.blood-form {
    background-color: #eee;
    padding: 50px 40px;
    border-radius: 5px;
    width: 70%;
    margin: auto
}

.form-control{
    display: flex;
    justify-content: space-around;
}

.form-group {
    flex-basis: 46%;
}

.blood-form form label {
    cursor: pointer;
    display: inline-block;
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
    font-weight: bolder;
    color: red;
}

.form-group select {
    display: block;
    width: 100%;
    cursor: pointer;
    padding: 12px 12px;
    border-radius: 4px;
    border-color: red;
    outline-color: red;
    color: rgba(255, 0, 0, 0.766);
}
.search-btn{
    display: block;
    width:100px;
    cursor: pointer;
    font-size: 1rem;
    margin: 25px auto 0 auto;
    background:red;
    color: #fff;
    border:0;
    padding: 8px 12px;
    text-align: center;
    border-radius: 6px;
}
@media only screen and (max-width:900px){
    .blood-form{
        width:90%;
    }
    .form-control{
        flex-direction: column;
    }   
    .form-group{
        flex-basis: 100%;
        margin-bottom: 20px;
    }
    .search-btn{
        margin:0 auto;
    }
}