:root {
            --primary-color: #4361ee;
            --primary-light: #4895ef;
            --secondary-color: #3f37c9;
            --accent-color: #4cc9f0;
            --light-color: #f8f9fa;
            --dark-color: #212529;
            --darker-color: #1a1e23;
            --success-color: #4caf50;
            --warning-color: #ff9800;
            --danger-color: #f44336;
            --border-radius: 12px;
            --box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
            --glass-effect: rgba(255, 255, 255, 0.05);
            --glass-border: rgba(255, 255, 255, 0.1);
        }

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

        body {
            font-family: 'Poppins', sans-serif;
            background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 20px;
            color: var(--light-color);
            line-height: 1.6;
        }

        .container {
            background: rgba(26, 30, 35, 0.8);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            width: 100%;
            max-width: 600px;
            padding: 30px;
            transition: var(--transition);
            border: 1px solid var(--glass-border);
            animation: fadeInUp 0.6s ease-out;
        }

        h1 {
            text-align: center;
            margin-bottom: 30px;
            color: var(--accent-color);
            font-weight: 600;
            font-size: 2.2rem;
            background: linear-gradient(to right, #4cc9f0, #4361ee);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            position: relative;
            padding-bottom: 10px;
        }

        h1::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 3px;
            background: linear-gradient(to right, #4cc9f0, #4361ee);
            border-radius: 3px;
        }

        #cgpa-form {
            display: flex;
            flex-direction: column;
            gap: 25px;
        }

        #subjects {
            display: flex;
            flex-direction: column;
            gap: 15px;
            max-height: 300px;
            overflow-y: auto;
            padding-right: 5px;
        }

        /* Custom scrollbar */
        #subjects::-webkit-scrollbar {
            width: 6px;
        }

        #subjects::-webkit-scrollbar-track {
            background: rgba(255, 255, 255, 0.05);
            border-radius: 10px;
        }

        #subjects::-webkit-scrollbar-thumb {
            background: var(--primary-light);
            border-radius: 10px;
        }

        .subject {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            align-items: center;
            padding: 18px;
            background: var(--glass-effect);
            border-radius: var(--border-radius);
            transition: var(--transition);
            position: relative;
            border: 1px solid var(--glass-border);
            animation: fadeIn 0.5s ease-out;
        }

        .subject:hover {
            background: rgba(67, 97, 238, 0.15);
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
        }

        .remove-subject {
            position: absolute;
            right: 10px;
            top: 10px;
            background-color: var(--danger-color);
            color: white;
            border: none;
            width: 10px;
            height: 10px;
            border-radius: 100%;
            display: flex;
            justify-content: center;
            align-items: center;
            cursor: pointer;
            font-size: 20px;
            transition: var(--transition);
            opacity: 0.5;
        }

        .subject:hover .remove-subject {
            opacity: 5;
        }

        .remove-subject:hover {
            transform: scale(1) rotate(90deg);
            background-color: #e53935;
        }

        label {
            font-weight: 500;
            font-size: 14px;
            color: var(--light-color);
            display: block;
            margin-bottom: 8px;
        }

        select, input {
            padding: 12px 15px;
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--border-radius);
            font-family: inherit;
            font-size: 14px;
            transition: var(--transition);
            background: rgba(0, 0, 0, 0.2);
            color: white;
        }

        select {
            min-width: 140px;
            appearance: none;
            background-repeat: no-repeat;
            background-position: right 10px center;
            background-size: 12px;
        }

        input {
            width: 100px;
        }

        select:focus, input:focus {
            outline: none;
	    background-color: #192f37;
	    color: #a9b0b2;
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.3);
        }

        .button-group {
            display: flex;
            gap: 15px;
            flex-wrap: wrap;
        }

        button {
            padding: 10px 10px;
            background-color: var(--primary-color);
            color: white;
            border: none;
            border-radius: var(--border-radius);
            font-family: inherit;
            font-weight: 250;
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            flex: 1;
            min-width: 20px;
        }

        button:hover {
            background-color: var(--primary-light);
            transform: translateY(-3px);
            box-shadow: 0 8px 15px rgba(0, 0, 0, 0.2);
        }

        button:active {
            transform: translateY(0);
        }

        #add-subject {
            background-color: transparent;
            color: var(--light-color);
            border: 1px solid var(--glass-border);
        }

        #add-subject:hover {
            background-color: rgba(255, 255, 255, 0.1);
            border-color: var(--primary-light);
        }

        #result {
            margin-top: 25px;
            padding: 25px;
            border-radius: var(--border-radius);
            text-align: center;
            font-weight: 600;
            font-size: 1.4rem;
            display: none;
            animation: fadeIn 0.5s ease;
            position: relative;
            overflow: hidden;
        }

        #result::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.05), transparent);
            z-index: 0;
        }

        #result span {
            position: relative;
            z-index: 1;
        }

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

        .success {
            background: linear-gradient(135deg, rgba(76, 175, 80, 0.15), rgba(76, 175, 80, 0.05));
            color: #a5d6a7;
            border: 1px solid rgba(76, 175, 80, 0.3);
        }

        .error {
            background: linear-gradient(135deg, rgba(244, 67, 54, 0.15), rgba(244, 67, 54, 0.05));
            color: #ef9a9a;
            border: 1px solid rgba(244, 67, 54, 0.3);
        }

        .grade-info {
            margin-top: 30px;
            font-size: 14px;
            color: #b0bec5;
            text-align: center;
        }

        .grade-info p {
            margin-bottom: 15px;
            font-size: 15px;
            color: var(--accent-color);
        }

        .grade-scale {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 15px;
        }

        .grade-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            background: rgba(0, 0, 0, 0.2);
            padding: 6px 12px;
            border-radius: 20px;
            border: 1px solid rgba(255, 255, 255, 0.1);
            transition: var(--transition);
        }

        .grade-item:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
        }

        .grade-color {
            width: 16px;
            height: 16px;
            border-radius: 4px;
        }

        /* Floating particles background */
        .particles {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -1;
            overflow: hidden;
        }

        .particle {
            position: absolute;
            background: rgba(76, 201, 240, 0.3);
            border-radius: 50%;
            animation: float linear infinite;
        }

        @keyframes float {
            0% {
                transform: translateY(0) rotate(0deg);
                opacity: 1;
            }
            100% {
                transform: translateY(-100vh) rotate(360deg);
                opacity: 0;
            }
        }

        /* Responsive adjustments */
        @media (max-width: 600px) {
            .container {
                padding: 20px;
            }
            
            .subject {
                flex-direction: column;
                align-items: flex-start;
            }
            
            select, input {
                width: 100%;
            }

            .button-group {
                flex-direction: column;
            }

            button {
                width: 100%;
            }
        }

        /* Confetti effect */
        .confetti {
            position: fixed;
            width: 10px;
            height: 10px;
            background-color: #f00;
            opacity: 0;
            z-index: 1000;
            animation: confetti-fall 3s ease-out forwards;
        }

        @keyframes confetti-fall {
            0% {
                transform: translateY(-100px) rotate(0deg);
                opacity: 1;
            }
            100% {
                transform: translateY(100vh) rotate(360deg);
                opacity: 0;
            }
        }