body {
    min-height: 100vh;
    background: linear-gradient(135deg, #1a1a1a 0%, #d90429 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.form-signin label,
.form-signin .form-control::placeholder {
    color: #fff !important;
    opacity: 0.85;
}

.form-signin .form-control {
    background: #222;
    color: #fff;
    border: 1.5px solid #d90429;
}

.form-signin .form-control:focus {
    background: #222;
    color: #fff;
    border-color: #d90429;
    box-shadow: 0 0 0 0.2rem rgba(217,4,41,.25);
}

.form-signin h1, .form-signin h3 {
    color: #fff;
}

.btn-outline-danger {
    color: #d90429;
    border-color: #d90429;
}
.btn-outline-danger:hover {
    background: #d90429;
    color: #fff;
    border-color: #d90429;
}