@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700;900&family=Outfit:wght@300;400;600;800&display=swap');

:root {
  --bg-dark: #07070c;
  --bg-panel: rgba(12, 12, 24, 0.75);
  --color-cyan: #00f0ff;
  --color-magenta: #ff007f;
  --color-yellow: #ffb700;
  --color-green: #39ff14;
  --color-white: #f8f9fa;
  --color-gray: #4d4d60;
  --neon-glow-cyan: 0 0 10px rgba(0, 240, 255, 0.5), 0 0 20px rgba(0, 240, 255, 0.3);
  --neon-glow-magenta: 0 0 10px rgba(255, 0, 127, 0.5), 0 0 20px rgba(255, 0, 127, 0.3);
  --neon-glow-green: 0 0 10px rgba(57, 255, 20, 0.5), 0 0 20px rgba(57, 255, 20, 0.3);
  --font-display: 'Orbitron', sans-serif;
  --font-body: 'Outfit', sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  user-select: none;
}

body {
  background-color: var(--bg-dark);
  color: var(--color-white);
  font-family: var(--font-body);
  overflow: hidden;
  height: 100vh;
  width: 100vw;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

/* Background Cyber Grid */
body::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    linear-gradient(rgba(18, 18, 36, 0.4) 1px, transparent 1px),
    linear-gradient(90deg, rgba(18, 18, 36, 0.4) 1px, transparent 1px);
  background-size: 40px 40px;
  z-index: -1;
  pointer-events: none;
}

/* Base App Wrapper */
#app-container {
  position: relative;
  width: 100vw;
  height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding: 20px;
  overflow: hidden;
}

/* Screen shake effect on high combos */
.shake-light {
  animation: shake 0.15s infinite;
}
.shake-hard {
  animation: shake-heavy 0.15s infinite;
}

@keyframes shake {
  0% { transform: translate(1px, 1px) rotate(0deg); }
  10% { transform: translate(-1px, -2px) rotate(-1deg); }
  20% { transform: translate(-3px, 0px) rotate(1deg); }
  30% { transform: translate(0px, 2px) rotate(0deg); }
  40% { transform: translate(1px, -1px) rotate(1deg); }
  50% { transform: translate(-1px, 2px) rotate(-1deg); }
  60% { transform: translate(-3px, 1px) rotate(0deg); }
  70% { transform: translate(2px, 1px) rotate(-1deg); }
  80% { transform: translate(-1px, -1px) rotate(1deg); }
  90% { transform: translate(2px, 2px) rotate(0deg); }
  100% { transform: translate(1px, -2px) rotate(-1deg); }
}

@keyframes shake-heavy {
  0% { transform: translate(2px, 2px) rotate(0deg); }
  10% { transform: translate(-2px, -3px) rotate(-2deg); }
  20% { transform: translate(-5px, 0px) rotate(2deg); }
  30% { transform: translate(0px, 4px) rotate(0deg); }
  40% { transform: translate(3px, -2px) rotate(2deg); }
  50% { transform: translate(-2px, 4px) rotate(-2deg); }
  60% { transform: translate(-5px, 2px) rotate(0deg); }
  70% { transform: translate(4px, 2px) rotate(-2deg); }
  80% { transform: translate(-2px, -2px) rotate(2deg); }
  90% { transform: translate(4px, 4px) rotate(0deg); }
  100% { transform: translate(2px, -4px) rotate(-2deg); }
}

/* Glassmorphism Panels */
.glass-panel {
  background: var(--bg-panel);
  border: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: 12px;
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.glow-cyan {
  border-color: var(--color-cyan);
  box-shadow: var(--neon-glow-cyan);
}

.glow-magenta {
  border-color: var(--color-magenta);
  box-shadow: var(--neon-glow-magenta);
}

.glow-green {
  border-color: var(--color-green);
  box-shadow: var(--neon-glow-green);
}

/* Game Header / HUD Top */
#hud-header {
  width: 100%;
  max-width: 1200px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 10;
}

.brand-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 24px;
  letter-spacing: 2px;
  background: linear-gradient(90deg, var(--color-cyan), var(--color-magenta));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 30px rgba(0, 240, 255, 0.3);
}

.hud-header-stats {
  display: flex;
  gap: 25px;
}

.score-display {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.score-label {
  font-size: 11px;
  color: var(--color-gray);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.score-val {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 900;
  color: var(--color-yellow);
  text-shadow: 0 0 10px rgba(255, 183, 0, 0.3);
}

/* Main Display: Canvas & Live Stream */
#gameplay-area {
  position: relative;
  width: 100%;
  max-width: 960px;
  aspect-ratio: 16 / 9;
  height: auto;
  max-height: calc(100vh - 200px);
  border-radius: 16px;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: #030307;
  border: 2px solid rgba(255, 255, 255, 0.05);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
  z-index: 5;
}

#webcam-video {
  position: absolute;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scaleX(-1); /* Mirror camera */
  opacity: 0; /* Keep hidden, we render to canvas instead */
  pointer-events: none;
}

#canvas-display {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 6;
}

/* UI Overlay directly over the camera feed */
#canvas-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 7;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 20px;
}

/* Dynamic Hand Status Indicators */
.hand-status-container {
  position: absolute;
  top: 25px;
  left: 25px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
  z-index: 10;
}

.hand-status-chip {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(12, 12, 24, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 6px 14px;
  border-radius: 20px;
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  font-family: var(--font-display);
  font-size: 11px;
  letter-spacing: 1px;
  color: var(--color-white);
  opacity: 0.6;
  transition: all 0.3s ease;
}

.hand-status-chip .chip-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-gray);
  box-shadow: none;
  transition: all 0.3s ease;
}

.hand-status-chip.detected {
  border-color: var(--color-cyan);
  box-shadow: 0 0 10px rgba(0, 240, 255, 0.15);
  opacity: 1;
}

.hand-status-chip.detected .chip-dot {
  background: var(--color-green);
  box-shadow: var(--neon-glow-green);
  animation: pulse-dot 1.5s infinite alternate;
}

@keyframes pulse-dot {
  0% { transform: scale(0.9); opacity: 0.7; }
  100% { transform: scale(1.15); opacity: 1; }
}

/* Game Screens (Start Screen / End Screen Overlay) */
.game-overlay-screen {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(5, 5, 10, 0.95);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  z-index: 20;
  display: flex;
  flex-direction: column;
  justify-content: flex-start; /* Changed from center to allow top-aligned scrolling */
  align-items: center;
  text-align: center;
  padding: 24px 30px; /* More compact padding */
  overflow-y: auto; /* Scrollable if elements exceed height */
  scrollbar-width: thin;
  scrollbar-color: var(--color-cyan) rgba(12, 12, 24, 0.5);
  transition: opacity 0.4s ease, visibility 0.4s;
}

/* Scrollable flexbox centering trick: centers content when fits, starts from top when overflows */
.game-overlay-screen::before,
.game-overlay-screen::after {
  content: "";
  margin: auto;
}

/* Custom Cyberpunk Scrollbar for screens */
.game-overlay-screen::-webkit-scrollbar {
  width: 8px;
}
.game-overlay-screen::-webkit-scrollbar-track {
  background: rgba(12, 12, 24, 0.5);
  border-radius: 4px;
}
.game-overlay-screen::-webkit-scrollbar-thumb {
  background: linear-gradient(to bottom, var(--color-cyan), var(--color-magenta));
  border-radius: 4px;
  border: 1px solid rgba(0, 0, 0, 0.5);
}
.game-overlay-screen::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(to bottom, #00d8ff, #ff0066);
}

.game-overlay-screen.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

/* Prevent flex layout from squeezing overlay child elements */
.game-overlay-screen > * {
  flex-shrink: 0;
}

/* Buttons */
.btn-cyber {
  background: linear-gradient(135deg, var(--color-cyan) 0%, #00a8ff 100%);
  border: none;
  color: #030307;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 18px;
  letter-spacing: 2px;
  padding: 14px 36px;
  border-radius: 8px;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(0, 240, 255, 0.4);
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
  text-transform: uppercase;
}

.btn-cyber::before {
  content: '';
  position: absolute;
  top: 0;
  left: -50%;
  width: 200%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.4),
    transparent
  );
  transform: skewX(-30deg);
  transition: 0.75s;
}

.btn-cyber:hover::before {
  left: 120%;
}

.btn-cyber:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 30px rgba(0, 240, 255, 0.6);
  filter: brightness(1.1);
}

.btn-cyber:active {
  transform: translateY(1px);
}

.btn-cyber.secondary {
  background: transparent;
  border: 1px solid var(--color-magenta);
  color: var(--color-magenta);
  box-shadow: 0 0 15px rgba(255, 0, 127, 0.1);
}

.btn-cyber.secondary:hover {
  background: rgba(255, 0, 127, 0.1);
  box-shadow: 0 0 25px rgba(255, 0, 127, 0.3);
}

.game-overlay-screen .btn-cyber {
  width: 100%;
  max-width: 280px;
  text-align: center;
}

#leaderboard-input-zone .btn-cyber {
  width: auto;
  max-width: none;
}

/* Mode Select */
.mode-toggle-container {
  display: flex;
  gap: 15px;
  margin: 25px 0;
}

.mode-btn {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--color-white);
  padding: 8px 18px;
  border-radius: 6px;
  font-family: var(--font-display);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.3s;
}

.mode-btn.active {
  background: rgba(0, 240, 255, 0.1);
  border-color: var(--color-cyan);
  color: var(--color-cyan);
  box-shadow: 0 0 10px rgba(0, 240, 255, 0.2);
  text-shadow: var(--neon-glow-cyan);
}

/* Loading/Status Elements */
.loading-box {
  margin: 20px 0;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid rgba(0, 240, 255, 0.1);
  border-radius: 50%;
  border-top-color: var(--color-cyan);
  animation: spin 1s ease-in-out infinite;
  margin-bottom: 12px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Central Countdown Timer overlay */
#countdown-overlay {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 120px;
  color: var(--color-magenta);
  text-shadow: var(--neon-glow-magenta);
  z-index: 10;
  pointer-events: none;
  animation: zoom-out-fade 1s ease-out infinite;
  display: none;
}

@keyframes zoom-out-fade {
  0% { transform: translate(-50%, -50%) scale(1.5); opacity: 1; }
  100% { transform: translate(-50%, -50%) scale(0.8); opacity: 0; }
}

/* Progress HUD (RPS, Speedometer & Timer) */
.game-stats-overlay {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  width: 100%;
}

.hud-progress-card {
  padding: 10px 16px;
  min-width: 160px;
}

.hud-stat-num {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 26px;
}

.hud-stat-label {
  font-size: 10px;
  color: var(--color-gray);
  letter-spacing: 1px;
  text-transform: uppercase;
}

/* Combo Indicator Overlay */
#combo-container {
  position: absolute;
  top: 25px;
  right: 25px;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  pointer-events: none;
  transform: scale(0.8);
  opacity: 0;
  transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

#combo-container.active {
  transform: scale(1);
  opacity: 1;
}

#combo-title {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 2px;
  color: var(--color-magenta);
  text-shadow: var(--neon-glow-magenta);
}

#combo-value {
  font-family: var(--font-display);
  font-size: 64px;
  font-weight: 900;
  line-height: 1;
  color: var(--color-cyan);
  text-shadow: var(--neon-glow-cyan);
  animation: pulse-combo 0.2s ease-out;
}

@keyframes pulse-combo {
  0% { transform: scale(1.3); }
  100% { transform: scale(1); }
}

#combo-level {
  font-size: 12px;
  font-weight: 700;
  color: var(--color-green);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* Footer / Controls */
#hud-footer {
  width: 100%;
  max-width: 1200px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 10;
}

.key-tips {
  display: flex;
  gap: 15px;
  color: var(--color-gray);
  font-size: 12px;
}

.key-badge {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  padding: 2px 6px;
  color: var(--color-white);
  font-family: var(--font-display);
  font-weight: 700;
}

.controls-group {
  display: flex;
  gap: 15px;
}

.icon-btn {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  color: var(--color-white);
  transition: all 0.2s;
}

.icon-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--color-cyan);
  color: var(--color-cyan);
  box-shadow: 0 0 10px rgba(0, 240, 255, 0.2);
}

/* Scoreboard/Leaderboard Styling */
.leaderboard-container {
  width: 100%;
  max-width: 400px;
  margin: 12px 0;
}

.leaderboard-title {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-gray);
  letter-spacing: 1px;
  margin-bottom: 10px;
  text-align: left;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding-bottom: 5px;
}

.leaderboard-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.leaderboard-item {
  display: flex;
  justify-content: space-between;
  padding: 8px 12px;
  background: rgba(255, 255, 255, 0.02);
  border-radius: 6px;
  font-family: var(--font-display);
  font-size: 13px;
}

.leaderboard-item.highlight {
  background: rgba(57, 255, 20, 0.06);
  border: 1px solid rgba(57, 255, 20, 0.2);
  color: var(--color-green);
  font-weight: 700;
}

.rank-num {
  color: var(--color-cyan);
  margin-right: 10px;
}

/* Calibration/Overlay instructions */
.setup-instructions {
  max-width: 500px;
  margin-bottom: 30px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.6;
}

.setup-instructions strong {
  color: var(--color-cyan);
}

.game-title-giant {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 42px;
  letter-spacing: 3px;
  background: linear-gradient(135deg, var(--color-cyan), var(--color-magenta));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 10px;
  text-transform: uppercase;
}

/* Keyboard fallback mode visual helper */
#keyboard-fallback-helper {
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 10px 20px;
  border-radius: 8px;
  display: none;
  align-items: center;
  gap: 15px;
  font-size: 13px;
  pointer-events: none;
  z-index: 10;
}

#keyboard-fallback-helper .key-light {
  width: 32px;
  height: 32px;
  border: 2px solid var(--color-cyan);
  background: rgba(0, 240, 255, 0.1);
  color: var(--color-cyan);
  font-family: var(--font-display);
  font-weight: 900;
  display: flex;
  justify-content: center;
  align-items: center;
  border-radius: 6px;
  transition: all 0.15s;
}

#keyboard-fallback-helper .key-light.pressed {
  background: var(--color-cyan);
  color: #000;
  box-shadow: var(--neon-glow-cyan);
  transform: scale(0.92);
}

/* Screen state styles */
.text-cyan { color: var(--color-cyan) !important; }
.text-magenta { color: var(--color-magenta) !important; }
.text-yellow { color: var(--color-yellow) !important; }
.text-green { color: var(--color-green) !important; }
.text-white { color: var(--color-white) !important; }

/* Subtitle under victory screens */
.game-over-summary {
  font-family: var(--font-display);
  font-size: 24px;
  color: var(--color-yellow);
  margin-bottom: 12px;
}

/* Responsive adjustments for mobile and small screens */
@media (max-width: 640px) {
  #hud-header {
    flex-direction: column;
    gap: 10px;
    align-items: center;
  }
  .hud-header-stats {
    gap: 15px;
  }
  .score-val {
    font-size: 24px;
  }
  .brand-title {
    font-size: 20px;
  }
  #hud-footer {
    flex-direction: column;
    gap: 10px;
    align-items: center;
    text-align: center;
  }
  .key-tips {
    font-size: 11px;
    text-align: center;
  }
}

@media (max-height: 600px), (max-width: 480px) {
  .game-title-giant {
    font-size: 28px;
    margin-bottom: 6px;
  }
  .game-over-summary {
    font-size: 18px;
    margin-bottom: 10px;
  }
  .btn-cyber {
    font-size: 15px;
    padding: 10px 24px;
  }
  .game-overlay-screen {
    padding: 16px 20px;
  }
  .setup-instructions {
    font-size: 12px;
    margin-bottom: 15px;
    line-height: 1.4;
  }
  .mode-toggle-container {
    margin: 12px 0;
  }
}

/* Screen Reader / SEO Only (Visually Hidden) */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}