wallet-core/extension/style/wallet.css

body {
    background-color: white;
    margin: 0;
    padding: 0;
    font-family: Verdana, sans;
}

header {
    width: 100%;
    height: 100px;
    margin: 0;
    padding: 0;
    border-bottom: 1px solid black;
}

header h1 {
    font-size: 200%;
    margin: 0;
    padding: 0 0 0 120px;
    position: relative;
    top: 50%;
    transform: translateY(-50%);
}

header #logo {
    float: left;
    width: 100px;
    height: 100px;
    padding: 0;
    margin: 0;
    text-align: center;
    border-right: 1px solid black;
    background-image: url(../img/logo.png);
    background-size: 100px;
}

aside {
    width: 100px;
    float: left;
}

section#main {
    margin: 0 0 0 100px;
    padding: 20px;
    border-left: 1px solid black;
    height: 100%;
    max-width: 40em;
}

section#main h1:first-child {
    margin-top: 0;
}

h1 {
    font-size: 160%;
}

h2 {
    font-size: 140%;
}

h3 {
    font-size: 120%;
}

h4, h5, h6 {
    font-size: 100%;
}

.form-row {
  padding-top: 5px;
  padding-bottom: 5px;
}

label {
  padding-right: 1em;
}

label::after {
  content: ":";
}

input.url {
  width: 25em;
}

.formish {
}

.json-key {
   color: brown;
}
.json-value {
   color: navy;
   }
.json-string {
   color: olive;
}

button {
    font-size: 120%;
    padding: 0.5em;
}

button.confirm-pay {
    float: right;
}

/* We use fading to hide slower DOM updates */
.fade {
    -webkit-animation: fade 0.7s;
    animation: fade 0.7s;
    opacity: 1;
}

@-webkit-keyframes fade {
    from {opacity: 0}
    to {opacity: 1}
}
@keyframes fade {
     from {opacity: 0}
     to {opacity: 1}
 }