:root {
            --bg-body: #f3f6fc;
            --bg-card: #ffffff;
            --text-main: #111827;
            --text-muted: #6b7280;
            --border-light: #e5e7eb;
            
            --primary: #4F46E5; /* Indigo */
            --secondary: #0ea5e9; /* Light Blue */
            --success: #10b981; /* Emerald */
            --danger: #ef4444; /* Red */
            --warning: #f59e0b; /* Amber */
            
            --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
            
            --font-main: 'Outfit', sans-serif;
            --font-secondary: 'Inter', sans-serif;
            --border-radius: 24px;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: var(--font-main);
        }

        body {
            background-color: var(--bg-body);
            color: var(--text-main);
            line-height: 1.5;
            -webkit-font-smoothing: antialiased;
        }

        /* Top Navigation */
        .navbar {
            background: linear-gradient(135deg, var(--primary), #868CFF);
            padding: 1.2rem 2.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            position: sticky;
            top: 0;
            z-index: 50;
            box-shadow: var(--shadow-md);
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-size: 1.5rem;
            font-weight: 700;
            color: #ffffff;
            letter-spacing: 0.5px;
        }

        .brand i {
            color: var(--warning);
            font-size: 1.8rem;
        }

        .nav-controls {
            display: flex;
            gap: 1rem;
            background: rgba(255, 255, 255, 0.1);
            padding: 0.5rem;
            border-radius: 15px;
            backdrop-filter: blur(10px);
        }

        .tab-btn {
            background: transparent;
            border: none;
            padding: 0.6rem 1.2rem;
            border-radius: 10px;
            font-weight: 600;
            color: rgba(255, 255, 255, 0.7);
            cursor: pointer;
            transition: all 0.3s;
        }

        .tab-btn:hover {
            color: #ffffff;
            background-color: rgba(255, 255, 255, 0.15);
        }

        .tab-btn.active {
            color: var(--primary);
            background-color: #ffffff;
            box-shadow: var(--shadow-sm);
        }

        /* Layout */
        .container {
            max-width: 1400px;
            margin: 2rem auto;
            padding: 0 2rem;
            animation: fadeIn 0.5s ease-out;
        }

        .page-header {
            margin-bottom: 2rem;
        }

        .page-title {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--text-main);
            letter-spacing: -0.5px;
        }

        .dashboard-grid {
            display: grid;
            grid-template-columns: repeat(12, 1fr);
            gap: 1.5rem;
        }

        /* Card Styles */
        .card {
            background: var(--bg-card);
            border-radius: var(--border-radius);
            padding: 1.8rem;
            box-shadow: var(--shadow-md);
            transition: transform 0.3s;
            position: relative;
            overflow: hidden;
        }
        
        .card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-lg);
        }

        .card-title {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-muted);
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        /* Values */
        .value-large {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--text-main);
        }
        
        .value-subtitle {
            font-size: 0.85rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* Specific Cards */
        .progress-card {
            grid-column: span 12;
            background: #ffffff;
        }

        .progress-header {
            display: flex;
            justify-content: space-between;
            align-items: flex-end;
            margin-bottom: 1rem;
        }

        .progress-track {
            width: 100%;
            height: 18px;
            background-color: #f1f5f9;
            border-radius: 9999px;
            overflow: hidden;
            box-shadow: inset 0 2px 4px rgba(0,0,0,0.05);
        }

        .progress-fill {
            height: 100%;
            background: linear-gradient(90deg, var(--secondary), var(--primary));
            border-radius: 9999px;
            width: 0%;
            transition: width 1s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* KPI Row */
        .kpi-row {
            grid-column: span 12;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 1.5rem;
        }

        .kpi-card {
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            border-left: 5px solid transparent;
        }
        
        .kpi-paddy { border-color: var(--success); }
        .kpi-bg { border-color: var(--primary); }
        .kpi-free { border-color: var(--danger); }

        .icon-box {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
        }
        
        /* Math Box */
        .math-box {
            background: var(--bg-body);
            border-radius: 12px;
            padding: 1rem;
            margin-top: 1rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .math-item { text-align: center; }
        .math-item span { font-size: 1.2rem; font-weight: 700; display: block; }
        .math-item small { font-size: 0.75rem; color: var(--text-muted); font-weight: 600; text-transform: uppercase;}
        .math-op { font-size: 1.5rem; font-weight: 700; color: var(--primary); }

        /* Sections Grid */
        .section-panel {
            grid-column: span 6;
            display: flex;
            flex-direction: column;
        }

        /* Bags Grid */
        .bags-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1rem;
            margin-top: 1rem;
        }

        .bag-box {
            background-color: var(--bg-body);
            border: 1px solid var(--border-light);
            border-radius: 12px;
            padding: 1rem;
            text-align: center;
        }

        .bag-box i { font-size: 1.5rem; color: var(--text-muted); margin-bottom: 0.5rem; }
        .bag-val { font-size: 1.5rem; font-weight: 700; color: var(--text-main); }
        .bag-label { font-size: 0.75rem; font-weight: 600; color: var(--text-muted); text-transform: uppercase; }


        /* Alerts List */
        .alert-list {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            margin-top: 1rem;
        }

        .alert-item {
            display: flex;
            align-items: center;
            gap: 1rem;
            padding: 1.2rem;
            background-color: var(--bg-body);
            border-radius: 15px;
            border-left: 4px solid var(--warning);
        }

        .alert-item.safe { border-left-color: var(--success); }

        /* Letter Generator */
        .letter-generator {
            display: none; /* hidden on combined */
            background: linear-gradient(145deg, #ffffff, #f8faff);
            border: 1px solid #e2e8f0;
        }

        .generator-controls {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1rem;
            margin-bottom: 1.5rem;
        }

        .input-group label {
            display: block;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 0.5rem;
        }

        .input-group select, .input-group input[type="file"] {
            width: 100%;
            padding: 0.8rem;
            border-radius: 10px;
            border: 1px solid var(--border-light);
            outline: none;
            background: #ffffff;
            font-family: var(--font-main);
        }
        
        .input-group textarea {
            width: 100%;
            padding: 1rem;
            border-radius: 10px;
            border: 1px solid var(--border-light);
            outline: none;
            height: 180px;
            resize: vertical;
            font-family: var(--font-main);
        }

        .btn {
            background: var(--primary);
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 10px;
            font-weight: 600;
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            transition: all 0.2s;
        }

        .btn:hover { background: #3311cc; transform: translateY(-2px); }

        /* Hidden Letter Preview Canvas */
        #letterPreview {
            width: 800px;
            height: 1131px; /* A4 Ratio */
            background-color: white;
            position: absolute;
            top: -9999px;
            left: -9999px;
            padding: 300px 80px 100px 80px; /* Leave space for Letterhead header */
            box-sizing: border-box;
            background-size: 100% 100%;
            background-repeat: no-repeat;
        }
        
        .letter-content-render {
            font-family: 'Times New Roman', Times, serif;
            font-size: 16px;
            line-height: 1.6;
            color: #000;
            white-space: pre-wrap;
        }

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

        @media (max-width: 1024px) {
            .section-panel { grid-column: span 12; }
            .kpi-row { grid-template-columns: repeat(2, 1fr); }
            .generator-controls { grid-template-columns: 1fr; }
        }


        /* Responsive Overrides for Mobile */
        @media (max-width: 768px) {
            .navbar { flex-direction: column; gap: 1rem; padding: 1rem; }
            .nav-controls { width: 100%; display: flex; flex-wrap: wrap; gap: 0.5rem; justify-content: center; }
            .tab-btn { flex: 1 1 auto; text-align: center; font-size: 0.85rem; padding: 0.5rem; }
            .math-box { flex-direction: column; gap: 1rem; text-align: center; }
            .math-box .op { margin: 0 auto; transform: rotate(90deg); }
            .kpi-row { grid-template-columns: 1fr; }
            .bags-grid { grid-template-columns: 1fr; }
            
            /* Responsive Utilities */
            .flex-resp { flex-direction: column !important; align-items: flex-start !important; gap: 0.8rem !important; }
            .flex-resp-center { flex-direction: column !important; align-items: center !important; gap: 0.8rem !important; text-align: center; }
            .flex-resp-end { align-items: flex-start !important; }
            .value-large { justify-content: flex-start !important; font-size: 1.2rem !important; flex-wrap: wrap; }
            
            /* Typography Scale */
            .page-title { font-size: 1.5rem !important; }
            .card-title { font-size: 1rem !important; }
            
            /* Overflows for Tables */
            .table-responsive { overflow-x: auto; -webkit-overflow-scrolling: touch; width: 100%; display: block; border-radius: 8px; }
            .table-responsive table { min-width: 600px; }
            
            /* Progress section fixes */
            .progress-header { flex-direction: column; gap: 1rem; align-items: flex-start; }
            .progress-header > div { width: 100%; text-align: left !important; }
            .progress-header .value-large { justify-content: flex-start !important; }
        }
        
        @media (max-width: 480px) {
            .nav-controls button { font-size: 0.75rem; padding: 0.5rem; }
            .value-large span { font-size: 1rem !important; }
        }
        @keyframes pulseSupport {
            0% { box-shadow: 0 0 0 0 rgba(67, 24, 255, 0.4); }
            70% { box-shadow: 0 0 0 15px rgba(67, 24, 255, 0); }
            100% { box-shadow: 0 0 0 0 rgba(67, 24, 255, 0); }
        }
        @keyframes popInSupport {
            0% { opacity: 0; transform: scale(0.9); }
            100% { opacity: 1; transform: scale(1); }
        }

        /* Dark Mode */
        body.dark-mode {
            --bg-body: #0f172a;
            --bg-card: #1e293b;
            --text-main: #f8fafc;
            --text-muted: #94a3b8;
            --border-light: #334155;
        }
        
        body.dark-mode .card, body.dark-mode .math-box, body.dark-mode .bag-box, body.dark-mode .alert-item {
            border: 1px solid var(--border-light);
            background-color: var(--bg-card);
        }
        
        body.dark-mode .navbar {
            background: linear-gradient(135deg, #1e293b, #0f172a);
        }
        
        /* Skeleton Loaders */
        .skeleton {
            background: #e2e8f0;
            background: linear-gradient(110deg, #ececec 8%, #f5f5f5 18%, #ececec 33%);
            border-radius: 5px;
            background-size: 200% 100%;
            animation: 1.5s shine linear infinite;
            color: transparent !important;
        }
        body.dark-mode .skeleton {
            background: linear-gradient(110deg, #334155 8%, #475569 18%, #334155 33%);
            background-size: 200% 100%;
        }
        @keyframes shine {
            to { background-position-x: -200%; }
        }
        
        .full-brand-name {
            display: none;
        }
        @media (min-width: 768px) {
            .full-brand-name {
                display: inline;
            }
        }
/* Login Screen Styles */
.login-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: var(--bg-body);
    padding: 2rem;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
}
.login-card {
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 400px;
    border: 1px solid var(--border-light);
}
.login-input {
    width: 100%;
    padding: 1rem;
    margin-bottom: 1rem;
    border: 1px solid var(--border-light);
    border-radius: 10px;
    font-size: 1rem;
    background: var(--bg-body);
    color: var(--text-main);
}
.login-btn {
    width: 100%;
    padding: 1rem;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s;
}
.login-btn:hover {
    background: var(--primary-hover);
}
.hidden { display: none !important; }

/* Splash Screen */
#splashScreen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: var(--bg-body);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease-out;
}
.splash-logo {
    height: 120px;
    object-fit: contain;
    margin-bottom: 20px;
    filter: drop-shadow(0 10px 20px rgba(0,0,0,0.1));
    border-radius: 10px;
    background: white;
    padding: 10px;
    animation: pulse 2s infinite ease-in-out;
}
.splash-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-main);
    letter-spacing: 1px;
}
.splash-sub {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 5px;
    letter-spacing: 2px;
    text-transform: uppercase;
}
@keyframes pulse {
    0% { transform: scale(0.95); opacity: 0.8; }
    50% { transform: scale(1.05); opacity: 1; }
    100% { transform: scale(0.95); opacity: 0.8; }
}