:root {
            --primary-color: #0e3a36;
            --secondary-color: #c61515;
            --text-color: #eee4e4;
            --light-color: #0f655e;
            --shadow: 0 4px 6px rgba(37, 31, 31, 0.1);
        }
        
        body {
            font-family: 'Segoe UI', Tahoma, Verdana, sans-serif;
            margin: 0;
            padding: 0;
            background-color: var(--light-color);
            color: var(--text-color);
            
        }
        
        .container {
            max-width: 800px;
            margin: 0 auto;
            padding: 30px;
        }
        
        header {
            text-align: center;
            margin-bottom: 30px;
            position: relative;
        }
        
        
        .tagline {
            font-size: 1.4rem;
            color: rgb(186, 223, 206);
            margin-top: 5px;
            font-style:italic;
        }
        
        .calculator {
            background-color: rgb(180, 223, 207);
            border-radius: 17px;
            padding: 30px;
            margin-bottom: 20px;
        }
        
        h2 {
            color: var(--primary-color);
            margin-top: 0;
            border-bottom: 2px solid var(--primary-color);
            padding-bottom: 5px;
            display: inline-block;
        }
        
        .subjects-container {
            margin-bottom: 30px;
        }
        
        .subject-row {
            display: flex;
            gap: 15px;
            margin-bottom: 15px;
            align-items: center;
        }
        
        .subject-row input, .subject-row select {
            padding: 10px 15px;
            border: 1px solid #045847;
            border-radius: 5px;
            font-size: 16px;
            flex: 1;
        }
        
        .remove-btn {
            background-color: #bd4545;
            color: rgb(241, 240, 240);
            border: none;
            border-radius: 5px;
            padding: 10px 15px;
            cursor: pointer;
            font-weight: bold;
            transition: all 0.3s;
        }
        
        .remove-btn:hover {
            background-color: #ad1818;
            transform: scale(1.05);
        }
        
        .action-buttons {
            display: flex;
            justify-content: space-between;
            margin-top: 20px;
        }
        
        .add-btn, .calculate-btn {
            padding: 10px 20px;
            border: none;
            border-radius: 50px;
            font-size: 16px;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s;
            box-shadow: var(--shadow);
        }
        
        .add-btn {
            background-color: var(--primary-color);
            color: rgb(241, 236, 236);
        }
        
        .add-btn:hover {
            background-color: #1c5b55;
            transform: translateY(-2px);
        }
        
        .calculate-btn {
            background-color: var(--primary-color);
            color: rgb(241, 236, 236);
           
        }
        
        
        .calculate-btn:hover {
            background-color: #1c5b55;
            transform: translateY(-2px);
        }
    
        
        
        .result {
            text-align: center;
            margin-top: 30px;
            padding: 20px;
            border-radius: 10px;
            background-color: rgb(52, 138, 123);
            display: none;
        }
        
        .sgpa-value {
            font-size: 3rem;
            font-weight: bold;
            color: var(--primary-color);
            margin: 10px 0;
        }
        
        .congrats {
            font-size: 1.5rem;
            color: #b4dcd6;
            margin-top: 20px;
            padding: 15px;
            border-radius: 5px;
            background-color: rgba(154, 197, 194, 0.1);
            display: none;
            animation: pulse 2s infinite;
        }
        
        .good-job {
            font-size: 1.5rem;
            color: #b4dcd6;
            margin-top: 20px;
            padding: 15px;
            border-radius: 5px;
            background-color: rgba(154, 197, 194, 0.1);
            display: none;
            animation: pulse 2s infinite;
        }
        
        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.05); }
            100% { transform: scale(1); }
        }
        
        footer {
            text-align: center;
            margin-top: 50px;
            padding: 20px;
            color: var(--text-color);
            font-size: 0.9rem;
        }
        
        @media (max-width: 768px) {
            .subject-row {
                flex-direction: column;
                gap: 10px;
            }
        
            
            .action-buttons {
                flex-direction: column;
                gap: 15px;
            }
            
            .add-btn, .calculate-btn {
                width: 100%;
            }
        }