body {
            margin: 0;
            padding: 0;
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            font-family: Arial, sans-serif;
            color: #fff;
            background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.3)), url('back.jpg');
            background-position: center;
            background-size: cover;
            
        }

        .converter-container {
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(10px);
            padding: 2rem;
            border-radius: 20px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
            width: 100%;
            max-width: 450px;
            text-align: center;
            animation: fadeIn 1s ease-in;
        }

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

        h1 {
            font-size: 2rem;
            margin-bottom: 1.5rem;
            color: #ecf7fe;
            text-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
        }

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

        label {
            display: block;
            font-size: 1rem;
            margin-bottom: 0.5rem;
            color: #e0e0e0;
        }

        select, input[type="number"]{
            width: 90%;
            padding: 0.75rem;
            border: none;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.2);
            color: #fff;
            font-size: 1rem;
            transition: background 0.3s, transform 0.2s;
        }
        input[type = "number"]::placeholder{
            color: rgba(255, 255, 255, 0.5);
        }
        

        select:focus, input[type="number"]:focus {
            outline: none;
            transform: scale(1.02);
            text-align: white;
        }

        select option {
            background: #2a5298;
            color: #fff;
        }

        button {
            width: 100%;
            padding: 0.75rem;
            border: none;
            border-radius: 10px;
            background: linear-gradient(45deg, #ff6b6b, #ff8e53);
            color: #fff;
            font-size: 1.1rem;
            cursor: pointer;
            transition: transform 0.2s, box-shadow 0.2s;
        }

        button:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 15px rgba(255, 107, 107, 0.4);
        }

        #result, #error {
            margin-top: 1.5rem;
            font-size: 1.2rem;
            font-weight: bold;
        }

        #result {
            color: rgb(253, 216, 53);
        }

        #error {
            color: #ff4d4d;
        }

        #loading {
            margin-top: 1.5rem;
            font-size: 1rem;
            color: #e0e0e0;
            display: none;
        }

        @media (max-width: 500px) {
            .converter-container {
                margin: 1rem;
                padding: 1.5rem;
            }

            h1 {
                font-size: 1.5rem;
            }
        }