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

body{
    font-family: 'Poppins', sans-serif;
    background-color: #f5f5f5;
}

.container{
   display : flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    flex-direction: column;
}

.container h1{
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.container input[type="number"]{
    width: 400px;
    display: block;
    background-color: #fff;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.container input[type="checkbox"]{
    margin-top: 20px;
}   

.container button{
    width: 100%;
    display: block;
    max-width: 500px;
    background-color: #f72585;
    color: #fff;
    padding: 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    margin-top: 20px;
}   

#copy {
    
    background-color: lightcoral;
}

.hidden {
    visibility: hidden;
}

.copied {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 20px;
    color : green;
    font-weight: 800;
    transition: all 1.5s;
    opacity: 0;
    margin-top: -2px;
}

.copied.active {
    opacity: 1;
}