* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
    padding: 10px 3px;
    height: 100vh;
    width: 100vw;
    overflow: hidden;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    border-radius: 8px;
    padding: 8px;
}

h1 {
    text-align: center;
    margin-bottom: 20px;
    color: #2c3e50;
}

.header {
    position: relative;
}

/* 模块切换器样式 */
.module-switcher select {
    appearance: none;
    -webkit-appearance: none;
    width: 150px;
    padding: 5px 35px 5px 15px;
    border: 2px solid #3498db;
    border-radius: 8px;
    background-color: #fff;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%232980b9'%3e%3cpath d='M7 10l5 5 5-5z'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 16px;
    font-size: 16px;
    color: #333;
    transition: all 0.3s ease;
    cursor: pointer;
    margin: 10px 0;
}

.module-switcher select:hover {
    border-color: #3498db;
    box-shadow: 0 2px 8px rgba(76, 175, 80, 0.2);
}

.module-switcher select:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.2);
}

/* 下拉选项样式 */
.module-switcher option {
    padding: 10px;
    background: #fff;
    color: #333;
}

.header .module-switcher {
    position: absolute;
    right: 10px;
    top: 85px;
}

.description {
    text-align: center;
    margin-bottom: 30px;
    color: #7f8c8d;
}

.problem-selector {
    background-color: #f9f9f9;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.problem-selector h3 {
    margin-bottom: 15px;
    color: #2c3e50;
    text-align: center;
}

/* 问题类型区域样式已更新，使用下拉选择框替代按钮组 */

.input-container {
    background-color: #f9f9f9;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 30px;
}

.number-inputs {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 20px;
    justify-content: center;
}

.input-group {
    display: flex;
    flex-direction: column;
}

label {
    margin-bottom: 5px;
    font-weight: bold;
    color: #2c3e50;
}

input[type="number"] {
    width: 80px;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
    text-align: center;
}

button {
    display: block;
    width: 100%;
    padding: 12px;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #2980b9;
}

.results-container {
    background-color: #f9f9f9;
    padding: 20px;
    border-radius: 8px;
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.stats {
    font-size: 14px;
    color: #7f8c8d;
}

.filter-container {
    display: flex;
    gap: 20px;
    margin-bottom: 15px;
}

.solutions {
    background-color: white;
    border: 1px solid #ddd;
    border-radius: 4px;
    padding: 15px;
    max-height: 400px;
    overflow-y: auto;
    display: flex;
    flex-wrap: wrap;
}

.solution-item {
    padding: 10px;
    border: 1px solid #eee;
    margin: 3px 0;
    display: flex;
    justify-content: space-between;
    width: 100%;
}

/* 模块样式 */
.module {
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 20px;
}

.module h2 {
    margin-top: 0;
    color: #333;
    border-bottom: 2px solid #f0f0f0;
    padding-bottom: 10px;
    margin-bottom: 20px;
}

/* 出题模块样式 */
.problem-module .problem-types,
.problem-types {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.pre-container {
    display: inline-flex;
    gap: 8px;
    align-items: center;
}

.timer-container {
    display: inline-flex;
    align-items: center;
    background-color: #f2f2f2;
    padding: 5px 10px;
    border-radius: 4px;
    width: fit-content;
    margin-right: 15px;
}

.timer-label {
    font-size: 14px;
    color: #555;
    margin-right: 5px;
}

.timer-display {
    font-family: monospace;
    font-size: 16px;
    font-weight: bold;
    color: #e74c3c;
    white-space: nowrap;
}

.timer-display.time-up {
    color: #ffffff;
    background-color: #e74c3c;
    padding: 2px 6px;
    border-radius: 4px;
    animation: blink 1s infinite;
}

@keyframes blink {
    0% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }

    100% {
        opacity: 1;
    }
}

.problem-type-select-container {
    flex: 1;
}

.problem-type-select {
    width: 100%;
    padding: 10px 35px 10px 15px;
    border: 2px solid #3498db;
    border-radius: 8px;
    background-color: #fff;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%232980b9'%3e%3cpath d='M7 10l5 5 5-5z'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 16px;
    font-size: 16px;
    color: #333;
    appearance: none;
    -webkit-appearance: none;
    transition: all 0.3s ease;
    cursor: pointer;
}

.problem-type-select:hover,
.problem-type-select:focus {
    border-color: #2980b9;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
    outline: none;
}

.generate-problem-btn {
    padding: 10px 20px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
    width: auto;
}

.generate-problem-btn:hover {
    background-color: #45a049;
    box-shadow: 0 2px 8px rgba(76, 175, 80, 0.3);
}

.problem-container {
    background-color: #f9f9f9;
    border-radius: 6px;
    padding: 15px;
}

.problem-content {
    margin-bottom: 15px;
}

.problem-text {
    font-size: 16px;
    line-height: 1.5;
    margin-bottom: 15px;
}

.problem-numbers {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin: 20px 0;
}

.problem-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: #4CAF50;
    color: white;
    border-radius: 50%;
    font-size: 18px;
    font-weight: bold;
}

.problem-answer {
    background-color: #f0f8ff;
    border-radius: 6px;
    padding: 15px;
    margin-top: 15px;
}

.answers-container {
    display: flex;
    display: flex;
    flex-wrap: wrap;
}

.answer-item {
    padding: 8px;
    width: 100%;
    margin: 3px 0;
}

.answers-container .solution-item,
.answers-container .answer-item {
    border: 1px solid #ddd;
    background: #fff;
}

.answer-group {
    display: flex;
    margin-bottom: 8px;
}

.answer-key {
    font-weight: bold;
    margin-right: 10px;
    min-width: 80px;
}

/* 计算器模块样式 */
.calculator-module .input-container {
    margin-bottom: 20px;
}

.secondary-btn {
    background-color: #2196F3;
    color: white;
    border: none;
    border-radius: 4px;
    padding: 8px 15px;
    cursor: pointer;
    transition: all 0.3s;
}

.secondary-btn:hover {
    background-color: #0b7dda;
}

.solution-expression {
    font-family: monospace;
    font-size: 16px;
    font-weight: bold;
}

.solution-flag {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: bold;
}

.flag-1 {
    background-color: #1d05f3 !important;
}

.flag-1 .solution-expression,
.flag-1 .solution-flag {
    color: #fff;
}

.flag-2 {
    background-color: #f00808 !important;
}

.flag-2 .solution-expression,
.flag-2 .solution-flag {
    color: #fff;
}


.placeholder {
    color: #95a5a6;
    text-align: center;
    padding: 20px;
}

/* 一星和二星数据表格样式 */
.flag-search-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 15px;
    margin-bottom: 20px;
    background-color: #f9f9f9;
    padding: 15px;
    border-radius: 8px;
}

.flag-search-container .search-btn {
    width: 100px;
    padding: 10px;
}

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

.search-input label {
    margin: 0;
}

.flag-data-container {
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 5px;
    margin-bottom: 20px;
    max-height: 600px;
    overflow-y: auto;
}

.flag-table {
    width: 100%;
    border-collapse: collapse;
}

.flag-table th {
    background-color: #f2f2f2;
    padding: 10px;
    text-align: center;
    border-bottom: 2px solid #ddd;
}

.flag-table td {
    padding: 5px;
    border-bottom: 1px solid #eee;
    vertical-align: top;
}

/* 历史记录模块样式 */
.history-search-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-bottom: 15px;
    padding: 15px;
    border-radius: 8px;
    background-color: #f9f9f9;
    flex-wrap: wrap;
}

.history-search-container select,
.history-search-container input {
    outline: none;
    padding: 5px 10px;
    border-radius: 4px;
    border: 2px solid #3498db;
}

.history-search-container .search-btn {
    width: auto;
    padding: 5px 15px;
}

.history-data-container {
    margin-top: 20px;
    max-height: calc(110vh - 400px);
    overflow-y: auto;
}

.history-cards-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 10px 0;
}

.history-card {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    padding: 8px;
    transition: transform 0.2s, opacity 0.3s, border-left-color 0.3s;
    margin-bottom: 5px;
    font-size: 14px;
    border: 1px solid;
}

.history-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 3px 6px rgba(0, 0, 0, 0.12);
}

.history-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
    padding-bottom: 6px;
    border-bottom: 1px solid #eee;
    font-size: 13px;
}


.history-card.favorite {
    border-left: 4px solid #ffcc00;
}

/* 确保收藏模块中的删除按钮样式一致 */
.favorites-module .history-card.deleted {
    opacity: 0.6;
    background-color: #f9f9f9;
    border-color: #ddd;
    border-left: 4px solid #e74c3c !important;
}

.history-card-type {
    font-weight: bold;
    color: #3498db;
    padding: 3px 8px;
    border-radius: 4px;
    background-color: rgba(52, 152, 219, 0.1);
}

.history-card-time {
    font-size: 0.85em;
    color: #7f8c8d;
}

.history-card-content {
    display: flex;
    flex-direction: column;
}

.history-card .problem-text {
    font-size: 14px;
    line-height: 1.4;
    margin-bottom: 5px;
}

.history-card .problem-numbers {
    display: flex;
    gap: 10px;
    margin: 5px 0;
    justify-content: center;
}

.history-card .problem-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    background-color: #4CAF50;
    border-radius: 4px;
    font-weight: bold;
    font-size: 16px;
}



.history-card-answers {
    padding-top: 8px;
    border-top: 1px dashed #eee;
}

.history-card-answers h3 {
    font-size: 14px;
    margin-bottom: 8px;
}

.history-card-answers .answers-container {
    font-size: 13px;
}

.history-card-answers .solution-item,
.history-card-answers .answer-item,
.history-card-answers .answer-group {
    margin-bottom: 5px;
    padding: 5px;
    background-color: #f9f9f9;
    border-radius: 4px;
}

.history-card-question {
    font-size: 1.1em;
    color: #2c3e50;
}

.history-card-numbers {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.history-card-solution {
    font-family: monospace;
    background-color: #f9f9f9;
    padding: 8px;
    border-radius: 4px;
    margin-top: 5px;
}

.records-stats {
    display: block;
    width: 100%;
    padding: 3px;
    /*background-color: #f5f5f5;*/
    color: #666;
    text-align: center;
    font-size: 14px;
}

/* 保留加载按钮样式用于其他地方 */
.load-more-btn {
    display: block;
    width: 100%;
    padding: 10px;
    margin-top: 5px;
    background-color: #2ecc71;
    color: #eee;
    border: 1px solid #ddd;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.load-more-btn:hover {
    color: #fff;
    background-color: #2ecc71;
}

.load-more-btn:disabled {
    color: #ddd;
    cursor: not-allowed;
}

/* 题型样式 */
.type-a {
    border-color: #3498db;
    border-left: 4px solid #3498db;
}

.type-b {
    border-color: #2ecc71;
    border-left: 4px solid #2ecc71;
}

.type-c {
    border-color: #e74c3c;
    border-left: 4px solid #e74c3c;
}

.type-d {
    border-color: #f39c12;
    border-left: 4px solid #f39c12;
}

.type-e {
    border-color: #9b59b6;
    border-left: 4px solid #9b59b6;
}

.type-unknown {
    border-color: #9b59b6;
    border-left: 4px solid #9b59b6;
}

.flag-table .placeholder {
    text-align: center;
    color: #999;
    padding: 20px;
}

.flag-table .number-cell {
    width: 100px;
    white-space: nowrap;
    font-weight: bold;
    text-align: center;
    vertical-align: middle;
}

.flag-table .expressions-cell {
    line-height: 1.5;
    display: flex;
    justify-content: center;
    align-items: center;
}

.flag-table .expressions-item {
    white-space: nowrap;
}


.flag-table .expression-item.flag-1 {
    color: #1d05f3;
    background-color: transparent !important;
}

.flag-table .expression-item.flag-2 {
    color: #f00808;
    background-color: transparent !important;
}

.hidden {
    display: none !important;
}



/* 收藏和删除操作的过渡效果 */

.flag-table .expression-container {
    margin: 5px 0;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    width: 100%;
}

.flag-table .toggle-btn {
    padding: 6px 8px;
    font-size: 14px;
    cursor: pointer;
    width: 100px;
}

.error {
    color: #e74c3c;
    text-align: center;
    padding: 10px;
    background-color: #fadbd8;
    border-radius: 4px;
    margin-top: 10px;
}

.secondary-btn {
    background-color: #95a5a6;
    color: white;
    padding: 8px 16px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.3s;
}

.secondary-btn:hover {
    background-color: #7f8c8d;
}



.icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 5px;
    border: none;
    background: transparent;
    color: #666;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.2s;
}

/* 确保按钮在不同状态下的一致性 */
.show-history-answer-btn,
.favorite-btn,
.delete-btn {
    outline: none;
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.3);
}

.show-history-answer-btn {
    color: #3498db;
}

.favorite-btn {
    color: #f39c12;
}

.delete-btn {
    color: #c0392b;
}

.delete-btn.active {
    color: #4CAF50;
}

/* 禁用状态的按钮样式 */
.favorite-btn:disabled,
.delete-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.icon-btn:hover {
    background: rgba(0, 0, 0, 0.05);
    /*color: #333;*/
}

.history-card-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.show-history-answer-btn.active {
    color: #3498db;
}

.favorite-btn.active {
    color: #f39c12;
}

/* 已删除历史卡片样式 */
.history-card.deleted {
    opacity: 0.6;
    background-color: #f9f9f9;
    border-color: #ddd;
    border-left: 4px solid #e74c3c;
}

.history-card.deleted .history-card-header {
    color: #7f8c8d;
}

.history-card.deleted .delete-btn {
    background-color: #e74c3c;
    color: white;
    border-color: #c0392b;
}

.history-card.deleted .delete-btn:hover {
    background-color: #c0392b;
}