:root{
      --ui-font: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
      --bg:#000;
      --fg:#fff;
      --font: 14px;
      --topOffset: 22vh;
      --bottomLift: 0px;
      --stackTop: calc(24px + env(safe-area-inset-top) + 60px);
      --stackBottom: calc(24px + env(safe-area-inset-bottom) + 110px);
      --deskBottomControlsLift: 0px;
      --pageIndent: 16px;
      --brandTop: 18px;
    }

    html, body{
      font-family: var(--ui-font);
      height: 100%;
      margin: 0;
      background: var(--bg);
      color: var(--fg);
      overflow: hidden;
      overscroll-behavior: none;
      touch-action: manipulation;
    }
    body:not(.page){
      touch-action: none;
    }

    body{
      font-family: var(--ui-font);
      --flash: 0;
      display:flex;
      flex-direction: column;
      align-items:center;
      justify-content:center;
      padding: 24px;
      padding-top: calc(24px + env(safe-area-inset-top));
      padding-bottom: calc(24px + env(safe-area-inset-bottom));
      box-sizing: border-box;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }

    body.page{
      justify-content: flex-start;
      padding-top: calc(90px + env(safe-area-inset-top));
      padding-bottom: calc(60px + env(safe-area-inset-bottom));
      min-height: 100vh;
      overflow: hidden;
    }

    /* Screen flash inversion overlay */
    body::before{
      content:"";
      position: fixed;
      inset: 0;
      background: #fff;
      opacity: var(--flash);
      pointer-events: none;
      z-index: 5;
      mix-blend-mode: difference;
    }

    /* Top controls */
    #headerBar{
      position: fixed;
      top: calc(var(--brandTop) + env(safe-area-inset-top));
      left: 0;
      right: 0;
      height: 14px;
      z-index: 20;
      pointer-events: none;
    }
    #headerLogoLink{
      position: absolute;
      left: calc((100vw - min(720px, 100vw)) / 2 + var(--pageIndent) + 8px);
      top: 0;
      height: 14px;
      width: auto;
      display: block;
      pointer-events: auto;
    }
    #headerLogo{
      position: absolute;
      top: 0;
      height: 14px;
      width: auto;
      opacity: 0.85;
      display: block;
    }
    #headerBrand{
      position: absolute;
      left: 50%;
      top: 0;
      transform: translateX(-50%);
      text-align: center;
      font: 600 14px/1.1 var(--ui-font);
      letter-spacing: 0.28em;
      color: rgba(255,255,255,0.75);
      white-space: nowrap;
    }
    #topControls{
      position: fixed;
      top: calc(46px + env(safe-area-inset-top));
      left: calc(22px + env(safe-area-inset-left));
      right: calc(22px + env(safe-area-inset-right));
      display: grid;
      grid-template-columns: repeat(5, minmax(0, 1fr));
      align-items: center;
      column-gap: 16px;
      z-index: 20;
      pointer-events: auto;
    }

    /* Frequency UI (Hz + horizontal slider) */
    #freqUI{
      position: fixed;
      top: calc(46px + env(safe-area-inset-top) + 40px);
      left: calc(14px + env(safe-area-inset-left));
      right: calc(14px + env(safe-area-inset-right));
      z-index: 30;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 10px;
      pointer-events: auto;
      visibility: hidden;
      opacity: 0;
      transform: translateY(-6px);
      transition: opacity 220ms ease, transform 220ms ease;
    }
    #freqUI.visible{
      opacity: 1;
      transform: translateY(0);
      visibility: visible;
    }

    #hzText{
      font: 12px/1.2 var(--ui-font);
      letter-spacing: 0.02em;
      opacity: 0.95;
      user-select: none;
      pointer-events: none;
      transform: translateY(7px);
    }
    .hzWhite{ color: #fff; }
    .hzYellow{ color: #ffd84a; }
    .hzRed{ color: #ff4a4a; }

    /* Warning text under sliders */
    .warnText{
      font: 12px/1.25 var(--ui-font);
      text-align: center;
      opacity: 0.9;
      user-select: none;
      pointer-events: none;
      white-space: pre-line; /* allow \n line breaks */
      position: fixed;
      left: calc(14px + env(safe-area-inset-left));
      right: calc(14px + env(safe-area-inset-right));
      bottom: calc(14px + env(safe-area-inset-bottom) + var(--bottomLift) + var(--adBannerOffset) + var(--footerHeight) + 51px);
    }
    .warnHidden{ display: none; }

    /* WPM UI (text + horizontal slider) */
    #wpmUI{
      position: fixed;
      left: calc(14px + env(safe-area-inset-left));
      right: calc(14px + env(safe-area-inset-right));
      top: calc(46px + env(safe-area-inset-top) + 40px);
      z-index: 30;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 10px;
      pointer-events: auto;
      visibility: hidden;
      opacity: 0;
      transform: translateY(-6px);
      transition: opacity 220ms ease, transform 220ms ease;
    }
    #wpmUI.visible{
      opacity: 1;
      transform: translateY(0);
      visibility: visible;
    }
    #wpmText{
      font: 12px/1.2 var(--ui-font);
      letter-spacing: 0.02em;
      opacity: 0.95;
      user-select: none;
      pointer-events: none;
      text-align: center;
      transform: translateY(7px);
    }

    /* Slider */
    .rangeSlider{
      -webkit-appearance: none;
      appearance: none;
      width: min(520px, 88vw);
      height: 34px;
      background: transparent;
      cursor: pointer;
      /* IMPORTANT: let the range control handle touch dragging */
      touch-action: pan-x;
      pointer-events: auto;
      position: relative;
      z-index: 1;
    }
    .rangeSlider::-webkit-slider-runnable-track{
      height: 3px;
      background: rgba(255,255,255,0.28);
      border-radius: 999px;
    }
    .rangeSlider::-moz-range-track{
      height: 3px;
      background: rgba(255,255,255,0.28);
      border-radius: 999px;
    }
    /* thumb larger */
    .rangeSlider::-webkit-slider-thumb{
      -webkit-appearance: none;
      appearance: none;
      width: 20px;
      height: 14px;
      border-radius: 999px;
      background: rgba(255,255,255,0.92);
      border: 1px solid rgba(0,0,0,0.35);
      margin-top: -6px;
    }
    .rangeSlider::-moz-range-thumb{
      width: 20px;
      height: 14px;
      border-radius: 999px;
      background: rgba(255,255,255,0.92);
      border: 1px solid rgba(0,0,0,0.35);
    }

    /* Bottom controls */
    #bottomControls{
      position: fixed;
      left: calc(22px + env(safe-area-inset-left));
      right: calc(22px + env(safe-area-inset-right));
      bottom: calc(14px + env(safe-area-inset-bottom) + var(--bottomLift));
      display: grid;
      grid-template-columns: repeat(5, minmax(0, 1fr));
      align-items: center;
      column-gap: 16px;
      z-index: 20;
      pointer-events: auto;
    }
    #bottomControls .controlWrap{
      justify-self: center;
    }
    #bottomControls .helpWrap{ grid-column: 1; }
    #bottomControls .repeatWrap{ grid-column: 2; }
    #bottomControls .clearWrap{ grid-column: 3; }
    #bottomControls .manualWrap{
      grid-column: 4 / span 2;
      justify-self: end;
      width: 100%;
      max-width: 220px;
    }

    #stack{
      position: fixed;
      z-index: 1;
      left: 50%;
      transform: translateX(-50%);
      top: var(--stackTop);
      bottom: var(--stackBottom);
      width: min(92vw, 820px);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      cursor: text;
      -webkit-tap-highlight-color: transparent;
      user-select: none;
      pointer-events: auto;
    }

    #typeHint{
      font: 9px/1.2 var(--ui-font);
      letter-spacing: 0.18em;
      color: rgba(255,255,255,0.6);
      text-align: center;
      white-space: pre-line;
      user-select: none;
      pointer-events: none;
      margin-bottom: 8px;
      opacity: 1;
      transition: opacity 260ms ease, margin 260ms ease, max-height 260ms ease;
      max-height: 24px;
    }
    #typeHint.hintHidden{
      opacity: 0;
      margin-bottom: 0;
      max-height: 0;
    }

    #display{
      position: relative;
      font: var(--font)/1.4 var(--ui-font);
      letter-spacing: 0.02em;
      text-align:center;
      white-space: pre-wrap;
      word-break: break-word;
      opacity: 0.92;
      width: 100%;
      max-height: 56vh;
      overflow: visible;
      cursor: text;
      -webkit-tap-highlight-color: transparent;
      user-select: none;
    }

    .committed{ opacity: 0.92; }
    .morseLive{ opacity: 0.55; }

    .lineWrap{
      position: relative;
      display: inline-block;
      max-width: 100%;
      padding: 0 2.2ch;
      box-sizing: border-box;
      min-height: 1.4em; /* keep overlay visible even when empty */
    }
    .morseOverlay{
      position: absolute;
      left: 0;
      top: 0;
      margin-left: 0.8ch; /* applied in JS via left calc */
      white-space: pre;
      pointer-events: none;
    }
    .morseSlot{
      display: inline-block;
      width: 6ch; /* 5 symbols + breathing room */
      text-align: left;
      white-space: pre;
    }

    .pending{
      opacity: 0.28;
    }

    .queueLine{
      position: absolute;
      left: 50%;
      transform: translateX(-50%);
      top: 1.9em;
      width: 100%;
      text-align: center;
      opacity: 0.28;
      white-space: pre-wrap;
      word-break: break-word;
      pointer-events: none;
    }


    .repeatHi{ font-weight: 800; }

    .cursor{
      display:inline-block;
      width: 0.6ch;
      margin-left: 0.1ch;
      transform: translateY(0.05em);
      opacity: 0.85;
      animation: blink 1.05s steps(1, end) infinite;
    }
    @keyframes blink{ 0%,52%{opacity:0;} 53%,100%{opacity:0.85;} }

    /* Hidden input to keep keyboard up */
    #kbd{
      position: fixed;
      left: 0;
      top: 0;
      width: 1px;
      height: 1px;
      opacity: 0;
      pointer-events: auto;
      border: 0;
      padding: 0;
      background: transparent;
      color: transparent;
      caret-color: transparent;
      font-size: 16px;
    }

    .btn{
      width: 42px;
      height: 34px;
      border-radius: 999px;
      border: 1px solid rgba(255,255,255,0.22);
      background: rgba(255,255,255,0.03);
      display:flex;
      align-items:center;
      justify-content:center;
      cursor: pointer;
      user-select:none;
      -webkit-tap-highlight-color: transparent;
      backdrop-filter: blur(6px);
      opacity: 0.78;
      color: #fff;
      padding: 0;
      touch-action: manipulation;
    }
    .btn:hover{ opacity: 0.95; }
    .btn:active{ transform: scale(0.98); }
    .btn.on{
      border-color: rgba(255,255,255,0.5);
      background: rgba(255,255,255,0.08);
      opacity: 0.98;
    }

    .btn.solid{
      background: #fff;
      border-color: #fff;
      color: #000;
      opacity: 1;
      backdrop-filter: none;
    }

    .btn svg{ width: 16px; height: 16px; display:block; }
        #manualKey svg{ width: 24px; height: 24px; }
.btn svg path, .btn svg line, .btn svg circle, .btn svg polyline, .btn svg polygon, .btn svg rect{
      stroke: currentColor;
      stroke-width: 1.6;
      stroke-linecap: round;
      stroke-linejoin: round;
      fill: none;
    }
    .btn svg .dotFill{
      fill: currentColor;
      stroke: none;
    }

    .offSlash{
      opacity: 0;
      transition: opacity 0.15s ease;
    }
    .btn.off .offSlash{ opacity: 1; }

    #clearBtn span{
      font: 16px/1 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
      opacity: 0.9;
      transform: translateY(-0.5px);
    }

    #aboutToggle span{
      font: 16px/1 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
      opacity: 0.9;
      transform: translateY(-0.5px);
    }

    .controlWrap{
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 6px;
    }
    .manualWrap{
      position: relative;
      width: 100%;
      overflow: visible;
      display: grid;
      grid-template-rows: auto 44px;
      row-gap: 6px;
    }
    .controlLabel{
      font: 10px/1 var(--ui-font);
      letter-spacing: 0.12em;
      color: rgba(255,255,255,0.6);
      text-transform: uppercase;
      opacity: 0;
      transform: translateY(-2px);
      transition: opacity 160ms ease, transform 160ms ease;
      pointer-events: none;
      white-space: nowrap;
      text-align: center;
      width: 100%;
    }
    .helpOn .controlLabel{
      opacity: 1;
      transform: translateY(0);
    }

    #topControls .controlWrap{
      flex: 0 0 auto;
    }
    #topControls .controlWrap{
      justify-self: center;
    }
    #topControls .btn{
      width: 42px;
      height: 34px;
      border-radius: 999px;
    }
    #topControls .controlWrap{
      flex: initial;
    }

    .pageContent{
      width: 100%;
      max-width: 720px;
      margin: 0 auto;
      padding: 0 var(--pageIndent);
      text-align: left;
      font: 14px/1.6 var(--ui-font);
      color: rgba(255,255,255,0.92);
      box-sizing: border-box;
    }

    .pageContent h1{
      font: 600 18px/1.3 var(--ui-font);
      margin: 0 0 12px 0;
      letter-spacing: 0.04em;
    }
    .pageContent p{
      margin: 0 0 14px 0;
    }
    .pageContent a{
      color: #fff;
      text-decoration: none;
      border-bottom: 1px solid rgba(255,255,255,0.25);
    }
    .pageContent a:hover{
      border-bottom-color: rgba(255,255,255,0.6);
    }
    .pageBack{
      margin-top: 18px;
    }

    .contactForm{
      display: grid;
      gap: 10px;
      margin: 18px 0 6px;
    }
    .contactForm label{
      display: grid;
      gap: 6px;
      font: 12px/1.3 var(--ui-font);
      color: rgba(255,255,255,0.75);
    }
    .contactForm input,
    .contactForm textarea{
      width: 100%;
      max-width: 100%;
      background: rgba(255,255,255,0.05);
      border: 1px solid rgba(255,255,255,0.2);
      border-radius: 10px;
      color: #fff;
      padding: 10px 12px;
      font: 14px/1.4 var(--ui-font);
      outline: none;
      box-sizing: border-box;
      resize: none;
    }

    /* Prevent iOS Safari auto-zoom on form fields */
    @supports (-webkit-touch-callout: none){
      input, textarea{
        font-size: 16px !important;
      }
    }
    .contactForm input:focus,
    .contactForm textarea:focus{
      border-color: rgba(255,255,255,0.6);
    }
    .contactForm .btn{
      justify-self: start;
      height: 36px;
      padding: 0 14px;
      width: auto;
      font-family: var(--ui-font);
      font-size: 14px;
      border: 1px solid rgba(255,255,255,0.22);
      background: rgba(0,0,0,0.6);
      color: #fff;
      border-radius: 999px;
      opacity: 0.9;
      box-shadow: none;
    }
    .contactForm .btn:hover{
      opacity: 1;
    }
    .formNote{
      font: 11px/1.3 var(--ui-font);
      opacity: 0.65;
      margin: 0;
    }

    @media (max-width: 480px){
      body.page{
        padding-top: calc(72px + env(safe-area-inset-top));
        padding-bottom: calc(56px + env(safe-area-inset-bottom));
      }
      .pageContent{
        width: 100%;
        max-width: 560px;
        padding: 0 14px;
      }
      #headerLogoLink{
        left: calc((100vw - min(720px, 100vw)) / 2 + var(--pageIndent) + 28px);
      }
      #typeHint{
        font-size: 8px !important;
        letter-spacing: 0.16em;
      }
      .pageContent h1{
        margin-bottom: 10px;
      }
      .contactForm{
        gap: 8px;
        margin: 12px 0 6px;
      }
      .contactForm input,
      .contactForm textarea{
        padding: 8px 10px;
        font-size: 16px !important;
      }
      .formNote{
        font-size: 10px;
      }
    }

    @media (max-width: 480px) and (max-height: 720px){
      .pageContent{
        font-size: 13px;
        line-height: 1.5;
      }
      .pageContent h1{
        font-size: 16px;
      }
      .contactForm textarea{
        rows: 3;
      }
    }

    .siteFooter{
      position: fixed;
      left: calc(14px + env(safe-area-inset-left));
      right: calc(14px + env(safe-area-inset-right));
      bottom: calc(8px + env(safe-area-inset-bottom) + var(--bottomLift));
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      font: 10px/1 var(--ui-font);
      letter-spacing: 0.16em;
      color: rgba(255,255,255,0.55);
      z-index: 18;
      pointer-events: auto;
      text-transform: uppercase;
    }
    .siteFooter a{
      color: rgba(255,255,255,0.75);
      text-decoration: none;
    }
    .siteFooter a:hover{
      color: rgba(255,255,255,1);
    }
    .footerSep{
      opacity: 0.6;
    }
    .footerCopy{
      opacity: 0.65;
      margin-left: 6px;
      letter-spacing: 0.08em;
    }

    /* Manual key hidden until first keystroke */
    #manualKey{
      opacity: 0;
      pointer-events: none;
      transform: translateY(8px);
      transition: opacity 600ms ease, transform 600ms ease;
      transition-delay: 120ms;
      width: 100%;
      height: 44px;
      grid-row: 2;
    }
    #manualKey.revealed{
      opacity: 1;
      pointer-events: auto;
      transform: translateY(0);
      transition-delay: 0ms;
    }
    #manualKey.hidden{
      display: none;
    }

    #paddleKeys{
      display: none;
      width: 100%;
      gap: 12px;
      touch-action: none;
      grid-row: 2;
    }
    #paddleKeys.active{
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      column-gap: 12px;
      align-items: center;
    }
    .paddleBtn{
      width: 100%;
      height: 44px;
      border-radius: 999px;
      background: #fff;
      border-color: #fff;
      color: #000;
      box-shadow: 0 8px 18px rgba(0,0,0,0.28), inset 0 1px 1px rgba(255,255,255,0.65);
      touch-action: none;
    }
    .paddleBtn:active{
      transform: scale(0.98);
    }
    :root{
      --morse-dot: 5px;
      --morse-dash-w: 12px;
      --morse-dash-h: 2px;
    }
    .paddleGlyph{
      display: block;
      width: 18px;
      height: 18px;
      margin: 0 auto;
      position: relative;
      opacity: 0.75;
    }
    .dotGlyph::before{
      content: "";
      position: absolute;
      width: var(--morse-dot);
      height: var(--morse-dot);
      border-radius: 999px;
      background: #111;
      left: 50%;
      top: 50%;
      transform: translate(-50%, -50%);
    }
    .dashGlyph::before{
      content: "";
      position: absolute;
      width: var(--morse-dash-w);
      height: var(--morse-dash-h);
      border-radius: 999px;
      background: #111;
      left: 50%;
      top: 50%;
      transform: translate(-50%, -50%);
    }
    .morseIcon{
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      line-height: 0;
    }
    .morseDot{
      width: var(--morse-dot);
      height: var(--morse-dot);
      border-radius: 999px;
      background: currentColor;
    }
    .morseDash{
      width: var(--morse-dash-w);
      height: var(--morse-dash-h);
      border-radius: 999px;
      background: currentColor;
    }

    /* About overlay */
    .overlay{
      position: fixed;
      inset: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      background: rgba(0,0,0,0.55);
      opacity: 0;
      pointer-events: none;
      z-index: 30;
      transition: opacity 220ms ease;
    }
    .overlay.visible{
      opacity: 1;
      pointer-events: auto;
    }
    .morseOverlayPanel{
      backdrop-filter: blur(4px);
    }
    .morseOverlayBox{
      width: min(92vw, 520px);
      max-height: min(78vh, 520px);
      overflow: hidden;
      background: rgba(10,10,10,0.92);
      border: 1px solid rgba(255,255,255,0.08);
      border-radius: 16px;
      padding: 18px 18px 16px;
      box-shadow: 0 18px 40px rgba(0,0,0,0.45);
    }
    .morseOverlayPanel,
    .morseOverlayBox{
      touch-action: none;
    }
    @media (max-width: 640px){
      .morseOverlayPanel{
        align-items: flex-start;
      }
      .morseOverlayBox{
        margin-top: calc(18px + env(safe-area-inset-top));
      }
    }
    .overlaySub{
      font: 600 11px/1.2 var(--ui-font);
      letter-spacing: 0.18em;
      text-transform: uppercase;
      color: rgba(255,255,255,0.6);
      margin: 12px 0 8px;
      text-align: left;
    }
    .morseGrid{
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: 8px 12px;
      font: 12px/1.3 var(--ui-font);
      color: rgba(255,255,255,0.9);
    }
    .morseCell{
      display: flex;
      align-items: baseline;
      gap: 6px;
      white-space: nowrap;
    }
    .morseChar{
      font-weight: 700;
      width: 16px;
      text-align: center;
      color: rgba(255,255,255,0.95);
    }
    .morseCode{
      color: rgba(255,255,255,0.7);
      letter-spacing: 0.06em;
    }
    .morseGridNumbers{
      grid-template-columns: repeat(5, minmax(0, 1fr));
    }
    .morseGridSymbols{
      grid-template-columns: repeat(3, minmax(0, 1fr));
    }
    @media (max-width: 640px){
      .morseGrid{
        gap: 6px 10px;
        font: 11px/1.15 var(--ui-font);
      }
      .morseCell{
        gap: 5px;
      }
    }
    .aboutCard{
      min-width: min(280px, 80vw);
      padding: 16px 18px;
      border-radius: 14px;
      background: rgba(255,255,255,0.08);
      border: 1px solid rgba(255,255,255,0.25);
      backdrop-filter: blur(8px);
      color: #fff;
      font: 14px/1.3 var(--ui-font);
      text-align: center;
      letter-spacing: 0.02em;
    }
  

/* =========================
   Desktop density layout
   ========================= */
@media (min-width: 900px) and (pointer: fine){

  /* Constrain the interactive UI to the center 50% x 50% of the viewport:
     left=25vw, right=75vw, top=25vh, bottom=75vh */
  :root{
      --ui-font: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    --deskLeft: 25vw;
    --deskRightInset: 25vw;   /* inset from right edge (100vw - 75vw) */
    --deskTop: 25vh;
    --deskBottomInset: 25vh;  /* inset from bottom edge (100vh - 75vh) */
    --deskBottomControlsLift: 6vh;
    --pageIndent: 16px;
  }

  /* Top controls in the top band of the focus box */
    #topControls{
      left: calc(var(--deskLeft) + 22px + env(safe-area-inset-left));
      right: calc(var(--deskRightInset) + 22px + env(safe-area-inset-right));
      top: calc(var(--deskTop) + 52px + env(safe-area-inset-top));
      gap: 18px;
    }

  /* Frequency UI sits under the top controls (same spacing as mobile) */
    #freqUI{
      left: calc(var(--deskLeft) + 22px + env(safe-area-inset-left));
      right: calc(var(--deskRightInset) + 22px + env(safe-area-inset-right));
      top: calc(var(--deskTop) + 52px + env(safe-area-inset-top) + 40px);
    }

  /* Bottom controls in the bottom band of the focus box */
    #bottomControls{
      left: calc(var(--deskLeft) + 22px + env(safe-area-inset-left));
      right: calc(var(--deskRightInset) + 22px + env(safe-area-inset-right));
      bottom: calc(var(--deskBottomInset) + 14px + env(safe-area-inset-bottom) + var(--bottomLift) + var(--deskBottomControlsLift));
      gap: 18px;
    }

  /* WPM UI sits above bottom controls (same offset relationship as mobile) */
    #wpmUI{
      left: calc(var(--deskLeft) + 22px + env(safe-area-inset-left));
      right: calc(var(--deskRightInset) + 22px + env(safe-area-inset-right));
      top: calc(var(--deskTop) + 52px + env(safe-area-inset-top) + 40px);
    }

    body.page #headerBar{
      top: calc(var(--brandTop) + env(safe-area-inset-top));
    }

  /* Main stack constrained to the focus box */
  #stack{
    top: var(--stackTop);
    bottom: var(--stackBottom);
    width: min(50vw, 820px);
  }
}

/* =========================
   Banner ad (code-controlled via body[data-ads])
   Toggle by changing: <body data-ads="off"> -> "on"
   ========================= */

:root{
      --ui-font: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --adBannerOffset: 60px;
  --footerHeight: 20px;
  --adHeight: 50px;
}

#adBanner{
  position: fixed;
  left: calc(14px + env(safe-area-inset-left));
  right: calc(14px + env(safe-area-inset-right));
  bottom: calc(14px + env(safe-area-inset-bottom) + var(--bottomLift) + var(--footerHeight));
  height: var(--adHeight);
  max-height: var(--adHeight);
  z-index: 19;

  display: flex;
  align-items: center;
  justify-content: center;

  background: rgba(255,255,255,0.04);
  border: none;
  border-radius: 0;
  overflow: hidden;
  pointer-events: auto;
}

#adBanner .adMount{
  width: 100%;
  height: 100%;
  display: none;
}

#adBanner .adTest{
  width: 100%;
  height: 100%;
  min-height: 100%;
  display: none;
  align-items: center;
  justify-content: center;
  font: 600 12px/1 var(--ui-font);
  letter-spacing: 0.12em;
  color: rgba(255,255,255,0.7);
  background: rgba(255,255,255,0.03);
  border: 1px dashed rgba(255,255,255,0.25);
  box-sizing: border-box;
}
#adBanner .adsbygoogle{
  width: 100% !important;
  height: var(--adHeight) !important;
  min-height: var(--adHeight) !important;
  display: block;
}
#adBanner iframe{
  height: var(--adHeight) !important;
  max-height: var(--adHeight) !important;
}

@media (min-width: 900px){
  :root{
    --adHeight: 90px;
  }
}

#adBanner .adFallback{
  width: 100%;
  text-align: center;
  display: block;
  opacity: 0.85;
  font: 600 12px/1.1 var(--ui-font);
  letter-spacing: 0.02em;
}
#adBanner .adFallback a{
  color: #fff !important;
  text-decoration: none;
}
#adBanner .adFallback a:hover{
  color: #fff !important;
  text-decoration: underline;
}
#adBanner .adFallback a.adFallbackLink,
#adBanner .adFallback a.adFallbackLink:visited,
#adBanner .adFallback a.adFallbackLink:link{
  color: #fff !important;
  text-decoration: none !important;
}

@media (min-width: 900px){
  #adBanner .adFallback a.adFallbackLink{
    font-size: 18px;
  }
}

/* Code toggle (no JS): show mount when on */
body[data-ads="on"] #adBanner .adMount{ display: block; }
body[data-ads="on"] #adBanner .adFallback{ display: none; }

body[data-ads="test"] #adBanner .adMount{ display: block; }
body[data-ads="test"] #adBanner .adFallback{ display: none; }
body[data-ads="test"] #adBanner .adsbygoogle{ display: none !important; }
body[data-ads="test"] #adBanner .adTest{ display: flex; }

/* Hide fallback once ads load */
#adBanner.adLoaded .adFallback{ display: none; }

/* Keep buttons above banner on all breakpoints */
#bottomControls{
  bottom: calc(14px + env(safe-area-inset-bottom) + var(--bottomLift) + var(--adBannerOffset) + var(--footerHeight)) !important;
}

@media (min-width: 900px) and (pointer: fine){
  /* Desktop: lift bottom controls within the focus box */
  #bottomControls{
    bottom: calc(var(--deskBottomInset) + 14px + env(safe-area-inset-bottom) + var(--bottomLift) + var(--adBannerOffset) + var(--footerHeight) + var(--deskBottomControlsLift)) !important;
  }
}