#loginbox {
    margin-top: 30px;
}

    #loginbox > div:first-child {
        padding-bottom: 10px;
    }

.iconmelon {
    display: block;
    margin: auto;
}

#form > div {
    margin-bottom: 25px;
}

    #form > div:last-child {
        margin-top: 10px;
        margin-bottom: 10px;
    }

.panel {
    margin-top: 50px;
    background-color: #ffffff;
}

.panel-body {
    padding-top: 50px;
    background-color: rgba(255,255,255,.3);
}

#particles {
    width: 100%;
    height: 100%;
    overflow: hidden;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    position: absolute;
    z-index: -2;
}

.iconmelon,
.im {
    position: relative;
    width: 150px;
    height: 150px;
    display: block;
    fill: #525151;
}

    .iconmelon:after,
    .im:after {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
    }

/* min-width & max-width */
@media screen and (max-width: 800px) {
    .box-login {
        padding-top: 150px;
    }
}

/* min-width & max-width */
@media screen and (max-width: 500px) {
    .box-login {
        padding-top: 100px;
    }
}

.box-login {
    padding-top: 60px;
}

#preloader {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #F0F0F0;
    opacity: 0.6;
    z-index: 99;
    height: 100%;
    width: 100%;
}


#loader {
    position: fixed;
    left: 50%;
    top: 50%;
    z-index: 1;
    width: 150px;
    height: 150px;
    top: 50%;
    left: 50%;
    margin-left: -100px;
    margin-top: -100px;
    border: 16px solid #f3f3f3;
    border-radius: 50%;
    border-top: 16px solid #3498db;
    width: 120px;
    height: 120px;
    -webkit-animation: spin 2s linear infinite;
    animation: spin 2s linear infinite;
}

@-webkit-keyframes spin {
    0% {
        -webkit-transform: rotate(0deg);
    }

    100% {
        -webkit-transform: rotate(360deg);
    }
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}