/* ==========================================================
   Problems
   ========================================================== */

.section{
    padding:5rem 0;
}

.section-heading{
    max-width:760px;
    margin:0 auto 3.5rem;
    text-align:center;
}

.section-tag{
    display:inline-block;
    margin-bottom:1rem;
    padding:.45rem .9rem;
    border-radius:999px;
    background:#dbeafe;
    color:#0369a1;
    font-weight:700;
}

.section-heading h2{
    margin:0 0 1rem;
    font-size:2.4rem;
    line-height:1.2;
}

.section-heading p{
    margin:0;
    color:#64748b;
    font-size:1.1rem;
}

.problem-grid{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:1.75rem;
}

.problem-card{
    background:#fff;
    padding:2rem;
    border:1px solid #e2e8f0;
    border-radius:20px;
    box-shadow:0 12px 35px rgba(15,23,42,.06);
    transition:transform .25s ease, box-shadow .25s ease;
}

.problem-card:hover{
    transform:translateY(-8px);
    box-shadow:0 24px 50px rgba(15,23,42,.12);
}

.problem-card h3{
    margin:0 0 .9rem;
    font-size:1.25rem;
    line-height:1.3;
}

.problem-card p{
    margin:0;
    color:#64748b;
}

@media (max-width:900px){

    .problem-grid{
        grid-template-columns:1fr;
    }

}