:root {
  color-scheme: dark;
  --bg: #02040a;
  --panel: rgba(10, 18, 34, 0.92);
  --panel-strong: rgba(13, 25, 49, 0.96);
  --text: #f3f7ff;
  --muted: #a9b8d7;
  --accent: #7dd3fc;
  --accent-2: #34d399;
  --danger: #fb7185;
  --warning: #fbbf24;
  --border: rgba(125, 211, 252, 0.35);
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; background: var(--bg); color: var(--text); }
body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  overflow: hidden;
  overscroll-behavior: none;
  touch-action: none;
  user-select: none;
}
button {
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(125, 211, 252, 0.14);
  color: var(--text);
  min-height: 48px;
  padding: 0 18px;
  font: inherit;
  font-weight: 800;
  letter-spacing: 0.02em;
}
button:active { transform: scale(0.98); }
button:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }

.intro-screen,
.game-screen {
  position: fixed;
  inset: 0;
  min-height: 100dvh;
  width: 100vw;
}

.intro-screen {
  display: grid;
  place-items: center;
  padding: max(18px, env(safe-area-inset-top)) max(18px, env(safe-area-inset-right)) max(18px, env(safe-area-inset-bottom)) max(18px, env(safe-area-inset-left));
  background:
    radial-gradient(circle at 20% 10%, rgba(125, 211, 252, 0.24), transparent 32%),
    radial-gradient(circle at 80% 90%, rgba(52, 211, 153, 0.16), transparent 32%),
    #02040a;
}
.intro-card {
  width: min(780px, 100%);
  border: 1px solid var(--border);
  border-radius: 28px;
  padding: clamp(22px, 5vw, 46px);
  background: var(--panel);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.5);
}
.badge {
  display: inline-flex;
  margin: 0 0 14px;
  padding: 8px 12px;
  border: 1px solid rgba(52, 211, 153, 0.45);
  border-radius: 999px;
  color: var(--accent-2);
  background: rgba(52, 211, 153, 0.1);
  font-size: 0.8rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}
h1 { margin: 0 0 16px; font-size: clamp(2.4rem, 9vw, 5.2rem); line-height: 0.94; }
p { font-size: clamp(1rem, 2.7vw, 1.35rem); line-height: 1.55; color: var(--muted); }
.small { font-size: clamp(0.88rem, 2.2vw, 1.05rem); }
#startNowBtn { width: 100%; margin-top: 18px; background: rgba(52, 211, 153, 0.2); border-color: rgba(52, 211, 153, 0.7); }

.game-screen {
  display: grid;
  place-items: center;
  background: #000;
}
#mazeCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  background: #050915;
}
.blind-mode #mazeCanvas { opacity: 0.02; filter: blur(18px); }
.show-visual #mazeCanvas { opacity: 1; filter: none; }
.blind-veil {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at 50% 45%, rgba(125, 211, 252, 0.07), transparent 24%),
    linear-gradient(135deg, rgba(125, 211, 252, 0.08), rgba(0, 0, 0, 0.04) 34%, rgba(52, 211, 153, 0.05)),
    #000;
}
.show-visual .blind-veil { display: none; }

.scan-pointer {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 74px;
  height: 74px;
  margin-left: -37px;
  margin-top: -37px;
  border: 2px solid rgba(125, 211, 252, 0.82);
  border-radius: 50%;
  pointer-events: none;
  opacity: 0;
  transform: scale(0.78);
  transition: opacity 140ms ease, transform 140ms ease;
  box-shadow: 0 0 28px rgba(125, 211, 252, 0.24), inset 0 0 22px rgba(125, 211, 252, 0.12);
  z-index: 4;
}
.scan-pointer.active { opacity: 1; transform: scale(1); }
.scan-pointer span,
.scan-pointer::before,
.scan-pointer::after {
  content: "";
  position: absolute;
  background: rgba(125, 211, 252, 0.78);
}
.scan-pointer span {
  width: 10px;
  height: 10px;
  left: 50%;
  top: 50%;
  margin-left: -5px;
  margin-top: -5px;
  border-radius: 50%;
}
.scan-pointer::before {
  left: 50%;
  top: 8px;
  bottom: 8px;
  width: 2px;
  margin-left: -1px;
}
.scan-pointer::after {
  top: 50%;
  left: 8px;
  right: 8px;
  height: 2px;
  margin-top: -1px;
}
.scanning-now .blind-symbol {
  border-color: rgba(52, 211, 153, 0.44);
  box-shadow: 0 0 90px rgba(52, 211, 153, 0.16);
}
.blind-symbol {
  width: 122px;
  height: 122px;
  display: grid;
  place-items: center;
  border: 2px solid rgba(125, 211, 252, 0.28);
  border-radius: 50%;
  color: rgba(125, 211, 252, 0.72);
  font-size: 2.8rem;
  box-shadow: 0 0 80px rgba(125, 211, 252, 0.12);
}
.blind-label {
  position: absolute;
  bottom: max(86px, env(safe-area-inset-bottom));
  color: rgba(243, 247, 255, 0.35);
  font-size: 0.82rem;
  font-weight: 900;
  letter-spacing: 0.22em;
}
.hud {
  position: absolute;
  top: max(12px, env(safe-area-inset-top));
  left: max(12px, env(safe-area-inset-left));
  right: max(12px, env(safe-area-inset-right));
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  pointer-events: none;
  color: rgba(243, 247, 255, 0.78);
  font-size: 0.82rem;
}
.hud strong,
.hud span,
#miniStatus {
  display: block;
  max-width: min(52vw, 520px);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
#modeLabel { color: rgba(125, 211, 252, 0.72); }
.controls {
  position: absolute;
  left: max(12px, env(safe-area-inset-left));
  right: max(12px, env(safe-area-inset-right));
  bottom: max(12px, env(safe-area-inset-bottom));
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}
.controls button {
  min-width: 0;
  min-height: 54px;
  padding: 0 8px;
  background: rgba(10, 18, 34, 0.72);
  backdrop-filter: blur(12px);
}
.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}
@media (max-width: 520px) {
  .controls button { font-size: 0.86rem; }
  .hud { font-size: 0.76rem; }
}