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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

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

header {
    background-color: #2c3e50;
    color: white;
    padding: 20px;
    border-radius: 5px;
    margin-bottom: 20px;
    text-align: center;
}

h1, h2 {
    margin-bottom: 15px;
}

.control-panel, .records-list {
    background-color: white;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}

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

label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

input, select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
}

.btn {
    display: inline-block;
    padding: 10px 15px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s;
}

.btn-primary {
    background-color: #3498db;
    color: white;
}

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

.btn-secondary {
    background-color: #95a5a6;
    color: white;
}

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

.btn-danger {
    background-color: #e74c3c;
    color: white;
}

.btn-danger:hover {
    background-color: #c0392b;
}

.btn-success {
    background-color: #2ecc71;
    color: white;
}

.btn-success:hover {
    background-color: #27ae60;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

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

th {
    background-color: #f2f2f2;
    font-weight: bold;
}

tr:hover {
    background-color: #f5f5f5;
}

.loading {
    text-align: center;
    padding: 20px;
    font-style: italic;
    color: #666;
}

/* 在现有样式文件末尾添加以下样式 */

.connection-status {
    margin-top: 10px;
    padding: 5px 10px;
    border-radius: 4px;
    font-size: 14px;
    background-color: #f8f9fa;
    display: inline-block;
}

.connection-status.connected {
    background-color: #d4edda;
    color: #155724;
}

.connection-status.error {
    background-color: #f8d7da;
    color: #721c24;
}

/* 增强错误消息显示 */
.error {
    color: #e74c3c;
    padding: 15px;
    background-color: #fadbd8;
    border-radius: 4px;
    margin: 15px 0;
    display: none;
    border-left: 5px solid #e74c3c;
}

footer {
    text-align: center;
    padding: 20px;
    color: #7f8c8d;
}

/* 模态框样式 */
.modal {
    display: none;
    position: fixed;
    z-index: 1;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.4);
}

.modal-content {
    background-color: #fefefe;
    margin: 10% auto;
    padding: 20px;
    border: 1px solid #888;
    width: 80%;
    max-width: 600px;
    border-radius: 5px;
}

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

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

.action-buttons {
    display: flex;
    gap: 5px;
}

.action-buttons button {
    padding: 5px 10px;
    font-size: 14px;
}

@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    th, td {
        padding: 8px;
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .action-buttons button {
        margin-bottom: 5px;
    }
}