Very basic initial UI implementation

src/components/GoogleLogin.vue

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+<template>
+<div class="soc-wrapper">
+<button class="gsi-material-button">
+  <div class="gsi-material-button-state"></div>
+  <div class="gsi-material-button-content-wrapper">
+    <div class="gsi-material-button-icon">
+      <svg version="1.1" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" xmlns:xlink="http://www.w3.org/1999/xlink" style="display: block;">
+        <path fill="#EA4335" d="M24 9.5c3.54 0 6.71 1.22 9.21 3.6l6.85-6.85C35.9 2.38 30.47 0 24 0 14.62 0 6.51 5.38 2.56 13.22l7.98 6.19C12.43 13.72 17.74 9.5 24 9.5z"></path>
+        <path fill="#4285F4" d="M46.98 24.55c0-1.57-.15-3.09-.38-4.55H24v9.02h12.94c-.58 2.96-2.26 5.48-4.78 7.18l7.73 6c4.51-4.18 7.09-10.36 7.09-17.65z"></path>
+        <path fill="#FBBC05" d="M10.53 28.59c-.48-1.45-.76-2.99-.76-4.59s.27-3.14.76-4.59l-7.98-6.19C.92 16.46 0 20.12 0 24c0 3.88.92 7.54 2.56 10.78l7.97-6.19z"></path>
+        <path fill="#34A853" d="M24 48c6.48 0 11.93-2.13 15.89-5.81l-7.73-6c-2.15 1.45-4.92 2.3-8.16 2.3-6.26 0-11.57-4.22-13.47-9.91l-7.98 6.19C6.51 42.62 14.62 48 24 48z"></path>
+        <path fill="none" d="M0 0h48v48H0z"></path>
+      </svg>
+    </div>
+    <span class="gsi-material-button-contents">Sign in with Google</span>
+    <span style="display: none;">Sign in with Google</span>
+  </div>
+</button>
+</div>
+</template>
+
+<style scoped>
+.soc-wrapper {
+    width: 100%;
+}
+
+.gsi-material-button {
+  display: block;
+  margin: 0px auto;
+  -moz-user-select: none;
+  -webkit-user-select: none;
+  -ms-user-select: none;
+  -webkit-appearance: none;
+  background-color: WHITE;
+  background-image: none;
+  border: 1px solid var(--grey-light);
+  -webkit-border-radius: 5px;
+  border-radius: 5px;
+  -webkit-box-sizing: border-box;
+  box-sizing: border-box;
+  color: #1f1f1f;
+  cursor: pointer;
+  font-family: 'Roboto', arial, sans-serif;
+  font-size: 14px;
+  height: 46px;
+  letter-spacing: 0.25px;
+  outline: none;
+  overflow: hidden;
+  padding: 0 12px;
+  position: relative;
+  text-align: center;
+  -webkit-transition: background-color .218s, border-color .218s, box-shadow .218s;
+  transition: background-color .218s, border-color .218s, box-shadow .218s;
+  vertical-align: middle;
+  white-space: nowrap;
+  width: auto;
+  width: 240px;
+  min-width: min-content;
+}
+
+.gsi-material-button .gsi-material-button-icon {
+  height: 20px;
+  margin-right: 12px;
+  min-width: 20px;
+  width: 20px;
+}
+
+.gsi-material-button .gsi-material-button-content-wrapper {
+  -webkit-align-items: center;
+  align-items: center;
+  display: flex;
+  -webkit-flex-direction: row;
+  flex-direction: row;
+  -webkit-flex-wrap: nowrap;
+  flex-wrap: nowrap;
+  height: 100%;
+  justify-content: space-between;
+  position: relative;
+  width: 100%;
+}
+
+.gsi-material-button .gsi-material-button-contents {
+  -webkit-flex-grow: 1;
+  flex-grow: 1;
+  font-family: 'Roboto', arial, sans-serif;
+  font-weight: 500;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  vertical-align: top;
+}
+
+.gsi-material-button .gsi-material-button-state {
+  -webkit-transition: opacity .218s;
+  transition: opacity .218s;
+  bottom: 0;
+  left: 0;
+  opacity: 0;
+  position: absolute;
+  right: 0;
+  top: 0;
+}
+
+.gsi-material-button:disabled {
+  cursor: default;
+  background-color: #ffffff61;
+  border-color: #1f1f1f1f;
+}
+
+.gsi-material-button:disabled .gsi-material-button-contents {
+  opacity: 38%;
+}
+
+.gsi-material-button:disabled .gsi-material-button-icon {
+  opacity: 38%;
+}
+
+.gsi-material-button:not(:disabled):active .gsi-material-button-state, 
+.gsi-material-button:not(:disabled):focus .gsi-material-button-state {
+  background-color: #303030;
+  opacity: 12%;
+}
+.gsi-material-button:not(:disabled):hover .gsi-material-button-state {
+  background-color: #303030;
+  opacity: 8%;
+}
+
+</style>