* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html, body {
  width: 100%;
  height: 100%;
  min-height: 100dvh;
  overflow: hidden;
  background: radial-gradient(circle at top, #111 0%, #0a0815 55%, #000 100%);
  font-family: system-ui, sans-serif;
  color: #fff;
}
body {
  cursor: crosshair;
}
#ui {
  position: fixed;
  left: calc(env(safe-area-inset-left, 0px) + 12px);
  right: calc(env(safe-area-inset-right, 0px) + 12px);
  top: calc(env(safe-area-inset-top, 0px) + 12px);
  z-index: 20;
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-width: 520px;
  text-shadow: 0 0 8px rgba(0,0,0,0.8);
}
#message {
  margin-top: 12px;
  padding: 10px 14px;
  border-radius: 12px;
  background: rgba(0,0,0,0.55);
  font-size: 0.95rem;
}
#instructions {
  font-size: 0.9rem;
  color: #ccc;
}
#loadout-ui {
  margin-top: 6px;
  padding: 8px 10px;
  border-radius: 10px;
  background: rgba(0, 0, 0, 0.45);
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-width: 320px;
}
#weapon-main, #weapon-side {
  font-size: 0.88rem;
  color: #cfd5df;
}
#weapon-main.active, #weapon-side.active {
  color: #c8ffd8;
}
#gun-menu {
  position: fixed;
  right: calc(env(safe-area-inset-right, 0px) + 16px);
  top: calc(env(safe-area-inset-top, 0px) + 16px);
  z-index: 26;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 10px;
  background: rgba(0, 0, 0, 0.55);
  max-width: 320px;
}
#gun-menu label {
  font-size: 0.9rem;
  color: #d7d7d7;
}
#main-gun-select, #side-gun-select {
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 8px;
  background: rgba(16, 16, 16, 0.9);
  color: #fff;
  padding: 6px 10px;
  font-size: 0.9rem;
}
#active-weapon {
  width: 100%;
  font-size: 0.86rem;
  color: #c8ffd8;
}
#ammo {
  position: fixed;
  right: calc(env(safe-area-inset-right, 0px) + 16px);
  bottom: calc(env(safe-area-inset-bottom, 0px) + 16px);
  z-index: 25;
  padding: 8px 12px;
  border-radius: 10px;
  background: rgba(0, 0, 0, 0.5);
}
#crosshair {
  position: fixed;
  left: 50%;
  top: 50%;
  width: 16px;
  height: 16px;
  margin-left: -8px;
  margin-top: -8px;
  border: none;
  border-radius: 0;
  background:
    linear-gradient(
      to right,
      transparent 0 46%,
      rgba(255, 255, 255, 0.96) 46% 54%,
      transparent 54% 100%
    ),
    linear-gradient(
      to bottom,
      transparent 0 46%,
      rgba(255, 255, 255, 0.96) 46% 54%,
      transparent 54% 100%
    );
  z-index: 30;
  pointer-events: none;
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.45);
  transition: width 80ms linear, height 80ms linear, margin 80ms linear;
}
#crosshair.iron-cross {
  border: none;
  border-radius: 0;
  background:
    linear-gradient(
      to right,
      transparent 0 45%,
      rgba(210, 255, 230, 0.98) 45% 55%,
      transparent 55% 100%
    ),
    linear-gradient(
      to bottom,
      transparent 0 45%,
      rgba(210, 255, 230, 0.98) 45% 55%,
      transparent 55% 100%
    );
  box-shadow: 0 0 10px rgba(160, 255, 210, 0.5);
}
#scope-overlay {
  position: fixed;
  inset: 0;
  z-index: 29;
  pointer-events: none;
  opacity: 0;
  transition: opacity 120ms ease;
  background:
    radial-gradient(circle at center, transparent 0 21%, rgba(0, 0, 0, 0.78) 21.2% 100%);
}
#scope-overlay.active {
  opacity: 1;
}
#iron-sight-overlay {
  position: fixed;
  inset: 0;
  z-index: 29;
  pointer-events: none;
  opacity: 0;
  transition: opacity 100ms ease;
}
#iron-sight-overlay.active {
  opacity: 1;
}
.iron-rear-left-wall,
.iron-rear-right-wall,
.iron-rear-bottom-bar,
.iron-front-post {
  position: absolute;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 0 12px rgba(255, 255, 255, 0.35);
}
.iron-rear-left-wall {
  left: calc(50% - 44px);
  top: calc(50% + 2px);
  width: 6px;
  height: 24px;
  border-radius: 3px;
}
.iron-rear-right-wall {
  left: calc(50% + 38px);
  top: calc(50% + 2px);
  width: 6px;
  height: 24px;
  border-radius: 3px;
}
.iron-rear-bottom-bar {
  left: calc(50% - 44px);
  top: calc(50% + 20px);
  width: 88px;
  height: 6px;
  border-radius: 3px;
}
.iron-front-post {
  left: 50%;
  top: calc(50% - 34px);
  width: 8px;
  height: 38px;
  margin-left: -4px;
  border-radius: 3px;
}
#current-weapon-bottom {
  position: fixed;
  left: 50%;
  bottom: calc(env(safe-area-inset-bottom, 0px) + 14px);
  transform: translateX(-50%);
  z-index: 27;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.58);
  color: #c8ffd8;
  font-size: 0.9rem;
  letter-spacing: 0.2px;
  pointer-events: none;
}
.scope-line {
  position: absolute;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 0 8px rgba(255, 255, 255, 0.45);
}
.scope-line-h {
  left: 50%;
  top: 50%;
  width: 120px;
  height: 2px;
  margin-left: -60px;
  margin-top: -1px;
}
.scope-line-v {
  left: 50%;
  top: 50%;
  width: 2px;
  height: 120px;
  margin-left: -1px;
  margin-top: -60px;
}
canvas {
  display: block;
  position: fixed;
  inset: 0;
  z-index: 0;
}