/* Museum game — full-bleed page. Popup surfaces follow the site theme via
   html[data-theme], set from localStorage 'edu-theme' in index.html. */

:root {
  --popup-bg: #ffffff;
  --popup-fg: #1c1c1e;
  --popup-muted: #5a5a60;
  --popup-border: #d8d4cc;
  --accent: #c4944a;
}
html[data-theme="dark"] {
  --popup-bg: #1e1e22;
  --popup-fg: #ececee;
  --popup-muted: #a8a8b0;
  --popup-border: #3a3a42;
}

* { box-sizing: border-box; }

/* the hidden attribute must beat the display rules below */
[hidden] { display: none !important; }

html, body {
  margin: 0;
  padding: 0;
  background: #141414;
  overscroll-behavior: none;
}
body {
  position: fixed;      /* stop iOS rubber-banding entirely */
  inset: 0;
  overflow: hidden;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
}

#game, #game canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100dvh;
  touch-action: none;
  outline: none;
}

#loading {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  color: #cfcfcf;
  font-size: 1.1rem;
  pointer-events: none;
}

#back-link {
  position: fixed;
  top: max(10px, env(safe-area-inset-top));
  left: max(10px, env(safe-area-inset-left));
  z-index: 30;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.55);
  color: #eee;
  text-decoration: none;
  font-size: 0.85rem;
}
#back-link:hover { background: rgba(0, 0, 0, 0.8); }

/* ---- proximity prompt ---- */
#prompt {
  position: fixed;
  left: 50%;
  bottom: calc(24px + env(safe-area-inset-bottom));
  transform: translateX(-50%);
  z-index: 20;
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 10px 18px;
  border-radius: 12px;
  background: rgba(10, 10, 12, 0.82);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.18);
  white-space: nowrap;
  pointer-events: none;
}
#prompt-title { font-weight: 700; }
.prompt-keys { font-size: 0.85rem; color: #cfcfcf; }
.prompt-keys .dot { opacity: 0.5; }
kbd {
  display: inline-block;
  padding: 1px 7px;
  border-radius: 5px;
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-bottom-width: 2px;
  font: 700 0.8em ui-monospace, monospace;
  background: rgba(255, 255, 255, 0.12);
}
/* touch mode: hide key hints and keep the prompt clear of the d-pad */
body.touch-mode .prompt-keys { display: none; }
body.touch-mode #prompt {
  bottom: auto;
  top: calc(14px + env(safe-area-inset-top));
}

#toast {
  position: fixed;
  left: 50%;
  bottom: calc(80px + env(safe-area-inset-bottom));
  transform: translateX(-50%);
  z-index: 25;
  padding: 10px 16px;
  border-radius: 10px;
  background: rgba(10, 10, 12, 0.88);
  color: #ffd98a;
  border: 1px solid rgba(255, 217, 138, 0.35);
  font-size: 0.9rem;
  pointer-events: none;
  max-width: 90vw;
  text-align: center;
}

/* ---- touch controls ---- */
#touch { display: none; }
#touch.visible { display: block; }

#dpad {
  position: fixed;
  left: calc(18px + env(safe-area-inset-left));
  bottom: calc(18px + env(safe-area-inset-bottom));
  z-index: 20;
  display: grid;
  grid-template-columns: repeat(3, 52px);
  grid-template-rows: repeat(3, 52px);
  gap: 4px;
}
#dpad button[data-dir="up"]    { grid-area: 1 / 2; }
#dpad button[data-dir="left"]  { grid-area: 2 / 1; }
#dpad button[data-dir="right"] { grid-area: 2 / 3; }
#dpad button[data-dir="down"]  { grid-area: 3 / 2; }

#actions {
  position: fixed;
  right: calc(18px + env(safe-area-inset-right));
  bottom: calc(26px + env(safe-area-inset-bottom));
  z-index: 20;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

#dpad button, #actions button {
  touch-action: none;
  border: 2px solid rgba(255, 255, 255, 0.35);
  border-radius: 14px;
  background: rgba(20, 20, 24, 0.6);
  color: #fff;
  font-size: 1.15rem;
  font-weight: 700;
  padding: 0;
}
#actions button {
  width: 62px;
  height: 62px;
  border-radius: 50%;
  font-size: 1.4rem;
}
#dpad button.held, #actions button:active { background: rgba(255, 255, 255, 0.28); }
#actions button.in-range {
  border-color: #ffd98a;
  color: #ffd98a;
  box-shadow: 0 0 14px rgba(255, 217, 138, 0.45);
}

/* ---- exhibit popup ---- */
#popup-backdrop {
  position: fixed;
  inset: 0;
  z-index: 40;
  background: rgba(0, 0, 0, 0.6);
  display: grid;
  place-items: center;
  padding: max(2.5vh, env(safe-area-inset-top)) 2.5vw;
}
#popup {
  width: min(720px, 100%);
  max-height: 100%;
  display: flex;
  flex-direction: column;
  border-radius: 16px;
  background: var(--popup-bg);
  color: var(--popup-fg);
  border: 1px solid var(--popup-border);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
  overflow: hidden;
}
#popup header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding: 18px 20px 12px;
  border-bottom: 1px solid var(--popup-border);
}
#popup h2 { margin: 6px 0 0; font-size: 1.35rem; }
#popup-zone {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
#popup-close {
  flex: none;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid var(--popup-border);
  background: transparent;
  color: var(--popup-fg);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
}
#popup-close:hover { background: rgba(128, 128, 128, 0.15); }
#popup-body {
  padding: 16px 20px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  -webkit-user-select: text;
  user-select: text;
  line-height: 1.55;
}
#popup-body p { margin: 0.6em 0; }
#popup-body figure { margin: 0 0 14px; }
#popup-body img {
  display: block;
  max-width: 100%;
  border-radius: 10px;
  image-rendering: pixelated;
}
#popup-body figcaption {
  margin-top: 6px;
  font-size: 0.82rem;
  color: var(--popup-muted);
}
#popup-body .gallery {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  padding-bottom: 8px;
  margin-bottom: 10px;
}
#popup-body .gallery figure { flex: 0 0 min(300px, 75%); }
#popup footer {
  padding: 12px 20px 16px;
  border-top: 1px solid var(--popup-border);
}
#popup-audio {
  padding: 10px 16px;
  border-radius: 10px;
  border: 1px solid var(--popup-border);
  background: transparent;
  color: var(--popup-fg);
  font-size: 0.95rem;
  cursor: pointer;
}
#popup-audio:hover { border-color: var(--accent); color: var(--accent); }
#popup kbd { border-color: var(--popup-muted); background: rgba(128, 128, 128, 0.12); }