*{
    box-sizing: border-box;
}

body{
    /* background-image: url("https://t4.ftcdn.net/jpg/05/15/77/39/360_F_515773972_IH759yGiOyAdQLtr2qdpMh71QVNely9C.jpg"); */
    
    background: rgba(0, 0, 0, 0.613);
    background-repeat: no-repeat;
    background-size: cover;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    height: 100vh;
    margin: -20px 0 50px;
}

h1{
    font-weight: bold;
    margin: 0;
    font-size: 40px;
}

p{
    font-size: 16px;
    font-weight: 100;
    line-height: 20px;
    letter-spacing: 0.5px;
    margin: 20px 0 30px;
}

span{
    padding-top: 8px;
    padding-bottom: 10px;
    font-size: 14px;
}

.forgot{
    text-decoration: none;
    color: #333;
    margin: 12px 0;
    font-size: 14px;
}

button{
    margin-top: 10px;
    border-radius: 20px;
    border: 1px solid #1DB954;
    background-color: #1DB954;
    color: white;
    padding: 12px 30px;
    letter-spacing: 1px;
    text-transform: uppercase;
    transition: transform 80ms ease-in;
    font-size: 12px;
}

button a{
    text-decoration: none;
    color: white;
}

button:active{
    transform: scale(0.96);
}
button:focus{
    outline: none;
}

button.button{
    background-color: transparent;
    border-color: white;
}

form{
    background-color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 50px;
    height: 100%;
    text-align: center;
    flex-direction: column;
}

input{
    background-color: #eee;
    border: none;
    padding: 12px 15px;
    margin: 10px 0;
    width: 280px;
    cursor: pointer;
}

.container{
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 14px 28px rgba(0,0,0,0.25), 0 10px 10px rgba(0,0,0,0.25);
    position: relative;
    overflow: hidden;
    width: 768px;
    max-width: 100%;
    min-height: 520px;
}

.form-container{
    position: absolute;
    top: 0;
    height: 100%;
    transition: all 0.6s ease-in-out;
}

.log-in-container{
    position: absolute;
    top: 0;
    height: 100%;
    transition: all 0.6s ease-in-out;
    width: 50%;  
    align-items: center;
    justify-content: center;
    text-align: center;
}

.container.right-panel-active .log-in-container{
    transform: translateX(50%);
}

.sign-up-container{
    left: 0;
    width: 50%;
    opacity: 0;
    z-index: 1;
}

.container.right-panel-active .sign-up-container{
    transform: translateX(100%);
    opacity: 1;
    z-index: 5;
    animation: show 0.6s;
}

@keyframes show {
    0% , 49.99%{
        opacity: 0;
        z-index: 1;
    }

    50% , 100%{
        opacity: 1;
        z-index: 5;
    }
    
}

.overlay-container{
    position: absolute;
    top: 0;
    left: 50%;
    width: 50%;
    height: 100%;
    overflow: hidden;
    transition: transform 0.6s ease-in-out;
    z-index: 100;
}


.overlay-panel{
    position: absolute;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    padding: 0 40px;
    text-align: center;
    top: 0;
    height: 100%;
    width: 50%;
    transform: translateX(0);
    transition: transform 0.6s ease-in-out;
}

.overlay-left{
    transform: translateX(-20%);
}

.container.right-panel-active .overlay-left{
    transform: translateX(0);
}

.overlay-right{
    right: 0;
    transform: translateX(0);
}

.container.right-panel-active .overlay-right{
    transform: translateX(-10%);
}

.container.right-panel-active .overlay-container{
    transform: translateX(-100%);
}

.overlay{
    background: black;
    background: -webkit-linear-gradient(to right , black , black);
    background: linear-gradient(to right , black , black);
    background-size: cover;
    background-position: 0 0 ;
    background-repeat: no-repeat;
    color: white;
    position: relative;
    left: -100%;
    height: 100%;
    width: 200%;
    transform: translateX(0);
    transition: transform 0.6s ease-in-out;
}

.container.right-panel-active .overlay{
    transform: translateX(50%);
}