html,
body {
    height: 100% !important;
}

body {
    background-position: center center !important;
    overflow: hidden !important;
    -webkit-background-size: cover !important;
    -moz-background-size: cover !important;
    -o-background-size: cover !important;
    background-size: cover !important;
}

body.orangeStyle {
    background-image: url(../img/bg_orange.jpg) !important;
}

body.blueStyle {
    background-image: url(../img/bg_blue.jpg) !important;
}

body.purpleStyle {
    background-image: url(../img/bg_purple.jpg) !important;
}

.orange a {
    color: #F75000;
}

.blue a {
    color: #0066FF;
}

.purple a {
    color: #9D22C8;
}

.font-black {
    color: black;
}

.font-white {
    color: white;
}

.letter-spacing {
    letter-spacing: .2rem;
}

.btn-blue {
    background-color: #0066FF;
}

.btn-orange {
    background-color: #F75000;
}

.btn-purple {
    background-color: #9D22C8;
}

.font-noto {
    font-family: 'Noto Sans TC', sans-serif;
}

.text-shadow {
    text-shadow: 0px 3px 6px #9D9D9D;
}

.box-shadow {
    box-shadow: 0px 3px 6px #9D9D9D;
}

.purpleStyle .login-box {
    background: rgba(255, 255, 255, 0.3);
    padding: 35px;
    min-width: 430px;
    border-radius: 8px;
    box-shadow: 1px 1px 10px #ccc;
}