* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  width: 100%; height: 100%;
  overflow: hidden;
  font-family: 'Courier New', Courier, monospace;
  background: #050c18;
  color: #e0eeff;
}

#gameCanvas { display: block; width: 100vw; height: 100vh; }

/* ── Damage overlay ─────────────────────────────────────────── */
#damageOverlay {
  position: fixed; inset: 0; z-index: 20;
  background: radial-gradient(ellipse at center, transparent 20%, #cc0000 100%);
  opacity: 0; pointer-events: none;
}

/* ── Scope overlay (right-click ADS) ───────────────────────── */
#scopeOverlay {
  position: fixed;
  left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  width: 58vmin; height: 58vmin;
  border-radius: 50%;
  z-index: 17;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.1s ease;
  box-shadow: 0 0 0 100vmax rgba(0, 0, 0, 0.88);
  border: 1px solid rgba(0, 200, 255, 0.25);
}

/* ── Crosshair ──────────────────────────────────────────────── */
#crosshair {
  position: fixed; left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  z-index: 15; pointer-events: none;
  width: 18px; height: 18px;
}
#crosshair::before, #crosshair::after {
  content: ''; position: absolute;
  background: rgba(255,255,255,0.9);
  border-radius: 1px;
}
#crosshair::before { width: 2px; height: 100%; left: 50%; transform: translateX(-50%); }
#crosshair::after  { height: 2px; width: 100%; top: 50%;  transform: translateY(-50%); }

/* ── HUD ────────────────────────────────────────────────────── */
#hud {
  position: fixed; top: 14px; left: 14px; z-index: 10;
  background: rgba(2, 8, 20, 0.84);
  border: 1px solid rgba(80, 140, 255, 0.25);
  border-radius: 10px;
  padding: 12px 16px 10px;
  min-width: 210px;
  backdrop-filter: blur(6px);
  box-shadow: 0 0 24px rgba(0, 60, 200, 0.18), inset 0 0 0 1px rgba(255,255,255,0.04);
}

#hudTitle {
  font-size: 13px; font-weight: 700;
  letter-spacing: 4px; color: #55aaff;
  margin-bottom: 10px;
  text-shadow: 0 0 10px #2277ff;
}

.hud-row {
  display: flex; align-items: center; gap: 8px;
  margin: 5px 0; font-size: 12px;
}
.hud-label {
  color: #607898; font-size: 10px;
  letter-spacing: 1px; width: 40px;
}
#playerHealth, #waveNum, #score, #ammo {
  min-width: 58px; text-align: right;
  font-weight: 700; color: #cce0ff; font-size: 13px;
}

#healthBarWrap {
  flex: 1; height: 6px;
  background: rgba(255,255,255,0.1);
  border-radius: 3px; overflow: hidden;
}
#healthBar {
  height: 100%; width: 100%;
  border-radius: 3px;
  background: linear-gradient(90deg, #22cc55, #88ff44);
  transition: width 0.12s, background 0.3s;
}

#message {
  margin-top: 9px; font-size: 10px;
  color: #5578a0; line-height: 1.5;
  letter-spacing: 0.5px;
}

/* ── Wave Announce ──────────────────────────────────────────── */
#waveAnnounce {
  position: fixed; inset: 0; z-index: 12;
  display: flex; align-items: center; justify-content: center;
  pointer-events: none;
}
#waveAnnounceText {
  font-size: 64px; font-weight: 900;
  letter-spacing: 8px; color: #ffffff;
  text-shadow: 0 0 30px #3af, 0 0 70px #08f;
  opacity: 0;
  transition: opacity 0.5s;
}

/* ── START SCREEN ───────────────────────────────────────────── */
#startScreen {
  position: fixed; inset: 0; z-index: 100;
  background: radial-gradient(ellipse at 50% 40%, #061428 0%, #020810 70%);
  display: flex; align-items: center; justify-content: center;
}

/* Animated scan-line effect */
#startScreen::before {
  content: '';
  position: absolute; inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 100, 200, 0.03) 2px,
    rgba(0, 100, 200, 0.03) 4px
  );
  pointer-events: none;
}

#startContent {
  position: relative; z-index: 1;
  text-align: center;
  display: flex; flex-direction: column;
  align-items: center; gap: 0;
  max-width: 520px; width: 90%;
}

.start-badge {
  font-size: 10px; letter-spacing: 5px;
  color: #3a7abf; margin-bottom: 16px;
  border: 1px solid #1a3a5e;
  padding: 4px 14px; border-radius: 20px;
}

#gameTitle {
  font-size: 80px; font-weight: 900;
  line-height: 0.9;
  letter-spacing: 14px;
  color: #fff;
  text-shadow:
    0 0 20px rgba(50,150,255,0.9),
    0 0 60px rgba(30,100,255,0.5),
    0 0 120px rgba(20,80,220,0.3);
  margin-bottom: 36px;
  animation: titlePulse 3s ease-in-out infinite;
}

@keyframes titlePulse {
  0%, 100% { text-shadow: 0 0 20px rgba(50,150,255,0.9), 0 0 60px rgba(30,100,255,0.5); }
  50%       { text-shadow: 0 0 30px rgba(80,180,255,1),  0 0 90px rgba(50,130,255,0.7); }
}

#controlsGrid {
  background: rgba(5, 15, 30, 0.7);
  border: 1px solid rgba(60, 120, 200, 0.2);
  border-radius: 10px;
  padding: 18px 28px;
  margin-bottom: 20px;
  width: 100%;
}

.ctrl-row {
  display: flex; align-items: center;
  gap: 16px; padding: 7px 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  font-size: 13px; color: #a0bcd8;
}
.ctrl-row:last-child { border-bottom: none; }

.ctrl-keys {
  display: flex; gap: 4px;
  min-width: 90px; justify-content: flex-start;
}

kbd {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 32px; height: 26px; padding: 0 8px;
  background: rgba(20, 60, 120, 0.6);
  border: 1px solid rgba(80, 140, 220, 0.5);
  border-radius: 5px;
  font-family: inherit; font-size: 12px; font-weight: 700;
  color: #88ccff;
  box-shadow: 0 2px 0 rgba(0,0,0,0.4);
}

#enemyLegend {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 8px 24px;
  background: rgba(5, 15, 30, 0.7);
  border: 1px solid rgba(60, 120, 200, 0.2);
  border-radius: 10px;
  padding: 14px 24px;
  margin-bottom: 32px;
  width: 100%;
}
.legend-item {
  display: flex; align-items: center; gap: 8px;
  font-size: 12px; color: #7090b0;
}
.dot {
  width: 10px; height: 10px;
  border-radius: 50%; flex-shrink: 0;
  box-shadow: 0 0 6px currentColor;
}

#startBtn {
  padding: 16px 64px;
  font-family: inherit; font-size: 16px;
  font-weight: 900; letter-spacing: 3px;
  color: #ffffff;
  background: linear-gradient(135deg, #1155dd 0%, #2277ff 100%);
  border: 2px solid rgba(100, 180, 255, 0.5);
  border-radius: 8px;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s, background 0.15s;
  box-shadow: 0 0 30px rgba(30, 100, 255, 0.4), 0 4px 20px rgba(0,0,0,0.5);
  animation: btnGlow 2s ease-in-out infinite;
}
#startBtn:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 0 50px rgba(50, 150, 255, 0.7), 0 6px 24px rgba(0,0,0,0.6);
  background: linear-gradient(135deg, #1a66ff 0%, #44aaff 100%);
}
#startBtn:active { transform: translateY(0) scale(0.98); }

@keyframes btnGlow {
  0%, 100% { box-shadow: 0 0 30px rgba(30,100,255,0.4), 0 4px 20px rgba(0,0,0,0.5); }
  50%       { box-shadow: 0 0 50px rgba(60,140,255,0.7), 0 4px 20px rgba(0,0,0,0.5); }
}

/* ── END SCREEN ─────────────────────────────────────────────── */
#endScreen {
  position: fixed; inset: 0; z-index: 100;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0,0,0,0.88);
  backdrop-filter: blur(6px);
}
#endScreen[hidden] { display: none; }

#endContent {
  text-align: center;
  display: flex; flex-direction: column;
  align-items: center; gap: 0;
  max-width: 460px; width: 90%;
  background: rgba(4, 12, 28, 0.95);
  border: 1px solid rgba(80, 140, 255, 0.3);
  border-radius: 16px;
  padding: 48px 40px;
  box-shadow: 0 0 60px rgba(20, 60, 200, 0.3);
}

#endTitle {
  font-size: 56px; font-weight: 900;
  letter-spacing: 8px;
  margin-bottom: 10px;
}
#endTitle.victory {
  color: #44ffaa;
  text-shadow: 0 0 20px #00cc77, 0 0 50px #009955;
}
#endTitle.defeat {
  color: #ff4422;
  text-shadow: 0 0 20px #cc2200, 0 0 50px #aa1100;
}

#endSub {
  font-size: 13px; letter-spacing: 3px;
  color: #6090b8; margin-bottom: 28px;
}

#endStats {
  background: rgba(10, 25, 50, 0.8);
  border: 1px solid rgba(60,110,200,0.2);
  border-radius: 8px;
  padding: 16px 32px;
  margin-bottom: 32px;
  width: 100%;
}
.stat-row {
  display: flex; justify-content: space-between;
  font-size: 14px; padding: 6px 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  color: #99b8d8;
}
.stat-row:last-child { border-bottom: none; }
.stat-val { font-weight: 700; color: #cce4ff; }

#playAgainBtn {
  padding: 14px 56px;
  font-family: inherit; font-size: 15px;
  font-weight: 900; letter-spacing: 2px;
  color: #fff;
  background: linear-gradient(135deg, #1155dd, #2277ff);
  border: 2px solid rgba(100,180,255,0.4);
  border-radius: 8px; cursor: pointer;
  box-shadow: 0 0 30px rgba(30,100,255,0.4);
  transition: transform 0.15s, box-shadow 0.15s;
}
#playAgainBtn:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 0 50px rgba(60,150,255,0.7);
}