html, body {
    height: 100%;
    min-height: 100%;
}

.bg {
    background: url(bg-water2.gif) no-repeat left top #799fa0;
    background-size: cover;
    height: 100%;
    min-height: 100%;
}

.centered {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    height: 100%;
    min-height: 100%;
}

.tell-block {
    background: rgba(121, 159, 160, 0.8);
    padding-top: 20px;
    padding-bottom: 20px;
    margin-top: 10px;
}

.tell-more {
    margin-top: 20px;
}

.tell-more a {
    color: #fff;
}

textarea.main-text {
    height: 220px;
    box-shadow: 0 0 0 #555;
    font-size: 1.4em;
    background: #eee;
}

textarea.main-text::after {
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    opacity: 0;

    -webkit-transition: opacity 0.3s ease-in-out;
    -moz-transition: opacity 0.3s ease-in-out;
    -ms-transition: opacity 0.3s ease-in-out;
    -o-transition: opacity 0.3s ease-in-out;
    transition: opacity 0.3s ease-in-out;
}

textarea.main-text:focus::after {
    opacity: 1;
}

textarea.main-text:focus {
    box-shadow: 3px 4px 5px #555;
}

.top-img-small {
    display: none;
}

.footer{
    padding: 10px;
    font-size: 0.7em;
    text-align: right;
}

.for-share{
    display: none;
}

@media screen and (max-width: 991px) {
    .tell-block {
        float: right;
    }
}

@media screen and (max-width: 767px) {
    .title{
        margin-top: 35px;
    }

    .bg {
        background-position-y: 60px;
    }

    .centered {
        display: block;
    }

    .top-img-small {
        display: block;
    }

    textarea.main-text {
        background: rgba(255, 255, 255, 0.8);
        margin-top: 20px;
    }
}