/* Reset */
* {
  margin: 0;
  padding: 0;
  vertical-align: baseline;
  box-sizing: border-box;
  border: 0;
  outline: 0;
}


/* General */
body {
  width: 100%;
  font-family: Roboto, sans-serif;
  background: #3b4465;
}

button {
  position: relative;
  width: 160px;
  text-transform: uppercase;
  font-size: 14px;
  background-color: transparent;
}

form {
  position: relative;
  width: 260px;
  height: 280px;
  padding: 20px;
  background: #d7e7f1;
  border-radius: 5px;
}

form label, form input {
  display: block;
  opacity: 0;
}

legend {
  position: absolute;
  top: 0;
  left: -10000px;
}

label {
  padding-top: 15px;
  font-size: 14px;
  color: #a1b4b4;
  letter-spacing: 0.5px;
}

input:not([type="submit"]) {
  width: 220px;
  margin: 5px auto 0;
  padding: 0 15px;
  line-height: 40px;
  font-size: 14px;
  color: #3b4465;
  background: #eef9fe;
  border: 1px solid #cddbef;
  border-radius: 2px;
}

input[type="submit"] {
  float: right;
  width: 120px;
  margin-top: 30px;
  line-height: 40px;
  font-size: 18px;
  border-radius: 20px;
}


/* Buttons and Inputs */
.buttons,
.forms {
  display: flex;
  flex-flow: row nowrap;
  justify-content: center;
  width: 550px;
  margin: 0 auto;
}

.buttons {
  height: 100px;
  padding-top: 70px;
  text-align: center;
}

.forms {
  padding-top: 50px;
}

.log-link,
.sign-link {
  cursor: pointer;
  color: #bbb;
}

.log-link.login-button-active,
.sign-link.signup-button-active {
  cursor: default;
  color: #fff;
}

.login-underline,
.signup-underline {
  position: absolute;
  top: 35px;
  left: 30px;
  height: 2px;
  width: 100px;
  opacity: 0;
  background: #c8dfed;
}

.login-underline.login-button-active {
  animation: loginUnderlineActive .2s linear .1s forwards;
  transform-origin: right;
}

.login-underline.signup-button-active {
  animation: loginUnderlineInactive .3s linear forwards;
  transform-origin: right;
}

.signup-underline.signup-button-active {
  animation: signupUnderlineActive .2s linear .1s forwards;
  transform-origin: left;
}

.signup-underline.login-button-active {
  animation: signupUnderlineInactive .3s linear forwards;
  transform-origin: left;
}

.login-button-active {
  animation: buttonsMoveToRight .3s linear forwards;
}

.signup-button-active {
  animation: buttonsMoveToLeft .3s linear forwards;
}

.login-form.login-button-active label,
.login-form.login-button-active input {
  animation: fielsetSlideToRight .5s linear 0.25s forwards;
}

.signup-form.signup-button-active label,
.signup-form.signup-button-active input {
  animation: fieldsetSlideToLeft .5s linear 0.25s forwards;
}

.login-form input[type="submit"] {
  color: #fbfdff;
  background: #136e11;
}

.signup-form input[type="submit"] {
  color: #a7e245;
  background: #136e11;
  box-shadow: inset 0 0 0 2px #a7e245;
}

.login-form {
  animation: loginToBottom .4s linear forwards;
}

.signup-form {
  animation: signUpToBottom .4s linear forwards;
}

.login-form.login-button-active {
  animation: loginToTop .4s linear forwards;
}

.signup-form.signup-button-active {
  animation: signUpToTop .4s linear forwards;
}


/* Animations */
@keyframes loginUnderlineActive {
  0% {
    transform: scale(0);
    opacity: 1;
  }
  
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes signupUnderlineActive {
  0% {
    transform: scale(0);
    opacity: 1;
  }
  
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes loginUnderlineInactive {
  0% {
    transform: scale(1);
    opacity: 1;
  }
  
  100% {
    transform: scale(0);
    opacity: 1;
  }
}

@keyframes signupUnderlineInactive {
  0% {
    transform: scale(1);
    opacity: 1;
  }
  
  100% {
    transform: scale(0);
    opacity: 1;
  }
}

@keyframes buttonsMoveToRight {
  0% {
    transform: translate(0);
  }
  
  100% {
    transform: translate(50px);
  }
}

@keyframes buttonsMoveToLeft {
  0% {
    transform: translate(0);
  }
  
  100% {
    transform: translate(-50px);
  }
}

@keyframes fielsetSlideToRight {
  0% {
    transform: translate(-15px);
    opacity: 0;
  }
  
  100% {
    transform: translate(0);
    opacity: 1;
  }
}

@keyframes fieldsetSlideToLeft {
  0% {
    transform: translate(15px);
    opacity: 0;
  }
  
  100% {
    transform: translate(0);
    opacity: 1;
  }
}

@keyframes loginToBottom {
  0% {
    transform: translate(100px);
    z-index: 10;
    background-color: #fff;
  }
  
  49% {
    transform: translate(0);
    z-index: 10;
  }
  
  50% {
    transform: translate(0);
    z-index: 1;
  }
  
  100% {
    transform: translate(100px, 20px);
    z-index: 1;
    background-color: #d7e7f1;
  }
}

@keyframes signUpToBottom {
  0% {
    transform: translate(-100px);
    z-index: 10;
    height: 360px;
    background-color: #fff;
  }
  
  49% {
    transform: translate(0);
    z-index: 10;
  }
  
  50% {
    transform: translate(0);
    z-index: 1;
  }
  
  100% {
    transform: translate(-100px, 20px);
    z-index: 1;
    height: 280px;
    background-color: #d7e7f1;
  }
}

@keyframes loginToTop {
  0% {
    transform: translate(100px, 20px);
    z-index: 1;
    background-color: #d7e7f1;
  }
  
  49% {
    transform: translate(0);
    z-index: 1;
  }
  
  50% {
    transform: translate(0);
    z-index: 10;
  }
  
  100% {
    transform: translate(100px);
    z-index: 10;
    background-color: #fff;
  }
}

@keyframes signUpToTop {
  0% {
    transform: translate(-100px, 20px);
    z-index: 1;
    background-color: #d7e7f1;
  }
  
  25% {
    height: 280px;
  }
  
  49% {
    transform: translate(0);
    z-index: 1;
  }
  
  50% {
    transform: translate(0);
    z-index: 10;
  }
  100% {
    transform: translate(-100px);
    z-index: 10;
    height: 360px;
    background-color: #fff;
  }
}