body {
    background-color: #E4DCCF;
    background-image: url(https://images.pexels.com/photos/5039659/pexels-photo-5039659.jpeg?auto=compress&cs=tinysrgb&w=1260&h=750&dpr=2);
    background-size: cover;
}

.one {
    padding: 20px;
    border-radius: 10px;
}
.all {
    padding: 15px;
    font-family: 'Montserrat', sans-serif;
}
.big {
    display: flex;
    flex-direction: column;
    background-color: #7d9d9c70;
    border: none;
    border-radius: 10px;
    padding: 15px;
    font-size: 20px;
}
.parent {
    display: flex;
    height: 100vh;
    justify-content: center;
    align-items: center;
}
button {
    margin-top: 30px;
    padding: 10px;
    background-color: #e7f6f2b7;
    border: none;
    border-radius: 50%;
}
a {
    text-decoration: none;
    text-transform: uppercase;
    color: #395B64;
    font-size: 15px;
}
.opt {
    padding: 10px;
}