:root {
  --hud: #7cf7ff;
  --hud-dim: rgba(124, 247, 255, 0.45);
  --text: #d8faff;
  --danger: #ff5d72;
  --gold: #ffd34d;
  --violet: #b388ff;
}
* { box-sizing: border-box; }
html, body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: #020611;
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  touch-action: none;
  user-select: none;
}
#gl, #overlay {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  display: block;
  touch-action: none;
}
#gl { z-index: 0; }
#overlay { z-index: 10; pointer-events: none; }
#introOverlay {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: max(18px, env(safe-area-inset-top)) max(14px, env(safe-area-inset-right)) max(18px, env(safe-area-inset-bottom)) max(14px, env(safe-area-inset-left));
  background:
    radial-gradient(circle at 52% 38%, rgba(255, 211, 77, 0.10), transparent 22%),
    radial-gradient(circle at 44% 58%, rgba(179, 136, 255, 0.12), transparent 28%),
    rgba(0, 0, 0, 0.48);
  z-index: 30;
  transition: opacity 900ms ease, visibility 900ms ease;
}
#introOverlay.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}
.introPanel {
  width: min(92vw, 760px);
  max-height: calc(100dvh - 36px);
  overflow: auto;
  padding: 34px 32px 28px;
  border-radius: 8px;
  background: linear-gradient(180deg, rgba(18, 28, 60, 0.80), rgba(7, 14, 28, 0.88));
  border: 1px solid rgba(124, 247, 255, 0.26);
  box-shadow: 0 0 0 1px rgba(255, 211, 77, 0.07) inset, 0 0 40px rgba(0, 90, 255, 0.18), 0 18px 80px rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(8px);
  animation: introFloat 5s ease-in-out infinite;
}
@keyframes introFloat {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-7px); }
}
.brand {
  font-size: clamp(2rem, 5vw, 4rem);
  margin: 0 0 10px 0;
  letter-spacing: 0.08em;
  color: var(--hud);
  text-transform: uppercase;
  text-shadow: 0 0 16px rgba(124, 247, 255, 0.35);
}
.subtitle {
  margin: 0 0 14px 0;
  color: var(--gold);
  font-size: clamp(1rem, 2vw, 1.2rem);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.blurb {
  margin: 0 0 20px 0;
  line-height: 1.55;
  color: #d8edf9;
  max-width: 62ch;
  font-size: 0.98rem;
}
.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 18px;
}
button {
  appearance: none;
  border: 1px solid rgba(124, 247, 255, 0.4);
  background: linear-gradient(180deg, rgba(22, 40, 77, 0.95), rgba(7, 20, 35, 0.95));
  color: var(--hud);
  padding: 12px 18px;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: transform 120ms ease, box-shadow 180ms ease, background 180ms ease;
  box-shadow: 0 0 20px rgba(124, 247, 255, 0.12);
  pointer-events: auto;
}
button:disabled {
  cursor: default;
  opacity: 0.46;
  transform: none;
  box-shadow: none;
}
button:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 24px rgba(124, 247, 255, 0.22);
  background: linear-gradient(180deg, rgba(26, 52, 98, 0.98), rgba(10, 26, 46, 0.98));
}
.tiny { font-size: 0.84rem; color: #b2dff0; opacity: 0.92; }
.controlKey {
  display: grid;
  gap: 7px;
  margin: 0 0 12px 0;
  color: #c4ebff;
  font-size: 0.82rem;
}
.controlKey div {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 28px;
  padding: 6px 9px;
  border-radius: 8px;
  background: rgba(255,255,255,0.035);
  border: 1px solid rgba(124, 247, 255, 0.10);
}
.controlKey span {
  flex: 0 0 76px;
  color: var(--gold);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: 0.72rem;
}
.controlKey b {
  color: var(--hud);
  font-weight: 700;
}
.modeNotice {
  margin: 0 0 16px 0;
  padding: 10px 12px;
  border-radius: 8px;
  background: rgba(255, 211, 77, 0.10);
  border: 1px solid rgba(255, 211, 77, 0.28);
  color: #ffe7a3;
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
#hud {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 20;
}
#topBar {
  position: absolute;
  top: max(16px, env(safe-area-inset-top));
  left: max(18px, env(safe-area-inset-left));
  right: max(18px, env(safe-area-inset-right));
  min-height: 42px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 8px 14px;
  border: 1px solid rgba(124, 247, 255, 0.22);
  border-radius: 8px;
  background: linear-gradient(180deg, rgba(10, 18, 36, 0.72), rgba(4, 9, 20, 0.58));
  box-shadow: 0 0 30px rgba(0, 180, 255, 0.07);
  backdrop-filter: blur(4px);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--hud);
  font-weight: 700;
  font-size: 0.92rem;
}
#topBar .topLeft, #topBar .topRight {
  display: flex;
  gap: 18px;
  align-items: center;
  white-space: nowrap;
}
#leftPanel, #rightPanel {
  position: absolute;
  top: 78px;
  width: 220px;
  padding: 12px 14px;
  border: 1px solid rgba(124, 247, 255, 0.16);
  border-radius: 8px;
  background: linear-gradient(180deg, rgba(9, 17, 31, 0.64), rgba(4, 8, 18, 0.52));
  box-shadow: 0 0 30px rgba(0, 180, 255, 0.06);
  backdrop-filter: blur(4px);
  font-family: "Courier New", monospace;
  font-size: 0.92rem;
}
#leftPanel { left: 18px; }
#rightPanel { right: 18px; }
.hudRow {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 6px 0;
  border-bottom: 1px solid rgba(124, 247, 255, 0.08);
}
.hudRow:last-child { border-bottom: none; }
.label { color: var(--hud-dim); }
.value { color: var(--hud); font-weight: 700; }
#scopeWrap {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid rgba(124, 247, 255, 0.10);
  display: flex;
  justify-content: center;
}
#scopeCanvas {
  width: 180px;
  height: 180px;
  border-radius: 8px;
  border: 1px solid rgba(124, 247, 255, 0.18);
  background: linear-gradient(180deg, rgba(12,22,12,0.9), rgba(8,14,8,0.9));
  box-shadow: inset 0 0 16px rgba(0,0,0,0.45), 0 0 18px rgba(124,247,255,0.08);
  image-rendering: crisp-edges;
}
#reticle {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 92px;
  height: 92px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  border: 1px solid rgba(124, 247, 255, 0.35);
  box-shadow: 0 0 18px rgba(124, 247, 255, 0.10), 0 0 0 1px rgba(124, 247, 255, 0.05) inset;
}
#reticle::before, #reticle::after {
  content: "";
  position: absolute;
  background: rgba(124, 247, 255, 0.55);
}
#reticle::before { left: 50%; top: 14px; bottom: 14px; width: 1px; transform: translateX(-50%); }
#reticle::after { top: 50%; left: 14px; right: 14px; height: 1px; transform: translateY(-50%); }
#reticleDot {
  position: absolute;
  left: 50%; top: 50%; width: 8px; height: 8px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: var(--hud);
  box-shadow: 0 0 12px rgba(124, 247, 255, 0.8);
}
#bottomBar {
  position: absolute;
  left: 50%;
  bottom: max(18px, env(safe-area-inset-bottom));
  transform: translateX(-50%);
  width: min(780px, calc(100vw - 40px));
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid rgba(124, 247, 255, 0.18);
  background: linear-gradient(180deg, rgba(8, 16, 30, 0.62), rgba(3, 7, 15, 0.48));
  font-family: "Courier New", monospace;
  color: rgba(124, 247, 255, 0.85);
  letter-spacing: 0.08em;
  font-size: 0.84rem;
  backdrop-filter: blur(4px);
}
#centerMessage {
  position: absolute;
  left: 50%;
  top: calc(50% - 105px);
  transform: translateX(-50%);
  padding: 10px 14px;
  border-radius: 8px;
  font-family: "Courier New", monospace;
  font-size: 0.98rem;
  color: var(--hud);
  letter-spacing: 0.10em;
  text-transform: uppercase;
  background: rgba(8, 18, 36, 0.45);
  border: 1px solid rgba(124, 247, 255, 0.18);
  opacity: 0;
  transition: opacity 180ms ease;
  white-space: nowrap;
}
#centerMessage.show { opacity: 1; }
#flash {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 25;
  opacity: 0;
  background: radial-gradient(circle at 50% 50%, rgba(255,255,255,0.12), transparent 40%);
  transition: opacity 160ms ease;
}
#flash.show { opacity: 1; }
.legend {
  margin-top: 12px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 10px;
  font-size: 0.88rem;
  color: #c4ebff;
}
.legend div {
  padding: 8px 10px;
  border-radius: 8px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(124, 247, 255, 0.10);
}
.swatch {
  display: inline-block;
  width: 10px;
  height: 10px;
  margin-right: 8px;
  border-radius: 50%;
  vertical-align: middle;
  box-shadow: 0 0 10px currentColor;
}
@media (max-width: 900px) {
  #leftPanel, #rightPanel { width: 180px; font-size: 0.82rem; }
}
@media (max-width: 720px) {
  #leftPanel, #rightPanel { display: none; }
  #topBar {
    top: max(10px, env(safe-area-inset-top));
    left: max(10px, env(safe-area-inset-left));
    right: max(10px, env(safe-area-inset-right));
    min-height: 38px;
    padding: 7px 9px;
    font-size: 0.68rem;
    gap: 8px;
    letter-spacing: 0.06em;
  }
  #topBar .topLeft, #topBar .topRight { gap: 8px; }
  #topBar .topLeft span:nth-child(2),
  #topBar .topLeft span:nth-child(3) { display: none; }
  #bottomBar {
    bottom: max(12px, env(safe-area-inset-bottom));
    width: min(620px, calc(100vw - 20px));
    padding: 8px 10px;
    gap: 10px;
    font-size: 0.62rem;
    letter-spacing: 0.05em;
  }
  #bottomBar span:nth-child(2),
  #bottomBar span:nth-child(3),
  #bottomBar span:nth-child(4) { display: none; }
  #reticle { width: 78px; height: 78px; }
  #centerMessage {
    top: calc(50% - 92px);
    max-width: calc(100vw - 28px);
    white-space: normal;
    text-align: center;
    font-size: 0.78rem;
  }
  .introPanel {
    width: min(94vw, 560px);
    padding: 24px 18px 18px;
  }
  .brand {
    font-size: clamp(1.72rem, 10vw, 2.6rem);
    letter-spacing: 0.04em;
  }
  .subtitle { letter-spacing: 0.10em; }
  .blurb { font-size: 0.92rem; line-height: 1.42; }
  .controls { margin-bottom: 12px; }
  .controlKey {
    gap: 6px;
    font-size: 0.73rem;
    margin-bottom: 10px;
  }
  .controlKey div {
    align-items: flex-start;
    gap: 6px;
    min-height: 0;
    padding: 6px 8px;
  }
  .controlKey span {
    flex-basis: 58px;
    font-size: 0.62rem;
    letter-spacing: 0.04em;
  }
  button {
    flex: 1 1 150px;
    padding: 11px 12px;
    font-size: 0.82rem;
    letter-spacing: 0.05em;
  }
  .legend {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    font-size: 0.76rem;
  }
  .legend div { padding: 7px 8px; }
}