/* カード型アーカイブ */
.ba-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
    margin: 20px 0;
}
.ba-card {
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    overflow: hidden;
    background: #fff;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.ba-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.1);
}
.ba-card-img {
    background: #f7fafc;
}
.ba-card-img img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
}
.ba-card-content {
    padding: 15px;
}
.ba-card-title {
    font-size: 1.1rem;
    margin: 0 0 10px;
    line-height: 1.4;
}
.ba-card-title a {
    text-decoration: none;
    color: #2d3748;
}
.ba-card-title a:hover {
    color: #3182ce;
}
.ba-price {
    font-weight: bold;
    color: #e53e3e;
    font-size: 1.1rem;
}
.ba-end-time {
    font-size: 0.85rem;
    color: #718096;
    margin-top: 8px;
}

/* 詳細ページ */
.ba-single-container {
    background: #f7fafc;
    padding: 25px;
    border-radius: 8px;
    margin-top: 30px;
    border: 1px solid #e2e8f0;
}
.ba-single-container h3 {
    margin-top: 0;
    border-bottom: 2px solid #e2e8f0;
    padding-bottom: 10px;
    margin-bottom: 15px;
}
.ba-single-container h4 {
    margin-top: 20px;
    margin-bottom: 10px;
}
.ba-option-group {
    margin-bottom: 15px;
    background: #fff;
    padding: 15px;
    border: 1px solid #e2e8f0;
    border-radius: 4px;
}
.ba-option-group label {
    display: block;
    font-weight: bold;
    margin-bottom: 5px;
}
.ba-option-group select {
    width: 100%;
    max-width: 300px;
    padding: 8px;
    border: 1px solid #cbd5e0;
    border-radius: 4px;
}
.ba-bid-form {
    margin-top: 20px;
    background: #fff;
    padding: 20px;
    border-radius: 8px;
    border: 1px solid #e2e8f0;
}
.ba-bid-form label {
    font-weight: bold;
    display: block;
    margin-bottom: 10px;
}
.ba-bid-form input[type="number"] {
    padding: 10px;
    font-size: 1.1rem;
    width: 200px;
    margin-right: 10px;
}