:root{
    --mainColor: #0a169c;
    --text: #fff;
    --input-color: #000;
    --valid-input-color: #000;
}

#form-feedback {
    border-radius: 39px;
    max-width: 560px;
    margin: 0 auto;
    font-family: Arial;
    box-shadow: 0px 0px 5px #0000007d;
}

.form-feedback-content {
    max-width: 400px;
    margin: 0 auto;
    padding: 0 40px 40px;
    box-sizing: border-box;
}

.form-feedback-title {
    text-align: center;
    padding: 30px 15px;
    font-size: 30px;
    background: var(--mainColor);
    color: var(--text);
    text-transform: uppercase;
    margin: 30px 0;
    line-height: 1.2;
    letter-spacing: 2px;
}
@media(max-width: 767px){
    .form-feedback-title {
        font-size: 24px;
    }
}

#form-feedback input {
    font-size: 16px;
    margin-bottom: 16px;
    width: 100%;
    padding: 12px 15px;
    box-sizing: border-box;
    border: 1px solid var(--mainColor);
    border-radius: 4px;
    color: var(--input-color);
    line-height: 1;
    background: #f7f7f7;
    box-shadow: 3px 3px 6px #00000030;
    font-family: Arial;
    background: #fff;
}
#form-feedback input:focus{
    outline: 1px solid var(--mainColor);
}

.form-feedback-btn {
    background: var(--mainColor);
    color: var(--text);
    width: 80%;
    margin: auto;
    display: flex;
    padding: 14px;
    font-weight: 700;
    font-size: 16px;
    border: none;
    cursor: pointer;
    text-transform: uppercase;
    border-radius: 4px;
    font-family: Arial;
    letter-spacing: 1px;
    box-shadow: 3px 3px 6px #00000030;
    text-align: center;
    justify-content: center;
}

input.error {
    margin-bottom: 5px!important;
    background: #ff000020!important;
    position: relative;
    color: var(--valid-input-color)!important;
}

input.error::placeholder{
    color: #000;
}

label.error {
    font-family: Arial;
    color: red;
    font-size: 14px;
    text-align: center;
    font-weight: 600;
    margin-bottom: 10px;
    display: block;
}

.phone + label.error{
    margin: 5px 0 0!important;
}

input.valid {
    background: #00ef0030!important;
    color: var(--valid-input-color)!important;
}