:is(
    [data-unit-visual-extension="thermometer_equilibration_lab"],
    [data-unit-visual-extension="thermal_direction_selector"],
    [data-unit-visual-extension="thermometric_property_selector"],
    [data-unit-visual-extension="temperature_scale_selector"],
    [data-unit-visual-extension="specific_heat_capacity_lab"],
    [data-unit-visual-extension="phase_change_heating_lab"],
    [data-unit-visual-extension="energy_journey_selector"]
) {
    --ch14-ink: #153d4b;
    --ch14-muted: #647d87;
    --ch14-line: #91a7af;
    --ch14-surface: #f4f9fa;
    --ch14-hot: #c94e3d;
    --ch14-cool: #257ca3;
    --ch14-energy: #d27828;
    --ch14-property: #208265;
    --ch14-property-two: #7358a4;
    --ch14-neutral: #526f7b;
    width: 100%;
    min-width: 0;
    margin: clamp(1rem, 2.3vw, 1.65rem) 0;
    padding: clamp(0.88rem, 2.2vw, 1.3rem);
    border: 1px solid color-mix(in srgb, var(--ch14-property) 16%, transparent);
    border-radius: 1.2rem;
    background: linear-gradient(145deg, #fff 0%, var(--ch14-surface) 100%);
    color: var(--ch14-ink);
    box-shadow: 0 0.78rem 2rem rgb(21 61 75 / 0.06);
    overflow: clip;
}

.ch14-visual[data-unit-visual-extension] [hidden] {
    display: none !important;
}

.ch14-visual[data-unit-visual-extension] .ch14-visual-heading {
    display: grid;
    gap: 0.16rem;
    margin-bottom: 0.78rem;
}

.ch14-visual[data-unit-visual-extension] .ch14-visual-heading h3 {
    margin: 0;
    color: var(--ch14-ink);
    font-size: var(--unit-text-heading-medium, 17px);
    font-weight: 760;
    line-height: 1.22;
    letter-spacing: -0.015em;
}

.ch14-visual[data-unit-visual-extension] .ch14-visual-kicker {
    margin: 0;
    color: var(--ch14-property);
    font-size: var(--unit-text-micro, 11px);
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.ch14-visual[data-unit-visual-extension] :is(.ch14-state-controls, .ch14-timeline) {
    width: 100%;
    min-width: 0;
}

.ch14-visual[data-unit-visual-extension] .ch14-state-controls {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(8rem, 100%), 1fr));
    gap: 0.42rem;
    margin: 0 0 0.66rem;
}

.ch14-visual[data-unit-visual-extension] :is(.ch14-state-button, .ch14-timeline-button) {
    min-width: 0;
    min-height: 38px;
    padding: 0.42rem 0.62rem;
    border: 1px solid color-mix(in srgb, var(--ch14-line) 68%, transparent);
    border-radius: 0.68rem;
    background: rgb(255 255 255 / 0.96);
    color: var(--ch14-ink);
    font: inherit;
    font-size: var(--unit-text-meta, 12px);
    font-weight: 740;
    line-height: 1.17;
    cursor: pointer;
}

.ch14-visual[data-unit-visual-extension] :is(.ch14-state-button, .ch14-timeline-button):hover {
    border-color: var(--ch14-property);
}

.ch14-visual[data-unit-visual-extension] .ch14-state-button[aria-pressed="true"] {
    border-color: var(--ch14-property);
    background: var(--ch14-property);
    color: #fff;
    box-shadow: 0 0.3rem 0.8rem rgb(32 130 101 / 0.18);
}

.ch14-visual[data-unit-visual-extension] .ch14-timeline {
    display: grid;
    grid-template-columns: max-content max-content minmax(6rem, 1fr) minmax(9rem, max-content);
    align-items: center;
    gap: 0.52rem;
    margin: 0 0 0.66rem;
    padding: 0.54rem 0.62rem;
    border-radius: 0.76rem;
    background: color-mix(in srgb, var(--ch14-energy) 7%, #fff);
}

.ch14-visual[data-unit-visual-extension] .ch14-timeline-button {
    min-height: 34px;
    color: var(--ch14-energy);
    white-space: nowrap;
}

.ch14-visual[data-unit-visual-extension] .ch14-timeline-button[aria-pressed="true"] {
    border-color: var(--ch14-energy);
    background: color-mix(in srgb, var(--ch14-energy) 10%, #fff);
}

.ch14-visual[data-unit-visual-extension] .ch14-timeline-scrub {
    width: 100%;
    min-width: 0;
    accent-color: var(--ch14-energy);
}

.ch14-visual[data-unit-visual-extension] .ch14-timeline-phase {
    min-width: 0;
    color: var(--ch14-muted);
    font-size: var(--unit-text-meta, 12px);
    font-weight: 690;
    line-height: 1.23;
    text-align: right;
}

.ch14-visual[data-unit-visual-extension] .ch14-visual-drawing {
    position: relative;
    width: 100%;
    min-width: 0;
    aspect-ratio: 720 / 420;
    overflow: clip;
}

.ch14-visual[data-unit-visual-extension] .ch14-visual-drawing > svg {
    display: block;
    width: 100%;
    height: 100%;
    overflow: visible;
}

.ch14-visual[data-unit-visual-extension] :is(.ch14-math-label, .ch14-text-label) {
    position: absolute;
    z-index: 3;
    max-width: min(15rem, 40%);
    color: var(--ch14-ink);
    font-size: var(--unit-text-meta, 12px);
    font-weight: 720;
    line-height: 1.15;
    text-align: center;
    white-space: nowrap;
    transform: translate(-50%, -50%);
    pointer-events: none;
    text-shadow: -2px 0 #fff, 2px 0 #fff, 0 -2px #fff, 0 2px #fff;
}

.ch14-visual[data-unit-visual-extension] :is(.ch14-math-label, .ch14-text-label)[data-math-anchor="start"] {
    transform: translate(0, -50%);
    text-align: left;
}

.ch14-visual[data-unit-visual-extension] :is(.ch14-math-label, .ch14-text-label)[data-math-anchor="end"] {
    transform: translate(-100%, -50%);
    text-align: right;
}

.ch14-visual[data-unit-visual-extension] :is(.ch14-math-label.is-axis, .ch14-text-label.is-muted) {
    color: var(--ch14-muted);
    font-weight: 660;
}

.ch14-visual[data-unit-visual-extension] :is(.ch14-math-label.is-hot, .ch14-math-label.is-a) {
    color: var(--ch14-hot);
}

.ch14-visual[data-unit-visual-extension] :is(.ch14-math-label.is-cool, .ch14-math-label.is-b) {
    color: var(--ch14-cool);
}

.ch14-visual[data-unit-visual-extension] :is(.ch14-math-label.is-energy, .ch14-text-label.is-warning) {
    color: var(--ch14-energy);
}

.ch14-visual[data-unit-visual-extension] :is(.ch14-math-label.is-property, .ch14-math-label.is-property-one) {
    color: var(--ch14-property);
}

.ch14-visual[data-unit-visual-extension] .ch14-math-label.is-property-two {
    color: var(--ch14-property-two);
}

.ch14-visual[data-unit-visual-extension] .ch14-math-label.is-kelvin {
    color: var(--ch14-cool);
}

.ch14-visual[data-unit-visual-extension] .ch14-math-label.is-celsius {
    color: var(--ch14-hot);
}

.ch14-visual[data-unit-visual-extension] :is(.ch14-visual-caption, .ch14-phase-card, .ch14-state-readout) {
    min-width: 0;
    color: var(--ch14-muted);
    font-size: var(--unit-text-body-small, 13px);
    line-height: 1.5;
}

.ch14-visual[data-unit-visual-extension] .ch14-visual-caption {
    margin: 0.66rem 0 0;
}

.ch14-visual[data-unit-visual-extension] .ch14-formula-strip {
    display: flex;
    flex-wrap: wrap;
    gap: 0.42rem;
    margin-top: 0.62rem;
}

.ch14-visual[data-unit-visual-extension] .ch14-formula-chip {
    max-width: 100%;
    padding: 0.35rem 0.58rem;
    border: 1px solid color-mix(in srgb, var(--ch14-line) 45%, transparent);
    border-radius: 0.62rem;
    background: rgb(255 255 255 / 0.86);
    color: var(--ch14-ink);
    font-size: var(--unit-text-meta, 12px);
    line-height: 1.25;
    overflow-x: auto;
    scrollbar-width: thin;
}

.ch14-visual[data-unit-visual-extension] .ch14-state-readout {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.35rem;
    margin: 0 0 0.58rem;
    padding: 0.52rem 0.62rem;
    border-radius: 0.72rem;
    background: rgb(255 255 255 / 0.82);
    color: var(--ch14-ink);
    text-align: center;
}

.ch14-visual[data-unit-visual-extension] .ch14-state-readout > span {
    min-width: 0;
    padding: 0.25rem 0.18rem;
    border-radius: 0.48rem;
    background: color-mix(in srgb, var(--ch14-property) 5%, #fff);
}

.ch14-visual[data-unit-visual-extension] .ch14-phase-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.7rem;
    margin: 0 0 0.58rem;
    padding: 0.52rem 0.66rem;
    border-radius: 0.72rem;
    background: rgb(255 255 255 / 0.84);
}

.ch14-visual[data-unit-visual-extension] .ch14-phase-card strong {
    color: var(--ch14-ink);
}

.ch14-visual[data-unit-visual-extension] .ch14-static-stage {
    min-width: 0;
}

.ch14-visual[data-unit-visual-extension] .ch14-journey-stage {
    min-width: 0;
    padding: clamp(0.58rem, 2vw, 0.9rem);
    border-radius: 0.9rem;
    background: rgb(255 255 255 / 0.8);
}

.ch14-visual[data-unit-visual-extension] .ch14-journey-route {
    display: flex;
    align-items: stretch;
    justify-content: center;
    gap: 0.55rem;
    min-width: 0;
}

.ch14-visual[data-unit-visual-extension] .ch14-journey-card {
    display: grid;
    grid-template-columns: max-content 1fr;
    align-items: center;
    gap: 0.28rem 0.55rem;
    flex: 1 1 0;
    min-width: 0;
    padding: 0.78rem;
    border: 1px solid color-mix(in srgb, var(--ch14-line) 42%, transparent);
    border-top: 4px solid var(--ch14-property);
    border-radius: 0.78rem;
    background: #fff;
}

.ch14-visual[data-unit-visual-extension] .ch14-journey-card.is-plateau {
    border-top-color: var(--ch14-energy);
}

.ch14-visual[data-unit-visual-extension] .ch14-journey-card.is-loss {
    border-top-color: var(--ch14-hot);
}

.ch14-visual[data-unit-visual-extension] .ch14-journey-card.is-gain {
    border-top-color: var(--ch14-cool);
}

.ch14-visual[data-unit-visual-extension] .ch14-journey-card strong {
    min-width: 0;
    color: var(--ch14-ink);
    font-size: var(--unit-text-body, 14px);
    overflow-x: auto;
}

.ch14-visual[data-unit-visual-extension] .ch14-journey-card > span:last-child {
    grid-column: 1 / -1;
    color: var(--ch14-muted);
    font-size: var(--unit-text-meta, 12px);
    line-height: 1.35;
}

.ch14-visual[data-unit-visual-extension] .ch14-journey-number {
    display: inline-grid;
    width: 1.55rem;
    height: 1.55rem;
    place-items: center;
    border-radius: 50%;
    background: color-mix(in srgb, var(--ch14-property) 12%, #fff);
    color: var(--ch14-property);
    font-size: var(--unit-text-meta, 12px);
    font-weight: 800;
}

.ch14-visual[data-unit-visual-extension] .ch14-journey-plus {
    align-self: center;
    color: var(--ch14-muted);
    font-size: 1.3rem;
    font-weight: 800;
}

.ch14-visual[data-unit-visual-extension] .ch14-journey-total {
    margin-top: 0.7rem;
    padding: 0.62rem;
    border-radius: 0.68rem;
    background: color-mix(in srgb, var(--ch14-property) 7%, #fff);
    color: var(--ch14-ink);
    text-align: center;
    overflow-x: auto;
}

/* SVG layer hierarchy */
.ch14-visual[data-unit-visual-extension] .ch14-axis {
    fill: none;
    stroke: var(--ch14-neutral);
    stroke-width: 2;
    stroke-linecap: round;
}

.ch14-visual[data-unit-visual-extension] :is(.ch14-guide, .ch14-contact-boundary) {
    fill: none;
    stroke: var(--ch14-line);
    stroke-width: 1.35;
    stroke-dasharray: 6 7;
}

.ch14-visual[data-unit-visual-extension] .ch14-vector {
    fill: none;
    stroke-width: 4;
    stroke-linecap: round;
}

.ch14-visual[data-unit-visual-extension] .ch14-vector.is-energy {
    stroke: var(--ch14-energy);
}

.ch14-visual[data-unit-visual-extension] .ch14-vector.is-cool {
    stroke: var(--ch14-cool);
}

.ch14-visual[data-unit-visual-extension] .ch14-arrowhead {
    fill: none;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.ch14-visual[data-unit-visual-extension] .ch14-arrowhead.is-energy {
    stroke: var(--ch14-energy);
}

.ch14-visual[data-unit-visual-extension] .ch14-arrowhead.is-cool {
    stroke: var(--ch14-cool);
}

.ch14-visual[data-unit-visual-extension] .ch14-arrowhead.is-property {
    stroke: var(--ch14-property);
}

.ch14-visual[data-unit-visual-extension] .ch14-arrowhead.is-neutral {
    stroke: var(--ch14-neutral);
}

.ch14-visual[data-unit-visual-extension] .ch14-beaker {
    fill: rgb(255 255 255 / 0.72);
    stroke: var(--ch14-neutral);
    stroke-width: 3;
}

.ch14-visual[data-unit-visual-extension] .ch14-water {
    fill: color-mix(in srgb, var(--ch14-hot) 18%, #fff);
    stroke: none;
}

.ch14-visual[data-unit-visual-extension] .ch14-water-surface {
    stroke: var(--ch14-hot);
    stroke-width: 2;
}

.ch14-visual[data-unit-visual-extension] .ch14-thermometer-stem {
    fill: #fff;
    stroke: var(--ch14-neutral);
    stroke-width: 2.5;
    rx: 14px;
}

.ch14-visual[data-unit-visual-extension] .ch14-thermometer-bulb {
    fill: color-mix(in srgb, var(--ch14-cool) 24%, #fff);
    stroke: var(--ch14-neutral);
    stroke-width: 2.5;
}

.ch14-visual[data-unit-visual-extension] .ch14-thermometer-liquid {
    fill: var(--ch14-hot);
    rx: 8px;
}

.ch14-visual[data-unit-visual-extension] .ch14-contact-environment {
    fill: rgb(255 255 255 / 0.72);
    stroke: color-mix(in srgb, var(--ch14-line) 60%, transparent);
    stroke-width: 1.5;
    rx: 18px;
}

.ch14-visual[data-unit-visual-extension] .ch14-body {
    stroke-width: 2.5;
    rx: 18px;
    transition: fill 120ms ease, stroke 120ms ease;
}

.ch14-visual[data-unit-visual-extension] .ch14-body[data-thermal-state="hot"] {
    fill: color-mix(in srgb, var(--ch14-hot) 18%, #fff);
    stroke: var(--ch14-hot);
}

.ch14-visual[data-unit-visual-extension] .ch14-body[data-thermal-state="cool"] {
    fill: color-mix(in srgb, var(--ch14-cool) 18%, #fff);
    stroke: var(--ch14-cool);
}

.ch14-visual[data-unit-visual-extension] .ch14-body[data-thermal-state="equal"] {
    fill: color-mix(in srgb, var(--ch14-property) 11%, #fff);
    stroke: var(--ch14-property);
}

.ch14-visual[data-unit-visual-extension] .ch14-curve {
    fill: none;
    stroke-width: 4;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.ch14-visual[data-unit-visual-extension] :is(.ch14-curve.is-property, .ch14-curve.is-property-one) {
    stroke: var(--ch14-property);
}

.ch14-visual[data-unit-visual-extension] .ch14-curve.is-property-two {
    stroke: var(--ch14-property-two);
}

.ch14-visual[data-unit-visual-extension] .ch14-curve.is-heating {
    stroke: var(--ch14-energy);
}

.ch14-visual[data-unit-visual-extension] .ch14-point {
    stroke: #fff;
    stroke-width: 2;
}

.ch14-visual[data-unit-visual-extension] .ch14-point.is-property {
    fill: var(--ch14-property);
}

.ch14-visual[data-unit-visual-extension] .ch14-point.is-energy {
    fill: var(--ch14-energy);
}

.ch14-visual[data-unit-visual-extension] .ch14-point.is-neutral {
    fill: var(--ch14-neutral);
}

.ch14-visual[data-unit-visual-extension] .ch14-calibrated-range {
    stroke: color-mix(in srgb, var(--ch14-property) 52%, transparent);
    stroke-width: 1.5;
    stroke-dasharray: 5 7;
}

.ch14-visual[data-unit-visual-extension] .ch14-sensor-body {
    fill: rgb(255 255 255 / 0.8);
    stroke: color-mix(in srgb, var(--ch14-property) 66%, var(--ch14-line));
    stroke-width: 2;
    rx: 18px;
}

.ch14-visual[data-unit-visual-extension] .ch14-sensor-detail {
    fill: none;
    stroke: var(--ch14-property);
    stroke-width: 4;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.ch14-visual[data-unit-visual-extension] .ch14-disagreement {
    stroke: var(--ch14-energy);
    stroke-width: 4;
    stroke-linecap: round;
}

.ch14-visual[data-unit-visual-extension] .ch14-scale {
    fill: none;
    stroke-width: 4;
    stroke-linecap: round;
}

.ch14-visual[data-unit-visual-extension] .ch14-scale.is-kelvin {
    stroke: var(--ch14-cool);
}

.ch14-visual[data-unit-visual-extension] .ch14-scale.is-celsius {
    stroke: var(--ch14-hot);
}

.ch14-visual[data-unit-visual-extension] .ch14-scale-tick {
    stroke: var(--ch14-neutral);
    stroke-width: 2;
}

.ch14-visual[data-unit-visual-extension] .ch14-interval-bracket {
    fill: none;
    stroke: var(--ch14-energy);
    stroke-width: 3;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.ch14-visual[data-unit-visual-extension] .ch14-lab-bench {
    fill: rgb(255 255 255 / 0.7);
    stroke: color-mix(in srgb, var(--ch14-line) 68%, transparent);
    stroke-width: 1.5;
    rx: 18px;
}

.ch14-visual[data-unit-visual-extension] .ch14-heated-block {
    fill: color-mix(in srgb, var(--ch14-hot) 24%, #fff);
    stroke: var(--ch14-neutral);
    stroke-width: 2.5;
    rx: 12px;
}

.ch14-visual[data-unit-visual-extension] .ch14-heater {
    fill: none;
    stroke: var(--ch14-energy);
    stroke-width: 5;
    stroke-linecap: round;
    stroke-linejoin: round;
}

@media (max-width: 620px) {
    .ch14-visual[data-unit-visual-extension] .ch14-state-controls {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .ch14-visual[data-unit-visual-extension] .ch14-timeline {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .ch14-visual[data-unit-visual-extension] .ch14-timeline-scrub {
        grid-column: 1 / -1;
        grid-row: 2;
    }

    .ch14-visual[data-unit-visual-extension] .ch14-timeline-phase {
        grid-column: 1 / -1;
        grid-row: 3;
        text-align: left;
    }

    .ch14-visual[data-unit-visual-extension] :is(.ch14-math-label, .ch14-text-label) {
        max-width: 44%;
        font-size: max(9px, calc(var(--unit-text-meta, 12px) - 1px));
    }

    .ch14-visual[data-unit-visual-extension] .ch14-journey-route {
        display: grid;
        grid-template-columns: 1fr;
    }

    .ch14-visual[data-unit-visual-extension] .ch14-journey-plus {
        justify-self: center;
        line-height: 0.8;
    }

    .ch14-visual[data-unit-visual-extension] .ch14-phase-card {
        align-items: flex-start;
        flex-direction: column;
    }

    .ch14-visual[data-unit-visual-extension] .ch14-state-readout {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 390px) {
    .ch14-visual[data-unit-visual-extension] .ch14-state-controls {
        grid-template-columns: 1fr;
    }
}

@media (prefers-reduced-motion: reduce) {
    .ch14-visual[data-unit-visual-extension] * {
        scroll-behavior: auto !important;
        transition-duration: 0.001ms !important;
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
    }
}