/* ==========================================================
   BELAJAREDUTECH
   KOMBINATORIK
   MATEMATIKA SMA / SMK KELAS 12
========================================================== */

.combinatorics-grade-twelve-page {
    --comb12-primary: #7c3aed;
    --comb12-primary-dark: #6d28d9;
    --comb12-primary-soft: #f5f3ff;

    --comb12-secondary: #ea580c;
    --comb12-secondary-soft: #fff7ed;

    --comb12-blue: #2563eb;
    --comb12-green: #0f766e;
    --comb12-green-soft: #f0fdfa;

    --comb12-text: #0f172a;
    --comb12-muted: #64748b;
    --comb12-border: #e2e8f0;
    --comb12-soft: #f8fafc;
}


.combinatorics-grade-twelve-page .section {
    padding: 82px 0;
}


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

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

    cursor: default;
}


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

.combinatorics-breadcrumb-section {
    background: #ffffff;

    border-bottom:
        1px solid
        var(--comb12-border);
}


.combinatorics-breadcrumb {
    min-height: 54px;

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

    gap: 8px;

    color: var(--comb12-muted);

    font-size: 0.76rem;
}


.combinatorics-breadcrumb a {
    color: var(--comb12-muted);

    text-decoration: none;
}


.combinatorics-breadcrumb a:hover {
    color: var(--comb12-primary);
}


.combinatorics-breadcrumb strong {
    color: #334155;
}


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

.combinatorics-hero {
    overflow: hidden;

    padding: 76px 0 88px;

    background:
        radial-gradient(
            circle at 88% 15%,
            rgba(124, 58, 237, 0.15),
            transparent 30%
        ),
        radial-gradient(
            circle at 10% 88%,
            rgba(234, 88, 12, 0.09),
            transparent 31%
        ),
        linear-gradient(
            180deg,
            #fbfaff,
            #ffffff
        );
}


.combinatorics-hero-container {
    display: grid;

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

    align-items: center;

    gap: 52px;
}


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


.combinatorics-topic-badge {
    width: fit-content;

    display: flex;
    align-items: center;

    gap: 10px;

    margin-bottom: 14px;

    color: var(--comb12-primary-dark);

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


.combinatorics-topic-badge span {
    width: 40px;
    height: 40px;

    display: grid;
    place-items: center;

    color: #ffffff;

    background:
        linear-gradient(
            135deg,
            var(--comb12-primary),
            var(--comb12-secondary)
        );

    border-radius: 12px;

    font-size: 0.62rem;
}


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

    font-size:
        clamp(
            3rem,
            5vw,
            4.8rem
        );

    line-height: 1.01;
    letter-spacing: -0.055em;
}


.combinatorics-hero-content > p {
    max-width: 700px;

    margin: 0;

    color: var(--comb12-muted);

    line-height: 1.8;
}


.combinatorics-hero-actions {
    display: flex;
    flex-wrap: wrap;

    gap: 12px;

    margin-top: 30px;
}


.combinatorics-hero-meta {
    max-width: 700px;

    display: grid;

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

    gap: 10px;

    margin-top: 34px;
}


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

    background:
        rgba(255, 255, 255, 0.9);

    border:
        1px solid
        var(--comb12-border);

    border-radius: 14px;
}


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


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

    color: var(--comb12-primary-dark);

    font-size: 1.02rem;
}


.combinatorics-hero-meta span {
    color: var(--comb12-muted);

    font-size: 0.65rem;
}


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

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

    margin-left: auto;
}


.combinatorics-board {
    padding: 28px;

    color: #ffffff;

    background:
        linear-gradient(
            145deg,
            #3b0764,
            #7c3aed 50%,
            #c2410c
        );

    border-radius: 30px;

    box-shadow:
        0 32px 85px
        rgba(109, 40, 217, 0.23);
}


.combinatorics-board-label {
    display: block;

    margin-bottom: 17px;

    color:
        rgba(255, 255, 255, 0.66);

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


.combinatorics-board-tree {
    padding: 18px;

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

    border-radius: 18px;

    text-align: center;
}


.combinatorics-board-tree .root {
    max-width: 250px;

    margin-inline: auto;
    padding: 14px;

    background:
        rgba(255, 255, 255, 0.11);

    border-radius: 13px;
}


.combinatorics-board-tree span,
.combinatorics-board-tree strong,
.combinatorics-board-tree small {
    display: block;
}


.combinatorics-board-tree span {
    margin-bottom: 5px;

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

    font-size: 0.5rem;
}


.combinatorics-board-tree strong {
    color: #ffffff;
}


.combinatorics-board-tree > i {
    display: block;

    margin: 9px 0;

    color: #fde68a;

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


.combinatorics-board-tree .branches {
    display: grid;

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

    gap: 9px;
}


.combinatorics-board-tree .branches article {
    padding: 15px;

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

    border-radius: 13px;
}


.combinatorics-board-tree .branches strong {
    margin-bottom: 5px;

    color: #fde68a;
}


.combinatorics-board-tree small {
    color:
        rgba(255, 255, 255, 0.75);
}


.combinatorics-board-formulas {
    display: grid;

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

    gap: 8px;

    margin-top: 12px;
}


.combinatorics-board-formulas > div {
    padding: 13px;

    color: #334155;
    background: #ffffff;

    border-radius: 12px;

    text-align: center;
}


.combinatorics-board-formulas span,
.combinatorics-board-formulas strong {
    display: block;
}


.combinatorics-board-formulas span {
    margin-bottom: 5px;

    color: var(--comb12-muted);

    font-size: 0.48rem;
}


.combinatorics-board-formulas strong {
    color: var(--comb12-primary-dark);

    font-size: 0.7rem;
}


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

.combinatorics-progress-section {
    padding: 14px 0;

    background: #ffffff;

    border-top:
        1px solid
        var(--comb12-border);

    border-bottom:
        1px solid
        var(--comb12-border);
}


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

    gap: 8px;

    overflow-x: auto;

    padding-bottom: 3px;
}


.combinatorics-progress-list a {
    flex-shrink: 0;

    display: flex;
    align-items: center;

    gap: 7px;

    padding: 8px 11px;

    color: var(--comb12-muted);
    background: var(--comb12-soft);

    border:
        1px solid
        var(--comb12-border);

    border-radius: 999px;

    text-decoration: none;

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


.combinatorics-progress-list a:hover {
    color: var(--comb12-primary-dark);
    background: var(--comb12-primary-soft);

    border-color: #c4b5fd;
}


.combinatorics-progress-list span {
    color: var(--comb12-primary);

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


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

.combinatorics-two-column {
    display: grid;

    grid-template-columns:
        minmax(0, 0.82fr)
        minmax(500px, 1.18fr);

    align-items: center;

    gap: 70px;
}


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

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

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


.combinatorics-section-content p {
    color: var(--comb12-muted);

    line-height: 1.8;
}


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

.combinatorics-objective-section {
    background: #ffffff;
}


.combinatorics-objective-list {
    display: grid;

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

    gap: 10px;
}


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

    padding: 18px;

    background: var(--comb12-soft);

    border:
        1px solid
        var(--comb12-border);

    border-radius: 17px;
}


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

    display: grid;
    place-items: center;

    margin-bottom: 12px;

    color: #ffffff;
    background: var(--comb12-primary);

    border-radius: 50%;

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


.combinatorics-objective-list p {
    margin: 0;

    color: var(--comb12-muted);

    line-height: 1.65;
}


/* ==========================================================
   COUNTING
========================================================== */

.combinatorics-counting-section {
    background: var(--comb12-soft);
}


.combinatorics-counting-grid,
.combinatorics-factorial-grid,
.combinatorics-probability-grid {
    display: grid;

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

    gap: 15px;
}


.combinatorics-counting-grid article,
.combinatorics-factorial-grid article,
.combinatorics-probability-grid article {
    min-height: 250px;

    padding: 22px;

    background: #ffffff;

    border:
        1px solid
        var(--comb12-border);

    border-radius: 20px;
}


.combinatorics-counting-grid span,
.combinatorics-factorial-grid span,
.combinatorics-probability-grid article > span {
    display: block;

    margin-bottom: 10px;

    color: var(--comb12-primary);

    font-size: 0.56rem;
    font-weight: 850;
    text-transform: uppercase;
}


.combinatorics-counting-grid strong,
.combinatorics-factorial-grid strong {
    display: block;

    margin-bottom: 11px;

    color: var(--comb12-primary-dark);

    font-size: 1.12rem;
}


.combinatorics-counting-grid p,
.combinatorics-factorial-grid p,
.combinatorics-probability-grid p {
    color: var(--comb12-muted);

    line-height: 1.67;
}


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

.combinatorics-counting-example {
    background: #ffffff;
}


.combinatorics-counting-example-card {
    display: grid;

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

    align-items: center;

    gap: 9px;

    padding: 25px;

    color: #ffffff;

    background:
        linear-gradient(
            145deg,
            #4c1d95,
            #7c3aed
        );

    border-radius: 24px;
}


.combinatorics-counting-example-card > div {
    min-height: 140px;

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

    padding: 13px;

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

    border-radius: 12px;

    text-align: center;
}


.combinatorics-counting-example-card span,
.combinatorics-counting-example-card strong {
    display: block;
}


.combinatorics-counting-example-card span {
    margin-bottom: 6px;

    color: #ddd6fe;

    font-size: 0.52rem;
}


.combinatorics-counting-example-card strong {
    color: #ffffff;
}


.combinatorics-counting-example-card > i {
    color: #fde68a;

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


.combinatorics-counting-example-card .result {
    background: var(--comb12-green);
}


/* ==========================================================
   FACTORIAL
========================================================== */

.combinatorics-factorial-section {
    background: var(--comb12-soft);
}


.combinatorics-factorial-formula,
.combinatorics-main-formula,
.combinatorics-probability-formula {
    max-width: 850px;

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

    color: #ffffff;

    background:
        linear-gradient(
            135deg,
            var(--comb12-primary),
            var(--comb12-blue)
        );

    border-radius: 16px;

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

    text-align: center;

    line-height: 1.6;
}


/* ==========================================================
   PERMUTATION
========================================================== */

.combinatorics-permutation-section {
    background: #ffffff;
}


.combinatorics-permutation-grid,
.combinatorics-compound-grid {
    display: grid;

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

    gap: 14px;
}


.combinatorics-permutation-grid article,
.combinatorics-compound-grid article {
    min-height: 260px;

    padding: 21px;

    background: var(--comb12-soft);

    border:
        1px solid
        var(--comb12-border);

    border-radius: 19px;
}


.combinatorics-permutation-grid span,
.combinatorics-compound-grid span {
    display: block;

    margin-bottom: 10px;

    color: var(--comb12-primary);

    font-size: 0.55rem;
    font-weight: 850;
    text-transform: uppercase;
}


.combinatorics-permutation-grid strong,
.combinatorics-compound-grid strong {
    display: block;

    margin-bottom: 11px;

    color: var(--comb12-primary-dark);

    line-height: 1.55;
}


.combinatorics-permutation-grid p,
.combinatorics-compound-grid p {
    color: var(--comb12-muted);

    line-height: 1.65;
}


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

.combinatorics-permutation-example {
    background: var(--comb12-soft);
}


.combinatorics-calculation-card {
    padding: 26px;

    color: #ffffff;

    background:
        linear-gradient(
            145deg,
            #312e81,
            #4f46e5
        );

    border-radius: 24px;
}


.combinatorics-calculation-card > span {
    display: block;

    margin-bottom: 9px;

    color: #c7d2fe;

    font-size: 0.55rem;
    font-weight: 850;
    text-transform: uppercase;
}


.combinatorics-calculation-card > strong {
    display: block;

    margin-bottom: 12px;

    color: #ffffff;

    font-size: 1.25rem;
}


.combinatorics-calculation-card > div {
    margin-top: 8px;
    padding: 12px;

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

    border-radius: 10px;

    text-align: center;
}


.combinatorics-calculation-card .result {
    color: #ffffff;
    background: var(--comb12-green);

    font-weight: 900;
}


/* ==========================================================
   COMBINATION
========================================================== */

.combinatorics-combination-section {
    background: #ffffff;
}


.combinatorics-combination-example {
    max-width: 950px;

    display: grid;

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

    align-items: center;

    gap: 9px;

    margin-inline: auto;
    padding: 24px;

    color: #ffffff;

    background:
        linear-gradient(
            145deg,
            #7c2d12,
            #ea580c
        );

    border-radius: 24px;
}


.combinatorics-combination-example > div {
    min-height: 130px;

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

    padding: 13px;

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

    border-radius: 12px;

    text-align: center;
}


.combinatorics-combination-example span,
.combinatorics-combination-example strong {
    display: block;
}


.combinatorics-combination-example span {
    margin-bottom: 6px;

    color: #fed7aa;

    font-size: 0.52rem;
}


.combinatorics-combination-example strong {
    color: #ffffff;
}


.combinatorics-combination-example > i {
    color: #fde68a;

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


.combinatorics-combination-example .result {
    background: var(--comb12-green);
}


/* ==========================================================
   COMPARE
========================================================== */

.combinatorics-compare-section {
    background: var(--comb12-soft);
}


.combinatorics-compare-grid {
    max-width: 950px;

    display: grid;

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

    gap: 16px;

    margin-inline: auto;
}


.combinatorics-compare-grid article {
    padding: 25px;

    background: #ffffff;

    border:
        1px solid
        var(--comb12-border);

    border-radius: 22px;
}


.combinatorics-compare-grid article > span {
    display: block;

    margin-bottom: 8px;

    color: var(--comb12-primary);

    font-size: 0.57rem;
    font-weight: 850;
    text-transform: uppercase;
}


.combinatorics-compare-grid article > strong {
    display: block;

    color: var(--comb12-primary-dark);

    font-size: 1.25rem;
}


.combinatorics-compare-grid ul {
    margin: 18px 0 0;
    padding-left: 20px;

    color: var(--comb12-muted);

    line-height: 1.9;
}


.combinatorics-decision-note {
    max-width: 950px;

    margin: 17px auto 0;
    padding: 18px;

    color: #5b21b6;
    background: var(--comb12-primary-soft);

    border:
        1px solid
        #ddd6fe;

    border-radius: 14px;

    line-height: 1.7;

    text-align: center;
}


/* ==========================================================
   PROBABILITY
========================================================== */

.combinatorics-probability-section {
    background: #ffffff;
}


.combinatorics-probability-grid h3 {
    margin: 0 0 10px;
}


/* ==========================================================
   COMPOUND PROBABILITY
========================================================== */

.combinatorics-compound-section {
    background: var(--comb12-soft);
}


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

.combinatorics-probability-example {
    background: #ffffff;
}


.combinatorics-probability-example-card {
    display: grid;

    grid-template-columns:
        minmax(0, 0.8fr)
        minmax(0, 1.2fr);

    align-items: center;

    gap: 25px;

    padding: 30px;

    color: #ffffff;

    background:
        linear-gradient(
            145deg,
            #134e4a,
            #0f766e
        );

    border-radius: 26px;
}


.combinatorics-probability-example-text > span {
    display: block;

    margin-bottom: 8px;

    color: #99f6e4;

    font-size: 0.56rem;
    font-weight: 850;
    text-transform: uppercase;
}


.combinatorics-probability-example-text h3 {
    margin: 0 0 10px;

    color: #ffffff;

    font-size: 1.45rem;
}


.combinatorics-probability-example-text p {
    color:
        rgba(255, 255, 255, 0.78);

    line-height: 1.67;
}


.combinatorics-probability-example-calc {
    display: grid;

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

    gap: 9px;
}


.combinatorics-probability-example-calc > div {
    min-height: 130px;

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

    padding: 13px;

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

    border-radius: 12px;

    text-align: center;
}


.combinatorics-probability-example-calc span,
.combinatorics-probability-example-calc strong {
    display: block;
}


.combinatorics-probability-example-calc span {
    margin-bottom: 6px;

    color: #ccfbf1;

    font-size: 0.5rem;
}


.combinatorics-probability-example-calc strong {
    color: #ffffff;
}


.combinatorics-probability-example-calc .result {
    background:
        rgba(255, 255, 255, 0.17);
}


/* ==========================================================
   MISTAKES
========================================================== */

.combinatorics-mistake-section {
    background: var(--comb12-soft);
}


.combinatorics-mistake-grid {
    display: grid;

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

    gap: 14px;
}


.combinatorics-mistake-grid article {
    min-height: 255px;

    padding: 21px;

    background: #ffffff;

    border:
        1px solid
        var(--comb12-border);

    border-radius: 19px;
}


.combinatorics-mistake-grid article > span {
    display: block;

    margin-bottom: 10px;

    color: var(--comb12-secondary);

    font-size: 0.55rem;
    font-weight: 850;
    text-transform: uppercase;
}


.combinatorics-mistake-grid strong {
    display: block;

    margin-bottom: 10px;

    color: var(--comb12-primary-dark);
}


.combinatorics-mistake-grid p {
    color: var(--comb12-muted);

    line-height: 1.65;
}


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

.combinatorics-strategy-section {
    background: #ffffff;
}


.combinatorics-strategy-grid {
    display: grid;

    grid-template-columns:
        repeat(5, minmax(0, 1fr));

    gap: 12px;
}


.combinatorics-strategy-grid article {
    min-height: 245px;

    padding: 20px;

    background: var(--comb12-soft);

    border:
        1px solid
        var(--comb12-border);

    border-radius: 18px;
}


.combinatorics-strategy-grid h3 {
    margin: 0 0 9px;
}


.combinatorics-strategy-grid p {
    margin: 0;

    color: var(--comb12-muted);

    line-height: 1.65;
}


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

.combinatorics-lab-section {
    color: #ffffff;

    background: #0f172a;
}


.combinatorics-lab-section .section-eyebrow {
    color: #c4b5fd;
}


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


.combinatorics-lab-card {
    max-width: 1120px;

    margin: 0 auto 22px;
    padding: 30px;

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

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

    border-radius: 28px;
}


.combinatorics-lab-heading {
    margin-bottom: 24px;

    text-align: center;
}


.combinatorics-lab-heading > span {
    display: block;

    margin-bottom: 5px;

    color: #c4b5fd;

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


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

    color: #ffffff;
}


.combinatorics-lab-heading p {
    margin: 0;

    color: #94a3b8;
}


/* ==========================================================
   LAB 1
========================================================== */

.combinatorics-calculator-layout,
.combinatorics-hyper-layout {
    display: grid;

    grid-template-columns:
        0.33fr 0.67fr;

    gap: 12px;

    margin-bottom: 12px;
}


.combinatorics-calculator-controls,
.combinatorics-hyper-controls {
    display: flex;
    flex-direction: column;

    gap: 9px;
}


.combinatorics-calculator-controls label,
.combinatorics-hyper-controls label {
    padding: 13px;

    color: #334155;
    background: #ffffff;

    border-radius: 12px;
}


.combinatorics-calculator-controls label > span,
.combinatorics-hyper-controls label > span {
    display: block;

    margin-bottom: 6px;

    color: var(--comb12-muted);

    font-size: 0.5rem;
    font-weight: 850;
    text-transform: uppercase;
}


.combinatorics-calculator-controls input,
.combinatorics-calculator-controls select,
.combinatorics-hyper-controls input {
    width: 100%;
    min-height: 42px;

    padding: 8px 10px;

    border:
        1px solid
        var(--comb12-border);

    border-radius: 9px;
}


.combinatorics-input-grid {
    display: grid;

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

    gap: 8px;
}


.combinatorics-calculator-controls .button,
.combinatorics-hyper-controls .button {
    width: 100%;
}


.combinatorics-calculator-results {
    display: grid;

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

    gap: 8px;
}


.combinatorics-calculator-results > div,
.combinatorics-hyper-results > div {
    min-height: 140px;

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

    padding: 12px;

    color: #334155;
    background: #ffffff;

    border-radius: 12px;

    text-align: center;
}


.combinatorics-calculator-results span,
.combinatorics-calculator-results strong,
.combinatorics-hyper-results span,
.combinatorics-hyper-results strong {
    display: block;
}


.combinatorics-calculator-results span,
.combinatorics-hyper-results span {
    margin-bottom: 6px;

    color: var(--comb12-muted);

    font-size: 0.49rem;
}


.combinatorics-calculator-results strong,
.combinatorics-hyper-results strong {
    max-width: 100%;

    overflow-wrap: anywhere;

    color: var(--comb12-primary-dark);

    line-height: 1.5;
}


.combinatorics-calculator-results .result,
.combinatorics-hyper-results .result {
    color: #ffffff;
    background: var(--comb12-green);
}


.combinatorics-calculator-results .result span,
.combinatorics-calculator-results .result strong,
.combinatorics-hyper-results .result span,
.combinatorics-hyper-results .result strong {
    color: #ffffff;
}


/* ==========================================================
   LAB 2
========================================================== */

.combinatorics-hyper-results {
    display: grid;

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

    gap: 8px;
}


.combinatorics-lab-message {
    padding: 14px;

    color: #ede9fe;

    background:
        rgba(124, 58, 237, 0.15);

    border:
        1px solid
        rgba(196, 181, 253, 0.22);

    border-radius: 11px;

    text-align: center;

    line-height: 1.6;
}


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

.combinatorics-practice-section {
    background: var(--comb12-soft);
}


.combinatorics-practice-grid {
    display: grid;

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

    gap: 16px;
}


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

    padding: 23px;

    background: #ffffff;

    border:
        1px solid
        var(--comb12-border);

    border-radius: 21px;
}


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

    margin-bottom: 12px;

    color: var(--comb12-primary);

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


.combinatorics-practice-grid h3 {
    min-height: 110px;

    margin: 0 0 18px;

    line-height: 1.5;
}


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

    border-top:
        1px solid
        var(--comb12-border);
}


.combinatorics-practice-grid summary {
    color: var(--comb12-primary-dark);

    cursor: pointer;

    font-weight: 800;
}


.combinatorics-practice-grid details p {
    color: var(--comb12-muted);

    line-height: 1.7;
}


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

.combinatorics-quiz-section {
    background: #ffffff;
}


.combinatorics-quiz-wrapper {
    max-width: 980px;

    margin-inline: auto;
}


.combinatorics-quiz-heading {
    margin-bottom: 25px;

    text-align: center;
}


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


.combinatorics-quiz-card {
    padding: 28px;

    background: var(--comb12-soft);

    border:
        1px solid
        var(--comb12-border);

    border-radius: 26px;
}


.combinatorics-quiz-question {
    padding: 22px 0;

    border-bottom:
        1px solid
        var(--comb12-border);
}


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


.combinatorics-quiz-question > span {
    display: block;

    margin-bottom: 8px;

    color: var(--comb12-primary);

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


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


.combinatorics-quiz-options {
    display: grid;

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

    gap: 8px;
}


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

    padding: 10px;

    color: #334155;
    background: #ffffff;

    border:
        1px solid
        var(--comb12-border);

    border-radius: 11px;

    font-weight: 750;

    cursor: pointer;
}


.combinatorics-quiz-options button.selected {
    color: var(--comb12-primary-dark);
    background: var(--comb12-primary-soft);

    border-color: #c4b5fd;
}


.combinatorics-quiz-options button.correct {
    color: #166534;
    background: #dcfce7;

    border-color: #86efac;
}


.combinatorics-quiz-options button.incorrect {
    color: #991b1b;
    background: #fee2e2;

    border-color: #fca5a5;
}


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

    gap: 10px;

    padding-top: 22px;
}


.combinatorics-quiz-result {
    flex-basis: 100%;

    color: #334155;

    font-weight: 750;
}


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

.combinatorics-summary-section {
    background: var(--comb12-soft);
}


.combinatorics-summary-card {
    padding: 35px;

    color: #ffffff;

    background:
        linear-gradient(
            135deg,
            #6d28d9,
            #7c3aed 48%,
            #c2410c
        );

    border-radius: 28px;
}


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


.combinatorics-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;
}


.combinatorics-summary-card h2 {
    margin: 0;

    color: #ffffff;
}


.combinatorics-summary-grid {
    display: grid;

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

    gap: 10px;
}


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

    color:
        rgba(255, 255, 255, 0.82);

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

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

    border-radius: 14px;

    line-height: 1.65;
}


.combinatorics-summary-grid strong {
    color: #fde68a;
}


/* ==========================================================
   COMPLETION
========================================================== */

.combinatorics-completion-section {
    background: #ffffff;
}


.combinatorics-completion-card {
    display: grid;

    grid-template-columns:
        minmax(0, 0.85fr)
        minmax(0, 1.15fr);

    align-items: center;

    gap: 30px;

    padding: 34px;

    background: var(--comb12-soft);

    border:
        1px solid
        var(--comb12-border);

    border-radius: 26px;
}


.combinatorics-completion-card > div:first-child > span {
    display: block;

    margin-bottom: 7px;

    color: var(--comb12-primary);

    font-size: 0.57rem;
    font-weight: 850;
    text-transform: uppercase;
}


.combinatorics-completion-card h2 {
    margin: 0 0 11px;
}


.combinatorics-completion-card p {
    color: var(--comb12-muted);

    line-height: 1.7;
}


.combinatorics-completion-list {
    display: flex;
    flex-direction: column;

    gap: 8px;
}


.combinatorics-completion-list > div {
    display: grid;

    grid-template-columns:
        auto 1fr auto;

    align-items: center;

    gap: 12px;

    padding: 14px;

    background: #ffffff;

    border:
        1px solid
        var(--comb12-border);

    border-radius: 12px;
}


.combinatorics-completion-list span {
    width: 38px;
    height: 38px;

    display: grid;
    place-items: center;

    color: #ffffff;
    background: var(--comb12-primary);

    border-radius: 10px;

    font-size: 0.54rem;
    font-weight: 900;
}


.combinatorics-completion-list b {
    color: var(--comb12-green);

    font-size: 1.1rem;
}


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

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

    background: #ffffff;
}


.combinatorics-navigation {
    display: grid;

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

    gap: 12px;
}


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

    gap: 15px;

    padding: 20px;

    color: #334155;
    background: var(--comb12-soft);

    border:
        1px solid
        var(--comb12-border);

    border-radius: 17px;

    text-decoration: none;
}


.combinatorics-navigation-card:hover {
    border-color: #c4b5fd;
}


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

    text-align: right;
}


.combinatorics-navigation-card > span {
    color: var(--comb12-primary);

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


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


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

    color: var(--comb12-muted);
}


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

    color: var(--comb12-muted);

    font-size: 0.62rem;
}


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

@media (max-width: 1120px) {

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

        gap: 48px;
    }


    .combinatorics-hero-visual,
    .combinatorics-counting-example-card,
    .combinatorics-calculation-card {
        width: 100%;
        max-width: 840px;

        margin-inline: auto;
    }


    .combinatorics-permutation-grid,
    .combinatorics-compound-grid,
    .combinatorics-mistake-grid {
        grid-template-columns:
            repeat(2, minmax(0, 1fr));
    }


    .combinatorics-strategy-grid {
        grid-template-columns:
            repeat(3, minmax(0, 1fr));
    }

}


@media (max-width: 900px) {

    .combinatorics-calculator-layout,
    .combinatorics-hyper-layout,
    .combinatorics-probability-example-card,
    .combinatorics-completion-card {
        grid-template-columns: 1fr;
    }

}


@media (max-width: 760px) {

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

}


@media (max-width: 680px) {

    .combinatorics-grade-twelve-page .section {
        padding: 62px 0;
    }


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


    .combinatorics-hero-content h1 {
        font-size:
            clamp(
                2.4rem,
                11vw,
                3.7rem
            );
    }


    .combinatorics-hero-actions {
        flex-direction: column;
    }


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


    .combinatorics-hero-meta,
    .combinatorics-board-formulas,
    .combinatorics-objective-list,
    .combinatorics-counting-grid,
    .combinatorics-factorial-grid,
    .combinatorics-permutation-grid,
    .combinatorics-compare-grid,
    .combinatorics-probability-grid,
    .combinatorics-compound-grid,
    .combinatorics-probability-example-calc,
    .combinatorics-mistake-grid,
    .combinatorics-strategy-grid,
    .combinatorics-calculator-results,
    .combinatorics-hyper-results,
    .combinatorics-practice-grid,
    .combinatorics-summary-grid,
    .combinatorics-navigation {
        grid-template-columns: 1fr;
    }


    .combinatorics-board-tree .branches {
        grid-template-columns: 1fr;
    }


    .combinatorics-counting-example-card,
    .combinatorics-combination-example {
        grid-template-columns: 1fr;
    }


    .combinatorics-counting-example-card > i,
    .combinatorics-combination-example > i {
        justify-self: center;
    }


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


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

        text-align: left;
    }

}


@media (max-width: 460px) {

    .combinatorics-board,
    .combinatorics-lab-card,
    .combinatorics-quiz-card,
    .combinatorics-summary-card,
    .combinatorics-completion-card {
        padding: 20px;
    }


    .combinatorics-input-grid {
        grid-template-columns: 1fr;
    }

}