:root {
            /* --primary: #2563eb; */
            --primary: #007bff;
            --primary-dark: #1643bf;
            --secondary: #10b981;
            --danger: #ef4444;
            --warning: #f59e0b;
            --bg: #f8fafc;
            --card: #ffffff;
            --text: #1e293b;
            --text-light: #64748b;
            --border: #e2e8f0;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
            --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
        }

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

        body {
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
        }

        /* Header */
        header {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: white;
            padding: 3rem 1rem;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        header::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: rgba(255,255,255,0.05);
            border-radius: 50%;
        }

        header h1 {
            font-size: 2.5rem;
            margin-bottom: 0.5rem;
            position: relative;
            z-index: 1;
        }

        header p {
            font-size: 1.2rem;
            opacity: 0.9;
            max-width: 600px;
            margin: 0 auto;
            position: relative;
            z-index: 1;
        }

        /* Navigation */
        nav {
            background: var(--card);
            padding: 1rem;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 100;
        }

        nav ul {
            list-style: none;
            display: flex;
            justify-content: center;
            gap: 2rem;
            flex-wrap: wrap;
            max-width: 1200px;
            margin: 0 auto;
        }

        nav a {
            text-decoration: none;
            color: var(--text);
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 8px;
            transition: all 0.3s;
        }

        nav a:hover {
            background: var(--primary);
            color: white;
        }

        /* Container */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 2rem 1rem;
        }

        /* Cards */
        .card {
            background: var(--card);
            border-radius: 16px;
            padding: 2rem;
            box-shadow: var(--shadow);
            margin-bottom: 2rem;
            border: 1px solid var(--border);
        }

        .card h2 {
            color: var(--primary);
            margin-bottom: 1rem;
            font-size: 1.5rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        /* Calculator Section */
        .calculator-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
            margin-bottom: 2rem;
        }

        @media (max-width: 768px) {
            .calculator-grid {
                grid-template-columns: 1fr;
            }
            header h1 {
                font-size: 1.8rem;
            }
        }

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

        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: var(--text);
        }

        input[type="number"], input[type="text"], select {
            width: 100%;
            padding: 0.875rem;
            border: 2px solid var(--border);
            border-radius: 10px;
            font-size: 1rem;
            transition: border-color 0.3s;
            font-family: inherit;
        }

        input[type="number"]:focus, input[type="text"]:focus, select:focus {
            outline: none;
            border-color: var(--primary);
        }

        .input-hint {
            font-size: 0.85rem;
            color: var(--text-light);
            margin-top: 0.25rem;
        }

        .btn {
            background: var(--primary);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 10px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
            width: 100%;
            font-family: inherit;
        }

        .btn:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-lg);
        }

        .btn-secondary {
            background: var(--secondary);
        }

        .btn-secondary:hover {
            background: #059669;
        }

        /* Results */
        .results-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
            margin-top: 2rem;
        }

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

        .result-card {
            padding: 1.5rem;
            border-radius: 12px;
            text-align: center;
            color: white;
            position: relative;
            overflow: hidden;
        }

        .result-card::before {
            content: '';
            position: absolute;
            top: -20px;
            right: -20px;
            width: 80px;
            height: 80px;
            background: rgba(255,255,255,0.1);
            border-radius: 50%;
        }

        .result-card.needs {
            background: linear-gradient(135deg, #3b82f6, #2563eb);
        }

        .result-card.wants {
            background: linear-gradient(135deg, #f59e0b, #d97706);
        }

        .result-card.savings {
            background: linear-gradient(135deg, #10b981, #059669);
        }

        .result-card h3 {
            font-size: 0.9rem;
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 0.5rem;
            opacity: 0.9;
        }

        .result-card .amount {
            font-size: 2rem;
            font-weight: 700;
        }

        .result-card .percentage {
            font-size: 1rem;
            opacity: 0.8;
            margin-top: 0.25rem;
        }

        /* Chart Container */
        .chart-container {
            position: relative;
            height: 300px;
            margin: 2rem 0;
        }

        /* Advice Section */
        .advice-list {
            list-style: none;
        }

        .advice-list li {
            padding: 1rem;
            margin-bottom: 0.75rem;
            background: #f1f5f9;
            border-radius: 10px;
            border-left: 4px solid var(--primary);
            display: flex;
            align-items: flex-start;
            gap: 0.75rem;
        }

        .advice-list li::before {
            content: '💡';
            font-size: 1.2rem;
            flex-shrink: 0;
        }

        /* Savings Goals */
        .goal-item {
            display: flex;
            align-items: center;
            gap: 1rem;
            padding: 1rem;
            background: #f8fafc;
            border-radius: 10px;
            margin-bottom: 0.75rem;
            border: 1px solid var(--border);
        }

        .goal-progress {
            flex: 1;
            height: 12px;
            background: var(--border);
            border-radius: 6px;
            overflow: hidden;
        }

        .goal-progress-bar {
            height: 100%;
            background: linear-gradient(90deg, var(--secondary), #34d399);
            border-radius: 6px;
            transition: width 0.5s ease;
        }

        /* Expense Categories */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
        }

        .category-card {
            background: #f8fafc;
            border-radius: 12px;
            padding: 1.5rem;
            border: 2px solid var(--border);
            transition: all 0.3s;
        }

        .category-card:hover {
            border-color: var(--primary);
            transform: translateY(-3px);
            box-shadow: var(--shadow);
        }

        .category-card h4 {
            color: var(--primary);
            margin-bottom: 0.75rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .category-card ul {
            list-style: none;
            padding: 0;
        }

        .category-card li {
            padding: 0.4rem 0;
            color: var(--text-light);
            font-size: 0.95rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .category-card li::before {
            content: '✓';
            color: var(--secondary);
            font-weight: bold;
        }

        /* Tips Section */
        .tip-card {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 2rem;
            border-radius: 16px;
            margin-bottom: 1.5rem;
        }

        .tip-card h3 {
            margin-bottom: 1rem;
            font-size: 1.3rem;
        }

        .tip-card p {
            opacity: 0.95;
            line-height: 1.7;
        }

        /* Footer */
        footer {
            background: #f1f1f1;
            color: black;
            padding: 3rem 1rem;
            text-align: center;
            margin-top: 4rem;
        }

        footer p {
            opacity: 0.8;
            margin-bottom: 0.5rem;
        }

        /* Animations */
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .animate-in {
            animation: fadeIn 0.6s ease forwards;
        }

        /* Utility */
        .text-center {
            text-align: center;
        }

        .mb-2 {
            margin-bottom: 2rem;
        }

        .highlight {
            background: linear-gradient(120deg, #fef3c7 0%, #fef3c7 100%);
            padding: 0.2rem 0.4rem;
            border-radius: 4px;
            font-weight: 600;
        }

        /* Print styles */
        @media print {
            nav, .btn, footer {
                display: none;
            }
            .card {
                break-inside: avoid;
                box-shadow: none;
                border: 1px solid #ccc;
            }
        }