/* =========================================================
   SEQUENCES & SERIES PRACTICE
   ========================================================= */

:root
{
    --sasp-navy: #0f172a;
    --sasp-slate: #475569;
    --sasp-muted: #64748b;

    --sasp-border: #d7e2ec;
    --sasp-white: #ffffff;
    --sasp-surface: #f8fafc;

    --sasp-blue: #0f5f8f;
    --sasp-blue-dark: #0a4569;
    --sasp-blue-soft: #edf6fb;

    --sasp-teal: #159a9c;
    --sasp-teal-dark: #0f7476;
    --sasp-teal-soft: #eaf8f7;

    --sasp-green: #24855b;
    --sasp-green-soft: #eef9f3;

    --sasp-red: #b84a4a;
    --sasp-red-soft: #fff1f1;

    --sasp-purple: #7154a3;
    --sasp-purple-soft: #f4effb;

    --sasp-orange: #c96d1b;
    --sasp-orange-soft: #fff5e9;

    --sasp-shadow:
        0 0.75rem 2rem
        rgba(
            15,
            23,
            42,
            0.06
        );

    --sasp-shadow-hover:
        0 1rem 2.5rem
        rgba(
            15,
            23,
            42,
            0.10
        );
}


/* =========================================================
   BASE
   ========================================================= */

#sequences-series-practice
{
    scroll-margin-top: 5rem;
}

#sequences-series-practice,
.sasp-intro-card,
.sasp-problem-card,
.sasp-final-review,
.sasp-related-section
{
    color: var(--sasp-slate);

    font-family:
        Inter,
        Arial,
        sans-serif;
}

#sequences-series-practice .lead
{
    color: var(--sasp-slate);

    font-size:
        clamp(
            1.05rem,
            1.8vw,
            1.2rem
        );

    line-height: 1.75;
}


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

.sasp-intro-card
{
    padding:
        clamp(
            1.4rem,
            4vw,
            2rem
        );

    background:
        linear-gradient(
            135deg,
            var(--sasp-teal-soft),
            var(--sasp-blue-soft)
        );

    border:
        1px solid
        rgba(
            21,
            154,
            156,
            0.22
        );

    border-radius: 1.2rem;
}

.sasp-card-eyebrow,
.sasp-level-label,
.sasp-problem-number,
.sasp-solution-label
{
    margin:
        0
        0
        0.45rem;

    color: var(--sasp-teal-dark);

    font-size: 0.76rem;
    font-weight: 800;

    letter-spacing: 0.1em;

    line-height: 1.3;

    text-transform: uppercase;
}

.sasp-intro-card h2
{
    color: var(--sasp-navy);

    font-weight: 800;

    letter-spacing: -0.025em;
}

.sasp-essentials-grid
{
    display: grid;

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

    gap: 1rem;
}

.sasp-essentials-grid article
{
    min-width: 0;

    padding: 1.15rem;

    background:
        rgba(
            255,
            255,
            255,
            0.88
        );

    border:
        1px solid
        rgba(
            148,
            163,
            184,
            0.22
        );

    border-radius: 1rem;
}

.sasp-essentials-grid h3
{
    margin:
        0
        0
        1rem;

    color: var(--sasp-navy);

    font-weight: 800;

    text-align: center;
}

.sasp-essentials-grid article > p
{
    color: var(--sasp-slate);

    font-size: 0.9rem;

    line-height: 1.6;

    text-align: center;
}


/* =========================================================
   MINI FORMULAS
   ========================================================= */

.sasp-mini-formula
{
    display: grid;

    min-width: 0;
    min-height: 7rem;

    margin-bottom: 1rem;

    padding:
        0.9rem
        0.7rem;

    align-content: center;

    color: var(--sasp-teal-dark);

    text-align: center;

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

    border:
        1px solid
        rgba(
            21,
            154,
            156,
            0.14
        );

    border-radius: 0.8rem;
}

.sasp-mini-formula mjx-container
{
    max-width: 100%;

    overflow-x: auto;
    overflow-y: hidden;
}


/* =========================================================
   RESOURCE BUTTONS
   ========================================================= */

.sasp-resource-actions
{
    display: flex;

    flex-wrap: wrap;

    gap: 0.8rem;

    align-items: center;
}


/* =========================================================
   LEVEL HEADINGS
   ========================================================= */

.sasp-level-heading
{
    margin:
        4.5rem
        0
        1.6rem;

    padding-bottom: 1.1rem;

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

.sasp-level-heading:first-of-type
{
    margin-top: 3.5rem;
}

.sasp-level-heading h2
{
    color: var(--sasp-navy);

    font-size:
        clamp(
            1.55rem,
            3vw,
            2rem
        );

    font-weight: 800;

    letter-spacing: -0.025em;

    line-height: 1.2;
}

.sasp-level-heading > p:last-child
{
    max-width: 46rem;

    color: var(--sasp-slate);

    line-height: 1.7;
}


/* =========================================================
   PROBLEM CARDS
   ========================================================= */

.sasp-problem-card
{
    overflow: hidden;

    background: var(--sasp-white);

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

    border-radius: 1.2rem;

    box-shadow: var(--sasp-shadow);
}

.sasp-problem-body
{
    padding:
        clamp(
            1.35rem,
            4vw,
            2rem
        );
}

.sasp-problem-heading
{
    display: flex;

    flex-wrap: wrap;

    gap:
        0.6rem
        1rem;

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

    margin-bottom: 1.2rem;
}

.sasp-problem-number
{
    margin-bottom: 0;
}

.sasp-problem-skill
{
    display: inline-flex;

    align-items: center;

    padding:
        0.38rem
        0.7rem;

    color: var(--sasp-teal-dark);

    font-size: 0.72rem;
    font-weight: 800;

    letter-spacing: 0.04em;

    line-height: 1.2;

    background: var(--sasp-teal-soft);

    border:
        1px solid
        rgba(
            21,
            154,
            156,
            0.18
        );

    border-radius: 999px;
}

.sasp-problem-card h3
{
    margin-bottom: 1.5rem;

    color: var(--sasp-navy);

    font-weight: 700;

    line-height: 1.55;
}


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

.sasp-graph-wrap
{
    margin:
        1.25rem
        0
        1.5rem;

    padding: 1rem;

    background: var(--sasp-surface);

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

    border-radius: 1rem;
}

.sasp-graph
{
    width: 100%;
    height: 420px;

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

    border-radius: 0.85rem;

    background: var(--sasp-white);
}

.sasp-number-line-graph
{
    height: 260px;
}


/* =========================================================
   MULTIPLE CHOICE
   ========================================================= */

.sasp-choice-grid
{
    display: grid;

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

    gap: 0.75rem;

    margin:
        0
        0
        1.5rem;
}

.sasp-choice
{
    display: grid;

    min-width: 0;
    min-height: 4.5rem;

    padding: 0.9rem;

    place-items: center;

    color: var(--sasp-slate);

    font-size: 0.9rem;
    font-weight: 600;

    line-height: 1.5;

    text-align: center;

    background: var(--sasp-surface);

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

    border-radius: 0.85rem;
}


/* =========================================================
   SOLUTIONS
   ========================================================= */

.sasp-solution
{
    margin-top: 1.4rem;

    padding:
        clamp(
            1.2rem,
            3.5vw,
            1.6rem
        );

    color: var(--sasp-slate);

    background:
        linear-gradient(
            135deg,
            #f8fafc,
            #f0fdfa
        );

    border:
        1px solid
        rgba(
            21,
            154,
            156,
            0.18
        );

    border-radius: 1rem;
}

.sasp-solution-label
{
    margin-bottom: 1rem;
}

.sasp-solution > p:not(.sasp-solution-label)
{
    line-height: 1.7;
}


/* =========================================================
   SOLUTION MATH
   ========================================================= */

.sasp-solution-math
{
    min-width: 0;

    margin:
        1rem
        0;

    padding:
        0.8rem
        1rem;

    color: var(--sasp-teal-dark);

    text-align: center;

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

    border:
        1px solid
        rgba(
            21,
            154,
            156,
            0.14
        );

    border-radius: 0.85rem;
}

.sasp-solution-math mjx-container
{
    max-width: 100%;

    overflow-x: auto;
    overflow-y: hidden;
}


/* =========================================================
   FINAL ANSWERS
   ========================================================= */

.sasp-final-answer
{
    display: flex;

    flex-wrap: wrap;

    gap:
        0.55rem
        0.8rem;

    align-items: center;

    min-width: 0;

    margin-top: 1.25rem;

    padding:
        0.9rem
        1rem;

    color: var(--sasp-green);

    background: var(--sasp-green-soft);

    border:
        1px solid
        rgba(
            36,
            133,
            91,
            0.2
        );

    border-radius: 0.85rem;
}

.sasp-final-answer strong
{
    color: var(--sasp-green);

    font-weight: 800;
}

.sasp-final-answer mjx-container
{
    max-width: 100%;

    margin:
        0.25rem
        auto !important;

    color: var(--sasp-green);

    overflow-x: auto;
    overflow-y: hidden;
}


/* =========================================================
   FINAL REVIEW
   ========================================================= */

.sasp-final-review
{
    margin-top: 4rem;

    padding:
        clamp(
            1.4rem,
            4vw,
            2rem
        );

    background:
        linear-gradient(
            135deg,
            var(--sasp-teal-soft),
            var(--sasp-blue-soft)
        );

    border:
        1px solid
        rgba(
            21,
            154,
            156,
            0.22
        );

    border-radius: 1.2rem;
}

.sasp-final-review h2
{
    color: var(--sasp-navy);

    font-weight: 800;

    letter-spacing: -0.025em;
}

.sasp-process-list
{
    display: grid;

    gap: 0.7rem;

    padding-left: 1.4rem;
}

.sasp-process-list li
{
    padding-left: 0.25rem;

    color: var(--sasp-slate);

    line-height: 1.65;
}

.sasp-process-list li::marker
{
    color: var(--sasp-teal-dark);

    font-weight: 800;
}


/* =========================================================
   RELATED RESOURCES
   ========================================================= */

.sasp-related-section
{
    margin-top: 4rem;
}

.sasp-related-section > h2
{
    color: var(--sasp-navy);

    font-size:
        clamp(
            1.6rem,
            3vw,
            2rem
        );

    font-weight: 800;

    letter-spacing: -0.025em;
}

.sasp-related-section > p
{
    color: var(--sasp-slate);

    line-height: 1.7;
}

.sasp-related-grid
{
    display: grid;

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

    gap: 1rem;
}

.sasp-related-card
{
    display: block;

    min-width: 0;

    padding: 1.2rem;

    color: inherit;

    text-decoration: none;

    background: var(--sasp-white);

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

    border-radius: 1rem;

    box-shadow: var(--sasp-shadow);

    transition:
        transform 0.18s ease,
        box-shadow 0.18s ease,
        border-color 0.18s ease;
}

.sasp-related-card:hover
{
    color: inherit;

    text-decoration: none;

    transform: translateY(-3px);

    border-color:
        rgba(
            21,
            154,
            156,
            0.4
        );

    box-shadow: var(--sasp-shadow-hover);
}

.sasp-related-icon
{
    display: grid;

    width: 2.7rem;
    height: 2.7rem;

    margin-bottom: 0.9rem;

    place-items: center;

    color: var(--sasp-blue);

    background: var(--sasp-blue-soft);

    border-radius: 0.8rem;
}

.sasp-related-card h3
{
    margin:
        0
        0
        0.45rem;

    color: var(--sasp-navy);

    font-size: 1rem;
    font-weight: 800;

    line-height: 1.4;
}

.sasp-related-card p
{
    margin: 0;

    color: var(--sasp-slate);

    font-size: 0.89rem;

    line-height: 1.6;
}


/* =========================================================
   MATHJAX SAFETY
   ========================================================= */

.sasp-problem-card mjx-container,
.sasp-intro-card mjx-container,
.sasp-final-review mjx-container,
.sasp-choice mjx-container
{
    max-width: 100%;
}

.sasp-problem-card mjx-container[display="true"]
{
    overflow-x: auto;
    overflow-y: hidden;

    padding-bottom: 0.15rem;
}


/* =========================================================
   CONTACT CTA
   ========================================================= */

#sequences-series-practice #guideContactCtaTitle
{
    color: #ffffff !important;
}

#sequences-series-practice #guideContactCtaTitle ~ p
{
    color:
        rgba(
            255,
            255,
            255,
            0.78
        ) !important;
}


/* =========================================================
   ACCESSIBILITY
   ========================================================= */

.sasp-related-card:focus-visible,
.sasp-resource-actions a:focus-visible,
.sasp-problem-card button:focus-visible
{
    outline:
        3px solid
        rgba(
            15,
            95,
            143,
            0.35
        );

    outline-offset: 4px;
}


/* =========================================================
   TABLET
   ========================================================= */

@media (max-width: 991.98px)
{

    .sasp-essentials-grid
    {
        grid-template-columns: 1fr;
    }

    .sasp-mini-formula
    {
        min-height: 0;
    }

}


/* =========================================================
   MOBILE
   ========================================================= */

@media (max-width: 767.98px)
{

    #sequences-series-practice
    {
        overflow-x: hidden;

        padding-top: 4rem !important;
        padding-bottom: 4rem !important;
    }

    #sequences-series-practice .lead
    {
        font-size: 1rem;

        line-height: 1.7;
    }


    .sasp-intro-card
    {
        padding: 1.15rem;

        border-radius: 1rem;
    }

    .sasp-essentials-grid
    {
        grid-template-columns: 1fr;
    }

    .sasp-essentials-grid article
    {
        padding: 1rem;
    }


    .sasp-resource-actions
    {
        display: grid;

        grid-template-columns: 1fr;

        width: 100%;
    }

    .sasp-resource-actions .btn
    {
        width: 100%;
    }


    .sasp-level-heading
    {
        margin-top: 3.5rem;
    }


    .sasp-problem-card
    {
        border-radius: 1rem;
    }

    .sasp-problem-body
    {
        padding: 1.15rem;
    }

    .sasp-problem-heading
    {
        align-items: flex-start;
    }

    .sasp-problem-card h3
    {
        font-size: 1.05rem;

        line-height: 1.55;
    }


    .sasp-choice-grid
    {
        grid-template-columns: 1fr;
    }

    .sasp-choice
    {
        min-height: 0;

        padding:
            0.8rem
            0.9rem;
    }


    .sasp-graph-wrap
    {
        padding: 0.75rem;
    }

    .sasp-graph
    {
        height: 340px;
    }

    .sasp-number-line-graph
    {
        height: 220px;
    }


    .sasp-solution
    {
        padding: 1rem;
    }

    .sasp-solution-math
    {
        padding:
            0.7rem
            0.65rem;
    }


    .sasp-final-answer
    {
        align-items: flex-start;

        padding: 0.85rem;
    }


    .sasp-final-review
    {
        margin-top: 3.5rem;

        padding: 1.15rem;

        border-radius: 1rem;
    }


    .sasp-related-section
    {
        margin-top: 3.5rem;
    }

    .sasp-related-grid
    {
        grid-template-columns: 1fr;
    }

}


/* =========================================================
   SMALL MOBILE
   ========================================================= */

@media (max-width: 575.98px)
{

    .sasp-problem-heading
    {
        flex-direction: column;

        gap: 0.55rem;
    }

    .sasp-problem-skill
    {
        align-self: flex-start;
    }

    .sasp-problem-body > button
    {
        width: 100%;
    }

    .sasp-related-card
    {
        padding: 1rem;
    }

    .sasp-graph
    {
        height: 300px;
    }

    .sasp-number-line-graph
    {
        height: 200px;
    }

}


/* =========================================================
   VERY SMALL SCREENS
   ========================================================= */

@media (max-width: 430px)
{

    .sasp-card-eyebrow,
    .sasp-level-label,
    .sasp-problem-number,
    .sasp-solution-label
    {
        font-size: 0.7rem;
    }

    .sasp-problem-body,
    .sasp-solution,
    .sasp-intro-card,
    .sasp-final-review
    {
        overflow: hidden;
    }

    .sasp-problem-card mjx-container,
    .sasp-solution mjx-container,
    .sasp-intro-card mjx-container
    {
        max-width: 100%;

        overflow-x: auto;
        overflow-y: hidden;
    }

}


/* =========================================================
   REDUCED MOTION
   ========================================================= */

@media (prefers-reduced-motion: reduce)
{

    .sasp-related-card
    {
        transition: none;
    }

    .sasp-related-card:hover
    {
        transform: none;
    }

}

.sasp-graph-frac
{
    display: inline-flex;

    flex-direction: column;

    align-items: center;

    justify-content: center;

    vertical-align: middle;

    line-height: 1.05;

    margin-left: 0.15rem;
}

.sasp-graph-frac > span:first-child
{
    padding:
        0
        0.2rem
        0.08rem;

    border-bottom:
        1px solid
        currentColor;
}

.sasp-graph-frac > span:last-child
{
    padding:
        0.08rem
        0.2rem
        0;
}