:root {
      --bg: #070707;
      --panel: #101010;
      --panel-2: #050505;
      --text: #f4f4f4;
      --muted: #bdbdbd;
      --line: #777777;
      --accent: #eeeeee;
      --danger: #ffb3b3;
    }

    * {
      box-sizing: border-box;
      font-family: "Courier New", Courier, monospace;
    }

    body {
      margin: 0;
      min-height: 100vh;
      background: var(--bg);
      color: var(--text);
      font-family: "Courier New", Courier, monospace;
    }

    .app {
      display: grid;
      grid-template-columns: minmax(320px, 440px) minmax(600px, 1fr);
      gap: 24px;
      padding: 24px;
      min-height: 100vh;
    }

    .left-column {
      height: fit-content;
      position: sticky;
      top: 24px;
    }

    .controls {
      background: var(--panel);
      border: 1px solid var(--line);
      padding: 18px;
      border-radius: 10px;
      height: fit-content;
    }

    h1 {
      font-size: 15px;
      margin: 0;
      letter-spacing: 0.04em;
      text-transform: uppercase;
    }

    .intro {
      margin: 0 0 18px;
      color: var(--muted);
      font-size: 14px;
      line-height: 1.45;
    }

    fieldset {
      border: 1px solid var(--line);
      margin: 0 0 16px;
      padding: 14px;
      border-radius: 8px;
    }

    legend {
      padding: 0 8px;
      color: var(--accent);
      text-transform: uppercase;
      font-size: 14px;
      letter-spacing: 0.08em;
    }

    label {
      display: block;
      margin: 0 0 10px;
      font-size: 14px;
      color: var(--muted);
    }

    input,
    textarea,
    select {
      width: 100%;
      margin-top: 5px;
      padding: 9px 10px;
      border: 1px solid var(--line);
      border-radius: 6px;
      background: var(--panel-2);
      color: var(--text);
      font: inherit;
      font-size: 15px;
    }

    textarea {
      min-height: 220px;
      resize: vertical;
      line-height: 1.35;
    }

    .row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 10px;
    }

    .checks {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 8px 12px;
      margin-top: 8px;
    }

    .checks label {
      display: flex;
      align-items: center;
      gap: 8px;
      margin: 0;
      color: var(--text);
    }

    .checks input {
      width: auto;
      margin: 0;
    }

    .buttons {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 10px;
    }

    button {
      cursor: pointer;
      border: 1px solid var(--accent);
      background: var(--text);
      color: #111111;
      font: inherit;
      font-size: 15px;
      padding: 11px 10px;
      border-radius: 6px;
      text-transform: uppercase;
      letter-spacing: 0.04em;
    }

    button.secondary {
      background: transparent;
      color: var(--text);
    }

    .color-row {
      display: grid;
      grid-template-columns: repeat(10, 1fr);
      gap: 6px;
      margin-top: 14px;
    }

    .color-swatch {
      width: 100%;
      aspect-ratio: 1;
      min-height: 24px;
      border: 1px solid #444444;
      border-radius: 4px;
      padding: 0;
      background: var(--swatch-color);
    }

    .color-swatch.active {
      outline: 2px solid var(--text);
      outline-offset: 2px;
    }

    .number-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 6px;
      margin-top: 8px;
    }

    .number-box {
      display: flex;
      align-items: center;
      justify-content: center;
      min-height: 28px;
      border: 1px solid #444444;
      border-radius: 4px;
      color: var(--text);
      background: var(--panel-2);
      font-size: 13px;
      padding: 6px 4px;
      cursor: pointer;
      text-transform: uppercase;
      letter-spacing: 0.03em;
    }

    .number-box.active {
      outline: 2px solid var(--text);
      outline-offset: 2px;
    }

    .warning {
      color: var(--danger);
      font-size: 14px;
      line-height: 1.4;
      min-height: 18px;
      margin-top: 12px;
    }

    .preview-wrap {
      min-width: 0;
    }

    .preview-header {
      display: flex;
      justify-content: space-between;
      align-items: end;
      gap: 16px;
      margin-bottom: 12px;
    }

    .preview-header h2 {
      margin: 0;
      font-size: 15px;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }

    .total {
      color: var(--muted);
      font-size: 13px;
    }

    .page-shell {
      overflow: auto;
      padding: 16px;
      background: #050505;
      border: 1px solid var(--line);
      border-radius: 10px;
    }

    #printPage {
      position: relative;
      display: inline-block;
      padding: 34px 38px;
      background-color: var(--preview-base, #0b0b0b);
      background-image: var(--preview-overlay, none);
      background-repeat: var(--preview-repeat, no-repeat);
      background-position: var(--preview-position, center);
      background-size: var(--preview-size, cover);
      color: #f5f5f5;
      border: 1px solid #333333;
      box-shadow: 0 18px 48px rgba(0,0,0,0.35);
    }

    #asciiPreview {
      position: relative;
      z-index: 1;
      margin: 0;
      font-family: "Courier New", Courier, monospace;
      font-size: 16px;
      line-height: 1.35;
      letter-spacing: 0.02em;
      white-space: pre;
    }

    @media (max-width: 980px) {
      .app {
        grid-template-columns: 1fr;
      }

      .left-column {
        position: static;
      }
    }

    @media print {
      body {
        background: #ffffff !important;
        color: #000000 !important;
      }

      .left-column,
      .preview-header {
        display: none !important;
      }

      .app {
        display: block;
        padding: 0;
      }

      .preview-wrap,
      .page-shell {
        display: block;
        padding: 0;
        margin: 0;
        border: none;
        background: #ffffff !important;
        overflow: visible;
      }

      #printPage {
        padding: 0;
        margin: 0;
        border: none;
        box-shadow: none;
        background: #ffffff !important;
        color: #000000 !important;
      }

      #asciiPreview {
        color: #000000 !important;
        font-size: 12pt;
        line-height: 1.28;
      }

      @page {
        size: letter portrait;
        margin: 0.45in;
      }
    }