/* =========================================================
   Fractions on a Number Line Practice
   File:
   /interactive-learning-tools/fractions-on-a-number-line/
   fractions-on-a-number-line.css
   ========================================================= */

.fraction-number-line-page {
    font-family: "Inter", sans-serif;
    background: #ffffff;
    color: #1f2937;
}

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


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

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

.fraction-number-line-overview,
.fraction-number-line-reminders {
    background: #f7f9fc;
}

.fraction-number-line-practice-section,
.fraction-number-line-final-cta {
    background: #ffffff;
}

.fraction-number-line-section-heading {
    max-width: 760px;
    margin: 0 auto 2.25rem;
    text-align: center;
}

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

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

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


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

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

.fraction-number-line-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);
}

.fraction-number-line-overview-card h3 {
    margin-bottom: 0.75rem;
    color: #101827;
    font-size: 1.1rem;
    font-weight: 800;
}

.fraction-number-line-overview-card p {
    margin-bottom: 0;
    color: #5b6678;
    line-height: 1.65;
}

.fraction-number-line-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
   ========================================================= */

.fraction-number-line-tool {
    max-width: 1120px;
    margin: 0 auto;
    overflow: hidden;
    border: 1px solid #dce3eb;
    border-radius: 1.25rem;
    background: #ffffff;
    box-shadow: 0 22px 55px rgba(16, 24, 39, 0.1);
}

.fraction-number-line-tool-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
    border-bottom: 1px solid #dce3eb;
    background: #101827;
    color: #ffffff;
    padding: 1.75rem 2rem;
}

.fraction-number-line-tool-header h2 {
    margin-bottom: 0;
    color: #ffffff;
    font-size: clamp(1.45rem, 3vw, 2rem);
    font-weight: 800;
}

.fraction-number-line-tool-header .fraction-number-line-eyebrow {
    color: #5eead4;
}


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

.fraction-number-line-scoreboard {
    display: grid;
    grid-template-columns: repeat(3, minmax(80px, 1fr));
    gap: 0.75rem;
}

.fraction-number-line-score-item {
    min-width: 90px;
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 0.8rem;
    background: rgba(255, 255, 255, 0.08);
    padding: 0.75rem 0.9rem;
    text-align: center;
}

.fraction-number-line-score-label {
    display: block;
    margin-bottom: 0.2rem;
    color: rgba(255, 255, 255, 0.72);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.fraction-number-line-score-item strong {
    color: #ffffff;
    font-size: 1.4rem;
    font-weight: 800;
}


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

.fraction-number-line-settings {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr)) auto;
    gap: 1rem;
    align-items: end;
    border-bottom: 1px solid #dce3eb;
    background: #f7f9fc;
    padding: 1.5rem 2rem;
}

.fraction-number-line-setting-group label {
    display: block;
    margin-bottom: 0.45rem;
    color: #273449;
    font-size: 0.9rem;
    font-weight: 700;
}

.fraction-number-line-setting-group .form-select {
    min-height: 3rem;
    border-color: #cfd8e3;
    border-radius: 0.75rem;
}

.fraction-number-line-setting-group .form-select:focus {
    border-color: #0f766e;
    box-shadow: 0 0 0 0.2rem rgba(15, 118, 110, 0.14);
}

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


/* =========================================================
   Problem display
   ========================================================= */

.fraction-number-line-problem-area {
    border-bottom: 1px solid #dce3eb;
    padding: 2.25rem 2rem;
    text-align: center;
}

.fraction-number-line-problem-label {
    margin-bottom: 0.8rem;
    color: #657184;
    font-size: 0.85rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.fraction-number-line-problem-fraction {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 5.5rem;
    color: #101827;
    font-size: clamp(1.8rem, 5vw, 3rem);
    font-weight: 800;
}


/* =========================================================
   Fraction displays
   ========================================================= */

.display-fraction {
    display: inline-grid;
    grid-template-rows: auto auto;
    min-width: 3.5rem;
    line-height: 1.05;
    text-align: center;
}

.display-fraction .fraction-numerator {
    border-bottom: 3px solid currentColor;
    padding: 0 0.6rem 0.35rem;
}

.display-fraction .fraction-denominator {
    padding: 0.35rem 0.6rem 0;
}

.fraction-number-line-inline-math {
    color: #0f766e;
    font-weight: 800;
}


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

.fraction-number-line-page .btn-teal {
    border-color: #0f766e;
    background: #0f766e;
    color: #ffffff;
}

.fraction-number-line-page .btn-teal:hover,
.fraction-number-line-page .btn-teal:focus {
    border-color: #0b5f59;
    background: #0b5f59;
    color: #ffffff;
}

.fraction-number-line-page .btn-outline-teal {
    border-color: #0f766e;
    color: #0f766e;
}

.fraction-number-line-page .btn-outline-teal:hover,
.fraction-number-line-page .btn-outline-teal:focus {
    border-color: #0f766e;
    background: #0f766e;
    color: #ffffff;
}


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

.fraction-number-line-progress {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    border-bottom: 1px solid #dce3eb;
    background: #ffffff;
    padding: 1.75rem 2rem;
}

.fraction-number-line-progress-step {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 100px;
    color: #8a95a6;
    text-align: center;
}

.fraction-number-line-progress-circle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    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;
}

.fraction-number-line-progress-step p {
    margin: 0.55rem 0 0;
    font-size: 0.8rem;
    font-weight: 700;
}

.fraction-number-line-progress-step.active {
    color: #0f766e;
}

.fraction-number-line-progress-step.active
.fraction-number-line-progress-circle {
    border-color: #0f766e;
    background: #0f766e;
    color: #ffffff;
}

.fraction-number-line-progress-step.complete {
    color: #0f766e;
}

.fraction-number-line-progress-step.complete
.fraction-number-line-progress-circle {
    border-color: #0f766e;
    background: #dff7f3;
    color: #0f766e;
}

.fraction-number-line-progress-line {
    width: 85px;
    height: 2px;
    margin-top: 1.2rem;
    background: #d8e0e9;
}

.fraction-number-line-progress-line.complete {
    background: #0f766e;
}


/* =========================================================
   Workspace and step cards
   ========================================================= */

.fraction-number-line-workspace {
    padding: 2rem;
}

.fraction-number-line-work-step {
    max-width: 900px;
    margin: 0 auto;
    border: 1px solid #dce3eb;
    border-radius: 1rem;
    background: #ffffff;
    padding: 2rem;
    box-shadow: 0 12px 30px rgba(16, 24, 39, 0.06);
}

.fraction-number-line-work-step + .fraction-number-line-work-step {
    margin-top: 1.25rem;
}

.fraction-number-line-work-step.active {
    border-color: #7dd3c7;
    box-shadow:
        0 0 0 3px rgba(15, 118, 110, 0.08),
        0 14px 32px rgba(16, 24, 39, 0.08);
}

.fraction-number-line-work-step.complete {
    border-color: #86cda9;
    background: #f7fdf9;
}

.fraction-number-line-work-step[hidden] {
    display: none;
}

.fraction-number-line-work-label {
    margin-bottom: 0.5rem;
    color: #0f766e;
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.fraction-number-line-work-step h3 {
    margin-bottom: 0.75rem;
    color: #101827;
    font-size: clamp(1.35rem, 3vw, 1.8rem);
    font-weight: 800;
}

.fraction-number-line-step-instruction {
    max-width: 760px;
    margin-bottom: 1.5rem;
    color: #5b6678;
    line-height: 1.7;
}


/* =========================================================
   Equation cards
   ========================================================= */

.fraction-number-line-equation-card {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    max-width: 650px;
    margin-bottom: 1.5rem;
    border: 1px solid #dce3eb;
    border-radius: 0.9rem;
    background: #f7f9fc;
    padding: 1.4rem;
    color: #101827;
    font-size: 1.4rem;
    font-weight: 800;
}

.fraction-number-line-equation-symbol {
    color: #0f766e;
    font-size: 2rem;
    font-weight: 800;
}

.fraction-number-line-input-group {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    align-items: center;
}

.fraction-number-line-input-group label {
    color: #273449;
    font-size: 0.9rem;
    font-weight: 800;
    text-align: center;
}


/* =========================================================
   Number inputs
   ========================================================= */

.fraction-number-line-number-input {
    width: 105px;
    height: 58px;
    border: 2px solid #cfd8e3;
    border-radius: 0.75rem;
    background: #ffffff;
    color: #101827;
    font-size: 1.25rem;
    font-weight: 800;
    text-align: center;
}

.fraction-number-line-number-input:focus {
    border-color: #0f766e;
    outline: none;
    box-shadow: 0 0 0 0.22rem rgba(15, 118, 110, 0.14);
}

.fraction-number-line-number-input.is-correct {
    border-color: #15803d;
    background: #f0fdf4;
}

.fraction-number-line-number-input.is-incorrect {
    border-color: #dc2626;
    background: #fef2f2;
}

.fraction-number-line-number-input:disabled {
    cursor: not-allowed;
    background: #f3f5f8;
    color: #687386;
    opacity: 1;
}


/* =========================================================
   Interactive number line card
   ========================================================= */

.fraction-number-line-visual-card {
    margin-bottom: 1.5rem;
    border: 1px solid #dce3eb;
    border-radius: 1rem;
    background: #f7f9fc;
    padding: 1.5rem;
}

.fraction-number-line-visual-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.fraction-number-line-visual-label {
    margin-bottom: 0.3rem;
    color: #0f766e;
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.fraction-number-line-visual-instruction {
    margin-bottom: 0;
    color: #273449;
    font-weight: 700;
}


/* =========================================================
   Number line viewport and canvas
   ========================================================= */

.fraction-number-line-viewport {
    width: 100%;
    overflow-x: auto;
    overflow-y: hidden;
    border: 1px solid #dce3eb;
    border-radius: 0.9rem;
    background: #ffffff;
    padding: 1.25rem 1rem 1.75rem;
    scrollbar-width: thin;
}

.fraction-number-line-canvas {
    position: relative;
    min-width: 720px;
    height: 190px;
    margin: 0 auto;
    user-select: none;
}

.fraction-number-line-axis {
    position: absolute;
    top: 92px;
    right: 42px;
    left: 42px;
    height: 4px;
    border-radius: 999px;
    background: #273449;
}

.fraction-number-line-axis::before,
.fraction-number-line-axis::after {
    position: absolute;
    top: 50%;
    width: 0;
    height: 0;
    content: "";
    transform: translateY(-50%);
}

.fraction-number-line-axis::before {
    left: -2px;
    border-top: 7px solid transparent;
    border-right: 11px solid #273449;
    border-bottom: 7px solid transparent;
}

.fraction-number-line-axis::after {
    right: -2px;
    border-top: 7px solid transparent;
    border-bottom: 7px solid transparent;
    border-left: 11px solid #273449;
}


/* =========================================================
   Number line ticks
   ========================================================= */

.fraction-number-line-ticks {
    position: absolute;
    inset: 0;
}

.fraction-number-line-tick {
    position: absolute;
    top: 64px;
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 44px;
    padding: 0;
    border: 0;
    background: transparent;
    color: #273449;
    cursor: pointer;
    transform: translateX(-50%);
}

.fraction-number-line-tick-mark {
    display: block;
    width: 3px;
    height: 60px;
    border-radius: 999px;
    background: #94a3b8;
    transition:
        height 0.2s ease,
        background 0.2s ease,
        transform 0.2s ease;
}

.fraction-number-line-tick-label {
    display: block;
    min-width: 56px;
    margin-top: 0.6rem;
    color: #657184;
    font-size: 0.78rem;
    font-weight: 700;
    line-height: 1.2;
    text-align: center;
}

.fraction-number-line-tick:hover
.fraction-number-line-tick-mark,
.fraction-number-line-tick:focus
.fraction-number-line-tick-mark {
    height: 70px;
    background: #0f766e;
    transform: translateY(-5px);
}

.fraction-number-line-tick:focus {
    outline: none;
}

.fraction-number-line-tick:focus-visible {
    border-radius: 0.4rem;
    outline: 3px solid rgba(15, 118, 110, 0.22);
    outline-offset: 4px;
}

.fraction-number-line-tick.is-whole
.fraction-number-line-tick-mark {
    width: 4px;
    height: 76px;
    background: #101827;
}

.fraction-number-line-tick.is-whole
.fraction-number-line-tick-label {
    color: #101827;
    font-size: 0.9rem;
    font-weight: 800;
}

.fraction-number-line-tick.is-hidden-partition {
    pointer-events: none;
    opacity: 0;
}

.fraction-number-line-tick.is-visible-partition {
    animation: fractionNumberLinePartitionReveal 0.35s ease both;
}

.fraction-number-line-tick.is-selected
.fraction-number-line-tick-mark {
    height: 72px;
    background: #0f766e;
    transform: translateY(-6px);
}

.fraction-number-line-tick.is-correct
.fraction-number-line-tick-mark {
    height: 76px;
    background: #15803d;
    transform: translateY(-8px);
}

.fraction-number-line-tick.is-incorrect
.fraction-number-line-tick-mark {
    background: #dc2626;
}


/* =========================================================
   Selected and correct points
   ========================================================= */

.fraction-number-line-selected-point,
.fraction-number-line-correct-point {
    position: absolute;
    top: 94px;
    z-index: 5;
    width: 28px;
    height: 28px;
    border: 4px solid #ffffff;
    border-radius: 50%;
    box-shadow: 0 4px 12px rgba(16, 24, 39, 0.25);
    transform: translate(-50%, -50%);
}

.fraction-number-line-selected-point {
    background: #0f766e;
}

.fraction-number-line-correct-point {
    background: #15803d;
}

.fraction-number-line-selected-point[hidden],
.fraction-number-line-correct-point[hidden] {
    display: none;
}


/* =========================================================
   Number line legend
   ========================================================= */

.fraction-number-line-legend {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.25rem;
    margin-top: 1rem;
}

.fraction-number-line-legend-item {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    color: #657184;
    font-size: 0.8rem;
    font-weight: 700;
}

.fraction-number-line-legend-dot {
    display: inline-block;
    width: 0.75rem;
    height: 0.75rem;
    border-radius: 50%;
}

.fraction-number-line-legend-dot-whole {
    background: #101827;
}

.fraction-number-line-legend-dot-part {
    background: #94a3b8;
}


/* =========================================================
   Concept question options
   ========================================================= */

.fraction-number-line-option-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.85rem;
    margin-bottom: 1.5rem;
}

.fraction-number-line-radio-option {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    min-height: 4rem;
    border: 1px solid #dce3eb;
    border-radius: 0.8rem;
    background: #f7f9fc;
    padding: 0.9rem 1rem;
    color: #273449;
    cursor: pointer;
    font-weight: 700;
    transition:
        border-color 0.2s ease,
        background 0.2s ease,
        transform 0.2s ease;
}

.fraction-number-line-radio-option:hover {
    border-color: #7dd3c7;
    background: #f0fdfa;
    transform: translateY(-1px);
}

.fraction-number-line-radio-option input {
    flex: 0 0 auto;
    width: 1.1rem;
    height: 1.1rem;
    margin: 0;
    accent-color: #0f766e;
}

.fraction-number-line-radio-option.is-correct {
    border-color: #15803d;
    background: #f0fdf4;
    color: #166534;
}

.fraction-number-line-radio-option.is-incorrect {
    border-color: #dc2626;
    background: #fef2f2;
    color: #991b1b;
}

.fraction-number-line-radio-option[hidden] {
    display: none;
}


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

.fraction-number-line-feedback {
    max-width: 900px;
    margin: 1.25rem auto 0;
    border: 1px solid #cfd8e3;
    border-radius: 0.85rem;
    padding: 1rem 1.15rem;
    color: #273449;
    font-weight: 700;
    line-height: 1.6;
}

.fraction-number-line-feedback.success {
    border-color: #86cda9;
    background: #f0fdf4;
    color: #166534;
}

.fraction-number-line-feedback.error {
    border-color: #f0a7a7;
    background: #fef2f2;
    color: #991b1b;
}

.fraction-number-line-feedback.info {
    border-color: #9cc8df;
    background: #f0f9ff;
    color: #075985;
}

.fraction-number-line-feedback[hidden] {
    display: none;
}


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

.fraction-number-line-hint-button {
    display: block;
    margin: 1.25rem auto 0;
    border: 0;
    background: transparent;
    color: #0f766e;
    font-weight: 800;
    text-decoration: underline;
    text-underline-offset: 0.2rem;
}

.fraction-number-line-hint-button:hover,
.fraction-number-line-hint-button:focus {
    color: #0b5f59;
}

.fraction-number-line-hint {
    max-width: 900px;
    margin: 1rem auto 0;
    border-left: 4px solid #0f766e;
    border-radius: 0.25rem 0.75rem 0.75rem 0.25rem;
    background: #ecfdf8;
    padding: 1rem 1.15rem;
    color: #33504d;
    line-height: 1.65;
}

.fraction-number-line-hint[hidden] {
    display: none;
}


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

.fraction-number-line-completion {
    max-width: 900px;
    margin: 1.5rem auto 0;
    border: 1px solid #86cda9;
    border-radius: 1rem;
    background: #f0fdf4;
    padding: 2rem;
    text-align: center;
}

.fraction-number-line-completion[hidden] {
    display: none;
}

.fraction-number-line-completion-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 3.5rem;
    height: 3.5rem;
    margin-bottom: 1rem;
    border-radius: 50%;
    background: #15803d;
    color: #ffffff;
    font-size: 1.6rem;
    font-weight: 800;
}

.fraction-number-line-completion h3 {
    margin-bottom: 0.65rem;
    color: #14532d;
    font-size: 1.65rem;
    font-weight: 800;
}

.fraction-number-line-completion p {
    color: #3f624b;
}

.fraction-number-line-final-answer {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin: 1.25rem 0;
    color: #101827;
    font-size: 1.75rem;
    font-weight: 800;
}

.fraction-number-line-completion-explanation {
    max-width: 680px;
    margin: 0 auto 1.5rem;
    line-height: 1.65;
}


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

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

.fraction-number-line-reminder-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);
}

.fraction-number-line-reminder-card h3 {
    margin-bottom: 0.75rem;
    color: #101827;
    font-size: 1.15rem;
    font-weight: 800;
}

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

.fraction-number-line-example {
    border-radius: 0.75rem;
    background: #ecfdf8;
    padding: 0.9rem 1rem;
    color: #0f766e;
    font-size: 1rem;
    font-weight: 800;
    line-height: 1.55;
    text-align: center;
}


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

.fraction-number-line-final-cta-card {
    max-width: 900px;
    margin: 0 auto;
    border-radius: 1.25rem;
    background: #101827;
    padding: 3rem;
    color: #ffffff;
    text-align: center;
    box-shadow: 0 22px 55px rgba(16, 24, 39, 0.16);
}

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

.fraction-number-line-final-cta-card h2 {
    margin-bottom: 1rem;
    color: #ffffff;
    font-size: clamp(1.75rem, 3vw, 2.4rem);
    font-weight: 800;
}

.fraction-number-line-final-cta-card p {
    max-width: 680px;
    margin: 0 auto 1.5rem;
    color: rgba(255, 255, 255, 0.76);
    font-size: 1.05rem;
    line-height: 1.75;
}


/* =========================================================
   Animations
   ========================================================= */

.fraction-number-line-pop {
    animation: fractionNumberLinePop 0.35s ease;
}

.fraction-number-line-shake {
    animation: fractionNumberLineShake 0.35s ease;
}

.fraction-number-line-pulse {
    animation: fractionNumberLinePulse 0.55s ease;
}

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

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

@keyframes fractionNumberLinePartitionReveal {
    from {
        opacity: 0;
        transform: translateX(-50%) scaleY(0.35);
        transform-origin: center;
    }

    to {
        opacity: 1;
        transform: translateX(-50%) scaleY(1);
        transform-origin: center;
    }
}

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

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

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

@keyframes fractionNumberLinePulse {
    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);
    }
}


/* =========================================================
   Large tablet
   ========================================================= */

@media (max-width: 1199.98px) {
    .fraction-number-line-settings {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    #newProblemButton {
        grid-column: 1 / -1;
    }

    .fraction-number-line-progress-step {
        min-width: 88px;
    }

    .fraction-number-line-progress-line {
        width: 60px;
    }
}


/* =========================================================
   Tablet
   ========================================================= */

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

    .fraction-number-line-tool-header {
        align-items: flex-start;
        flex-direction: column;
    }

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

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

    .fraction-number-line-progress-step {
        min-width: 78px;
    }

    .fraction-number-line-progress-line {
        width: 42px;
    }
}


/* =========================================================
   Mobile
   ========================================================= */

@media (max-width: 767.98px) {
    .fraction-number-line-overview,
    .fraction-number-line-practice-section,
    .fraction-number-line-reminders,
    .fraction-number-line-final-cta {
        padding: 3.75rem 0;
    }

    .fraction-number-line-overview-grid,
    .fraction-number-line-reminders-grid {
        grid-template-columns: 1fr;
    }

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

    .fraction-number-line-tool-header,
    .fraction-number-line-settings,
    .fraction-number-line-problem-area,
    .fraction-number-line-progress,
    .fraction-number-line-workspace {
        padding-left: 1.25rem;
        padding-right: 1.25rem;
    }

    .fraction-number-line-settings {
        grid-template-columns: 1fr;
    }

    #newProblemButton {
        grid-column: auto;
        width: 100%;
    }

    .fraction-number-line-progress {
        overflow-x: auto;
        justify-content: flex-start;
    }

    .fraction-number-line-progress-step {
        min-width: 74px;
    }

    .fraction-number-line-progress-line {
        flex: 0 0 38px;
        width: 38px;
    }

    .fraction-number-line-work-step {
        padding: 1.4rem;
    }

    .fraction-number-line-equation-card {
        flex-direction: column;
    }

    .fraction-number-line-equation-symbol {
        transform: rotate(90deg);
    }

    .fraction-number-line-visual-header {
        flex-direction: column;
    }

    #revealPartitionsButton {
        width: 100%;
    }

    .fraction-number-line-option-grid {
        grid-template-columns: 1fr;
    }

    .fraction-number-line-final-cta-card {
        padding: 2rem 1.35rem;
    }
}


/* =========================================================
   Small mobile
   ========================================================= */

@media (max-width: 479.98px) {
    .fraction-number-line-scoreboard {
        gap: 0.4rem;
    }

    .fraction-number-line-score-item {
        min-width: 0;
        padding: 0.65rem 0.4rem;
    }

    .fraction-number-line-score-label {
        font-size: 0.65rem;
    }

    .fraction-number-line-score-item strong {
        font-size: 1.2rem;
    }

    .fraction-number-line-progress {
        padding-left: 0.65rem;
        padding-right: 0.65rem;
    }

    .fraction-number-line-progress-step {
        min-width: 62px;
    }

    .fraction-number-line-progress-circle {
        width: 2.25rem;
        height: 2.25rem;
    }

    .fraction-number-line-progress-line {
        flex-basis: 24px;
        width: 24px;
        margin-top: 1.08rem;
    }

    .fraction-number-line-progress-step p {
        font-size: 0.66rem;
    }

    .fraction-number-line-visual-card {
        padding: 1rem;
    }

    .fraction-number-line-viewport {
        padding-right: 0.5rem;
        padding-left: 0.5rem;
    }

    .fraction-number-line-canvas {
        min-width: 660px;
    }

    .fraction-number-line-final-answer {
        gap: 0.7rem;
        font-size: 1.35rem;
    }
}


/* =========================================================
   Reduced motion
   ========================================================= */

@media (prefers-reduced-motion: reduce) {
    .fraction-number-line-pop,
    .fraction-number-line-shake,
    .fraction-number-line-pulse,
    .fraction-number-line-tick.is-visible-partition {
        animation: none;
    }

    .fraction-number-line-progress-circle,
    .fraction-number-line-radio-option,
    .fraction-number-line-tick-mark {
        transition: none;
    }
}