body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f7f6;
    color: #333;
}

header {
    background-color: #4CAF50;
    color: white;
    padding: 20px;
    text-align: center;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1 );
}

header p {
    font-size: 0.9em;
    margin-top: 5px;
}

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

.data-section {
    background-color: white;
    padding: 20px;
    margin-bottom: 30px;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.card {
    background-color: #e8f5e9;
    padding: 15px;
    border-radius: 6px;
    text-align: center;
    border-left: 5px solid #4CAF50;
}

.card h3 {
    margin-top: 0;
    font-size: 1em;
    color: #388E3C;
}

.value {
    font-size: 2.5em;
    font-weight: bold;
    color: #1B5E20;
    margin: 5px 0;
}

.unit {
    font-size: 0.8em;
    color: #666;
}

.soil-card {
    border-left-color: #795548;
    background-color: #efebe9;
}

#history-chart {
    height: 400px;
}

footer {
    text-align: center;
    padding: 10px;
    color: #999;
    font-size: 0.8em;
}