:root{
  --bg: #F7F5F2;
  --ink: rgba(34, 33, 32, 0.74);
  --muted: rgba(34, 33, 32, 0.52);
  --shadow: rgba(0,0,0,0.06);
}
html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  overflow: hidden;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  color: var(--ink);
}
#rings{
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  touch-action: none;
}
/* Upper-left microcopy */
.topline{
  position: fixed;
  top: 16px;
  left: 16px;
  display: flex;
  flex-direction: column;
  gap: 3px;
  z-index: 20;
  user-select: none;
  -webkit-user-select: none;
}
.topline__tag{
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--muted);
}
.topline__email{
  font-size: 12px;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid rgba(34,33,32,0.18);
  width: fit-content;
}
.topline__email:hover{ border-bottom-color: rgba(34,33,32,0.35); }
/* Center logo */
.centerlogo{
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  z-index: 10;
  pointer-events: none;
}
.centerlogo__img{
  width: min(340px, 72vw);
  height: auto;
  opacity: 0.26;
  filter: drop-shadow(0px 2px 14px var(--shadow));
}
/* Hint */
.hint{
  position: fixed;
  left: 50%;
  bottom: 16px;
  transform: translateX(-50%);
  font-size: 16px;
  color: rgba(34,33,32,0.44);
  letter-spacing: 0.02em;
  z-index: 30;
  user-select: none;
  -webkit-user-select: none;
  pointer-events: none;
  opacity: 0;
  transition: opacity 500ms ease;
  text-align: center;
  padding: 6px 10px;
}
.hint.show{ opacity: 1; }

@media (max-width: 420px){
  .topline{ top: 12px; left: 12px; }
  .centerlogo__img{ width: min(220px, 66vw); }
}