/* ==========================================================
   BELAJAREDUTECH
   HALAMAN KELAS SD 2 - 6
========================================================== */


/* ==========================================================
   THEME PER KELAS
========================================================== */

.grade-2 {
    --grade-accent: #2563eb;
    --grade-accent-dark: #1d4ed8;
    --grade-accent-soft: #eff6ff;
    --grade-secondary: #0891b2;
}


.grade-3 {
    --grade-accent: #0f766e;
    --grade-accent-dark: #115e59;
    --grade-accent-soft: #f0fdfa;
    --grade-secondary: #2563eb;
}


.grade-4 {
    --grade-accent: #7c3aed;
    --grade-accent-dark: #6d28d9;
    --grade-accent-soft: #f5f3ff;
    --grade-secondary: #2563eb;
}


.grade-5 {
    --grade-accent: #c2410c;
    --grade-accent-dark: #9a3412;
    --grade-accent-soft: #fff7ed;
    --grade-secondary: #7c3aed;
}


.grade-6 {
    --grade-accent: #4338ca;
    --grade-accent-dark: #3730a3;
    --grade-accent-soft: #eef2ff;
    --grade-secondary: #0f766e;
}



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

.grade-breadcrumb-section {
    padding:
        calc(var(--header-height, 72px) + 24px)
        0
        0;

    background:
        var(--color-background, #ffffff);
}


.grade-breadcrumb {
    display: flex;

    align-items: center;

    flex-wrap: wrap;

    gap: 8px;

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

    font-size: 0.76rem;
}


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

    text-decoration: none;
}


.grade-breadcrumb a:hover {
    color:
        var(--grade-accent);
}


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



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

.grade-hero {
    position: relative;

    overflow: hidden;

    padding:
        70px 0 80px;

    background:
        radial-gradient(
            circle at 85% 20%,
            color-mix(
                in srgb,
                var(--grade-accent) 12%,
                transparent
            ),
            transparent 30%
        ),
        linear-gradient(
            180deg,
            var(--grade-accent-soft),
            #ffffff
        );
}


.grade-hero::before {
    content: "";

    position: absolute;

    width: 380px;
    height: 380px;

    left: -180px;
    bottom: -240px;

    background:
        var(--grade-accent);

    border-radius: 50%;

    opacity: 0.05;

    pointer-events: none;
}


.grade-hero-container {
    position: relative;

    z-index: 2;

    display: grid;

    grid-template-columns:
        minmax(0, 1.08fr)
        minmax(380px, 0.92fr);

    align-items: center;

    gap: 65px;
}


.grade-badge {
    width: max-content;

    display: inline-flex;

    align-items: center;

    gap: 9px;

    margin-bottom: 20px;

    padding: 8px 12px;

    color:
        var(--grade-accent-dark);

    background:
        color-mix(
            in srgb,
            var(--grade-accent) 10%,
            #ffffff
        );

    border:
        1px solid
        color-mix(
            in srgb,
            var(--grade-accent) 20%,
            #ffffff
        );

    border-radius: 999px;

    font-size: 0.7rem;

    font-weight: 850;

    text-transform: uppercase;

    letter-spacing: 0.07em;
}


.grade-badge span {
    width: 28px;
    height: 28px;

    display: grid;

    place-items: center;

    color: #ffffff;

    background:
        var(--grade-accent);

    border-radius: 50%;

    font-size: 0.66rem;
}


.grade-hero-content h1 {
    max-width: 760px;

    margin-bottom: 20px;

    font-size:
        clamp(
            2.8rem,
            6vw,
            5rem
        );

    line-height: 1.02;

    letter-spacing: -0.055em;
}


.grade-hero-content > p {
    max-width: 680px;

    margin-bottom: 28px;

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

    font-size: 1rem;

    line-height: 1.8;
}


.grade-hero-actions {
    display: flex;

    flex-wrap: wrap;

    gap: 10px;

    margin-bottom: 35px;
}


.grade-hero .button-primary {
    background:
        var(--grade-accent);

    border-color:
        var(--grade-accent);
}


.grade-hero .button-primary:hover {
    background:
        var(--grade-accent-dark);

    border-color:
        var(--grade-accent-dark);
}


.grade-meta {
    display: grid;

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

    gap: 12px;

    max-width: 650px;
}


.grade-meta > div {
    padding: 14px;

    background:
        rgba(255, 255, 255, 0.7);

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

    border-radius:
        var(--radius-medium, 14px);
}


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


.grade-meta strong {
    margin-bottom: 3px;

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

    font-size: 0.78rem;
}


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

    font-size: 0.66rem;
}



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

.grade-hero-board {
    position: relative;

    min-height: 430px;

    display: flex;

    flex-direction: column;

    justify-content: center;

    padding: 38px;

    color: #ffffff;

    background:
        linear-gradient(
            135deg,
            var(--grade-accent),
            var(--grade-secondary)
        );

    border-radius:
        var(--radius-extra-large, 28px);

    box-shadow:
        var(
            --shadow-large,
            0 30px 80px rgba(15, 23, 42, 0.18)
        );
}


.grade-board-label {
    margin-bottom: 30px;

    color:
        rgba(255, 255, 255, 0.72);

    font-size: 0.7rem;

    font-weight: 800;

    text-transform: uppercase;

    letter-spacing: 0.09em;
}


.grade-board-equation {
    margin-bottom: 25px;

    padding: 28px;

    background:
        rgba(255, 255, 255, 0.1);

    border:
        1px solid
        rgba(255, 255, 255, 0.16);

    border-radius:
        var(--radius-large, 20px);

    text-align: center;

    font-size:
        clamp(
            2.2rem,
            5vw,
            4rem
        );

    font-weight: 900;

    letter-spacing: -0.04em;
}


.grade-board-equation strong {
    color: #ffffff;
}


.grade-board-equation small {
    font-size: 0.52em;

    opacity: 0.75;
}


.grade-board-topic {
    display: flex;

    align-items: center;

    justify-content: space-between;

    gap: 15px;

    padding: 16px 18px;

    background:
        rgba(255, 255, 255, 0.1);

    border-radius:
        var(--radius-medium, 14px);
}


.grade-board-topic span {
    color:
        rgba(255, 255, 255, 0.7);

    font-size: 0.68rem;
}


.grade-board-topic strong {
    font-size: 0.8rem;
}



/* ==========================================================
   SUBJECT
========================================================== */

.grade-subject-section {
    background:
        var(--color-background, #ffffff);
}


.grade-section-heading {
    max-width: 760px;

    margin-bottom: 40px;
}


.grade-section-heading.center {
    margin-inline: auto;

    text-align: center;
}


.grade-section-heading .section-eyebrow {
    color:
        var(--grade-accent);
}


.grade-section-heading h2 {
    margin-bottom: 15px;

    font-size:
        clamp(
            2.1rem,
            4vw,
            3.5rem
        );

    letter-spacing: -0.045em;
}


.grade-section-heading p {
    color:
        var(--color-text-muted, #64748b);

    line-height: 1.8;
}


.grade-subject-grid {
    display: grid;

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

    gap: 20px;
}


.grade-subject-card {
    position: relative;

    padding: 28px;

    background: #ffffff;

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

    border-radius:
        var(--radius-large, 20px);

    box-shadow:
        var(
            --shadow-small,
            0 8px 30px rgba(15, 23, 42, 0.06)
        );
}


.grade-subject-card.active {
    background:
        linear-gradient(
            180deg,
            var(--grade-accent-soft),
            #ffffff
        );

    border-color:
        color-mix(
            in srgb,
            var(--grade-accent) 25%,
            #ffffff
        );
}


.grade-subject-icon {
    width: 50px;
    height: 50px;

    display: grid;

    place-items: center;

    margin-bottom: 25px;

    color: #ffffff;

    background:
        var(--grade-accent);

    border-radius: 14px;

    font-size: 1.2rem;

    font-weight: 900;
}


.grade-subject-card h3 {
    margin-bottom: 10px;

    font-size: 1.08rem;
}


.grade-subject-card p {
    margin-bottom: 18px;

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

    font-size: 0.82rem;

    line-height: 1.7;
}


.grade-subject-status {
    display: inline-flex;

    padding: 6px 9px;

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

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

    border-radius: 999px;

    font-size: 0.63rem;

    font-weight: 800;
}


.grade-subject-card.active
.grade-subject-status {
    color:
        var(--grade-accent-dark);

    background:
        color-mix(
            in srgb,
            var(--grade-accent) 10%,
            #ffffff
        );
}



/* ==========================================================
   MATH TOPICS
========================================================== */

.grade-math-section {
    background:
        var(--color-background-soft, #f8fafc);
}


.grade-topic-grid {
    display: grid;

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

    gap: 18px;
}


.grade-topic-card {
    position: relative;

    overflow: hidden;

    min-height: 230px;

    display: flex;

    flex-direction: column;

    padding: 25px;

    background: #ffffff;

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

    border-radius:
        var(--radius-large, 20px);

    box-shadow:
        var(
            --shadow-small,
            0 8px 30px rgba(15, 23, 42, 0.05)
        );

    transition:
        transform var(--transition-fast, 0.2s ease),
        border-color var(--transition-fast, 0.2s ease);
}


.grade-topic-card:hover {
    transform:
        translateY(-4px);

    border-color:
        color-mix(
            in srgb,
            var(--grade-accent) 35%,
            #ffffff
        );
}


.grade-topic-card::after {
    content: "";

    position: absolute;

    width: 90px;
    height: 90px;

    right: -35px;
    bottom: -35px;

    background:
        var(--grade-accent);

    border-radius: 50%;

    opacity: 0.06;
}


.grade-topic-number {
    display: block;

    margin-bottom: 30px;

    color:
        var(--grade-accent);

    font-size: 0.66rem;

    font-weight: 900;

    letter-spacing: 0.08em;
}


.grade-topic-card h3 {
    margin-bottom: 10px;

    font-size: 1.06rem;
}


.grade-topic-card p {
    margin-bottom: 0;

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

    font-size: 0.8rem;

    line-height: 1.7;
}



/* ==========================================================
   LEARNING PATH
========================================================== */

.grade-learning-section {
    background:
        var(--color-background, #ffffff);
}


.grade-learning-grid {
    display: grid;

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

    gap: 16px;
}


.grade-learning-card {
    padding: 25px;

    background:
        var(--grade-accent-soft);

    border:
        1px solid
        color-mix(
            in srgb,
            var(--grade-accent) 15%,
            #ffffff
        );

    border-radius:
        var(--radius-large, 20px);
}


.grade-learning-card > span {
    width: 40px;
    height: 40px;

    display: grid;

    place-items: center;

    margin-bottom: 22px;

    color: #ffffff;

    background:
        var(--grade-accent);

    border-radius: 50%;

    font-size: 0.7rem;

    font-weight: 900;
}


.grade-learning-card h3 {
    margin-bottom: 8px;

    font-size: 0.98rem;
}


.grade-learning-card p {
    margin-bottom: 0;

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

    font-size: 0.78rem;

    line-height: 1.65;
}



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

.grade-navigation-section {
    padding: 35px 0 80px;

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


.grade-navigation {
    display: grid;

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

    gap: 16px;
}


.grade-navigation-card {
    display: flex;

    align-items: center;

    gap: 15px;

    padding: 22px;

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

    background: #ffffff;

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

    border-radius:
        var(--radius-large, 20px);

    text-decoration: none;

    transition:
        transform var(--transition-fast, 0.2s ease),
        border-color var(--transition-fast, 0.2s ease);
}


.grade-navigation-card:hover {
    transform:
        translateY(-3px);

    border-color:
        var(--grade-accent);
}


.grade-navigation-card.forward {
    justify-content: flex-end;

    text-align: right;
}


.grade-navigation-card > span {
    color:
        var(--grade-accent);

    font-size: 1.25rem;

    font-weight: 900;
}


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


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

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

    font-size: 0.64rem;
}


.grade-navigation-card strong {
    font-size: 0.86rem;
}



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

@media (max-width: 1024px) {

    .grade-hero-container {
        grid-template-columns: 1fr;

        gap: 45px;
    }


    .grade-hero-board {
        max-width: 700px;
    }


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


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

}



@media (max-width: 860px) {

    .grade-subject-grid {
        grid-template-columns: 1fr;
    }

}



@media (max-width: 600px) {

    .grade-hero {
        padding:
            50px 0 60px;
    }


    .grade-hero-board {
        min-height: 360px;

        padding: 25px;
    }


    .grade-meta {
        grid-template-columns: 1fr;
    }


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


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


    .grade-topic-grid,
    .grade-learning-grid {
        grid-template-columns: 1fr;
    }


    .grade-navigation {
        grid-template-columns: 1fr;
    }

}