body {
    margin: 0;
}
.loader {
    width: 150px;
    height: 150px;
    text-align: center;
    background-color: #FFFFFF;
    border: 16px solid #ddd;
    border-top: 16px solid #0075FF;
    border-radius: 50%;
    animation: spin 2s infinite linear;
    margin-left: auto;
    margin-right: auto;
    margin-top: 200px;
}
@keyframes spin {
    0% {
        transform: rotate(0);
    }
    100% {
        transform: rotate(360deg);
    }
}
.btns {
    text-align: center;
    margin-top: 30px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 9px;
}
button {
    padding: 5px;
    font-size: 21px;
    color: #333;
    font-weight: bold;
    text-align: center;
    border: 2px solid #ddd;
    outline: none;
    cursor: pointer;
    border-radius: 5px;
    transition: 0.4s;
    text-align: center;
}
button:hover {
    background-color: #ccc;
}
.choose-color {
    width: 80px;
    height: 35px;
    border: 2px solid #ddd;
    border-radius: 5px;
    cursor: pointer;
}