style.css

body {
    margin: 0;
    background: url('./image/background.jpg');

}

/*Container's*/
.container {
    display: flex;
    justify-content: center;
    margin-top: 150px;
}
/*buttons*/
.buttons {
    direction: rtl;
    margin-top: 20px;
    margin-right: 30px;
    background: transparent;
}

.a {
    border-bottom: 0 transparent;
    background-color: transparent;
    border-left: 0;
    border-right: 0;
    border-top: 0;
    color: white;
    font-size: 18px;
    margin-left: 15px;
    font-family: 'Poppins';
    font-weight: bold;
    cursor: pointer;
    transition: opacity 0.1s;
}

.test {
    position: relative;
    background: transparent;
    height: 400px;
    width: 350px;
    border: 1px solid rgb(255, 255, 255);
    border-radius: 5px;
    backdrop-filter: blur(20px);
}