/* Barcode Structure Diagram — Codepool demo styles.

   Visual language follows the Dynamsoft style guide
   (https://dynamsoft.github.io/styleguide/style-guide.html):
     - brand orange  #FE8E14  (CTA / accent only)
     - brand gray    #323234  (headings, body copy)
     - grays         #606060 #999999 #CCCCCC #DDDDDD #F5F5F5
     - headings      Oswald        body copy  Open Sans

   The one departure from the other demos: the symbols on this page are drawn
   in the region colours rather than black on white, because the colour *is*
   the annotation. The palette is therefore the page's most important design
   decision — see the ROLE COLOURS block below.

   Only the page chrome is branded; the barcodes themselves are rendered
   black on white so they stay scannable. */

@import url('https://fonts.googleapis.com/css2?family=Open+Sans:wght@400;600;700&family=Oswald:wght@300;400;500&display=swap');

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Brand */
    --dy-orange: #fe8e14;
    --dy-orange-hover: #e07d0b;
    --dy-orange-tint: #fff8ee;
    --dy-orange-edge: #f6c893;

    /* Neutrals */
    --dy-gray-900: #323234;
    --dy-gray-700: #606060;
    --dy-gray-500: #999999;
    --dy-gray-300: #cccccc;
    --dy-gray-200: #dddddd;
    --dy-gray-100: #eeeeee;
    --dy-gray-50: #f5f5f5;

    /* Accent used for inline text links, so orange stays reserved for CTAs */
    --dy-link: #306877;
    --dy-link-hover: #27555f;

    /* Error state (validation / render failures) */
    --dy-error: #b3261e;
    --dy-error-tint: #fdf2f1;
    --dy-error-edge: #f0c9c6;

    --white: #ffffff;

    --font-heading: 'Oswald', 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    --font-body: 'Open Sans', 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'Courier New', Courier, monospace;

    --radius: 6px;
    --radius-sm: 4px;
    --shell: 1200px;

    /* ------------------------------------------------------------------
       ROLE COLOURS

       One colour per structural role, shared by every symbology, so "teal
       means a guard pattern" holds whether the reader is looking at EAN-13
       or ITF-14. The values come from the ROLES table in barcode-1d.js and
       are read back from there at render time — this list is the fallback
       for the legend before a symbol has been drawn.
       ------------------------------------------------------------------ */
    --role-quiet: #dfe4ea;
    --role-guard: #2f6f7e;
    --role-start: #1f7a4d;
    --role-stop: #a03d1f;
    --role-data: #2b5d9b;
    --role-check: #fe8e14;
    --role-pair: #7a4fbf;
    --role-bearer: #6b7280;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.65;
    color: var(--dy-gray-900);
    background: var(--white);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ---------------------------------------------------------------------------
   Corporate header — logo left, product name, orange trial CTA right
   --------------------------------------------------------------------------- */

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: var(--white);
    border-bottom: 1px solid var(--dy-gray-200);
}

.site-header-inner {
    max-width: var(--shell);
    margin: 0 auto;
    padding: 0 1.5rem;
    min-height: 68px;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.brand {
    display: inline-flex;
    align-items: center;
    flex: 0 0 auto;
    text-decoration: none;
    border-radius: var(--radius-sm);
}

.brand-logo {
    display: block;
    height: 26px;
    width: auto;
}

.brand-divider {
    width: 1px;
    height: 26px;
    background: var(--dy-gray-200);
}

.brand-product {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 400;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--dy-gray-700);
    white-space: nowrap;
}

.brand-tag {
    display: inline-block;
    margin-right: 8px;
    padding: 1px 7px 2px;
    border: 1px solid rgba(254, 142, 20, 0.55);
    border-radius: 4px;
    background: rgba(254, 142, 20, 0.14);
    color: var(--dy-orange, #fe8e14);
    font-family: var(--font-heading);
    font-size: 0.68rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    vertical-align: 0.1em;
}

.header-nav {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

/* Scoped to .nav-link so it never overrides the CTA button's own colors. */
.header-nav .nav-link {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--dy-gray-700);
    text-decoration: none;
    white-space: nowrap;
}

.header-nav .nav-link:hover {
    color: var(--dy-orange);
}

/* ---------------------------------------------------------------------------
   Page intro
   --------------------------------------------------------------------------- */

/* NOTE: body is a column flex container (to pin the footer to the bottom), and
   a flex item with `margin: auto` on the cross axis loses `align-items:
   stretch` — it shrinks to its content width instead of filling the row. Every
   centered shell below therefore needs an explicit `width: 100%` so that
   `max-width` + `margin: 0 auto` still centers a full-width block. */

.page-intro {
    width: 100%;
    max-width: var(--shell);
    margin: 0 auto;
    padding: 3rem 1.5rem 2.25rem;
}

.page-intro h1 {
    font-family: var(--font-heading);
    font-size: clamp(1.9rem, 4vw, 2.5rem);
    font-weight: 400;
    line-height: 1.2;
    color: var(--dy-gray-900);
    margin-bottom: 0.75rem;
}

.page-intro p {
    font-size: 1.0625rem;
    color: var(--dy-gray-700);
    max-width: 68ch;
}

/* ---------------------------------------------------------------------------
   Tip / notice callout
   --------------------------------------------------------------------------- */

.notice-banner {
    width: 100%;
    max-width: var(--shell);
    margin: 0 auto 2.5rem;
    padding: 1rem 1.25rem;
    background: var(--dy-orange-tint);
    border: 1px solid var(--dy-orange-edge);
    border-left: 4px solid var(--dy-orange);
    border-radius: var(--radius-sm);
    color: var(--dy-gray-900);
    font-size: 0.9rem;
    line-height: 1.6;
    display: flex;
    gap: 0.75rem;
}

.notice-banner svg {
    flex: 0 0 auto;
    width: 20px;
    height: 20px;
    margin-top: 1px;
    color: var(--dy-orange-hover);
}

.notice-banner strong {
    display: block;
    font-weight: 700;
    margin-bottom: 0.15rem;
}

/* ---------------------------------------------------------------------------
   Layout
   --------------------------------------------------------------------------- */

.container {
    width: 100%;
    max-width: var(--shell);
    margin: 0 auto;
    padding: 0 1.5rem;
    flex: 1 0 auto;
}

.card {
    background: var(--white);
    border: 1px solid var(--dy-gray-200);
    border-radius: var(--radius);
    margin-bottom: 2rem;
    overflow: hidden;
}

.card-header {
    padding: 1.15rem 1.5rem 0.9rem;
    background: var(--dy-gray-50);
    border-bottom: 1px solid var(--dy-gray-200);
}

.card-header h2 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 400;
    letter-spacing: 0.01em;
    color: var(--dy-gray-900);
    padding-bottom: 0.6rem;
    position: relative;
}

.card-header h2::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 32px;
    height: 2px;
    background: var(--dy-orange);
}

.card-body {
    padding: 1.75rem 1.5rem;
}

.card-body p {
    margin-bottom: 0.9rem;
}

.card-body p:last-child {
    margin-bottom: 0;
}

/* ---------------------------------------------------------------------------
   Forms
   --------------------------------------------------------------------------- */

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
    gap: 1.25rem;
    margin-bottom: 1.25rem;
}

.form-row--value {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    margin-top: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.form-group--action {
    justify-content: flex-end;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--dy-gray-900);
    margin-bottom: 0.4rem;
    display: block;
}

.form-control {
    width: 100%;
    padding: 0.65rem 0.8rem;
    font-size: 0.95rem;
    font-family: inherit;
    color: var(--dy-gray-900);
    background: var(--white);
    border: 1px solid var(--dy-gray-300);
    border-radius: var(--radius-sm);
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
    min-width: 0;
}

.form-control:hover {
    border-color: var(--dy-gray-500);
}

.form-control:focus {
    outline: none;
    border-color: var(--dy-orange);
    box-shadow: 0 0 0 3px rgba(254, 142, 20, 0.18);
}

#valueInput {
    font-family: var(--font-mono);
    font-size: 1rem;
    letter-spacing: 0.02em;
}

select.form-control {
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23606060' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.7rem center;
    background-size: 1.15rem;
    padding-right: 2.4rem;
    appearance: none;
}

/* ---------------------------------------------------------------------------
   Buttons — orange solid for the primary action, outlined for the rest
   --------------------------------------------------------------------------- */

.button-group {
    display: flex;
    gap: 0.75rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.btn {
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    padding: 0.8rem 1.6rem;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    text-decoration: none;
    white-space: nowrap;
    transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.btn svg {
    flex: 0 0 auto;
    width: 1.05em;
    height: 1.05em;
}

.btn:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px rgba(254, 142, 20, 0.35);
}

.btn-primary {
    background: var(--dy-orange);
    color: var(--white);
}

.btn-primary:hover {
    background: var(--dy-orange-hover);
}

.btn-secondary {
    background: var(--white);
    color: var(--dy-gray-900);
    border-color: var(--dy-gray-300);
}

.btn-secondary:hover {
    background: var(--dy-gray-50);
    border-color: var(--dy-gray-900);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.88rem;
}

/* ---------------------------------------------------------------------------
   Validation / render errors
   --------------------------------------------------------------------------- */

.form-error {
    margin-top: 1.25rem;
    padding: 0.9rem 1.1rem;
    background: var(--dy-error-tint);
    border: 1px solid var(--dy-error-edge);
    border-left: 4px solid var(--dy-error);
    border-radius: var(--radius-sm);
    color: var(--dy-error);
    font-size: 0.9rem;
    line-height: 1.55;
    display: none;
}

.form-error.is-visible {
    display: block;
}

/* ---------------------------------------------------------------------------
   Symbology tabs
   --------------------------------------------------------------------------- */

.symbology-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    border-bottom: 1px solid var(--dy-gray-200);
    flex-wrap: wrap;
}

.symbology-tab {
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--dy-gray-700);
    background: transparent;
    border: 1px solid transparent;
    border-bottom: 2px solid transparent;
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    padding: 0.7rem 1.1rem;
    margin-bottom: -1px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.15s ease, background-color 0.15s ease, border-color 0.15s ease;
}

.symbology-tab .tab-kind {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    color: var(--dy-gray-500);
    border: 1px solid var(--dy-gray-300);
    border-radius: 3px;
    padding: 0 4px;
    line-height: 1.5;
}

.symbology-tab:hover {
    color: var(--dy-gray-900);
    background: var(--dy-gray-50);
}

.symbology-tab[aria-selected="true"] {
    color: var(--dy-gray-900);
    border-bottom-color: var(--dy-orange);
}

.symbology-tab[aria-selected="true"] .tab-kind {
    color: var(--dy-orange-hover);
    border-color: var(--dy-orange-edge);
    background: var(--dy-orange-tint);
}

.symbology-tab:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px rgba(254, 142, 20, 0.35);
}

/* Facts strip under the tabs: the handful of numbers that describe this
   symbol, all read back from the encoder. */
.symbology-facts {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.fact-chip {
    display: inline-flex;
    align-items: baseline;
    gap: 0.35rem;
    padding: 0.3rem 0.65rem;
    background: var(--dy-gray-50);
    border: 1px solid var(--dy-gray-200);
    border-radius: 50px;
    font-size: 0.8rem;
    color: var(--dy-gray-700);
}

.fact-chip b {
    font-weight: 700;
    color: var(--dy-gray-900);
    font-variant-numeric: tabular-nums;
}

/* ---------------------------------------------------------------------------
   Diagram toolbar: legend + toggles
   --------------------------------------------------------------------------- */

.diagram-instructions {
    font-size: 0.9rem;
    color: var(--dy-gray-700);
    margin-bottom: 1rem;
}

.diagram-toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1rem;
}

.legend {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem 0.9rem;
    align-items: center;
}

.legend-item {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.8rem;
    color: var(--dy-gray-700);
    cursor: pointer;
    border: 1px solid transparent;
    border-radius: 50px;
    padding: 0.15rem 0.5rem 0.15rem 0.35rem;
    background: transparent;
    font-family: inherit;
    transition: background-color 0.12s ease, border-color 0.12s ease;
}

.legend-item:hover {
    background: var(--dy-gray-50);
    border-color: var(--dy-gray-200);
}

.legend-item.is-active {
    background: var(--dy-orange-tint);
    border-color: var(--dy-orange-edge);
    color: var(--dy-gray-900);
    font-weight: 600;
}

.legend-swatch {
    width: 12px;
    height: 12px;
    border-radius: 3px;
    flex: 0 0 auto;
    border: 1px solid rgba(50, 50, 52, 0.18);
}

.legend-count {
    color: var(--dy-gray-500);
    font-variant-numeric: tabular-nums;
}

.diagram-toggles {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem 1rem;
}

.toggle-row {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    color: var(--dy-gray-700);
    cursor: pointer;
    white-space: nowrap;
}

/* `display: inline-flex` outranks the UA rule for [hidden], so the attribute
   has to be re-asserted or the row stays visible with its attribute set. */
.toggle-row[hidden] {
    display: none;
}

.range-check {
    width: 17px;
    height: 17px;
    accent-color: var(--dy-orange);
    cursor: pointer;
    flex: 0 0 auto;
}

/* ---------------------------------------------------------------------------
   The diagram stage
   --------------------------------------------------------------------------- */

.diagram-stage {
    position: relative;
    width: 100%;
    background: var(--white);
    border: 1px solid var(--dy-gray-200);
    border-radius: var(--radius-sm);
    padding: 1.25rem;
    overflow-x: auto;
}

/* A grid symbol is square and should not be stretched to the full width of a
   desktop card — at 177 modules a QR Code is 177 x 177 and the module ruler
   needs every one of those pixels. */
.diagram-stage--grid {
    display: flex;
    justify-content: center;
    background: var(--dy-gray-50);
}

.diagram {
    display: block;
    max-width: 100%;
    height: auto;
    touch-action: manipulation;
}

.diagram-stage--grid .diagram {
    width: min(620px, 100%);
}

/* Hit areas are transparent rects over each region: the visible geometry is
   drawn once, and interaction is handled by these, so hover states never have
   to restyle thousands of bar rects. */
.region-hit {
    fill: transparent;
    cursor: pointer;
    outline: none;
}

.region-hit:focus-visible {
    stroke: var(--dy-gray-900);
    stroke-width: 2;
    stroke-dasharray: 4 3;
}

/* Hover = a light wash; selection = a stronger one plus an outline. Keeping
   the two visually distinct means a pinned region is still recognisable while
   the pointer moves around. */
.region-highlight {
    pointer-events: none;
    fill: var(--dy-gray-900);
    opacity: 0;
    transition: opacity 0.12s ease;
}

.region-highlight.is-hover {
    opacity: 0.1;
}

.region-highlight.is-selected {
    opacity: 0.16;
}

.region-outline {
    pointer-events: none;
    fill: none;
    stroke: var(--dy-gray-900);
    stroke-width: 1.5;
    opacity: 0;
}

.region-outline.is-selected {
    opacity: 0.75;
}

.diagram.is-dimmed .region-marks {
    opacity: 0.35;
}

.region-marks {
    transition: opacity 0.12s ease;
}

.diagram text {
    font-family: var(--font-body);
    fill: var(--dy-gray-900);
    user-select: none;
}

.diagram .hri-text {
    font-family: var(--font-mono);
    font-size: 11px;
    text-anchor: middle;
}

.diagram .hri-text--outside {
    font-size: 12px;
}

.diagram .ruler-text {
    font-size: 7px;
    fill: var(--dy-gray-500);
    text-anchor: middle;
    font-variant-numeric: tabular-nums;
}

.diagram .axis-text {
    font-size: 9px;
    fill: var(--dy-gray-500);
}

.diagram .group-divider {
    stroke: var(--dy-gray-300);
    stroke-width: 0.5;
    stroke-dasharray: 3 3;
}

.diagram .bearer-bar {
    fill: none;
    stroke: var(--dy-gray-700);
    stroke-width: 5;
}

.diagram .bearer-label {
    font-size: 9px;
    fill: var(--dy-gray-700);
}

/* A quiet zone is empty by definition, so it is drawn as a hatched band: the
   reader has to be able to see that something is deliberately there. */
.quiet-hatch {
    fill: url(#quietPattern);
}

/* ---------------------------------------------------------------------------
   Module readout — the "which module am I on" strip under the diagram
   --------------------------------------------------------------------------- */

.module-readout {
    margin-top: 1rem;
    padding: 0.6rem 0.85rem;
    background: var(--dy-gray-50);
    border: 1px solid var(--dy-gray-200);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    color: var(--dy-gray-700);
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem 1.25rem;
    align-items: baseline;
    min-height: 2.4rem;
}

.module-readout b {
    color: var(--dy-gray-900);
    font-weight: 700;
}

.module-readout .readout-mono {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    word-break: break-all;
}

/* ---------------------------------------------------------------------------
   Detail panel
   --------------------------------------------------------------------------- */

.detail-panel {
    margin-top: 1.25rem;
    border: 1px solid var(--dy-gray-200);
    border-left: 4px solid var(--dy-gray-300);
    border-radius: var(--radius-sm);
    padding: 1.1rem 1.25rem;
    background: var(--white);
    min-height: 5.5rem;
}

.detail-panel.is-pinned {
    border-left-color: var(--dy-orange);
    background: #fffdfa;
}

.detail-empty {
    font-size: 0.9rem;
    color: var(--dy-gray-500);
    font-style: italic;
}

.detail-head {
    display: flex;
    gap: 0.7rem;
    align-items: flex-start;
    margin-bottom: 0.6rem;
}

.detail-swatch {
    flex: 0 0 auto;
    width: 16px;
    height: 16px;
    border-radius: 4px;
    margin-top: 5px;
    border: 1px solid rgba(50, 50, 52, 0.18);
    background: var(--dy-gray-300);
}

.detail-title {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 400;
    line-height: 1.3;
    color: var(--dy-gray-900);
}

.detail-role {
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--dy-gray-500);
}

.detail-description {
    font-size: 0.95rem;
    color: var(--dy-gray-900);
    margin-bottom: 0.5rem;
}

.detail-detail {
    font-size: 0.9rem;
    color: var(--dy-gray-700);
    margin-bottom: 0.75rem;
}

.detail-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 0.5rem 1.25rem;
    margin: 0;
    padding-top: 0.75rem;
    border-top: 1px solid var(--dy-gray-200);
}

.detail-stats div {
    min-width: 0;
}

.detail-stats dt {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--dy-gray-500);
}

.detail-stats dd {
    margin: 0;
    font-size: 0.88rem;
    color: var(--dy-gray-900);
    word-break: break-word;
}

.detail-stats dd.mono {
    font-family: var(--font-mono);
    font-size: 0.82rem;
}

/* ---------------------------------------------------------------------------
   Tables
   --------------------------------------------------------------------------- */

.table-scroll {
    width: 100%;
    overflow-x: auto;
    margin-top: 0.5rem;
}

.spec-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.spec-table caption {
    caption-side: top;
    text-align: left;
    font-family: var(--font-heading);
    font-size: 1rem;
    color: var(--dy-gray-900);
    padding-bottom: 0.6rem;
}

.spec-table th,
.spec-table td {
    text-align: left;
    padding: 0.6rem 0.75rem;
    border-bottom: 1px solid var(--dy-gray-200);
    vertical-align: top;
}

.spec-table thead th {
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--dy-gray-700);
    background: var(--dy-gray-50);
    border-bottom: 1px solid var(--dy-gray-300);
    white-space: nowrap;
}

.spec-table tbody tr:last-child td {
    border-bottom: none;
}

.spec-table td:first-child {
    font-weight: 600;
}

.spec-table td.kind {
    color: var(--dy-gray-700);
    white-space: nowrap;
}

.spec-table code {
    font-family: var(--font-mono);
    font-size: 0.85em;
    background: var(--dy-gray-50);
    border: 1px solid var(--dy-gray-200);
    border-radius: 3px;
    padding: 1px 5px;
}

/* Region table: colour chip, name, role, modules, description */
.region-table td:first-child {
    white-space: nowrap;
}

.region-table tr.is-active {
    background: var(--dy-orange-tint);
}

.region-table .region-chip {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 3px;
    margin-right: 0.5rem;
    vertical-align: 0;
    border: 1px solid rgba(50, 50, 52, 0.18);
}

.region-table .region-modules {
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
    font-weight: 600;
}

.region-table .region-role {
    color: var(--dy-gray-700);
    white-space: nowrap;
}

.region-table .region-link {
    font-family: inherit;
    font-size: inherit;
    font-weight: 600;
    color: var(--dy-link);
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
    text-align: left;
    text-decoration: underline;
    text-underline-offset: 2px;
}

.region-table .region-link:hover {
    color: var(--dy-link-hover);
}

/* Character table: patterns are monospace and must not wrap mid-pattern */
.character-table td.pattern-cell,
.character-table td.mono-cell {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    white-space: nowrap;
}

.character-table td.pattern-cell .bit-1 {
    color: var(--dy-gray-900);
    font-weight: 700;
}

.character-table td.pattern-cell .bit-0 {
    color: var(--dy-gray-300);
}

.character-table .char-cell {
    font-family: var(--font-mono);
    font-weight: 700;
    white-space: nowrap;
}

.character-table .wide-marker {
    display: inline-block;
    width: 1.5em;
    text-align: center;
}

.compare-table td:first-child {
    white-space: nowrap;
}

.compare-table td {
    min-width: 180px;
}

/* ---------------------------------------------------------------------------
   QR specifics
   --------------------------------------------------------------------------- */

.qr-controls {
    max-width: 420px;
    margin-bottom: 1.25rem;
}

.qr-stats {
    margin-bottom: 1.25rem;
    padding-top: 0;
    border-top: none;
}

/* ---------------------------------------------------------------------------
   Steps list
   --------------------------------------------------------------------------- */

.steps {
    margin: 1rem 0 1.25rem;
    padding-left: 1.4rem;
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
}

.steps li {
    font-size: 0.95rem;
    color: var(--dy-gray-900);
    line-height: 1.6;
}

.steps strong {
    font-weight: 700;
}

/* ---------------------------------------------------------------------------
   Check-value arithmetic
   --------------------------------------------------------------------------- */

.check-calc {
    margin: 1rem 0;
    padding: 1rem 1.15rem;
    background: var(--dy-gray-50);
    border: 1px solid var(--dy-gray-200);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.9;
    overflow-x: auto;
}

.check-calc .calc-row {
    white-space: nowrap;
}

.check-calc .calc-label {
    display: inline-block;
    min-width: 8.5em;
    color: var(--dy-gray-700);
    font-family: var(--font-body);
    font-size: 0.8rem;
    font-weight: 600;
}

.check-calc .calc-em {
    font-weight: 700;
    color: var(--dy-gray-900);
}

.weight-strip {
    display: inline-flex;
    gap: 2px;
    margin: 0.2rem 0;
    flex-wrap: wrap;
}

.weight-cell {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    min-width: 1.6em;
    line-height: 1.35;
}

.weight-cell span:first-child {
    font-family: var(--font-mono);
    font-weight: 700;
}

.weight-cell span:last-child {
    font-size: 0.7rem;
    color: var(--dy-gray-500);
    font-family: var(--font-body);
}

.weight-cell.is-check {
    color: var(--dy-orange-hover);
}

.weight-cell.is-check span:last-child {
    color: var(--dy-orange-hover);
}

/* ---------------------------------------------------------------------------
   Hints and inline copy
   --------------------------------------------------------------------------- */

.hint {
    font-size: 0.85rem;
    color: var(--dy-gray-700);
    margin-top: 0.75rem;
    line-height: 1.6;
}

.hint.is-error {
    color: var(--dy-error);
}

.hint code,
.card-body code {
    font-family: var(--font-mono);
    font-size: 0.85em;
    background: var(--dy-gray-50);
    border: 1px solid var(--dy-gray-200);
    border-radius: 3px;
    padding: 1px 5px;
}

a {
    color: var(--dy-link);
    text-decoration: underline;
    text-underline-offset: 2px;
}

a:hover {
    color: var(--dy-link-hover);
}

.hint a {
    font-weight: 600;
}

/* ---------------------------------------------------------------------------
   Footer
   --------------------------------------------------------------------------- */

.demo-footer {
    flex: 0 0 auto;
    margin-top: 3rem;
    background: var(--dy-gray-50);
    border-top: 1px solid var(--dy-gray-200);
    padding: 2rem 1.5rem;
}

.demo-footer-inner {
    max-width: var(--shell);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.demo-footer .disclaimer {
    font-size: 0.85rem;
    color: var(--dy-gray-700);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.demo-footer .disclaimer svg {
    flex: 0 0 auto;
    width: 16px;
    height: 16px;
    color: var(--dy-orange-hover);
}

.demo-footer .footer-links {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem 1.25rem;
    font-size: 0.9rem;
    color: var(--dy-gray-700);
}

.demo-footer .footer-cta {
    margin-left: auto;
}

/* ---------------------------------------------------------------------------
   Responsive
   --------------------------------------------------------------------------- */

@media (max-width: 900px) {
    .header-nav .nav-link {
        display: none;
    }

    .header-nav {
        gap: 0;
    }

    .diagram-toolbar {
        flex-direction: column;
        align-items: stretch;
    }
}

@media (max-width: 768px) {
    .page-intro {
        padding: 2rem 1rem 1.5rem;
    }

    .symbology-tabs {
        overflow-x: auto;
        gap: 0.25rem;
        scrollbar-width: none;
        flex-wrap: nowrap;
    }

    .symbology-tabs::-webkit-scrollbar {
        display: none;
    }

    .symbology-tab {
        flex: 0 0 auto;
        padding: 0.65rem 0.8rem;
        font-size: 0.9rem;
    }

    .container {
        padding: 0 1rem;
    }

    .card-body {
        padding: 1.25rem 1rem;
    }

    .card-header {
        padding: 1rem 1rem 0.75rem;
    }

    .form-row,
    .form-row--value {
        grid-template-columns: 1fr;
        gap: 1rem;
        margin-bottom: 1rem;
    }

    .form-group--action .btn {
        width: 100%;
    }

    .diagram-stage {
        padding: 0.75rem;
    }

    .detail-stats {
        grid-template-columns: 1fr 1fr;
    }

    .demo-footer .footer-cta {
        margin-left: 0;
    }

    .spec-table {
        font-size: 0.82rem;
    }

    .spec-table th,
    .spec-table td {
        padding: 0.5rem 0.5rem;
    }

    .compare-table td {
        min-width: 150px;
    }
}

@media (max-width: 480px) {
    .page-intro h1 {
        font-size: 1.6rem;
    }

    .brand-tag,
    .brand-product,
    .brand-divider {
        display: none;
    }

    .card-header h2 {
        font-size: 1.05rem;
    }

    .form-control {
        font-size: 0.9rem;
    }

    .btn {
        padding: 0.75rem 1.25rem;
        font-size: 0.9rem;
    }

    .detail-stats {
        grid-template-columns: 1fr;
    }
}

/* ---------------------------------------------------------------------------
   Print — the diagrams are the point, so they are kept and the chrome is not
   --------------------------------------------------------------------------- */

@media print {

    .site-header,
    .demo-footer,
    .diagram-toolbar,
    .form-error,
    .module-readout,
    .page-intro p,
    .symbology-tabs {
        display: none;
    }

    body {
        background: var(--white);
    }

    .card {
        break-inside: avoid;
    }

    .diagram-stage {
        border: none;
        padding: 0;
        overflow: visible;
    }
}