:root {
  --hud-bg: rgba(8, 10, 16, 0.62);
  --hud-border: rgba(232, 214, 168, 0.28);
  --hud-text: #f4ead4;
  --hud-muted: #c7b792;
  --hud-shadow: 0 8px 28px rgba(0, 0, 0, 0.35);
}

@media (prefers-color-scheme: light) {
  :root {
    --hud-bg: rgba(255, 248, 236, 0.72);
    --hud-border: rgba(62, 44, 24, 0.22);
    --hud-text: #2a2118;
    --hud-muted: #5c4a34;
    --hud-shadow: 0 8px 24px rgba(40, 28, 12, 0.16);
  }
}

html,
body {
  margin: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #07080d;
  color: var(--hud-text);
  font-family: "Iowan Old Style", "Palatino Linotype", Palatino, "Times New Roman", serif;
}

@media (prefers-color-scheme: light) {
  html,
  body {
    background: #1b2230;
  }
}

canvas {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
}

#hud-top-right,
#controls-hint,
#pause-overlay .pause-text {
  position: absolute;
  z-index: 2;
  pointer-events: none;
  user-select: none;
}

#hud-top-right {
  top: 18px;
  right: 18px;
  min-width: 168px;
  padding: 12px 14px 13px;
  border: 1px solid var(--hud-border);
  border-radius: 10px;
  background: var(--hud-bg);
  box-shadow: var(--hud-shadow);
  backdrop-filter: blur(8px);
  letter-spacing: 0.02em;
}

#hud-top-right div {
  line-height: 1.45;
  font-size: 13px;
}

#route-name {
  font-size: 15px;
  font-weight: 600;
}

#fps,
#speed,
#camera-mode {
  font-family: "Avenir Next", "Segoe UI", sans-serif;
  color: var(--hud-muted);
  font-size: 12px;
}

#controls-hint {
  left: 18px;
  bottom: 18px;
  max-width: min(520px, calc(100vw - 36px));
  padding: 9px 12px;
  border: 1px solid var(--hud-border);
  border-radius: 8px;
  background: var(--hud-bg);
  box-shadow: var(--hud-shadow);
  color: var(--hud-muted);
  font-family: "Avenir Next", "Segoe UI", sans-serif;
  font-size: 12px;
  line-height: 1.4;
  opacity: 1;
  transition: opacity 1.6s ease;
}

#controls-hint.is-hidden {
  opacity: 0;
}

#pause-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.25s ease;
  background: rgba(4, 6, 10, 0.18);
}

#pause-overlay.is-visible {
  opacity: 1;
}

#pause-overlay .pause-text {
  position: static;
  padding: 10px 22px;
  border: 1px solid var(--hud-border);
  border-radius: 999px;
  background: var(--hud-bg);
  box-shadow: var(--hud-shadow);
  font-size: 18px;
  letter-spacing: 0.28em;
  text-indent: 0.28em;
}

@media (prefers-reduced-motion: reduce) {
  #controls-hint,
  #pause-overlay {
    transition: none;
  }
}