body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #f4f4f4;
    overflow: hidden;
    transition: 0.4s all;
}

.buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 5px;
}

#input-box {
    width: 240px;
    font-size: 30px;
    height: 40px;
}

button {
    width: 100%;
    padding: 15px;
    font-size: 1.2em;
    border: none;
    cursor: pointer;
    background: #ddd;
    border-radius: 5px;
    margin-top: 10px;
    transition: 0.2s all;
    color: black;
}

button:hover {
    opacity: 0.7;
}



.red {
    background-color: rgb(255, 107, 107);
    color: white;
}

.yellow {
    background-color: rgb(255, 206, 101);
}

.container {
    width: 250px;
    background: #fff;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: 0.4s all;
}

.dark {
    background-color: rgb(40, 46, 59);
    
    .container {
        background-color: rgb(62, 71, 90);
    }
}

.footer {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: #333333;
    color: white;
    padding: 10px;
}

a {
    text-decoration: none;
    color: #888888;
}