:root {
    --bg-main: #fcfcfc;
    --text-dark: #222;
    --text-light: #fff;
    --header-bg: #4a5c76;
    --border-color: #ddd;

    /* Layer Colors */
    --layer-trust: #e6f7ff;
    --layer-onto: #fff5cc;
    --layer-rdf: #ffe6e6;
    --layer-xml: #e6ffe6;
    --layer-uri: #f2e6ff;
    --layer-inst: #f0f0f0;

    /* Hover and Active states */
    --highlight: rgba(0, 102, 204, 0.1);
    --active-border: #0066cc;
}

body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-dark);
}

header {
    background-color: var(--header-bg);
    color: var(--text-light);
    padding: 20px;
    text-align: center;
}

header h1 {
    margin: 0 0 10px 0;
    font-size: 24px;
}

header p {
    margin: 0;
    font-size: 14px;
    opacity: 0.8;
}

.layout {
    display: flex;
    max-width: 1200px;
    margin: 20px auto;
    padding: 0 20px;
    gap: 20px;
}

/* Sidebar Styling */
.sidebar {
    width: 250px;
    background: #fff;
    border-right: 1px solid var(--border-color);
    padding-right: 20px;
}

.sidebar h3 {
    font-size: 14px;
    color: #666;
    text-transform: uppercase;
    margin-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 5px;
}

.sidebar ul {
    list-style: none;
    padding: 0;
    margin: 0 0 30px 0;
}

.sidebar li {
    padding: 8px 12px;
    margin-bottom: 5px;
    cursor: pointer;
    border-radius: 4px;
    font-size: 14px;
    transition: background 0.2s;
}

.sidebar li:hover {
    background: #f5f5f5;
}

.sidebar li.active {
    background: var(--highlight);
    border-left: 3px solid var(--active-border);
    font-weight: bold;
}

/* Main Grid Styling */
.atlas-container {
    flex-grow: 1;
    overflow-x: auto;
}

.atlas-grid {
    display: grid;
    grid-template-columns: 120px repeat(6, 1fr);
    gap: 1px;
    background-color: var(--border-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.header-cell {
    background-color: var(--header-bg);
    color: white;
    padding: 10px;
    text-align: center;
    font-weight: bold;
    font-size: 12px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.header-cell.corner {
    background-color: #3a4c66;
}

.row-header {
    background-color: #e0e0e0;
    color: #333;
    text-align: right;
    padding-right: 15px;
}

.row-header .tbl-layer {
    font-weight: normal;
    font-size: 10px;
    color: #666;
    margin-top: 4px;
}

.holon-cell {
    padding: 15px 10px;
    text-align: center;
    cursor: pointer;
    transition: transform 0.1s, box-shadow 0.1s;
    position: relative;
    background-color: white;
}

.holon-cell::before {
    content: attr(data-cell);
    position: absolute;
    top: 4px;
    right: 6px;
    font-size: 9px;
    color: #aaa;
    font-family: monospace;
}

.holon-cell .title {
    font-size: 12px;
    font-weight: bold;
    margin-bottom: 4px;
}

.holon-cell .subtext {
    font-size: 10px;
    color: #555;
    font-style: italic;
}

.holon-cell:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    z-index: 10;
}

/* Layer Background Colors */
.holon-cell.layer-trust { background-color: var(--layer-trust); }
.holon-cell.layer-onto { background-color: var(--layer-onto); }
.holon-cell.layer-rdf { background-color: var(--layer-rdf); }
.holon-cell.layer-xml { background-color: var(--layer-xml); }
.holon-cell.layer-uri { background-color: var(--layer-uri); }
.holon-cell.layer-inst { background-color: var(--layer-inst); }

/* Faded state for filtering */
.holon-cell.faded, .header-cell.faded {
    opacity: 0.3;
    pointer-events: none;
    background-color: #fafafa !important;
}

/* Modal Styling */
.modal {
    display: none;
    position: fixed;
    z-index: 100;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    backdrop-filter: blur(3px);
}

.modal-content {
    background-color: #fff;
    margin: 5% auto;
    padding: 30px;
    border-radius: 8px;
    width: 80%;
    max-width: 700px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    position: relative;
    animation: zoomIn 0.3s ease-out;
}

@keyframes zoomIn {
    from { transform: scale(0.9); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.close-btn {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    line-height: 1;
}

.close-btn:hover {
    color: #000;
}

.modal-header {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 15px;
    margin-bottom: 20px;
}

.modal-header h2 {
    margin: 0 0 10px 0;
    color: var(--header-bg);
}

.modal-tags .tag {
    display: inline-block;
    padding: 4px 8px;
    background: #e0e0e0;
    border-radius: 4px;
    font-size: 12px;
    margin-right: 8px;
    font-weight: bold;
}

.mock-data-viz {
    background: #2d2d2d;
    padding: 15px;
    border-radius: 6px;
    margin-top: 20px;
}

.mock-code {
    font-family: monospace;
    color: #00ff00;
    margin: 0;
    font-size: 13px;
    white-space: pre-wrap;
}
/* Styling for implemented LEGO coordinates */
.holon-cell.implemented {
    border: 3px solid #10b981 !important; /* Emerald green border */
    box-shadow: inset 0 0 10px rgba(16, 185, 129, 0.2);
    position: relative;
}

.holon-cell.implemented::after {
    content: "✓";
    position: absolute;
    bottom: 2px;
    right: 5px;
    font-size: 11px;
    color: #10b981;
    font-weight: bold;
}

/* Styling for implemented infrastructure/network coordinates */
.holon-cell.implemented-infra {
    border: 3px solid #6366f1 !important; /* Indigo border */
    box-shadow: inset 0 0 10px rgba(99, 102, 241, 0.2);
    position: relative;
}

.holon-cell.implemented-infra::after {
    content: "✓";
    position: absolute;
    bottom: 2px;
    right: 5px;
    font-size: 11px;
    color: #6366f1;
    font-weight: bold;
}

footer {
    text-align: center;
    padding: 20px;
    margin-top: 40px;
    border-top: 1px solid var(--border-color);
    font-size: 11px;
    color: #666;
    background-color: #fafafa;
    line-height: 1.5;
}