.number-input {
    font-size: 24px;
    font-weight: 600;
    text-align: center;
    letter-spacing: 2px;
}
.quick-numbers {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 15px 0;
}
.quick-btn {
    padding: 8px 16px;
    border: 1px solid #ddd;
    background: #fff;
    border-radius: 4px;
    font-size: 13px;
    color: #666;
}
.quick-btn:hover {
    background: #f8f9fa;
    border-color: #007bff;
    color: #007bff;
}
.result-label {
    font-size: 13px;
    color: #999;
    margin-bottom: 10px;
}
.result-chinese {
    font-size: 20px;
    font-weight: 600;
    color: #333;
    line-height: 1.8;
    padding: 15px;
    background: #fff3cd;
    border-radius: 8px;
    border: 1px solid #ffeeba;
    margin-bottom: 15px;
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.result-original {
    font-size: 14px;
    color: #666;
    margin-bottom: 15px;
}
.btn-outline {
    padding: 10px 20px;
    border: 1px solid #ddd;
    background: #fff;
    border-radius: 4px;
}
.btn-outline:hover {
    background: #f8f9fa;
}
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: #999;
}
.empty-state i {
    font-size: 56px;
    margin-bottom: 15px;
    display: block;
}
.history-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 15px;
    background: #f8f9fa;
    border-radius: 6px;
    margin-bottom: 8px;
}
.history-number {
    font-family: monospace;
    font-weight: 600;
    color: #333;
    min-width: 100px;
}
.history-arrow {
    color: #007bff;
    font-weight: bold;
}
.history-chinese {
    flex: 1;
    color: #666;
    font-size: 14px;
}
.empty-history {
    text-align: center;
    color: #999;
    padding: 20px;
}