.sub-form-st{
    max-width:500px;
    margin-left:auto;
}

.sub-form-st h3{
    font-size:26px;
    font-weight:700;
    margin-bottom:6px;
    color:#222;
    line-height:1.3;
}

.sub-form-st p{
    font-size:15px;
    color:#666;
    margin-bottom:15px;
}

.footer-subscribe-form{
    display:flex;
    align-items:center;
    border:1.5px solid #52b7cd;
    border-radius:8px;
    overflow:hidden;
    background:#fff;
    box-shadow:0 4px 12px rgba(0,0,0,.06);
}

.footer-subscribe-form input{
    flex:1;
    border:none;
    outline:none;
    padding:0 16px;
    height:46px;
    font-size:15px;
    background:transparent;
}

.footer-subscribe-form input::placeholder{
    color:#888;
}

.footer-subscribe-form button{
    border:none;
    background:#52b7cd;
    color:#fff;
    font-weight:600;
    padding:0 22px;
    height:46px;
    font-size:15px;
    transition:.3s;
}

.footer-subscribe-form button:hover{
    background:#3ca4ba;
}

#subscribe-message{
    margin-top:10px;
    font-size:14px;
}

@media(max-width:768px){

    .sub-form-st{
        max-width:100%;
        text-align:center;
        margin-top:25px;
    }

    .sub-form-st h3{
        font-size:22px;
    }

    .footer-subscribe-form{
        flex-direction:column;
        border:none;
        box-shadow:none;
        gap:10px;
    }

    .footer-subscribe-form input,
    .footer-subscribe-form button{
        width:100%;
        height:46px;
        border-radius:8px;
        border:1.5px solid #52b7cd;
    }
}