:root {
  --neon-blue: #00f3ff;
  --neon-pink: #ff006e;
  --bg-color: #050510;
}

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

html, body {
  height: 100%;
}

body {
  background-color: var(--bg-color);
  color: white;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  overflow: hidden;
  user-select: none;
}

/* Sistema de Pantallas */
.screen {
  position: absolute;
  top: 0; left: 0;
  width: 100vw; height: 100vh;
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 10;
}
.screen.active { display: flex; }

/* Fondos para menús con ligero overlay */
#main-menu, #game-over-screen {
  background: rgba(5, 5, 16, 0.85);
  backdrop-filter: blur(5px);
}

canvas {
  position: absolute;
  top: 0; left: 0;
  z-index: 1;
}

/* Tipografía y Textos */
.title {
  font-size: 4rem;
  font-weight: 900;
  color: #fff;
  text-shadow: 0 0 10px var(--neon-blue), 0 0 20px var(--neon-blue), 0 0 40px var(--neon-blue);
  margin-bottom: 40px;
  text-align: center;
  letter-spacing: 5px;
}

.game-over-title {
  font-size: 4rem;
  color: #fff;
  text-shadow: 0 0 10px var(--neon-pink), 0 0 20px var(--neon-pink);
  margin-bottom: 20px;
}

.score-container {
  margin-bottom: 30px;
  text-align: center;
  font-size: 1.5rem;
  color: var(--neon-blue);
}

/* Botones Neon */
.menu-btn {
  background: transparent;
  border: 2px solid var(--neon-blue);
  color: var(--neon-blue);
  padding: 15px 40px;
  font-size: 1.2rem;
  font-weight: bold;
  cursor: pointer;
  border-radius: 5px;
  text-transform: uppercase;
  letter-spacing: 2px;
  box-shadow: 0 0 10px var(--neon-blue) inset, 0 0 10px var(--neon-blue);
  transition: all 0.3s ease;
  margin: 10px;
}
.menu-btn:hover {
  background: var(--neon-blue);
  color: var(--bg-color);
  box-shadow: 0 0 20px var(--neon-blue) inset, 0 0 20px var(--neon-blue);
  transform: scale(1.05);
}

#restart-btn { border-color: var(--neon-pink); color: var(--neon-pink); box-shadow: 0 0 10px var(--neon-pink) inset, 0 0 10px var(--neon-pink); }
#restart-btn:hover { background: var(--neon-pink); color: #fff; box-shadow: 0 0 20px var(--neon-pink) inset, 0 0 20px var(--neon-pink); }

/* Tabla de Controles */
.controls-list {
  margin-top: 40px;
  border: 1px solid rgba(0, 243, 255, 0.3);
  padding: 20px;
  border-radius: 10px;
  background: rgba(0, 0, 0, 0.5);
}
.controls-table .row {
  display: flex; justify-content: space-between; width: 250px;
  margin-bottom: 10px; color: #ccc;
}

/* HUD en el juego */
.hud {
  position: absolute; top: 20px; left: 20px;
  z-index: 20; display: flex; gap: 30px;
  font-size: 1.2rem; font-weight: bold; color: #fff;
  text-shadow: 0 0 5px var(--neon-blue);
}

/* Connected users display */
#connected-users {
  font-size: 1rem;
  color: var(--neon-pink);
  border: 1px solid rgba(255,0,110,0.12);
  padding: 6px 10px;
  border-radius: 6px;
  background: rgba(255,0,110,0.03);
  align-self: center;
  min-width: 120px;
  text-align: center;
}

#pause-btn {
  position: absolute; top: 20px; right: 20px; z-index: 20;
  background: transparent; border: 2px solid var(--neon-blue); color: var(--neon-blue);
  width: 44px; height: 44px; border-radius: 50%; font-size: 1.2rem; cursor: pointer;
}

#fullscreen-btn {
  position: absolute;
  top: 20px;
  right: 80px;
  z-index: 20;
  background: transparent;
  border: 2px solid var(--neon-blue);
  color: var(--neon-blue);
  width: 44px;
  height: 44px;
  border-radius: 6px;
  font-size: 0.95rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}
#fullscreen-btn:hover {
  background: var(--neon-blue);
  color: var(--bg-color);
  transform: scale(1.03);
}

/* Footer */
.footer { position: absolute; bottom: 10px; text-align: center; width: 100%; font-size: 0.8rem; color: #888; }
.paypal-btn { color: var(--neon-pink); text-decoration: none; font-weight: bold; }

/* Ensure interactive elements are touch-friendly */
.menu-btn, #pause-btn { min-height: 44px; min-width: 44px; }

/* Selectors styling for weapon/env controls */
select {
  -webkit-appearance: none;
  appearance: none;
  background: rgba(0,0,0,0.35);
  border: 1px solid rgba(0,243,255,0.06);
  color: #fff;
  padding: 8px 10px;
  border-radius: 8px;
  font-size: 0.95rem;
}

/* Touch control zones overlay */
#touch-controls { position: absolute; inset: 0; z-index: 30; display: flex; pointer-events: none; }
.touch-zone {
  flex: 1;
  min-width: 44px;
  pointer-events: auto;
  touch-action: none;
}
#left-touch { background: linear-gradient(90deg, rgba(0,0,0,0.02), transparent); }
#right-touch { background: linear-gradient(270deg, rgba(0,0,0,0.02), transparent); }

/* Central shoot button (small, touch-friendly) */
.shoot-btn {
  position: absolute;
  right: 18px;
  bottom: 18px;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(0,243,255,0.06);
  border: 2px solid var(--neon-blue);
  box-shadow: 0 0 10px var(--neon-blue);
  pointer-events: auto;
  z-index: 31;
}

/* Visual hint when pressing */
.touch-zone:active, .shoot-btn:active { transform: scale(0.98); opacity: 0.9; }

/* Bomb visuals if needed in UI */
.bomb-indicator {
  position: absolute;
  left: 18px;
  bottom: 18px;
  color: orange;
  z-index: 31;
  font-weight: bold;
}

/* Tutorial modal styles */
.tutorial-modal {
  position: absolute;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 60;
  background: rgba(0,0,0,0.6);
  padding: 20px;
}
.tutorial-modal[aria-hidden="false"] { display: flex; }

.tutorial-card {
  width: min(720px, 92%);
  max-height: 86vh;
  overflow: auto;
  background: linear-gradient(180deg, rgba(10,10,20,0.95), rgba(8,8,16,0.95));
  border: 2px solid rgba(0,243,255,0.08);
  padding: 18px;
  border-radius: 12px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.6);
  color: #fff;
  text-align: left;
}
.tutorial-card h2 { margin-bottom: 8px; font-size: 1.6rem; color: var(--neon-pink); text-shadow: 0 0 8px var(--neon-pink); }
.tutorial-card h3 { margin-top: 12px; margin-bottom: 6px; color: var(--neon-blue); }
.tutorial-step { margin-bottom: 8px; font-size: 0.98rem; color: #ddd; }
.tutorial-step ul { padding-left: 18px; color: #ddd; }
.tutorial-nav { display:flex; gap:8px; justify-content:center; margin-top: 12px; flex-wrap:wrap; }
.menu-btn.small { padding: 8px 14px; font-size: 0.9rem; }

/* Donate modal styling (reuses tutorial modal look) */
#donate-modal { z-index: 70; }
#donate-modal .tutorial-card h2 { color: var(--neon-blue); text-shadow: 0 0 6px var(--neon-blue); }
#donate-modal .tutorial-card p, #donate-modal .tutorial-card ul { color: #e6eef6; }

/* Yappy QR styling inside donate modal */
.donate-qr {
  width: min(360px, 86%);
  height: auto;
  border-radius: 10px;
  border: 2px solid rgba(255,255,255,0.06);
  box-shadow: 0 8px 30px rgba(0,0,0,0.6), 0 0 18px rgba(255,255,255,0.04) inset;
  background: #fff;
  max-height: 58vh;
  object-fit: contain;
}