/* ==========================================================
   BELAJAREDUTECH
   PERSAMAAN GARIS LURUS
   MATEMATIKA SMP KELAS 8
========================================================== */

.line-grade-eight-page {
    --line8-primary: #4f46e5;
    --line8-primary-dark: #3730a3;
    --line8-primary-soft: #eef2ff;

    --line8-secondary: #0891b2;
    --line8-secondary-soft: #ecfeff;

    --line8-green: #0f766e;
    --line8-green-soft: #f0fdfa;

    --line8-red: #b91c1c;
    --line8-red-soft: #fef2f2;

    --line8-text: #0f172a;
    --line8-muted: #64748b;
    --line8-border: #e2e8f0;
    --line8-soft: #f8fafc;
}


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

.line-grade-eight-page .section {
    padding: 82px 0;
}


.line-eight-footer-disabled {
    display: block;
    margin-bottom: 8px;
    color: rgba(255, 255, 255, 0.42);
    cursor: default;
}


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

.line-eight-breadcrumb-section {
    background: #ffffff;
    border-bottom: 1px solid var(--line8-border);
}


.line-eight-breadcrumb {
    min-height: 54px;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    color: var(--line8-muted);
    font-size: 0.76rem;
}


.line-eight-breadcrumb a {
    color: var(--line8-muted);
    text-decoration: none;
}


.line-eight-breadcrumb a:hover {
    color: var(--line8-primary);
}


.line-eight-breadcrumb strong {
    color: #334155;
}


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

.line-eight-hero {
    position: relative;
    overflow: hidden;

    padding: 76px 0 88px;

    background:
        radial-gradient(
            circle at 88% 15%,
            rgba(79, 70, 229, 0.15),
            transparent 30%
        ),
        radial-gradient(
            circle at 10% 88%,
            rgba(8, 145, 178, 0.09),
            transparent 30%
        ),
        linear-gradient(
            180deg,
            #f8faff,
            #ffffff
        );
}


.line-eight-hero-container {
    display: grid;

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

    align-items: center;
    gap: 52px;
}


.line-eight-hero-content,
.line-eight-hero-visual {
    min-width: 0;
}


.line-eight-topic-badge {
    width: fit-content;

    display: flex;
    align-items: center;
    gap: 10px;

    margin-bottom: 14px;

    color: var(--line8-primary-dark);

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


.line-eight-topic-badge span {
    width: 36px;
    height: 36px;

    display: grid;
    place-items: center;

    color: #ffffff;
    background: var(--line8-primary);

    border-radius: 11px;

    font-size: 0.6rem;
}


.line-eight-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;
}


.line-eight-hero-content > p {
    max-width: 650px;

    margin: 0;

    color: var(--line8-muted);

    line-height: 1.8;
}


.line-eight-hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;

    margin-top: 30px;
}


.line-eight-hero-meta {
    max-width: 610px;

    display: grid;

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

    gap: 10px;

    margin-top: 34px;
}


.line-eight-hero-meta > div {
    padding: 16px;

    background: rgba(255, 255, 255, 0.85);

    border: 1px solid var(--line8-border);
    border-radius: 14px;
}


.line-eight-hero-meta strong,
.line-eight-hero-meta span {
    display: block;
}


.line-eight-hero-meta strong {
    margin-bottom: 4px;

    color: var(--line8-primary);

    font-size: 1.02rem;
}


.line-eight-hero-meta span {
    color: var(--line8-muted);
    font-size: 0.68rem;
}


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

.line-eight-hero-visual {
    width: 100%;
    max-width: 620px;
    margin-left: auto;
}


.line-eight-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);
}


.line-eight-board-label {
    display: block;

    margin-bottom: 19px;

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

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


.line-eight-board-equation {
    margin-bottom: 12px;

    padding: 18px;

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

    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 15px;

    text-align: center;
}


.line-eight-board-equation span,
.line-eight-board-equation strong {
    display: block;
}


.line-eight-board-equation span {
    margin-bottom: 6px;

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

    font-size: 0.55rem;
}


.line-eight-board-equation strong {
    color: #67e8f9;
    font-size: 1.4rem;
}


.line-eight-board-points {
    display: grid;

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

    align-items: center;

    gap: 8px;

    margin-bottom: 12px;
}


.line-eight-board-points > div {
    min-height: 110px;

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

    padding: 13px;

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

    border-radius: 14px;

    text-align: center;
}


.line-eight-board-points span,
.line-eight-board-points strong {
    display: block;
}


.line-eight-board-points span {
    margin-bottom: 5px;

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

    font-size: 0.53rem;
}


.line-eight-board-points > i {
    color: #67e8f9;
    font-style: normal;
    font-weight: 900;
}


.line-eight-board-footer {
    display: grid;

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

    gap: 8px;
}


.line-eight-board-footer > div {
    padding: 13px;

    color: #334155;
    background: #ffffff;

    border-radius: 13px;

    text-align: center;
}


.line-eight-board-footer span,
.line-eight-board-footer strong {
    display: block;
}


.line-eight-board-footer span {
    margin-bottom: 4px;

    color: var(--line8-muted);

    font-size: 0.52rem;
}


.line-eight-board-footer strong {
    color: var(--line8-primary-dark);
}


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

.line-eight-progress-section {
    padding: 14px 0;

    background: #ffffff;

    border-top: 1px solid var(--line8-border);
    border-bottom: 1px solid var(--line8-border);
}


.line-eight-progress-list {
    display: flex;
    align-items: center;
    gap: 8px;

    overflow-x: auto;

    padding-bottom: 3px;
}


.line-eight-progress-list a {
    flex-shrink: 0;

    display: flex;
    align-items: center;
    gap: 7px;

    padding: 8px 11px;

    color: var(--line8-muted);
    background: var(--line8-soft);

    border: 1px solid var(--line8-border);
    border-radius: 999px;

    text-decoration: none;

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


.line-eight-progress-list a:hover {
    color: var(--line8-primary-dark);
    background: var(--line8-primary-soft);
    border-color: #c7d2fe;
}


.line-eight-progress-list span {
    color: var(--line8-primary);
    font-size: 0.58rem;
    font-weight: 900;
}


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

.line-eight-two-column {
    display: grid;

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

    align-items: center;

    gap: 70px;
}


.line-eight-section-content h2 {
    margin: 12px 0 18px;

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

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


.line-eight-section-content p {
    color: var(--line8-muted);
    line-height: 1.8;
}


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

.line-eight-objective-section {
    background: #ffffff;
}


.line-eight-objective-list {
    display: grid;

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

    gap: 10px;
}


.line-eight-objective-list article {
    min-height: 145px;

    padding: 18px;

    background: var(--line8-soft);

    border: 1px solid var(--line8-border);
    border-radius: 17px;
}


.line-eight-objective-list article > span {
    width: 36px;
    height: 36px;

    display: grid;
    place-items: center;

    margin-bottom: 10px;

    color: #ffffff;
    background: var(--line8-primary);

    border-radius: 50%;

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


.line-eight-objective-list p {
    margin: 0;

    color: var(--line8-muted);

    line-height: 1.65;
}


/* ==========================================================
   COORDINATE
========================================================== */

.line-eight-coordinate-section {
    background: var(--line8-soft);
}


.line-eight-coordinate-card {
    padding: 25px;

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

    border-radius: 25px;
}


.line-eight-coordinate-grid {
    position: relative;

    width: 100%;
    max-width: 520px;
    aspect-ratio: 1 / 1;

    margin-inline: auto;

    overflow: hidden;

    background:
        linear-gradient(
            rgba(255, 255, 255, 0.08) 1px,
            transparent 1px
        ),
        linear-gradient(
            90deg,
            rgba(255, 255, 255, 0.08) 1px,
            transparent 1px
        );

    background-size:
        10% 10%;

    border:
        1px solid
        rgba(255, 255, 255, 0.12);

    border-radius: 18px;
}


.line-eight-coordinate-grid .axis-x,
.line-eight-coordinate-grid .axis-y {
    position: absolute;
    display: block;
    background: rgba(255, 255, 255, 0.7);
}


.line-eight-coordinate-grid .axis-x {
    left: 0;
    top: 50%;

    width: 100%;
    height: 2px;
}


.line-eight-coordinate-grid .axis-y {
    top: 0;
    left: 50%;

    width: 2px;
    height: 100%;
}


.line-eight-coordinate-grid .point {
    position: absolute;

    display: flex;
    align-items: center;
    gap: 7px;

    color: #ffffff;

    font-size: 0.68rem;
}


.line-eight-coordinate-grid .point i {
    width: 13px;
    height: 13px;

    flex-shrink: 0;

    background: #67e8f9;

    border: 3px solid #ffffff;
    border-radius: 50%;
}


.line-eight-coordinate-grid .point-a {
    left: 68%;
    top: 16%;
}


.line-eight-coordinate-grid .point-b {
    left: 24%;
    top: 34%;
}


.line-eight-coordinate-grid .point-c {
    left: 58%;
    top: 68%;
}


.line-eight-coordinate-grid .label-x,
.line-eight-coordinate-grid .label-y {
    position: absolute;

    color: #67e8f9;

    font-weight: 900;
}


.line-eight-coordinate-grid .label-x {
    right: 12px;
    top: calc(50% + 8px);
}


.line-eight-coordinate-grid .label-y {
    top: 10px;
    left: calc(50% + 8px);
}


/* ==========================================================
   SLOPE
========================================================== */

.line-eight-slope-section {
    background: #ffffff;
}


.line-eight-slope-grid {
    display: grid;

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

    gap: 16px;
}


.line-eight-slope-grid article {
    min-height: 300px;

    padding: 23px;

    background: var(--line8-soft);

    border: 1px solid var(--line8-border);
    border-radius: 21px;

    text-align: center;
}


.line-eight-slope-grid article > span {
    display: block;

    margin-bottom: 15px;

    color: var(--line8-primary);

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


.line-eight-slope-icon {
    position: relative;

    width: 180px;
    height: 110px;

    margin: 0 auto 18px;

    overflow: hidden;

    background: #ffffff;

    border: 1px solid var(--line8-border);
    border-radius: 14px;
}


.line-eight-slope-icon::before {
    content: "";

    position: absolute;

    left: 20px;
    bottom: 20px;

    width: calc(100% - 40px);
    height: 2px;

    background: #cbd5e1;
}


.line-eight-slope-icon i {
    position: absolute;

    left: 24px;
    top: 52px;

    width: 130px;
    height: 4px;

    background: var(--line8-primary);

    border-radius: 999px;

    transform-origin: center;
}


.line-eight-slope-icon.positive i {
    transform: rotate(-25deg);
}


.line-eight-slope-icon.zero i {
    transform: rotate(0deg);
}


.line-eight-slope-icon.negative i {
    transform: rotate(25deg);
}


.line-eight-slope-grid article > strong {
    display: block;

    margin-bottom: 8px;

    color: var(--line8-primary-dark);

    font-size: 1.2rem;
}


.line-eight-slope-grid p {
    margin: 0;

    color: var(--line8-muted);

    line-height: 1.65;
}


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

.line-eight-formula-section {
    background: var(--line8-soft);
}


.line-eight-formula-card {
    padding: 30px;

    color: #ffffff;

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

    border-radius: 25px;
}


.line-eight-formula-card > span {
    display: block;

    margin-bottom: 12px;

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

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


.line-eight-formula-card > strong {
    display: block;

    margin-bottom: 22px;

    color: #67e8f9;

    font-size: clamp(
        1.25rem,
        2.7vw,
        2rem
    );

    text-align: center;
}


.line-eight-formula-card > div {
    display: grid;

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

    gap: 8px;
}


.line-eight-formula-card p {
    margin: 0;

    padding: 13px;

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

    border-radius: 12px;

    text-align: center;
}


.line-eight-formula-card > small {
    display: block;

    margin-top: 15px;

    color: #fef3c7;

    text-align: center;
}


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

.line-eight-example-section {
    background: #ffffff;
}


.line-eight-example-flow {
    display: grid;

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

    align-items: center;

    gap: 9px;
}


.line-eight-example-flow > div {
    min-height: 145px;

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

    padding: 17px;

    background: var(--line8-soft);

    border: 1px solid var(--line8-border);
    border-radius: 17px;

    text-align: center;
}


.line-eight-example-flow span,
.line-eight-example-flow strong {
    display: block;
}


.line-eight-example-flow span {
    margin-bottom: 6px;

    color: var(--line8-muted);

    font-size: 0.55rem;
}


.line-eight-example-flow strong {
    color: var(--line8-primary-dark);
}


.line-eight-example-flow > i {
    color: var(--line8-secondary);

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


.line-eight-example-flow .result {
    color: #ffffff;
    background: var(--line8-green);
    border-color: var(--line8-green);
}


.line-eight-example-flow .result span,
.line-eight-example-flow .result strong {
    color: #ffffff;
}


/* ==========================================================
   EQUATION
========================================================== */

.line-eight-equation-section {
    background: var(--line8-soft);
}


.line-eight-equation-card {
    padding: 30px;

    color: #ffffff;

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

    border-radius: 25px;
}


.line-eight-equation-card > strong {
    display: block;

    margin-bottom: 20px;

    color: #67e8f9;

    font-size: clamp(
        1.8rem,
        4vw,
        2.7rem
    );

    text-align: center;
}


.line-eight-equation-card > div {
    display: grid;

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

    gap: 10px;
}


.line-eight-equation-card article {
    padding: 18px;

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

    border-radius: 14px;
}


.line-eight-equation-card article > span {
    width: 42px;
    height: 42px;

    display: grid;
    place-items: center;

    margin-bottom: 10px;

    color: #312e81;
    background: #67e8f9;

    border-radius: 12px;

    font-weight: 900;
}


.line-eight-equation-card article > strong {
    display: block;

    margin-bottom: 7px;
}


.line-eight-equation-card article p {
    margin: 0;

    color: rgba(255, 255, 255, 0.65);

    line-height: 1.6;
}


/* ==========================================================
   READ EQUATION
========================================================== */

.line-eight-read-section {
    background: #ffffff;
}


.line-eight-read-grid {
    display: grid;

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

    gap: 16px;
}


.line-eight-read-grid article {
    min-height: 275px;

    padding: 23px;

    background: var(--line8-soft);

    border: 1px solid var(--line8-border);
    border-radius: 21px;
}


.line-eight-read-grid article > span {
    display: block;

    margin-bottom: 18px;

    color: var(--line8-primary-dark);

    font-size: 1.2rem;
    font-weight: 900;

    text-align: center;
}


.line-eight-read-grid article > div {
    margin-top: 8px;

    padding: 14px;

    background: #ffffff;

    border-radius: 12px;
}


.line-eight-read-grid p,
.line-eight-read-grid strong {
    display: block;

    margin: 0;

    text-align: center;
}


.line-eight-read-grid p {
    margin-bottom: 5px;

    color: var(--line8-muted);

    font-size: 0.58rem;
}


.line-eight-read-grid strong {
    color: var(--line8-primary);
}


/* ==========================================================
   VALUE TABLE
========================================================== */

.line-eight-table-section {
    background: var(--line8-soft);
}


.line-eight-value-table {
    overflow: hidden;

    background: #ffffff;

    border: 1px solid var(--line8-border);
    border-radius: 18px;
}


.line-eight-value-table > div {
    display: grid;

    grid-template-columns:
        0.65fr 1fr 1fr;

    min-height: 62px;

    align-items: center;

    border-bottom: 1px solid var(--line8-border);
}


.line-eight-value-table > div:last-child {
    border-bottom: none;
}


.line-eight-value-table .header {
    color: #ffffff;
    background: var(--line8-primary);
}


.line-eight-value-table span,
.line-eight-value-table strong {
    padding: 11px 15px;
    text-align: center;
}


.line-eight-value-table div:not(.header) strong {
    color: var(--line8-green);
}


/* ==========================================================
   INTERCEPT
========================================================== */

.line-eight-intercept-section {
    background: #ffffff;
}


.line-eight-intercept-grid {
    display: grid;

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

    align-items: center;

    gap: 9px;
}


.line-eight-intercept-grid article {
    min-height: 140px;

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

    padding: 16px;

    background: var(--line8-soft);

    border: 1px solid var(--line8-border);
    border-radius: 17px;

    text-align: center;
}


.line-eight-intercept-grid span,
.line-eight-intercept-grid strong {
    display: block;
}


.line-eight-intercept-grid span {
    margin-bottom: 6px;

    color: var(--line8-muted);

    font-size: 0.55rem;
}


.line-eight-intercept-grid strong {
    color: var(--line8-primary-dark);
}


.line-eight-intercept-grid > i {
    color: var(--line8-secondary);

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


.line-eight-intercept-grid .result {
    color: #ffffff;
    background: var(--line8-green);
    border-color: var(--line8-green);
}


.line-eight-intercept-grid .result span,
.line-eight-intercept-grid .result strong {
    color: #ffffff;
}


/* ==========================================================
   CONNECTION
========================================================== */

.line-eight-connection-section {
    background: var(--line8-soft);
}


.line-eight-connection-flow {
    display: grid;

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

    align-items: center;

    gap: 10px;
}


.line-eight-connection-flow > div {
    min-height: 150px;

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

    padding: 18px;

    background: #ffffff;

    border: 1px solid var(--line8-border);
    border-radius: 17px;

    text-align: center;
}


.line-eight-connection-flow span,
.line-eight-connection-flow strong,
.line-eight-connection-flow small {
    display: block;
}


.line-eight-connection-flow span {
    margin-bottom: 5px;

    color: var(--line8-primary);

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


.line-eight-connection-flow strong {
    margin-bottom: 5px;
}


.line-eight-connection-flow small {
    color: var(--line8-muted);
}


.line-eight-connection-flow > i {
    color: var(--line8-secondary);

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


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

.line-eight-strategy-section {
    background: #ffffff;
}


.line-eight-strategy-grid {
    display: grid;

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

    gap: 14px;
}


.line-eight-strategy-grid article {
    min-height: 230px;

    padding: 22px;

    background: var(--line8-soft);

    border: 1px solid var(--line8-border);
    border-radius: 21px;
}


.line-eight-strategy-grid article > span {
    width: 40px;
    height: 40px;

    display: grid;
    place-items: center;

    margin-bottom: 15px;

    color: #ffffff;
    background: var(--line8-primary);

    border-radius: 50%;

    font-size: 0.56rem;
    font-weight: 900;
}


.line-eight-strategy-grid h3 {
    margin: 0 0 8px;
}


.line-eight-strategy-grid p {
    margin: 0;

    color: var(--line8-muted);

    line-height: 1.65;
}


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

.line-eight-lab-section {
    color: #ffffff;
    background: #0f172a;
}


.line-eight-lab-section .section-eyebrow {
    color: #93c5fd;
}


.line-eight-lab-section .section-header p {
    color: #94a3b8;
}


.line-eight-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;
}


.line-eight-lab-heading {
    margin-bottom: 24px;

    text-align: center;
}


.line-eight-lab-heading > span {
    display: block;

    margin-bottom: 5px;

    color: #93c5fd;

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


.line-eight-lab-heading h3 {
    margin: 0 0 7px;

    color: #ffffff;
}


.line-eight-lab-heading p {
    margin: 0;

    color: #94a3b8;
}


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

.line-eight-line-lab {
    display: grid;

    grid-template-columns:
        0.72fr 1.28fr;

    gap: 12px;

    margin-bottom: 14px;
}


.line-eight-line-controls {
    display: flex;
    flex-direction: column;
    gap: 10px;
}


.line-eight-line-controls > div:not(.line-eight-equation-live):not(.line-eight-line-presets) {
    padding: 17px;

    color: #334155;
    background: #ffffff;

    border-radius: 15px;
}


.line-eight-line-controls label {
    display: block;

    margin-bottom: 10px;

    color: var(--line8-muted);

    font-size: 0.54rem;
    font-weight: 850;
    text-transform: uppercase;
}


.line-eight-line-controls input {
    width: 100%;

    accent-color: var(--line8-primary);
}


.line-eight-line-controls > div > strong {
    display: block;

    margin-top: 8px;

    color: var(--line8-primary);

    text-align: center;
}


.line-eight-equation-live {
    padding: 17px;

    color: #ffffff;

    background: var(--line8-primary);

    border-radius: 15px;

    text-align: center;
}


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


.line-eight-equation-live span {
    margin-bottom: 5px;

    color: rgba(255, 255, 255, 0.65);

    font-size: 0.52rem;
    text-transform: uppercase;
}


.line-eight-equation-live strong {
    font-size: 1.2rem;
}


.line-eight-line-presets {
    display: grid;

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

    gap: 7px;
}


.line-eight-line-presets button {
    min-height: 44px;

    padding: 9px;

    color: #cbd5e1;

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

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

    font-weight: 750;
}


/* ==========================================================
   GRAPH
========================================================== */

.line-eight-graph-card {
    padding: 18px;

    color: #334155;
    background: #ffffff;

    border-radius: 18px;
}


.line-eight-graph-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;

    gap: 12px;

    margin-bottom: 12px;
}


.line-eight-graph-heading span {
    color: var(--line8-muted);

    font-size: 0.54rem;
    text-transform: uppercase;
}


.line-eight-graph-heading strong {
    color: var(--line8-primary-dark);
}


.line-eight-graph {
    display: block;

    width: 100%;
    max-width: 480px;
    aspect-ratio: 1 / 1;

    margin-inline: auto;

    background: #f8fafc;

    border: 1px solid var(--line8-border);
    border-radius: 15px;
}


.line-eight-graph .graph-grid line {
    stroke: #e2e8f0;
    stroke-width: 1;
}


.line-eight-graph .axis {
    stroke: #64748b;
    stroke-width: 2;
}


.line-eight-graph .function-line {
    stroke: #4f46e5;
    stroke-width: 4;
    stroke-linecap: round;
}


.line-eight-graph .intercept-point {
    fill: #0f766e;
    stroke: #ffffff;
    stroke-width: 3;
}


.line-eight-graph .graph-label {
    fill: #334155;
    font-size: 13px;
    font-weight: 700;
}


.line-eight-graph-message {
    margin: 12px 0 0;

    color: var(--line8-muted);

    line-height: 1.6;

    text-align: center;
}


/* ==========================================================
   LIVE TABLE
========================================================== */

.line-eight-live-table {
    overflow: hidden;

    color: #334155;
    background: #ffffff;

    border-radius: 16px;
}


.line-eight-live-table > div {
    display: grid;

    grid-template-columns:
        0.6fr 0.8fr 1fr;

    min-height: 56px;

    align-items: center;

    border-bottom: 1px solid var(--line8-border);
}


.line-eight-live-table > div:last-child {
    border-bottom: none;
}


.line-eight-live-table .header {
    color: #ffffff;
    background: var(--line8-primary);
}


.line-eight-live-table span,
.line-eight-live-table strong {
    padding: 10px;
    text-align: center;
}


.line-eight-live-table div:not(.header) strong {
    color: var(--line8-green);
}


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

.line-eight-point-controls {
    display: grid;

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

    gap: 10px;

    margin-bottom: 13px;
}


.line-eight-point-control {
    padding: 20px;

    color: #334155;
    background: #ffffff;

    border-radius: 17px;
}


.line-eight-point-control > span {
    display: block;

    margin-bottom: 15px;

    color: var(--line8-primary);

    font-size: 0.6rem;
    font-weight: 900;
    text-transform: uppercase;
}


.line-eight-point-control label {
    display: block;

    margin: 12px 0 5px;

    color: var(--line8-muted);

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


.line-eight-point-control input {
    width: 100%;

    accent-color: var(--line8-primary);
}


.line-eight-point-control > strong {
    display: block;

    margin-top: 4px;

    color: var(--line8-primary-dark);

    text-align: center;
}


.line-eight-point-control > div {
    margin-top: 16px;

    padding: 13px;

    background: var(--line8-primary-soft);

    border-radius: 11px;

    text-align: center;
}


.line-eight-point-control small,
.line-eight-point-control div strong {
    display: block;
}


.line-eight-point-control small {
    margin-bottom: 4px;

    color: var(--line8-muted);
}


.line-eight-point-control div strong {
    color: var(--line8-primary-dark);
}


/* ==========================================================
   SLOPE CALCULATION
========================================================== */

.line-eight-slope-calculation {
    display: grid;

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

    gap: 8px;

    margin-bottom: 13px;
}


.line-eight-slope-calculation > 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;
}


.line-eight-slope-calculation span,
.line-eight-slope-calculation strong {
    display: block;
}


.line-eight-slope-calculation span {
    margin-bottom: 5px;

    color: var(--line8-muted);

    font-size: 0.5rem;
    text-transform: uppercase;
}


.line-eight-slope-calculation strong {
    color: var(--line8-primary-dark);
}


.line-eight-slope-calculation .result {
    color: #ffffff;
    background: var(--line8-green);
}


.line-eight-slope-calculation .result span,
.line-eight-slope-calculation .result strong {
    color: #ffffff;
}


.line-eight-lab-message {
    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;
}


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

.line-eight-practice-section {
    background: #ffffff;
}


.line-eight-practice-grid {
    display: grid;

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

    gap: 16px;
}


.line-eight-practice-grid article {
    min-height: 290px;

    padding: 23px;

    background: var(--line8-soft);

    border: 1px solid var(--line8-border);
    border-radius: 21px;
}


.line-eight-practice-grid article > span {
    display: block;

    margin-bottom: 12px;

    color: var(--line8-primary);

    font-size: 0.59rem;
    font-weight: 850;
    text-transform: uppercase;
}


.line-eight-practice-grid h3 {
    min-height: 100px;

    margin: 0 0 18px;
}


.line-eight-practice-grid details {
    padding-top: 14px;

    border-top: 1px solid var(--line8-border);
}


.line-eight-practice-grid summary {
    color: var(--line8-primary-dark);

    cursor: pointer;

    font-weight: 800;
}


.line-eight-practice-grid details p {
    color: var(--line8-muted);
    line-height: 1.65;
}


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

.line-eight-quiz-section {
    background: var(--line8-soft);
}


.line-eight-quiz-wrapper {
    max-width: 980px;
    margin-inline: auto;
}


.line-eight-quiz-heading {
    margin-bottom: 25px;
    text-align: center;
}


.line-eight-quiz-heading h2 {
    margin: 8px 0;
}


.line-eight-quiz-heading p {
    margin: 0;
    color: var(--line8-muted);
}


.line-eight-quiz-card {
    padding: 28px;

    background: #ffffff;

    border: 1px solid var(--line8-border);
    border-radius: 26px;
}


.line-eight-quiz-question {
    padding: 22px 0;

    border-bottom: 1px solid var(--line8-border);
}


.line-eight-quiz-question:first-child {
    padding-top: 0;
}


.line-eight-quiz-question > span {
    display: block;

    margin-bottom: 8px;

    color: var(--line8-primary);

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


.line-eight-quiz-question h3 {
    margin: 0 0 15px;
}


.line-eight-quiz-options {
    display: grid;

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

    gap: 8px;
}


.line-eight-quiz-options button {
    min-height: 48px;

    padding: 10px;

    color: #334155;
    background: var(--line8-soft);

    border: 1px solid var(--line8-border);
    border-radius: 11px;

    font-weight: 750;
}


.line-eight-quiz-options button.selected {
    color: var(--line8-primary-dark);
    background: var(--line8-primary-soft);
    border-color: #a5b4fc;
}


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


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


.line-eight-quiz-footer {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;

    padding-top: 22px;
}


.line-eight-quiz-result {
    flex-basis: 100%;

    margin-top: 5px;

    color: #334155;

    font-weight: 750;
}


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

.line-eight-summary-section {
    background: #ffffff;
}


.line-eight-summary-card {
    padding: 35px;

    color: #ffffff;

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

    border-radius: 28px;
}


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


.line-eight-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;
}


.line-eight-summary-card h2 {
    margin: 0;
    color: #ffffff;
}


.line-eight-summary-grid {
    display: grid;

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

    gap: 10px;
}


.line-eight-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;
}


.line-eight-summary-grid strong {
    color: #67e8f9;
}


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

.line-eight-navigation-section {
    padding: 40px 0 70px;

    background: var(--line8-soft);
}


.line-eight-navigation {
    display: grid;

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

    gap: 12px;
}


.line-eight-navigation-card {
    display: flex;
    align-items: center;
    gap: 15px;

    padding: 20px;

    color: #334155;
    background: #ffffff;

    border: 1px solid var(--line8-border);
    border-radius: 17px;

    text-decoration: none;
}


.line-eight-navigation-card.next {
    justify-content: flex-end;
    text-align: right;
}


.line-eight-navigation-card > span {
    color: var(--line8-primary);

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


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


.line-eight-navigation-card small {
    margin-bottom: 4px;
    color: var(--line8-muted);
}


.line-eight-navigation-card div > span {
    margin-top: 4px;

    color: var(--line8-muted);

    font-size: 0.62rem;
}


.line-eight-navigation-card.disabled {
    opacity: 0.58;
    cursor: default;
}


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

@media (max-width: 1120px) {

    .line-eight-hero-container,
    .line-eight-two-column {
        grid-template-columns: 1fr;
        gap: 48px;
    }


    .line-eight-hero-content {
        max-width: 800px;
    }


    .line-eight-hero-visual,
    .line-eight-coordinate-card,
    .line-eight-formula-card,
    .line-eight-equation-card {
        width: 100%;
        max-width: 800px;

        margin-inline: auto;
    }


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

}


@media (max-width: 860px) {

    .line-eight-slope-grid,
    .line-eight-read-grid,
    .line-eight-practice-grid {
        grid-template-columns: 1fr;
    }


    .line-eight-line-lab {
        grid-template-columns: 1fr;
    }


    .line-eight-point-controls {
        grid-template-columns: 1fr;
    }


    .line-eight-slope-calculation {
        grid-template-columns:
            repeat(2, minmax(0, 1fr));
    }

}


@media (max-width: 680px) {

    .line-grade-eight-page .section {
        padding: 62px 0;
    }


    .line-eight-hero {
        padding: 52px 0 64px;
    }


    .line-eight-hero-content h1 {
        font-size: clamp(
            2.4rem,
            10.8vw,
            3.6rem
        );

        line-height: 1.04;
    }


    .line-eight-hero-actions {
        flex-direction: column;
    }


    .line-eight-hero-actions .button {
        width: 100%;
    }


    .line-eight-hero-meta,
    .line-eight-objective-list,
    .line-eight-strategy-grid,
    .line-eight-summary-grid,
    .line-eight-navigation {
        grid-template-columns: 1fr;
    }


    .line-eight-board-points {
        grid-template-columns: 1fr;
    }


    .line-eight-board-points > i {
        transform: rotate(90deg);
        justify-self: center;
    }


    .line-eight-board-footer {
        grid-template-columns: 1fr;
    }


    .line-eight-formula-card > div,
    .line-eight-equation-card > div {
        grid-template-columns: 1fr;
    }


    .line-eight-example-flow,
    .line-eight-intercept-grid,
    .line-eight-connection-flow {
        grid-template-columns: 1fr;
    }


    .line-eight-example-flow > i,
    .line-eight-intercept-grid > i,
    .line-eight-connection-flow > i {
        transform: rotate(90deg);
        justify-self: center;
    }


    .line-eight-line-presets,
    .line-eight-slope-calculation,
    .line-eight-quiz-options {
        grid-template-columns: 1fr;
    }


    .line-eight-navigation-card.next {
        justify-content: flex-start;
        text-align: left;
    }

}


@media (max-width: 450px) {

    .line-eight-board,
    .line-eight-lab-card,
    .line-eight-quiz-card,
    .line-eight-summary-card {
        padding: 20px;
    }


    .line-eight-coordinate-grid .point {
        font-size: 0.55rem;
    }


    .line-eight-live-table > div {
        grid-template-columns:
            0.55fr 0.65fr 1fr;
    }

}