style.css

html {
    min-height: 100%;
    height: auto;
}

body {
    background: #fafafa;
    background-image: url("assets/background.jpg");
    background-position: center;
}

form {
    display: inline-block;
    background-color: rgba(255, 255, 255, 0.85);
    max-width: 500px;
    width: 100%;
    border-radius: 16px;
}

#loading-image {
    max-width: 100%;
}

.mdl-cell {
    text-align: center;
}

.mdl-card {
    z-index: inherit !important;
}

.user {
    background-color: rgba(255, 255, 255, 0.85) !important;
    width: 100% !important;
}

.avatar.mdl-card {
    background: url('') 100% / 100%;
    background-repeat: no-repeat;
    position: relative;
    margin-left: auto;
    margin-right: auto;
}

.avatar img {
    vertical-align: top;
    width: 100%;
    opacity: 0;
}

.avatar>.mdl-card__actions {
    position: absolute;
    bottom: 0px;
    height: 52px;
    padding: 16px;
    background: rgba(0, 0, 0, 0.4);
}

#avatar__username {
    color: #fff;
    font-size: 16px;
    font-weight: 500;
}

.reward {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
}

.reward img {
    width: 80px;
}

.reward h2 {
    font-size: inherit;
    line-height: inherit;
    font-weight: bold;
}

#types {
    background-color: rgba(255, 255, 255, 0.85);
    border-radius: 2px;
}

.type {
    width: 100% !important;
}

.type>.mdl-card__actions {
    height: 52px;
    padding: 16px;
    background: rgba(0, 0, 0, 0.2);
}

.type-card-image__filename {
    color: #fff;
    font-size: 14px;
    font-weight: 500;
}

.type__title {
    width: 100%;
    font-weight: bold;
}