:root {
  --navy: #1a3c78;
  --gold: #c5811a;
  --crm: #5c4a32;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  background: #fff;
  font-family: "Segoe UI", Arial, sans-serif;
}

main {
  min-height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: clamp(0.5rem, 2vh, 1.25rem);
  padding: 1.25rem 1rem 1.75rem;
}

img {
  display: block;
  width: min(920px, 100%);
  height: auto;
}

nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
  width: min(40rem, 100%);
}

a {
  flex: 1 1 9.5rem;
  min-height: 3.25rem;
  display: grid;
  place-items: center;
  padding: 0.85rem 1.2rem;
  border-radius: 999px;
  text-align: center;
  text-decoration: none;
  color: #fff;
  font-weight: 700;
  letter-spacing: 0.08em;
  font-size: 1.05rem;
}

.erp {
  background: var(--navy);
}

.disp {
  background: var(--gold);
}

.crm {
  background: var(--crm);
}

a:hover {
  filter: brightness(1.08);
}

a:focus-visible {
  outline: 3px solid var(--navy);
  outline-offset: 3px;
}

@media (max-width: 640px) {
  nav {
    flex-direction: column;
  }

  a {
    width: 100%;
  }
}