size));
    grid-template-rows: repeat(2, var(--splat-key-size));
    gap: var(--splat-key-gap);
    place-content: center;
  }
  .splat-key-button, .splat-mouse-button {
    appearance: none;
    color: inherit;
    cursor: pointer;
    font: inherit;
    pointer-events: auto;
    -webkit-tap-highlight-color: transparent;
    background: 0 0;
    border: 0;
  }
  .splat-key-button {
    width: var(--splat-key-size);
    height: var(--splat-key-size);
    border: var(--splat-stroke) solid var(--splat-control-border);
    background: var(--splat-control-glass);
    min-width: 0;
    min-height: 0;
    color: var(--splat-control-ink);
    font-family: Sora, Avenir Next, Segoe UI, sans-serif;
    font-size: calc(var(--splat-control-unit) * .198);
    font-weight: 800;
    line-height: 1;
    padding: 0;
    -webkit-backdrop-filter: blur(12px) saturate(1.2);
    backdrop-filter: blur(12px) saturate(1.2);
    border-radius: .18rem;
    place-items: center;
    transition: background .16s cubic-bezier(.16, 1, .3, 1), border-color .16s cubic-bezier(.16, 1, .3, 1), color .16s cubic-bezier(.16, 1, .3, 1), transform .16s cubic-bezier(.16, 1, .3, 1);
    display: grid;
  }
  .splat-key-button[data-splat-control="w"] { grid-area: 1 / 2; }
  .splat-key-button[data-splat-control="a"] { grid-area: 2 / 1; }
  .splat-key-button[data-splat-control="s"] { grid-area: 2 / 2; }
  .splat-key-button[data-splat-control="d"] { grid-area: 2 / 3; }
  .splat-key-button:hover { background: var(--splat-control-glass-hover); }
  .splat-key-button.is-live, .splat-key-button:active {
    border-color: var(--splat-control-hot);
    background: var(--splat-control-glass-active);
    color: var(--splat-control-hot);
    transform: translateY(3px);
  }
  .splat-key-button:focus-visible { outline: 3px solid var(--splat-control-hot); outline-offset: 5px; }
  .splat-mouse-button { width: var(--splat-control-unit); height: var(--splat-control-unit); padding: 0; }
  /* Il bottone mouse e' un quadrato che contiene una sagoma di mouse molto piu'
     piccola: un outline sul bottone starebbe lontanissimo dalla grafica. Prima
     veniva annullato con `outline: 0` senza nessun sostituto, quindi da tastiera
     non si vedeva dove si era. Il ring segue la sagoma. */
  .splat-mouse-button:focus-visible { outline: 0; }
  .splat-mouse-button:focus-visible .splat-mouse-outline { outline: 3px solid var(--splat-control-hot); outline-offset: 5px; }
  .splat-mouse-outline {
    border: var(--splat-stroke) solid var(--splat-control-border);
    background: var(--splat-control-glass);
    border-radius: 48% 48% 42% 42% / 34% 34% 44% 44%;
    width: 44.7%;
    height: 70.8%;
    margin: auto;
    transition: background .16s cubic-bezier(.16, 1, .3, 1), border-color .16s cubic-bezier(.16, 1, .3, 1), transform .16s cubic-bezier(.16, 1, .3, 1);
    display: block;
    position: relative;
  }
  .splat-mouse-outline::before {
    content: "";
    width: var(--splat-stroke);
    background: var(--splat-control-border);
    opacity: .9;
    border-radius: 999px;
    height: 22%;
    position: absolute;
    inset-block-start: 10%;
    inset-inline-start: 50%;
    transform: translate(-50%);
  }
  .splat-mouse-outline::after {
    content: "";
    inline-size: 64%;
    block-size: var(--splat-stroke);
    background: var(--splat-control-border);
    opacity: .34;
    position: absolute;
    inset-block-start: 35%;
    inset-inline-start: 18%;
  }
  .splat-mouse-button.is-live .splat-mouse-outline, .splat-mouse-button:active .splat-mouse-outline {
    border-color: var(--splat-control-hot);
    background: var(--splat-control-glass-active);
    transform: translateY(3px);
  }
  .splat-control-caption {
    border: 1px solid var(--splat-control-border);
    background: var(--splat-control-glass);
    min-height: 1.25rem;
    color: var(--splat-control-ink);
    text-align: center;
    text-transform: uppercase;
    -webkit-backdrop-filter: blur(12px) saturate(1.2);
    backdrop-filter: blur(12px) saturate(1.2);
    border-radius: .32rem;
    justify-content: center;
    align-items: center;
    padding: .22rem .38rem;
    font-size: clamp(.58rem, .7vw, .72rem);
    font-weight: 950;
    line-height: 1;
    display: inline-flex;
  }
  /* Look onboarding: until the scene is clicked, the mouse icon + its caption
     pulse orange ("Clicca") to prompt entering mouse-look. First click swaps
     the caption to "Guarda" and drops the .is-look-hint state. */
  @keyframes rf-look-hint-mouse {
    0%, 100% { border-color: var(--splat-control-border); background: var(--splat-control-glass); }
    50% { border-color: var(--splat-control-hot); background: var(--splat-control-glass-active); }
  }
  @keyframes rf-look-hint-caption {
    0%, 100% { border-color: var(--splat-control-border); color: var(--splat-control-ink); background: var(--splat-control-glass); }
    50% { border-color: var(--splat-control-hot); color: var(--splat-control-hot); background: var(--splat-control-glass-active); }
  }
  .splat-input-overlay.is-look-hint [data-symbol="mouse"] .splat-mouse-outline {
    animation: rf-look-hint-mouse 1.05s ease-in-out infinite;
  }
  .splat-input-overlay.is-look-hint [data-symbol="mouse"] .splat-control-caption {
    animation: rf-look-hint-caption 1.05s ease-in-out infinite;
  }
  /* Hide the pointer/keyboard indicator on every touch device (matches the
     demo's own mobile query in MOBILE_PERFORMANCE_QUERY): a landscape phone is
     wider than 640px but still has no mouse — it uses the touch joystick. */
  @media (max-width: 760px), (hover: none), (pointer: coarse) {
    .splat-input-overlay { display: none !important; }
  }
  @media (prefers-reduced-motion: reduce) {
    .splat-input-overlay, .splat-key-button, .splat-mouse-outline { transition-duration: .01ms !important; }
    /* No blink: keep a steady orange hint instead. */
    .splat-input-overlay.is-look-hint [data-symbol="mouse"] .splat-mouse-outline { animation: none; border-color: var(--splat-control-hot); background: var(--splat-control-glass-active); }
    .splat-input-overlay.is-look-hint [data-symbol="mouse"] .splat-control-caption { animation: none; border-color: var(--splat-control-hot); color: var(--splat-control-hot); background: var(--splat-control-glass-active); }
  }

  /* ---- rotate-to-landscape prompt (mobile portrait, blocks demo start) ---- */
  #rf-rotate-prompt {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: none;
    place-items: center;
    background: oklch(0% 0 0);
    color: rgba(98, 247, 255, 0.92);
    font-family: Sora, Avenir Next, Segoe UI, sans-serif;
    text-align: center;
    padding: 24px;
  }
  body.rf-awaiting-landscape #rf-rotate-prompt {
    display: grid;
  }
  .rf-rotate-card {
    display: grid;
    justify-items: center;
    gap: 14px;
    max-width: 22rem;
  }
  .rf-rotate-icon {
    color: rgba(98, 247, 255, 0.92);
    filter: drop-shadow(0 0 16px rgba(98, 247, 255, 0.45));
    transform-origin: 50% 50%;
    animation: rf-rotate-hint 2.2s ease-in-out infinite;
  }
  @keyframes rf-rotate-hint {
    0%, 18% { transform: rotate(0deg); }
    48%, 72% { transform: rotate(-90deg); }
    100% { transform: rotate(0deg); }
  }
  .rf-rotate-text {
    margin: 0;
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    text-transform: uppercase;
  }
  .rf-rotate-sub {
    margin: 0;
    font-size: 0.85rem;
    font-weight: 400;
    color: rgba(232, 254, 255, 0.62);
  }
  @media (prefers-reduced-motion: reduce) {
    .rf-rotate-icon { animation: none; transform: rotate(-45deg); }
  }

.welcome-model-credit { display: block; margin-top: 8px; color: #9aa5ad; font-size: 10px; line-height: 1.5; }
.welcome-model-credit a { color: inherit; text-decoration: underline; }