:root {
    --primary-color: #3498db;
    --secondary-color: #2ecc71;
    --accent-color: #e74c3c;
    --light-color: #ecf0f1;
    --dark-color: #2c3e50;
    --border-color: #bdc3c7;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --hover-color: #f5f5f5;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: #f9f9f9;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px 0;
    border-bottom: 2px solid var(--primary-color);
}

header h1 {
    color: var(--primary-color);
    font-size: 2.5rem;
    font-weight: 600;
}

.settings-panel {
    background-color: white;
    border-radius: 10px;
    padding: 25px;
    margin-bottom: 30px;
    box-shadow: 0 5px 15px var(--shadow-color);
}

.setting-group {
    margin-bottom: 20px;
}

.setting-group h3 {
    margin-bottom: 15px;
    color: var(--dark-color);
    font-size: 1.2rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 8px;
}

.water-content-settings, .density-settings {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 15px;
}

.input-group {
    margin-bottom: 15px;
}

.input-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: var(--dark-color);
}

.input-group input {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
}

/* 添加自动计算输入框的提示文字样式 */
.auto-calc-input::placeholder {
    color: #ff3333;
    font-weight: 500;
    opacity: 0.8;
}

.auto-calc-input:focus::placeholder {
    opacity: 1;
}

.button-group {
    display: flex;
    gap: 15px;
    margin-top: 25px;
}

.button-group {
    display: flex;
    gap: 15px;
    margin-top: 25px;
}

.btn {
    padding: 12px 20px;
    border: none;
    border-radius: 5px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn i {
    font-size: 1.1rem;
}

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

.btn.secondary {
    background-color: var(--secondary-color);
    color: white;
}

.btn.info {
    background-color: #17a2b8;
    color: white;
}

.btn.info:hover {
    background-color: #138496;
}

.btn.success {
    background-color: #9b59b6;
    color: white;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 10px var(--shadow-color);
}

.btn:active {
    transform: translateY(0);
}

.warning-panel {
    background-color: #fff3cd;
    border: 1px solid #ffeeba;
    color: #856404;
    padding: 15px;
    border-radius: 5px;
    margin-bottom: 30px;
    display: none;
}

.warning-panel i {
    margin-right: 10px;
    color: #f39c12;
}

.results-panel {
    background-color: white;
    border-radius: 10px;
    padding: 25px;
    box-shadow: 0 5px 15px var(--shadow-color);
}

.results-panel h2 {
    margin-bottom: 20px;
    color: var(--dark-color);
    font-size: 1.5rem;
    text-align: center;
}

.table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
    font-size: 0.95rem;
}

th, td {
    padding: 10px 8px;
    text-align: center;
    border: 1px solid var(--border-color);
    min-width: 80px;
}

th {
    background-color: var(--primary-color);
    color: white;
    font-weight: 500;
}

/* 双列数据的样式 */
td[colspan="2"] {
    background-color: #f8f9fa;
}

/* 第一列（标题列）的样式 */
td:first-child {
    font-weight: 500;
    background-color: #f2f2f2;
    min-width: 120px;
    text-align: left;
    padding-left: 15px;
}

/* 相邻的双列数据单元格样式 */
tr td:nth-child(odd):not(:first-child) {
    border-right: 1px dashed var(--border-color);
}

tr td:nth-child(even) {
    border-left: none;
}

/* 模态框样式 */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.4);
}

.modal-content {
    background-color: #fefefe;
    margin: 5% auto;
    padding: 20px;
    border: 1px solid #888;
    width: 80%;
    max-width: 800px;
    max-height: 90vh;
    overflow-y: auto;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.close:hover,
.close:focus {
    color: black;
    text-decoration: none;
}

.chart-container {
    width: 100%;
    height: 500px;
    margin: 20px 0;
    border: 1px solid #ddd;
    background-color: #f9f9f9;
}

.results-info {
    margin-top: 20px;
    text-align: center;
}

.result-item {
    font-size: 16px;
    margin: 10px 0;
    font-weight: bold;
}

.result-display {
    margin-top: 20px;
}

.result-display table {
    width: 100%;
    border-collapse: collapse;
    margin: 0 auto;
}

.result-display td {
    padding: 8px;
    border: 1px solid #ddd;
    text-align: center;
}

/* 响应式调整 */
@media (max-width: 992px) {
    .table-container {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    table {
        font-size: 0.9rem;
    }
    
    th, td {
        padding: 8px 6px;
        min-width: 70px;
    }
}

@media (max-width: 768px) {
    .water-content-settings, .density-settings {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .button-group {
        flex-direction: column;
    }
}

@media (max-width: 576px) {
    .water-content-settings, .density-settings {
        grid-template-columns: 1fr;
    }
    
    th, td {
        padding: 8px 10px;
        font-size: 0.9rem;
    }
}