* {
  margin: 0;
  padding: 0;
}

html,
body {
  height: 100%;
}

body {
  background: #000 url("/image.jpg") center / cover no-repeat fixed;
}

nav {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 8vh;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1.25rem;
  padding: 0 1rem;
}

a {
  min-width: 9.5rem;
  padding: 0.9rem 1.6rem;
  border-radius: 4px;
  text-align: center;
  text-decoration: none;
  color: #fff;
  font-family: "Segoe UI", Arial, sans-serif;
  font-weight: 700;
  letter-spacing: 0.08em;
  font-size: 1.05rem;
}

.erp {
  background: #1a3c78;
}

.disp {
  background: #c5811a;
}

.crm {
  background: #5c4a32;
}

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