/* ===========================================================================
   QR Error Correction Visualizer — Codepool demo styles.

   Same light surface and brand tokens as the other Codepool tool pages
   (copied from demos/barcode-parameter-tuner/styles.css, which itself copies
   driver-license-generator):

     brand orange  #FE8E14   CTA and accent only, never body copy or links
     brand gray    #323234   headings and body
     Blumine       #306877   inline text links
     headings      Oswald        body copy  Open Sans

   The shell (header, intro, cards, controls, buttons, footer) is the house
   pattern; everything from "Symbol stage" down is specific to this page.
   =========================================================================== */

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

: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;

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

    --white: #ffffff;

    /* Structure view */
    --role-data: #ffffff;
    --role-ec: rgba(254, 142, 20, 0.16);
    --role-ec-edge: rgba(254, 142, 20, 0.55);
    --role-function: rgba(48, 104, 119, 0.13);
    --role-damaged: rgba(180, 35, 24, 0.16);
    --damaged-ink: #b42318;

    --ok: #1a7f37;
    --bad: #b42318;

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

    --radius: 6px;
    --radius-sm: 4px;
    --shell: 1400px;
}

* {
    box-sizing: border-box;
}

/* The `hidden` attribute has to win: the UA sheet's rule is a user-agent rule,
   so any author rule that sets `display` beats it. Stated once so no element
   added later has to remember that its own `display` would cancel the
   attribute. */
[hidden] {
    display: none !important;
}

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;
    margin: 0;
}

h1,
h2,
h3 {
    margin: 0;
}

p {
    margin: 0;
}

ul,
ol {
    margin: 0;
    padding: 0;
    list-style: none;
}

/* ---------------------------------------------------------------------------
   Site header
   --------------------------------------------------------------------------- */

.site-header {
    width: 100%;
    background: var(--white);
    border-bottom: 1px solid var(--dy-gray-200);
}

.site-header-inner {
    max-width: var(--shell);
    margin: 0 auto;
    padding: 0.85rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.9rem;
}

.brand {
    display: inline-flex;
    align-items: center;
    flex: 0 0 auto;
    text-decoration: none;
}

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

.brand-divider {
    width: 1px;
    height: 26px;
    background: var(--dy-gray-200);
    flex: 0 0 auto;
}

.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);
    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;
}

.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
   --------------------------------------------------------------------------- */

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

.page-intro h1 {
    font-family: var(--font-heading);
    font-size: clamp(1.75rem, 3.4vw, 2.35rem);
    font-weight: 400;
    line-height: 1.2;
    color: var(--dy-gray-900);
    margin-bottom: 0.6rem;
}

.page-intro p {
    font-size: 1.0625rem;
    color: var(--dy-gray-700);
    max-width: 84ch;
}

.page-intro .page-intro-lead {
    max-width: 76ch;
}

.learning-workflow {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.75rem;
    margin-top: 1rem;
    padding: 0;
    list-style: none;
    counter-reset: learning-step;
}

.learning-workflow li {
    position: relative;
    min-width: 0;
    border-left: 2px solid var(--dy-orange);
    padding: 0.25rem 0.75rem 0.25rem 2.1rem;
    counter-increment: learning-step;
}

.learning-workflow li::before {
    content: counter(learning-step);
    position: absolute;
    left: 0.65rem;
    top: 0.15rem;
    color: var(--dy-orange-hover);
    font-family: var(--font-mono);
    font-weight: 700;
}

.learning-workflow strong,
.learning-workflow span {
    display: block;
}

.learning-workflow strong {
    font-size: 0.86rem;
}

.learning-workflow span {
    margin-top: 0.15rem;
    color: var(--dy-gray-700);
    font-size: 0.8rem;
    line-height: 1.45;
}

/* ---------------------------------------------------------------------------
   Shell, cards
   --------------------------------------------------------------------------- */

.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: 1.5rem;
    overflow: hidden;
}

.card-header {
    padding: 1rem 1.25rem 0.75rem;
    background: var(--dy-gray-50);
    border-bottom: 1px solid var(--dy-gray-200);
    display: flex;
    align-items: baseline;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.card-header h2 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 400;
    letter-spacing: 0.01em;
    color: var(--dy-gray-900);
    padding-bottom: 0.5rem;
    position: relative;
}

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

.card-header .card-note {
    margin-left: auto;
    font-size: 0.82rem;
    color: var(--dy-gray-700);
}

.card-body {
    padding: 1.25rem;
}

/* ---------------------------------------------------------------------------
   Controls
   --------------------------------------------------------------------------- */

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

.form-group > label,
.label-text {
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--dy-gray-700);
    margin-bottom: 0.35rem;
    display: block;
}

.form-control,
.form-input,
.form-select,
textarea {
    width: 100%;
    padding: 0.5rem 0.65rem;
    font-size: 0.92rem;
    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;
}

textarea {
    resize: vertical;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.5;
}

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

.form-select:focus,
textarea:focus,
input[type="range"]:focus {
    outline: none;
    border-color: var(--dy-orange);
    box-shadow: 0 0 0 3px rgba(254, 142, 20, 0.18);
}

select.form-select {
    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 0.55rem center;
    background-size: 1rem;
    padding-right: 2rem;
    appearance: none;
}

.btn {
    font-family: inherit;
    font-size: 0.92rem;
    line-height: 1.2;
    font-weight: 600;
    white-space: nowrap;
    min-height: 40px;
    padding: 0.25rem 1.15rem;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    text-decoration: none;
    transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.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:not(:disabled) {
    background: var(--dy-orange-hover);
}

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

.btn-secondary:hover:not(:disabled) {
    background: var(--dy-gray-50);
    border-color: var(--dy-gray-900);
}

.btn-sm {
    font-size: 0.8rem;
    line-height: 1.2;
    white-space: nowrap;
    min-height: 32px;
    padding: 0.15rem 0.7rem;
}

.btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.hint {
    font-size: 0.82rem;
    color: var(--dy-gray-700);
    line-height: 1.55;
}

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

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

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;
}

.error-line {
    margin-top: 0.6rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--bad);
}

/* ---------------------------------------------------------------------------
   Workspace layout
   --------------------------------------------------------------------------- */

.workspace {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    gap: 1.25rem;
    align-items: start;
    margin-top: 0.5rem;
}

.workspace > .card,
.side-column > .card {
    min-width: 0;
}

.side-column {
    display: flex;
    flex-direction: column;
    gap: 0;
}

/* ---------------------------------------------------------------------------
   Symbol toolbar (payload / level / version)
   --------------------------------------------------------------------------- */

/* Flex with wrapping, not a grid: at narrow window widths the version select
   must wrap to its own row, never overlap the level buttons. */
.symbol-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem 1.25rem;
    align-items: flex-start;
}

.symbol-toolbar > .form-group:first-child {
    flex: 1 1 230px;
    min-width: 200px;
}

.symbol-toolbar .ec-group {
    flex: 0 0 auto;
}

.symbol-toolbar > .form-group:last-child {
    flex: 1 1 170px;
    max-width: 240px;
}

.ec-segmented {
    display: flex;
    border: 1px solid var(--dy-gray-300);
    border-radius: var(--radius-sm);
    overflow: hidden;
    width: fit-content;
}

.ec-option {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    font-weight: 700;
    padding: 0.45rem 0.7rem;
    min-height: 40px;
    white-space: nowrap;
    border: 0;
    border-right: 1px solid var(--dy-gray-300);
    background: var(--white);
    color: var(--dy-gray-700);
    cursor: pointer;
    transition: background-color 0.15s ease, color 0.15s ease;
}

.ec-option:last-child {
    border-right: 0;
}

.ec-option:hover {
    background: var(--dy-gray-50);
}

.ec-option[aria-checked="true"] {
    background: var(--dy-orange);
    border-color: var(--dy-orange);
    color: var(--white);
}

/* ---------------------------------------------------------------------------
   Symbol stage: print canvas + structure overlay
   --------------------------------------------------------------------------- */

.symbol-stage-row {
    display: grid;
    grid-template-columns: auto minmax(260px, 1fr);
    gap: 1.5rem;
    align-items: start;
    margin-top: 1rem;
}

.qr-stage {
    position: relative;
    display: inline-block;
    padding: 10px;
    background: var(--white);
    border: 1px solid var(--dy-gray-200);
    border-radius: var(--radius-sm);
    line-height: 0;
}

#qr-canvas {
    display: block;
    width: min(360px, 100%);
    height: auto;
    image-rendering: pixelated;
    cursor: crosshair;
    touch-action: none;
}

.qr-overlay {
    position: absolute;
    left: 10px;
    top: 10px;
    width: min(360px, calc(100% - 20px));
    height: auto;
    pointer-events: none;
}

.stage-hint {
    position: absolute;
    left: 50%;
    bottom: -1.9rem;
    transform: translateX(-50%);
    font-size: 0.75rem;
    color: var(--dy-gray-500);
    white-space: nowrap;
    line-height: 1.4;
}

.symbol-side {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    min-width: 0;
}

.legend {
    border: 1px solid var(--dy-gray-200);
    border-radius: var(--radius-sm);
    padding: 0.75rem 0.9rem;
    background: var(--dy-gray-50);
}

.structure-toggle {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--dy-gray-900);
    cursor: pointer;
}

.structure-toggle input {
    accent-color: var(--dy-orange);
    margin: 0;
}

.legend-items {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.3rem 0.9rem;
    margin-top: 0.6rem;
    font-size: 0.78rem;
    color: var(--dy-gray-700);
}

.legend-items li {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    min-width: 0;
}

.swatch {
    width: 12px;
    height: 12px;
    border-radius: 2px;
    border: 1px solid var(--dy-gray-300);
    flex: 0 0 auto;
}

.swatch-data {
    background: var(--role-data);
}

.swatch-ec {
    background: var(--role-ec);
    border-color: var(--role-ec-edge);
}

.swatch-function {
    background: var(--role-function);
    border-color: rgba(48, 104, 119, 0.4);
}

.swatch-damaged {
    background: var(--role-damaged);
    border-color: rgba(180, 35, 24, 0.55);
}

.codeword-info {
    margin-top: 0.6rem;
    font-size: 0.78rem;
    font-family: var(--font-mono);
    color: var(--dy-gray-700);
    line-height: 1.5;
    overflow-wrap: anywhere;
}

.facts {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0.28rem 0.9rem;
    margin: 0;
    font-size: 0.82rem;
}

.facts dt {
    color: var(--dy-gray-700);
    font-weight: 600;
    white-space: nowrap;
}

.facts dd {
    margin: 0;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    overflow-wrap: anywhere;
}

.ec-compare {
    border: 1px solid var(--dy-gray-200);
    border-radius: var(--radius-sm);
    padding: 0.75rem 0.9rem;
}

.ec-bars {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    margin: 0.5rem 0 0.6rem;
}

.ec-bar-row {
    display: grid;
    grid-template-columns: 1.4rem 1fr auto;
    gap: 0.5rem;
    align-items: center;
    font-size: 0.78rem;
    cursor: pointer;
    border: 0;
    background: none;
    padding: 0.15rem 0.2rem;
    border-radius: var(--radius-sm);
    text-align: left;
    font-family: inherit;
    color: var(--dy-gray-900);
    width: 100%;
}

.ec-bar-row:hover {
    background: var(--dy-gray-50);
}

.ec-bar-row[aria-current="true"] {
    background: var(--dy-orange-tint);
    box-shadow: inset 0 0 0 1px var(--dy-orange-edge);
}

.ec-bar-level {
    font-family: var(--font-mono);
    font-weight: 700;
}

.ec-bar-track {
    position: relative;
    height: 10px;
    background: var(--dy-gray-100);
    border-radius: 999px;
    overflow: hidden;
}

.ec-bar-fill {
    position: absolute;
    inset: 0 auto 0 0;
    background: var(--dy-orange);
    border-radius: 999px;
}

.ec-bar-row[aria-current="true"] .ec-bar-fill {
    background: var(--dy-orange-hover);
}

.ec-bar-note {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--dy-gray-700);
    white-space: nowrap;
}

.symbol-actions {
    display: flex;
    gap: 0.5rem;
}

/* ---------------------------------------------------------------------------
   Damage tools
   --------------------------------------------------------------------------- */

.tool-row {
    padding: 0.7rem 0;
    border-top: 1px solid var(--dy-gray-100);
}

.tool-row:first-child {
    border-top: 0;
    padding-top: 0;
}

.tool-row .hint {
    margin-top: 0.35rem;
}

.chip-row {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
    align-items: center;
}

.chip {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 700;
    min-height: 32px;
    min-width: 34px;
    padding: 0.15rem 0.6rem;
    border-radius: 999px;
    border: 1px solid var(--dy-gray-300);
    background: var(--white);
    color: var(--dy-gray-700);
    cursor: pointer;
    transition: background-color 0.15s ease, border-color 0.15s ease;
}

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

.chip[aria-checked="true"] {
    background: var(--dy-orange);
    border-color: var(--dy-orange);
    color: var(--white);
}

.slider-row {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    flex-wrap: wrap;
}

.slider-row .form-select {
    width: auto;
    min-width: 180px;
    flex: 1 1 180px;
}

.slider-row input[type="range"] {
    flex: 1 1 120px;
    min-width: 100px;
    accent-color: var(--dy-orange);
}

.slider-row output {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--dy-gray-700);
    min-width: 3.2em;
    text-align: right;
}

/* Meter -------------------------------------------------------------------- */

.meter {
    margin-top: 0.9rem;
    padding: 0.85rem 0.95rem;
    border: 1px solid var(--dy-gray-200);
    border-radius: var(--radius-sm);
    background: var(--dy-gray-50);
}

.meter-head {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.meter-pct {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--dy-gray-900);
}

.meter-pct #damage-pct {
    color: var(--damaged-ink);
}

.budget-text {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--dy-gray-700);
    text-align: right;
}

.budget-bars {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    margin-top: 0.6rem;
}

.budget-row {
    display: grid;
    grid-template-columns: 4.6rem 1fr auto;
    gap: 0.55rem;
    align-items: center;
    font-size: 0.75rem;
    color: var(--dy-gray-700);
}

.budget-label {
    font-family: var(--font-mono);
    white-space: nowrap;
}

.budget-track {
    position: relative;
    height: 12px;
    background: var(--white);
    border: 1px solid var(--dy-gray-200);
    border-radius: 3px;
    overflow: hidden;
}

.budget-fill {
    position: absolute;
    inset: 0 auto 0 0;
    background: var(--damaged-ink);
    border-radius: 2px 0 0 2px;
    transition: width 0.2s ease;
}

.budget-cap {
    position: absolute;
    top: -1px;
    bottom: -1px;
    width: 2px;
    background: var(--dy-orange);
}

.budget-row.over .budget-cap {
    background: var(--bad);
}

.budget-row.over .budget-note {
    color: var(--bad);
    font-weight: 700;
}

.budget-note {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    white-space: nowrap;
}

.function-warn {
    margin-top: 0.6rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: #8b4f05;
    background: var(--dy-orange-tint);
    border: 1px solid var(--dy-orange-edge);
    border-radius: var(--radius-sm);
    padding: 0.45rem 0.65rem;
}

/* ---------------------------------------------------------------------------
   Decode panel
   --------------------------------------------------------------------------- */

.auto-decode {
    margin-left: auto;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--dy-gray-700);
    cursor: pointer;
}

.auto-decode input {
    accent-color: var(--dy-orange);
    margin: 0;
}

.status-line {
    font-size: 0.88rem;
    color: var(--dy-gray-700);
    overflow-wrap: anywhere;
}

.status-line.ok {
    color: var(--ok);
    font-weight: 600;
}

.status-line.bad {
    color: var(--bad);
    font-weight: 600;
}

.decode-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin: 0.7rem 0 0.9rem;
}

.log-wrap {
    border-top: 1px solid var(--dy-gray-100);
    padding-top: 0.7rem;
}

.log-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8rem;
}

.log-table th {
    text-align: left;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--dy-gray-500);
    font-weight: 700;
    padding: 0.25rem 0.5rem 0.35rem;
    border-bottom: 1px solid var(--dy-gray-200);
}

.log-table td {
    padding: 0.3rem 0.5rem;
    border-bottom: 1px solid var(--dy-gray-100);
    font-family: var(--font-mono);
    font-size: 0.76rem;
    white-space: nowrap;
}

.log-table td.result {
    font-weight: 700;
}

.log-table tr.result-ok td.result {
    color: var(--ok);
}

.log-table tr.result-bad td.result {
    color: var(--bad);
}

.log-table tr.result-mismatch td.result {
    color: #8b4f05;
}

.log-table td.source {
    font-family: var(--font-body);
    color: var(--dy-gray-700);
    white-space: normal;
}

/* ---------------------------------------------------------------------------
   QR anatomy card: per-region colored map + hover glossary
   --------------------------------------------------------------------------- */

.anatomy-body {
    display: grid;
    grid-template-columns: auto minmax(280px, 1fr);
    gap: 1.5rem;
    align-items: start;
}

.anatomy-stage {
    padding: 10px;
    background: var(--dy-gray-50);
    border: 1px solid var(--dy-gray-200);
    border-radius: var(--radius-sm);
    line-height: 0;
}

#anatomy-canvas {
    display: block;
    width: min(440px, 100%);
    height: auto;
    image-rendering: pixelated;
}

.anatomy-legend {
    display: flex;
    flex-direction: column;
    gap: 0;
    margin: 0;
}

.anatomy-term {
    display: grid;
    grid-template-columns: 14px 150px 1fr;
    gap: 0.55rem;
    align-items: baseline;
    padding: 0.5rem 0.45rem;
    border-top: 1px solid var(--dy-gray-100);
    border-radius: var(--radius-sm);
    cursor: default;
    transition: background-color 0.12s ease;
}

.anatomy-term:first-child {
    border-top: 0;
}

.anatomy-term:hover,
.anatomy-term.active {
    background: var(--dy-orange-tint);
}

.anatomy-term .swatch {
    align-self: center;
}

.anatomy-term dt {
    margin: 0;
    font-weight: 700;
    font-size: 0.8rem;
    color: var(--dy-gray-900);
}

.anatomy-term dd {
    margin: 0;
    font-size: 0.8rem;
    color: var(--dy-gray-700);
    line-height: 1.5;
}

/* ---------------------------------------------------------------------------
   Methodology + footer + toast
   --------------------------------------------------------------------------- */

.methodology {
    padding: 1rem 1.25rem;
    font-size: 0.9rem;
    color: var(--dy-gray-700);
}

.methodology summary {
    cursor: pointer;
    font-weight: 600;
    color: var(--dy-gray-900);
}

.methodology p {
    margin-top: 0.7rem;
    line-height: 1.6;
}

footer {
    margin-top: auto;
    padding: 1.5rem;
    text-align: center;
    border-top: 1px solid var(--dy-gray-200);
    font-size: 0.85rem;
    color: var(--dy-gray-700);
}

.toast {
    position: fixed;
    left: 50%;
    bottom: 2rem;
    transform: translateX(-50%);
    background: rgba(50, 50, 52, 0.92);
    color: #fff;
    font-size: 0.85rem;
    font-weight: 600;
    padding: 0.55rem 1.1rem;
    border-radius: 999px;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
}

.toast.show {
    opacity: 1;
}

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

@media (max-width: 1180px) {
    .symbol-stage-row {
        grid-template-columns: 1fr;
    }

    .qr-stage {
        justify-self: center;
    }
}

@media (max-width: 1020px) {
    .workspace {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 850px) {
    .learning-workflow {
        grid-template-columns: 1fr;
    }

    .anatomy-body {
        grid-template-columns: 1fr;
    }

    .anatomy-stage {
        justify-self: center;
    }

    .anatomy-term {
        grid-template-columns: 14px 130px 1fr;
    }

    .header-nav .nav-link {
        display: none;
    }

    .site-header-inner {
        flex-wrap: wrap;
    }

    .brand-product {
        white-space: normal;
    }

    .budget-row {
        grid-template-columns: 4.2rem 1fr;
    }

    .budget-note {
        grid-column: 2;
    }
}

@media (max-width: 480px) {

    .container,
    .page-intro {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .symbol-toolbar > .form-group {
        flex: 1 1 100%;
        max-width: none;
    }

    .brand-divider {
        display: none;
    }

    .legend-items {
        grid-template-columns: 1fr;
    }

    .header-nav {
        margin-left: 0;
    }
}

@media (prefers-reduced-motion: reduce) {
    .budget-fill {
        transition: none;
    }
}