body { background-color: #f5f7fa; }
h1 { font-size: 2rem; margin-top: 1rem; }
.section { margin-bottom: 1.5rem; }
#expires_container { margin-top: 1rem; display: none; }
@keyframes copy-flash {
    from { background-color: #c8e6c9; }
    to { background-color: inherit; }
}
.copy-anim {
    animation: copy-flash 0.5s;
}

code.link {
    display: block;
    background-color: #f0f0f0;
    padding: 0.5rem;
    border-radius: 4px;
    margin-bottom: 0.5rem;
    cursor: pointer;
}