mywillpower.org/public/willpower.css

* {
  box-sizing: border-box;
}

html, body {
    margin: 0px;
    height: 100%;
    font-family: sans-serif;
}

.modal.background {
    background-image: url('/tip.jpg');
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    height: 100%;
    width: 100%;
    position: absolute;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal.box {
    background-color: #A9D0F5;
    border-radius: 15px;
    border-style: solid;
    border-color: #FFFFFF;
    text-align: center;
    width: 70%;
    padding: 1em;
    -webkit-animation-name: from_top;
    -webkit-animation-duration: 1.5s;
    animation-name: from_top;
    animation-duration: 1.5s;
    position: absolute;
    z-index: 10;
}

.modal.buttons {
    display: flex;
    gap: 2em;
}

.modal.button {
    border-radius: 5px;
    border: solid;
    color: #000000;
    padding: 15px 0;
    text-align: center;
    transition-duration: 0.3s;
    font-weight: bold;
    font-size: 1em;
    flex: 1;
}

.modal.button:hover {
    border: solid;
    color: #FFFFFF;
    cursor: pointer;
    border-color: #FFFFFF;
}

.modal.button.accept {
    background-color: #04B404;
}

.modal.button.decline {
    background-color: #FF1A1A;
}

.modal.loader {
    border: 16px solid #C9C9C9;
    border-top: 16px solid #000000;
    border-radius: 50%;
    width: 120px;
    height: 120px;
    animation: spin 2s linear infinite;
    margin: -4em auto auto -4em;
    display: flex;
    top: 50%;
    left: 50%;
    position: absolute;
}

#video {
    background-image: url('/willpower.gif');
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    height: 100%;
    width: 100%;
    z-index: 255;
    position: absolute;
    display: none;
}

@-webkit-keyframes from_top {
    from {
        top: -25%;
        opacity: 0;
    }

    to {
        top: 25%;
        opacity: 1;
    }
}

@keyframes from_top {
    from {
        top: -25%;
        opacity: 0;
    }

    to {
        top: 25%;
        opacity: 1;
    }
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}