@import url('https://fonts.googleapis.com/css2?family=Open+Sans:ital,wght@0,300..800;1,300..800&display=swap');

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;   
  font-family: 'Open Sans', sans-serif;
}

body {
  background: #f6f5f7;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  height: 100vh;
}

.container {
  background-color: #fff;
  border-radius: 20px;
  box-shadow: 0 14px 28px rgba(0,0,0,0.25), 
              0 10px 10px rgba(0,0,0,0.22);
  position: relative;
  overflow: hidden;
  width: 768px;
  max-width: 100%;
  min-height: 480px;
}

.container p {
  font-size: 14px;
  font-weight: 100;
  line-height: 20px;
  letter-spacing: 0.5px;
  margin: 20px 0 30px;
}

.container span {
  font-size: 12px;
}

.container a {
  color: #333;
  font-size: 14px;
  text-decoration: none;
  margin: 15px 0;
}

.container button {
  border-radius: 10px;
  border: 1px solid #ff4b2b;
  background-color: #ff4b2b;
  color: #fff;
  font-size: 12px;
  font-weight: bold;
  padding: 10px 35px;
  letter-spacing: 1px;
  text-transform: uppercase;
  transition: transform 80ms ease-in;
  margin-top: 10px;
  cursor: pointer;
}

.container button.ghost {
    background-color: transparent;
    border-color: #fff;
}

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

.container form input {
  background-color: #eee;
  border: none;
  padding: 12px 15px;
  margin: 8px 0;
  width: 100%;
  outline: none;
}

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

.form-container.sign-in {
  left: 0;
  width: 50%;
  z-index: 2;
}

.container.active .form-container.sign-in {
  transform: translateX(100%);
}

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

.container.active .form-container.sign-up {
  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;
  }
}

.social-container {
  margin: 20px 0;
}

.social-container a {
  border: 1px solid #ddd;
  border-radius: 50%;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  margin: 0 5px;
  height: 40px;
  width: 40px;
}

.overlay-container {
  position: absolute;
  top: 0;
  left: 50%;
  width: 50%;
  height: 100%;
  overflow: hidden;
  transition: all 0.6s ease-in-out;
  z-index: 1000;
}

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

.overlay {
  background: #ff416c;
  background: linear-gradient(to right, #ff4b2b, #ff416c);
  color: #fff;
  position: relative;
  left: -100%;
  height: 100%;
  width: 200%;
  transform: translateX(0);
  transition: transform 0.6s ease-in-out;
}

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

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

.overlay-panel.overlay-left {
  transform: translateX(-200%);
}

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

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

.container.active .overlay-panel.overlay-right {
  transform: translateX(200%);
}