.btnn {
    position: relative;
    display: inline-block;
    margin: 15px;
    padding: 12px 27px;
    text-align: center;
    font-size: 16px;
    letter-spacing: 1px;
    text-decoration: none;
    color: #999999;
    background: #ffffff;
    border: 3px solid #999999;
    cursor: pointer;
    transition: ease-out 0.5s;
    -webkit-transition: ease-out 0.5s;
    -moz-transition: ease-out 0.5s;
}

.btnn.btnn-border-1::after,
.btnn.btnn-border-1::before {
    position: absolute;
    content: "";
    width: 0%;
    height: 0%;
    visibility: hidden;
}

.btnn.btnn-border-1::after {
    bottom: -3px;
    right: -3px;
    border-left: 3px solid #222222;
    border-bottom: 3px solid #222222;
    transition: width .1s ease .1s, height .1s ease, visibility 0s .2s;
}

.btnn.btnn-border-1::before {
    top: -3px;
    left: -3px;
    border-top: 3px solid #222222;
    border-right: 3px solid #222222;
    transition: width .1s ease .3s, height .1s ease .2s, visibility 0s .4s;
}

.btnn.btnn-border-1:hover {
    animation: pulse 1s ease-out .4s;
    color: #222222;
}

.btnn.btnn-border-1:hover::after,
.btnn.btnn-border-1:hover::before {
    width: calc(100% + 3px);
    height: calc(100% + 3px);
    visibility: visible;
    transition: width .1s ease .2s, height .1s ease .3s, visibility 0s .2s;
}

.btnn.btnn-border-1:hover::after {
    transition: width .1s ease .2s, height .1s ease .3s, visibility 0s .2s;
}

.btnn.btnn-border-1:hover::before {
    transition: width .1s ease, height .1s ease .1s;
}

.btnn.btnn-border-2::after,
.btnn.btnn-border-2::before {
    position: absolute;
    content: "";
    width: 0;
    height: 0;
    transition: .5s;
}

.btnn.btnn-border-2::after {
    top: -2px;
    left: -2px;
    border-top: 2px solid transparent;
    border-left: 2px solid transparent;
}

.btnn.btnn-border-2::before {
    bottom: -2px;
    right: -2px;
    border-bottom: 2px solid transparent;
    border-right: 2px solid transparent;
}

.btnn.btnn-border-2:hover {
    background-color:#eee;
    color: #222222;
}

.btnn.btnn-border-2:hover::after,
.btnn.btnn-border-2:hover::before {
    width: calc(50% + 3px);
    height: calc(50% + 3px);
    border-color: #222222;
}

.btnn.btnn-border-3::after,
.btnn.btnn-border-3::before {
    position: absolute;
    content: "";
    width: 0;
    height: 0;
    transition: .5s;
}

.btnn.btnn-border-3::after {
    top: -9px;
    left: -9px;
    border-top: 3px solid transparent;
    border-left: 3px solid transparent;
}

.btnn.btnn-border-3::before {
    bottom: -9px;
    right: -9px;
    border-bottom: 3px solid transparent;
    border-right: 3px solid transparent;
}

.btnn.btnn-border-3:hover {
    color: #222222;
}

.btnn.btnn-border-3:hover::after,
.btnn.btnn-border-3:hover::before {
    width: 30px;
    height: 30px;
    border-color: #222222;
}

.btnn.btnn-border-4::after,
.btnn.btnn-border-4::before {
    position: absolute;
    content: "";
    width: 0;
    height: 0;
    transition: .5s;
}

.btnn.btnn-border-4::after {
    top: -9px;
    left: -9px;
    border-top: 3px solid transparent;
    border-left: 3px solid transparent;
}

.btnn.btnn-border-4::before {
    bottom: -9px;
    right: -9px;
    border-bottom: 3px solid transparent;
    border-right: 3px solid transparent;
}

.btnn.btnn-border-4:hover {
    color: #222222;
}

.btnn.btnn-border-4:hover::after,
.btnn.btnn-border-4:hover::before {
    width: calc(100% + 15px);
    height: calc(100% + 15px);
    border-color: #222222;
}

.btnn.btnn-border-5::after,
.btnn.btnn-border-5::before {
    position: absolute;
    content: "";
    width: 0;
    height: 0;
    transition: .5s;
}

.btnn.btnn-border-5::after {
    top: 0;
    left: 0;
    border-top: 3px solid transparent;
}

.btnn.btnn-border-5::before {
    bottom: 0;
    right: 0;
    border-bottom: 3px solid transparent;
}

.btnn.btnn-border-5:hover {
    color: #222222;
}

.btnn.btnn-border-5:hover::after,
.btnn.btnn-border-5:hover::before {
    width: 100%;
    height: 100%;
    border-color: #222222;
}