body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    display: flex;
    flex-direction: column; /* Changed to column for header + grid */
    align-items: center;
    min-height: 100vh; /* Use min-height to allow content to push body height */
    margin: 0;
    background-color: #f4f7f6;
    color: #333;
    padding: 20px; /* Add some padding */
    box-sizing: border-box; /* Include padding in element's total width and height */
}

.header-container {
    text-align: center;
    padding: 20px;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    margin-bottom: 20px;
    width: 90%; /* Adjust width */
    max-width: 800px; /* Max width for header */
}

h1 {
    color: #0b2d48;
    margin-bottom: 10px;
}

p {
    font-size: 1rem;
    color: #555;
    margin: 5px 0;
}

code {
    background-color: #e8e8e8;
    padding: 3px 8px;
    border-radius: 4px;
    font-family: "Courier New", Courier, monospace;
    font-size: 0.9rem;
}

#node-grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); /* Responsive grid */
    gap: 15px; /* Space between grid items */
    width: 90%; /* Adjust width */
    max-width: 1200px; /* Max width for grid */
    padding: 20px;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.loading-message {
    grid-column: 1 / -1; /* Span across all columns */
    text-align: center;
    font-style: italic;
    color: #888;
}

.node-cell {
    border: 1px solid #ddd;
    border-radius: 6px;
    padding: 15px;
    text-align: center;
    font-size: 0.9rem;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    transition: background-color 0.3s ease, border-color 0.3s ease, transform 0.1s ease;
    cursor: pointer;
    position: relative; /* For tooltip positioning */
    overflow: hidden; /* Hide overflow for truncated UUID */
}

.node-cell:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.node-uuid {
    font-weight: bold;
    margin-bottom: 5px;
    color: #333;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis; /* Truncate long UUIDs */
}

.node-status-text {
    font-size: 0.8rem;
    color: #666;
}

/* Health Status Colors */
.node-healthy {
    background-color: #e6ffe6; /* Light green */
    border-color: #4CAF50; /* Green */
}

.node-warning {
    background-color: #fffacd; /* Light yellow */
    border-color: #FFC107; /* Orange */
}

.node-critical {
    background-color: #ffe6e6; /* Light red */
    border-color: #F44336; /* Red */
}

.node-unknown {
    background-color: #f0f0f0; /* Light gray */
    border-color: #9E9E9E; /* Gray */
}

/* Tooltip styles */
.node-tooltip {
    visibility: hidden;
    opacity: 0;
    width: 200px;
    background-color: #333;
    color: #fff;
    text-align: left;
    border-radius: 6px;
    padding: 10px;
    position: absolute;
    z-index: 1;
    bottom: 100%; /* Position above the node cell */
    left: 50%;
    margin-left: -100px; /* Center the tooltip */
    transition: opacity 0.3s;
    font-size: 0.8rem;
    white-space: normal; /* Allow text to wrap */
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.node-tooltip::after {
    content: " ";
    position: absolute;
    top: 100%; /* At the bottom of the tooltip */
    left: 50%;
    margin-left: -5px;
    border-width: 5px;
    border-style: solid;
    border-color: #333 transparent transparent transparent;
}

.node-cell:hover .node-tooltip {
    visibility: visible;
    opacity: 1;
}

.node-tooltip p {
    margin: 2px 0;
    color: #eee;
}