```css
/* =========================
   GRID
========================= */

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 30px;
    margin-top: 35px;
}

/* =========================
   CARD
========================= */

.card {
    background: #171a21;
    border-radius: 24px;
    overflow: hidden;
    border: 1px solid rgba(255,255,255,0.08);
    transition: all .35s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
    box-shadow: 0 8px 25px rgba(0,0,0,.25);
}

.card:hover {
    transform: translateY(-8px);
    border-color: rgba(0,255,147,.35);
    box-shadow:
        0 20px 40px rgba(0,0,0,.35),
        0 0 25px rgba(0,255,147,.15);
}

/* =========================
   IMAGE
========================= */

.card-image {
    height: 260px;
    position: relative;
    background-size: cover;
    background-position: center;
    overflow: hidden;
}

.card-image::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to top,
        rgba(0,0,0,.85),
        rgba(0,0,0,.15)
    );
}

.card-image-content {
    position: absolute;
    left: 20px;
    right: 20px;
    bottom: 20px;
    z-index: 3;
}

.card-image-title {
    font-size: 15px;
    font-weight: 600;
    color: rgba(255,255,255,.8);
    margin-bottom: 8px;
    letter-spacing: 1px;
}

.card-image-amount {
    font-size: 38px;
    font-weight: 900;
    color: #fff;
    line-height: 1;
}

.card-image-currency {
    color: #00ff93;
}

/* =========================
   BADGES
========================= */

.card-discount-badge {
    position: absolute;
    top: 18px;
    right: 18px;
    z-index: 3;
    background: linear-gradient(
        135deg,
        #00ff93,
        #00d97d
    );
    color: #111;
    font-size: 14px;
    font-weight: 800;
    padding: 8px 12px;
    border-radius: 12px;
}

.card-badge-top {
    position: absolute;
    top: 18px;
    left: 18px;
    right: 18px;
    z-index: 3;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* =========================
   CONTENT
========================= */

.card-bottom {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.card-prices {
    display: flex;
    align-items: center;
    gap: 12px;
}

.price-old {
    color: #8b8b8b;
    text-decoration: line-through;
    font-size: 15px;
}

.price {
    color: #00ff93;
    font-size: 32px;
    font-weight: 900;
    line-height: 1;
}

.card-profit {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 16px;
    border-radius: 14px;
    background: rgba(0,255,147,.08);
    border: 1px solid rgba(0,255,147,.15);
    color: #fff;
    font-weight: 600;
}

.profit-icon {
    font-size: 18px;
}

/* =========================
   BUTTON
========================= */

.btn-buy {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 16px;
    border-radius: 14px;
    text-decoration: none;
    font-size: 16px;
    font-weight: 800;
    background: linear-gradient(
        135deg,
        #00ff93,
        #00d97d
    );
    color: #111;
    transition: all .25s ease;
}

.btn-buy:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 24px rgba(0,255,147,.3);
}

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

@media (max-width: 768px) {

    .cards-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .card-image {
        height: 220px;
    }

    .card-image-amount {
        font-size: 30px;
    }

    .price {
        font-size: 28px;
    }

    .card-bottom {
        padding: 20px;
    }
}
```