OpenAuth_server/Frontend/src/components/theme/theme.css

:root {
   --primary: #1e88e5;
   --mdc-theme-primary: var(--primary);
   --mdc-theme-primary-bg: var(--mdc-theme--primary);
   --mdc-theme-on-primary: white;
   --error: #ff2f00;
   --border-color: #ababab;

   --default-font-size: 1.05rem;
}

* {
   font-family: "Roboto", "Helvetica", sans-serif;
}

html,
body {
   margin: 0;
   color: #636363;
   position: relative;
   background: #eee;
   height: 100%;
   font-size: var(--default-font-size);
   min-width: 100vw;
   min-height: 100vh;
   box-sizing: border-box;
}

.group {
   position: relative;
   margin-bottom: 24px;
   min-height: 45px;
}

.floating > input {
   font-size: 1.2rem;
   padding: 10px 10px 10px 5px;
   appearance: none;
   -webkit-appearance: none;
   display: block;
   background: #fafafa;
   background: unset;
   color: #636363;
   width: 100%;
   border: none;
   border-radius: 0;
   /* border-bottom: 1px solid #757575; */
   border-bottom: 1px solid var(--border-color);
   box-sizing: border-box;
}

.floating > input:focus {
   outline: none;
}

/* Label */

.floating > label {
   color: #999;
   font-size: 18px;
   font-weight: normal;
   position: absolute;
   pointer-events: none;
   left: 5px;
   top: 10px;
   transition: all 0.2s ease;
}

/* active */

.floating > input:focus ~ label,
.floating > input.used ~ label {
   top: -0.75em;
   transform: scale(0.75);
   left: -2px;
   /* font-size: 14px; */
   color: var(--primary);
   transform-origin: left;
}

/* Underline */

.bar {
   position: relative;
   display: block;
   width: 100%;
}

.bar:before,
.bar:after {
   content: "";
   height: 2px;
   width: 0;
   bottom: 1px;
   position: absolute;
   background: var(--primary);
   transition: all 0.2s ease;
}

.bar:before {
   left: 50%;
}

.bar:after {
   right: 50%;
}

/* active */

.floating > input:focus ~ .bar:before,
.floating > input:focus ~ .bar:after {
   width: 50%;
}

/* Highlight */

.highlight {
   position: absolute;
   height: 60%;
   width: 100px;
   top: 25%;
   left: 0;
   pointer-events: none;
   opacity: 0.5;
}

/* active */

.floating > input:focus ~ .highlight {
   animation: inputHighlighter 0.3s ease;
}

/* Animations */

@keyframes inputHighlighter {
   from {
      background: var(--primary);
   }

   to {
      width: 0;
      background: transparent;
   }
}

.btn {
   position: relative;

   display: block;
   margin: 2rem;
   padding: 0 1em;

   overflow: hidden;

   border-width: 0;
   outline: none;
   border-radius: 4px;
   box-shadow: 0 1px 4px rgba(0, 0, 0, 0.6);

   background-color: #cccccc;
   color: #ecf0f1;

   transition: background-color 0.3s;

   height: 48px;

   text-transform: uppercase;
   font-weight: 500;
   font-size: 1.2rem;
}

.btn:hover,
.btn:focus {
   filter: brightness(90%);
}

.btn > * {
   position: relative;
}

.btn span {
   display: block;
   padding: 12px 24px;
}

.btn:before {
   content: "";

   position: absolute;
   top: 50%;
   left: 50%;

   display: block;
   width: 0;
   padding-top: 0;

   border-radius: 100%;

   background-color: rgba(236, 240, 241, 0.3);

   -webkit-transform: translate(-50%, -50%);
   -moz-transform: translate(-50%, -50%);
   -ms-transform: translate(-50%, -50%);
   -o-transform: translate(-50%, -50%);
   transform: translate(-50%, -50%);
}

.btn:active:before {
   width: 120%;
   padding-top: 120%;

   transition: width 0.2s ease-out, padding-top 0.2s ease-out;
}

.loader_box {
   width: 64px;
   height: 64px;
   margin: auto;
}

.loader {
   display: inline-block;
   position: relative;
   z-index: 100;
}

.loader:after {
   content: " ";
   display: block;
   width: 46px;
   height: 46px;
   margin: 1px;
   border-radius: 50%;
   border: 5px solid var(--primary);
   border-color: var(--primary) transparent var(--primary) transparent;
   animation: loader 1.2s linear infinite;
}

@keyframes loader {
   0% {
      transform: rotate(0deg);
   }

   100% {
      transform: rotate(360deg);
   }
}

#content {
   height: 100%;
}