.integer-number-line-page {
    --inl-teal: #0f766e;
    --inl-teal-dark: #115e59;
    --inl-teal-light: #ccfbf1;
    --inl-navy: #101827;
    --inl-slate: #475569;
    --inl-muted: #64748b;
    --inl-border: #d9e2ec;
    --inl-soft: #f7f9fc;
    --inl-blue: #2563eb;
    --inl-blue-light: #dbeafe;
    --inl-purple: #6d28d9;
    --inl-purple-dark: #5b21b6;
    --inl-green: #15803d;
    --inl-green-light: #dcfce7;
    --inl-red: #b91c1c;
    --inl-red-light: #fee2e2;
    --inl-amber: #b45309;
    --inl-amber-light: #fef3c7;
    --inl-shadow: 0 24px 60px rgba(15, 23, 42, 0.12);
    --inl-card-shadow: 0 10px 28px rgba(15, 23, 42, 0.07);

    color: var(--inl-navy);
    font-family: "Inter", sans-serif;
}

.integer-number-line-page *,
.integer-number-line-page *::before,
.integer-number-line-page *::after {
    box-sizing: border-box;
}

.integer-number-line-page [hidden] {
    display: none !important;
}

.integer-number-line-overview,
.integer-number-line-practice-section,
.integer-number-line-reminders,
.integer-number-line-final-cta {
    padding: 5rem 0;
}

.integer-number-line-overview,
.integer-number-line-reminders {
    background: #ffffff;
}

.integer-number-line-practice-section {
    scroll-margin-top: 1.5rem;
    background:
        radial-gradient(circle at 10% 5%, rgba(15, 118, 110, 0.08), transparent 28rem),
        linear-gradient(180deg, #f7fafc 0%, #eef4f7 100%);
}

.integer-number-line-final-cta {
    background: var(--inl-soft);
}

.integer-number-line-section-heading {
    max-width: 760px;
    margin: 0 auto 2.5rem;
    text-align: center;
}

.integer-number-line-section-heading h2,
.integer-number-line-tool-header h2,
.integer-number-line-final-cta-card h2 {
    margin: 0;
    color: var(--inl-navy);
    font-weight: 800;
    letter-spacing: -0.035em;
}

.integer-number-line-eyebrow {
    margin: 0 0 0.65rem;
    color: var(--inl-teal);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

/* Overview */
.integer-number-line-overview-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1rem;
}

.integer-number-line-overview-card {
    position: relative;
    min-height: 100%;
    border: 1px solid var(--inl-border);
    border-radius: 1rem;
    background: #ffffff;
    padding: 1.45rem;
    box-shadow: var(--inl-card-shadow);
}

.integer-number-line-overview-card h3 {
    margin: 1rem 0 0.55rem;
    color: var(--inl-navy);
    font-size: 1.04rem;
    font-weight: 800;
    line-height: 1.35;
}

.integer-number-line-overview-card p {
    margin: 0;
    color: var(--inl-slate);
    font-size: 0.93rem;
    line-height: 1.65;
}

.integer-number-line-step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.35rem;
    height: 2.35rem;
    border-radius: 0.75rem;
    background: var(--inl-teal);
    color: #ffffff;
    font-size: 0.95rem;
    font-weight: 800;
    box-shadow: 0 8px 18px rgba(15, 118, 110, 0.2);
}

/* Main tool shell */
.integer-number-line-tool {
    width: min(100%, 1120px);
    margin: 0 auto;
    overflow: hidden;
    border: 1px solid #cfdbe5;
    border-radius: 1.4rem;
    background: #ffffff;
    box-shadow: var(--inl-shadow);
}

.integer-number-line-tool-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
    padding: 2rem 2.25rem;
    border-bottom: 1px solid var(--inl-border);
}

.integer-number-line-tool-header h2 {
    font-size: clamp(1.6rem, 3vw, 2.1rem);
}

.integer-number-line-scoreboard {
    display: grid;
    grid-template-columns: repeat(3, minmax(76px, 1fr));
    overflow: hidden;
    border: 1px solid var(--inl-border);
    border-radius: 0.9rem;
    background: var(--inl-soft);
}

.integer-number-line-score-item {
    min-width: 82px;
    padding: 0.7rem 0.85rem;
    text-align: center;
}

.integer-number-line-score-item + .integer-number-line-score-item {
    border-left: 1px solid var(--inl-border);
}

.integer-number-line-score-label {
    display: block;
    margin-bottom: 0.12rem;
    color: var(--inl-muted);
    font-size: 0.68rem;
    font-weight: 800;
    letter-spacing: 0.075em;
    text-transform: uppercase;
}

.integer-number-line-score-item strong {
    color: var(--inl-navy);
    font-size: 1.25rem;
    font-variant-numeric: tabular-nums;
}

/* Settings */
.integer-number-line-settings {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr) auto;
    gap: 1rem;
    align-items: end;
    padding: 1.35rem 2.25rem;
    border-bottom: 1px solid var(--inl-border);
    background: #fbfcfe;
}

.integer-number-line-setting-group {
    min-width: 0;
}

.integer-number-line-setting-group label {
    display: block;
    margin-bottom: 0.45rem;
    color: #334155;
    font-size: 0.78rem;
    font-weight: 800;
}

.integer-number-line-settings .form-select {
    min-height: 47px;
    border-color: #cbd7e3;
    border-radius: 0.72rem;
    color: var(--inl-navy);
    font-size: 0.9rem;
    font-weight: 600;
    box-shadow: none;
}

.integer-number-line-settings .form-select:focus {
    border-color: var(--inl-teal);
    box-shadow: 0 0 0 0.2rem rgba(15, 118, 110, 0.14);
}

.integer-number-line-settings #newProblemButton {
    min-height: 47px;
    white-space: nowrap;
}

/* Problem */
.integer-number-line-problem-area {
    padding: 2.25rem 2.25rem 2rem;
    border-bottom: 1px solid var(--inl-border);
    background:
        linear-gradient(135deg, rgba(15, 118, 110, 0.06), transparent 48%),
        #ffffff;
    text-align: center;
}

.integer-number-line-problem-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.integer-number-line-problem-label {
    margin: 0;
    color: var(--inl-teal);
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.integer-number-line-difficulty-badge {
    display: inline-flex;
    align-items: center;
    min-height: 1.75rem;
    border-radius: 999px;
    padding: 0.25rem 0.65rem;
    background: var(--inl-blue-light);
    color: #1e40af;
    font-size: 0.7rem;
    font-weight: 800;
}

.integer-number-line-difficulty-badge.easy {
    background: var(--inl-green-light);
    color: #166534;
}

.integer-number-line-difficulty-badge.hard {
    background: var(--inl-amber-light);
    color: #92400e;
}

.integer-number-line-problem-expression {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.55em;
    color: var(--inl-navy);
    font-size: clamp(2.55rem, 7vw, 4.4rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.04em;
    font-variant-numeric: tabular-nums;
}

.integer-number-line-question-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.05em;
    height: 1.05em;
    border-radius: 0.25em;
    background: var(--inl-teal-light);
    color: var(--inl-teal-dark);
}

.integer-number-line-problem-instruction {
    max-width: 650px;
    margin: 1.15rem auto 0;
    color: var(--inl-slate);
    font-size: 1rem;
    line-height: 1.65;
}

/* Workspace and status */
.integer-number-line-workspace {
    padding: 2rem 2.25rem 2.4rem;
}

.integer-number-line-status-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.8rem;
    margin-bottom: 1rem;
}

.integer-number-line-status-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    min-width: 0;
    border: 1px solid var(--inl-border);
    border-radius: 0.8rem;
    background: #ffffff;
    padding: 0.8rem 1rem;
}

.integer-number-line-status-card span {
    color: var(--inl-muted);
    font-size: 0.74rem;
    font-weight: 800;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.integer-number-line-status-card strong,
.integer-number-line-status-card strong span {
    color: var(--inl-navy);
    font-size: 1.13rem;
    font-weight: 800;
    letter-spacing: 0;
    text-transform: none;
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
}

/* Number-line visual */
.integer-number-line-visual-card {
    overflow: hidden;
    border: 1px solid #bfd6d4;
    border-radius: 1rem;
    background: #f7fcfb;
}

.integer-number-line-visual-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.25rem;
    padding: 1rem 1.15rem;
    border-bottom: 1px solid #d5e7e5;
}

.integer-number-line-visual-label {
    margin: 0 0 0.15rem;
    color: var(--inl-navy);
    font-size: 0.8rem;
    font-weight: 800;
}

.integer-number-line-visual-instruction {
    margin: 0;
    color: var(--inl-muted);
    font-size: 0.84rem;
}

.integer-number-line-movement-rule {
    flex: 0 1 380px;
    border-radius: 0.7rem;
    background: var(--inl-teal-light);
    color: var(--inl-teal-dark);
    padding: 0.58rem 0.8rem;
    font-size: 0.8rem;
    font-weight: 800;
    line-height: 1.4;
    text-align: center;
}

.integer-number-line-viewport {
    position: relative;
    overflow-x: auto;
    overflow-y: hidden;
    width: 100%;
    border-bottom: 1px solid #d5e7e5;
    background: #ffffff;
    scrollbar-color: #8dbbb7 #edf7f6;
    scrollbar-width: thin;
    overscroll-behavior-x: contain;
    -webkit-overflow-scrolling: touch;
}

.integer-number-line-viewport::-webkit-scrollbar {
    height: 10px;
}

.integer-number-line-viewport::-webkit-scrollbar-track {
    background: #edf7f6;
}

.integer-number-line-viewport::-webkit-scrollbar-thumb {
    border: 2px solid #edf7f6;
    border-radius: 999px;
    background: #8dbbb7;
}

.integer-number-line-canvas {
    --inl-axis-y: 128px;
    --inl-canvas-padding: 50px;
    position: relative;
    width: 100%;
    min-width: 880px;
    height: 210px;
    margin: 0 auto;
    user-select: none;
    touch-action: pan-x;
}

.integer-number-line-axis {
    position: absolute;
    z-index: 1;
    top: var(--inl-axis-y);
    right: calc(var(--inl-canvas-padding) - 7px);
    left: calc(var(--inl-canvas-padding) - 7px);
    height: 4px;
    border-radius: 999px;
    background: var(--inl-navy);
}

.integer-number-line-axis::before,
.integer-number-line-axis::after {
    position: absolute;
    top: 50%;
    width: 0;
    height: 0;
    border-top: 7px solid transparent;
    border-bottom: 7px solid transparent;
    content: "";
    transform: translateY(-50%);
}

.integer-number-line-axis::before {
    left: -1px;
    border-right: 11px solid var(--inl-navy);
}

.integer-number-line-axis::after {
    right: -1px;
    border-left: 11px solid var(--inl-navy);
}

.integer-number-line-ticks {
    position: absolute;
    z-index: 2;
    inset: 0;
    pointer-events: none;
}

.integer-number-line-tick {
    position: absolute;
    top: calc(var(--inl-axis-y) - 13px);
    width: 46px;
    color: #475569;
    text-align: center;
    transform: translateX(-50%);
}

.integer-number-line-tick-mark {
    display: block;
    width: 3px;
    height: 29px;
    margin: 0 auto;
    border-radius: 999px;
    background: #64748b;
}

.integer-number-line-tick-label {
    display: block;
    margin-top: 0.48rem;
    color: #334155;
    font-size: 0.78rem;
    font-weight: 700;
    line-height: 1;
    font-variant-numeric: tabular-nums;
}

.integer-number-line-tick.is-zero .integer-number-line-tick-mark {
    width: 4px;
    height: 35px;
    margin-top: -3px;
    background: var(--inl-navy);
}

.integer-number-line-tick.is-zero .integer-number-line-tick-label {
    color: var(--inl-navy);
    font-weight: 900;
}

.integer-number-line-tick.is-start .integer-number-line-tick-label {
    color: var(--inl-blue);
}

.integer-number-line-tick.is-current .integer-number-line-tick-label {
    color: var(--inl-teal-dark);
    font-weight: 900;
}

.integer-number-line-jump-layer {
    position: absolute;
    z-index: 3;
    inset: 0;
    display: block;
    width: 100%;
    height: 100%;
    overflow: visible;
    pointer-events: none;
}

#integerJumpArrow path {
    fill: var(--inl-teal);
}

.integer-number-line-jump-path {
    fill: none;
    stroke: var(--inl-teal);
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-width: 4;
    vector-effect: non-scaling-stroke;
    animation: integer-number-line-draw-jump 0.32s ease-out both;
}

.integer-number-line-jump-path.is-left {
    stroke: var(--inl-purple);
}

.integer-number-line-jump-path.is-right {
    stroke: var(--inl-teal);
}

.integer-number-line-jump-path.is-latest {
    stroke-width: 5;
    filter: drop-shadow(0 2px 2px rgba(15, 23, 42, 0.16));
}

.integer-number-line-point {
    position: absolute;
    z-index: 5;
    top: calc(var(--inl-axis-y) + 2px);
    left: 50%;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
}

.integer-number-line-start-point {
    width: 31px;
    height: 31px;
    border: 5px solid var(--inl-blue);
    background: #ffffff;
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.14);
}

.integer-number-line-current-point {
    width: 19px;
    height: 19px;
    border: 3px solid #ffffff;
    background: var(--inl-teal);
    box-shadow:
        0 0 0 4px rgba(15, 118, 110, 0.17),
        0 4px 10px rgba(15, 23, 42, 0.18);
    transition: left 0.24s ease;
}

.integer-number-line-correct-point {
    width: 27px;
    height: 27px;
    border: 5px solid #ffffff;
    background: var(--inl-green);
    box-shadow:
        0 0 0 4px rgba(21, 128, 61, 0.22),
        0 5px 12px rgba(15, 23, 42, 0.18);
    animation: integer-number-line-point-pop 0.38s ease-out both;
}

.integer-number-line-current-point.is-incorrect {
    background: var(--inl-red);
    box-shadow: 0 0 0 4px rgba(185, 28, 28, 0.18);
    animation: integer-number-line-shake 0.42s ease-in-out;
}

.integer-number-line-legend {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.7rem 1.4rem;
    padding: 0.8rem 1rem;
}

.integer-number-line-legend-item {
    display: inline-flex;
    align-items: center;
    gap: 0.42rem;
    color: var(--inl-slate);
    font-size: 0.76rem;
    font-weight: 700;
}

.integer-number-line-legend-dot {
    display: inline-block;
    width: 0.72rem;
    height: 0.72rem;
    flex: 0 0 auto;
    border-radius: 50%;
}

.integer-number-line-legend-dot-start {
    border: 3px solid var(--inl-blue);
    background: #ffffff;
}

.integer-number-line-legend-dot-current {
    background: var(--inl-teal);
}

.integer-number-line-legend-dot-correct {
    background: var(--inl-green);
}

/* Controls */
.integer-number-line-movement-controls {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.9rem;
    max-width: 760px;
    margin: 1.25rem auto 0;
}

.integer-number-line-move-button.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.55rem;
    min-height: 58px;
    border: 0;
    border-radius: 0.85rem;
    color: #ffffff;
    font-size: 1rem;
    font-weight: 800;
    box-shadow: 0 10px 22px rgba(15, 23, 42, 0.14);
    transition:
        transform 0.18s ease,
        box-shadow 0.18s ease,
        background-color 0.18s ease;
}

.integer-number-line-move-left.btn {
    background: var(--inl-purple);
}

.integer-number-line-move-left.btn:hover,
.integer-number-line-move-left.btn:focus-visible {
    background: var(--inl-purple-dark);
    color: #ffffff;
}

.integer-number-line-move-right.btn {
    background: var(--inl-teal);
}

.integer-number-line-move-right.btn:hover,
.integer-number-line-move-right.btn:focus-visible {
    background: var(--inl-teal-dark);
    color: #ffffff;
}

.integer-number-line-move-button.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 26px rgba(15, 23, 42, 0.18);
}

.integer-number-line-move-button.btn:active {
    transform: translateY(0);
}

.integer-number-line-move-button.btn:disabled {
    cursor: not-allowed;
    opacity: 0.48;
    transform: none;
    box-shadow: none;
}

.integer-number-line-move-button svg {
    width: 1.15rem;
    height: 1.15rem;
}

.integer-number-line-secondary-controls {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.7rem;
    margin-top: 1rem;
}

.integer-number-line-secondary-controls .btn {
    min-width: 145px;
    border-radius: 0.72rem;
}

.integer-number-line-page .btn-outline-teal:disabled {
    cursor: not-allowed;
    opacity: 0.48;
}

/* Feedback and hint */
.integer-number-line-feedback {
    max-width: 760px;
    margin: 1rem auto 0;
    border: 1px solid #bfdbfe;
    border-radius: 0.8rem;
    background: #eff6ff;
    color: #1e3a8a;
    padding: 0.9rem 1rem;
    font-size: 0.92rem;
    font-weight: 700;
    line-height: 1.55;
    text-align: center;
}

.integer-number-line-feedback.success {
    border-color: #86efac;
    background: var(--inl-green-light);
    color: #166534;
}

.integer-number-line-feedback.error {
    border-color: #fecaca;
    background: var(--inl-red-light);
    color: #991b1b;
}

.integer-number-line-feedback.info {
    border-color: #bfdbfe;
    background: #eff6ff;
    color: #1e40af;
}

.integer-number-line-hint-button {
    display: block;
    margin: 1.05rem auto 0;
    border: 0;
    border-bottom: 1px solid currentColor;
    background: transparent;
    color: var(--inl-teal);
    padding: 0.12rem 0;
    font-size: 0.88rem;
    font-weight: 800;
}

.integer-number-line-hint-button:hover,
.integer-number-line-hint-button:focus-visible {
    color: var(--inl-teal-dark);
}

.integer-number-line-hint {
    max-width: 760px;
    margin: 0.9rem auto 0;
    border-left: 4px solid var(--inl-amber);
    border-radius: 0.75rem;
    background: #fffbeb;
    color: #78350f;
    padding: 1rem 1.1rem;
    font-size: 0.92rem;
    line-height: 1.6;
}

.integer-number-line-hint p:last-child {
    margin-bottom: 0;
}

/* Completion */
.integer-number-line-completion {
    max-width: 760px;
    margin: 1.35rem auto 0;
    border: 1px solid #86efac;
    border-radius: 1rem;
    background:
        radial-gradient(circle at 50% 0, rgba(34, 197, 94, 0.12), transparent 12rem),
        #f0fdf4;
    padding: 1.65rem;
    text-align: center;
}

.integer-number-line-completion-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 3.25rem;
    height: 3.25rem;
    margin-bottom: 0.8rem;
    border-radius: 50%;
    background: var(--inl-green);
    color: #ffffff;
    font-size: 1.5rem;
    font-weight: 900;
    box-shadow: 0 8px 20px rgba(21, 128, 61, 0.22);
}

.integer-number-line-completion h3 {
    margin: 0 0 0.4rem;
    color: #14532d;
    font-size: 1.45rem;
    font-weight: 800;
}

.integer-number-line-completion > p {
    margin: 0;
    color: #166534;
}

.integer-number-line-final-answer {
    max-width: 460px;
    margin: 1rem auto;
    border-radius: 0.78rem;
    background: var(--inl-navy);
    color: #ffffff;
    padding: 0.9rem 1rem;
    font-size: clamp(1.35rem, 4vw, 1.8rem);
    font-weight: 800;
    font-variant-numeric: tabular-nums;
}

.integer-number-line-completion-explanation {
    max-width: 620px;
    margin: 0 auto 1.15rem !important;
    color: #166534 !important;
    line-height: 1.65;
}

/* Reminder cards */
.integer-number-line-reminders-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1rem;
}

.integer-number-line-reminder-card {
    display: flex;
    flex-direction: column;
    min-height: 100%;
    border: 1px solid var(--inl-border);
    border-top: 4px solid var(--inl-teal);
    border-radius: 1rem;
    background: #ffffff;
    padding: 1.35rem;
    box-shadow: var(--inl-card-shadow);
}

.integer-number-line-reminder-card:nth-child(2),
.integer-number-line-reminder-card:nth-child(3) {
    border-top-color: var(--inl-purple);
}

.integer-number-line-reminder-card h3 {
    margin: 0 0 0.65rem;
    color: var(--inl-navy);
    font-size: 1rem;
    font-weight: 800;
    line-height: 1.4;
}

.integer-number-line-reminder-card p {
    margin: 0 0 1rem;
    color: var(--inl-slate);
    font-size: 0.9rem;
    line-height: 1.65;
}

.integer-number-line-example {
    margin-top: auto;
    border-radius: 0.7rem;
    background: var(--inl-navy);
    color: #ffffff;
    padding: 0.75rem;
    font-size: 1.02rem;
    font-weight: 800;
    text-align: center;
    font-variant-numeric: tabular-nums;
}

/* Final CTA */
.integer-number-line-final-cta-card {
    max-width: 960px;
    margin: 0 auto;
    border-radius: 1.25rem;
    background:
        radial-gradient(circle at 100% 0, rgba(45, 212, 191, 0.2), transparent 22rem),
        var(--inl-navy);
    color: #ffffff;
    padding: 2.3rem;
    text-align: center;
    box-shadow: var(--inl-shadow);
}

.integer-number-line-final-cta-card .integer-number-line-eyebrow {
    color: #5eead4;
}

.integer-number-line-final-cta-card h2 {
    color: #ffffff;
    font-size: clamp(1.7rem, 4vw, 2.35rem);
}

.integer-number-line-final-cta-card p:not(.integer-number-line-eyebrow) {
    max-width: 720px;
    margin: 1rem auto 1.4rem;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.7;
}

/* Keyboard focus */
.integer-number-line-page button:focus-visible,
.integer-number-line-page select:focus-visible,
.integer-number-line-page a:focus-visible {
    outline: 3px solid rgba(45, 212, 191, 0.5);
    outline-offset: 3px;
}

@keyframes integer-number-line-draw-jump {
    from {
        opacity: 0;
        stroke-dasharray: 180;
        stroke-dashoffset: 180;
    }

    to {
        opacity: 1;
        stroke-dasharray: 180;
        stroke-dashoffset: 0;
    }
}

@keyframes integer-number-line-point-pop {
    0% {
        opacity: 0;
        transform: translate(-50%, -50%) scale(0.45);
    }

    70% {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1.16);
    }

    100% {
        transform: translate(-50%, -50%) scale(1);
    }
}

@keyframes integer-number-line-shake {
    0%,
    100% {
        transform: translate(-50%, -50%);
    }

    25% {
        transform: translate(calc(-50% - 6px), -50%);
    }

    75% {
        transform: translate(calc(-50% + 6px), -50%);
    }
}

@media (max-width: 991.98px) {
    .integer-number-line-overview-grid,
    .integer-number-line-reminders-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .integer-number-line-tool-header {
        align-items: flex-start;
    }

    .integer-number-line-settings {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .integer-number-line-settings #newProblemButton {
        grid-column: 1 / -1;
        justify-self: start;
    }

    .integer-number-line-visual-header {
        align-items: flex-start;
        flex-direction: column;
    }

    .integer-number-line-movement-rule {
        flex-basis: auto;
        width: 100%;
    }
}

@media (max-width: 767.98px) {
    .integer-number-line-overview,
    .integer-number-line-practice-section,
    .integer-number-line-reminders,
    .integer-number-line-final-cta {
        padding: 3.6rem 0;
    }

    .integer-number-line-tool {
        border-radius: 1rem;
    }

    .integer-number-line-tool-header {
        flex-direction: column;
        gap: 1.25rem;
        padding: 1.5rem;
    }

    .integer-number-line-scoreboard {
        width: 100%;
    }

    .integer-number-line-score-item {
        min-width: 0;
        padding-inline: 0.5rem;
    }

    .integer-number-line-settings {
        grid-template-columns: 1fr;
        padding: 1.25rem 1.5rem;
    }

    .integer-number-line-settings #newProblemButton {
        grid-column: auto;
        width: 100%;
    }

    .integer-number-line-problem-area {
        padding: 1.75rem 1.25rem 1.5rem;
    }

    .integer-number-line-workspace {
        padding: 1.4rem 1.25rem 1.75rem;
    }

    .integer-number-line-status-grid {
        grid-template-columns: 1fr;
        gap: 0.6rem;
    }

    .integer-number-line-visual-header {
        padding: 0.9rem 1rem;
    }

    .integer-number-line-canvas {
        min-width: 800px;
    }

    .integer-number-line-legend {
        align-items: flex-start;
        flex-direction: column;
        padding-inline: 1.15rem;
    }

    .integer-number-line-movement-controls {
        grid-template-columns: 1fr;
    }

    .integer-number-line-secondary-controls {
        display: grid;
        grid-template-columns: 1fr;
    }

    .integer-number-line-secondary-controls .btn {
        width: 100%;
    }

    .integer-number-line-completion {
        padding: 1.35rem 1rem;
    }

    .integer-number-line-final-cta-card {
        padding: 1.8rem 1.25rem;
    }
}

@media (max-width: 575.98px) {
    .integer-number-line-overview-grid,
    .integer-number-line-reminders-grid {
        grid-template-columns: 1fr;
    }

    .integer-number-line-overview-card,
    .integer-number-line-reminder-card {
        padding: 1.2rem;
    }

    .integer-number-line-problem-header {
        align-items: center;
        flex-direction: column;
        gap: 0.45rem;
    }

    .integer-number-line-problem-expression {
        gap: 0.38em;
    }

    .integer-number-line-canvas {
        min-width: 760px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .integer-number-line-page *,
    .integer-number-line-page *::before,
    .integer-number-line-page *::after {
        scroll-behavior: auto !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}