* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: black;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Main container */
.stage {
  position: relative;
  width: 85vmin;
  height: 85vmin;
}

/* Centre logo */
.center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.logo {
  max-width: 240px;
  height: auto;
  pointer-events: none;
}

/* Image link container */
.nav-img {
  position: absolute;
  width: 130px;
  height: 130px;
  border-radius: 50%;
  overflow: hidden;
  cursor: pointer;
}

/* Stack both images */
.nav-img img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Default + hover states (instant swap) */
.nav-img .img-hover {
  opacity: 0;
}

.nav-img:hover .img-hover {
  opacity: 1;
}

.nav-img:hover .img-default {
  opacity: 0;
}

/* Positions */
.pos-top {
  top: 2%;
  left: 50%;
  transform: translateX(-50%);
}

.pos-top-right {
  top: 10%;
  right: 2%;
}

.pos-bottom-right {
  bottom: 10%;
  right: 2%;
}

.pos-bottom-left {
  bottom: 10%;
  left: 2%;
}

.pos-top-left {
  top: 10%;
  left: 2%;
}

/* Mobile */
@media (max-width: 600px) {
  .logo {
    max-width: 180px;
  }

  .nav-img {
    width: 100px;
    height: 100px;
  }
}