:root {
    --background: #fff;
    --liquid: #242424;
    --font-color: #fff;
}

body {
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--background);
    min-width: 300px;
    min-height: 400px;
}

label, h3 {
    color: var(--font-color);
    font-family: 'Lucida Sans', 'Lucida Sans Regular', 
    'Lucida Grande', 'Lucida Sans Unicode', Geneva, Verdana, sans-serif;
}

.label-hidden{
    font-size: small;
    opacity: 0;
    text-align: start;
    margin-bottom: 0px;
    transition: 500ms;
}

.inputStyle{
    height: 32px;
    border-radius: 30px;
    margin-bottom: 20px;
    border: none;
    padding: 10px;
    width: 250px;
}

.btLG{
    background-color: var(--background);
    color: var(--liquid);
    text-align: center;
    height: 90px;
    font-weight: bold;
    border: none;
    margin-top: 20px;
    border-radius: 50%;
    width: 90px;
    margin-bottom: 20px;
    transition: transform 500ms;
}

.btLG:hover{
    cursor: pointer;
    transform: scale(1.1);
}

.wrapper{
    position: relative;
    overflow: hidden;
    width: 300px;
    height: 400px;
    border: 5px solid var(--liquid);
    background-color: var(--liquid);
    padding: 20px;
    text-align: center;
}

.wrapper::after {
    content: "";
    position: absolute;
    background-color: var(--background);
    height: 200%;
    width: 200%;
    bottom: -50%;
    left: -50%;
    border-radius: 37%;
    animation: spin 6s infinite cubic-bezier(0, 0.3, 0.58, 1);
}

@keyframes spin {
  from {
    transform: translateY(0) rotate(0deg);
  }
  to {
    transform: translateY(-80%) rotate(360deg);
  }

}