@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@500;700;900&family=Rajdhani:wght@400;600&display=swap');

:root {
  --cyan: #38f0ff;
  --blue: #3a7bff;
  --purple: #a55cff;
  --orange: #ff9a2e;
  --red: #ff3b5c;
  --green: #4dff9e;
  --bg: #02030a;
  --panel: rgba(6, 12, 30, 0.82);
  --border: rgba(56, 240, 255, 0.35);
  --font-display: 'Orbitron', 'Segoe UI', sans-serif;
  --font-body: 'Rajdhani', 'Segoe UI', sans-serif;
}

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

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: #e6f7ff;
  font-family: var(--font-body);
  user-select: none;
  -webkit-user-select: none;
}

#game-container { position: relative; width: 100vw; height: 100vh; }

#game-canvas {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  cursor: crosshair;
}

.screen { position: absolute; inset: 0; }
.hidden { display: none !important; }

/* ---------- Overlays ---------- */
.overlay {
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(ellipse at center, rgba(4, 10, 30, 0.35) 0%, rgba(2, 3, 10, 0.7) 100%);
  backdrop-filter: blur(2px);
  z-index: 10;
  animation: fadeIn 0.4s ease-out;
}

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 40px 56px;
  text-align: center;
  min-width: 380px;
  max-width: 90vw;
  box-shadow:
    0 0 40px rgba(56, 240, 255, 0.15),
    inset 0 0 60px rgba(56, 240, 255, 0.04);
  position: relative;
}

.panel::before, .panel::after {
  content: '';
  position: absolute;
  width: 28px; height: 28px;
  border: 2px solid var(--cyan);
}
.panel::before { top: -2px; left: -2px; border-right: none; border-bottom: none; }
.panel::after { bottom: -2px; right: -2px; border-left: none; border-top: none; }

.title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.6rem, 7vw, 4.6rem);
  letter-spacing: 0.18em;
  color: #fff;
  text-shadow:
    0 0 10px var(--cyan),
    0 0 30px rgba(56, 240, 255, 0.6),
    0 0 60px rgba(58, 123, 255, 0.4);
  margin-bottom: 6px;
  animation: titlePulse 3s ease-in-out infinite;
}
.title span {
  color: var(--cyan);
  text-shadow: 0 0 10px var(--cyan), 0 0 40px var(--blue);
}

@keyframes titlePulse {
  0%, 100% { text-shadow: 0 0 10px var(--cyan), 0 0 30px rgba(56,240,255,0.6); }
  50% { text-shadow: 0 0 16px var(--cyan), 0 0 50px rgba(56,240,255,0.9), 0 0 80px rgba(165,92,255,0.5); }
}

.subtitle {
  font-size: 1.05rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: rgba(200, 235, 255, 0.6);
  margin-bottom: 32px;
}

.heading {
  font-family: var(--font-display);
  font-size: 2.6rem;
  letter-spacing: 0.2em;
  margin-bottom: 24px;
  color: #fff;
  text-shadow: 0 0 20px var(--cyan);
}
.heading.danger { color: #fff; text-shadow: 0 0 20px var(--red), 0 0 40px rgba(255, 59, 92, 0.6); }

.primary-btn, .secondary-btn {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.2em;
  padding: 14px 40px;
  margin: 8px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.18s ease;
  text-transform: uppercase;
}

.primary-btn {
  background: linear-gradient(135deg, rgba(56, 240, 255, 0.2), rgba(58, 123, 255, 0.3));
  border: 1px solid var(--cyan);
  color: #fff;
  box-shadow: 0 0 20px rgba(56, 240, 255, 0.3), inset 0 0 20px rgba(56, 240, 255, 0.1);
}
.primary-btn:hover {
  background: linear-gradient(135deg, rgba(56, 240, 255, 0.4), rgba(58, 123, 255, 0.5));
  box-shadow: 0 0 40px rgba(56, 240, 255, 0.6), inset 0 0 20px rgba(56, 240, 255, 0.2);
  transform: translateY(-2px);
}

.secondary-btn {
  background: transparent;
  border: 1px solid rgba(200, 235, 255, 0.3);
  color: rgba(200, 235, 255, 0.8);
}
.secondary-btn:hover { border-color: var(--cyan); color: #fff; }

.controls {
  margin-top: 28px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  text-align: left;
}
.control-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
  color: rgba(200, 235, 255, 0.85);
}
.control-row span { margin-left: auto; color: rgba(200, 235, 255, 0.55); letter-spacing: 0.1em; text-transform: uppercase; font-size: 0.8rem; }

kbd {
  font-family: var(--font-display);
  font-size: 0.72rem;
  padding: 4px 9px;
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 4px;
  background: rgba(56, 240, 255, 0.08);
  color: var(--cyan);
  letter-spacing: 0.05em;
}

.menu-highscore {
  margin-top: 28px;
  font-family: var(--font-display);
  font-size: 0.85rem;
  letter-spacing: 0.25em;
  color: rgba(200, 235, 255, 0.55);
}
.menu-highscore span { color: var(--orange); text-shadow: 0 0 12px rgba(255, 154, 46, 0.6); margin-left: 8px; }

.stats { display: flex; flex-direction: column; gap: 10px; margin-bottom: 18px; }
.stat { display: flex; justify-content: space-between; gap: 40px; font-family: var(--font-display); }
.stat-label { font-size: 0.8rem; letter-spacing: 0.2em; color: rgba(200, 235, 255, 0.55); }
.stat-value { font-size: 1.15rem; font-weight: 700; color: var(--cyan); text-shadow: 0 0 10px rgba(56, 240, 255, 0.6); }

.new-record {
  font-family: var(--font-display);
  color: var(--orange);
  letter-spacing: 0.3em;
  font-size: 0.9rem;
  margin-bottom: 18px;
  text-shadow: 0 0 14px rgba(255, 154, 46, 0.8);
  animation: blink 1s ease-in-out infinite;
}
@keyframes blink { 50% { opacity: 0.35; } }

/* ---------- HUD ---------- */
#hud { pointer-events: none; z-index: 5; }
#hud button { pointer-events: auto; }

.hud-top-left, .hud-top-right, .hud-bottom-left, .hud-bottom-right {
  position: absolute;
  padding: 22px 28px;
}
.hud-top-left { top: 0; left: 0; }
.hud-top-right { top: 0; right: 0; text-align: right; }
.hud-bottom-left { bottom: 0; left: 0; }
.hud-bottom-right { bottom: 0; right: 0; display: flex; gap: 8px; }

.hud-label {
  font-family: var(--font-display);
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  color: rgba(56, 240, 255, 0.7);
}
.hud-label.small { margin-top: 10px; font-size: 0.6rem; }

.hud-value {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.9rem;
  color: #fff;
  text-shadow: 0 0 12px rgba(56, 240, 255, 0.7);
  line-height: 1.1;
}
.hud-value.small { font-size: 1.05rem; color: rgba(230, 247, 255, 0.85); }
.hud-value.weapon { color: var(--orange); text-shadow: 0 0 12px rgba(255, 154, 46, 0.6); }

.hud-multiplier {
  margin-top: 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.2rem;
  color: var(--orange);
  text-shadow: 0 0 12px rgba(255, 154, 46, 0.8);
  transition: transform 0.1s ease;
}
.hud-multiplier.hot { color: var(--red); text-shadow: 0 0 16px var(--red); }
.hud-multiplier.pop { transform: scale(1.35); }

.hud-powerups { margin-top: 12px; display: flex; flex-direction: column; gap: 5px; align-items: flex-end; }
.powerup-chip {
  font-family: var(--font-display);
  font-size: 0.62rem;
  letter-spacing: 0.15em;
  padding: 4px 10px;
  border-radius: 3px;
  border: 1px solid currentColor;
  background: rgba(0, 0, 0, 0.4);
  position: relative;
  overflow: hidden;
  min-width: 120px;
  text-align: left;
}
.powerup-chip .chip-fill {
  position: absolute;
  left: 0; top: 0; bottom: 0;
  background: currentColor;
  opacity: 0.22;
}
.powerup-chip .chip-text { position: relative; z-index: 1; }

.bar-row { display: flex; align-items: center; gap: 12px; margin-top: 8px; }
.bar-label {
  font-family: var(--font-display);
  font-size: 0.65rem;
  letter-spacing: 0.25em;
  width: 58px;
  color: rgba(56, 240, 255, 0.7);
}
.bar {
  width: 240px;
  height: 12px;
  background: rgba(0, 0, 0, 0.55);
  border: 1px solid rgba(56, 240, 255, 0.3);
  border-radius: 2px;
  overflow: hidden;
  position: relative;
  transform: skewX(-12deg);
}
.bar-fill {
  height: 100%;
  width: 100%;
  transition: width 0.15s ease-out;
}
.health-bar .bar-fill {
  background: linear-gradient(90deg, #ff7a2e, #ffd23a);
  box-shadow: 0 0 12px rgba(255, 154, 46, 0.7);
}
.health-bar .bar-fill.low {
  background: linear-gradient(90deg, #ff2e4d, #ff6a2e);
  box-shadow: 0 0 14px var(--red);
  animation: blink 0.5s ease-in-out infinite;
}
.shield-bar .bar-fill {
  background: linear-gradient(90deg, #2e7bff, #38f0ff);
  box-shadow: 0 0 12px rgba(56, 240, 255, 0.7);
}

.icon-btn {
  font-family: var(--font-display);
  font-size: 0.62rem;
  letter-spacing: 0.15em;
  padding: 7px 12px;
  background: rgba(0, 0, 0, 0.45);
  border: 1px solid rgba(56, 240, 255, 0.3);
  color: rgba(200, 235, 255, 0.8);
  border-radius: 3px;
  cursor: pointer;
  transition: all 0.15s;
}
.icon-btn:hover { border-color: var(--cyan); color: #fff; background: rgba(56, 240, 255, 0.12); }

.boss-bar-container {
  position: absolute;
  top: 26px;
  left: 50%;
  transform: translateX(-50%);
  width: min(520px, 60vw);
  text-align: center;
}
.boss-name {
  font-family: var(--font-display);
  font-size: 0.85rem;
  letter-spacing: 0.4em;
  color: var(--red);
  text-shadow: 0 0 14px var(--red);
  margin-bottom: 6px;
}
.boss-bar {
  height: 14px;
  background: rgba(0, 0, 0, 0.6);
  border: 1px solid rgba(255, 59, 92, 0.6);
  border-radius: 2px;
  overflow: hidden;
}
.boss-bar-fill {
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, #ff3b5c, #ff9a2e);
  box-shadow: 0 0 16px var(--red);
  transition: width 0.12s ease-out;
}

.wave-announce {
  position: absolute;
  top: 34%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.2rem, 6vw, 4.2rem);
  letter-spacing: 0.35em;
  color: #fff;
  text-shadow: 0 0 20px var(--cyan), 0 0 60px rgba(56, 240, 255, 0.7);
  white-space: nowrap;
  animation: waveIn 2.4s ease-out forwards;
}
.wave-announce.boss { color: #fff; text-shadow: 0 0 20px var(--red), 0 0 60px rgba(255, 59, 92, 0.8); }
.wave-announce.small { font-size: clamp(1.1rem, 3vw, 1.8rem); letter-spacing: 0.25em; top: 42%; animation: waveIn 1.6s ease-out forwards; }

@keyframes waveIn {
  0% { opacity: 0; transform: translate(-50%, -50%) scale(1.6); letter-spacing: 0.8em; }
  15% { opacity: 1; transform: translate(-50%, -50%) scale(1); letter-spacing: 0.35em; }
  80% { opacity: 1; }
  100% { opacity: 0; transform: translate(-50%, -60%) scale(0.95); }
}

.damage-vignette {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(ellipse at center, transparent 55%, rgba(255, 40, 60, 0.55) 100%);
  opacity: 0;
  transition: opacity 0.1s;
}

.crosshair {
  position: absolute;
  width: 26px; height: 26px;
  border: 1.5px solid rgba(56, 240, 255, 0.6);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
  left: 50%; top: 50%;
  box-shadow: 0 0 8px rgba(56, 240, 255, 0.5);
}
.crosshair::before, .crosshair::after {
  content: '';
  position: absolute;
  background: rgba(56, 240, 255, 0.7);
}
.crosshair::before { left: 50%; top: -6px; width: 1.5px; height: 6px; transform: translateX(-50%); box-shadow: 0 30px 0 rgba(56,240,255,0.7); }
.crosshair::after { top: 50%; left: -6px; height: 1.5px; width: 6px; transform: translateY(-50%); box-shadow: 30px 0 0 rgba(56,240,255,0.7); }

@media (max-width: 700px) {
  .panel { padding: 28px 24px; min-width: 0; }
  .bar { width: 150px; }
  .hud-top-left, .hud-top-right, .hud-bottom-left, .hud-bottom-right { padding: 14px 16px; }
  .hud-value { font-size: 1.4rem; }
}