:root {
  --default-font: "Open Sans", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "Liberation Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
  --heading-font: "Montserrat", sans-serif;
  --nav-font: "Poppins", sans-serif;
  --background-color: #ffffff;
  --default-color: #212529;
  --heading-color: #32353a;
  --accent-color: #2218A7;
  --contrast-color: #ffffff;
}

*, :after, :before {
  box-sizing: border-box;
}

.clearfix:after, .clearfix:before {
  content: '';
  display: table;
}

.clearfix:after {
  clear: both;
  display: block;
}

a {
  color: var(--accent-color);
  text-decoration: none;
}

.login-wrap {
  width: 100%;
  margin: 100px auto;
  max-width: 525px;
  position: relative;
  background: var(--background-color);
  box-shadow: 0 12px 15px 0 rgba(0,0,0,.24), 0 17px 50px 0 rgba(0,0,0,.19);
  border-radius: 20px;
}

.login-html {
  width: 100%;
  height: 100%;
  position: absolute;
  padding: 70px 50px 50px 50px;
  border-radius: 20px;
}

.login-html .sign-in-htm,
.login-html .sign-up-htm,
.login-html .change-pwd-htm {
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  position: absolute;
  transform: rotateY(180deg);
  backface-visibility: hidden;
  transition: all .4s linear;
}

.login-html .sign-in,
.login-html .sign-up,
.login-html .change-pwd {
  display: none;
}

.login-html .tab,
.login-form .group .label,
.login-form .group .button {
  text-transform: uppercase;
}

.login-html .tab {
  font-family: var(--nav-font);
  font-size: 18px;
  margin-right: 5px;
  padding-bottom: 5px;
  margin: 0 5px 10px 0;
  display: inline-block;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  color: var(--default-color);
}

.login-html .sign-in:checked + .tab,
.login-html .sign-up:checked + .tab,
.login-html .change-pwd:checked + .tab {
  color: var(--accent-color);
  border-color: var(--accent-color);
}

.login-form {
  min-height: 345px;
  position: relative;
  perspective: 1000px;
  transform-style: preserve-3d;
}

.login-form .group {
  margin-bottom: 15px;
}

.login-form .group .label,
.login-form .group .input,
.login-form .group .button {
  width: 100%;
  display: block;
}

.login-form .group .input,
.login-form .group .button {
  border: none;
  padding: 15px 20px;
  border-radius: 25px;
  background: var(--background-color);
  border: 1px solid var(--accent-color);
  color: var(--default-color);
}

.login-form .group input[data-type="password"] {
  text-security: circle;
  -webkit-text-security: circle;
}

.login-form .group .label {
  color: var(--heading-color);
  font-size: 12px;
  font-family: var(--default-font);
}

.login-form .group .button {
  background: var(--accent-color);
  color: var(--contrast-color);
  cursor: pointer;
  font-family: var(--nav-font);
}

.login-form .group label .icon {
  width: 15px;
  height: 15px;
  border-radius: 2px;
  position: relative;
  display: inline-block;
  background: var(--background-color);
  border: 1px solid var(--accent-color);
}

.login-form .group label .icon:before,
.login-form .group label .icon:after {
  content: '';
  width: 10px;
  height: 2px;
  background: var(--accent-color);
  position: absolute;
  transition: all .2s ease-in-out 0s;
}

.login-form .group label .icon:before {
  left: 3px;
  width: 5px;
  bottom: 6px;
  transform: scale(0) rotate(0);
}

.login-form .group label .icon:after {
  top: 6px;
  right: 0;
  transform: scale(0) rotate(0);
}

.login-form .group .check:checked + label {
  color: var(--accent-color);
}

.login-form .group .check:checked + label .icon {
  background: var(--accent-color);
}

.login-form .group .check:checked + label .icon:before {
  transform: scale(1) rotate(45deg);
}

.login-form .group .check:checked + label .icon:after {
  transform: scale(1) rotate(-45deg);
}

.login-html .sign-in:checked + .tab + .sign-up + .tab + .change-pwd + .tab + .login-form .sign-in-htm {
  transform: rotate(0);
}

.login-html .sign-up:checked + .tab + .change-pwd + .tab + .login-form .sign-up-htm {
  transform: rotate(0);
}

.login-html .change-pwd:checked + .tab + .login-form .change-pwd-htm {
  transform: rotate(0);
}

.error-message {
    color: red;
    font-size: 0.9em;
    margin-top: 5px;
}

.hr {
  height: 2px;
  margin: 60px 0 50px 0;
  background: var(--accent-color);
  opacity: 0.2;
}

.foot-lnk {
  text-align: center;
  font-family: var(--default-font);
  color: var(--default-color);
}