:root {
    --primary-color: #007bff;
    --success-color: #28a745;
    --temp-color: rgb(255, 99, 132);
    --hum-color: rgb(54, 162, 235);
    --eth-color: rgb(75, 192, 192);
    --co2-color: rgb(153, 102, 255);
    --bg-color: #f8f9fa;
    --card-bg-color: #ffffff;
    --text-color: #212529;
    --border-color: #dee2e6;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --border-radius: 12px;
    --alert-color: #dc3545;
}

body {
    font-family: 'Noto Sans KR', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    max-width: 1200px;
    margin: auto;
    padding: 20px;
}

h1,
h2,
h3 {
    text-align: center;
}

.controls {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    margin: 20px 0;
}

.controls input[type="date"],
.controls button {
    font-size: 1em;
    padding: 10px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    font-family: 'Noto Sans KR', sans-serif;
}

.controls button {
    cursor: pointer;
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transition: background-color 0.2s;
}

.controls button:hover {
    opacity: 0.9;
}

.device-selector {
    text-align: center;
}

.device-selector button {
    font-size: 1em;
    font-weight: 500;
    padding: 10px 20px;
    margin: 5px;
    cursor: pointer;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    background-color: var(--card-bg-color);
    transition: all 0.2s ease-in-out;
}

.device-selector button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.device-selector button.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.dashboard {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
    margin-top: 20px;
}

.chart-container {
    background-color: var(--card-bg-color);
    border: 1px solid var(--border-color);
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
    transition: all 0.2s ease-in-out;
}

.latest-value {
    font-size: 2.2em;
    font-weight: 700;
    margin-top: 15px;
}

.latest-value .unit {
    font-size: 0.5em;
    font-weight: 400;
    margin-left: 8px;
    color: #6c757d;
}

.chart-container.alert {
    border: 2px solid var(--alert-color);
    animation: pulse-red 1.5s infinite;
}

@keyframes pulse-red {
    0% {
        box-shadow: 0 0 0 0 rgba(220, 53, 69, 0.7);
    }

    70% {
        box-shadow: 0 0 0 10px rgba(220, 53, 69, 0);
    }

    100% {
        box-shadow: 0 0 0 0 rgba(220, 53, 69, 0);
    }
}

@media (max-width: 768px) {
    .dashboard {
        grid-template-columns: 1fr;
    }

    .controls {
        flex-direction: column;
    }
}