body {
    font-family: 'Noto Serif JP', serif;
    margin: 0;
    padding: 0;
    background: linear-gradient(to bottom, #fdfbff, #c2e9fb); /* ホワイトデー風に淡いブルー */
    color: #555;
}

header {
    background-color: #a2d2ff; /* 淡いブルー */
    color: #151763;
    text-align: center;
    padding: 2em 0;
   background-image: url('header.jpg'); /* ホワイトデー用のヘッダー画像 */
    background-size: cover;
    background-position: center;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 0.5rem;
}

header p {
    margin: 0;
}

main {
    padding: 20px;
}

.category {
    background: #fff; /* 真っ白な背景 */
    margin-bottom: 20px;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.category h2 {
    border-bottom: 2px solid #a2d2ff;
    padding-bottom: 10px;
    margin-bottom: 10px;
    font-size: 1.8em;
    color: #4682b4;
}

.castella_title {
    color: #5c85d6; /* 落ち着いたブルー */
}

.snowball_title {
    color: #d48cff; /* 可愛らしいラベンダー */
}

.category_text {
    font-size: 0.9em;
    margin-bottom: 1rem;
}

.product-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
}

.product-item {
    display: flex;
    align-items: center;
    width: 90%;
    max-width: 800px;
    margin: 20px 0;
    padding: 1rem;
}

.product-item img {
    max-width: 400px;
    height: auto;
    margin-right: 20px;
    border-radius: 8px;
    filter: drop-shadow(0 0 10px rgba(0, 0, 0, 0.1));
}

.product-info {
    flex: 1;
    text-align: center;
}

.product-info h3 {
    margin-bottom: 0.5rem;
    font-size: 1.3em;
}

.product-info p {
    font-size: 0.9em;
    margin-bottom: 10px;
}

.price-and-buy {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.price-and-buy p {
    margin: 0.3em 0;
    font-size: 1.2em;
}

.price-and-buy a {
    display: inline-block;
    background-color: #5c85d6; /* ホワイトデーらしいブルー */
    color: white;
    padding: 10px 18px;
    text-decoration: none;
    border-radius: 25px;
    transition: transform 0.3s ease, background-color 0.3s ease;
    font-size: 0.85em;
}

.price-and-buy a:hover {
    background-color: #4682b4;
    transform: scale(1.05);
}

@media (max-width: 768px) {
    .product-item {
        flex-direction: column;
        text-align: center;
    }

    .product-item img {
        margin-bottom: 10px;
        max-width: 90%;
    }

    .price-and-buy {
        align-items: center;
    }
}

footer {
    text-align: center;
    padding: 1em 0;
    background-color: #a2d2ff;
    color: white;
}