@import url("https://fonts.googleapis.com/css?family=Montserrat:400,700");
*, *::after, *::before {
    margin: 0;
    padding: 0;
    box-sizing: inherit;
}

html {
    height: 100%;
    font-size: 65.2%;
    box-sizing: border-box;
    font-family: Montserrat, sans-serif;
    -webkit-font-smoothing: antialiased;
    font-weight: 400;
}

body {
    height: 100%;
    background: #e9ebee;
    color: #1d2129;
    display: flex;
    align-items: center;
    flex-direction: column;
    justify-content: center;
    perspective: 1500px;
}

h1 {
    font-weight: 700;
    font-size: 3.5em;
    text-align: center;
}

.version {
    position: absolute;
    bottom: 1em;
    right: 2em;
    border-radius: 40px;
    background: #ff4b2b;
    color: #fff;
    font-size: 1em;
    font-weight: bold;
    padding: 0.8em 2em;
    letter-spacing: 1px;
    transition: transform 80ms ease-in;
}

form input {
    background: #eee;
    border: none;
    padding: 12px 15px;
    margin: 8px 0;
    width: 100%;
    font-size: 1.4em;
}

span {
    color: #333;
    font-size: 1.4em;
    display: inline-block;
    margin: 15px auto;
    font-weight: 100;
}

span.remember {
    float: left;
}
span.remember::before {
    content: "";
    display: inline-block;
    width: 1em;
    height: 1em;
    border: 2px solid #999;
    vertical-align: top;
    margin-right: 4px;
}

span.forget {
    float: right;
}

span.clearfix {
    clear: both;
    display: table;
}

span.loginwith {
    display: block;
    width: 100%;
    margin-top: 1em;
    white-space: nowrap;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
}
span.loginwith::before {
    content: "";
    display: inline-block;
    width: 42%;
    height: 1px;
    background: #aaa;
    vertical-align: middle;
    margin-right: 5%;
}
span.loginwith::after {
    content: "";
    display: inline-block;
    width: 45%;
    height: 1px;
    background: #aaa;
    vertical-align: middle;
    margin-left: 5%;
}

span.copy {
    display: block;
    position: absolute;
    bottom: 0;
    font-size: 1em;
}

button {
    display: block;
    margin: 1em auto;
    border-radius: 40px;
    border: 1px solid #ff4b2b;
    background: #f2545f;
    color: #fff;
    font-size: 1.2em;
    font-weight: bold;
    padding: 0.8em 2em;
    letter-spacing: 1px;
    text-transform: uppercase;
    transition: transform 80ms ease-in;
}
button svg {
    vertical-align: middle;
}

button:hover {
    cursor: pointer;
}

button:active {
    transform: scale(0.95);
}

button:focus {
    outline: none;
}

#container {
    width: 95%;
    max-width: 800px;
    height: 500px;
    position: relative;
    border-radius: 20px;
    box-shadow: 0 14px 28px -10px rgba(0, 0, 0, 0.1), 0 10px 10px -10px rgba(0, 0, 0, 0.02);
    transform-style: preserve-3d;
}
#container > div {
    position: absolute;
    width: 50%;
    min-width: 350px;
    height: 100%;
    top: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.content {
    width: 100%;
    padding: 2em 4em;
    text-align: center;
}
.content p {
    font-size: 1.4em;
}

.login {
    left: 0;
    background: #FAFAFA;
    border-radius: 20px 0 0 20px;
}
.login button {
    border-radius: 0px;
    width: 100%;
}
.login svg {
    margin: 1em;
    stroke: #999;
}

.register {
    right: 0;
    z-index: 1;
    border-radius: 0 20px 20px 0;
    background: #FAFAFA;
}
.register button {
    border-radius: 0px;
    width: 100%;
}
.register svg {
    margin: 1em;
    stroke: #999;
}

.page {
    right: 0;
    color: #fff;
    border-radius: 0 20px 20px 0;
    transform-origin: left center;
    transition: -webkit-animation 1s linear;
    transition: animation 1s linear;
    transition: animation 1s linear, -webkit-animation 1s linear;
}
.page button {
    border-color: #fff;
    background: transparent;
}
.page p {
    margin: 2em auto;
}

.front {
    background: linear-gradient(-45deg, #FFCF00 0%, #FC4F4F 100%) no-repeat 0 0/200%;
    z-index: 3;
}

.back {
    background: linear-gradient(135deg, #FC4F4F 0%, #FFCF00 100%) no-repeat 0 0/200%;
    z-index: 2;
}
.back .content {
    transform: rotateY(180deg);
}

.active .front {
    -webkit-animation: rot-front 0.6s ease-in-out normal forwards;
    animation: rot-front 0.6s ease-in-out normal forwards;
}

.active .back {
    -webkit-animation: rot-back 0.6s ease-in-out normal forwards;
    animation: rot-back 0.6s ease-in-out normal forwards;
}

.close .front {
    -webkit-animation: close-rot-front 0.6s ease-in-out normal forwards;
    animation: close-rot-front 0.6s ease-in-out normal forwards;
}

.close .back {
    -webkit-animation: close-rot-back 0.6s ease-in-out normal forwards;
    animation: close-rot-back 0.6s ease-in-out normal forwards;
}

@-webkit-keyframes rot-front {
    from {
        transform: translateZ(2px) rotateY(0deg);
    }
    to {
        transform: translateZ(1px) rotateY(-180deg);
    }
}

@keyframes rot-front {
    from {
        transform: translateZ(2px) rotateY(0deg);
    }
    to {
        transform: translateZ(1px) rotateY(-180deg);
    }
}
@-webkit-keyframes close-rot-front {
    from {
        transform: translateZ(1px) rotateY(-180deg);
    }
    to {
        transform: translateZ(2px) rotateY(0deg);
    }
}
@keyframes close-rot-front {
    from {
        transform: translateZ(1px) rotateY(-180deg);
    }
    to {
        transform: translateZ(2px) rotateY(0deg);
    }
}
@-webkit-keyframes rot-back {
    from {
        transform: translateZ(1px) rotateY(0deg);
    }
    to {
        transform: translateZ(2px) rotateY(-180deg);
    }
}
@keyframes rot-back {
    from {
        transform: translateZ(1px) rotateY(0deg);
    }
    to {
        transform: translateZ(2px) rotateY(-180deg);
    }
}
@-webkit-keyframes close-rot-back {
    from {
        transform: translateZ(2px) rotateY(-180deg);
    }
    to {
        transform: translateZ(1px) rotateY(0deg);
    }
}
@keyframes close-rot-back {
    from {
        transform: translateZ(2px) rotateY(-180deg);
    }
    to {
        transform: translateZ(1px) rotateY(0deg);
    }
}
.active .register .content {
    -webkit-animation: show 0.7s ease-in-out normal forwards;
    animation: show 0.7s ease-in-out normal forwards;
}

.close .register .content {
    -webkit-animation: hide 0.7s ease-in-out normal forwards;
    animation: hide 0.7s ease-in-out normal forwards;
}

.active .login .content {
    -webkit-animation: hide 0.7s ease-in-out normal forwards;
    animation: hide 0.7s ease-in-out normal forwards;
}

.close .login .content {
    -webkit-animation: show 0.7s ease-in-out normal forwards;
    animation: show 0.7s ease-in-out normal forwards;
}

@-webkit-keyframes show {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 0.99;
        transform: scale(0.99);
    }
}

@keyframes show {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 0.99;
        transform: scale(0.99);
    }
}
@-webkit-keyframes hide {
    from {
        opacity: 0.99;
        transform: scale(0.99);
    }
    to {
        opacity: 0;
        transform: scale(0.8);
    }
}
@keyframes hide {
    from {
        opacity: 0.99;
        transform: scale(0.99);
    }
    to {
        opacity: 0;
        transform: scale(0.8);
    }
}