.user-avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-weight: 600;
    color: white;
    text-transform: uppercase;
    flex-shrink: 0;
    user-select: none;
    vertical-align: middle;
}

.user-avatar.small {
    width: 24px;
    height: 24px;
    font-size: 10px;
}

.user-avatar.medium {
    width: 32px;
    height: 32px;
    font-size: 12px;
}

.user-avatar.large {
    width: 40px;
    height: 40px;
    font-size: 14px;
}

.user-avatar.primary {
    border: 2px solid rgba(255, 255, 255, 0.8);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.user-avatar.secondary {
    border: 2px solid rgba(255, 255, 255, 0.5);
}

.user-avatar-initials {
    line-height: 1;
}