/* ==========================================================
   BELAJAREDUTECH
   PERSAMAAN LINEAR
   MATEMATIKA SMP KELAS 7
========================================================== */

.equation-grade-seven-page {
    --equation7-primary: #4f46e5;
    --equation7-primary-dark: #3730a3;
    --equation7-primary-soft: #eef2ff;

    --equation7-secondary: #0891b2;
    --equation7-secondary-soft: #ecfeff;

    --equation7-green: #0f766e;
    --equation7-green-soft: #f0fdfa;

    --equation7-orange: #c2410c;
    --equation7-orange-soft: #fff7ed;

    --equation7-red: #b91c1c;
    --equation7-red-soft: #fef2f2;
}


/* ==========================================================
   GLOBAL
========================================================== */

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


.equation-seven-footer-disabled {
    display: block;

    margin-bottom: 8px;

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

    cursor: default;
}


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

.equation-seven-breadcrumb-section {
    border-bottom:
        1px solid
        var(--color-border, #e2e8f0);

    background: #ffffff;
}


.equation-seven-breadcrumb {
    min-height: 54px;

    display: flex;

    align-items: center;

    flex-wrap: wrap;

    gap: 8px;

    color:
        var(--color-text-muted, #64748b);

    font-size: 0.76rem;
}


.equation-seven-breadcrumb a {
    color:
        var(--color-text-muted, #64748b);

    text-decoration: none;
}


.equation-seven-breadcrumb a:hover {
    color:
        var(--equation7-primary);
}


.equation-seven-breadcrumb strong {
    color:
        var(--color-text-secondary, #334155);
}


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

.equation-seven-hero {
    position: relative;

    overflow: hidden;

    padding:
        76px 0 88px;

    background:
        radial-gradient(
            circle at 88% 16%,
            rgba(79, 70, 229, 0.15),
            transparent 30%
        ),
        radial-gradient(
            circle at 12% 88%,
            rgba(8, 145, 178, 0.09),
            transparent 30%
        ),
        linear-gradient(
            180deg,
            #f8faff,
            #ffffff
        );
}


.equation-seven-hero-container {
    display: grid;

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

    align-items: center;

    gap: 52px;
}


.equation-seven-hero-content,
.equation-seven-hero-visual {
    min-width: 0;
}


.equation-seven-topic-badge {
    width: fit-content;

    display: flex;

    align-items: center;

    gap: 10px;

    margin-bottom: 14px;

    color:
        var(--equation7-primary-dark);

    font-size: 0.67rem;

    font-weight: 850;

    text-transform: uppercase;

    letter-spacing: 0.06em;
}


.equation-seven-topic-badge span {
    width: 36px;
    height: 36px;

    display: grid;

    place-items: center;

    color: #ffffff;

    background:
        var(--equation7-primary);

    border-radius: 11px;

    font-size: 0.6rem;
}


.equation-seven-hero-content h1 {
    max-width: 680px;

    margin:
        0 0 22px;

    font-size:
        clamp(
            3rem,
            4.8vw,
            4.8rem
        );

    line-height: 1.01;

    letter-spacing: -0.052em;
}


.equation-seven-hero-content > p {
    max-width: 650px;

    color:
        var(--color-text-muted, #64748b);

    font-size: 1rem;

    line-height: 1.8;
}


.equation-seven-hero-actions {
    display: flex;

    flex-wrap: wrap;

    gap: 12px;

    margin-top: 30px;
}


.equation-seven-hero-meta {
    max-width: 610px;

    display: grid;

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

    gap: 10px;

    margin-top: 34px;
}


.equation-seven-hero-meta > div {
    padding: 16px;

    background:
        rgba(255, 255, 255, 0.8);

    border:
        1px solid
        var(--color-border, #e2e8f0);

    border-radius: 14px;
}


.equation-seven-hero-meta strong,
.equation-seven-hero-meta span {
    display: block;
}


.equation-seven-hero-meta strong {
    margin-bottom: 4px;

    color:
        var(--equation7-primary);

    font-size: 1.15rem;
}


.equation-seven-hero-meta span {
    color:
        var(--color-text-muted, #64748b);

    font-size: 0.7rem;
}


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

.equation-seven-hero-visual {
    width: 100%;

    max-width: 620px;

    margin-left: auto;
}


.equation-seven-board {
    padding: 30px;

    color: #ffffff;

    background:
        linear-gradient(
            145deg,
            #312e81,
            #4338ca 46%,
            #0e7490
        );

    border-radius: 30px;

    box-shadow:
        0 32px 85px
        rgba(49, 46, 129, 0.24);
}


.equation-seven-board-label {
    display: block;

    margin-bottom: 19px;

    color:
        rgba(255, 255, 255, 0.64);

    font-size: 0.61rem;

    font-weight: 850;

    text-transform: uppercase;

    letter-spacing: 0.08em;
}


.equation-seven-board-equation {
    display: grid;

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

    align-items: center;

    gap: 11px;

    margin-bottom: 13px;
}


.equation-seven-board-equation > div {
    min-height: 125px;

    display: flex;
    flex-direction: column;

    align-items: center;
    justify-content: center;

    padding: 17px;

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

    border:
        1px solid
        rgba(255, 255, 255, 0.11);

    border-radius: 17px;

    text-align: center;
}


.equation-seven-board-equation small,
.equation-seven-board-equation strong {
    display: block;
}


.equation-seven-board-equation small {
    margin-bottom: 6px;

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


.equation-seven-board-equation strong {
    font-size: 1.5rem;
}


.equation-seven-board-equation > i {
    color: #67e8f9;

    font-style: normal;

    font-size: 1.5rem;

    font-weight: 900;
}


.equation-seven-board-step {
    margin-bottom: 13px;

    padding: 15px;

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

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

    border-radius: 14px;

    text-align: center;
}


.equation-seven-board-step span,
.equation-seven-board-step strong {
    display: block;
}


.equation-seven-board-step span {
    margin-bottom: 5px;

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

    font-size: 0.58rem;
}


.equation-seven-board-result {
    padding: 17px;

    color:
        var(--color-text-secondary, #334155);

    background: #ffffff;

    border-radius: 16px;

    text-align: center;
}


.equation-seven-board-result span,
.equation-seven-board-result strong,
.equation-seven-board-result small {
    display: block;
}


.equation-seven-board-result span {
    margin-bottom: 4px;

    color:
        var(--color-text-muted, #64748b);

    font-size: 0.57rem;
}


.equation-seven-board-result strong {
    margin-bottom: 5px;

    color:
        var(--equation7-primary-dark);

    font-size: 1.4rem;
}


.equation-seven-board-result small {
    color:
        var(--equation7-green);
}


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

.equation-seven-progress-section {
    padding:
        14px 0;

    border-top:
        1px solid
        var(--color-border, #e2e8f0);

    border-bottom:
        1px solid
        var(--color-border, #e2e8f0);

    background: #ffffff;
}


.equation-seven-progress-list {
    display: flex;

    align-items: center;

    gap: 8px;

    overflow-x: auto;

    padding-bottom: 3px;
}


.equation-seven-progress-list a {
    flex-shrink: 0;

    display: flex;

    align-items: center;

    gap: 7px;

    padding:
        8px 11px;

    color:
        var(--color-text-muted, #64748b);

    background:
        var(--color-background-soft, #f8fafc);

    border:
        1px solid
        var(--color-border, #e2e8f0);

    border-radius: 999px;

    text-decoration: none;

    font-size: 0.68rem;

    font-weight: 750;
}


.equation-seven-progress-list a:hover {
    color:
        var(--equation7-primary-dark);

    border-color: #c7d2fe;

    background:
        var(--equation7-primary-soft);
}


.equation-seven-progress-list span {
    color:
        var(--equation7-primary);

    font-size: 0.58rem;

    font-weight: 900;
}


/* ==========================================================
   TWO COLUMN
========================================================== */

.equation-seven-two-column {
    display: grid;

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

    align-items: center;

    gap: 70px;
}


.equation-seven-section-content h2 {
    margin:
        12px 0 18px;

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

    line-height: 1.05;

    letter-spacing: -0.045em;
}


.equation-seven-section-content p {
    color:
        var(--color-text-muted, #64748b);

    line-height: 1.8;
}


/* ==========================================================
   OBJECTIVE
========================================================== */

.equation-seven-objective-section {
    background: #ffffff;
}


.equation-seven-objective-list {
    display: grid;

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

    gap: 10px;
}


.equation-seven-objective-list article {
    min-height: 145px;

    padding: 18px;

    background:
        var(--color-background-soft, #f8fafc);

    border:
        1px solid
        var(--color-border, #e2e8f0);

    border-radius: 17px;
}


.equation-seven-objective-list article > span {
    width: 36px;
    height: 36px;

    display: grid;

    place-items: center;

    margin-bottom: 10px;

    color: #ffffff;

    background:
        var(--equation7-primary);

    border-radius: 50%;

    font-size: 0.55rem;

    font-weight: 900;
}


.equation-seven-objective-list p {
    margin: 0;

    color:
        var(--color-text-muted, #64748b);

    line-height: 1.65;
}


/* ==========================================================
   INTRO
========================================================== */

.equation-seven-intro-section {
    background:
        var(--color-background-soft, #f8fafc);
}


.equation-seven-intro-board {
    display: grid;

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

    align-items: center;

    gap: 10px;

    padding: 27px;

    color: #ffffff;

    background:
        linear-gradient(
            145deg,
            #312e81,
            #0f172a
        );

    border-radius: 26px;
}


.equation-seven-intro-board > div {
    min-height: 145px;

    display: flex;
    flex-direction: column;

    align-items: center;
    justify-content: center;

    padding: 18px;

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

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

    border-radius: 17px;

    text-align: center;
}


.equation-seven-intro-board span,
.equation-seven-intro-board strong {
    display: block;
}


.equation-seven-intro-board span {
    margin-bottom: 6px;

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

    font-size: 0.58rem;
}


.equation-seven-intro-board strong {
    font-size: 1.4rem;
}


.equation-seven-intro-board > i {
    color: #67e8f9;

    font-style: normal;

    font-size: 1.4rem;

    font-weight: 900;
}


/* ==========================================================
   PARTS
========================================================== */

.equation-seven-parts-section {
    background: #ffffff;
}


.equation-seven-parts-grid {
    display: grid;

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

    gap: 14px;
}


.equation-seven-parts-grid article {
    min-height: 270px;

    padding: 23px;

    background:
        var(--color-background-soft, #f8fafc);

    border:
        1px solid
        var(--color-border, #e2e8f0);

    border-radius: 21px;
}


.equation-seven-part-icon {
    width: 50px;
    height: 50px;

    display: grid;

    place-items: center;

    margin-bottom: 16px;

    color: #ffffff;

    background:
        linear-gradient(
            135deg,
            var(--equation7-primary),
            var(--equation7-secondary)
        );

    border-radius: 14px;

    font-weight: 900;
}


.equation-seven-parts-grid h3 {
    margin:
        0 0 7px;
}


.equation-seven-parts-grid article > strong {
    display: block;

    margin-bottom: 9px;

    color:
        var(--equation7-primary-dark);
}


.equation-seven-parts-grid p {
    margin: 0;

    color:
        var(--color-text-muted, #64748b);

    line-height: 1.65;
}


/* ==========================================================
   BALANCE
========================================================== */

.equation-seven-balance-section {
    background:
        var(--color-background-soft, #f8fafc);
}


.equation-seven-balance-card {
    padding: 27px;

    color: #ffffff;

    background:
        linear-gradient(
            145deg,
            #312e81,
            #0f172a
        );

    border-radius: 26px;
}


.equation-seven-balance-row {
    display: grid;

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

    align-items: center;

    gap: 12px;
}


.equation-seven-balance-row > div {
    min-height: 105px;

    display: flex;

    flex-direction: column;

    align-items: center;
    justify-content: center;

    padding: 15px;

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

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

    border-radius: 15px;
}


.equation-seven-balance-row span,
.equation-seven-balance-row strong {
    display: block;
}


.equation-seven-balance-row > div span {
    margin-bottom: 5px;

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

    font-size: 0.55rem;
}


.equation-seven-balance-row strong {
    font-size: 1.2rem;
}


.equation-seven-balance-equal {
    color: #67e8f9;

    font-size: 1.4rem;

    font-weight: 900;
}


.equation-seven-balance-operation {
    margin:
        12px 0;

    padding: 14px;

    color:
        var(--color-text-secondary, #334155);

    background: #ffffff;

    border-radius: 14px;

    text-align: center;
}


.equation-seven-balance-operation span,
.equation-seven-balance-operation strong {
    display: block;
}


.equation-seven-balance-operation span {
    margin-bottom: 4px;

    color:
        var(--color-text-muted, #64748b);

    font-size: 0.57rem;
}


.equation-seven-balance-operation strong {
    color:
        var(--equation7-primary-dark);
}


.equation-seven-balance-row.result > div {
    background:
        rgba(15, 118, 110, 0.35);
}


/* ==========================================================
   SOLVING
========================================================== */

.equation-seven-solving-section {
    background: #ffffff;
}


.equation-seven-solving-grid {
    display: grid;

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

    gap: 14px;
}


.equation-seven-solving-grid article {
    min-height: 300px;

    display: flex;
    flex-direction: column;

    align-items: center;

    padding: 22px;

    background:
        var(--color-background-soft, #f8fafc);

    border:
        1px solid
        var(--color-border, #e2e8f0);

    border-radius: 21px;

    text-align: center;
}


.equation-seven-solving-grid article > span {
    margin-bottom: 17px;

    color:
        var(--equation7-primary);

    font-size: 0.58rem;

    font-weight: 850;

    text-transform: uppercase;
}


.equation-seven-solving-grid article > strong {
    color:
        var(--equation7-primary-dark);

    font-size: 1.1rem;
}


.equation-seven-solving-grid article > i {
    margin:
        13px 0;

    color:
        var(--equation7-secondary);

    font-style: normal;

    font-weight: 900;
}


.equation-seven-solving-grid p {
    min-height: 60px;

    margin:
        0 0 13px;

    color:
        var(--color-text-muted, #64748b);

    line-height: 1.6;
}


.equation-seven-solving-grid .result {
    margin-top: auto;

    color:
        var(--equation7-green);
}


/* ==========================================================
   TWO STEP
========================================================== */

.equation-seven-two-step-section {
    background:
        var(--color-background-soft, #f8fafc);
}


.equation-seven-step-card {
    display: grid;

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

    align-items: center;

    gap: 9px;

    padding: 27px;

    background:
        var(--equation7-primary-soft);

    border:
        1px solid #c7d2fe;

    border-radius: 25px;
}


.equation-seven-step-card > div {
    min-height: 130px;

    display: flex;
    flex-direction: column;

    align-items: center;
    justify-content: center;

    padding: 16px;

    background: #ffffff;

    border-radius: 16px;

    text-align: center;
}


.equation-seven-step-card span,
.equation-seven-step-card strong {
    display: block;
}


.equation-seven-step-card span {
    margin-bottom: 6px;

    color:
        var(--color-text-muted, #64748b);

    font-size: 0.56rem;
}


.equation-seven-step-card strong {
    color:
        var(--equation7-primary-dark);
}


.equation-seven-step-card > i {
    color:
        var(--equation7-secondary);

    font-style: normal;

    font-weight: 900;
}


/* ==========================================================
   EXAMPLE
========================================================== */

.equation-seven-example-section {
    background: #ffffff;
}


.equation-seven-example-grid {
    display: grid;

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

    gap: 16px;
}


.equation-seven-example-grid article {
    min-height: 310px;

    padding: 23px;

    background:
        var(--color-background-soft, #f8fafc);

    border:
        1px solid
        var(--color-border, #e2e8f0);

    border-radius: 21px;
}


.equation-seven-example-grid article > span {
    display: block;

    margin-bottom: 13px;

    color:
        var(--equation7-primary);

    font-size: 0.58rem;

    font-weight: 850;
}


.equation-seven-example-grid article > strong {
    display: block;

    margin-bottom: 17px;

    color:
        var(--equation7-primary-dark);

    font-size: 1.2rem;
}


.equation-seven-example-grid article > div {
    padding: 16px;

    background: #ffffff;

    border-radius: 14px;
}


.equation-seven-example-grid p {
    margin:
        0 0 8px;

    color:
        var(--color-text-muted, #64748b);
}


.equation-seven-example-grid p:last-child {
    margin-bottom: 0;

    color:
        var(--equation7-green);

    font-weight: 850;
}


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

.equation-seven-check-section {
    background:
        var(--color-background-soft, #f8fafc);
}


.equation-seven-check-card {
    display: grid;

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

    align-items: center;

    gap: 9px;

    padding: 27px;

    color: #ffffff;

    background:
        linear-gradient(
            145deg,
            #312e81,
            #0f172a
        );

    border-radius: 25px;
}


.equation-seven-check-card > div {
    min-height: 130px;

    display: flex;
    flex-direction: column;

    align-items: center;
    justify-content: center;

    padding: 16px;

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

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

    border-radius: 16px;

    text-align: center;
}


.equation-seven-check-card span,
.equation-seven-check-card strong {
    display: block;
}


.equation-seven-check-card span {
    margin-bottom: 6px;

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

    font-size: 0.56rem;
}


.equation-seven-check-card > i {
    color: #67e8f9;

    font-style: normal;

    font-weight: 900;
}


.equation-seven-check-card .success {
    background:
        var(--equation7-green);
}


/* ==========================================================
   MODEL
========================================================== */

.equation-seven-model-section {
    background: #ffffff;
}


.equation-seven-model-grid {
    display: grid;

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

    gap: 16px;
}


.equation-seven-model-grid article {
    min-height: 310px;

    padding: 23px;

    background:
        var(--color-background-soft, #f8fafc);

    border:
        1px solid
        var(--color-border, #e2e8f0);

    border-radius: 21px;
}


.equation-seven-model-grid article > span {
    display: block;

    margin-bottom: 12px;

    color:
        var(--equation7-primary);

    font-size: 0.58rem;

    font-weight: 850;
}


.equation-seven-model-grid article > p {
    min-height: 100px;

    margin:
        0 0 15px;

    color:
        var(--color-text-muted, #64748b);

    line-height: 1.7;
}


.equation-seven-model-grid article > div {
    padding: 15px;

    background: #ffffff;

    border-radius: 13px;
}


.equation-seven-model-grid small,
.equation-seven-model-grid div strong {
    display: block;
}


.equation-seven-model-grid small {
    margin-bottom: 5px;

    color:
        var(--color-text-muted, #64748b);
}


.equation-seven-model-grid div strong {
    color:
        var(--equation7-primary-dark);

    font-size: 1.15rem;
}


.equation-seven-model-grid .answer {
    min-height: auto;

    margin-top: 12px;

    color:
        var(--equation7-green);

    font-weight: 850;
}


/* ==========================================================
   STRATEGY
========================================================== */

.equation-seven-strategy-section {
    background:
        var(--color-background-soft, #f8fafc);
}


.equation-seven-strategy-grid {
    display: grid;

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

    gap: 14px;
}


.equation-seven-strategy-grid article {
    min-height: 225px;

    padding: 22px;

    background: #ffffff;

    border:
        1px solid
        var(--color-border, #e2e8f0);

    border-radius: 21px;
}


.equation-seven-strategy-grid article > span {
    width: 40px;
    height: 40px;

    display: grid;

    place-items: center;

    margin-bottom: 15px;

    color: #ffffff;

    background:
        var(--equation7-primary);

    border-radius: 50%;

    font-size: 0.56rem;

    font-weight: 900;
}


.equation-seven-strategy-grid h3 {
    margin:
        0 0 8px;
}


.equation-seven-strategy-grid p {
    margin: 0;

    color:
        var(--color-text-muted, #64748b);

    line-height: 1.65;
}


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

.equation-seven-lab-section {
    color: #ffffff;

    background: #0f172a;
}


.equation-seven-lab-section .section-eyebrow {
    color: #93c5fd;
}


.equation-seven-lab-section .section-header p {
    color: #94a3b8;
}


.equation-seven-lab-card {
    max-width: 1040px;

    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;
}


.equation-seven-lab-heading {
    margin-bottom: 24px;

    text-align: center;
}


.equation-seven-lab-heading > span {
    display: block;

    margin-bottom: 5px;

    color: #93c5fd;

    font-size: 0.6rem;

    font-weight: 850;

    text-transform: uppercase;
}


.equation-seven-lab-heading h3 {
    margin:
        0 0 7px;

    color: #ffffff;
}


.equation-seven-lab-heading p {
    margin: 0;

    color: #94a3b8;
}


/* ==========================================================
   CONTROLS
========================================================== */

.equation-seven-balance-lab,
.equation-seven-builder-grid {
    display: grid;

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

    gap: 10px;

    margin-bottom: 13px;
}


.equation-seven-control-card {
    min-height: 180px;

    display: flex;
    flex-direction: column;

    align-items: center;
    justify-content: center;

    padding: 17px;

    color:
        var(--color-text-secondary, #334155);

    background: #ffffff;

    border-radius: 18px;
}


.equation-seven-control-card > span {
    margin-bottom: 7px;

    color:
        var(--color-text-muted, #64748b);

    font-size: 0.55rem;

    font-weight: 850;

    text-transform: uppercase;
}


.equation-seven-control-card > strong {
    color:
        var(--equation7-primary);

    font-size: 2rem;
}


.equation-seven-control-card > div {
    display: flex;

    gap: 8px;

    margin-top: 12px;
}


.equation-seven-control-card button {
    min-width: 58px;

    padding:
        9px 11px;

    color:
        var(--equation7-primary-dark);

    background:
        var(--equation7-primary-soft);

    border:
        1px solid #c7d2fe;

    border-radius: 9px;

    font-weight: 850;
}


.equation-seven-control-card button:disabled {
    opacity: 0.35;

    cursor: not-allowed;
}


.equation-seven-live-equation {
    min-height: 180px;

    display: flex;

    flex-direction: column;

    align-items: center;
    justify-content: center;

    padding: 18px;

    background:
        linear-gradient(
            135deg,
            var(--equation7-primary),
            var(--equation7-secondary)
        );

    border-radius: 18px;

    text-align: center;
}


.equation-seven-live-equation span,
.equation-seven-live-equation strong {
    display: block;
}


.equation-seven-live-equation span {
    margin-bottom: 7px;

    color:
        rgba(255, 255, 255, 0.68);

    font-size: 0.58rem;
}


.equation-seven-live-equation strong {
    font-size: 1.55rem;
}


/* ==========================================================
   SIMPLE RESULT
========================================================== */

.equation-seven-balance-result {
    display: grid;

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

    align-items: center;

    gap: 10px;

    margin-bottom: 13px;
}


.equation-seven-balance-result > div {
    min-height: 115px;

    display: flex;
    flex-direction: column;

    align-items: center;
    justify-content: center;

    padding: 16px;

    color:
        var(--color-text-secondary, #334155);

    background: #ffffff;

    border-radius: 16px;

    text-align: center;
}


.equation-seven-balance-result span,
.equation-seven-balance-result strong {
    display: block;
}


.equation-seven-balance-result span {
    margin-bottom: 5px;

    color:
        var(--color-text-muted, #64748b);

    font-size: 0.54rem;
}


.equation-seven-balance-result strong {
    color:
        var(--equation7-primary-dark);

    font-size: 1.15rem;
}


.equation-seven-balance-result > i {
    color: #67e8f9;

    font-style: normal;

    font-weight: 900;
}


.equation-seven-balance-result .result {
    color: #ffffff;

    background:
        var(--equation7-green);
}


.equation-seven-balance-result .result span {
    color:
        rgba(255, 255, 255, 0.68);
}


.equation-seven-balance-result .result strong {
    color: #ffffff;

    font-size: 1.35rem;
}


/* ==========================================================
   BUILDER
========================================================== */

.equation-seven-builder-equation {
    margin-bottom: 13px;

    padding: 18px;

    color:
        var(--color-text-secondary, #334155);

    background: #ffffff;

    border-radius: 16px;

    text-align: center;
}


.equation-seven-builder-equation span,
.equation-seven-builder-equation strong {
    display: block;
}


.equation-seven-builder-equation span {
    margin-bottom: 6px;

    color:
        var(--color-text-muted, #64748b);

    font-size: 0.55rem;

    text-transform: uppercase;
}


.equation-seven-builder-equation strong {
    color:
        var(--equation7-primary-dark);

    font-size: 1.5rem;
}


.equation-seven-builder-steps {
    display: grid;

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

    align-items: center;

    gap: 9px;

    margin-bottom: 13px;
}


.equation-seven-builder-steps > div {
    min-height: 115px;

    display: flex;
    flex-direction: column;

    align-items: center;
    justify-content: center;

    padding: 15px;

    color:
        var(--color-text-secondary, #334155);

    background: #ffffff;

    border-radius: 15px;

    text-align: center;
}


.equation-seven-builder-steps span,
.equation-seven-builder-steps strong {
    display: block;
}


.equation-seven-builder-steps span {
    margin-bottom: 5px;

    color:
        var(--color-text-muted, #64748b);

    font-size: 0.53rem;
}


.equation-seven-builder-steps strong {
    color:
        var(--equation7-primary-dark);
}


.equation-seven-builder-steps > i {
    color: #67e8f9;

    font-style: normal;

    font-weight: 900;
}


.equation-seven-builder-steps .result {
    color: #ffffff;

    background:
        var(--equation7-green);
}


.equation-seven-builder-steps .result span {
    color:
        rgba(255, 255, 255, 0.68);
}


.equation-seven-builder-steps .result strong {
    color: #ffffff;
}


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

.equation-seven-lab-message {
    margin-bottom: 15px;

    padding: 14px;

    color: #bfdbfe;

    background:
        rgba(37, 99, 235, 0.1);

    border:
        1px solid
        rgba(96, 165, 250, 0.2);

    border-radius: 11px;

    text-align: center;

    line-height: 1.6;
}


.equation-seven-lab-actions {
    text-align: center;
}


.equation-seven-reset-button {
    color: #ffffff;

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

    border:
        1px solid
        rgba(255, 255, 255, 0.14);
}


.equation-seven-preset-buttons {
    display: grid;

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

    gap: 8px;

    margin-top: 12px;
}


.equation-seven-preset-buttons button {
    padding: 11px;

    color: #cbd5e1;

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

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

    border-radius: 11px;

    font-weight: 850;
}


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

.equation-seven-practice-section {
    background: #ffffff;
}


.equation-seven-practice-grid {
    display: grid;

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

    gap: 16px;
}


.equation-seven-practice-grid article {
    min-height: 260px;

    padding: 23px;

    background:
        var(--color-background-soft, #f8fafc);

    border:
        1px solid
        var(--color-border, #e2e8f0);

    border-radius: 21px;
}


.equation-seven-practice-grid article > span {
    display: block;

    margin-bottom: 12px;

    color:
        var(--equation7-primary);

    font-size: 0.59rem;

    font-weight: 850;

    text-transform: uppercase;
}


.equation-seven-practice-grid h3 {
    min-height: 76px;

    margin:
        0 0 18px;
}


.equation-seven-practice-grid details {
    padding-top: 14px;

    border-top:
        1px solid
        var(--color-border, #e2e8f0);
}


.equation-seven-practice-grid summary {
    color:
        var(--equation7-primary-dark);

    cursor: pointer;

    font-weight: 800;
}


.equation-seven-practice-grid details p {
    color:
        var(--color-text-muted, #64748b);

    line-height: 1.65;
}


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

.equation-seven-quiz-section {
    background:
        var(--color-background-soft, #f8fafc);
}


.equation-seven-quiz-wrapper {
    max-width: 980px;

    margin-inline: auto;
}


.equation-seven-quiz-heading {
    margin-bottom: 25px;

    text-align: center;
}


.equation-seven-quiz-heading h2 {
    margin:
        8px 0;
}


.equation-seven-quiz-heading p {
    margin: 0;

    color:
        var(--color-text-muted, #64748b);
}


.equation-seven-quiz-card {
    padding: 28px;

    background: #ffffff;

    border:
        1px solid
        var(--color-border, #e2e8f0);

    border-radius: 26px;
}


.equation-seven-quiz-question {
    padding:
        22px 0;

    border-bottom:
        1px solid
        var(--color-border, #e2e8f0);
}


.equation-seven-quiz-question:first-child {
    padding-top: 0;
}


.equation-seven-quiz-question > span {
    display: block;

    margin-bottom: 8px;

    color:
        var(--equation7-primary);

    font-size: 0.58rem;

    font-weight: 900;
}


.equation-seven-quiz-question h3 {
    margin:
        0 0 15px;
}


.equation-seven-quiz-options {
    display: grid;

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

    gap: 8px;
}


.equation-seven-quiz-options button {
    min-height: 46px;

    padding: 10px;

    color:
        var(--color-text-secondary, #334155);

    background:
        var(--color-background-soft, #f8fafc);

    border:
        1px solid
        var(--color-border, #e2e8f0);

    border-radius: 11px;

    font-weight: 750;
}


.equation-seven-quiz-options button.selected {
    color:
        var(--equation7-primary-dark);

    background:
        var(--equation7-primary-soft);

    border-color: #a5b4fc;
}


.equation-seven-quiz-options button.correct {
    color: #166534;

    background: #dcfce7;

    border-color: #86efac;
}


.equation-seven-quiz-options button.incorrect {
    color: #991b1b;

    background: #fee2e2;

    border-color: #fca5a5;
}


.equation-seven-quiz-footer {
    display: flex;

    align-items: center;

    flex-wrap: wrap;

    gap: 10px;

    padding-top: 22px;
}


.equation-seven-quiz-result {
    flex-basis: 100%;

    margin-top: 5px;

    color:
        var(--color-text-secondary, #334155);

    font-weight: 750;
}


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

.equation-seven-summary-section {
    background: #ffffff;
}


.equation-seven-summary-card {
    padding: 35px;

    color: #ffffff;

    background:
        linear-gradient(
            135deg,
            #4338ca,
            #4f46e5 48%,
            #0e7490
        );

    border-radius: 28px;
}


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


.equation-seven-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;
}


.equation-seven-summary-card h2 {
    margin: 0;

    color: #ffffff;
}


.equation-seven-summary-grid {
    display: grid;

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

    gap: 10px;
}


.equation-seven-summary-grid p {
    margin: 0;

    padding: 16px;

    color:
        rgba(255, 255, 255, 0.77);

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

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

    border-radius: 14px;

    line-height: 1.65;
}


.equation-seven-summary-grid strong {
    color: #67e8f9;
}


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

.equation-seven-navigation-section {
    padding:
        40px 0 70px;

    background:
        var(--color-background-soft, #f8fafc);
}


.equation-seven-navigation {
    display: grid;

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

    gap: 12px;
}


.equation-seven-navigation-card {
    display: flex;

    align-items: center;

    gap: 15px;

    padding: 20px;

    color:
        var(--color-text-secondary, #334155);

    background: #ffffff;

    border:
        1px solid
        var(--color-border, #e2e8f0);

    border-radius: 17px;

    text-decoration: none;
}


.equation-seven-navigation-card.next {
    justify-content: flex-end;

    text-align: right;
}


.equation-seven-navigation-card > span {
    color:
        var(--equation7-primary);

    font-size: 1.25rem;

    font-weight: 900;
}


.equation-seven-navigation-card small,
.equation-seven-navigation-card strong {
    display: block;
}


.equation-seven-navigation-card small {
    margin-bottom: 4px;

    color:
        var(--color-text-muted, #64748b);
}


.equation-seven-navigation-card.disabled {
    opacity: 0.58;

    cursor: default;
}


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

@media (max-width: 1120px) {

    .equation-seven-hero-container,
    .equation-seven-two-column {
        grid-template-columns: 1fr;

        gap: 48px;
    }


    .equation-seven-hero-content {
        max-width: 800px;
    }


    .equation-seven-hero-content h1 {
        max-width: 760px;
    }


    .equation-seven-hero-visual,
    .equation-seven-intro-board,
    .equation-seven-balance-card,
    .equation-seven-step-card,
    .equation-seven-check-card {
        width: 100%;

        max-width: 800px;

        margin-inline: auto;
    }


    .equation-seven-parts-grid,
    .equation-seven-solving-grid,
    .equation-seven-strategy-grid {
        grid-template-columns:
            repeat(2, minmax(0, 1fr));
    }

}


@media (max-width: 850px) {

    .equation-seven-example-grid,
    .equation-seven-model-grid,
    .equation-seven-practice-grid {
        grid-template-columns: 1fr;
    }


    .equation-seven-balance-lab,
    .equation-seven-builder-grid {
        grid-template-columns: 1fr;
    }

}


@media (max-width: 680px) {

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


    .equation-seven-hero {
        padding:
            52px 0 64px;
    }


    .equation-seven-hero-content h1 {
        font-size:
            clamp(
                2.4rem,
                11vw,
                3.55rem
            );

        line-height: 1.04;
    }


    .equation-seven-hero-actions {
        flex-direction: column;
    }


    .equation-seven-hero-actions .button {
        width: 100%;
    }


    .equation-seven-hero-meta,
    .equation-seven-objective-list,
    .equation-seven-parts-grid,
    .equation-seven-solving-grid,
    .equation-seven-strategy-grid,
    .equation-seven-summary-grid,
    .equation-seven-navigation {
        grid-template-columns: 1fr;
    }


    .equation-seven-board-equation,
    .equation-seven-intro-board,
    .equation-seven-balance-row {
        grid-template-columns: 1fr;
    }


    .equation-seven-step-card,
    .equation-seven-check-card,
    .equation-seven-balance-result,
    .equation-seven-builder-steps {
        grid-template-columns: 1fr;
    }


    .equation-seven-step-card > i,
    .equation-seven-check-card > i,
    .equation-seven-balance-result > i,
    .equation-seven-builder-steps > i {
        transform: rotate(90deg);
    }


    .equation-seven-preset-buttons,
    .equation-seven-quiz-options {
        grid-template-columns:
            repeat(2, minmax(0, 1fr));
    }


    .equation-seven-navigation-card.next {
        justify-content: flex-start;

        text-align: left;
    }

}


@media (max-width: 450px) {

    .equation-seven-board,
    .equation-seven-lab-card,
    .equation-seven-quiz-card,
    .equation-seven-summary-card {
        padding: 20px;
    }


    .equation-seven-preset-buttons,
    .equation-seven-quiz-options {
        grid-template-columns: 1fr;
    }

}