main-site/components/styles/navbar.tsx

import styled from 'styled-components'
import Link from 'next/link';

interface ActivePropType {
  active?: number;
}

export const NavWrap = styled.div`
  display: flex;
  flex-wrap: nowrap;
  justify-content: center;
  align-items: center;
  border-bottom: 1px solid ${({ theme }) => theme.colors.primary};
`

export const NavBar = styled.nav`
  margin-right: 1%;
  display: flex;
  flex: 1;
  padding: 1rem 0;
  flex-wrap: nowrap;
  justify-content: center;
  align-items: center;
`

export const NavLink = styled(Link) <ActivePropType>`
  color: ${props => props.active ?
    ({ theme }) => theme.invertButtons ?
      theme.colors.text ? theme.colors.text : theme.colors.secondary : theme.colors.secondary :
    ({ theme }) => theme.colors.primary};
  
  background-color: ${props => props.active ?
    ({ theme }) => theme.invertButtons ?
      theme.colors.secondary : theme.colors.background :
    ({ theme }) => theme.colors.background};

  padding: 2px 6px;
  border: 2px solid;

  margin: 0.2rem;
  border-radius: 5px;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: all 0.1s ease;

  &:hover {
    color: ${({ theme }) => theme.invertButtons ?
    theme.colors.text ? theme.colors.text : theme.colors.primary :
    theme.colors.secondary};

    background-color: ${({ theme }) => theme.invertButtons ?
    theme.colors.secondary :
    theme.colors.background};
  }
`