/* === 列表區塊樣式 === */
.list-section {
    margin-bottom: 2rem;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    overflow: hidden;
}

.list-section-header {
    background: #006670;
    color: white;
    padding: 1rem 1.5rem;
    font-size: 1.25rem;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.list-section-header .icon {
    width: 24px;
    height: 24px;
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

.list-section-header .icon-basis {
    background-image: url('../images/vocabulary/icon_tag.svg');
    filter: brightness(0) invert(1);
}

.list-section-header .icon-vocabulary {
    background-image: url('../images/vocabulary/icon_book.svg');
    filter: brightness(0) invert(1);
}

.list-section-header .icon-sentence {
    background-image: url('../images/vocabulary/icon_girl.svg');
    filter: brightness(0) invert(1);
}

.list-section-content {
    padding: 0;
}

.list-section .list {
    margin: 0;
}

.empty-state {
    text-align: center;
    padding: 3rem 1.5rem;
    color: #666;
    font-size: 1.1rem;
}

.empty-state .icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.3;
}