.container-sm {
    max-width: 40rem;
    background-color: rgba(255, 255, 255, 0.8);
}

footer {
    position: fixed;
    left: 0;
    bottom: 0;
    width: 100%;
    background-color: black;
    color: lightgray;
    text-align: center;
    padding: 3px 0
}

header {
    background-color: white;
}

.color-mode {
    color: black;
}

.btn-submit {
    border-radius: 0;
    border: 1px solid rgba(0, 0, 0, 0.5);
    background-color: rgb(220, 220, 220);
    color: black;
    font-size: 1.1rem;
    padding: 0.5rem;
    padding-left: 1.5rem;
    padding-right: 1.5rem;
    opacity: 1 !important;
}

    .btn-submit:focus {
        border-radius: 0;
        border: 1px solid rgba(0, 0, 0, 0.5);
        background-color: rgb(255, 255, 255);
        color: black;
        font-size: 1.1rem;
        padding: 0.5rem;
        padding-left: 1.5rem;
        padding-right: 1.5rem;
        opacity: 1 !important;
    }

    .btn-submit:hover {
        color: black;
    }

.form-input {
    background-color: unset;
    color: black;
    border-radius: 3px;
    border: 1px solid rgba(0, 0, 0, 0.5);
}

    .form-input:focus {
        background-color: unset;
        color: black;
        border: 1px solid red !important;
        outline: none;
        outline-style: none;
        box-shadow: none;
    }


    .form-input::placeholder {
        color: rgba(0, 0, 0, 0.5);
        opacity: 1; /* Firefox */
    }