body {
    font-family: 'Roboto', sans-serif;
    padding: 20px;
    margin: 0;
    background-color: #f4f4f4;
    color: #333;
}

h1, h4 {
    color: #333;
    margin: 0 0 10px;
}

.p-price {
    font-size: 1.5em;
    font-weight: 700;
    color: #4CAF50;
    margin-bottom: 20px;
}

.warning {
    color: red;
    font-size: 0.9em;
}

select, input {
    font-size: 16px;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    margin-bottom: 10px;
    width: 100%;
    box-sizing: border-box;
}

.small-img-group {
    display: flex;
    justify-content: space-between;
}

.small-img-col {
    flex-basis: 24%;
    cursor: pointer;
}

.small-img-col:hover img {
    opacity: 0.7;
}

.product {
    cursor: pointer;
    margin-bottom: 2rem;
}

.product img {
    width: 100%;
    height: auto;
    box-sizing: border-box;
    object-fit: cover;
    transition: 0.3s all;
}

.product:hover img {
    opacity: 0.7;
}

.product .buy-btn {
    background: var(--main-color);
    transform: translateY(20px);
    opacity: 0;
    border-radius: 0.3rem;
    transition: 0.3s all;
}

.product:hover .buy-btn {
    transform: translateY(0px);
    opacity: 1;
}

.product .buy-btn:hover {
    background-color: var(--main-color-btn-hover);
}