body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: #f0f2f5;
    color: #333;
    margin: 0;
    padding: 20px;
}

h1 {
    text-align: center;
    color: #1877f2;
}

.container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
}

.card {
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    padding: 20px;
    min-width: 300px;
}

.card h2 {
    margin-top: 0;
    color: #333;
    border-bottom: 1px solid #eee;
    padding-bottom: 10px;
}

#realtime-data p {
    font-size: 1.1em;
    line-height: 1.6;
}

#realtime-data span {
    font-weight: bold;
    color: #1877f2;
}

#history-chart {
    max-width: 100%;
}

/* 开关按钮样式 */
.controls {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}

.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 24px;
    margin-right: 10px;
}

.switch input { 
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .4s;
}

.slider:before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
}

input:checked + .slider {
    background-color: #1877f2;
}

input:checked + .slider:before {
    transform: translateX(26px);
}

.slider.round {
    border-radius: 34px;
}

.slider.round:before {
    border-radius: 50%;
}

.toggle-label {
    cursor: pointer;
}

/* 图表选择器样式 */
.chart-controls {
    margin-bottom: 15px;
}

.chart-controls label {
    margin-right: 10px;
}

.chart-controls select {
    padding: 5px;
    border-radius: 4px;
    border: 1px solid #ddd;
}