/* 增强样式 - 现代化界面、专业数据表格、公式显示和虚拟键盘 */

/* 全局样式增强 */
:root {
    --primary-color: #4a6cf7;
    --primary-hover: #3a5ce4;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --border-color: #e0e0e0;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s ease;
    --border-radius: 6px;
}

body {
    background-color: #f8f9fc;
    color: #333;
    line-height: 1.6;
    font-family: 'Microsoft YaHei', 'PingFang SC', 'Segoe UI', Arial, sans-serif;
}

.container {
    max-width: 1200px;
    margin: 30px auto;
    padding: 25px;
    background-color: #fff;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

h1 {
    text-align: center;
    margin-bottom: 25px;
    color: #2c3e50;
    font-weight: 600;
    position: relative;
    padding-bottom: 10px;
}

h1:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 3px;
}

/* 标签页样式增强 */
.tabs {
    display: flex;
    margin-bottom: 25px;
    border-bottom: 1px solid var(--border-color);
    overflow-x: auto;
    scrollbar-width: thin;
    position: relative;
}

.tabs::-webkit-scrollbar {
    height: 4px;
}

.tabs::-webkit-scrollbar-thumb {
    background-color: var(--secondary-color);
    border-radius: 4px;
}

.tab-btn {
    padding: 12px 24px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    color: var(--secondary-color);
    transition: var(--transition);
    position: relative;
    white-space: nowrap;
}

.tab-btn:hover {
    color: var(--primary-color);
}

.tab-btn.active {
    color: var(--primary-color);
    font-weight: 600;
}

.tab-btn.active:after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--primary-color);
    border-radius: 3px 3px 0 0;
    transition: var(--transition);
}

.tab-pane {
    display: none;
    padding: 20px 0;
    animation: fadeIn 0.3s ease-in-out;
}

.tab-pane.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 输入组样式增强 */
.input-group {
    margin-bottom: 20px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
}

label {
    font-weight: 500;
    color: #444;
    margin-right: 10px;
}

input[type="text"],
input[type="number"],
select,
textarea {
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 14px;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    width: 220px;
}

input[type="text"]:focus,
input[type="number"]:focus,
select:focus,
textarea:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(74, 108, 247, 0.15);
}

textarea {
    width: 100%;
    resize: vertical;
    min-height: 120px;
}

button {
    padding: 10px 18px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

button:hover {
    background-color: var(--primary-hover);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

button:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.primary-btn {
    background-color: var(--primary-color);
    padding: 12px 24px;
    font-size: 16px;
    font-weight: 500;
    letter-spacing: 0.5px;
}

/* 专业数据表格样式 */
.table-container {
    max-height: 350px;
    overflow-y: auto;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    scrollbar-width: thin;
}

/* 数据输入切换样式 */
.input-mode-toggle {
    display: flex;
    margin-bottom: 15px;
    background-color: #f0f0f0;
    border-radius: var(--border-radius);
    padding: 3px;
    width: fit-content;
}

.input-mode-toggle button {
    background: none;
    border: none;
    padding: 8px 16px;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 14px;
    color: var(--secondary-color);
    transition: var(--transition);
    box-shadow: none;
}

.input-mode-toggle button.active {
    background-color: white;
    color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.input-mode-toggle button:hover:not(.active) {
    background-color: rgba(255, 255, 255, 0.5);
}

.input-mode {
    display: none;
}

.input-mode.active {
    display: block;
    animation: fadeIn 0.3s ease-in-out;
}

.csv-input-container {
    margin-bottom: 15px;
}

.table-container::-webkit-scrollbar {
    width: 6px;
}

.table-container::-webkit-scrollbar-thumb {
    background-color: var(--secondary-color);
    border-radius: 3px;
}

.professional-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
    box-shadow: none;
}

.professional-table thead th {
    background-color: #f8f9fa;
    color: #444;
    font-weight: 600;
    text-align: center;
    padding: 12px;
    border: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 10;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.professional-table th.sortable {
    cursor: pointer;
    user-select: none;
}

.professional-table th.sortable:hover {
    background-color: #eef1f6;
}

.professional-table th.sortable::after {
    content: '⇅';
    margin-left: 5px;
    font-size: 12px;
    opacity: 0.5;
    transition: var(--transition);
}

.professional-table th.sorted-asc::after {
    content: '↑';
    opacity: 1;
    color: var(--primary-color);
}

.professional-table th.sorted-desc::after {
    content: '↓';
    opacity: 1;
    color: var(--primary-color);
}

.professional-table tbody tr {
    transition: var(--transition);
}

.professional-table tbody tr:nth-child(even) {
    background-color: #f9fafc;
}

.professional-table tbody tr:hover {
    background-color: #f0f7ff;
}

.professional-table td {
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    text-align: right;
    transition: var(--transition);
}

.professional-table input {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    text-align: right;
    transition: var(--transition);
}

.professional-table input:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(74, 108, 247, 0.15);
}

.table-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 15px 0;
    flex-wrap: wrap;
    gap: 10px;
}

.table-actions button {
    margin-right: 8px;
}

.table-pagination {
    display: flex;
    align-items: center;
}

.table-pagination button {
    padding: 6px 10px;
    margin: 0 3px;
    background-color: #f0f0f0;
    border: 1px solid #ddd;
    border-radius: 4px;
    cursor: pointer;
    box-shadow: none;
}

.table-pagination button:hover {
    background-color: #e0e0e0;
    box-shadow: var(--shadow-sm);
}

.table-pagination button.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.remove-row {
    background-color: var(--danger-color);
    padding: 6px 12px;
    font-size: 13px;
}

.remove-row:hover {
    background-color: #c82333;
}

/* 结果区域样式增强 */
.results-container {
    margin-top: 35px;
    display: flex;
    flex-wrap: wrap;
    gap: 25px;
}

.plot-container {
    flex: 1;
    min-width: 300px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 15px;
    background-color: #fff;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.plot-container:hover {
    box-shadow: var(--shadow-md);
}

#plot-area {
    width: 100%;
    height: 400px;
    border-radius: 4px;
    overflow: hidden;
}

.equation-container {
    flex: 1;
    min-width: 300px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 20px;
    background-color: #fff;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.equation-container:hover {
    box-shadow: var(--shadow-md);
}

.equation-container h3 {
    margin-bottom: 20px;
    color: #2c3e50;
    font-weight: 600;
    position: relative;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
}

/* 数学公式显示样式 */
.math-container {
    padding: 20px;
    background-color: #f9fafc;
    border-radius: var(--border-radius);
    margin: 15px 0;
    overflow-x: auto;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.equation-display {
    font-size: 18px;
    line-height: 1.6;
    text-align: center;
    padding: 15px;
    min-height: 60px;
}

.stats-display {
    margin-top: 25px;
    padding: 18px;
    background-color: #f8f9fc;
    border-radius: var(--border-radius);
    border-left: 4px solid var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.stats-display h4 {
    margin-bottom: 12px;
    color: #2c3e50;
    font-weight: 600;
}

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

.stats-display table th,
.stats-display table td {
    padding: 10px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.stats-display table th {
    font-weight: 600;
    color: #444;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 15px;
        margin: 15px auto;
    }

    .input-group {
        flex-direction: column;
        align-items: flex-start;
    }

    input[type="text"],
    input[type="number"],
    select {
        width: 100%;
    }

    .results-container {
        flex-direction: column;
    }

    .plot-container,
    .equation-container {
        min-width: 100%;
    }

    .tab-btn {
        padding: 10px 15px;
        font-size: 14px;
    }
}

/* 虚拟键盘样式 */
.math-keyboard {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: #f8f9fa;
    border-top: 1px solid var(--border-color);
    padding: 15px;
    display: none;
    z-index: 1000;
    box-shadow: 0 -4px 10px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
    max-height: 50vh;
    overflow-y: auto;
    transform: translateY(100%);
}

.math-keyboard.active {
    display: block;
    transform: translateY(0);
}

@keyframes slideUp {
    from { transform: translateY(100%); }
    to { transform: translateY(0); }
}

.keyboard-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    max-width: 800px;
    margin: 0 auto;
}

.keyboard-row {
    display: flex;
    width: 100%;
    margin-bottom: 8px;
}

.keyboard-key {
    flex: 1;
    min-width: 40px;
    height: 45px;
    margin: 3px;
    background-color: white;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 16px;
    user-select: none;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.keyboard-key:hover {
    background-color: #f0f7ff;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.keyboard-key:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.keyboard-key.function {
    background-color: #eef1f6;
    font-weight: 500;
}

.keyboard-key.wide {
    flex: 2;
}

.keyboard-key.special {
    background-color: #e8f0fe;
    color: var(--primary-color);
    font-weight: 500;
}

.keyboard-close {
    position: absolute;
    top: 10px;
    right: 10px;
    background-color: var(--danger-color);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 18px;
    cursor: pointer;
    padding: 5px 10px;
    box-shadow: var(--shadow-sm);
    z-index: 1010;
    display: flex;
    align-items: center;
    justify-content: center;
}

.keyboard-close:hover {
    background-color: #c82333;
    box-shadow: var(--shadow-md);
}

.keyboard-toggle {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 24px;
    cursor: pointer;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    z-index: 999;
    transition: var(--transition);
}

.keyboard-toggle.active {
    background-color: var(--success-color);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.keyboard-toggle:hover {
    background-color: var(--primary-hover);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.keyboard-panel {
    display: none;
}

.keyboard-panel.active {
    display: block;
}

@media (max-width: 768px) {
    .math-keyboard {
        max-height: 70vh;
    }

    .keyboard-container {
        max-width: 100%;
    }

    .keyboard-key {
        min-width: 30px;
        height: 40px;
        font-size: 14px;
    }
}

.keyboard-tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 10px;
    padding-bottom: 5px;
    overflow-x: auto;
}

.keyboard-tab {
    padding: 8px 15px;
    margin-right: 5px;
    cursor: pointer;
    border-radius: 4px 4px 0 0;
    background-color: #f0f0f0;
    transition: var(--transition);
}

.keyboard-tab:hover {
    background-color: #e0e0e0;
}

.keyboard-tab.active {
    background-color: var(--primary-color);
    color: white;
}