CSS
/* css/style.css */

/* Global Mobile-First Styles (Default for Smartphones) */
body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 10px;
    background-color: #f4f4f4;
}

.coupon-card {
    background: #ffffff;
    border-radius: 8px;
    margin-bottom: 15px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    padding: 15px;
}

.coupon-image {
    width: 100%;
    max-width: 100%;
    height: auto;
    border-radius: 4px;
}

/* Tablet Screens (Widths above 600px) */
@media only screen and (min-width: 600px) {
    .coupon-container {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
}

/* Desktop Screens (Widths above 1024px) */
@media only screen and (min-width: 1024px) {
    .coupon-container {
        grid-template-columns: repeat(3, 1fr);
        max-width: 1200px;
        margin: 0 auto;
    }
}