:root {
    --rem16: 16rem;
    --rem5p5: 5.5rem;
    --rem4p5: 4.5rem;
    --rem3p5: 3.5rem;
    --rem3: 3rem;
    --rem2p5: 2.5rem;
    --rem2: 2rem;
    --rem1p6: 1.6rem;
    --rem1p5: 1.5rem;
    --rem1p4: 1.4rem;
    --white: #ffffff;
    --coeff: 0.8;
}

.form-signin {
    width: 100%;
    max-width: 420px;
    padding: 15px;
    margin: auto;
}

.form-label-group {
    position: relative;
    margin-bottom: 2.5rem;
}

.form-label-group input,
.form-label-group label {
    height: 5rem;
    padding: 1rem 1rem;
}

.form-label-group input:focus {
    box-shadow: none;
}

.form-label-group .form-control {
    border-radius: 0;
    background-color: transparent;
    border-top: none;
    border-left: none;
    border-right: none;
    border-bottom: 1px solid #666;
    font-size: .8rem;
    font-weight: 300;
    font-family: 'Prompt', sans-serif;
    line-height: 1.35;
    color: #888;
}

.form-group textarea {
    border-radius: .5rem;
    background-color: transparent;
    border-top: none;
    border-left: none;
    border-right: none;
    border: 1px solid #666;
    font-size: .8rem;
    font-weight: 300;
    font-family: 'Prompt', sans-serif;
    line-height: 1.35;
    color: #888;
}

.form-group textarea:focus {
    box-shadow: none;
    border: 1px solid #666;
    color: #888;
}

.form-group label {
    font-size: 1rem;
    font-weight: 300;
    text-transform: uppercase;
    font-family: 'Prompt', sans-serif;
}

#captcha, #captcha_code_input {
    border-radius: .5rem;
}

.dark .form-label-group .form-control {
    color: #666;
}

.form-label-group label {
    position: absolute;
    top: 0;
    left: 0;
    display: block;
    width: 100%;
    margin-bottom: 0;
    font-size: calc(var(--rem1p6) * var(--coeff));
    font-weight: 300;
    text-transform: uppercase;
    font-family: 'Prompt', sans-serif;
    line-height: 1.35;
    /* Override default `<label>` margin */
    line-height: 1.5;
    color: #666;
    pointer-events: none;
    cursor: text;
    /* Match the input under the label */
    border: 1px solid transparent;
    border-radius: .25rem;
    transition: all .1s ease-in-out;
}

.dark .form-label-group label {
    color: #666;
}

.form-label-group .form-control::-webkit-input-placeholder {
    color: transparent;
}

.form-label-group .form-control::-moz-placeholder {
    color: transparent;
}

.form-label-group .form-control:-ms-input-placeholder {
    color: transparent;
}

.form-label-group .form-control::-ms-input-placeholder {
    color: transparent;
}

.form-label-group .form-control::placeholder {
    color: transparent;
}

.form-label-group .form-control:not(:-moz-placeholder-shown) {
    padding-top: 2.5rem;
    padding-bottom: 0;
    padding-left: 0;
    padding-right: 0;
}

.form-label-group .form-control:not(:-ms-input-placeholder) {
    padding-top: 2.5rem;
    padding-bottom: 0;
    padding-left: 0;
    padding-right: 0;
}

.form-label-group .form-control:not(:placeholder-shown) {
    padding-top: 2.5rem;
    padding-bottom: 0;
    padding-left: 0;
    padding-right: 0;
}

.form-label-group .form-control:not(:-moz-placeholder-shown)~label {
    padding-top: .25rem;
    padding-bottom: .25rem;
    padding-left: 0;
    padding-right: 0;
    font-size: 1rem;
    color: #444;
}

.form-label-group .form-control:not(:-ms-input-placeholder)~label {
    padding-top: .25rem;
    padding-bottom: .25rem;
    padding-left: 0;
    padding-right: 0;
    font-size: 1rem;
    color: #444;
}

.form-label-group .form-control:not(:placeholder-shown)~label {
    padding-top: .25rem;
    padding-bottom: .25rem;
    padding-left: 0;
    padding-right: 0;
    font-size: 1rem;
    color: #444;
}

.form-label-group .form-control:-webkit-autofill~label {
    padding-top: .25rem;
    padding-bottom: .25rem;
    font-size: 1rem;
    color: #444;
}


/* Fallback for Edge
-------------------------------------------------- */

@supports (-ms-ime-align: auto) {
    .form-label-group {
        display: -ms-flexbox;
        display: flex;
        -ms-flex-direction: column-reverse;
        flex-direction: column-reverse;
    }

    .form-label-group label {
        position: static;
    }

    .form-label-group .form-control::-ms-input-placeholder {
        color: #444;
    }
}