/* Top view: full-viewport canvas with quiet glass controls. */
:root {
  --ink: #173024;
  --glass: rgba(250, 252, 244, 0.74);
  --glass-line: rgba(255, 255, 255, 0.6);
}

* { box-sizing: border-box; }

html,
body {
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: #6e8c4f;
  color: var(--ink);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
}

main { position: fixed; inset: 0; }

#top-scene {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
  cursor: grab;
}

#top-scene:active { cursor: grabbing; }

.back,
.hint,
.zoom {
  position: fixed;
  background: var(--glass);
  border: 1px solid var(--glass-line);
  border-radius: 999px;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.back {
  top: 14px;
  left: 14px;
  margin: 0;
  padding: 6px 14px;
  font-size: 14px;
}

.back a { color: var(--ink); text-decoration: none; }
.back a:focus-visible,
.zoom button:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }

.hint {
  left: 14px;
  bottom: 14px;
  margin: 0;
  padding: 6px 14px;
  font-size: 13px;
  max-width: calc(100% - 180px);
}

.zoom {
  right: 14px;
  bottom: 14px;
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 4px;
}

.zoom button {
  width: 40px;
  height: 40px;
  border: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.75);
  color: var(--ink);
  font-size: 22px;
  cursor: pointer;
}

#zoom-level {
  min-width: 52px;
  text-align: center;
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}

@media (max-width: 520px) {
  .hint { display: none; }
}