/* ========================================
   REALITY ENGINE — STYLE SYSTEM
   Cyberpunk / Neon / HUD Aesthetic
   ======================================== */

:root {
  --cyan: #00f0ff;
  --cyan-dim: #00f0ff66;
  --cyan-glow: #00f0ff33;
  --magenta: #ff00aa;
  --magenta-dim: #ff00aa66;
  --magenta-glow: #ff00aa22;
  --red: #ff2244;
  --red-glow: #ff224433;
  --green: #00ff88;
  --yellow: #ffee00;
  --dark: #0a0a12;
  --dark-alpha: rgba(10, 10, 18, 0.85);
  --panel: rgba(10, 10, 18, 0.6);
  --panel-border: rgba(0, 240, 255, 0.15);
  --text: #e0e8ff;
  --text-dim: #607090;
  --font-mono: 'Courier New', 'Lucida Console', monospace;
  --font-display: 'Arial Black', 'Helvetica Neue', sans-serif;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
  user-select: none;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #000;
  font-family: var(--font-mono);
  color: var(--text);
  position: fixed;
  top: 0;
  left: 0;
}

/* ---- Camera ---- */
#camera {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
}

/* ---- Game Canvas ---- */
#gameCanvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 10;
  touch-action: none;
}

/* ---- Scan Overlay ---- */
.scan-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 5;
  pointer-events: none;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 240, 255, 0.03) 2px,
    rgba(0, 240, 255, 0.03) 4px
  );
  animation: scanMove 8s linear infinite;
}

.scan-overlay::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  box-shadow: 0 0 30px var(--cyan), 0 0 60px var(--cyan-dim);
  animation: scanLine 3s linear infinite;
}

@keyframes scanMove {
  from { background-position: 0 0; }
  to { background-position: 0 200px; }
}

@keyframes scanLine {
  0% { top: -4px; opacity: 1; }
  100% { top: 100%; opacity: 0.3; }
}

/* ---- Boot Screen ---- */
.boot-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1000;
  background: var(--dark);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}

.boot-screen::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(ellipse at 20% 50%, var(--cyan-glow) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 50%, var(--magenta-glow) 0%, transparent 50%);
  pointer-events: none;
}

.boot-screen::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 1px,
    rgba(255,255,255,0.015) 1px,
    rgba(255,255,255,0.015) 2px
  );
  pointer-events: none;
}

.boot-content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 2rem;
  width: 100%;
  max-width: 480px;
}

.boot-logo {
  margin-bottom: 3rem;
}

.logo-glitch {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 10vw, 5rem);
  font-weight: 900;
  letter-spacing: 0.15em;
  color: var(--text);
  text-shadow: 
    0 0 10px var(--cyan-dim),
    0 0 40px var(--cyan-glow);
  position: relative;
  animation: glitchText 4s infinite;
}

.logo-glitch::before,
.logo-glitch::after {
  content: attr(data-text);
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

.logo-glitch::before {
  color: var(--cyan);
  animation: glitchBefore 4s infinite;
  clip-path: polygon(0 0, 100% 0, 100% 35%, 0 35%);
}

.logo-glitch::after {
  color: var(--magenta);
  animation: glitchAfter 4s infinite;
  clip-path: polygon(0 65%, 100% 65%, 100% 100%, 0 100%);
}

@keyframes glitchText {
  0%, 95%, 100% { transform: none; }
  96% { transform: translateX(-3px) skewX(-1deg); }
  97% { transform: translateX(3px) skewX(1deg); }
  98% { transform: translateX(-1px); }
}

@keyframes glitchBefore {
  0%, 94%, 100% { transform: none; opacity: 0; }
  95% { transform: translateX(-5px); opacity: 0.7; }
  96% { transform: translateX(5px); opacity: 0.7; }
  97% { transform: translateX(-3px); opacity: 0; }
}

@keyframes glitchAfter {
  0%, 93%, 100% { transform: none; opacity: 0; }
  94% { transform: translateX(5px); opacity: 0.7; }
  95% { transform: translateX(-5px); opacity: 0.7; }
  96% { transform: translateX(3px); opacity: 0; }
}

.logo-sub {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  letter-spacing: 0.6em;
  color: var(--cyan);
  margin-top: 0.5rem;
  opacity: 0.7;
}

.logo-sub .ver {
  color: var(--magenta);
  letter-spacing: 0.1em;
  font-size: 0.75rem;
}

.boot-status {
  text-align: left;
  margin-bottom: 2.5rem;
  padding: 0 1rem;
}

.status-line {
  font-size: 0.7rem;
  line-height: 2;
  color: var(--text-dim);
  letter-spacing: 0.05em;
  opacity: 0;
  transform: translateX(-10px);
  transition: all 0.4s ease;
}

.status-line.done {
  opacity: 1;
  transform: translateX(0);
  color: var(--green);
}

.status-line.done::first-letter {
  color: var(--green);
}

/* ---- Buttons ---- */
.start-btn {
  background: transparent;
  border: 1px solid var(--cyan);
  color: var(--cyan);
  padding: 1rem 2.5rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  letter-spacing: 0.3em;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
}

.start-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, var(--cyan-glow), transparent);
  transition: left 0.5s ease;
}

.start-btn:hover::before,
.start-btn:active::before {
  left: 100%;
}

.start-btn:hover,
.start-btn:active {
  background: rgba(0, 240, 255, 0.1);
  box-shadow: 0 0 20px var(--cyan-glow), inset 0 0 20px var(--cyan-glow);
  transform: scale(1.02);
}

.start-btn .btn-icon {
  font-size: 1.1rem;
}

.boot-footer {
  position: absolute;
  bottom: 2rem;
  left: 0;
  width: 100%;
  text-align: center;
  font-size: 0.55rem;
  letter-spacing: 0.4em;
  color: var(--text-dim);
  opacity: 0.4;
}

/* ---- HUD ---- */
.hud {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 100;
  pointer-events: none;
  transition: opacity 0.5s ease;
}

.hud > * {
  pointer-events: auto;
}

.hud-top {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: max(env(safe-area-inset-top, 12px), 12px) 16px 0;
}

.hud-score,
.hud-fps {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  padding: 8px 14px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.hud-score .label,
.hud-fps .label,
.hud-health .label,
.hud-energy .label {
  font-size: 0.55rem;
  letter-spacing: 0.25em;
  color: var(--text-dim);
  margin-bottom: 2px;
}

.hud-score .value {
  font-size: 1.4rem;
  font-weight: bold;
  color: var(--cyan);
  text-shadow: 0 0 10px var(--cyan-dim);
  font-variant-numeric: tabular-nums;
}

.hud-fps .value {
  font-size: 1rem;
  color: var(--green);
  text-shadow: 0 0 8px rgba(0, 255, 136, 0.4);
  font-variant-numeric: tabular-nums;
}

.mode-btn {
  background: var(--panel);
  border: 1px solid var(--magenta-dim);
  color: var(--magenta);
  padding: 8px 18px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.3em;
  cursor: pointer;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: all 0.2s ease;
}

.mode-btn:active {
  background: rgba(255, 0, 170, 0.15);
}

.mode-btn.scan-active {
  border-color: var(--cyan);
  color: var(--cyan);
  box-shadow: 0 0 15px var(--cyan-glow);
}

/* ---- Crosshair ---- */
.crosshair {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
  z-index: 110;
  filter: drop-shadow(0 0 4px var(--cyan-dim));
  transition: transform 0.1s ease;
}

.crosshair.fire {
  transform: translate(-50%, -50%) scale(0.8);
  filter: drop-shadow(0 0 10px var(--cyan));
}

/* ---- Bottom HUD ---- */
.hud-bottom {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  padding: 0 16px max(env(safe-area-inset-bottom, 16px), 16px);
  display: flex;
  gap: 12px;
}

.hud-health,
.hud-energy {
  flex: 1;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  padding: 8px 12px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  gap: 8px;
}

.bar-container {
  flex: 1;
  height: 6px;
  background: rgba(255,255,255,0.05);
  border-radius: 3px;
  overflow: hidden;
}

.bar {
  height: 100%;
  border-radius: 3px;
  transition: width 0.3s ease;
  width: 100%;
}

.bar-health {
  background: linear-gradient(90deg, var(--red), var(--green));
  box-shadow: 0 0 8px var(--green);
}

.bar-energy {
  background: linear-gradient(90deg, var(--magenta), var(--cyan));
  box-shadow: 0 0 8px var(--cyan-dim);
}

.bar-val {
  font-size: 0.7rem;
  font-variant-numeric: tabular-nums;
  min-width: 28px;
  text-align: right;
  color: var(--text);
}

/* ---- Kill Feed ---- */
.kill-feed {
  position: absolute;
  top: 70px;
  right: 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  pointer-events: none;
}

.kill-entry {
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  color: var(--cyan);
  background: var(--panel);
  padding: 4px 10px;
  border-left: 2px solid var(--magenta);
  animation: killSlide 0.3s ease, killFade 2s ease 1s forwards;
  white-space: nowrap;
}

@keyframes killSlide {
  from { transform: translateX(30px); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

@keyframes killFade {
  to { opacity: 0; transform: translateX(20px); }
}

/* ---- Wave Info ---- */
.wave-info {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
  z-index: 120;
  text-align: center;
}

.wave-text {
  font-family: var(--font-display);
  font-size: clamp(2rem, 8vw, 4rem);
  font-weight: 900;
  letter-spacing: 0.2em;
  color: var(--text);
  text-shadow: 
    0 0 20px var(--cyan-dim),
    0 0 60px var(--cyan-glow);
  animation: waveIn 0.5s ease, waveOut 0.5s ease 1.5s forwards;
}

@keyframes waveIn {
  from { transform: scale(2); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

@keyframes waveOut {
  to { transform: scale(0.8); opacity: 0; }
}

/* ---- Damage Flash ---- */
.damage-flash {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 90;
  border: 3px solid transparent;
  transition: border-color 0.1s ease;
}

.damage-flash.active {
  border-color: var(--red);
  box-shadow: inset 0 0 60px var(--red-glow);
  animation: damageShake 0.15s ease;
}

@keyframes damageShake {
  0%, 100% { transform: translate(0); }
  25% { transform: translate(-3px, 2px); }
  50% { transform: translate(3px, -2px); }
  75% { transform: translate(-2px, -1px); }
}

/* ---- Combo ---- */
.combo-display {
  position: absolute;
  top: 40%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 6vw, 3rem);
  font-weight: 900;
  color: var(--yellow);
  text-shadow: 0 0 20px rgba(255, 238, 0, 0.5);
  pointer-events: none;
  z-index: 115;
  animation: comboIn 0.3s ease;
  letter-spacing: 0.1em;
}

@keyframes comboIn {
  from { transform: translate(-50%, -50%) scale(2); opacity: 0; }
  to { transform: translate(-50%, -50%) scale(1); opacity: 1; }
}

/* ---- Game Over ---- */
.game-over {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 2000;
  background: rgba(10, 0, 5, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.go-content {
  text-align: center;
  padding: 2rem;
}

.go-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 8vw, 3.5rem);
  font-weight: 900;
  letter-spacing: 0.15em;
  color: var(--red);
  text-shadow: 0 0 30px var(--red-glow);
  margin-bottom: 2rem;
  animation: glitchText 2s infinite;
  position: relative;
}

.go-title::before,
.go-title::after {
  content: attr(data-text);
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
}

.go-title::before {
  color: var(--cyan);
  animation: glitchBefore 2s infinite;
  clip-path: polygon(0 0, 100% 0, 100% 40%, 0 40%);
}

.go-title::after {
  color: var(--magenta);
  animation: glitchAfter 2s infinite;
  clip-path: polygon(0 60%, 100% 60%, 100% 100%, 0 100%);
}

.go-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 2.5rem;
  max-width: 360px;
  margin-left: auto;
  margin-right: auto;
}

.go-stat {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.go-label {
  font-size: 0.5rem;
  letter-spacing: 0.25em;
  color: var(--text-dim);
}

.go-value {
  font-size: 1.4rem;
  font-weight: bold;
  color: var(--cyan);
  text-shadow: 0 0 10px var(--cyan-dim);
}

/* ---- Utilities ---- */
.hidden {
  display: none !important;
}

/* ---- Noise overlay ---- */
body::after {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 9999;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");
  opacity: 0.4;
}

/* ---- Mobile fixes ---- */
@supports (padding: env(safe-area-inset-top)) {
  .hud-top { padding-top: max(env(safe-area-inset-top), 12px); }
  .hud-bottom { padding-bottom: max(env(safe-area-inset-bottom), 16px); }
}