/**
 * 工作表生成器 - 前端样式
 */

:root {
    --color-red-500: #d32f2f;
    --color-blue-500: #2196F3;
    --color-blue-600: #1976D2;
    --color-blue-700: #1565C0;
    --color-gray-50: #f5f5f5;
    --color-gray-300: #e0e0e0;
    --color-gray-400: #bdbdbd;
    --color-gray-500: #9e9e9e;
    --color-gray-600: #757575;
    --color-white: #ffffff;
    --color-black: #000000;
}

.worksheet-generator-wrapper {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
    background: var(--color-gray-50);
}

.worksheet-generator-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    align-items: flex-start;
}

/* 左侧预览区域 */
.worksheet-left {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.worksheet-preview {
    background: var(--color-white);
    border: 2px solid var(--color-red-500);
    border-radius: 8px;
    padding: 32px;
    min-height: 600px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    overflow-y: auto;
    position: relative;
}

.worksheet-preview .empty-state {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--color-gray-500);
    font-size: 16px;
    text-align: center;
}

/* 工作表头部 */
.worksheet-container {
    width: 100%;
}

.worksheet-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 2px solid var(--color-gray-300);
}

.worksheet-branding {
    font-weight: 700;
    font-size: 20px;
    letter-spacing: 0.5px;
}

.worksheet-branding-red {
    color: var(--color-red-500);
}

.worksheet-branding-blue {
    color: var(--color-blue-500);
}

.worksheet-title {
    font-size: 18px;
    font-weight: 700;
    text-align: right;
    color: var(--color-black);
}

.worksheet-meta {
    display: flex;
    justify-content: space-between;
    gap: 32px;
    font-size: 14px;
    color: var(--color-black);
}

.worksheet-meta-item {
    display: flex;
    align-items: center;
    gap: 8px;
}

.worksheet-meta-line {
    flex: 1;
    border-bottom: 1px solid var(--color-gray-500);
    min-width: 120px;
}

/* 工作表容器 */
.worksheet-container h1 {
    text-align: center;
    margin-bottom: 32px;
    font-size: 24px;
    font-weight: 700;
    color: var(--color-black);
}

.problems-grid {
    display: grid;
    gap: 34px;
    margin-bottom: 32px;
}

.problems-vertical {
    grid-template-columns: repeat(4, 1fr);
}

.problems-horizontal {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

/* 单个题目 */
.problem {
    display: flex;
    gap: 8px;
    align-items: flex-start;
    padding: 8px 6px;
    border: none;
    border-radius: 0;
}

.problem-number {
    font-weight: 700;
    color: var(--color-gray-600);
    min-width: 30px;
    font-size: 12px;
    margin-top: 2px;
}

.problem-content {
    flex: 1;
}

/* 竖排样式 */
.problems-vertical .problem-content {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    text-align: right;
}

.problems-vertical .problem-content div:not(.line):not(.answer-blank) {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-black);
    line-height: 1.4;
}

.problems-vertical .line {
    border-top: 2px solid var(--color-black);
    margin: 6px 0;
    width: 100%;
    height: 0;
}

.problems-vertical .answer-blank {
    min-height: 24px;
    display: block;
}

/* 竖排数字对齐细节 */
.num-top {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-black);
    text-align: right;
}

.num-bottom {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 2px;
}

.operator-left {
    color: var(--color-black);
    font-weight: 700;
    margin-right: 0px;
}

.num-value {
    font-weight: 700;
}

/* 禁用样式（Create按钮） */
.btn-disabled {
    background: var(--color-gray-300) !important;
    color: var(--color-gray-600) !important;
    cursor: not-allowed !important;
}

/* 横排样式 */
.problems-horizontal .problem-content {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
}

.problems-horizontal .problem-number {
    font-weight: 700;
    color: var(--color-gray-600);
    min-width: 30px;
    font-size: 12px;
}

.problems-horizontal .number,
.problems-horizontal .operator,
.problems-horizontal .equals {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-black);
}

.problems-horizontal .answer-blank {
    border-bottom: 2px solid var(--color-black);
    min-width: 60px;
    display: inline-block;
    height: 16px;
}

/* 答案样式 */
.problem-content .answer {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-blue-500);
    margin-top: 6px;
}

.problems-horizontal .answer {
    margin-top: 0;
    margin-left: 4px;
    text-decoration: underline;
    text-decoration-color: var(--color-blue-500);
    text-decoration-thickness: 2px;
}

/* 工作表页脚 */
.worksheet-footer {
    margin-top: 32px;
    padding-top: 16px;
    border-top: 1px solid var(--color-gray-300);
    text-align: center;
    font-size: 12px;
    color: var(--color-gray-600);
    line-height: 1.6;
}

/* 按钮样式 */
.btn {
    padding: 12px 24px;
    font-size: 14px;
    font-weight: 600;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
    text-transform: capitalize;
}

.btn:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--color-blue-500);
    color: var(--color-white);
}

.btn-primary:hover:not(:disabled) {
    background: var(--color-blue-600);
}

.btn-outline {
    background: var(--color-white);
    color: var(--color-blue-500);
    border: 2px solid var(--color-blue-500);
}

.btn-outline:hover:not(:disabled) {
    background: rgba(33, 150, 243, 0.05);
}

.button-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

/* 右侧配置面板 */
.worksheet-right {
    display: flex;
    flex-direction: column;
}

.configuration-panel {
    background: var(--color-white);
    border: 1px solid var(--color-gray-300);
    border-radius: 8px;
    padding: 32px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.configuration-panel h2 {
    margin: 0 0 24px 0;
    font-size: 24px;
    font-weight: 700;
    color: var(--color-black);
}

#config-form {
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--color-black);
    font-size: 14px;
}

.form-label-accent {
    color: var(--color-blue-500);
    font-weight: 400;
    font-size: 13px;
}

.form-group input[type="text"],
.form-group select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--color-gray-300);
    border-radius: 4px;
    font-size: 14px;
    font-family: inherit;
    box-sizing: border-box;
    transition: all 0.3s ease;
    background: var(--color-white);
    color: var(--color-black);
}

.form-group input[type="text"]:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-blue-500);
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
}

/* 高亮表单组 */
.form-group-highlight {
    background: rgba(33, 150, 243, 0.05);
    padding: 12px;
    border: 1px solid var(--color-blue-500);
    border-radius: 4px;
    margin: 0 -12px 24px -12px;
    padding: 12px;
}

.form-group-highlight label {
    color: var(--color-blue-500);
    font-weight: 600;
}

.select-wrapper {
    position: relative;
    width: 100%;
}

.select-wrapper select {
    width: 100%;
    padding-right: 36px;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    cursor: pointer;
}

.form-group-highlight .select-wrapper select {
    background: var(--color-white);
    border-color: var(--color-blue-500);
}

.select-icon {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
    color: var(--color-gray-500);
    width: 20px;
    height: 20px;
}

.select-icon-blue {
    color: var(--color-blue-500);
}

/* 复选框样式 */
.checkbox-group {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
}

.checkbox-input {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--color-blue-500);
    border-radius: 2px;
}

.checkbox-label {
    margin-bottom: 0;
    font-weight: 600;
    cursor: pointer;
    user-select: none;
}

/* 创建按钮 */
#create-btn {
    background: var(--color-blue-500);
    color: var(--color-white);
    padding: 12px 24px;
    font-size: 14px;
    font-weight: 600;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
    text-transform: capitalize;
}

#create-btn:hover {
    background: var(--color-blue-600);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .worksheet-generator-container {
        gap: 24px;
    }
    
    .problems-vertical {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 1024px) {
    .worksheet-generator-container {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .problems-vertical {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    }
    
    .worksheet-meta {
        flex-direction: column;
        gap: 12px;
    }
}

@media (max-width: 768px) {
    .worksheet-generator-wrapper {
        padding: 12px;
    }
    
    .worksheet-preview {
        padding: 16px;
        min-height: auto;
    }
    
    .configuration-panel {
        padding: 20px;
    }
    
    .problems-vertical {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }
    
    .button-group {
        grid-template-columns: 1fr;
    }
    
    .worksheet-header {
        flex-direction: column;
        gap: 12px;
    }
    
    .worksheet-title {
        text-align: left;
    }
}

@media print {
    .worksheet-generator-wrapper {
        background: transparent;
        padding: 0;
    }
    
    .worksheet-generator-container,
    .worksheet-left,
    .configuration-panel,
    .btn,
    .button-group {
        display: none !important;
    }
    
    .worksheet-preview {
        border: none;
        box-shadow: none;
        padding: 0;
        min-height: auto;
    }
    
    .worksheet-container {
        width: 100%;
    }
}