body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 16px; /* Added site-wide padding */
    background-color: #f4f4f4;
}

h1, h3 {
    text-align: center;
    margin: 20px 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.button-container {
    display: flex;
    justify-content: center;
    margin: 20px 0;
    gap: 16px; /* Added gap for button spacing */
    flex-wrap: wrap; /* Allow wrapping on small screens */
}

.button {
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 5px;
    padding: 15px 30px;
    margin: 0; /* Remove margin, use gap in container */
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s;
    text-align: center;
    min-width: 160px;
    box-sizing: border-box;
}

.button:hover,
.button:focus {
    background-color: #0056b3;
    outline: none;
}

.products {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
    padding: 10px;
}

.product {
    background-color: white;
    border: 1px solid #ddd;
    border-radius: 5px;
    padding: 10px;
    text-align: center;
    box-sizing: border-box;
    margin: 0;
}

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

@media (max-width: 900px) {
    .container {
        padding: 10px;
    }
    .products {
        gap: 12px;
    }
}

@media (max-width: 600px) {
    .button-container {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
    }
    .button {
        width: 100%;
        min-width: 0;
        font-size: 18px;
        padding: 16px 0;
    }
    .products {
        grid-template-columns: 1fr;
        gap: 10px;
        padding: 5px;
    }
    h1, h3 {
        margin: 16px 0;
        font-size: 1.3em;
    }
    .container {
        padding: 5px;
    }
}

@media (max-width: 400px) {
    h1, h3 {
        font-size: 1em;
        margin: 10px 0;
    }
    .button {
        font-size: 16px;
        padding: 12px 0;
    }
}