:root {
            --primary-color: #0f172a;
            /* Deep Slate */
            --accent-color: #10b981;
            /* Emerald Green for money */
            --bg-light: #f8fafc;
            --border-color: #e2e8f0;
        }

        body {
            font-family: 'Inter', sans-serif;
            background-color: var(--bg-light);
        }

        .salary-section {
            padding: 60px 0;
        }

        /* Main Card Container */
        .calculator-card {
            background: #fff;
            border-radius: 20px;
            box-shadow: 0 10px 40px -10px rgba(0, 0, 0, 0.1);
            overflow: hidden;
            border: 1px solid rgba(0, 0, 0, 0.05);
        }

        /* Left Side - Inputs */
        .input-panel {
            padding: 40px;
        }

        .panel-title {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 25px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .form-label {
            font-size: 0.85rem;
            font-weight: 600;
            color: #64748b;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 8px;
        }

        .input-group-text {
            background: #f1f5f9;
            border: 1px solid var(--border-color);
            color: #64748b;
            font-weight: 600;
        }

        .form-control {
            border: 1px solid var(--border-color);
            padding: 12px;
            font-size: 1rem;
            font-weight: 500;
            color: var(--primary-color);
        }

        .form-control:focus {
            border-color: var(--accent-color);
            box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
        }

        /* Buttons */
        .btn-toggle {
            font-size: 0.9rem;
            font-weight: 600;
            padding: 8px 16px;
            border-radius: 8px;
            border: 1px dashed #cbd5e1;
            color: #475569;
            width: 100%;
            text-align: left;
            background: transparent;
            transition: all 0.3s;
        }

        .btn-toggle:hover {
            background: #f8fafc;
            border-color: var(--accent-color);
            color: var(--accent-color);
        }

        .btn-toggle.active {
            background: #ecfdf5;
            border-color: var(--accent-color);
            color: var(--accent-color);
            border-style: solid;
        }

        /* Right Side - Results */
        .result-panel {
            background: var(--primary-color);
            padding: 40px;
            color: white;
            height: 100%;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .result-header {
            text-align: center;
            margin-bottom: 30px;
        }

        .net-salary-box {
            background: rgba(255, 255, 255, 0.1);
            border-radius: 16px;
            padding: 25px;
            text-align: center;
            margin-bottom: 30px;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .net-label {
            font-size: 0.9rem;
            color: #94a3b8;
            margin-bottom: 5px;
        }

        .net-amount {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--accent-color);
            line-height: 1.2;
        }

        .breakdown-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .breakdown-item {
            display: flex;
            justify-content: space-between;
            padding: 12px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.95rem;
        }

        .breakdown-item:last-child {
            border-bottom: none;
        }

        .breakdown-label {
            color: #cbd5e1;
        }

        .breakdown-value {
            font-weight: 600;
            color: white;
        }

        .badge-year {
            background: rgba(255, 255, 255, 0.2);
            padding: 4px 8px;
            border-radius: 4px;
            font-size: 0.7rem;
            margin-left: 5px;
        }

        /* Animations */
        .fade-in {
            animation: fadeIn 0.4s ease-in-out;
        }

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

            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @media (max-width: 768px) {
            .result-panel {
                border-radius: 0 0 20px 20px;
                padding: 30px 20px;
            }

            .input-panel {
                padding: 30px 20px;
            }
        }