.word-item-mastered { color: #16a34a; }
.word-item-in-progress { color: #f59e0b; }
.meaning-item-mastered { color: #16a34a; text-decoration: line-through; }

.cloze-option-btn {
    background-color: white;
    border: 1px solid #cbd5e1;
    transition: all 0.2s;
}
.cloze-option-btn:hover {
    background-color: #f1f5f9;
    border-color: #3b82f6;
}
.cloze-option-btn.correct {
    background-color: #dcfce7;
    border-color: #22c55e;
    color: #166534;
}
.cloze-option-btn.incorrect {
    background-color: #fee2e2;
    border-color: #ef4444;
    color: #991b1b;
}

/* 音标和发音按钮样式 */
.phonetic-text {
    font-size: 1.1rem;
    color: #64748b; /* slate-500 */
}

.audio-btn {
    cursor: pointer;
    color: #64748b; /* slate-500 */
    transition: color 0.2s;
    background: none;
    border: none;
    padding: 0;
    display: flex;
    align-items: center;
}

.audio-btn:hover {
    color: #3b82f6; /* blue-600 */
}

/* 词表卡片样式 */
.wordlist-card {
    position: relative;
    overflow: hidden;
}

.wordlist-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #3b82f6, #8b5cf6, #06b6d4);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.wordlist-card:hover::before {
    transform: scaleX(1);
}

.line-clamp-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .wordlist-card {
        padding: 1rem;
    }

    /* 当单词列表为空时，在移动端减小其高度 */
    #word-list-container:has(> p:only-child) {
        height: auto;
        min-height: 5rem; /* 保持一个最小高度 */
    }
}

/* 生词本样式 */
.vocab-item .vocab-delete-btn {
    transition: opacity 0.2s ease-in-out, background-color 0.2s;
}