body{
    margin: 0;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    height: 100vh;
    justify-content: center;
    align-items: center;
    display: flex;
}
.loader{
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}
.spinner{
    width: 50px;
    height: 50px;
    border: 5px solid #f3f3f3;
    border-top-color: #000000;
    border-radius: 50%;
    animation: spin 2s linear infinite;
}

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