body {
    font-family: Arial, Helvetica, sans-serif;
    background-color: #f0f8ff;
    padding: 32px 16px;
    margin: 0;
}

.cards-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 24px;
    max-width: 960px;
    margin: 0 auto;
}

.card {
    background: #ffffff;
    border-radius: 16px;
    padding: 24px 20px;
    flex: 1 1 240px;
    max-width: 280px;
    box-shadow: 0 5px 16px rgba(0,0,0,0.08);
    border-top: 5px solid;
}

.card h2 {
    font-size: 1.05rem;
    margin: 0 0 12px 0;
    color: #2c3e50;
    font-weight: 700;
}

.card p {
    font-size: 0.85rem;
    line-height: 1.5;
    color: #546e7a;
    margin: 0;
}

.card-1 { border-color: #4fc3f7; }
.card-1 h2 { color: #0288d1; }

.card-2 { border-color: #ffb74d; }
.card-2 h2 { color: #f57c00; }

.card-3 { border-color: #81c784; }
.card-3 h2 { color: #388e3c; }

@media (max-width: 768px) {
    .cards-container {
        flex-direction: column;
        align-items: center;
    }

    .card {
        max-width: 100%;
    }
}