/* ==========================================================
   BELAJAREDUTECH
   PERSAMAAN KUADRAT
   MATEMATIKA SMP KELAS 9
========================================================== */

.quadratic-equation-grade-nine-page {
    --quadratic9-primary: #7c3aed;
    --quadratic9-primary-dark: #5b21b6;
    --quadratic9-primary-soft: #f5f3ff;

    --quadratic9-secondary: #db2777;
    --quadratic9-secondary-soft: #fdf2f8;

    --quadratic9-green: #0f766e;
    --quadratic9-green-soft: #f0fdfa;

    --quadratic9-red: #b91c1c;
    --quadratic9-red-soft: #fef2f2;

    --quadratic9-text: #0f172a;
    --quadratic9-muted: #64748b;
    --quadratic9-border: #e2e8f0;
    --quadratic9-soft: #f8fafc;
}


.quadratic-equation-grade-nine-page .section {
    padding: 82px 0;
}


.quadratic-nine-footer-disabled {
    display: block;
    margin-bottom: 8px;

    color: rgba(255, 255, 255, 0.42);

    cursor: default;
}


/* ==========================================================
   BREADCRUMB
========================================================== */

.quadratic-nine-breadcrumb-section {
    background: #ffffff;

    border-bottom:
        1px solid
        var(--quadratic9-border);
}


.quadratic-nine-breadcrumb {
    min-height: 54px;

    display: flex;
    align-items: center;
    flex-wrap: wrap;

    gap: 8px;

    color: var(--quadratic9-muted);

    font-size: 0.76rem;
}


.quadratic-nine-breadcrumb a {
    color: var(--quadratic9-muted);

    text-decoration: none;
}


.quadratic-nine-breadcrumb a:hover {
    color: var(--quadratic9-primary);
}


.quadratic-nine-breadcrumb strong {
    color: #334155;
}


/* ==========================================================
   HERO
========================================================== */

.quadratic-nine-hero {
    position: relative;

    overflow: hidden;

    padding: 76px 0 88px;

    background:
        radial-gradient(
            circle at 88% 14%,
            rgba(124, 58, 237, 0.15),
            transparent 30%
        ),
        radial-gradient(
            circle at 10% 88%,
            rgba(219, 39, 119, 0.09),
            transparent 31%
        ),
        linear-gradient(
            180deg,
            #faf8ff,
            #ffffff
        );
}


.quadratic-nine-hero-container {
    display: grid;

    grid-template-columns:
        minmax(0, 1.03fr)
        minmax(430px, 0.97fr);

    align-items: center;

    gap: 52px;
}


.quadratic-nine-hero-content,
.quadratic-nine-hero-visual {
    min-width: 0;
}


.quadratic-nine-topic-badge {
    width: fit-content;

    display: flex;
    align-items: center;

    gap: 10px;

    margin-bottom: 14px;

    color: var(--quadratic9-primary-dark);

    font-size: 0.67rem;
    font-weight: 850;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}


.quadratic-nine-topic-badge span {
    width: 36px;
    height: 36px;

    display: grid;
    place-items: center;

    color: #ffffff;
    background: var(--quadratic9-primary);

    border-radius: 11px;

    font-size: 0.6rem;
}


.quadratic-nine-hero-content h1 {
    margin: 0 0 22px;

    font-size: clamp(
        2.9rem,
        4.7vw,
        4.7rem
    );

    line-height: 1.01;
    letter-spacing: -0.052em;
}


.quadratic-nine-hero-content > p {
    max-width: 660px;

    margin: 0;

    color: var(--quadratic9-muted);

    line-height: 1.8;
}


.quadratic-nine-hero-actions {
    display: flex;
    flex-wrap: wrap;

    gap: 12px;

    margin-top: 30px;
}


.quadratic-nine-hero-meta {
    max-width: 610px;

    display: grid;

    grid-template-columns:
        repeat(3, minmax(0, 1fr));

    gap: 10px;

    margin-top: 34px;
}


.quadratic-nine-hero-meta > div {
    padding: 16px;

    background: rgba(255, 255, 255, 0.86);

    border: 1px solid var(--quadratic9-border);
    border-radius: 14px;
}


.quadratic-nine-hero-meta strong,
.quadratic-nine-hero-meta span {
    display: block;
}


.quadratic-nine-hero-meta strong {
    margin-bottom: 4px;

    color: var(--quadratic9-primary);

    font-size: 1.08rem;
}


.quadratic-nine-hero-meta span {
    color: var(--quadratic9-muted);

    font-size: 0.68rem;
}


/* ==========================================================
   HERO BOARD
========================================================== */

.quadratic-nine-hero-visual {
    width: 100%;
    max-width: 620px;

    margin-left: auto;
}


.quadratic-nine-board {
    padding: 30px;

    color: #ffffff;

    background:
        linear-gradient(
            145deg,
            #3b0764,
            #6d28d9 47%,
            #be185d
        );

    border-radius: 30px;

    box-shadow:
        0 32px 85px
        rgba(91, 33, 182, 0.24);
}


.quadratic-nine-board-label {
    display: block;

    margin-bottom: 18px;

    color: rgba(255, 255, 255, 0.62);

    font-size: 0.6rem;
    font-weight: 850;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}


.quadratic-nine-board-equation {
    margin-bottom: 10px;
    padding: 18px;

    background: rgba(255, 255, 255, 0.08);

    border-radius: 15px;

    text-align: center;
}


.quadratic-nine-board-equation span,
.quadratic-nine-board-equation strong {
    display: block;
}


.quadratic-nine-board-equation span {
    margin-bottom: 6px;

    color: rgba(255, 255, 255, 0.62);

    font-size: 0.52rem;
}


.quadratic-nine-board-equation strong {
    color: #f9a8d4;

    font-size: 1.35rem;
}


.quadratic-nine-board-flow {
    display: grid;

    grid-template-columns:
        1fr auto 1fr auto 1fr;

    align-items: center;

    gap: 7px;

    margin-bottom: 10px;
}


.quadratic-nine-board-flow > div {
    min-height: 115px;

    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;

    padding: 13px;

    background: rgba(255, 255, 255, 0.07);

    border-radius: 13px;

    text-align: center;
}


.quadratic-nine-board-flow small,
.quadratic-nine-board-flow strong {
    display: block;
}


.quadratic-nine-board-flow small {
    margin-bottom: 6px;

    color: rgba(255, 255, 255, 0.6);
}


.quadratic-nine-board-flow > i {
    color: #f9a8d4;

    font-style: normal;
    font-weight: 900;
}


.quadratic-nine-board-flow .result {
    background: var(--quadratic9-green);
}


.quadratic-nine-board-footer {
    display: grid;

    grid-template-columns:
        repeat(4, minmax(0, 1fr));

    gap: 7px;
}


.quadratic-nine-board-footer > div {
    padding: 12px 8px;

    color: #334155;
    background: #ffffff;

    border-radius: 12px;

    text-align: center;
}


.quadratic-nine-board-footer span,
.quadratic-nine-board-footer strong {
    display: block;
}


.quadratic-nine-board-footer span {
    margin-bottom: 4px;

    color: var(--quadratic9-muted);

    font-size: 0.49rem;
}


.quadratic-nine-board-footer strong {
    color: var(--quadratic9-primary-dark);
}


/* ==========================================================
   PROGRESS
========================================================== */

.quadratic-nine-progress-section {
    padding: 14px 0;

    background: #ffffff;

    border-top: 1px solid var(--quadratic9-border);
    border-bottom: 1px solid var(--quadratic9-border);
}


.quadratic-nine-progress-list {
    display: flex;
    align-items: center;

    gap: 8px;

    overflow-x: auto;

    padding-bottom: 3px;
}


.quadratic-nine-progress-list a {
    flex-shrink: 0;

    display: flex;
    align-items: center;

    gap: 7px;

    padding: 8px 11px;

    color: var(--quadratic9-muted);
    background: var(--quadratic9-soft);

    border: 1px solid var(--quadratic9-border);
    border-radius: 999px;

    text-decoration: none;

    font-size: 0.68rem;
    font-weight: 750;
}


.quadratic-nine-progress-list a:hover {
    color: var(--quadratic9-primary-dark);
    background: var(--quadratic9-primary-soft);
    border-color: #c4b5fd;
}


.quadratic-nine-progress-list span {
    color: var(--quadratic9-primary);

    font-size: 0.58rem;
    font-weight: 900;
}


/* ==========================================================
   COMMON
========================================================== */

.quadratic-nine-two-column {
    display: grid;

    grid-template-columns:
        minmax(0, 0.78fr)
        minmax(500px, 1.22fr);

    align-items: center;

    gap: 70px;
}


.quadratic-nine-section-content h2 {
    margin: 12px 0 18px;

    font-size: clamp(
        2.25rem,
        4.3vw,
        3.8rem
    );

    line-height: 1.05;
    letter-spacing: -0.045em;
}


.quadratic-nine-section-content p {
    color: var(--quadratic9-muted);

    line-height: 1.8;
}


.quadratic-nine-inline-rule {
    margin-top: 20px;
    padding: 16px;

    color: var(--quadratic9-primary-dark);
    background: var(--quadratic9-primary-soft);

    border: 1px solid #ddd6fe;
    border-radius: 14px;

    font-weight: 900;

    text-align: center;
}


/* ==========================================================
   OBJECTIVES
========================================================== */

.quadratic-nine-objective-section {
    background: #ffffff;
}


.quadratic-nine-objective-list {
    display: grid;

    grid-template-columns:
        repeat(2, minmax(0, 1fr));

    gap: 10px;
}


.quadratic-nine-objective-list article {
    min-height: 145px;

    padding: 18px;

    background: var(--quadratic9-soft);

    border: 1px solid var(--quadratic9-border);
    border-radius: 17px;
}


.quadratic-nine-objective-list article > span,
.quadratic-nine-strategy-grid article > span {
    width: 38px;
    height: 38px;

    display: grid;
    place-items: center;

    margin-bottom: 12px;

    color: #ffffff;
    background: var(--quadratic9-primary);

    border-radius: 50%;

    font-size: 0.55rem;
    font-weight: 900;
}


.quadratic-nine-objective-list p {
    margin: 0;

    color: var(--quadratic9-muted);

    line-height: 1.65;
}


/* ==========================================================
   GENERAL FORM
========================================================== */

.quadratic-nine-general-section {
    background: var(--quadratic9-soft);
}


.quadratic-nine-anatomy-card {
    display: grid;

    grid-template-columns:
        repeat(3, minmax(0, 1fr));

    gap: 10px;

    padding: 24px;

    color: #ffffff;

    background:
        linear-gradient(
            145deg,
            #3b0764,
            #0f172a
        );

    border-radius: 24px;
}


.quadratic-nine-anatomy-card > div {
    min-height: 190px;

    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;

    padding: 16px;

    background: rgba(255, 255, 255, 0.07);

    border-radius: 14px;

    text-align: center;
}


.quadratic-nine-anatomy-card span {
    width: 44px;
    height: 44px;

    display: grid;
    place-items: center;

    margin-bottom: 12px;

    color: #ffffff;
    background: var(--quadratic9-primary);

    border-radius: 50%;

    font-weight: 900;
}


.quadratic-nine-anatomy-card strong,
.quadratic-nine-anatomy-card small {
    display: block;
}


.quadratic-nine-anatomy-card small {
    margin-top: 7px;

    color: rgba(255, 255, 255, 0.6);
}


/* ==========================================================
   EXAMPLES
========================================================== */

.quadratic-nine-example-section {
    background: #ffffff;
}


.quadratic-nine-example-grid,
.quadratic-nine-discriminant-grid,
.quadratic-nine-mistake-grid,
.quadratic-nine-practice-grid {
    display: grid;

    grid-template-columns:
        repeat(3, minmax(0, 1fr));

    gap: 16px;
}


.quadratic-nine-example-grid article,
.quadratic-nine-mistake-grid article,
.quadratic-nine-practice-grid article {
    min-height: 250px;

    padding: 23px;

    background: var(--quadratic9-red-soft);

    border: 1px solid #fecaca;
    border-radius: 21px;
}


.quadratic-nine-example-grid article.correct {
    background: var(--quadratic9-green-soft);

    border-color: #99f6e4;
}


.quadratic-nine-example-grid article > span,
.quadratic-nine-mistake-grid article > span,
.quadratic-nine-practice-grid article > span {
    display: block;

    margin-bottom: 13px;

    color: var(--quadratic9-primary);

    font-size: 0.58rem;
    font-weight: 850;
    text-transform: uppercase;
}


.quadratic-nine-example-grid strong {
    display: block;

    margin-bottom: 12px;

    color: var(--quadratic9-text);
}


.quadratic-nine-example-grid p,
.quadratic-nine-mistake-grid p {
    margin: 0;

    color: var(--quadratic9-muted);

    line-height: 1.65;
}


/* ==========================================================
   ROOT CHECK
========================================================== */

.quadratic-nine-root-section {
    background: var(--quadratic9-soft);
}


.quadratic-nine-root-check-card {
    padding: 26px;

    color: #ffffff;

    background:
        linear-gradient(
            145deg,
            #3b0764,
            #0f172a
        );

    border-radius: 24px;

    text-align: center;
}


.quadratic-nine-root-check-card > span {
    display: block;

    margin-bottom: 8px;

    color: rgba(255, 255, 255, 0.62);
}


.quadratic-nine-root-check-card > strong {
    display: block;

    margin-bottom: 18px;

    color: #f9a8d4;

    font-size: 1.35rem;
}


.quadratic-nine-root-check-card > div {
    display: grid;

    grid-template-columns:
        1fr auto 1fr auto 1fr;

    align-items: center;

    gap: 8px;
}


.quadratic-nine-root-check-card p,
.quadratic-nine-root-check-card > div > strong {
    margin: 0;
    padding: 14px;

    background: rgba(255, 255, 255, 0.07);

    border-radius: 12px;
}


.quadratic-nine-root-check-card i {
    color: #f9a8d4;

    font-style: normal;
}


/* ==========================================================
   FACTORIZATION
========================================================== */

.quadratic-nine-factor-section {
    background: #ffffff;
}


.quadratic-nine-factor-flow,
.quadratic-nine-formula-flow {
    display: grid;

    grid-template-columns:
        1fr auto
        1fr auto
        1fr auto
        1fr;

    align-items: center;

    gap: 9px;
}


.quadratic-nine-factor-flow > div,
.quadratic-nine-formula-flow > div {
    min-height: 155px;

    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;

    padding: 17px;

    background: var(--quadratic9-soft);

    border: 1px solid var(--quadratic9-border);
    border-radius: 17px;

    text-align: center;
}


.quadratic-nine-factor-flow span,
.quadratic-nine-factor-flow strong,
.quadratic-nine-formula-flow span,
.quadratic-nine-formula-flow strong {
    display: block;
}


.quadratic-nine-factor-flow span,
.quadratic-nine-formula-flow span {
    margin-bottom: 6px;

    color: var(--quadratic9-muted);

    font-size: 0.53rem;
}


.quadratic-nine-factor-flow strong,
.quadratic-nine-formula-flow strong {
    color: var(--quadratic9-primary-dark);

    margin: 2px 0;
}


.quadratic-nine-factor-flow > i,
.quadratic-nine-formula-flow > i {
    color: var(--quadratic9-secondary);

    font-style: normal;
    font-weight: 900;
}


.quadratic-nine-factor-flow .result,
.quadratic-nine-formula-flow .result {
    color: #ffffff;
    background: var(--quadratic9-green);
    border-color: var(--quadratic9-green);
}


.quadratic-nine-factor-flow .result span,
.quadratic-nine-factor-flow .result strong,
.quadratic-nine-formula-flow .result span,
.quadratic-nine-formula-flow .result strong {
    color: #ffffff;
}


/* ==========================================================
   ZERO PRODUCT
========================================================== */

.quadratic-nine-zero-product-section {
    background: var(--quadratic9-soft);
}


.quadratic-nine-zero-product-card {
    padding: 25px;

    background:
        linear-gradient(
            145deg,
            #3b0764,
            #0f172a
        );

    border-radius: 24px;
}


.quadratic-nine-zero-start {
    margin-bottom: 10px;
    padding: 18px;

    color: #ffffff;
    background: rgba(255, 255, 255, 0.08);

    border-radius: 14px;

    text-align: center;
}


.quadratic-nine-zero-start strong {
    color: #f9a8d4;
}


.quadratic-nine-zero-branches {
    display: grid;

    grid-template-columns:
        repeat(2, minmax(0, 1fr));

    gap: 10px;
}


.quadratic-nine-zero-branches > div {
    padding: 18px;

    color: #334155;
    background: #ffffff;

    border-radius: 14px;

    text-align: center;
}


.quadratic-nine-zero-branches span,
.quadratic-nine-zero-branches strong,
.quadratic-nine-zero-branches small {
    display: block;
}


.quadratic-nine-zero-branches span {
    margin-bottom: 6px;

    color: var(--quadratic9-muted);
}


.quadratic-nine-zero-branches small {
    margin-top: 7px;

    color: var(--quadratic9-green);

    font-weight: 850;
}


/* ==========================================================
   DISCRIMINANT
========================================================== */

.quadratic-nine-discriminant-section {
    background: #ffffff;
}


.quadratic-nine-discriminant-formula {
    max-width: 520px;

    margin: 0 auto 28px;
    padding: 20px;

    color: #ffffff;
    background: var(--quadratic9-primary);

    border-radius: 18px;

    font-size: 1.5rem;
    font-weight: 900;

    text-align: center;
}


.quadratic-nine-discriminant-grid article {
    min-height: 220px;

    padding: 22px;

    background: var(--quadratic9-soft);

    border: 1px solid var(--quadratic9-border);
    border-radius: 20px;
}


.quadratic-nine-discriminant-grid span {
    display: block;

    margin-bottom: 13px;

    color: var(--quadratic9-primary);

    font-weight: 900;
}


.quadratic-nine-discriminant-grid strong {
    display: block;

    margin-bottom: 12px;
}


.quadratic-nine-discriminant-grid p {
    margin: 0;

    color: var(--quadratic9-muted);

    line-height: 1.65;
}


/* ==========================================================
   QUADRATIC FORMULA
========================================================== */

.quadratic-nine-formula-section {
    background: var(--quadratic9-soft);
}


.quadratic-nine-formula-card {
    padding: 30px;

    color: #ffffff;

    background:
        linear-gradient(
            145deg,
            #3b0764,
            #0f172a
        );

    border-radius: 25px;

    text-align: center;
}


.quadratic-nine-formula-card > span {
    display: block;

    margin-bottom: 12px;

    color: rgba(255, 255, 255, 0.62);
}


.quadratic-nine-formula-card > strong {
    display: block;

    margin-bottom: 22px;

    color: #f9a8d4;

    font-size: clamp(
        1.3rem,
        3vw,
        2rem
    );
}


.quadratic-nine-formula-card > div {
    display: grid;

    grid-template-columns:
        repeat(2, minmax(0, 1fr));

    gap: 8px;
}


.quadratic-nine-formula-card p {
    margin: 0;
    padding: 13px;

    background: rgba(255, 255, 255, 0.07);

    border-radius: 12px;
}


.quadratic-nine-formula-example-section {
    background: #ffffff;
}


/* ==========================================================
   MISTAKES + STRATEGY
========================================================== */

.quadratic-nine-mistake-section {
    background: var(--quadratic9-soft);
}


.quadratic-nine-mistake-grid article {
    background: #ffffff;

    border-color: var(--quadratic9-border);
}


.quadratic-nine-strategy-section {
    background: #ffffff;
}


.quadratic-nine-strategy-grid {
    display: grid;

    grid-template-columns:
        repeat(4, minmax(0, 1fr));

    gap: 14px;
}


.quadratic-nine-strategy-grid article {
    min-height: 230px;

    padding: 22px;

    background: var(--quadratic9-soft);

    border: 1px solid var(--quadratic9-border);
    border-radius: 20px;
}


.quadratic-nine-strategy-grid h3 {
    margin: 0 0 8px;
}


.quadratic-nine-strategy-grid p {
    margin: 0;

    color: var(--quadratic9-muted);

    line-height: 1.65;
}


/* ==========================================================
   LAB
========================================================== */

.quadratic-nine-lab-section {
    color: #ffffff;

    background: #0f172a;
}


.quadratic-nine-lab-section .section-eyebrow {
    color: #d8b4fe;
}


.quadratic-nine-lab-section .section-header p {
    color: #94a3b8;
}


.quadratic-nine-lab-card {
    max-width: 1080px;

    margin: 0 auto 20px;
    padding: 30px;

    background: rgba(255, 255, 255, 0.06);

    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 28px;
}


.quadratic-nine-lab-heading {
    margin-bottom: 24px;

    text-align: center;
}


.quadratic-nine-lab-heading > span {
    display: block;

    margin-bottom: 5px;

    color: #d8b4fe;

    font-size: 0.6rem;
    font-weight: 850;
    text-transform: uppercase;
}


.quadratic-nine-lab-heading h3 {
    margin: 0 0 7px;

    color: #ffffff;
}


.quadratic-nine-lab-heading p {
    margin: 0;

    color: #94a3b8;
}


/* ==========================================================
   COEFFICIENT CALCULATOR
========================================================== */

.quadratic-nine-coefficient-controls,
.quadratic-nine-factor-controls {
    display: grid;

    grid-template-columns:
        repeat(3, minmax(0, 1fr));

    gap: 8px;

    margin-bottom: 12px;
}


.quadratic-nine-factor-controls {
    grid-template-columns:
        repeat(2, minmax(0, 1fr));
}


.quadratic-nine-coefficient-controls label,
.quadratic-nine-factor-controls label {
    padding: 14px;

    color: #334155;
    background: #ffffff;

    border-radius: 13px;
}


.quadratic-nine-coefficient-controls label > span,
.quadratic-nine-factor-controls label > span {
    display: block;

    margin-bottom: 7px;

    color: var(--quadratic9-muted);

    font-size: 0.54rem;
    font-weight: 850;
}


.quadratic-nine-coefficient-controls input,
.quadratic-nine-factor-controls input {
    width: 100%;

    padding: 10px;

    border: 1px solid var(--quadratic9-border);
    border-radius: 9px;
}


.quadratic-nine-equation-display {
    margin-bottom: 12px;
    padding: 18px;

    color: #334155;
    background: #ffffff;

    border-radius: 15px;

    text-align: center;
}


.quadratic-nine-equation-display span,
.quadratic-nine-equation-display strong {
    display: block;
}


.quadratic-nine-equation-display span {
    margin-bottom: 7px;

    color: var(--quadratic9-muted);

    font-size: 0.52rem;
}


.quadratic-nine-equation-display strong {
    color: var(--quadratic9-primary-dark);

    font-size: 1.3rem;
}


.quadratic-nine-lab-results {
    display: grid;

    grid-template-columns:
        repeat(4, minmax(0, 1fr));

    gap: 8px;

    margin-bottom: 12px;
}


.quadratic-nine-lab-results > div,
.quadratic-nine-factor-root-results > div {
    min-height: 105px;

    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;

    padding: 13px;

    color: #334155;
    background: #ffffff;

    border-radius: 13px;

    text-align: center;
}


.quadratic-nine-lab-results span,
.quadratic-nine-lab-results strong,
.quadratic-nine-factor-root-results span,
.quadratic-nine-factor-root-results strong {
    display: block;
}


.quadratic-nine-lab-results span,
.quadratic-nine-factor-root-results span {
    margin-bottom: 5px;

    color: var(--quadratic9-muted);

    font-size: 0.49rem;
    text-transform: uppercase;
}


.quadratic-nine-lab-results strong,
.quadratic-nine-factor-root-results strong {
    color: var(--quadratic9-primary-dark);
}


.quadratic-nine-lab-message {
    margin-bottom: 12px;
    padding: 14px;

    color: #e9d5ff;
    background: rgba(124, 58, 237, 0.12);

    border: 1px solid rgba(196, 181, 253, 0.2);
    border-radius: 11px;

    text-align: center;

    line-height: 1.6;
}


.quadratic-nine-preset-buttons,
.quadratic-nine-factor-presets {
    display: grid;

    grid-template-columns:
        repeat(4, minmax(0, 1fr));

    gap: 8px;
}


.quadratic-nine-preset-buttons button,
.quadratic-nine-factor-presets button {
    min-height: 44px;

    padding: 10px;

    color: #cbd5e1;
    background: rgba(255, 255, 255, 0.06);

    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;

    font-weight: 800;
}


/* ==========================================================
   FACTOR LAB
========================================================== */

.quadratic-nine-factor-machine {
    display: grid;

    grid-template-columns:
        1fr auto 1fr auto 1.2fr;

    align-items: center;

    gap: 8px;

    margin-bottom: 12px;
}


.quadratic-nine-factor-machine > div {
    min-height: 145px;

    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;

    padding: 14px;

    color: #334155;
    background: #ffffff;

    border-radius: 14px;

    text-align: center;
}


.quadratic-nine-factor-machine span,
.quadratic-nine-factor-machine strong {
    display: block;
}


.quadratic-nine-factor-machine span {
    margin-bottom: 6px;

    color: var(--quadratic9-muted);

    font-size: 0.51rem;
}


.quadratic-nine-factor-machine strong {
    color: var(--quadratic9-primary-dark);
}


.quadratic-nine-factor-machine > i {
    color: #f9a8d4;

    font-style: normal;
    font-weight: 900;
}


.quadratic-nine-factor-machine .result {
    color: #ffffff;
    background: var(--quadratic9-green);
}


.quadratic-nine-factor-machine .result span,
.quadratic-nine-factor-machine .result strong {
    color: #ffffff;
}


.quadratic-nine-factor-root-results {
    display: grid;

    grid-template-columns:
        repeat(2, minmax(0, 1fr));

    gap: 8px;

    margin-bottom: 12px;
}


/* ==========================================================
   PRACTICE
========================================================== */

.quadratic-nine-practice-section {
    background: var(--quadratic9-soft);
}


.quadratic-nine-practice-grid article {
    min-height: 300px;

    background: #ffffff;

    border-color: var(--quadratic9-border);
}


.quadratic-nine-practice-grid h3 {
    min-height: 100px;

    margin: 0 0 18px;
}


.quadratic-nine-practice-grid details {
    padding-top: 14px;

    border-top: 1px solid var(--quadratic9-border);
}


.quadratic-nine-practice-grid summary {
    color: var(--quadratic9-primary-dark);

    cursor: pointer;

    font-weight: 800;
}


.quadratic-nine-practice-grid details p {
    color: var(--quadratic9-muted);

    line-height: 1.65;
}


/* ==========================================================
   QUIZ
========================================================== */

.quadratic-nine-quiz-section {
    background: #ffffff;
}


.quadratic-nine-quiz-wrapper {
    max-width: 980px;

    margin-inline: auto;
}


.quadratic-nine-quiz-heading {
    margin-bottom: 25px;

    text-align: center;
}


.quadratic-nine-quiz-heading h2 {
    margin: 8px 0;
}


.quadratic-nine-quiz-heading p {
    margin: 0;

    color: var(--quadratic9-muted);
}


.quadratic-nine-quiz-card {
    padding: 28px;

    background: var(--quadratic9-soft);

    border: 1px solid var(--quadratic9-border);
    border-radius: 26px;
}


.quadratic-nine-quiz-question {
    padding: 22px 0;

    border-bottom: 1px solid var(--quadratic9-border);
}


.quadratic-nine-quiz-question:first-child {
    padding-top: 0;
}


.quadratic-nine-quiz-question > span {
    display: block;

    margin-bottom: 8px;

    color: var(--quadratic9-primary);

    font-size: 0.58rem;
    font-weight: 900;
}


.quadratic-nine-quiz-question h3 {
    margin: 0 0 15px;
}


.quadratic-nine-quiz-options {
    display: grid;

    grid-template-columns:
        repeat(3, minmax(0, 1fr));

    gap: 8px;
}


.quadratic-nine-quiz-options button {
    min-height: 48px;

    padding: 10px;

    color: #334155;
    background: #ffffff;

    border: 1px solid var(--quadratic9-border);
    border-radius: 11px;

    font-weight: 750;
}


.quadratic-nine-quiz-options button.selected {
    color: var(--quadratic9-primary-dark);
    background: var(--quadratic9-primary-soft);
    border-color: #c4b5fd;
}


.quadratic-nine-quiz-options button.correct {
    color: #166534;
    background: #dcfce7;
    border-color: #86efac;
}


.quadratic-nine-quiz-options button.incorrect {
    color: #991b1b;
    background: #fee2e2;
    border-color: #fca5a5;
}


.quadratic-nine-quiz-footer {
    display: flex;
    align-items: center;
    flex-wrap: wrap;

    gap: 10px;

    padding-top: 22px;
}


.quadratic-nine-quiz-result {
    flex-basis: 100%;

    color: #334155;

    font-weight: 750;
}


/* ==========================================================
   SUMMARY
========================================================== */

.quadratic-nine-summary-section {
    background: var(--quadratic9-soft);
}


.quadratic-nine-summary-card {
    padding: 35px;

    color: #ffffff;

    background:
        linear-gradient(
            135deg,
            #6d28d9,
            #7c3aed 48%,
            #be185d
        );

    border-radius: 28px;
}


.quadratic-nine-summary-card > div:first-child {
    margin-bottom: 25px;
}


.quadratic-nine-summary-card > div:first-child > span {
    display: block;

    margin-bottom: 6px;

    color: rgba(255, 255, 255, 0.67);

    font-size: 0.6rem;
    font-weight: 850;
    text-transform: uppercase;
}


.quadratic-nine-summary-card h2 {
    margin: 0;

    color: #ffffff;
}


.quadratic-nine-summary-grid {
    display: grid;

    grid-template-columns:
        repeat(2, minmax(0, 1fr));

    gap: 10px;
}


.quadratic-nine-summary-grid p {
    margin: 0;
    padding: 16px;

    color: rgba(255, 255, 255, 0.78);
    background: rgba(255, 255, 255, 0.07);

    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 14px;

    line-height: 1.65;
}


.quadratic-nine-summary-grid strong {
    color: #f9a8d4;
}


/* ==========================================================
   NAVIGATION
========================================================== */

.quadratic-nine-navigation-section {
    padding: 40px 0 70px;

    background: #ffffff;
}


.quadratic-nine-navigation {
    display: grid;

    grid-template-columns:
        repeat(2, minmax(0, 1fr));

    gap: 12px;
}


.quadratic-nine-navigation-card {
    display: flex;
    align-items: center;

    gap: 15px;

    padding: 20px;

    color: #334155;
    background: var(--quadratic9-soft);

    border: 1px solid var(--quadratic9-border);
    border-radius: 17px;

    text-decoration: none;
}


.quadratic-nine-navigation-card.next {
    justify-content: flex-end;

    text-align: right;
}


.quadratic-nine-navigation-card > span {
    color: var(--quadratic9-primary);

    font-size: 1.25rem;
    font-weight: 900;
}


.quadratic-nine-navigation-card small,
.quadratic-nine-navigation-card strong,
.quadratic-nine-navigation-card div > span {
    display: block;
}


.quadratic-nine-navigation-card small {
    margin-bottom: 4px;

    color: var(--quadratic9-muted);
}


.quadratic-nine-navigation-card div > span {
    margin-top: 4px;

    color: var(--quadratic9-muted);

    font-size: 0.62rem;
}


.quadratic-nine-navigation-card.disabled {
    opacity: 0.58;

    cursor: default;
}


/* ==========================================================
   RESPONSIVE
========================================================== */

@media (max-width: 1120px) {

    .quadratic-nine-hero-container,
    .quadratic-nine-two-column {
        grid-template-columns: 1fr;

        gap: 48px;
    }


    .quadratic-nine-hero-content {
        max-width: 820px;
    }


    .quadratic-nine-hero-visual,
    .quadratic-nine-anatomy-card,
    .quadratic-nine-root-check-card,
    .quadratic-nine-zero-product-card,
    .quadratic-nine-formula-card {
        width: 100%;
        max-width: 820px;

        margin-inline: auto;
    }


    .quadratic-nine-strategy-grid {
        grid-template-columns:
            repeat(2, minmax(0, 1fr));
    }

}


@media (max-width: 880px) {

    .quadratic-nine-example-grid,
    .quadratic-nine-discriminant-grid,
    .quadratic-nine-mistake-grid,
    .quadratic-nine-practice-grid {
        grid-template-columns: 1fr;
    }


    .quadratic-nine-lab-results,
    .quadratic-nine-preset-buttons,
    .quadratic-nine-factor-presets {
        grid-template-columns:
            repeat(2, minmax(0, 1fr));
    }

}


@media (max-width: 680px) {

    .quadratic-equation-grade-nine-page .section {
        padding: 62px 0;
    }


    .quadratic-nine-hero {
        padding: 52px 0 64px;
    }


    .quadratic-nine-hero-content h1 {
        font-size: clamp(
            2.35rem,
            10.7vw,
            3.55rem
        );
    }


    .quadratic-nine-hero-actions {
        flex-direction: column;
    }


    .quadratic-nine-hero-actions .button {
        width: 100%;
    }


    .quadratic-nine-hero-meta,
    .quadratic-nine-objective-list,
    .quadratic-nine-anatomy-card,
    .quadratic-nine-strategy-grid,
    .quadratic-nine-summary-grid,
    .quadratic-nine-navigation {
        grid-template-columns: 1fr;
    }


    .quadratic-nine-board-flow,
    .quadratic-nine-root-check-card > div,
    .quadratic-nine-factor-flow,
    .quadratic-nine-formula-flow,
    .quadratic-nine-factor-machine {
        grid-template-columns: 1fr;
    }


    .quadratic-nine-board-flow > i,
    .quadratic-nine-root-check-card i,
    .quadratic-nine-factor-flow > i,
    .quadratic-nine-formula-flow > i,
    .quadratic-nine-factor-machine > i {
        justify-self: center;
    }


    .quadratic-nine-board-flow > i,
    .quadratic-nine-factor-flow > i,
    .quadratic-nine-formula-flow > i {
        transform: rotate(90deg);
    }


    .quadratic-nine-board-footer {
        grid-template-columns:
            repeat(2, minmax(0, 1fr));
    }


    .quadratic-nine-zero-branches,
    .quadratic-nine-formula-card > div,
    .quadratic-nine-coefficient-controls,
    .quadratic-nine-factor-controls,
    .quadratic-nine-lab-results,
    .quadratic-nine-factor-root-results {
        grid-template-columns: 1fr;
    }


    .quadratic-nine-quiz-options {
        grid-template-columns: 1fr;
    }


    .quadratic-nine-navigation-card.next {
        justify-content: flex-start;

        text-align: left;
    }

}


@media (max-width: 460px) {

    .quadratic-nine-board,
    .quadratic-nine-lab-card,
    .quadratic-nine-quiz-card,
    .quadratic-nine-summary-card {
        padding: 20px;
    }


    .quadratic-nine-board-footer,
    .quadratic-nine-preset-buttons,
    .quadratic-nine-factor-presets {
        grid-template-columns: 1fr;
    }

}