.ldrw-root {
    --ldrw-canvas: #f7fbff;
    --ldrw-surface: #ffffff;
    --ldrw-surface-soft: #eaf4ff;
    --ldrw-ink: #132743;
    --ldrw-ink-muted: #4c5d73;
    --ldrw-space: #132743;
    --ldrw-sapphire: #1654a3;
    --ldrw-turquoise: #08767f;
    --ldrw-turquoise-soft: #dff6f6;
    --ldrw-purple: #6842b8;
    --ldrw-purple-soft: #efe8ff;
    --ldrw-success: #1d6b3c;
    --ldrw-success-soft: #e8f7ed;
    --ldrw-gold: #8a5700;
    --ldrw-gold-soft: #fff4d8;
    --ldrw-warning: #8a4b08;
    --ldrw-error: #b42318;
    --ldrw-error-soft: #fdecea;
    --ldrw-focus: #7a3fe3;
    color: var(--ldrw-ink);
    background: var(--ldrw-canvas);
    border: 1px solid #cad8e8;
    border-radius: 22px;
    box-sizing: border-box;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    line-height: 1.5;
    margin: 1.5rem auto;
    max-width: 1120px;
    overflow: clip;
    width: 100%;
}

.ldrw-root *,
.ldrw-root *::before,
.ldrw-root *::after {
    box-sizing: border-box;
}

.ldrw-root .ldrw-shell {
    padding: 20px;
}

.ldrw-root .ldrw-shell__header,
.ldrw-root .ldrw-session-panel__heading,
.ldrw-root .ldrw-audio-panel {
    align-items: flex-start;
    display: flex;
    gap: 16px;
    justify-content: space-between;
}

.ldrw-root .ldrw-shell__header {
    margin-bottom: 18px;
}

.ldrw-root .ldrw-kicker {
    color: var(--ldrw-purple);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0.08em;
    margin: 0 0 4px;
    text-transform: uppercase;
}

.ldrw-root .ldrw-shell__title,
.ldrw-root .ldrw-session-panel h3,
.ldrw-root .ldrw-session-intro h3 {
    color: var(--ldrw-ink);
    font-weight: 800;
    line-height: 1.2;
}

.ldrw-root .ldrw-shell__title {
    font-size: clamp(1.5rem, 5vw, 2rem);
    margin: 0;
}

.ldrw-root .ldrw-session-panel h3,
.ldrw-root .ldrw-session-intro h3 {
    font-size: 20px;
    margin: 0 0 8px;
}

.ldrw-root .ldrw-build-badge,
.ldrw-root .ldrw-state-badge {
    border-radius: 999px;
    flex: 0 0 auto;
    font-size: 12px;
    font-weight: 750;
    padding: 6px 10px;
}

.ldrw-root .ldrw-build-badge {
    background: var(--ldrw-gold-soft);
    border: 1px solid #d9b55a;
    color: var(--ldrw-gold);
}

.ldrw-root .ldrw-session-intro {
    align-items: center;
    background: var(--ldrw-surface);
    border: 2px solid #b8d5ef;
    border-radius: 22px;
    box-shadow: 0 8px 24px rgba(19, 39, 67, 0.08);
    display: grid;
    gap: 16px;
    grid-template-columns: auto minmax(0, 1fr);
    padding: 20px;
}

.ldrw-root .ldrw-session-intro__icon {
    align-items: center;
    background: var(--ldrw-turquoise-soft);
    border: 2px solid var(--ldrw-turquoise);
    border-radius: 16px;
    color: var(--ldrw-turquoise);
    display: flex;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 38px;
    font-weight: 800;
    height: 72px;
    justify-content: center;
    width: 72px;
}

.ldrw-root .ldrw-session-intro p,
.ldrw-root .ldrw-stage-note,
.ldrw-root .ldrw-audio-panel span,
.ldrw-root .ldrw-field small {
    color: var(--ldrw-ink-muted);
}

.ldrw-root .ldrw-session-intro p {
    font-size: 16px;
    margin: 0 0 10px;
}

.ldrw-root .ldrw-runtime-status,
.ldrw-root .ldrw-recovery,
.ldrw-root .ldrw-error {
    border-radius: 10px;
    font-size: 15px;
    font-weight: 650;
    margin-top: 12px;
    padding: 10px 12px;
}

.ldrw-root .ldrw-runtime-status {
    background: var(--ldrw-surface-soft);
    border-left: 4px solid var(--ldrw-sapphire);
    color: var(--ldrw-ink) !important;
}

.ldrw-root.ldrw-root--ready .ldrw-runtime-status,
.ldrw-root .ldrw-recovery {
    background: var(--ldrw-success-soft);
    border-left: 4px solid var(--ldrw-success);
    color: var(--ldrw-ink);
}

.ldrw-root .ldrw-error {
    background: var(--ldrw-error-soft);
    border: 1px solid #e5a39e;
    border-left: 4px solid var(--ldrw-error);
    color: #69170f;
}

.ldrw-root .ldrw-session-panel {
    background: var(--ldrw-surface);
    border: 1px solid #cbd9e8;
    border-radius: 22px;
    margin-top: 16px;
    outline: none;
    padding: 18px;
}

.ldrw-root .ldrw-session-panel:focus-visible {
    box-shadow: 0 0 0 2px var(--ldrw-surface), 0 0 0 5px var(--ldrw-focus);
}

.ldrw-root .ldrw-state-badge {
    background: var(--ldrw-surface-soft);
    border: 1px solid #9fb7d1;
    color: var(--ldrw-ink);
}

.ldrw-root .ldrw-state-badge[data-ldrw-state="running"] {
    background: var(--ldrw-success-soft);
    border-color: #8bc49e;
    color: var(--ldrw-success);
}

.ldrw-root .ldrw-state-badge[data-ldrw-state="paused"] {
    background: var(--ldrw-gold-soft);
    border-color: #d9b55a;
    color: var(--ldrw-warning);
}

.ldrw-root .ldrw-state-badge[data-ldrw-state="completed"] {
    background: var(--ldrw-purple-soft);
    border-color: #bca9e4;
    color: var(--ldrw-purple);
}

.ldrw-root .ldrw-state-badge[data-ldrw-state="cancelled"],
.ldrw-root .ldrw-state-badge[data-ldrw-state="error"] {
    background: var(--ldrw-error-soft);
    border-color: #e5a39e;
    color: var(--ldrw-error);
}

.ldrw-root .ldrw-session-grid {
    display: grid;
    gap: 12px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin-top: 16px;
}

.ldrw-root .ldrw-field,
.ldrw-root .ldrw-engine-stat {
    background: var(--ldrw-surface-soft);
    border: 1px solid #c8d9eb;
    border-radius: 16px;
    min-width: 0;
    padding: 12px 14px;
}

.ldrw-root .ldrw-field--wide {
    grid-column: 1 / -1;
}

.ldrw-root .ldrw-field > span,
.ldrw-root .ldrw-engine-stat > span,
.ldrw-root .ldrw-volume > span {
    color: var(--ldrw-ink-muted);
    display: block;
    font-size: 13px;
    font-weight: 700;
    margin-bottom: 5px;
}

.ldrw-root .ldrw-field input[type="text"],
.ldrw-root .ldrw-field input[type="number"] {
    background: var(--ldrw-surface);
    border: 2px solid #96abc3;
    border-radius: 10px;
    color: var(--ldrw-ink);
    font: 650 16px/1.3 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    max-width: 100%;
    min-height: 44px;
    padding: 9px 11px;
    width: 100%;
}

.ldrw-root .ldrw-field input[type="text"]:disabled,
.ldrw-root .ldrw-field input[type="number"]:disabled {
    background: #edf1f5;
    color: #59687a;
}

.ldrw-root .ldrw-field small {
    display: block;
    font-size: 13px;
    margin-top: 5px;
}

.ldrw-root .ldrw-engine-stat strong {
    color: var(--ldrw-ink);
    display: block;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 16px;
    overflow-wrap: anywhere;
}

.ldrw-root [data-ldrw-storage-status][data-ldrw-tone="success"] {
    color: var(--ldrw-success);
}

.ldrw-root [data-ldrw-storage-status][data-ldrw-tone="warning"] {
    color: var(--ldrw-warning);
}

.ldrw-root .ldrw-engine-actions {
    display: grid;
    gap: 10px;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin-top: 16px;
}

.ldrw-root .ldrw-button {
    align-items: center;
    appearance: none;
    background: var(--ldrw-surface);
    border: 2px solid #8da8c5;
    border-radius: 12px;
    color: var(--ldrw-ink);
    cursor: pointer;
    display: inline-flex;
    font: 700 16px/1.2 inherit;
    justify-content: center;
    min-height: 46px;
    padding: 10px 14px;
    text-align: center;
}

.ldrw-root .ldrw-button--primary {
    background: var(--ldrw-sapphire);
    border-color: var(--ldrw-sapphire);
    color: #ffffff;
}

.ldrw-root .ldrw-button--quiet {
    border-color: #d2a5a1;
    color: #7b241c;
}

.ldrw-root .ldrw-button--small {
    min-height: 44px;
    min-width: 112px;
}

.ldrw-root .ldrw-button:disabled {
    background: #edf1f5;
    border-color: #cbd3dc;
    color: #657384;
    cursor: not-allowed;
}

.ldrw-root .ldrw-button:focus-visible,
.ldrw-root .ldrw-field input:focus-visible,
.ldrw-root .ldrw-volume input:focus-visible {
    outline: 3px solid var(--ldrw-focus);
    outline-offset: 3px;
}

.ldrw-root .ldrw-audio-panel {
    align-items: center;
    background: var(--ldrw-purple-soft);
    border: 1px solid #cbbce9;
    border-radius: 16px;
    flex-wrap: wrap;
    margin-top: 16px;
    padding: 14px 16px;
}

.ldrw-root .ldrw-audio-panel > div {
    flex: 1 1 220px;
}

.ldrw-root .ldrw-audio-panel strong,
.ldrw-root .ldrw-audio-panel span {
    display: block;
}

.ldrw-root .ldrw-volume {
    flex: 1 1 180px;
    min-width: 150px;
}

.ldrw-root .ldrw-volume input[type="range"] {
    width: 100%;
}

.ldrw-root .ldrw-stage-note {
    background: var(--ldrw-gold-soft);
    border-left: 4px solid var(--ldrw-gold);
    border-radius: 12px;
    display: grid;
    font-size: 14px;
    gap: 2px;
    margin-top: 16px;
    padding: 12px 14px;
}

.ldrw-root .ldrw-stage-note strong {
    color: var(--ldrw-ink);
}

.ldrw-root .ldrw-noscript,
.ldrw-root.ldrw-root--disabled {
    background: #fff4d8;
    border: 1px solid #d9b55a;
    color: var(--ldrw-ink, #132743);
    padding: 16px;
}

.ldrw-root .ldrw-noscript {
    border-radius: 0 0 22px 22px;
}

.ldrw-root .ldrw-noscript strong,
.ldrw-root .ldrw-noscript span {
    display: block;
}

.ldrw-root.ldrw-root--disabled {
    border-radius: 16px;
}

.ldrw-root.ldrw-root--disabled p {
    margin: 0;
}

@media (max-width: 640px) {
    .ldrw-root .ldrw-shell {
        padding: 14px;
    }

    .ldrw-root .ldrw-shell__header,
    .ldrw-root .ldrw-session-panel__heading {
        align-items: flex-start;
        flex-direction: column;
        gap: 8px;
    }

    .ldrw-root .ldrw-session-intro {
        align-items: flex-start;
        grid-template-columns: 52px minmax(0, 1fr);
        padding: 15px;
    }

    .ldrw-root .ldrw-session-intro__icon {
        border-radius: 14px;
        font-size: 30px;
        height: 52px;
        width: 52px;
    }

    .ldrw-root .ldrw-session-grid,
    .ldrw-root .ldrw-engine-actions {
        grid-template-columns: 1fr;
    }

    .ldrw-root .ldrw-field--wide {
        grid-column: auto;
    }

    .ldrw-root .ldrw-audio-panel {
        align-items: stretch;
        flex-direction: column;
    }

    .ldrw-root .ldrw-button--small {
        width: 100%;
    }
}

@media (prefers-reduced-motion: reduce) {
    .ldrw-root:not([data-ldrw-motion="standard"]) *,
    .ldrw-root:not([data-ldrw-motion="standard"]) *::before,
    .ldrw-root:not([data-ldrw-motion="standard"]) *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.001ms !important;
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
    }
}

@media (forced-colors: active) {
    .ldrw-root,
    .ldrw-root .ldrw-session-intro,
    .ldrw-root .ldrw-session-panel,
    .ldrw-root .ldrw-field,
    .ldrw-root .ldrw-engine-stat,
    .ldrw-root .ldrw-audio-panel,
    .ldrw-root .ldrw-stage-note,
    .ldrw-root .ldrw-runtime-status,
    .ldrw-root .ldrw-recovery,
    .ldrw-root .ldrw-error,
    .ldrw-root .ldrw-state-badge,
    .ldrw-root .ldrw-build-badge,
    .ldrw-root .ldrw-session-intro__icon,
    .ldrw-root .ldrw-button,
    .ldrw-root .ldrw-field input[type="text"],
.ldrw-root .ldrw-field input[type="number"] {
        background: Canvas;
        border-color: CanvasText;
        box-shadow: none;
        color: CanvasText;
        forced-color-adjust: auto;
    }

    .ldrw-root .ldrw-button:focus-visible,
    .ldrw-root .ldrw-field input:focus-visible,
    .ldrw-root .ldrw-volume input:focus-visible,
    .ldrw-root .ldrw-session-panel:focus-visible {
        outline-color: Highlight;
    }
}

.ldrw-root .ldrw-math-panel {
    background: var(--ldrw-surface);
    border: 1px solid #bfd0e2;
    border-radius: 22px;
    box-shadow: 0 8px 24px rgba(19, 39, 67, 0.08);
    margin-top: 18px;
    padding: 18px;
}

.ldrw-root .ldrw-math-badge {
    background: var(--ldrw-gold-soft);
    border: 1px solid #d6b15e;
    border-radius: 999px;
    color: var(--ldrw-gold);
    display: inline-flex;
    font-size: 13px;
    font-weight: 800;
    line-height: 1.2;
    padding: 7px 10px;
}

.ldrw-root .ldrw-math-badge[data-ldrw-tone="success"] {
    background: var(--ldrw-success-soft);
    border-color: #8fc7a2;
    color: var(--ldrw-success);
}

.ldrw-root .ldrw-math-badge[data-ldrw-tone="warning"] {
    background: var(--ldrw-gold-soft);
    border-color: #d6b15e;
    color: var(--ldrw-warning);
}

.ldrw-root .ldrw-math-badge[data-ldrw-tone="error"] {
    background: var(--ldrw-error-soft);
    border-color: #e5a39e;
    color: var(--ldrw-error);
}

.ldrw-root .ldrw-math-controls {
    align-items: end;
    display: grid;
    gap: 12px;
    grid-template-columns: minmax(0, 1fr) minmax(160px, auto);
    margin-top: 16px;
}

.ldrw-root .ldrw-field select {
    appearance: auto;
    background: var(--ldrw-surface);
    border: 2px solid #96abc3;
    border-radius: 10px;
    color: var(--ldrw-ink);
    font: 650 16px/1.3 inherit;
    min-height: 44px;
    padding: 9px 11px;
    width: 100%;
}

.ldrw-root .ldrw-problem-card {
    background: var(--ldrw-surface-soft);
    border: 1px solid #bfd0e2;
    border-radius: 18px;
    margin-top: 16px;
    padding: 16px;
}

.ldrw-root .ldrw-problem-card__topline {
    color: var(--ldrw-ink-muted);
    display: flex;
    flex-wrap: wrap;
    font-size: 13px;
    font-weight: 700;
    gap: 8px 14px;
    justify-content: space-between;
}

.ldrw-root .ldrw-problem-expression {
    color: var(--ldrw-ink);
    font: 800 clamp(32px, 9vw, 44px)/1.1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    letter-spacing: 0.01em;
    margin: 18px 0 10px;
    text-align: center;
}

.ldrw-root .ldrw-problem-estimate,
.ldrw-root .ldrw-problem-note {
    color: var(--ldrw-ink);
    margin: 8px 0 0;
}

.ldrw-root .ldrw-problem-note {
    color: var(--ldrw-ink-muted);
    font-size: 14px;
}

.ldrw-root .ldrw-qa-details {
    background: var(--ldrw-surface);
    border: 1px solid #c8d9eb;
    border-radius: 14px;
    margin-top: 16px;
    padding: 12px 14px;
}

.ldrw-root .ldrw-qa-details summary {
    color: var(--ldrw-ink);
    cursor: pointer;
    font-weight: 800;
    min-height: 44px;
    padding: 10px 0;
}

.ldrw-root .ldrw-qa-grid {
    display: grid;
    gap: 10px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin: 8px 0 0;
}

.ldrw-root .ldrw-qa-grid > div {
    background: var(--ldrw-surface-soft);
    border-radius: 12px;
    min-width: 0;
    padding: 10px 12px;
}

.ldrw-root .ldrw-qa-grid dt {
    color: var(--ldrw-ink-muted);
    font-size: 12px;
    font-weight: 800;
    margin-bottom: 4px;
}

.ldrw-root .ldrw-qa-grid dd {
    color: var(--ldrw-ink);
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 14px;
    margin: 0;
    overflow-wrap: anywhere;
}

.ldrw-root .ldrw-field select:focus-visible,
.ldrw-root .ldrw-qa-details summary:focus-visible {
    outline: 3px solid var(--ldrw-focus);
    outline-offset: 3px;
}

@media (max-width: 640px) {
    .ldrw-root .ldrw-math-panel {
        padding: 15px;
    }

    .ldrw-root .ldrw-math-controls,
    .ldrw-root .ldrw-qa-grid {
        grid-template-columns: 1fr;
    }

    .ldrw-root .ldrw-math-controls .ldrw-button {
        width: 100%;
    }
}

@media (forced-colors: active) {
    .ldrw-root .ldrw-math-panel,
    .ldrw-root .ldrw-math-badge,
    .ldrw-root .ldrw-field select,
    .ldrw-root .ldrw-problem-card,
    .ldrw-root .ldrw-qa-details,
    .ldrw-root .ldrw-qa-grid > div {
        background: Canvas;
        border-color: CanvasText;
        box-shadow: none;
        color: CanvasText;
        forced-color-adjust: auto;
    }

    .ldrw-root .ldrw-field select:focus-visible,
    .ldrw-root .ldrw-qa-details summary:focus-visible {
        outline-color: Highlight;
    }
}

/* Stage 9 — conceptual base-ten workspace */
.ldrw-root .ldrw-concept-panel {
    display: grid;
    gap: 18px;
    padding: 20px;
    border: 1px solid rgba(22, 84, 163, 0.2);
    border-radius: var(--ldrw-radius-lg, 22px);
    background: #ffffff;
}

.ldrw-root .ldrw-concept-controls {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
    align-items: end;
}

.ldrw-root .ldrw-concept-card {
    display: grid;
    gap: 16px;
}

.ldrw-root .ldrw-concept-goal {
    display: grid;
    gap: 6px;
    padding: 14px 16px;
    border: 1px solid rgba(22, 84, 163, 0.18);
    border-radius: 16px;
    background: #f7fbff;
}

.ldrw-root .ldrw-concept-mode {
    width: fit-content;
    padding: 4px 9px;
    border: 1px solid #08767f;
    border-radius: 999px;
    color: #075c63;
    background: #dff6f6;
    font-size: 0.8rem;
    font-weight: 750;
}

.ldrw-root .ldrw-concept-workspace {
    display: grid;
    gap: 14px;
}

.ldrw-root .ldrw-cargo-station,
.ldrw-root .ldrw-group-station,
.ldrw-root .ldrw-quotient-console,
.ldrw-root .ldrw-remainder-console,
.ldrw-root .ldrw-check-console {
    min-width: 0;
    padding: 14px;
    border: 1px solid rgba(19, 39, 67, 0.16);
    border-radius: 16px;
    background: #ffffff;
}

.ldrw-root .ldrw-work-heading {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    justify-content: space-between;
    gap: 8px 12px;
    margin-bottom: 12px;
}

.ldrw-root .ldrw-work-heading h4,
.ldrw-root .ldrw-group-bay h5 {
    margin: 0;
    color: #132743;
}

.ldrw-root .ldrw-cargo-rack {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
    align-items: end;
}

.ldrw-root .ldrw-cargo-tile {
    display: grid;
    place-items: center;
    gap: 4px;
    min-width: 0;
    margin-inline: auto;
    border: 2px solid #132743;
    color: #132743;
    background: #ffffff;
    box-shadow: 0 4px 10px rgba(19, 39, 67, 0.08);
}

.ldrw-root .ldrw-cargo-tile--100 {
    width: min(76px, 100%);
    aspect-ratio: 1;
    border-radius: 14px;
    background: #eaf4ff;
}

.ldrw-root .ldrw-cargo-tile--10 {
    width: min(94px, 100%);
    min-height: 48px;
    border-radius: 12px;
    background: #dff6f6;
}

.ldrw-root .ldrw-cargo-tile--1 {
    width: min(48px, 100%);
    aspect-ratio: 1;
    border-radius: 10px;
    background: #fff4d8;
}

.ldrw-root .ldrw-cargo-tile__value {
    font-size: clamp(1rem, 4vw, 1.35rem);
    line-height: 1;
}

.ldrw-root .ldrw-cargo-tile__count {
    font-size: 0.82rem;
    font-weight: 700;
}

.ldrw-root .ldrw-group-bays {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 9px;
}

.ldrw-root .ldrw-group-bay {
    min-width: 0;
    padding: 10px;
    border: 2px solid rgba(8, 118, 127, 0.55);
    border-radius: 14px;
    background: #f8ffff;
}

.ldrw-root .ldrw-group-bay__summary {
    margin: 5px 0 0;
    color: #4c5d73;
    font-size: 0.86rem;
    overflow-wrap: anywhere;
}

.ldrw-root .ldrw-group-template {
    grid-column: 1 / -1;
    padding: 12px;
    border: 2px dashed #08767f;
    border-radius: 14px;
    background: #dff6f6;
    color: #132743;
}

.ldrw-root .ldrw-built-groups {
    grid-column: 1 / -1;
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
}

.ldrw-root .ldrw-group-chip {
    padding: 6px 9px;
    border: 1px solid #1654a3;
    border-radius: 999px;
    background: #eaf4ff;
    color: #132743;
    font-size: 0.82rem;
    font-weight: 700;
}

.ldrw-root .ldrw-empty-state {
    color: #4c5d73;
    font-size: 0.9rem;
}

.ldrw-root .ldrw-equivalence {
    padding: 11px 13px;
    border-left: 4px solid #6842b8;
    border-radius: 10px;
    background: #efe8ff;
    color: #132743;
    font-weight: 650;
}

.ldrw-root .ldrw-equivalence[data-ldrw-motion="trade"] {
    animation: ldrw-equivalence-pop 520ms ease-out;
}

.ldrw-root .ldrw-quotient-console {
    display: grid;
    gap: 12px;
}

.ldrw-root .ldrw-quotient-console > div:first-child {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 12px;
}

.ldrw-root .ldrw-quotient-console [data-ldrw-built-quotient] {
    font-size: clamp(1.8rem, 8vw, 2.5rem);
    color: #132743;
}

.ldrw-root .ldrw-place-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
}

.ldrw-root .ldrw-place-cell {
    display: grid;
    gap: 5px;
    min-width: 0;
    padding: 9px 8px;
    border: 2px solid rgba(19, 39, 67, 0.18);
    border-radius: 12px;
    text-align: center;
    background: #f7fbff;
}

.ldrw-root .ldrw-place-cell span {
    font-size: 0.76rem;
    font-weight: 700;
    color: #4c5d73;
}

.ldrw-root .ldrw-place-cell strong {
    font-size: 1.6rem;
    font-variant-numeric: tabular-nums;
}

.ldrw-root .ldrw-place-cell[data-ldrw-place-state="active"] {
    border-color: #6842b8;
    box-shadow: 0 0 0 2px rgba(104, 66, 184, 0.13);
}

.ldrw-root .ldrw-place-cell[data-ldrw-place-state="complete"] {
    border-color: #1d6b3c;
    background: #e8f7ed;
}

.ldrw-root .ldrw-remainder-console {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 5px 12px;
    border-style: dashed;
    border-color: #8a5700;
    background: #fffaf0;
}

.ldrw-root .ldrw-remainder-console strong {
    font-size: 1.6rem;
    color: #8a5700;
}

.ldrw-root .ldrw-remainder-console small {
    grid-column: 1 / -1;
    color: #4c5d73;
}

.ldrw-root .ldrw-concept-action-panel {
    display: grid;
    gap: 10px;
    align-items: end;
    padding: 14px;
    border: 1px solid rgba(22, 84, 163, 0.18);
    border-radius: 16px;
    background: #f7fbff;
}

.ldrw-root .ldrw-button--concept {
    min-height: 48px;
    white-space: normal;
}

.ldrw-root .ldrw-concept-summary {
    margin: 0;
    padding: 12px 14px;
    border-radius: 12px;
    background: #eef5fb;
    color: #132743;
    line-height: 1.5;
}

.ldrw-root .ldrw-check-console {
    border-color: #1d6b3c;
    background: #e8f7ed;
}

.ldrw-root .ldrw-check-console span {
    display: block;
    font-size: 0.8rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: #1d6b3c;
}

.ldrw-root .ldrw-check-console strong {
    display: block;
    margin-top: 6px;
    font-size: clamp(1.35rem, 6vw, 2rem);
    color: #132743;
    font-variant-numeric: tabular-nums;
}

.ldrw-root .ldrw-check-console p {
    margin: 5px 0 0;
}

.ldrw-root .ldrw-engine-qa {
    padding: 0;
    border: 1px solid rgba(19, 39, 67, 0.14);
    border-radius: 16px;
    background: #ffffff;
}

.ldrw-root .ldrw-engine-qa > summary {
    min-height: 44px;
    padding: 12px 15px;
    cursor: pointer;
    color: #132743;
    font-weight: 750;
}

.ldrw-root .ldrw-engine-qa .ldrw-session-panel {
    margin: 0 12px 12px;
}

@media (min-width: 720px) {
    .ldrw-root .ldrw-concept-controls {
        grid-template-columns: minmax(0, 1.2fr) minmax(0, 1.2fr) auto;
    }

    .ldrw-root .ldrw-concept-workspace {
        grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.35fr);
    }

    .ldrw-root .ldrw-group-bays {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .ldrw-root .ldrw-concept-action-panel {
        grid-template-columns: minmax(180px, 0.7fr) minmax(240px, 1fr) auto;
    }
}

@media (min-width: 1040px) {
    .ldrw-root .ldrw-group-bays {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
}

@media (prefers-reduced-motion: reduce) {
    .ldrw-root:not([data-ldrw-motion="standard"]) .ldrw-equivalence[data-ldrw-motion="trade"] {
        animation: none;
    }
}

@media (forced-colors: active) {
    .ldrw-root .ldrw-cargo-tile,
    .ldrw-root .ldrw-group-bay,
    .ldrw-root .ldrw-group-template,
    .ldrw-root .ldrw-place-cell,
    .ldrw-root .ldrw-remainder-console,
    .ldrw-root .ldrw-check-console,
    .ldrw-root .ldrw-concept-action-panel {
        forced-color-adjust: auto;
        border-color: CanvasText;
        background: Canvas;
        color: CanvasText;
        box-shadow: none;
    }

    .ldrw-root .ldrw-place-cell[data-ldrw-place-state="active"] {
        outline: 3px solid Highlight;
        outline-offset: 2px;
    }
}

@keyframes ldrw-equivalence-pop {
    from { transform: scale(0.985); opacity: 0.75; }
    to { transform: scale(1); opacity: 1; }
}

/* Stage 10 — partial quotients and quantity-linked written division. */
.ldrw-root .ldrw-algorithm-panel {
    display: grid;
    gap: 16px;
    margin: 18px 0;
    padding: clamp(14px, 4vw, 22px);
    border: 1px solid rgba(22, 84, 163, 0.22);
    border-radius: 22px;
    background: linear-gradient(180deg, #ffffff 0%, #f7fbff 100%);
}

.ldrw-root .ldrw-algorithm-controls {
    display: grid;
    gap: 12px;
    grid-template-columns: minmax(0, 1fr);
    align-items: end;
}

.ldrw-root .ldrw-algorithm-card,
.ldrw-root .ldrw-partial-workspace,
.ldrw-root .ldrw-standard-workspace {
    display: grid;
    gap: 14px;
    min-width: 0;
}

.ldrw-root .ldrw-algorithm-goal,
.ldrw-root .ldrw-algorithm-stats,
.ldrw-root .ldrw-multiples-rack,
.ldrw-root .ldrw-subtraction-log,
.ldrw-root .ldrw-standard-ledger,
.ldrw-root .ldrw-quantity-details,
.ldrw-root .ldrw-algorithm-feedback {
    min-width: 0;
}

.ldrw-root .ldrw-algorithm-goal {
    padding: 14px;
    border-radius: 16px;
    background: #eaf4ff;
}

.ldrw-root .ldrw-algorithm-stats {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.ldrw-root .ldrw-algorithm-stats > div {
    padding: 12px;
    border: 1px solid rgba(19, 39, 67, 0.14);
    border-radius: 14px;
    background: #fff;
}

.ldrw-root .ldrw-algorithm-stats span,
.ldrw-root .ldrw-algorithm-stats strong {
    display: block;
}

.ldrw-root .ldrw-algorithm-stats span {
    font-size: 0.82rem;
    font-weight: 700;
    color: #4c5d73;
}

.ldrw-root .ldrw-algorithm-stats strong {
    margin-top: 4px;
    font-size: clamp(1.35rem, 7vw, 2rem);
    font-variant-numeric: tabular-nums;
}

.ldrw-root .ldrw-multiples-rack {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
}

.ldrw-root .ldrw-multiple-card,
.ldrw-root .ldrw-standard-row,
.ldrw-root .ldrw-partial-row {
    display: grid;
    gap: 4px;
    padding: 11px 12px;
    border: 1px solid rgba(8, 118, 127, 0.24);
    border-radius: 14px;
    background: #fff;
    color: #132743;
}

.ldrw-root button.ldrw-multiple-card {
    width: 100%;
    min-height: 48px;
    cursor: pointer;
    text-align: left;
    font: inherit;
}

.ldrw-root button.ldrw-multiple-card:hover,
.ldrw-root button.ldrw-multiple-card:focus-visible {
    border-color: #6842b8;
}

.ldrw-root .ldrw-chunk-control,
.ldrw-root .ldrw-written-step {
    display: grid;
    gap: 10px;
    padding: 14px;
    border: 1px solid rgba(104, 66, 184, 0.2);
    border-radius: 16px;
    background: #efe8ff;
}

.ldrw-root .ldrw-algorithm-feedback {
    min-height: 46px;
    padding: 11px 13px;
    border-radius: 12px;
    border: 1px solid rgba(19, 39, 67, 0.12);
    background: #fff;
    line-height: 1.45;
}

.ldrw-root .ldrw-algorithm-feedback[data-ldrw-tone="warning"] {
    border-color: #8a4b08;
    background: #fff4d8;
}

.ldrw-root .ldrw-subtraction-log,
.ldrw-root .ldrw-standard-ledger {
    display: grid;
    gap: 8px;
}

.ldrw-root .ldrw-long-division {
    width: min(100%, 520px);
    margin-inline: auto;
    padding: 16px 12px;
    overflow-x: auto;
    border: 1px solid rgba(19, 39, 67, 0.16);
    border-radius: 16px;
    background: #fff;
    color: #132743;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
    font-variant-numeric: tabular-nums;
}

.ldrw-root .ldrw-long-division__quotient,
.ldrw-root [data-ldrw-notation-dividend] {
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: minmax(2.1rem, 1fr);
    align-items: center;
}

.ldrw-root .ldrw-long-division__quotient {
    margin-left: 3.6rem;
    border-bottom: 2px solid #132743;
}

.ldrw-root .ldrw-long-division__body {
    display: grid;
    grid-template-columns: auto auto minmax(0, 1fr);
    align-items: start;
    gap: 6px;
    margin-top: 5px;
}

.ldrw-root .ldrw-long-division__body > strong {
    min-width: 2.5rem;
    padding-top: 6px;
    text-align: right;
    font-size: clamp(1.35rem, 7vw, 2rem);
}

.ldrw-root .ldrw-long-division__bracket {
    padding-top: 2px;
    font-size: clamp(1.7rem, 8vw, 2.35rem);
    line-height: 1;
}

.ldrw-root .ldrw-notation-cell {
    display: grid;
    min-width: 2.1rem;
    min-height: 2.5rem;
    place-items: center;
    border-radius: 8px;
    font-size: clamp(1.35rem, 7vw, 2rem);
    font-weight: 700;
}

.ldrw-root .ldrw-notation-cell[data-ldrw-active="true"] {
    outline: 3px solid #6842b8;
    outline-offset: -2px;
    background: #efe8ff;
}

.ldrw-root .ldrw-quantity-details {
    padding: 0;
    border: 1px solid rgba(8, 118, 127, 0.25);
    border-radius: 14px;
    background: #dff6f6;
}

.ldrw-root .ldrw-quantity-details > summary {
    min-height: 44px;
    padding: 11px 13px;
    cursor: pointer;
    font-weight: 750;
}

.ldrw-root .ldrw-quantity-bridge {
    padding: 0 13px 13px;
}

.ldrw-root .ldrw-quantity-bridge p {
    margin: 6px 0 0;
    line-height: 1.48;
}

.ldrw-root .ldrw-standard-row span,
.ldrw-root .ldrw-standard-row small,
.ldrw-root .ldrw-partial-row span,
.ldrw-root .ldrw-partial-row small {
    overflow-wrap: anywhere;
}

.ldrw-root .ldrw-stage9-details {
    margin-top: 16px;
    border: 1px solid rgba(19, 39, 67, 0.14);
    border-radius: 16px;
    background: #fff;
}

.ldrw-root .ldrw-stage9-details > summary {
    min-height: 44px;
    padding: 12px 15px;
    cursor: pointer;
    font-weight: 750;
}

.ldrw-root .ldrw-stage9-details > .ldrw-concept-panel {
    margin: 0 12px 12px;
}

@media (min-width: 720px) {
    .ldrw-root .ldrw-algorithm-controls {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .ldrw-root .ldrw-algorithm-controls .ldrw-button {
        justify-self: start;
    }
    .ldrw-root .ldrw-chunk-control,
    .ldrw-root .ldrw-written-step {
        grid-template-columns: minmax(0, 1fr) auto;
        align-items: end;
    }
    .ldrw-root .ldrw-written-step > p {
        grid-column: 1 / -1;
    }
    .ldrw-root .ldrw-multiples-rack {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
}

@media (min-width: 1040px) {
    .ldrw-root .ldrw-algorithm-controls {
        grid-template-columns: minmax(0, 1.15fr) minmax(0, 1.15fr) minmax(180px, 0.65fr) minmax(160px, 0.65fr);
    }
    .ldrw-root .ldrw-algorithm-controls > .ldrw-button {
        grid-column: 1 / -1;
    }
}

@media (forced-colors: active) {
    .ldrw-root .ldrw-algorithm-panel,
    .ldrw-root .ldrw-algorithm-goal,
    .ldrw-root .ldrw-algorithm-stats > div,
    .ldrw-root .ldrw-multiple-card,
    .ldrw-root .ldrw-chunk-control,
    .ldrw-root .ldrw-written-step,
    .ldrw-root .ldrw-algorithm-feedback,
    .ldrw-root .ldrw-long-division,
    .ldrw-root .ldrw-quantity-details,
    .ldrw-root .ldrw-standard-row,
    .ldrw-root .ldrw-partial-row {
        forced-color-adjust: auto;
        border-color: CanvasText;
        background: Canvas;
        color: CanvasText;
        box-shadow: none;
    }
    .ldrw-root .ldrw-notation-cell[data-ldrw-active="true"] {
        outline-color: Highlight;
        background: Canvas;
    }
}
.ldrw-root .ldrw-subtraction-row {
    display: grid;
    gap: 4px;
    padding: 11px 12px;
    border: 1px solid rgba(8, 118, 127, 0.24);
    border-radius: 14px;
    background: #fff;
    color: #132743;
}

/* Honor semantic hidden state even when component rules set display:grid/flex. */
.ldrw-root [hidden] {
    display: none !important;
}
.ldrw-root .ldrw-quantity-bridge__visual {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 7px;
    margin: 9px 0;
}

.ldrw-root .ldrw-bridge-chip {
    display: block;
    padding: 8px 9px;
    border: 1px solid rgba(8, 118, 127, 0.28);
    border-radius: 10px;
    background: #fff;
    color: #132743;
    font-size: 0.84rem;
    font-weight: 700;
    overflow-wrap: anywhere;
}

@media (min-width: 720px) {
    .ldrw-root .ldrw-quantity-bridge__visual {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (forced-colors: active) {
    .ldrw-root .ldrw-bridge-chip {
        border-color: CanvasText;
        background: Canvas;
        color: CanvasText;
    }
}

/* Stage 11 mission/content engine */
.ldrw-root .ldrw-mission-panel {
    display: grid;
    gap: 16px;
    margin-top: 18px;
    padding: 16px;
    border: 1px solid rgba(22, 84, 163, 0.2);
    border-radius: 22px;
    background: linear-gradient(180deg, #f7fbff 0%, #ffffff 100%);
}

.ldrw-root .ldrw-mission-controls {
    display: grid;
    gap: 12px;
}

.ldrw-root .ldrw-mission-card {
    display: grid;
    gap: 15px;
    padding: 16px;
    border: 1px solid rgba(19, 39, 67, 0.15);
    border-radius: 18px;
    background: #fff;
    box-shadow: 0 6px 20px rgba(19, 39, 67, 0.06);
}

.ldrw-root .ldrw-mission-copy {
    display: grid;
    gap: 8px;
}

.ldrw-root .ldrw-mission-copy h4,
.ldrw-root .ldrw-mission-copy p {
    margin: 0;
}

.ldrw-root .ldrw-mission-copy h4 {
    color: #132743;
    font-size: clamp(1.2rem, 4.6vw, 1.45rem);
    line-height: 1.2;
}

.ldrw-root .ldrw-mission-story {
    line-height: 1.55;
}

.ldrw-root .ldrw-mission-question {
    padding: 12px 13px;
    border-left: 4px solid #1654a3;
    border-radius: 0 12px 12px 0;
    background: #eaf4ff;
    color: #132743;
    font-weight: 750;
    line-height: 1.45;
}

.ldrw-root .ldrw-mission-math,
.ldrw-root .ldrw-mission-decision,
.ldrw-root .ldrw-mission-hints,
.ldrw-root .ldrw-detective-work {
    display: grid;
    gap: 10px;
    padding: 13px;
    border: 1px solid rgba(19, 39, 67, 0.13);
    border-radius: 16px;
    background: #f7fbff;
}

.ldrw-root .ldrw-mission-math p,
.ldrw-root .ldrw-mission-feedback,
.ldrw-root .ldrw-mission-hints > div,
.ldrw-root .ldrw-concept-summary {
    margin: 0;
    line-height: 1.5;
}

.ldrw-root .ldrw-mission-tool-actions,
.ldrw-root .ldrw-mission-choices,
.ldrw-root .ldrw-mission-footer-actions {
    display: grid;
    gap: 9px;
}

.ldrw-root .ldrw-button--choice {
    width: 100%;
    justify-content: flex-start;
    min-height: 48px;
    text-align: left;
    white-space: normal;
    line-height: 1.35;
}

.ldrw-root .ldrw-mission-feedback:not(:empty),
.ldrw-root .ldrw-mission-hints > div:not([hidden]) {
    padding: 10px 11px;
    border-radius: 12px;
    background: #efe8ff;
    color: #132743;
}

.ldrw-root .ldrw-mission-feedback[data-ldrw-tone="success"] {
    background: #e8f7ed;
    color: #1d6b3c;
}

.ldrw-root .ldrw-mission-feedback[data-ldrw-tone="warning"] {
    background: #fff4d8;
    color: #8a4b08;
}

.ldrw-root .ldrw-detective-work ol {
    display: grid;
    gap: 8px;
    margin: 0;
    padding-left: 1.4rem;
}

.ldrw-root .ldrw-detective-work li {
    padding: 9px 10px;
    border: 1px solid rgba(104, 66, 184, 0.2);
    border-radius: 11px;
    background: #fff;
    line-height: 1.45;
}

.ldrw-root .ldrw-stage10-details {
    margin-top: 16px;
    border: 1px solid rgba(19, 39, 67, 0.14);
    border-radius: 16px;
    background: #fff;
}

.ldrw-root .ldrw-stage10-details > summary {
    min-height: 44px;
    padding: 12px 15px;
    cursor: pointer;
    font-weight: 750;
}

.ldrw-root .ldrw-stage10-details > .ldrw-algorithm-panel {
    margin: 0 12px 12px;
}

@media (min-width: 720px) {
    .ldrw-root .ldrw-mission-controls {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .ldrw-root .ldrw-mission-controls > .ldrw-field--wide,
    .ldrw-root .ldrw-mission-controls > .ldrw-button {
        grid-column: 1 / -1;
    }
    .ldrw-root .ldrw-mission-tool-actions {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
    .ldrw-root .ldrw-mission-choices {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (min-width: 1040px) {
    .ldrw-root .ldrw-mission-controls {
        grid-template-columns: minmax(0, 1.4fr) minmax(190px, .8fr) minmax(210px, .9fr);
        align-items: end;
    }
    .ldrw-root .ldrw-mission-controls > .ldrw-field--wide {
        grid-column: auto;
    }
    .ldrw-root .ldrw-mission-controls > .ldrw-button {
        grid-column: 1 / -1;
        justify-self: start;
    }
}

@media (forced-colors: active) {
    .ldrw-root .ldrw-mission-panel,
    .ldrw-root .ldrw-mission-card,
    .ldrw-root .ldrw-mission-math,
    .ldrw-root .ldrw-mission-decision,
    .ldrw-root .ldrw-mission-hints,
    .ldrw-root .ldrw-detective-work,
    .ldrw-root .ldrw-detective-work li,
    .ldrw-root .ldrw-mission-question,
    .ldrw-root .ldrw-stage10-details {
        forced-color-adjust: auto;
        border-color: CanvasText;
        background: Canvas;
        color: CanvasText;
        box-shadow: none;
    }
}

/* Stage 12 — local progress, My Hangar, and Grown-Up Dock. */
.ldrw-root .ldrw-progress-shell {
    display: grid;
    gap: var(--ldrw-space-5, 24px);
    margin-top: var(--ldrw-space-5, 24px);
}

.ldrw-root .ldrw-hangar-panel,
.ldrw-root .ldrw-grown-panel {
    background: var(--ldrw-surface, #fff);
    border: 1px solid rgba(19, 39, 67, 0.16);
    border-radius: var(--ldrw-radius-lg, 22px);
    padding: clamp(16px, 4vw, 24px);
    box-shadow: 0 6px 20px rgba(19, 39, 67, 0.08);
}

.ldrw-root .ldrw-hangar-panel {
    background:
        linear-gradient(145deg, rgba(223, 246, 246, 0.62), rgba(255, 255, 255, 0.96) 55%),
        var(--ldrw-surface, #fff);
}

.ldrw-root .ldrw-hangar-message,
.ldrw-root .ldrw-small-note {
    color: var(--ldrw-ink-muted, #4c5d73);
}

.ldrw-root .ldrw-hangar-stats {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
    margin: 16px 0 20px;
}

.ldrw-root .ldrw-hangar-stats > div {
    display: grid;
    gap: 4px;
    min-width: 0;
    padding: 12px;
    border: 1px solid rgba(22, 84, 163, 0.18);
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.9);
}

.ldrw-root .ldrw-hangar-stats span {
    color: var(--ldrw-ink-muted, #4c5d73);
    font-size: 0.85rem;
}

.ldrw-root .ldrw-hangar-stats strong {
    color: var(--ldrw-ink, #132743);
    font-size: clamp(1.3rem, 5vw, 1.8rem);
}

.ldrw-root .ldrw-hangar-rewards {
    display: grid;
    gap: 14px;
}

.ldrw-root .ldrw-hangar-rewards section {
    min-width: 0;
}

.ldrw-root .ldrw-hangar-rewards h4 {
    margin: 0 0 8px;
    color: var(--ldrw-ink, #132743);
    font-size: 1rem;
}

.ldrw-root .ldrw-reward-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.ldrw-root .ldrw-reward-chip,
.ldrw-root .ldrw-reward-empty {
    display: inline-flex;
    align-items: center;
    min-height: 36px;
    padding: 7px 11px;
    border-radius: 999px;
    border: 1px solid rgba(22, 84, 163, 0.22);
    background: #fff;
    color: var(--ldrw-ink, #132743);
    font-size: 0.9rem;
}

.ldrw-root .ldrw-reward-chip::before {
    content: "★";
    margin-inline-end: 6px;
    color: #8a5700;
}

.ldrw-root .ldrw-reward-empty {
    color: var(--ldrw-ink-muted, #4c5d73);
    border-style: dashed;
}

.ldrw-root .ldrw-reward-empty::before {
    content: none;
}

.ldrw-root .ldrw-parent-profile {
    display: grid;
    gap: 10px;
    align-items: end;
}

.ldrw-root .ldrw-parent-summary,
.ldrw-root .ldrw-next-skill,
.ldrw-root .ldrw-misconception-summary,
.ldrw-root .ldrw-reset-area {
    margin-top: 16px;
    padding: 14px;
    border-radius: 16px;
    background: #f7fbff;
    border: 1px solid rgba(19, 39, 67, 0.12);
}

.ldrw-root .ldrw-parent-summary p,
.ldrw-root .ldrw-next-skill p,
.ldrw-root .ldrw-misconception-summary p,
.ldrw-root .ldrw-reset-area p {
    margin: 6px 0 0;
}

.ldrw-root .ldrw-warning-copy {
    color: #8a4b08;
    font-weight: 650;
}

.ldrw-root .ldrw-skill-details {
    margin-top: 16px;
}

.ldrw-root .ldrw-skill-details > summary {
    cursor: pointer;
    font-weight: 700;
    color: var(--ldrw-sapphire, #1654a3);
    min-height: 44px;
    display: flex;
    align-items: center;
}

.ldrw-root .ldrw-skill-report {
    display: grid;
    gap: 10px;
    margin-top: 10px;
}

.ldrw-root .ldrw-skill-card {
    display: grid;
    gap: 6px;
    padding: 12px;
    border: 1px solid rgba(19, 39, 67, 0.12);
    border-radius: 14px;
    background: #fff;
}

.ldrw-root .ldrw-skill-card p,
.ldrw-root .ldrw-skill-card small {
    margin: 0;
}

.ldrw-root .ldrw-skill-card small {
    color: var(--ldrw-ink-muted, #4c5d73);
}

.ldrw-root .ldrw-skill-card__top {
    display: flex;
    gap: 10px;
    justify-content: space-between;
    align-items: flex-start;
}

.ldrw-root .ldrw-skill-state {
    flex: 0 0 auto;
    padding: 4px 8px;
    border-radius: 999px;
    border: 1px solid rgba(104, 66, 184, 0.28);
    color: #6842b8;
    background: #efe8ff;
    font-size: 0.78rem;
    font-weight: 700;
}

.ldrw-root .ldrw-skill-state[data-ldrw-mastery="mastered"] {
    color: #1d6b3c;
    border-color: rgba(29, 107, 60, 0.35);
    background: #e8f7ed;
}

.ldrw-root .ldrw-skill-state[data-ldrw-mastery="ready"] {
    color: #1654a3;
    border-color: rgba(22, 84, 163, 0.3);
    background: #eaf4ff;
}

.ldrw-root .ldrw-reset-confirm {
    margin-top: 12px;
    padding: 12px;
    border: 2px solid #b42318;
    border-radius: 14px;
    background: #fdecea;
}

.ldrw-root .ldrw-inline-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 12px;
}

.ldrw-root .ldrw-button--danger {
    background: #fff;
    color: #b42318;
    border: 2px solid #b42318;
}

.ldrw-root .ldrw-button--danger:hover,
.ldrw-root .ldrw-button--danger:focus-visible {
    background: #fdecea;
}

@media (min-width: 780px) {
    .ldrw-root .ldrw-progress-shell {
        grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
        align-items: start;
    }

    .ldrw-root .ldrw-parent-profile {
        grid-template-columns: minmax(0, 1fr) auto;
    }

    .ldrw-root .ldrw-hangar-rewards,
    .ldrw-root .ldrw-skill-report {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 430px) {
    .ldrw-root .ldrw-hangar-stats {
        grid-template-columns: 1fr;
    }

    .ldrw-root .ldrw-skill-card__top {
        display: grid;
        justify-content: stretch;
    }

    .ldrw-root .ldrw-skill-state {
        justify-self: start;
    }
}

@media (forced-colors: active) {
    .ldrw-root .ldrw-hangar-panel,
    .ldrw-root .ldrw-grown-panel,
    .ldrw-root .ldrw-parent-summary,
    .ldrw-root .ldrw-next-skill,
    .ldrw-root .ldrw-misconception-summary,
    .ldrw-root .ldrw-reset-area,
    .ldrw-root .ldrw-skill-card,
    .ldrw-root .ldrw-reward-chip,
    .ldrw-root .ldrw-reward-empty {
        background: Canvas;
        color: CanvasText;
        border-color: CanvasText;
        box-shadow: none;
    }
}

/* Stage 13 — accessibility, mobile, dialog, motion, contrast, and touch polish. */
.ldrw-root .ldrw-skip-link {
    position: absolute;
    inset-inline-start: 12px;
    inset-block-start: 8px;
    z-index: 20;
    opacity: 0;
    pointer-events: none;
    background: #ffffff;
    color: #132743;
    border: 3px solid #7a3fe3;
    border-radius: 10px;
    padding: 10px 14px;
    font-weight: 800;
    text-decoration: none;
}

.ldrw-root .ldrw-skip-link:focus {
    opacity: 1;
    pointer-events: auto;
}

.ldrw-root button,
.ldrw-root select,
.ldrw-root input[type="text"],
.ldrw-root input[type="number"],
.ldrw-root input[type="range"],
.ldrw-root summary,
.ldrw-root [tabindex]:not([tabindex="-1"]) {
    touch-action: manipulation;
    scroll-margin-block: 20vh;
}

.ldrw-root input[type="range"] {
    min-height: 44px;
}

.ldrw-root select:focus-visible,
.ldrw-root input[type="number"]:focus-visible,
.ldrw-root summary:focus-visible,
.ldrw-root .ldrw-skip-link:focus-visible,
.ldrw-root [role="dialog"]:focus-visible {
    outline: 3px solid var(--ldrw-focus);
    outline-offset: 3px;
}

.ldrw-root .ldrw-access-panel {
    margin-top: 16px;
    padding: 14px;
    border-radius: 16px;
    background: #f7fbff;
    border: 1px solid rgba(19, 39, 67, 0.12);
}

.ldrw-root .ldrw-access-panel > p {
    margin: 6px 0 0;
}

.ldrw-root .ldrw-access-controls {
    display: grid;
    gap: 10px;
    margin-top: 12px;
}

.ldrw-root .ldrw-access-toggle {
    display: grid;
    gap: 5px;
    align-content: end;
}

.ldrw-root .ldrw-access-toggle > span {
    color: var(--ldrw-ink-muted);
    font-size: 13px;
    font-weight: 700;
}

.ldrw-root .ldrw-reset-confirm[role="dialog"] {
    position: fixed;
    z-index: 999999;
    inset: 50% auto auto 50%;
    transform: translate(-50%, -50%);
    width: min(92vw, 520px);
    max-height: min(84vh, 620px);
    overflow: auto;
    padding: 18px;
    box-shadow: 0 0 0 100vmax rgba(19, 39, 67, 0.48), 0 18px 48px rgba(19, 39, 67, 0.28);
}

.ldrw-root[data-ldrw-motion="reduced"] *,
.ldrw-root[data-ldrw-motion="reduced"] *::before,
.ldrw-root[data-ldrw-motion="reduced"] *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
}

.ldrw-root[data-ldrw-motion="reduced"] .ldrw-equivalence[data-ldrw-motion="trade"] {
    animation: none !important;
}

.ldrw-root[data-ldrw-high-contrast="true"] {
    --ldrw-canvas: #ffffff;
    --ldrw-surface: #ffffff;
    --ldrw-surface-soft: #ffffff;
    --ldrw-ink: #000000;
    --ldrw-ink-muted: #202020;
    --ldrw-sapphire: #003f88;
    --ldrw-turquoise: #005b61;
    --ldrw-purple: #4e238f;
    --ldrw-success: #005a24;
    --ldrw-warning: #6a3900;
    --ldrw-error: #8f120a;
    border-color: #000000;
}

.ldrw-root[data-ldrw-high-contrast="true"] .ldrw-session-intro,
.ldrw-root[data-ldrw-high-contrast="true"] .ldrw-session-panel,
.ldrw-root[data-ldrw-high-contrast="true"] .ldrw-mission-panel,
.ldrw-root[data-ldrw-high-contrast="true"] .ldrw-algorithm-panel,
.ldrw-root[data-ldrw-high-contrast="true"] .ldrw-concept-panel,
.ldrw-root[data-ldrw-high-contrast="true"] .ldrw-hangar-panel,
.ldrw-root[data-ldrw-high-contrast="true"] .ldrw-grown-panel,
.ldrw-root[data-ldrw-high-contrast="true"] .ldrw-field,
.ldrw-root[data-ldrw-high-contrast="true"] .ldrw-mission-math,
.ldrw-root[data-ldrw-high-contrast="true"] .ldrw-mission-decision,
.ldrw-root[data-ldrw-high-contrast="true"] .ldrw-mission-hints,
.ldrw-root[data-ldrw-high-contrast="true"] .ldrw-parent-summary,
.ldrw-root[data-ldrw-high-contrast="true"] .ldrw-next-skill,
.ldrw-root[data-ldrw-high-contrast="true"] .ldrw-access-panel,
.ldrw-root[data-ldrw-high-contrast="true"] .ldrw-reset-area,
.ldrw-root[data-ldrw-high-contrast="true"] .ldrw-skill-card,
.ldrw-root[data-ldrw-high-contrast="true"] .ldrw-long-division,
.ldrw-root[data-ldrw-high-contrast="true"] .ldrw-hangar-stats > div {
    background: #ffffff !important;
    color: #000000 !important;
    border-color: #000000 !important;
    box-shadow: none !important;
}

.ldrw-root[data-ldrw-high-contrast="true"] .ldrw-button:not(:disabled) {
    border-color: currentColor;
}

@media (min-width: 720px) {
    .ldrw-root .ldrw-access-controls {
        grid-template-columns: minmax(0, 1fr) minmax(190px, auto);
        align-items: end;
    }
}

@media (max-width: 430px) {
    .ldrw-root .ldrw-reset-confirm[role="dialog"] {
        width: calc(100vw - 24px);
        max-height: calc(100vh - 32px);
        padding: 15px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .ldrw-root:not([data-ldrw-motion="standard"]) *,
    .ldrw-root:not([data-ldrw-motion="standard"]) *::before,
    .ldrw-root:not([data-ldrw-motion="standard"]) *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.001ms !important;
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
    }

    .ldrw-root:not([data-ldrw-motion="standard"]) .ldrw-equivalence[data-ldrw-motion="trade"] {
        animation: none !important;
    }
}

@media (forced-colors: active) {
    .ldrw-root .ldrw-access-panel,
    .ldrw-root .ldrw-reset-confirm[role="dialog"],
    .ldrw-root .ldrw-skip-link {
        background: Canvas;
        color: CanvasText;
        border-color: CanvasText;
        box-shadow: none;
        forced-color-adjust: auto;
    }
}

.ldrw-root { position: relative; }

.ldrw-root .ldrw-balance-panel {
    margin-block: var(--ldrw-space-5, 24px);
    padding: clamp(16px, 3vw, 24px);
    border: 1px solid color-mix(in srgb, var(--ldrw-sapphire, #1654a3) 28%, white);
    border-radius: var(--ldrw-radius-lg, 22px);
    background: linear-gradient(180deg, #f7fbff 0%, #ffffff 100%);
}
.ldrw-root .ldrw-balance-controls {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(180px, 1fr);
    gap: var(--ldrw-space-3, 12px);
    align-items: end;
}
.ldrw-root .ldrw-balance-controls > .ldrw-button {
    min-height: 44px;
}
.ldrw-root .ldrw-balance-summary {
    margin-block: var(--ldrw-space-3, 12px);
    color: var(--ldrw-ink-muted, #4c5d73);
}
.ldrw-root .ldrw-balance-plan {
    display: grid;
    gap: var(--ldrw-space-3, 12px);
}
.ldrw-root .ldrw-balance-step {
    display: grid;
    gap: 4px;
    padding: 12px 14px;
    border: 1px solid #c8d8ea;
    border-radius: var(--ldrw-radius-md, 16px);
    background: #fff;
}
.ldrw-root .ldrw-balance-step[data-ldrw-boss="true"] {
    border-width: 2px;
    border-color: var(--ldrw-gold, #8a5700);
    background: var(--ldrw-gold-soft, #fff4d8);
}
.ldrw-root .ldrw-balance-step__title {
    text-transform: capitalize;
}
.ldrw-root[data-ldrw-high-contrast="true"] .ldrw-balance-panel,
.ldrw-root[data-ldrw-high-contrast="true"] .ldrw-balance-step {
    background: #fff;
    box-shadow: none;
    border-color: currentColor;
}
@media (max-width: 640px) {
    .ldrw-root .ldrw-balance-controls { grid-template-columns: 1fr; }
    .ldrw-root .ldrw-balance-controls > * { min-width: 0; }
}
@media (forced-colors: active) {
    .ldrw-root .ldrw-balance-panel,
    .ldrw-root .ldrw-balance-step { border: 1px solid CanvasText; background: Canvas; }
    .ldrw-root .ldrw-balance-step[data-ldrw-boss="true"] { border-width: 2px; }
}


/* Stage 18 — public-release destination navigation and production-surface contract. */
.ldrw-root .ldrw-primary-nav {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--ldrw-space-2, 8px);
    margin: var(--ldrw-space-3, 12px) 0 var(--ldrw-space-4, 16px);
}
.ldrw-root .ldrw-nav-button {
    min-height: 44px;
    border: 1px solid #b7c9de;
    border-radius: 14px;
    background: #fff;
    color: var(--ldrw-ink, #132743);
    font: inherit;
    font-weight: 700;
    padding: 10px 12px;
    cursor: pointer;
}
.ldrw-root .ldrw-nav-button[aria-current="page"] {
    border-color: var(--ldrw-sapphire, #1654a3);
    background: var(--ldrw-surface-soft, #eaf4ff);
    box-shadow: inset 0 0 0 1px var(--ldrw-sapphire, #1654a3);
}
.ldrw-root .ldrw-nav-button:focus-visible {
    outline: 3px solid var(--ldrw-focus, #7a3fe3);
    outline-offset: 2px;
}
.ldrw-root [data-ldrw-destination-panel][hidden],
.ldrw-root .ldrw-debug-only[hidden] { display: none !important; }
.ldrw-root[data-ldrw-debug="0"] .ldrw-stage-note { margin-top: var(--ldrw-space-4, 16px); }
@media (min-width: 600px) {
    .ldrw-root .ldrw-primary-nav { grid-template-columns: repeat(5, minmax(0, 1fr)); }
}

/* 1.0.1 — Fantasticamos character cameos and simplified production warmth. */
.ldrw-root .ldrw-session-intro {
    grid-template-columns: minmax(0, 1fr);
    overflow: hidden;
    padding: 16px;
}
.ldrw-root .ldrw-session-intro__art {
    align-self: end;
    border-radius: 16px;
    max-height: 190px;
    overflow: hidden;
}
.ldrw-root .ldrw-session-intro__art img {
    display: block;
    width: 100%;
    height: auto;
    object-fit: cover;
    object-position: center 12%;
}
.ldrw-root .ldrw-crew-note {
    display: grid;
    grid-template-columns: 58px minmax(0, 1fr) 84px;
    gap: 10px;
    align-items: center;
    margin: 10px 0 14px;
    padding: 9px 10px;
    border: 1px solid rgba(104, 66, 184, 0.18);
    border-radius: 16px;
    background: linear-gradient(135deg, #fff 0%, #f6f1ff 100%);
}
.ldrw-root .ldrw-crew-note p {
    margin: 0;
    color: var(--ldrw-ink, #132743);
    line-height: 1.35;
    font-size: .94rem;
}
.ldrw-root .ldrw-crew-note__avatar,
.ldrw-root .ldrw-crew-note__scene {
    display: block;
    width: 100%;
    border-radius: 12px;
    object-fit: cover;
}
.ldrw-root .ldrw-crew-note__avatar {
    height: 58px;
    object-position: center top;
}
.ldrw-root .ldrw-crew-note__scene {
    height: 58px;
}
.ldrw-root .ldrw-mission-card {
    overflow: hidden;
}
.ldrw-root .ldrw-mission-scene {
    height: 88px;
    margin: -16px -16px 0;
    background-image: url("../images/scenes/mission-control.webp");
    background-size: cover;
    background-position: center;
    border-bottom: 1px solid rgba(19, 39, 67, 0.12);
}
.ldrw-root .ldrw-mission-card[data-ldrw-mission-kind="sharing_story"] .ldrw-mission-scene,
.ldrw-root .ldrw-mission-card[data-ldrw-mission-kind="grouping_story"] .ldrw-mission-scene {
    background-image: url("../images/scenes/base-ten-bay.webp");
}
.ldrw-root .ldrw-mission-card[data-ldrw-mission-kind="remainder_leftover"] .ldrw-mission-scene,
.ldrw-root .ldrw-mission-card[data-ldrw-mission-kind="remainder_round_up"] .ldrw-mission-scene,
.ldrw-root .ldrw-mission-card[data-ldrw-mission-kind="remainder_full_groups"] .ldrw-mission-scene {
    background-image: url("../images/scenes/remainder-rescue.webp");
}
.ldrw-root .ldrw-mission-card[data-ldrw-mission-kind="multi_step"] .ldrw-mission-scene {
    background-image: url("../images/scenes/launch-pad.webp");
}
.ldrw-root .ldrw-mission-hints {
    grid-template-columns: 54px minmax(0, 1fr);
    align-items: start;
}
.ldrw-root .ldrw-hint-bunny {
    width: 54px;
    height: 54px;
    border-radius: 50%;
    object-fit: cover;
    object-position: center;
    border: 2px solid #fff;
    box-shadow: 0 3px 10px rgba(19, 39, 67, 0.12);
}
.ldrw-root .ldrw-hint-content {
    display: grid;
    gap: 8px;
}
.ldrw-root .ldrw-mission-celebration {
    display: none;
    grid-template-columns: 62px minmax(0, 1fr);
    gap: 10px;
    align-items: center;
    padding: 10px 12px;
    border: 1px solid rgba(138, 87, 0, 0.24);
    border-radius: 14px;
    background: var(--ldrw-gold-soft, #fff4d8);
    color: var(--ldrw-ink, #132743);
}
.ldrw-root .ldrw-mission-celebration img {
    width: 62px;
    height: 58px;
    object-fit: cover;
    border-radius: 12px;
}
.ldrw-root .ldrw-mission-card[data-ldrw-mission-status="complete"] .ldrw-mission-celebration {
    display: grid;
}
.ldrw-root .ldrw-grownup-crew {
    display: grid;
    grid-template-columns: 62px 62px minmax(0, 1fr);
    gap: 8px;
    align-items: center;
    margin: 8px 0 16px;
    padding: 10px;
    border-radius: 16px;
    background: linear-gradient(135deg, #fff8f5, #f6f1ff);
    border: 1px solid rgba(104, 66, 184, 0.16);
}
.ldrw-root .ldrw-grownup-crew img {
    display: block;
    width: 62px;
    height: 70px;
    object-fit: cover;
    object-position: center top;
    border-radius: 12px;
}
.ldrw-root .ldrw-grownup-crew p {
    margin: 0;
    color: var(--ldrw-ink-muted, #4c5d73);
    font-size: .9rem;
    line-height: 1.35;
}
@media (min-width: 720px) {
    .ldrw-root .ldrw-session-intro {
        grid-template-columns: minmax(0, .9fr) minmax(280px, 1.1fr);
        align-items: center;
    }
    .ldrw-root .ldrw-session-intro__art { max-height: 210px; }
    .ldrw-root .ldrw-crew-note { grid-template-columns: 72px minmax(0, 1fr) 110px; }
    .ldrw-root .ldrw-crew-note__avatar { height: 72px; }
    .ldrw-root .ldrw-crew-note__scene { height: 72px; }
    .ldrw-root .ldrw-mission-scene { height: 112px; }
}
@media (max-width: 430px) {
    .ldrw-root .ldrw-crew-note { grid-template-columns: 52px minmax(0, 1fr); }
    .ldrw-root .ldrw-crew-note__scene { display: none; }
    .ldrw-root .ldrw-grownup-crew { grid-template-columns: 54px 54px minmax(0, 1fr); }
    .ldrw-root .ldrw-grownup-crew img { width: 54px; height: 62px; }
}
@media (forced-colors: active) {
    .ldrw-root .ldrw-decorative-art,
    .ldrw-root .ldrw-mission-scene { display: none !important; }
    .ldrw-root .ldrw-crew-note,
    .ldrw-root .ldrw-grownup-crew,
    .ldrw-root .ldrw-mission-celebration {
        grid-template-columns: 1fr;
        background: Canvas;
        color: CanvasText;
        border-color: CanvasText;
    }
}
.ldrw-root[data-ldrw-high-contrast="true"] .ldrw-decorative-art,
.ldrw-root[data-ldrw-high-contrast="true"] .ldrw-mission-scene {
    opacity: .22;
    filter: grayscale(1) contrast(1.35);
}