.print-only {
  display: none !important;
}

@page {
  size: A4 portrait;
  margin: 10mm;
}

@media print {
  .print-only {
    display: block !important;
  }

  html {
    font-size: 10pt;
  }

  body {
    background: #ffffff;
    color: #000000;
    line-height: 1.35;
  }

  a {
    color: #000000;
    text-decoration: none;
  }

  .site-header {
    background: #ffffff;
    color: #000000;
    border-bottom: 1.5pt solid #000000;
    padding: 0 0 3mm;
  }

  .site-header__inner {
    width: 100%;
    justify-content: flex-start;
    gap: 3mm;
  }

  .site-header__brand,
  .site-header__product,
  .site-nav a {
    color: #000000;
  }

  .site-header__brand {
    min-height: 0;
    gap: 3mm;
  }

  .site-header__logo {
    height: 9mm;
    width: auto;
    print-color-adjust: exact;
    -webkit-print-color-adjust: exact;
  }

  .site-header__product {
    font-size: 11pt;
  }

  .site-nav,
  .breadcrumb,
  .no-print,
  .form-actions,
  .result-actions,
  .diagram-overlays,
  .tool-finder,
  .understand-panel,
  .site-footer,
  .badge,
  .field__hint,
  .tool-intro > p,
  .diagram-panel .notice,
  .result-group > p,
  button {
    display: none !important;
  }

  .site-main {
    padding: 0;
    width: 100%;
  }

  .tool-intro {
    margin: 3mm 0 4mm;
  }

  .tool-intro h1 {
    margin: 0;
    font-size: 14pt;
  }

  .tool-workspace,
  .diagram-panel,
  .panel,
  .print-assumptions {
    margin: 0 0 4mm;
    padding: 0;
    border: 0;
    background: #ffffff;
    box-shadow: none;
    gap: 2mm;
  }

  .tool-workspace {
    display: flex;
    flex-direction: column;
  }

  /* Print keeps the Version 0.1 sheet order: inputs, results, then the pair schematic.
     Screen reading order stays inputs, schematic, results. */
  /* The workspace is a column, but the screen rule align-items: start still
     applies. Without an explicit stretch, Inputs and Results shrink to the
     width of their text instead of the printable line. */
  #spur-gear-form {
    order: 1;
    align-self: stretch;
    width: 100%;
  }

  .results-panel {
    order: 2;
    align-self: stretch;
    width: 100%;
  }

  .diagram-panel {
    order: 3;
  }

  h2 {
    margin: 0 0 1.5mm;
    font-size: 11pt;
    break-after: avoid;
    page-break-after: avoid;
  }

  h3 {
    margin: 2mm 0 1mm;
    font-size: 10pt;
    break-after: avoid;
    page-break-after: avoid;
  }

  #spur-gear-form h2 {
    margin-bottom: 2mm;
  }

  .field-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    border-top: 0.4pt solid #000000;
    border-left: 0.4pt solid #000000;
  }

  .field {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: baseline;
    column-gap: 2.5mm;
    padding: 1.4mm 2.5mm;
    border-right: 0.4pt solid #000000;
    border-bottom: 0.4pt solid #000000;
  }

  .field__control {
    display: flex;
    align-items: baseline;
    justify-content: flex-end;
    gap: 1.5mm;
    min-height: 0;
  }

  .field label {
    font-weight: 500;
  }

  .field__input {
    min-height: 0;
    width: 16mm;
    padding: 0;
    border: 0;
    border-radius: 0;
    background: transparent;
    color: #000000;
    font-size: 10pt;
    font-weight: 650;
    text-align: right;
    -webkit-appearance: none;
    appearance: textfield;
  }

  .field__input::-webkit-outer-spin-button,
  .field__input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
  }

  .field__unit {
    min-width: 0;
    font-weight: 650;
  }

  .message-box {
    padding: 1.5mm 2.5mm;
    border-radius: 0;
    break-inside: avoid;
    page-break-inside: avoid;
  }

  .message-box--error,
  .message-box--warning {
    background: #ffffff;
    color: #000000;
    border: 0.4pt solid #000000;
  }

  .message-box .muted {
    display: none;
  }

  .message-box h3 {
    margin-top: 0;
  }

  .messages__list {
    margin: 0;
  }

  #checks-panel {
    break-inside: avoid;
    page-break-inside: avoid;
  }

  .result-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0 5mm;
    align-items: start;
    break-inside: avoid;
    page-break-inside: avoid;
  }

  .result-group > h2 {
    grid-column: 1 / -1;
    grid-row: 1;
  }

  .result-group > h3:nth-of-type(1) {
    grid-column: 1;
    grid-row: 2;
  }

  .result-group > dl:nth-of-type(1) {
    grid-column: 1;
    grid-row: 3;
  }

  .result-group > h3:nth-of-type(2) {
    grid-column: 2;
    grid-row: 2;
  }

  .result-group > dl:nth-of-type(2) {
    grid-column: 2;
    grid-row: 3;
  }

  .result-group > h3:nth-of-type(3) {
    grid-column: 1 / -1;
    grid-row: 4;
  }

  .result-group > dl:nth-of-type(3) {
    grid-column: 1 / -1;
    grid-row: 5;
  }

  .result-list {
    gap: 0;
  }

  .result-list > div {
    padding: 0.9mm 0;
    border-bottom-color: #000000;
  }

  .result-list > div[hidden] {
    display: none !important;
  }

  .result-value,
  .result-value--pending {
    color: #000000;
  }

  .diagram-panel {
    break-inside: avoid;
    page-break-inside: avoid;
  }

  .diagram-svg {
    border: 0.4pt solid #000000;
    aspect-ratio: auto;
    min-height: 0;
    max-height: 78mm;
    width: 100%;
    height: auto;
  }

  .diagram-stage:has(#gear-diagram:not([hidden])) {
    display: block !important;
  }

  .diagram-svg--screen-hidden {
    display: block !important;
  }

  .diagram-svg[hidden] {
    display: none !important;
  }

  #gear-outline,
  #tooth-profile,
  .tooth-frame,
  .diagram-svg--previous {
    display: none !important;
  }

  .diagram-circle--outside,
  .diagram-circle--base {
    stroke: #000000;
  }

  .print-assumptions {
    break-inside: avoid;
    page-break-inside: avoid;
    border-top: 0.4pt solid #000000;
    padding-top: 3mm;
  }

  .print-assumptions p,
  .print-assumptions li {
    margin: 0 0 1mm;
    font-size: 8.5pt;
  }

  .print-assumptions ul {
    margin: 0;
    padding-left: 4mm;
  }
}