:root {
    --primary-color: #2196F3;
    --secondary-color: #FF5722;
    --background-color: #f5f5f5;
    --card-background: #ffffff;
    --text-color: #333333;
    --border-color: #e0e0e0;
    --success-color: #4CAF50;
    --warning-color: #FF9800;
    --error-color: #f44336;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

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

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--border-color);
}

h1 {
    font-size: 2rem;
    color: var(--primary-color);
}

.device-selector {
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 15px;
    background-color: var(--card-background);
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.device-selector label {
    font-weight: 600;
}

.device-selector select {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--card-background);
    font-size: 1rem;
    cursor: pointer;
    min-width: 200px;
}

.device-selector select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.connection-status {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background-color: var(--card-background);
    border-radius: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--warning-color);
}

.status-dot.connected {
    background-color: var(--success-color);
}

.status-dot.disconnected {
    background-color: var(--error-color);
}

.current-values {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.value-card {
    background-color: var(--card-background);
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    text-align: center;
    transition: transform 0.2s;
}

.value-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.15);
}

.value-card h2 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: #666;
}

.value-card .value {
    font-size: 2.5rem;
    font-weight: bold;
    margin: 10px 0;
}

.temperature .value {
    color: var(--secondary-color);
}

.humidity .value {
    color: var(--primary-color);
}

#humidityCard {
    display: block; /* デフォルトで表示 */
}

.stats {
    display: flex;
    justify-content: space-around;
    margin-top: 15px;
    font-size: 0.9rem;
    color: #666;
}

.period-selector {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 30px;
}

.period-btn {
    padding: 10px 20px;
    border: none;
    background-color: var(--card-background);
    color: var(--text-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

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

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

.chart-container {
    background-color: var(--card-background);
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    margin-bottom: 30px;
    height: 400px;
}

#sensorChart {
    max-height: 100%;
}

.info-panel {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    background-color: var(--card-background);
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    font-size: 0.9rem;
    color: #666;
}

@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    header {
        flex-direction: column;
        gap: 15px;
    }
    
    h1 {
        font-size: 1.5rem;
    }
    
    .period-selector {
        flex-wrap: wrap;
    }
    
    .period-btn {
        flex: 1;
        min-width: 80px;
    }
    
    .info-panel {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
}