* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    background-color: #121212;
    color: #ffffff;
}
.box {
    width: 500px;
    min-height: 400px;
    background-color: #1e1e1e;
    border-radius: 15px;
    /* box-shadow: 0 0 20px rgba(0,0,0,0.8); */
}
.form-control,
.form-select {
    background-color: #2a2a2a;
    color: #fff;
    border: 1px solid #444;
}
.form-control::placeholder {
    color: #aaa;
}
.btn-primary {
    background-color: #0d6efd;
    border: none;
}