/* --- Grid Architecture --- */
.challenges-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
    padding:  0;
}

.challenge-card {
    background: #ffffff;
    border: 1px solid #f1f5f9;
    border-radius: 24px;
    padding: 40px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

/* --- Numbered Index Box --- */
.challenge-index {
    width: 48px;
    height: 48px;
    background: #fff;
    border: 1.5px solid #e2e8f0;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 900;
    color: #000;
    margin-bottom: 32px;
}

/* --- Typography Reset --- */
.challenge-h3 { 
    margin: 0 !important; 
    font-size: 32px; 
    font-weight: 850; 
    color: #1e293b; 
    line-height: 1.2;
    letter-spacing: -0.5px;
}

.challenge-p { 
    margin: 20px 0 0 0 !important; 
    font-size: 16px; 
    color: #64748b; 
    line-height: 1.6; 
}