/* styles.css */
:root {
    --primary-color: #3498db;
    --secondary-color: #2ecc71;
    --dark-color: #2c3e50;
    --light-color: #ecf0f1;
    --danger-color: #e74c3c;
    --warning-color: #f39c12;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f7fa;
    color: #333;
    line-height: 1.6;
}

.app-container {
    display: flex;
    min-height: 100vh;
}

/* 侧边栏样式 */
.sidebar {
    width: 250px;
    background-color: var(--dark-color);
    color: white;
    padding: 20px 0;
    height: 100vh;
    position: sticky;
    top: 0;
    overflow-y: auto;
}

.sidebar h2 {
    padding: 0 20px 20px;
    font-size: 1.3rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.menu-category {
    padding: 15px 20px 5px;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.6);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.menu-btn {
    display: flex;
    align-items: center;
    width: 100%;
    padding: 12px 20px;
    background: transparent;
    border: none;
    color: white;
    text-align: left;
    cursor: pointer;
    transition: all 0.3s;
}

.menu-btn .icon {
    margin-right: 10px;
    font-size: 1.1rem;
}

.menu-btn:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.menu-btn.active {
    background-color: var(--primary-color);
    border-left: 4px solid white;
}

/* 主内容区域 */
.main-content {
    flex: 1;
    padding: 30px;
    overflow-y: auto;
}

.calculator-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

.calculator-content.active {
    display: block;
}

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

/* 标准计算器样式 */
.calculator-content h2 {
    margin-bottom: 20px;
    color: var(--dark-color);
    display: flex;
    align-items: center;
}

.calculator-content h2 .icon {
    margin-right: 10px;
}

.display {
    margin-bottom: 20px;
}

.display input {
    width: 100%;
    padding: 15px;
    font-size: 1.5rem;
    text-align: right;
    border: 1px solid #ddd;
    border-radius: 5px;
    background-color: #f8f9fa;
}

.buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
}

.btn {
    padding: 15px;
    font-size: 1.2rem;
    border: none;
    border-radius: 8px;
    background-color: white;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.btn:hover {
    background-color: #e9ecef;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.operator {
    background-color: var(--primary-color);
    color: white;
}

.operator:hover {
    background-color: #2980b9;
}

/* 木材计算器样式 */
.wood-container {
    display: flex;
    gap: 30px;
}

.wood-form {
    flex: 1;
    max-width: 400px;
}

.wood-visualization {
    flex: 1;
    background-color: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

#wood-chart {
    width: 100%;
    height: 300px;
    margin: 20px 0;
}

.dimension-labels {
    display: flex;
    flex-direction: column;
    gap: 8px;
    font-size: 0.9rem;
    color: #555;
}

.hidden {
    display: none;
}

/* 表单通用样式 */
.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 600;
    color: #555;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
}

.form-group textarea {
    min-height: 80px;
    resize: vertical;
}

.calculate-btn {
    width: 100%;
    padding: 12px;
    background-color: var(--secondary-color);
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    margin-top: 10px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.calculate-btn:hover {
    background-color: #27ae60;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.calculate-btn.secondary {
    background-color: var(--primary-color);
    margin-top: 5px;
}

.calculate-btn.secondary:hover {
    background-color: #2980b9;
}

.result-display {
    margin-top: 20px;
    padding: 15px;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

.result-display h3 {
    margin-bottom: 10px;
    color: var(--dark-color);
}

.result-display p {
    margin: 8px 0;
    font-size: 1rem;
}

.result-display span {
    font-weight: 600;
    color: var(--primary-color);
}

/* 自定义公式样式 */
.formula-container {
    display: flex;
    gap: 30px;
}

.formula-editor, .formula-execution {
    flex: 1;
    background-color: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.variable-inputs {
    margin: 15px 0;
}

.variable-input {
    margin-bottom: 10px;
}

.variable-input label {
    display: block;
    margin-bottom: 5px;
    font-weight: 600;
    color: #555;
}

.variable-input input {
    width: 100%;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 5px;
}

/* 历史记录样式 */
.history-actions {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.history-container {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

#history-table {
    width: 100%;
    border-collapse: collapse;
}

#history-table th,
#history-table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

#history-table th {
    background-color: #f8f9fa;
    font-weight: 600;
    color: #555;
}

#history-table tr:hover {
    background-color: #f5f7fa;
}

#history-table .action-btn {
    padding: 5px 10px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8rem;
}

#history-table .action-btn:hover {
    background-color: #2980b9;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .wood-container,
    .formula-container {
        flex-direction: column;
    }
    
    .wood-form {
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        height: auto;
        position: static;
    }
    
    .menu-btn {
        justify-content: center;
    }
    
    .main-content {
        padding: 20px;
    }
    
    .buttons {
        gap: 8px;
    }
    
    .btn {
        padding: 12px;
        font-size: 1rem;
    }
}