.breadcrumb {
    padding: 0.75rem 1rem;
    margin: 1rem 0 2rem;
    background: linear-gradient(to right, #ffffff, #f8f9fa);
    border-radius: 0.5rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    transition: box-shadow 0.3s ease;
    width: min(92%, 720px);
    margin: 2rem auto;
    position: relative;
}

.breadcrumb:hover {
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.breadcrumb__list {
    display: flex;
    flex-wrap: wrap;
    padding: 0;
    margin: 0;
    list-style: none;
    align-items: center;
    gap: 0.25rem;
}

.breadcrumb__item {
    display: flex;
    align-items: center;
    min-width: 0; /* Flexboxでの省略表示のため */
}

.breadcrumb__separator {
    margin: 0 0.5rem;
    color: #9ca3af;
    font-size: 0.75rem;
    flex-shrink: 0; /* セパレータは縮小しない */
}

.breadcrumb__link {
    display: flex;
    align-items: center;
    color: #3b82f6;
    text-decoration: none;
    padding: 0.375rem 0.75rem;
    border-radius: 0.25rem;
    transition: all 0.2s ease-in-out;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 100%;
}

.breadcrumb__link:hover {
    color: #2563eb;
    background-color: rgba(59, 130, 246, 0.1);
    text-decoration: none;
}

.breadcrumb__current {
    display: flex;
    align-items: center;
    color: #4b5563;
    padding: 0.375rem 0.75rem;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.5;
    flex: 1;
    min-width: 0;
}

.breadcrumb__icon {
    margin-right: 0.5rem;
    font-size: 0.875rem;
    flex-shrink: 0; /* アイコンは縮小しない */
}

@media (max-width: 768px) {
    .breadcrumb {
        margin: 0.5rem 0 1.5rem;
        padding: 0.5rem 0.75rem;
    }

    .breadcrumb__list {
        gap: 0.125rem;
    }

    .breadcrumb__link,
    .breadcrumb__current {
        padding: 0.25rem 0.5rem;
        font-size: 0.875rem;
    }

    .breadcrumb__separator {
        margin: 0 0.25rem;
    }

    .breadcrumb__icon {
        margin-right: 0.375rem;
    }
}