.loader {
    border: 5px solid #ccc;
    border-top: 5px solid #007cba;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    animation: spin 2s linear infinite;
}
.loader-big {
    border: 10px solid #ccc;
    border-top: 10px solid #007cba;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 2s linear infinite;
}
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.field-email-subject,
.field-email-content {
    min-width: 650px;
}
.field-email-content {
    min-height: 650px;
}