/* =========================================
   1. CORE VARIABLES & THEME SETUP
   ========================================= */
:root {
    /* --- DEFAULT (DARK MODE) --- */
    --bg-dark: #020617;
    --bg-card: #0f172a;
    --bg-card-hover: #1e293b;

    --primary: #14b8a6;
    --primary-gradient: linear-gradient(135deg, #2dd4bf 0%, #0ea5e9 100%);

    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border: rgba(255, 255, 255, 0.08);
    
    --navbar-bg: rgba(2, 6, 23, 0.85);
    --input-bg: #020617;
    --card-shadow: none; /* No shadow needed in dark mode */

    --nav-height: 80px;

    /* 🆕 GRID COLOR (Dark Mode) - Very subtle */
    --grid-color: rgba(255, 255, 255, 0.03); 
}

/* --- LIGHT MODE OVERRIDES --- */
body.light-mode {
    /* 1. Background is Off-White, Cards are Pure White */
    --bg-dark: #f1f5f9;       /* Slate-100 */
    --bg-card: #ffffff;       /* White */
    --bg-card-hover: #f8fafc; /* Slate-50 */

    /* 2. High Contrast Text */
    --text-main: #0f172a;     /* Slate-900 */
    --text-muted: #64748b;    /* Slate-500 */
    
    /* 3. Stronger Borders & Inputs */
    --border: rgba(148, 163, 184, 0.4); 
    --navbar-bg: rgba(255, 255, 255, 0.90);
    --input-bg: #ffffff;
    
    /* 4. Essential Shadow for Light Mode Depth */
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);

    /* 🆕 GRID COLOR (Light Mode) - Subtle slate */
    --grid-color: rgba(0, 0, 0, 0.04);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

/* --- LEAFLET MAP FIXES --- */
.leaflet-tile-pane img,
.leaflet-shadow-pane img,
.leaflet-image-layer,
.leaflet-tile {
    box-sizing: content-box !important;
    max-width: none !important;
    border: none !important;
    padding: 0 !important;
}

/* Light Mode Map Popup Fix */
body.light-mode .dark-popup .leaflet-popup-content-wrapper,
body.light-mode .dark-popup .leaflet-popup-tip {
    background: #ffffff;
    color: #0f172a;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    border: 1px solid #cbd5e1;
}

/* =========================================
   2. GENERAL LAYOUT & BACKGROUND GRID
   ========================================= */
body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    position: relative;
    transition: background-color 0.3s ease, color 0.3s ease;

    /* 🆕 THE GRID PATTERN */
    /* Creates a 50px x 50px grid using linear gradients */
    background-image: 
        linear-gradient(to right, var(--grid-color) 1px, transparent 1px),
        linear-gradient(to bottom, var(--grid-color) 1px, transparent 1px);
    background-size: 50px 50px;
}

/* 🆕 THE FADE VIGNETTE */
/* Fades the grid out at the edges for a professional look */
body::before {
    content: '';
    position: fixed; /* Fixed ensures it stays put when scrolling */
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;

    /* The "Spotlight" Mask: Shows grid in center, fades to solid bg at edges */
    background: radial-gradient(circle at 50% 0%, transparent 10%, var(--bg-dark) 90%);
    
    /* Optional: Subtle blue accent glow at the very top */
    box-shadow: inset 0 0 100px rgba(14, 165, 233, 0.05);
}

a {
    text-decoration: none;
    color: inherit;
    transition: 0.2s;
}

/* --- NAVBAR --- */
.navbar {
    height: var(--nav-height);
    border-bottom: 1px solid var(--border);
    background: var(--navbar-bg);
    backdrop-filter: blur(12px);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: background 0.3s ease;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
    height: 100%;
}

.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.brand-group {
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand-logo {
    width: 40px;
    height: 40px;
    background: rgba(45, 212, 191, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    color: #2dd4bf;
}

.brand-text .main-title {
    font-weight: 700;
    font-size: 1rem;
    line-height: 1.2;
    letter-spacing: -0.01em;
}

.brand-text .sub-title {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    align-items: center;
}

.nav-link {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link:hover {
    color: var(--text-main);
}

.btn-ghost {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1.2rem;
    padding: 8px;
    border-radius: 50%;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}
.btn-ghost:hover {
    background: rgba(255,255,255,0.1);
    color: var(--primary);
}
/* Fix Ghost Button Hover in Light Mode */
body.light-mode .btn-ghost:hover {
    background: rgba(0,0,0,0.05); 
    color: var(--primary);
}

/* =========================================
   3. HERO SECTION
   ========================================= */
.hero {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 4rem 1rem;
}

.badge-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: rgba(14, 165, 233, 0.1);
    border: 1px solid rgba(14, 165, 233, 0.2);
    border-radius: 99px;
    color: #38bdf8;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 2rem;
}

.hero h1 {
    font-size: 4.5rem;
    margin-bottom: 0.2rem;
    line-height: 1.1;
    font-weight: 800;
    letter-spacing: -0.03em;
}

.hero h2 {
    font-size: 2.5rem;
    line-height: 1.2;
    margin-bottom: 1rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.text-gradient {
    background: linear-gradient(to right, #2dd4bf, #0ea5e9);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
/* Darker Gradient for Light Mode readability */
body.light-mode .text-gradient {
    background: linear-gradient(to right, #0d9488, #0284c7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 700px;
    margin-bottom: 3rem;
}

.btn-group {
    display: flex;
    gap: 1.5rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 1rem;
}

.btn-primary {
    background: var(--primary-gradient);
    color: #020617;
    box-shadow: 0 0 20px rgba(45, 212, 191, 0.3);
    border: none;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(45, 212, 191, 0.5);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-main);
}

.btn-outline:hover {
    border-color: var(--text-muted);
    background: rgba(255, 255, 255, 0.03);
}
/* Fix Outline Button in Light Mode */
body.light-mode .btn-outline {
    border-color: #cbd5e1;
    color: #0f172a;
}
body.light-mode .btn-outline:hover {
    background: #f1f5f9;
    border-color: #94a3b8;
}

/* =========================================
   4. FEATURES
   ========================================= */
.features-section {
    padding: 2rem 0 6rem;
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    padding: 0 2rem;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 2.5rem;
    transition: 0.3s;
    position: relative;
    overflow: hidden;
    /* Apply shadow variable (visible in light mode only) */
    box-shadow: var(--card-shadow); 
}

.feature-card:hover {
    border-color: rgba(45, 212, 191, 0.3);
    transform: translateY(-5px);
}

.icon-box {
    width: 50px;
    height: 50px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.icon-cyan { background: rgba(34, 211, 238, 0.1); color: #22d3ee; }
.icon-red { background: rgba(248, 113, 113, 0.1); color: #f87171; }
.icon-green { background: rgba(74, 222, 128, 0.1); color: #4ade80; }

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

.feature-card p {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* =========================================
   5. STATS BAR
   ========================================= */
.stats-bar {
    background: var(--bg-dark);
    border-top: 1px solid var(--border);
    padding: 4rem 2rem;
    width: 100%;
}

/* Force Light Mode Stats Bar to White */
body.light-mode .stats-bar {
    background: #ffffff;
    border-top: 1px solid #e2e8f0;
}

.stats-grid {
    max-width: 1000px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    text-align: center;
    gap: 2rem;
}

.stat-item h3 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}

/* FIX: Override inline style="color: #fff" in Light Mode */
body.light-mode .stats-bar h3[style*="color: #fff"] {
    color: #0f172a !important;
}

.stat-label {
    color: var(--text-muted);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* =========================================
   6. FOOTER
   ========================================= */
.main-footer {
    border-top: 1px solid var(--border);
    padding: 2rem;
    text-align: center;
    color: #64748b;
    font-size: 0.85rem;
    background: var(--bg-dark);
}

/* =========================================
   7. MAP & DASHBOARD COMPONENTS
   ========================================= */
.ward-hotspot {
    transition: all 0.2s ease;
    cursor: pointer;
}

.ward-hotspot:hover {
    filter: brightness(1.2);
}

.ward-hotspot-high { filter: drop-shadow(0 0 8px rgba(239, 68, 68, 0.6)); }
.ward-hotspot-medium { filter: drop-shadow(0 0 6px rgba(234, 179, 8, 0.5)); }
.ward-hotspot-low { filter: drop-shadow(0 0 4px rgba(34, 197, 94, 0.4)); }

.ward-hotspot-pulse {
    animation: pulse-ring 2s ease-out infinite;
    transform-origin: center;
}

@keyframes pulse-ring {
    0% { opacity: 0.4; transform: scale(1); }
    50% { opacity: 0.1; }
    100% { opacity: 0; transform: scale(1.5); }
}

.dark-popup .leaflet-popup-content-wrapper {
    background: var(--bg-card);
    color: var(--text-main);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    border-radius: 8px;
    border: 1px solid var(--border);
}

.dark-popup .leaflet-popup-tip {
    background: var(--bg-card);
}

/* Card & Container Fixes for Dashboard/Admin */
.card, .map-container {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: var(--card-shadow); /* Applies depth in Light Mode */
}

/* Inputs in Light Mode */
body.light-mode input, 
body.light-mode select {
    background: #f8fafc;
    border: 1px solid #cbd5e1;
    color: #0f172a;
}

/* =========================================
   8. MOBILE OPTIMIZATION
   ========================================= */
@media (max-width: 768px) {
    .container { padding: 0 1rem; }
    
    .navbar-compact .container { padding: 0 1rem; }
    .brand-text { display: none; }
    @media (min-width: 400px) { .brand-text { display: block; } }

    .main-grid { grid-template-columns: 1fr !important; gap: 1.5rem; }
    .kpi-grid { grid-template-columns: repeat(2, 1fr) !important; gap: 0.75rem; }
    .map-container { height: 300px; }
    .table-wrapper { overflow-x: auto; -webkit-overflow-scrolling: touch; }
    .priority-item { padding: 0.75rem; }

    .dashboard-container { grid-template-columns: 1fr !important; height: auto !important; padding: 1rem !important; }
    .map-wrapper { height: 45vh !important; min-height: 300px; }
    .sidebar { width: 100%; padding-right: 0; overflow-y: visible; }

    input, select, button, .btn, .btn-hero { min-height: 48px; font-size: 16px; }
    input[type=range]::-webkit-slider-thumb { height: 24px; width: 24px; }

    h1 { font-size: 1.5rem !important; }
    h2 { font-size: 1.25rem !important; }
    h3 { font-size: 1.1rem !important; }
    p, span, div { font-size: 0.95rem; }
}