css/interface.css

.sf-svg {
    width: 0.8rem;
    height: 0.8rem;
    display: inline;
    margin-left: 0.1rem;
    transform: rotate(-45deg);
}

.sf-svg path,
.sf-svg {
    color: inherit;
}

.sf-button {
    background: black;
    border: 1px solid #f9f9f9;
    border-radius: 6px;
    padding: 0 .5rem;
    cursor: pointer;
    color: white;
    font-weight: bold;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    margin: 0.5rem 0;
    transition: background 0.3s, color 0.3s;
    margin: 5px;
}

.sf-button:hover {
    background: #1a73e8;
    color: #f9f9f9;
}

.sf-button:active {
    background: #f9f9f9;
    color: #1a73e8;
}

hr {
    margin: 1rem 0;
}