:root {
            --primary-color: #00c853;
            --primary-hover: #009624;
            --secondary-color: #1e1e1e;
            --text-color: #333;
            --bg-color: #f5f5f5;
            --card-bg: #ffffff;
            --chart-grid: rgba(0, 0, 0, 0.1);
            --input-border: #ddd;
            --error-color: #f44336;
        }

        [data-theme="dark"] {
            --primary-color: #00e676;
            --primary-hover: #00c853;
            --secondary-color: #121212;
            --text-color: #e0e0e0;
            --bg-color: #1e1e1e;
            --card-bg: #2d2d2d;
            --chart-grid: rgba(255, 255, 255, 0.1);
            --input-border: #555;
        }

        body {
            font-family: 'Montserrat', sans-serif;
            background-color: var(--bg-color);
            color: var(--text-color);
            transition: all 0.3s ease;
            margin: 0;
            padding: 0;
            line-height: 1.6;
        }

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

        header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 2rem;
        }

        h1 {
            color: var(--primary-color);
            font-weight: 700;
            margin: 0;
        }

        h2 {
            margin-top: 0;
            color: var(--primary-color);
        }



        .card {
            background-color: var(--card-bg);
            border-radius: 12px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
            padding: 2rem;
            margin-bottom: 2rem;
            transition: all 0.3s ease;
        }

        .form-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1.5rem;
        }

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

        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 500;
        }

        .input-wrapper {
            position: relative;
        }

        .input-wrapper:before {
            content: attr(data-prefix);
            position: absolute;
            left: 0.75rem;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-color);
            opacity: 0.7;
        }

        .input-wrapper.prefix input {
            padding-left: 2.5rem;
        }

        .input-wrapper.suffix input {
            padding-right: 2.5rem;
        }

        .input-wrapper:after {
            content: attr(data-suffix);
            position: absolute;
            right: 0.75rem;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-color);
            opacity: 0.7;
        }

        input {
            width: 100%;
            padding: 0.75rem;
            border: 1px solid var(--input-border);
            border-radius: 8px;
            font-size: 1rem;
            background-color: var(--card-bg);
            color: var(--text-color);
            transition: border-color 0.3s;
            box-sizing: border-box;
        }

        input:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 2px rgba(0, 200, 83, 0.2);
        }

        .error-message {
            color: var(--error-color);
            font-size: 0.85rem;
            margin-top: 0.5rem;
            display: none;
        }

        .input-error input {
            border-color: var(--error-color);
        }

        .input-error .error-message {
            display: block;
        }

        .action-buttons {
            display: flex;
            gap: 1rem;
            margin-top: 1rem;
        }

        button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0.75rem 1.5rem;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 500;
            cursor: pointer;
            transition: background-color 0.3s, transform 0.1s;
            flex: 1;
        }

        button:hover {
            background-color: var(--primary-hover);
        }

        button:active {
            transform: scale(0.98);
        }

        button:focus {
            outline: 2px solid var(--primary-color);
            outline-offset: 2px;
        }

        button.secondary {
            background-color: transparent;
            border: 1px solid var(--primary-color);
            color: var(--primary-color);
        }

        button.secondary:hover {
            background-color: rgba(0, 200, 83, 0.1);
        }

        .results {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 1.5rem;
            margin-top: 2rem;
        }

        .result-card {
            background-color: var(--primary-color);
            color: white;
            padding: 1.5rem;
            border-radius: 8px;
            text-align: center;
            transition: transform 0.3s;
        }

        .result-card:hover {
            transform: translateY(-5px);
        }

        .result-card h3 {
            margin-top: 0;
            font-weight: 500;
        }

        .result-value {
            font-size: 1.8rem;
            font-weight: 700;
            margin: 0.5rem 0;
        }

        .chart-container {
            height: 400px;
            margin-top: 2rem;
            position: relative;
            margin-bottom: 6rem;
        }

        .tooltip {
            position: relative;
            display: inline-block;
            margin-left: 0.5rem;
            cursor: help;
        }

        .tooltip .tooltip-icon {
            width: 16px;
            height: 16px;
            background-color: var(--text-color);
            color: var(--card-bg);
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            font-weight: bold;
        }

        .tooltip .tooltip-text {
            visibility: hidden;
            width: 200px;
            background-color: var(--secondary-color);
            color: white;
            text-align: center;
            border-radius: 6px;
            padding: 0.75rem;
            position: absolute;
            z-index: 1;
            bottom: 125%;
            left: 50%;
            transform: translateX(-50%);
            opacity: 0;
            transition: opacity 0.3s;
            font-size: 0.85rem;
            box-shadow: 0 2px 10px rgba(0,0,0,0.2);
        }

        .tooltip:hover .tooltip-text {
            visibility: visible;
            opacity: 1;
        }

        .summary-box {
            background-color: rgba(0, 200, 83, 0.1);
            border-left: 4px solid var(--primary-color);
            padding: 1rem 1.5rem;
            border-radius: 4px;
        }

        .summary-box h3 {
            margin-top: 0;
            color: var(--primary-color);
        }

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

        .summary-list li {
            display: flex;
            justify-content: space-between;
            padding: 0.5rem 0;
            border-bottom: 1px solid rgba(0, 0, 0, 0.1);
        }

        .summary-list li:last-child {
            border-bottom: none;
        }

        .results {
            justify-items: center;
        }
        .result-card {
            width: 100%;
            max-width: 280px;
        }

        @media (min-width: 1024px) {
            .results {
              grid-template-columns: repeat(3, 1fr);
            }
            
          }

        @media (max-width: 768px) {
            .container {
                padding: 1rem;
            }
            
            .card {
                padding: 1.5rem;
            }
            
            .results {
                grid-template-columns: 1fr;
            }
            
            .result-value {
                font-size: 1.5rem;
            }
            
            .action-buttons {
                flex-direction: column;
            }
            
            .chart-container {
                height: 300px;
                margin-bottom: -12rem;
            }
        }

        .fade-in {
            animation: fadeIn 0.5s ease-in;
        }

        .loading {
            display: flex;
            justify-content: center;
            align-items: center;
            height: 300px;
        }

        .spinner {
            width: 40px;
            height: 40px;
            border: 4px solid rgba(0, 200, 83, 0.1);
            border-radius: 50%;
            border-top-color: var(--primary-color);
            animation: spin 1s linear infinite;
        }

        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }