body {
    font-family: 'Arial', sans-serif;
    background-color: #f4f4f9;
    color: #333;
}

header h3 {
    font-size: 1.2em;
    color: #555;
}

header a {
    color: #ff5733;
    text-decoration: none;
    transition: color 0.3s ease-in-out;
}

header a:hover {
    color: #c70039;
}

h1 {
    color: #2d2d2d;
    font-size: 2.5em;
}

footer {
    background-color: #007bff;
    font-size: 1em;
    box-shadow: 0 -2px 4px rgba(0, 0, 0, 0.1);
    position:relative;
    overflow:hidden;
}

#result {
    font-weight: bold;
    font-size: 1.5em;
}

.sliding-text {
    display: flex;
    animation: slide 15s linear infinite;
}

.sliding-text span {
    flex-shrink: 0;
    padding: 0 50px;
    white-space: nowrap;
    font-size: 1.2em;
}

@keyframes slide {
    0% { transform: translateX(100%); }
    100% { transform: translateX(-100%); }
}

/* Responsive Design */
@media (max-width: 768px) {
    h1 {
        font-size: 2em;
    }

    #result {
        font-size: 1.3em;
    }

    .btn-group {
        flex-wrap: wrap;
    }

    /*.number-btn {
        margin-bottom: 5px;
    }*/

    .number-btn {
        font-size: 1.8rem; /* Increase the font size */
        padding: 10px 20px; /* Adjust padding to maintain button size */
        margin: 8px; /* Add some margin between buttons */
    }
    
}

@media (max-width: 480px) {
    header h3 {
        font-size: 1em;
    }

    h1 {
        font-size: 1.8em;
    }

    #result {
        font-size: 1.1em;
    }

    .sliding-text span {
        font-size: 1em;
    }
}