:root {
    /* Color Palette - Power BI / Microsoft Native Theme */
    --bg-base: #F3F2F1; /* Standard Microsoft Light Gray */
    --bg-surface: #FFFFFF; /* High contrast White */
    --bg-panel: #FAF9F8; 
    
    --primary-ms: #0078D4; /* Azure/Windows Blue */
    --primary-pbi: #F2C811; /* Power BI Yellow */
    --accent-teal: #008272; /* Excel Green */
    --accent-purple: #8661C5; /* Teams Purple */
    
    --text-main: #323130; /* Near black */
    --text-muted: #605E5C; /* Medium gray */
    
    --success: #107C10; /* MS Success */
    --danger: #D83B01; /* MS Error */
    --warning: #F59E0B; /* Standard Warning */
    
    --border-light: #EDEBE9; /* Soft border */
    --border-highlight: #C8C6C4;
    
    --shadow-base: 0 1.6px 3.6px 0 rgba(0,0,0,0.132), 0 0.3px 0.9px 0 rgba(0,0,0,0.108);
    --shadow-accent: 0 4px 8px rgba(0,0,0,0.1);

    --font-heading: 'Segoe UI', "Inter", sans-serif;
    --font-body: 'Segoe UI', "Inter", sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scrollbar-width: thin;
    scrollbar-color: var(--border-highlight) var(--bg-base);
}

body {
    background-color: var(--bg-base);
    color: var(--text-main);
    font-family: var(--font-body);
    font-size: 14px;
    line-height: 1.5;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* Microsoft Fluent Design Panels */
.glass-panel {
    background: var(--bg-surface);
    border: 1px solid var(--border-light);
    border-radius: 4px; /* Native squareness */
    box-shadow: var(--shadow-base);
    transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.glass-panel:hover {
    box-shadow: var(--shadow-accent);
}

/* Base Buttons */
.btn {
    font-family: var(--font-body);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    border-radius: 2px; /* Square edges */
    border: none;
    padding: 6px 16px;
    font-size: 13px;
}

.primary-btn {
    background: var(--primary-ms);
    color: #fff;
    box-shadow: 0 2px 4px rgba(0, 120, 212, 0.2);
}
.primary-btn:hover {
    background: #005A9E;
    box-shadow: 0 4px 8px rgba(0, 120, 212, 0.3);
}

.toggle-btn {
    background: var(--bg-surface);
    border: 1px solid #8A8886;
    color: var(--text-main);
    padding: 4px 12px;
}
.toggle-btn:hover {
    background: var(--bg-panel);
}
.toggle-btn.active {
    background: var(--primary-ms);
    border-color: var(--primary-ms);
    color: #fff;
}

.mt-4 { margin-top: 1rem; }
.mb-4 { margin-bottom: 2rem; }
.mt-auto { margin-top: auto; }

/* Layout */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar Navigation */
.sidebar {
    width: 260px;
    padding: 1.5rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    position: sticky;
    top: 0;
    height: 100vh;
    background: var(--bg-surface); 
    border-right: 1px solid var(--border-light);
    border-radius: 0; 
    box-shadow: none;
    z-index: 10;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding-bottom: 0.5rem;
    padding-left: 0.5rem;
}

.brand h2 {
    font-weight: 600;
    font-size: 1.4rem;
    color: var(--text-main);
}

.brand-subtitle {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    font-weight: 600;
    margin-top: -1rem;
    padding-left: 0.5rem;
}

.nav-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.nav-links li a {
    text-decoration: none;
    color: var(--text-main);
    font-weight: 400;
    display: flex;
    align-items: center;
    gap: 0.85rem;
    padding: 10px 14px;
    border-radius: 4px;
    font-size: 14px;
    transition: background 0.15s ease;
}

.nav-links li a i {
    width: 20px;
    font-size: 16px;
    color: var(--text-muted);
    text-align: center;
}

.nav-links li a:hover {
    background: var(--bg-base);
}

.nav-links li.active a {
    background: var(--bg-panel);
    font-weight: 600;
    position: relative;
}

.nav-links li.active a::before {
    content: '';
    position: absolute;
    left: 4px;
    top: 8px;
    bottom: 8px;
    width: 3px;
    border-radius: 2px;
    background: var(--primary-ms);
}

.nav-links li.active a i {
    color: var(--primary-ms);
}

/* Main Content Area */
.content {
    flex: 1;
    padding: 1.5rem 2rem;
    max-width: 1500px;
}

.topbar {
    margin-bottom: 1.5rem;
    display: flex;
    flex-direction: column;
}

.topbar h1 {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 0px;
}

.topbar .subtitle {
    color: var(--text-muted);
    font-weight: 400;
    font-size: 13px;
}

/* Live Tracker Header */
.live-tracker {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem 1.5rem;
    border-left: 4px solid var(--primary-pbi);
    margin-bottom: 1.5rem;
}

.live-header {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.2rem;
}

.live-dot {
    width: 6px; height: 6px;
    border-radius: 50%;
    background-color: var(--primary-pbi);
    animation: blink 2s infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

.live-counter {
    font-size: 2.2rem;
    font-weight: 400;
    color: var(--text-main);
    line-height: 1;
}

.live-counter .unit {
    font-size: 14px;
    color: var(--text-muted);
}

.live-sub {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 0.2rem;
}

/* KPI Dashboard Grid */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.2rem;
    margin-bottom: 1.5rem;
}

.kpi-card {
    padding: 1.2rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.kpi-accent {
    border-top: 3px solid var(--primary-ms);
}

.kpi-title {
    color: var(--text-muted);
    font-size: 12px;
    font-weight: 400;
}

.kpi-value {
    font-size: 1.8rem;
    font-weight: 400;
    color: var(--text-main);
    margin: 4px 0;
}

.kpi-trend {
    font-size: 12px;
    font-weight: 600;
}

.kpi-trend.good { color: var(--success); }
.kpi-trend.bad { color: var(--danger); }

/* Charts Area Wrapper */
.charts-wrapper {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.2rem;
}

.info-badge {
    background: transparent;
    color: var(--text-muted);
    font-size: 12px;
}

.span-full {
    grid-column: 1 / -1;
}

.chart-card {
    padding: 1.2rem;
    display: flex;
    flex-direction: column;
}

.card-header {
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border-light);
    padding-bottom: 8px;
}

.card-header h3 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 2px;
    color: var(--text-main);
}

.card-desc {
    color: var(--text-muted);
    font-size: 12px;
}

#energy-matrix-header h3 {
    color: var(--primary-pbi);
}

.scenario-toggles {
    display: flex;
    gap: 4px;
}

.chart-container {
    position: relative;
    height: 320px;
    width: 100%;
}

/* Overriding Leaflet to Light Theme */
.leaflet-container {
    background: #EAEAEA !important;
    font-family: var(--font-body) !important;
}
.leaflet-popup-content-wrapper, .leaflet-popup-tip {
    background: var(--bg-surface) !important;
    color: var(--text-main) !important;
    border: 1px solid var(--border-light);
    border-radius: 2px;
}

/* Tabbed Areas */
.tab-content {
    display: none;
    animation: fadeIn 0.4s ease forwards;
}

.tab-content.active {
    display: block;
}

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

/* Responsive */
@media (max-width: 1024px) {
    .charts-wrapper { grid-template-columns: 1fr; }
    .kpi-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .app-container { flex-direction: column; }
    .sidebar { width: 100%; height: auto; position: relative; gap: 0.5rem; padding: 1rem; border-right: none; border-bottom: 1px solid var(--border-light); }
    .nav-links { flex-direction: row; flex-wrap: wrap; }
    .kpi-grid { grid-template-columns: 1fr; }
    .content { padding: 1rem; }
}