*{box-sizing:border-box}
html,body{margin:0;width:100%;height:100%;overflow:hidden;background:#000;font-family:Arial,Helvetica,sans-serif}
#app{width:100vw;height:100vh;display:flex;align-items:center;justify-content:center;background:#000}
#screen{position:relative;width:100vw;height:100vh;overflow:hidden}
.page-image{position:absolute;inset:0;width:100%;height:100%;object-fit:fill;display:block;user-select:none;-webkit-user-drag:none}
.hotspot{position:absolute;display:block;background:transparent;border:0;padding:0;margin:0;cursor:pointer;z-index:5;-webkit-tap-highlight-color:transparent}
.hotspot:focus{outline:none}
.hotspot:focus-visible{outline:2px solid rgba(255,255,255,.8);outline-offset:3px}

/* Tab 1 has no navigation artwork in the supplied JPG, so its single
   Home control is rendered here. */
.tab1-home{
  left:4.1%; bottom:3.8%;
  transform:none;
  width:6.2%; height:10.8%;
  border-radius:9px;
  background:linear-gradient(#ffffff,#f4f4f4);
  border:2px solid rgba(210,210,210,.95);
  box-shadow:0 3px 7px rgba(0,0,0,.28);
  color:#111;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:2px;
  font-weight:700;
  font-size:clamp(10px,.95vw,18px);
  letter-spacing:.01em;
}
.home-icon{
  display:block;
  width:100%;
  height:100%;
  background:url("assets/home-tab1.png") center center / contain no-repeat;
}

.placeholder{
  width:100%;height:100%;display:flex;align-items:center;justify-content:center;
  color:#173b73;background:#fff;font-size:clamp(20px,3vw,48px);font-weight:700;
  text-align:center;padding:5vw;
}
.placeholder small{display:block;margin-top:1em;font-size:.45em;font-weight:400}