* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    background-color: #f5f5f5;
    color: #333;
}

header {
    background-color: #4CAF50;
    padding: 1rem;
    display: flex;
    justify-content: center;
    align-items: center;
}

header form {
    display: flex;
}

header input[type="text"] {
    padding: 0.5rem;
    font-size: 1rem;
    border: 1px solid #ddd;
    border-radius: 4px 0 0 4px;
}

header button {
    padding: 0.5rem 1rem;
    font-size: 1rem;
    border: none;
    background-color: #333;
    color: white;
    border-radius: 0 4px 4px 0;
    cursor: pointer;
}

header button:hover {
    background-color: #555;
}

aside {
    width: 20%;
    background-color: #333;
    color: white;
    padding: 1rem;
    position: fixed;
    height: 100%;
    overflow-y: auto;
}

aside h2 {
    margin-bottom: 1rem;
}

aside button {
    width: 100%;
    padding: 0.5rem;
    font-size: 1rem;
    border: none;
    background-color: #4CAF50;
    color: white;
    cursor: pointer;
    margin-bottom: 0.5rem;
    border-radius: 4px;
}

aside button:hover {
    background-color: #45a049;
}

main {
    margin-left: 22%;
    padding: 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

main div {
    background-color: white;
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 1rem;
    width: calc(33.333% - 2rem);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    display: flex;
    flex-direction: column;
    align-items: center;
}

main img {
    max-width: 100%;
    border-radius: 8px;
}

main h4, main h3, main p {
    margin: 0.5rem 0;
    text-align: center;
}

main button {
    padding: 0.5rem 1rem;
    font-size: 1rem;
    border: none;
    background-color: #4CAF50;
    color: white;
    border-radius: 4px;
    cursor: pointer;
}

main button:hover {
    background-color: #45a049;
}


@media (max-width: 768px) {
    aside {
        width: 100%;
        height: auto;
        position: relative;
        margin-bottom: 1rem;
    }

    main {
        margin-left: 0;
    }

    main div {
        width: calc(50% - 2rem);
    }
}

@media (max-width: 480px) {
    main div {
        width: calc(100% - 2rem);
    }
}

#product-details {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 2rem;
}

#product-details div {
    background-color: white;
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 2rem;
    width: 80%;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    display: flex;
    flex-direction: column;
    align-items: center;
}

#product-details img {
    max-width: 100%;
    border-radius: 8px;
}

#product-details h4, #product-details h3, #product-details p {
    margin: 1rem 0;
    text-align: center;
}

@media (max-width: 768px) {
    #product-details div {
        width: 100%;
    }
}