/* 口算生成器专用样式 */
.kousuan-calculator {
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    margin-bottom: 30px;
    padding: 20px;
}

.ks-options {
    display: grid;
    gap: 15px;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    margin-bottom: 20px;
}

.ks-form-group {
    margin-bottom: 15px;
}

.ks-form-label {
    color: #333;
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
}

.ks-form-control {
    background-color: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 6px;
    font-size: 14px;
    outline: none;
    padding: 10px 15px;
    transition: all .3s;
    width: 100%;
}

.ks-form-control:focus {
    border-color: #4a6bff;
    box-shadow: 0 0 0 3px rgba(74, 107, 255, .15);
}

.ks-checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.ks-checkbox-label {
    align-items: center;
    cursor: pointer;
    display: flex;
    margin-right: 15px;
    user-select: none;
}

.ks-checkbox-label input[type=checkbox] {
    accent-color: #4a6bff;
    height: 16px;
    margin-right: 5px;
    width: 16px;
}

.ks-input-row {
    align-items: center;
    display: flex;
    gap: 10px;
}

.ks-range-field {
    align-items: center;
    display: flex;
    gap: 10px;
}

/* 生成按钮行样式 */
.ks-generate-button-row {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
    margin-top: 10px;
}

.ks-generate-button-row .btn-lg {
    font-size: 16px;
    padding: 10px 30px;
}

/* 按钮样式 */
.button-group {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
    margin-top: 20px;
}

.btn-primary {
    background-color: #4a6bff;
    border-color: #4a6bff;
}

.btn-primary:hover {
    background-color: #3a5bef;
    border-color: #3a5bef;
}

.btn-success {
    background-color: #4a6bff;
    border-color: #4a6bff;
}

.btn-success:hover {
    background-color: #3a5bef;
    border-color: #3a5bef;
}

.btn-warning {
    background-color: #4a6bff;
    border-color: #4a6bff;
    color: #fff;
}

.btn-warning:hover {
    background-color: #3a5bef;
    border-color: #3a5bef;
    color: #fff;
}

/* 题目和答案区域 */
.questions {
    display: grid;
    gap: 15px;
    grid-template-columns: repeat(4, 1fr);
    margin-bottom: 30px;
}

.question-item {
    background-color: #f9f9f9;
    border-radius: 6px;
    padding: 10px;
    text-align: center;
}

.daan {
    margin-top: 30px;
}

.answers h3 {
    color: #4a6bff;
    margin-bottom: 10px;
}

/* 打印预览样式 */
.print-preview {
    background-color: rgba(0, 0, 0, 0.8);
    display: none;
    height: 100%;
    left: 0;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
}

.print-container {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.3);
    margin: 30px auto;
    max-width: 800px;
    padding: 30px;
}

.print-header {
    margin-bottom: 30px;
    text-align: center;
}

.print-title {
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 15px;
}

.print-info {
    display: flex;
    justify-content: space-around;
}

.print-questions {
    display: grid;
    gap: 15px;
    grid-template-columns: repeat(4, 1fr);
}

.print-question {
    padding: 10px;
}