/* =========================================================
   Decimal Place Value Practice
   File:
   /interactive-learning-tools/decimal-place-value/
   decimal-place-value.css
   ========================================================= */

.decimal-place-value-page {
    font-family: "Inter", sans-serif;
    background: #ffffff;
    color: #1f2937;
}

.decimal-place-value-page *,
.decimal-place-value-page *::before,
.decimal-place-value-page *::after {
    box-sizing: border-box;
}


/* =========================================================
   Shared section styles
   ========================================================= */

.decimal-place-value-overview,
.decimal-place-value-tool-section,
.decimal-place-value-reminders,
.decimal-place-value-chart-section,
.decimal-place-value-final-cta {
    padding: 5rem 0;
}

.decimal-place-value-overview,
.decimal-place-value-reminders {
    background: #f7f9fc;
}

.decimal-place-value-tool-section,
.decimal-place-value-chart-section,
.decimal-place-value-final-cta {
    background: #ffffff;
}

.decimal-place-value-section-heading {
    max-width: 760px;
    margin: 0 auto 2.25rem;
    text-align: center;
}

.decimal-place-value-section-heading h2 {
    margin-bottom: 1rem;
    color: #101827;
    font-size: clamp(1.75rem, 3vw, 2.4rem);
    font-weight: 800;
}

.decimal-place-value-section-heading > p:last-child {
    margin-bottom: 0;
    color: #5b6678;
    font-size: 1.05rem;
    line-height: 1.75;
}

.decimal-place-value-eyebrow {
    margin-bottom: 0.65rem;
    color: #0f766e;
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}


/* =========================================================
   Overview cards
   ========================================================= */

.decimal-place-value-overview-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1rem;
}

.decimal-place-value-overview-card {
    min-height: 100%;
    border: 1px solid #dce3eb;
    border-radius: 1rem;
    background: #ffffff;
    padding: 1.5rem;
    box-shadow: 0 12px 30px rgba(16, 24, 39, 0.05);
}

.decimal-place-value-overview-card h3 {
    margin-bottom: 0.75rem;
    color: #101827;
    font-size: 1.1rem;
    font-weight: 800;
}

.decimal-place-value-overview-card p {
    margin-bottom: 0;
    color: #5b6678;
    line-height: 1.65;
}

.decimal-place-value-step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.65rem;
    height: 2.65rem;
    margin-bottom: 1rem;
    border-radius: 50%;
    background: #0f766e;
    color: #ffffff;
    font-weight: 800;
}


/* =========================================================
   Tool shell
   ========================================================= */

.decimal-place-value-tool-section .container {
    max-width: 1180px;
}

.decimal-place-value-tool-section {
    background: #ffffff;
}

.decimal-place-value-tool-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
    max-width: 1080px;
    margin: 0 auto;
    border: 1px solid #dce3eb;
    border-bottom: 0;
    border-radius: 1.25rem 1.25rem 0 0;
    background: #101827;
    color: #ffffff;
    padding: 1.75rem 2rem;
}

.decimal-place-value-tool-header h2 {
    margin-bottom: 0.45rem;
    color: #ffffff;
    font-size: clamp(1.45rem, 3vw, 2rem);
    font-weight: 800;
}

.decimal-place-value-tool-header p:last-child {
    max-width: 680px;
    margin-bottom: 0;
    color: rgba(255, 255, 255, 0.76);
    line-height: 1.65;
}

.decimal-place-value-tool-header
.decimal-place-value-eyebrow {
    color: #5eead4;
}


/* =========================================================
   Buttons
   ========================================================= */

.decimal-place-value-page .btn-teal {
    border-color: #0f766e;
    background: #0f766e;
    color: #ffffff;
}

.decimal-place-value-page .btn-teal:hover,
.decimal-place-value-page .btn-teal:focus {
    border-color: #0b5f59;
    background: #0b5f59;
    color: #ffffff;
}

.decimal-place-value-page .btn-outline-teal {
    border-color: #0f766e;
    color: #0f766e;
}

.decimal-place-value-page .btn-outline-teal:hover,
.decimal-place-value-page .btn-outline-teal:focus {
    border-color: #0f766e;
    background: #0f766e;
    color: #ffffff;
}

#newProblemButton {
    flex: 0 0 auto;
    min-height: 3rem;
    white-space: nowrap;
}


/* =========================================================
   Scoreboard
   ========================================================= */

.decimal-place-value-scoreboard {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
    max-width: 1080px;
    margin: 0 auto;
    border-right: 1px solid #dce3eb;
    border-left: 1px solid #dce3eb;
    background: #f7f9fc;
    padding: 1.25rem 2rem;
}

.decimal-place-value-score-card {
    border: 1px solid #dce3eb;
    border-radius: 0.85rem;
    background: #ffffff;
    padding: 1rem;
    text-align: center;
}

.decimal-place-value-score-label {
    display: block;
    margin-bottom: 0.25rem;
    color: #657184;
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.decimal-place-value-score-value {
    display: block;
    color: #101827;
    font-size: 1.55rem;
    font-weight: 800;
}


/* =========================================================
   Settings
   ========================================================= */

.decimal-place-value-settings {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
    max-width: 1080px;
    margin: 0 auto;
    border-right: 1px solid #dce3eb;
    border-bottom: 1px solid #dce3eb;
    border-left: 1px solid #dce3eb;
    background: #f7f9fc;
    padding: 0 2rem 1.5rem;
}

.decimal-place-value-setting label {
    margin-bottom: 0.45rem;
    color: #273449;
    font-size: 0.9rem;
    font-weight: 700;
}

.decimal-place-value-setting .form-select {
    min-height: 3rem;
    border-color: #cfd8e3;
    border-radius: 0.75rem;
    background-color: #ffffff;
}

.decimal-place-value-setting .form-select:focus {
    border-color: #0f766e;
    box-shadow: 0 0 0 0.2rem rgba(15, 118, 110, 0.14);
}


/* =========================================================
   Main tool body
   ========================================================= */

.decimal-place-value-progress,
.decimal-place-value-problem,
.decimal-place-value-step-card,
.decimal-place-value-hint,
.decimal-place-value-feedback,
.decimal-place-value-tool-buttons,
.decimal-place-value-completion {
    max-width: 1080px;
    margin-right: auto;
    margin-left: auto;
}

.decimal-place-value-progress {
    border-right: 1px solid #dce3eb;
    border-left: 1px solid #dce3eb;
}

.decimal-place-value-problem {
    border-right: 1px solid #dce3eb;
    border-left: 1px solid #dce3eb;
}

.decimal-place-value-step-card,
.decimal-place-value-hint,
.decimal-place-value-feedback,
.decimal-place-value-tool-buttons,
.decimal-place-value-completion {
    position: relative;
}

.decimal-place-value-step-card:first-of-type {
    border-radius: 0;
}

/* =========================================================
   Progress tracker
   ========================================================= */

.decimal-place-value-progress {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    background: #ffffff;
    padding: 1.75rem 2rem;
}

.decimal-place-value-progress-step {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.6rem;
    height: 2.6rem;
    border: 2px solid #cfd8e3;
    border-radius: 50%;
    background: #ffffff;
    color: #7a8698;
    font-weight: 800;
    transition:
        border-color 0.2s ease,
        background 0.2s ease,
        color 0.2s ease,
        transform 0.2s ease;
}

.decimal-place-value-progress-step.active {
    border-color: #0f766e;
    background: #0f766e;
    color: #ffffff;
    transform: scale(1.06);
}

.decimal-place-value-progress-step.complete {
    border-color: #0f766e;
    background: #dff7f3;
    color: #0f766e;
}

.decimal-place-value-progress-line {
    width: 110px;
    height: 3px;
    background: #d8e0e9;
}

.decimal-place-value-progress-line.complete {
    background: #0f766e;
}


/* =========================================================
   Decimal problem display
   ========================================================= */

.decimal-place-value-problem {
    border-bottom: 1px solid #dce3eb;
    background: #ffffff;
    padding: 2.4rem 2rem;
    text-align: center;
}

.decimal-place-value-display {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    min-height: 5.5rem;
    margin-bottom: 1rem;
    color: #101827;
    font-size: clamp(2.4rem, 7vw, 4.5rem);
    font-weight: 800;
    letter-spacing: 0.06em;
    line-height: 1.2;
}

.decimal-place-value-digit {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 0.7em;
    padding: 0.04em 0.06em;
    border-radius: 0.18em;
}

.decimal-place-value-digit.highlighted {
    background: #ccfbf1;
    color: #0f766e;
    box-shadow:
        0 0 0 3px rgba(15, 118, 110, 0.15),
        0 8px 20px rgba(15, 118, 110, 0.12);
}

.decimal-place-value-digit.highlighted::after {
    position: absolute;
    right: 10%;
    bottom: -0.18em;
    left: 10%;
    height: 0.08em;
    border-radius: 999px;
    background: #0f766e;
    content: "";
}

.decimal-place-value-decimal-point {
    display: inline-flex;
    align-items: flex-end;
    justify-content: center;
    min-width: 0.35em;
    color: #101827;
}

.decimal-place-value-instruction {
    max-width: 720px;
    margin: 0 auto;
    color: #5b6678;
    font-size: 1rem;
    line-height: 1.7;
}


/* =========================================================
   Step cards
   ========================================================= */

.decimal-place-value-step-card {
    border-right: 1px solid #dce3eb;
    border-bottom: 1px solid #dce3eb;
    border-left: 1px solid #dce3eb;
    background: #ffffff;
    padding: 2rem;
}

.decimal-place-value-step-card[hidden] {
    display: none;
}

.decimal-place-value-step-card.active {
    background: #ffffff;
}

.decimal-place-value-step-card.complete {
    background: #f7fdf9;
}

.decimal-place-value-step-card:last-of-type {
    border-radius: 0 0 1.25rem 1.25rem;
}

.decimal-place-value-step-header {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    margin-bottom: 1rem;
}

.decimal-place-value-step-header h3 {
    margin-bottom: 0;
    color: #101827;
    font-size: clamp(1.3rem, 3vw, 1.75rem);
    font-weight: 800;
}

.decimal-place-value-step-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
    min-width: 4.75rem;
    min-height: 2rem;
    border-radius: 999px;
    background: #ecfdf8;
    color: #0f766e;
    padding: 0.35rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.07em;
    text-transform: uppercase;
}

.decimal-place-value-step-card > p {
    max-width: 720px;
    margin-bottom: 1.35rem;
    color: #5b6678;
    line-height: 1.7;
}


/* =========================================================
   Step controls
   ========================================================= */

.decimal-place-value-select {
    max-width: 420px;
    min-height: 3.2rem;
    border-color: #cfd8e3;
    border-radius: 0.75rem;
}

.decimal-place-value-select:focus {
    border-color: #0f766e;
    box-shadow: 0 0 0 0.22rem rgba(15, 118, 110, 0.14);
}

.decimal-place-value-input {
    max-width: 420px;
    min-height: 3.2rem;
    border-color: #cfd8e3;
    border-radius: 0.75rem;
    font-size: 1.1rem;
    font-weight: 700;
}

.decimal-place-value-input:focus {
    border-color: #0f766e;
    box-shadow: 0 0 0 0.22rem rgba(15, 118, 110, 0.14);
}

.decimal-place-value-expanded-input {
    max-width: 680px;
    min-height: 7rem;
    border-color: #cfd8e3;
    border-radius: 0.75rem;
    font-size: 1.05rem;
    line-height: 1.6;
    resize: vertical;
}

.decimal-place-value-expanded-input:focus {
    border-color: #0f766e;
    box-shadow: 0 0 0 0.22rem rgba(15, 118, 110, 0.14);
}


/* =========================================================
   Correct and incorrect control states
   ========================================================= */

.decimal-place-value-select.is-correct,
.decimal-place-value-input.is-correct,
.decimal-place-value-expanded-input.is-correct,
.decimal-place-value-fraction-inputs
.form-control.is-correct {
    border-color: #15803d;
    background-color: #f0fdf4;
}

.decimal-place-value-select.is-incorrect,
.decimal-place-value-input.is-incorrect,
.decimal-place-value-expanded-input.is-incorrect,
.decimal-place-value-fraction-inputs
.form-control.is-incorrect {
    border-color: #dc2626;
    background-color: #fef2f2;
}

.decimal-place-value-select:disabled,
.decimal-place-value-input:disabled,
.decimal-place-value-expanded-input:disabled,
.decimal-place-value-fraction-inputs
.form-control:disabled {
    cursor: not-allowed;
    background-color: #f3f5f8;
    color: #687386;
    opacity: 1;
}


/* =========================================================
   Fraction inputs
   ========================================================= */

.decimal-place-value-fraction-inputs {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    max-width: 540px;
}

.decimal-place-value-fraction-inputs .form-control {
    min-height: 3.2rem;
    border-color: #cfd8e3;
    border-radius: 0.75rem;
    font-size: 1.05rem;
    font-weight: 700;
    text-align: center;
}

.decimal-place-value-fraction-inputs .form-control:focus {
    border-color: #0f766e;
    box-shadow: 0 0 0 0.22rem rgba(15, 118, 110, 0.14);
}

.decimal-place-value-slash {
    flex: 0 0 auto;
    color: #101827;
    font-size: 1.8rem;
    font-weight: 800;
}


/* =========================================================
   Button rows
   ========================================================= */

.decimal-place-value-button-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.35rem;
}

.decimal-place-value-button-row .btn {
    min-height: 2.9rem;
    padding-right: 1.25rem;
    padding-left: 1.25rem;
    font-weight: 700;
}

/* =========================================================
   Tool buttons
   ========================================================= */

.decimal-place-value-tool-buttons {
    display: flex;
    justify-content: center;
    border-right: 1px solid #dce3eb;
    border-bottom: 1px solid #dce3eb;
    border-left: 1px solid #dce3eb;
    background: #ffffff;
    padding: 1.25rem 2rem 1.5rem;
}

.decimal-place-value-tool-buttons .btn {
    min-height: 2.8rem;
    font-weight: 700;
}


/* =========================================================
   Hint
   ========================================================= */

.decimal-place-value-hint {
    border-right: 1px solid #dce3eb;
    border-bottom: 1px solid #dce3eb;
    border-left: 1px solid #dce3eb;
    background: #ecfdf8;
    color: #33504d;
    padding: 1rem 1.25rem;
    line-height: 1.65;
}

.decimal-place-value-hint::before {
    margin-right: 0.4rem;
    color: #0f766e;
    content: "Hint:";
    font-weight: 800;
}

.decimal-place-value-hint[hidden] {
    display: none;
}


/* =========================================================
   Feedback
   ========================================================= */

.decimal-place-value-feedback {
    border-right: 1px solid #dce3eb;
    border-bottom: 1px solid #dce3eb;
    border-left: 1px solid #dce3eb;
    padding: 1rem 1.25rem;
    font-weight: 700;
    line-height: 1.6;
}

.decimal-place-value-feedback.success {
    background: #f0fdf4;
    color: #166534;
}

.decimal-place-value-feedback.error {
    background: #fef2f2;
    color: #991b1b;
}

.decimal-place-value-feedback.info {
    background: #f0f9ff;
    color: #075985;
}

.decimal-place-value-feedback[hidden] {
    display: none;
}


/* =========================================================
   Completion card
   ========================================================= */

.decimal-place-value-completion {
    border: 1px solid #86cda9;
    border-radius: 0 0 1.25rem 1.25rem;
    background: #f0fdf4;
    padding: 2rem;
    text-align: center;
}

.decimal-place-value-completion[hidden] {
    display: none;
}

.decimal-place-value-completion h3 {
    margin-bottom: 0.65rem;
    color: #14532d;
    font-size: 1.75rem;
    font-weight: 800;
}

.decimal-place-value-completion > p {
    color: #3f624b;
}

.decimal-place-value-final-answer {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin: 1.25rem 0;
    color: #101827;
    font-size: clamp(1.5rem, 4vw, 2.2rem);
    font-weight: 800;
}

.decimal-place-value-explanation {
    max-width: 720px;
    margin: 0 auto 1.5rem;
    color: #3f624b;
    line-height: 1.7;
}

#nextProblemButton {
    min-height: 2.9rem;
    font-weight: 700;
}


/* =========================================================
   Expanded-form display
   ========================================================= */

.decimal-place-value-expanded-display {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.decimal-place-value-expanded-term {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 2.5rem;
    border: 1px solid #dce3eb;
    border-radius: 0.7rem;
    background: #ffffff;
    padding: 0.5rem 0.75rem;
    color: #273449;
    font-weight: 800;
}

.decimal-place-value-expanded-plus {
    color: #0f766e;
    font-size: 1.3rem;
    font-weight: 800;
}


/* =========================================================
   Fraction display in completion
   ========================================================= */

.decimal-place-value-fraction-display {
    display: inline-grid;
    grid-template-rows: auto auto;
    min-width: 3.2rem;
    line-height: 1.05;
    text-align: center;
}

.decimal-place-value-fraction-numerator {
    border-bottom: 2px solid currentColor;
    padding: 0 0.45rem 0.25rem;
}

.decimal-place-value-fraction-denominator {
    padding: 0.25rem 0.45rem 0;
}


/* =========================================================
   Accessibility and focus
   ========================================================= */

.decimal-place-value-page button:focus-visible,
.decimal-place-value-page select:focus-visible,
.decimal-place-value-page input:focus-visible,
.decimal-place-value-page textarea:focus-visible {
    outline: 3px solid rgba(15, 118, 110, 0.24);
    outline-offset: 3px;
}

.decimal-place-value-page button:disabled {
    cursor: not-allowed;
    opacity: 0.68;
}


/* =========================================================
   Pop and shake animations
   ========================================================= */

.decimal-place-value-pop {
    animation: decimalPlaceValuePop 0.35s ease;
}

.decimal-place-value-shake {
    animation: decimalPlaceValueShake 0.35s ease;
}

.decimal-place-value-pulse {
    animation: decimalPlaceValuePulse 0.55s ease;
}

@keyframes decimalPlaceValuePop {
    from {
        opacity: 0;
        transform: translateY(8px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes decimalPlaceValueShake {
    0%,
    100% {
        transform: translateX(0);
    }

    25% {
        transform: translateX(-7px);
    }

    75% {
        transform: translateX(7px);
    }
}

@keyframes decimalPlaceValuePulse {
    0% {
        box-shadow: 0 0 0 0 rgba(21, 128, 61, 0.35);
    }

    70% {
        box-shadow: 0 0 0 16px rgba(21, 128, 61, 0);
    }

    100% {
        box-shadow: 0 0 0 0 rgba(21, 128, 61, 0);
    }
}

/* =========================================================
   Reminder cards
   ========================================================= */

.decimal-place-value-reminders-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1rem;
}

.decimal-place-value-reminder-card {
    border: 1px solid #dce3eb;
    border-radius: 1rem;
    background: #ffffff;
    padding: 1.5rem;
    box-shadow: 0 10px 24px rgba(16, 24, 39, 0.05);
}

.decimal-place-value-reminder-card h3 {
    margin-bottom: 0.75rem;
    color: #101827;
    font-size: 1.1rem;
    font-weight: 800;
}

.decimal-place-value-reminder-card p {
    margin-bottom: 1rem;
    color: #5b6678;
    line-height: 1.65;
}

.decimal-place-value-example {
    border-radius: 0.75rem;
    background: #101827;
    color: #ffffff;
    padding: 0.9rem;
    text-align: center;
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: 0.04em;
}


/* =========================================================
   Place value chart
   ========================================================= */

.decimal-place-value-chart-card {
    border: 1px solid #dce3eb;
    border-radius: 1.25rem;
    background: #ffffff;
    padding: 2rem;
    box-shadow: 0 12px 30px rgba(16, 24, 39, 0.05);
}

.decimal-place-value-chart {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.decimal-place-value-chart-column {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 120px;
    border: 1px solid #dce3eb;
    border-radius: 0.85rem;
    background: #f7f9fc;
    padding: 1rem;
    text-align: center;
}

.decimal-place-value-chart-label {
    margin-bottom: 0.6rem;
    color: #657184;
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.decimal-place-value-chart-value {
    color: #101827;
    font-size: 1.2rem;
    font-weight: 800;
}

.decimal-place-value-chart-decimal {
    background: #ecfdf8;
}

.decimal-place-value-chart-point {
    color: #0f766e;
    font-size: 2rem;
    font-weight: 800;
    line-height: 1;
}

.decimal-place-value-chart-example {
    border-top: 1px solid #dce3eb;
    padding-top: 1.5rem;
    text-align: center;
}

.decimal-place-value-chart-example-label {
    margin-bottom: 0.5rem;
    color: #657184;
    font-size: 0.8rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.decimal-place-value-chart-number {
    margin-bottom: 0.75rem;
    color: #0f766e;
    font-size: 2.25rem;
    font-weight: 800;
}


/* =========================================================
   Final CTA
   ========================================================= */

.decimal-place-value-final-cta-card {
    border-radius: 1.25rem;
    background: #101827;
    color: #ffffff;
    padding: 3rem 2rem;
    text-align: center;
}

.decimal-place-value-final-cta-card h2 {
    margin-bottom: 1rem;
    color: #ffffff;
    font-size: clamp(1.8rem, 3vw, 2.4rem);
    font-weight: 800;
}

.decimal-place-value-final-cta-card p {
    max-width: 720px;
    margin: 0 auto 2rem;
    color: rgba(255,255,255,0.82);
    line-height: 1.75;
}


/* =========================================================
   Responsive
   ========================================================= */

@media (max-width: 991.98px) {

    .decimal-place-value-overview-grid,
    .decimal-place-value-reminders-grid {
        grid-template-columns: repeat(2, minmax(0,1fr));
    }

    .decimal-place-value-chart {
        grid-template-columns: repeat(4, 1fr);
    }

    .decimal-place-value-tool-header {
        flex-direction: column;
        align-items: flex-start;
    }

    #newProblemButton {
        width: 100%;
    }
}

@media (max-width: 767.98px) {

    .decimal-place-value-overview,
    .decimal-place-value-tool-section,
    .decimal-place-value-reminders,
    .decimal-place-value-chart-section,
    .decimal-place-value-final-cta {
        padding: 3.5rem 0;
    }

    .decimal-place-value-overview-grid,
    .decimal-place-value-reminders-grid,
    .decimal-place-value-settings {
        grid-template-columns: 1fr;
    }

    .decimal-place-value-scoreboard {
        grid-template-columns: 1fr;
    }

    .decimal-place-value-progress-line {
        width: 50px;
    }

    .decimal-place-value-chart {
        grid-template-columns: repeat(2, 1fr);
    }

    .decimal-place-value-chart-column {
        min-height: 95px;
    }

    .decimal-place-value-fraction-inputs {
        flex-direction: column;
        align-items: stretch;
    }

    .decimal-place-value-slash {
        align-self: center;
    }

    .decimal-place-value-button-row {
        flex-direction: column;
    }

    .decimal-place-value-button-row .btn,
    .decimal-place-value-tool-buttons .btn,
    #nextProblemButton,
    #newProblemButton {
        width: 100%;
    }

    .decimal-place-value-display {
        font-size: clamp(2rem, 10vw, 3rem);
    }
}

@media (prefers-reduced-motion: reduce) {

    .decimal-place-value-progress-step,
    .decimal-place-value-pop,
    .decimal-place-value-shake,
    .decimal-place-value-pulse,
    .decimal-place-value-page * {
        animation: none !important;
        transition: none !important;
    }
}