:root {
    /* Aero-Dark Palette */
    --bg-app: #030712;
    --bg-sidebar: #020617;
    --bg-card: rgba(15, 23, 42, 0.4);
    --bg-card-hover: rgba(30, 41, 59, 0.6);
    --accent: #38bdf8;
    --accent-glow: rgba(56, 189, 248, 0.3);
    --text-main: #f1f5f9;
    --text-dim: #94a3b8;
    --text-muted: #64748b;
    --success: #10b981;
    --error: #ef4444;
    --border: rgba(255, 255, 255, 0.05);
    
    /* Layout */
    --sidebar-w: 280px;
    --sidebar-collapsed: 80px;
    --header-h: 80px;
    --transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --glass: blur(16px);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-app);
    color: var(--text-main);
    font-family: 'Outfit', sans-serif;
    overflow: hidden;
    height: 100vh;
}

#app {
    display: flex;
    height: 100vh;
}

/* --- SIDEBAR --- */
#sidebar {
    width: var(--sidebar-collapsed);
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    padding: 1.5rem 1rem;
    transition: var(--transition);
    z-index: 100;
}

#sidebar.expanded {
    width: var(--sidebar-w);
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.5rem;
    margin-bottom: 2rem;
}

.logo {
    min-width: 48px;
    height: 48px;
    background: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    padding: 2px;
    box-shadow: 0 0 15px rgba(255,255,255,0.1);
    overflow: hidden;
}

.logo img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.brand-text {
    font-weight: 800;
    letter-spacing: -0.02em;
    font-size: 1.1rem;
    display: none;
}

#sidebar.expanded .brand-text { display: block; }

#sidebar nav {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.nav-btn {
    background: transparent;
    border: none;
    color: var(--text-dim);
    font-size: 1.1rem;
    width: 100%;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 1.25rem;
    padding: 0 1.25rem;
    transition: var(--transition);
    cursor: pointer;
    overflow: hidden;
    white-space: nowrap;
}

.nav-btn .icon {
    min-width: 24px;
    display: flex;
    justify-content: center;
}

.nav-label {
    font-size: 0.85rem;
    font-weight: 600;
    opacity: 1;
    transition: var(--transition);
}

#sidebar:not(.expanded) .nav-label {
    display: none;
}

#sidebar:not(.expanded) .nav-btn {
    padding: 0;
    justify-content: center;
    gap: 0;
}

.nav-btn:hover, .nav-btn.active {
    background: rgba(255, 255, 255, 0.05);
    color: var(--accent);
}

.nav-btn.active {
    box-shadow: 0 0 10px var(--accent-glow);
}

/* --- MAIN CONTENT --- */
main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

#global-header {
    height: var(--header-h);
    padding: 0 2.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border);
    background: rgba(3, 7, 18, 0.6);
    backdrop-filter: var(--glass);
}

#view-title {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.03em;
}

.status-badge {
    font-size: 0.65rem;
    font-weight: 800;
    padding: 2px 8px;
    border-radius: 50px;
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
    letter-spacing: 0.05em;
    margin-top: 4px;
    width: fit-content;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.system-time {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 700;
    color: var(--text-dim);
}

#content-viewport {
    flex: 1;
    overflow-y: auto;
    padding: 2.5rem;
}

.view {
    display: none;
    animation: fadeIn 0.4s ease-out;
}

.view.active { display: block; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- GRID & CARDS --- */
.stats-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

@media (max-width: 1200px) {
    .stats-row { grid-template-columns: repeat(2, 1fr); }
}

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

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 1.5rem;
    backdrop-filter: var(--glass);
}

.stat-card .label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.value-group {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.stat-card .value {
    font-size: 2rem;
    font-weight: 800;
    font-family: 'JetBrains Mono', monospace;
}

.stat-card .unit {
    color: var(--text-muted);
    font-weight: 600;
}

.trend {
    margin-top: 1rem;
    font-size: 0.75rem;
    font-weight: 700;
}

.trend.up { color: var(--success); }
.trend.down { color: var(--error); }
.trend.stable { color: var(--accent); }

/* Node Identity Banner */
.node-identity-banner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(90deg, rgba(56, 189, 248, 0.1), transparent);
    border-left: 4px solid var(--accent);
    padding: 1rem 1.5rem;
    border-radius: 0 16px 16px 0;
    margin-bottom: 2rem;
    animation: slideInRight 0.5s ease-out;
}

.node-info {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.node-icon {
    font-size: 1.5rem;
    filter: drop-shadow(0 0 5px var(--accent-glow));
}

.node-info h3 {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.node-info p {
    font-size: 0.8rem;
    color: var(--text-dim);
    margin-top: 2px;
}

.node-status-chip {
    font-size: 0.65rem;
    font-weight: 800;
    background: var(--accent);
    color: #030712;
    padding: 4px 12px;
    border-radius: 6px;
    letter-spacing: 0.05em;
    box-shadow: 0 4px 10px var(--accent-glow);
}

@keyframes slideInRight {
    from { opacity: 0; transform: translateX(-20px); }
    to { opacity: 1; transform: translateX(0); }
}

/* Analytics Section */
.analytics-row {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1.5rem;
}

.chart-card, .alerts-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 1.5rem;
    backdrop-filter: var(--glass);
    transition: var(--transition);
}

.chart-card.maximized {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 9999;
    border-radius: 0;
    background: var(--bg-app);
    padding: 3rem;
}

.chart-card.maximized .canvas-container {
    height: calc(100% - 100px);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.canvas-container {
    height: 300px;
}

/* --- TABLES --- */
.table-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    overflow: hidden;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th {
    padding: 1rem 1.5rem;
    text-align: left;
    font-size: 0.7rem;
    font-weight: 800;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    background: rgba(255, 255, 255, 0.02);
}

td {
    padding: 1.25rem 1.5rem;
    font-size: 0.9rem;
    border-bottom: 1px solid var(--border);
}

tr:hover td { background: rgba(255, 255, 255, 0.02); }

/* --- COMPONENTS --- */
.primary-btn {
    background: var(--accent);
    color: #000;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    font-weight: 800;
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition);
}

.primary-btn:hover {
    box-shadow: 0 0 20px var(--accent-glow);
    filter: brightness(1.1);
}

.ghost-btn {
    background: transparent;
    color: var(--text-dim);
    border: 1px solid var(--border);
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    cursor: pointer;
}

.minimal-select {
    background: var(--bg-sidebar);
    border: 1px solid var(--border);
    color: var(--text-main);
    padding: 0.4rem 0.8rem;
    border-radius: 8px;
    font-family: inherit;
    font-size: 0.75rem;
}

.icon-btn {
    background: transparent;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
}

/* --- MODALS --- */
#modal-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-card {
    background: var(--bg-sidebar);
    border: 1px solid var(--border);
    border-radius: 24px;
    width: 100%;
    max-width: 500px;
    padding: 2rem;
    box-shadow: 0 20px 40px rgba(0,0,0,0.5);
}

.modal-card header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.input-group { margin-bottom: 1.5rem; }

.input-group label {
    display: block;
    font-size: 0.65rem;
    font-weight: 800;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.input-group input {
    width: 100%;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    color: #fff;
    padding: 0.75rem 1rem;
    border-radius: 12px;
    font-family: inherit;
}

/* Date Picker Icon Visibility */
input[type="date"]::-webkit-calendar-picker-indicator {
    filter: invert(1);
    cursor: pointer;
    opacity: 0.6;
}

input[type="date"]::-webkit-calendar-picker-indicator:hover {
    opacity: 1;
}

.modal-card footer {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    margin-top: 1rem;
}

.hidden { display: none !important; }

/* --- MAP --- */
.map-container {
    height: 600px;
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid var(--border);
}

#leaflet-map { width: 100%; height: 100%; }

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 2rem;
}

.pagination-btn {
    background: var(--bg-sidebar);
    border: 1px solid var(--border);
    color: var(--text-dim);
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-weight: 700;
    transition: var(--transition);
}

.pagination-btn:hover, .pagination-btn.active {
    background: var(--accent);
    color: #000;
    border-color: var(--accent);
    box-shadow: 0 0 15px var(--accent-glow);
}

/* Custom Map Marker Glow */
.pin-marker {
    display: flex;
    align-items: center;
    justify-content: center;
    filter: drop-shadow(0 0 8px var(--accent-glow));
    animation: marker-pulse 2s infinite;
}

.pin-shape {
    width: 32px;
    height: 32px;
    background: var(--accent);
    border-radius: 50% 50% 50% 0;
    transform: rotate(-45deg);
    border: 2px solid #fff;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.pin-shape::after {
    content: '';
    width: 10px;
    height: 10px;
    background: #fff;
    border-radius: 50%;
    transform: rotate(45deg);
}

.pin-marker.error .pin-shape {
    background: var(--error);
}

@keyframes marker-pulse {
    0% { filter: drop-shadow(0 0 2px var(--accent-glow)); transform: scale(1); }
    50% { filter: drop-shadow(0 0 12px var(--accent-glow)); transform: scale(1.1); }
    100% { filter: drop-shadow(0 0 2px var(--accent-glow)); transform: scale(1); }
}

.leaflet-div-icon {
    background: var(--accent);
    border: 2px solid #fff;
    border-radius: 50%;
    box-shadow: 0 0 10px var(--accent-glow);
}