body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f0f2f5;
    color: #333;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    background-color: #007bff;
    color: white;
    padding: 15px 20px;
    text-align: center;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

h1 {
    margin: 0;
    font-size: 1.8em;
}

.sensor-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
    padding: 15px;
    flex-grow: 1;
    justify-content: center;
    align-content: start;
}

.sensor-card {
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    padding: 15px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    text-align: left;
    min-height: 120px;
}

.sensor-card.full-width {
    grid-column: 1 / -1; /* Spans full width */
}

.sensor-card h3 {
    margin-top: 0;
    color: #007bff;
    font-size: 1.1em;
    border-bottom: 1px solid #eee;
    padding-bottom: 8px;
    margin-bottom: 8px;
}

.sensor-card pre {
    margin: 0;
    font-size: 0.85em;
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, Courier, monospace;
    white-space: pre-wrap; /* Allows text to wrap */
    word-wrap: break-word; /* Breaks long words */
    color: #555;
    flex-grow: 1;
    overflow: auto; /* In case content is too long */
}

.sensor-card .error {
    color: #dc3545;
    font-weight: bold;
}

.sensor-card .loading {
    color: #6c757d;
}

footer {
    background-color: #343a40;
    color: white;
    text-align: center;
    padding: 10px 20px;
    margin-top: auto;
    font-size: 0.9em;
}

/* Responsive adjustments for smaller screens */
@media (max-width: 600px) {
    .sensor-grid {
        grid-template-columns: 1fr; /* Stack cards vertically on very small screens */
    }
    .sensor-card.full-width {
        grid-column: auto;
    }
}