/* ============================================
   DEAD ZONE — Dark Gaming Aesthetic
   Palette: Volcanic Glass + Blood Red
   Fonts: Bebas Neue + Rajdhani + Share Tech Mono
   ============================================ */

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

:root {
  --blood:    #8B0000;
  --blood2:   #CC0000;
  --neon-red: #FF1A1A;
  --gold:     #FFD700;
  --coin:     #FFA500;
  --dark:     #0A0A0A;
  --dark2:    #111111;
  --dark3:    #1A1A1A;
  --panel:    #141414;
  --border:   #2A2A2A;
  --text:     #E8E4DF;
  --muted:    #888;
  --green:    #39FF14;
  --cyan:     #00FFFF;
}

html, body {
  width: 100%; height: 100%;
  overflow: hidden;
  background: var(--dark);
  font-family: 'Rajdhani', sans-serif;
  color: var(--text);
  cursor: crosshair;
  user-select: none;
}

/* ── SCREENS ── */
.screen {
  position: fixed; inset: 0;
  display: none;
  z-index: 10;
}
.screen.active { display: flex; }

/* ── MAIN MENU ── */
#mainMenu {
  align-items: center;
  justify-content: center;
  background: #000;
}

.menu-bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(139,0,0,0.3) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 50%, rgba(80,0,0,0.2) 0%, transparent 60%),
    url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23200000' fill-opacity='0.4'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  animation: bgPulse 4s ease-in-out infinite;
}

@keyframes bgPulse {
  0%,100% { opacity: 1; }
  50% { opacity: 0.7; }
}

.blood-drip {
  position: absolute; top: 0; left: 0; right: 0; height: 8px;
  background: linear-gradient(90deg, transparent, var(--blood2), var(--blood), var(--blood2), transparent);
  box-shadow: 0 0 20px var(--blood2), 0 0 40px var(--blood);
  animation: drip 3s ease-in-out infinite;
}

@keyframes drip {
  0%,100% { transform: scaleX(1); opacity: 1; }
  50% { transform: scaleX(0.95); opacity: 0.8; }
}

.menu-content {
  position: relative; z-index: 2;
  display: flex; flex-direction: column;
  align-items: center; gap: 32px;
  padding: 40px;
}

.game-logo {
  text-align: center;
  line-height: 1;
}

.logo-dead {
  display: block;
  font-family: 'Bebas Neue', sans-serif;
  font-size: clamp(80px, 15vw, 160px);
  color: var(--neon-red);
  text-shadow:
    0 0 20px var(--blood2),
    0 0 60px var(--blood),
    4px 4px 0 #000,
    -2px -2px 0 #500;
  letter-spacing: 0.05em;
  animation: logoFlicker 5s ease-in-out infinite;
}

.logo-zone {
  display: block;
  font-family: 'Bebas Neue', sans-serif;
  font-size: clamp(40px, 8vw, 80px);
  color: var(--text);
  letter-spacing: 0.3em;
  text-shadow: 2px 2px 0 #000;
  margin-top: -10px;
}

.logo-sub {
  font-family: 'Share Tech Mono', monospace;
  font-size: 13px;
  letter-spacing: 0.4em;
  color: var(--muted);
  margin-top: 8px;
  text-transform: uppercase;
}

@keyframes logoFlicker {
  0%,90%,100% { opacity: 1; }
  92% { opacity: 0.8; }
  94% { opacity: 1; }
  96% { opacity: 0.6; }
  98% { opacity: 1; }
}

/* Difficulty */
.section-label {
  font-family: 'Share Tech Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.4em;
  color: var(--muted);
  text-align: center;
  margin-bottom: 12px;
}

.diff-buttons {
  display: flex; gap: 12px;
  flex-wrap: wrap; justify-content: center;
}

.diff-btn {
  display: flex; flex-direction: column; align-items: center;
  gap: 4px;
  padding: 16px 24px;
  background: var(--dark3);
  border: 1px solid var(--border);
  color: var(--text);
  cursor: pointer;
  transition: all 0.2s;
  min-width: 140px;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
}

.diff-btn:hover {
  border-color: var(--blood2);
  background: rgba(139,0,0,0.2);
  transform: translateY(-2px);
}

.diff-btn.selected {
  border-color: var(--neon-red);
  background: rgba(204,0,0,0.15);
  box-shadow: 0 0 20px rgba(204,0,0,0.3), inset 0 0 20px rgba(204,0,0,0.05);
}

.diff-icon { font-size: 28px; }
.diff-name {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 20px;
  letter-spacing: 0.1em;
}
.diff-desc {
  font-size: 11px;
  color: var(--muted);
  font-family: 'Share Tech Mono', monospace;
}

/* Start Button */
.start-btn {
  position: relative;
  padding: 16px 60px;
  background: var(--blood);
  border: 2px solid var(--blood2);
  color: #fff;
  font-family: 'Bebas Neue', sans-serif;
  font-size: 28px;
  letter-spacing: 0.2em;
  cursor: pointer;
  clip-path: polygon(12px 0, 100% 0, calc(100% - 12px) 100%, 0 100%);
  transition: all 0.2s;
  overflow: hidden;
}

.start-btn:hover {
  background: var(--blood2);
  box-shadow: 0 0 30px rgba(204,0,0,0.6);
  transform: scale(1.03);
}

.btn-glow {
  position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
  transform: translateX(-100%);
  animation: btnShine 3s ease-in-out infinite;
}

@keyframes btnShine {
  0% { transform: translateX(-100%); }
  50%,100% { transform: translateX(100%); }
}

.controls-hint {
  display: flex; gap: 20px; flex-wrap: wrap;
  justify-content: center;
  font-family: 'Share Tech Mono', monospace;
  font-size: 11px;
  color: var(--muted);
}

/* ── GAME CANVAS ── */
#gameCanvas {
  position: fixed; inset: 0;
  width: 100%; height: 100%;
  display: block;
}

/* ── HUD ── */
#hud {
  position: fixed; inset: 0;
  pointer-events: none;
  z-index: 20;
}

.hud-label {
  font-family: 'Share Tech Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.3em;
  color: var(--muted);
  display: block;
  margin-bottom: 4px;
}

/* Top HUD */
.hud-top {
  position: absolute; top: 0; left: 0; right: 0;
  display: flex; justify-content: space-between; align-items: flex-start;
  padding: 12px 20px;
  background: linear-gradient(to bottom, rgba(0,0,0,0.8), transparent);
}

.hud-health {
  min-width: 200px;
}

.health-bar-wrap {
  display: flex; align-items: center; gap: 8px;
}

.health-bar {
  width: 160px; height: 12px;
  background: var(--dark3);
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.health-bar::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(90deg, var(--blood2), var(--neon-red));
  width: var(--hp, 100%);
  transition: width 0.3s ease;
  box-shadow: 0 0 8px var(--blood2);
}

#healthVal {
  font-family: 'Share Tech Mono', monospace;
  font-size: 14px;
  color: var(--neon-red);
  min-width: 30px;
}

.hud-center {
  display: flex; gap: 30px; align-items: center;
}

.wave-display, .score-display {
  text-align: center;
}

#waveNum {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 36px;
  color: var(--neon-red);
  text-shadow: 0 0 10px var(--blood2);
  display: block;
}

#scoreNum {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 28px;
  color: var(--gold);
  text-shadow: 0 0 10px rgba(255,215,0,0.5);
  display: block;
}

.hud-coins {
  text-align: right;
}

.coin-display {
  display: flex; align-items: center; gap: 6px;
  justify-content: flex-end;
}

.coin-icon { font-size: 18px; }

#coinCount {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 28px;
  color: var(--coin);
  text-shadow: 0 0 10px rgba(255,165,0,0.5);
}

/* Boss Bar */
.boss-bar {
  position: absolute; top: 70px; left: 50%; transform: translateX(-50%);
  width: min(500px, 80vw);
  text-align: center;
}

.boss-bar.hidden { display: none; }

.boss-label {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 16px;
  letter-spacing: 0.2em;
  color: var(--neon-red);
  text-shadow: 0 0 10px var(--blood2);
  margin-bottom: 6px;
  animation: bossFlicker 1s ease-in-out infinite;
}

@keyframes bossFlicker {
  0%,100% { opacity: 1; }
  50% { opacity: 0.7; }
}

.boss-health-wrap {
  height: 16px;
  background: var(--dark3);
  border: 1px solid var(--blood2);
  box-shadow: 0 0 15px rgba(204,0,0,0.4);
  overflow: hidden;
}

.boss-health-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--blood), var(--neon-red), #FF6600);
  width: 100%;
  transition: width 0.4s ease;
  box-shadow: 0 0 10px var(--neon-red);
  animation: bossHealthPulse 0.5s ease-in-out infinite;
}

@keyframes bossHealthPulse {
  0%,100% { filter: brightness(1); }
  50% { filter: brightness(1.3); }
}

/* Bottom HUD */
.hud-bottom {
  position: absolute; bottom: 0; left: 0; right: 0;
  display: flex; justify-content: space-between; align-items: flex-end;
  padding: 16px 20px;
  background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
}

.ammo-display {
  min-width: 160px;
}

.gun-name {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 22px;
  letter-spacing: 0.15em;
  color: var(--cyan);
  text-shadow: 0 0 8px rgba(0,255,255,0.4);
}

.ammo-count {
  font-family: 'Share Tech Mono', monospace;
  font-size: 28px;
  color: var(--text);
}

.ammo-sep { color: var(--muted); margin: 0 4px; }

#ammoReserve { font-size: 18px; color: var(--muted); }

.reload-bar {
  margin-top: 6px;
  height: 4px;
  background: var(--dark3);
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.reload-bar span {
  position: absolute; top: 6px; left: 0;
  font-family: 'Share Tech Mono', monospace;
  font-size: 10px;
  color: var(--gold);
  letter-spacing: 0.2em;
  white-space: nowrap;
}

.reload-fill {
  height: 100%;
  background: var(--gold);
  width: 0%;
  transition: width linear;
  box-shadow: 0 0 6px var(--gold);
}

.reload-bar.hidden { display: none; }

/* Crosshair */
.crosshair-area {
  position: absolute; left: 50%; top: 50%;
  transform: translate(-50%, -50%);
}

.crosshair {
  width: 24px; height: 24px;
  position: relative;
}

.crosshair::before, .crosshair::after {
  content: '';
  position: absolute;
  background: rgba(255,255,255,0.9);
  box-shadow: 0 0 4px rgba(255,255,255,0.5);
}

.crosshair::before {
  width: 2px; height: 100%;
  left: 50%; transform: translateX(-50%);
}

.crosshair::after {
  height: 2px; width: 100%;
  top: 50%; transform: translateY(-50%);
}

.crosshair.shooting {
  animation: crosshairShoot 0.1s ease-out;
}

@keyframes crosshairShoot {
  0% { transform: scale(1.5); }
  100% { transform: scale(1); }
}

/* Minimap */
.minimap-wrap {
  position: relative;
  text-align: center;
}

#minimap {
  border: 1px solid var(--border);
  background: rgba(0,0,0,0.7);
  display: block;
}

.minimap-label {
  font-family: 'Share Tech Mono', monospace;
  font-size: 9px;
  letter-spacing: 0.3em;
  color: var(--muted);
  margin-top: 2px;
}

/* Zombie counter */
.zombie-counter {
  position: absolute; top: 12px; right: 20px;
  text-align: right;
  margin-top: 50px;
}

#zombieCount {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 24px;
  color: var(--green);
  text-shadow: 0 0 8px rgba(57,255,20,0.4);
  display: block;
}

/* Coin popup */
.coin-popup {
  position: absolute;
  font-family: 'Bebas Neue', sans-serif;
  font-size: 28px;
  color: var(--gold);
  text-shadow: 0 0 10px rgba(255,215,0,0.8);
  pointer-events: none;
  animation: coinFloat 1.2s ease-out forwards;
  left: 50%; top: 40%;
  transform: translateX(-50%);
}

.coin-popup.hidden { display: none; }

@keyframes coinFloat {
  0% { opacity: 1; transform: translateX(-50%) translateY(0) scale(1); }
  100% { opacity: 0; transform: translateX(-50%) translateY(-60px) scale(1.3); }
}

/* Damage flash */
.damage-flash {
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at center, transparent 40%, rgba(204,0,0,0.6) 100%);
  pointer-events: none;
  animation: flashFade 0.4s ease-out forwards;
}

.damage-flash.hidden { display: none; }

@keyframes flashFade {
  0% { opacity: 1; }
  100% { opacity: 0; }
}

/* Kill feed */
.kill-feed {
  position: absolute; top: 80px; right: 20px;
  display: flex; flex-direction: column; gap: 4px;
  align-items: flex-end;
}

.kill-entry {
  font-family: 'Share Tech Mono', monospace;
  font-size: 12px;
  color: var(--neon-red);
  background: rgba(0,0,0,0.6);
  padding: 3px 8px;
  border-left: 2px solid var(--blood2);
  animation: killFade 2.5s ease-out forwards;
}

@keyframes killFade {
  0%,70% { opacity: 1; transform: translateX(0); }
  100% { opacity: 0; transform: translateX(20px); }
}

.shop-hint {
  position: absolute; bottom: 80px; right: 20px;
  font-family: 'Share Tech Mono', monospace;
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.2em;
  animation: hintPulse 2s ease-in-out infinite;
}

@keyframes hintPulse {
  0%,100% { opacity: 0.5; }
  50% { opacity: 1; }
}

/* Weapon sprite */
.weapon-sprite {
  position: fixed;
  bottom: 60px; right: 40px;
  pointer-events: none;
  z-index: 15;
}

#weaponCanvas {
  display: block;
  filter: drop-shadow(0 4px 12px rgba(0,0,0,0.8));
}

/* ── SHOP OVERLAY ── */
.overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.85);
  z-index: 50;
  display: flex; align-items: center; justify-content: center;
  backdrop-filter: blur(4px);
}

.overlay.hidden { display: none; }

.shop-panel {
  background: var(--panel);
  border: 1px solid var(--border);
  width: min(700px, 95vw);
  max-height: 85vh;
  overflow-y: auto;
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 20px 100%, 0 calc(100% - 20px));
}

.shop-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--dark3);
  position: sticky; top: 0; z-index: 1;
}

.shop-title {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 28px;
  letter-spacing: 0.2em;
  color: var(--text);
}

.shop-coins {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 24px;
  color: var(--coin);
  text-shadow: 0 0 10px rgba(255,165,0,0.5);
}

.close-btn {
  background: none; border: 1px solid var(--border);
  color: var(--muted); cursor: pointer;
  width: 32px; height: 32px;
  font-size: 16px;
  transition: all 0.2s;
  pointer-events: all;
}

.close-btn:hover { border-color: var(--neon-red); color: var(--neon-red); }

.shop-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
  padding: 20px;
}

.shop-item {
  background: var(--dark3);
  border: 1px solid var(--border);
  padding: 16px;
  cursor: pointer;
  transition: all 0.2s;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  pointer-events: all;
}

.shop-item:hover:not(.locked):not(.owned) {
  border-color: var(--coin);
  background: rgba(255,165,0,0.08);
  transform: translateY(-2px);
}

.shop-item.owned {
  border-color: var(--green);
  background: rgba(57,255,20,0.05);
  cursor: default;
}

.shop-item.locked {
  opacity: 0.5;
  cursor: not-allowed;
}

.shop-item.equipped {
  border-color: var(--cyan);
  background: rgba(0,255,255,0.05);
}

.item-icon { font-size: 36px; margin-bottom: 8px; }

.item-name {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 18px;
  letter-spacing: 0.1em;
  color: var(--text);
}

.item-desc {
  font-size: 11px;
  color: var(--muted);
  font-family: 'Share Tech Mono', monospace;
  margin: 4px 0 8px;
  line-height: 1.4;
}

.item-stats {
  display: flex; flex-direction: column; gap: 2px;
  margin-bottom: 10px;
}

.stat-bar-row {
  display: flex; align-items: center; gap: 6px;
  font-family: 'Share Tech Mono', monospace;
  font-size: 10px;
  color: var(--muted);
}

.stat-bar {
  flex: 1; height: 4px;
  background: var(--dark);
  border: 1px solid var(--border);
  overflow: hidden;
}

.stat-fill {
  height: 100%;
  background: var(--cyan);
  box-shadow: 0 0 4px var(--cyan);
}

.item-price {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 20px;
  color: var(--coin);
}

.item-price.free { color: var(--green); }
.item-price.owned-label { color: var(--green); font-size: 16px; }
.item-price.equipped-label { color: var(--cyan); font-size: 16px; }

/* ── WAVE ANNOUNCEMENT ── */
.wave-announce {
  position: fixed; inset: 0;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  z-index: 60;
  pointer-events: none;
}

.wave-announce.hidden { display: none; }

.wave-text {
  font-family: 'Bebas Neue', sans-serif;
  font-size: clamp(60px, 12vw, 120px);
  color: var(--neon-red);
  text-shadow: 0 0 30px var(--blood2), 0 0 60px var(--blood);
  animation: waveIn 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  letter-spacing: 0.1em;
}

.wave-sub {
  font-family: 'Bebas Neue', sans-serif;
  font-size: clamp(20px, 4vw, 36px);
  color: var(--text);
  letter-spacing: 0.4em;
  animation: waveIn 0.5s 0.1s cubic-bezier(0.175, 0.885, 0.32, 1.275) both;
}

@keyframes waveIn {
  0% { opacity: 0; transform: scale(0.5) translateY(20px); }
  100% { opacity: 1; transform: scale(1) translateY(0); }
}

/* ── GAME OVER ── */
#gameOver, #victoryScreen {
  background: rgba(0,0,0,0.95);
  align-items: center; justify-content: center;
  flex-direction: column;
}

.go-content {
  text-align: center;
  display: flex; flex-direction: column;
  align-items: center; gap: 24px;
}

.go-title {
  font-family: 'Bebas Neue', sans-serif;
  font-size: clamp(60px, 12vw, 120px);
  color: var(--neon-red);
  text-shadow: 0 0 30px var(--blood2);
  animation: titleIn 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.victory-title {
  color: var(--gold);
  text-shadow: 0 0 30px rgba(255,215,0,0.6);
}

.go-sub {
  font-family: 'Rajdhani', sans-serif;
  font-size: 18px;
  color: var(--muted);
  letter-spacing: 0.2em;
}

@keyframes titleIn {
  0% { opacity: 0; transform: scale(2); }
  100% { opacity: 1; transform: scale(1); }
}

.go-stats {
  display: flex; flex-direction: column; gap: 8px;
  min-width: 300px;
}

.stat-row {
  display: flex; justify-content: space-between;
  padding: 8px 16px;
  background: var(--dark3);
  border: 1px solid var(--border);
  font-family: 'Rajdhani', sans-serif;
  font-size: 18px;
  font-weight: 600;
}

.stat-row span:last-child {
  color: var(--gold);
  font-family: 'Share Tech Mono', monospace;
}

.menu-btn {
  padding: 12px 40px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  font-family: 'Bebas Neue', sans-serif;
  font-size: 20px;
  letter-spacing: 0.2em;
  cursor: pointer;
  transition: all 0.2s;
}

.menu-btn:hover {
  border-color: var(--text);
  color: var(--text);
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--dark); }
::-webkit-scrollbar-thumb { background: var(--border); }
::-webkit-scrollbar-thumb:hover { background: var(--blood); }

/* Responsive */
@media (max-width: 600px) {
  .diff-buttons { flex-direction: column; }
  .diff-btn { min-width: 260px; }
  .hud-top { padding: 8px 12px; }
  .health-bar { width: 100px; }
  #minimap { width: 80px; height: 80px; }
}