:root {
  color-scheme: dark;
  --bg: #0b0f14;
  --bg-gradient: radial-gradient(circle at 50% 0%, #1a2332 0%, #0b0f14 80%);
  --ink: #f0f4f8;
  --muted: #8a99ad;
  --panel: rgba(18, 24, 34, 0.75);
  --panel-border: rgba(255, 255, 255, 0.12);
  --glass-glow: rgba(0, 230, 118, 0.15);
  --accent-green: #00e676;
  --accent-cyan: #00e5ff;
  --accent-pink: #ff4081;
  --danger: #ff5252;
  --sky-day: #f7f9fa;
  --ground: #535353;
  --font-arcade: "Press Start 2P", monospace;
  --font-body: "Outfit", system-ui, -apple-system, sans-serif;
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.5);
  --glow-green: 0 0 15px rgba(0, 230, 118, 0.4);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg-gradient);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* Glassmorphism Shell Layout */
.shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 24px;
  margin: 0 auto;
  max-width: 1360px;
  min-height: 100vh;
  padding: 24px;
}

.game-area,
.tracker {
  align-self: center;
}

.game-area {
  background: var(--panel);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--panel-border);
  border-radius: 20px;
  box-shadow: var(--shadow-lg);
  padding: 24px;
}

/* Header & Topbar */
.topbar {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: space-between;
  margin-bottom: 20px;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.badge {
  align-self: flex-start;
  background: rgba(0, 230, 118, 0.15);
  border: 1px solid rgba(0, 230, 118, 0.3);
  border-radius: 20px;
  color: var(--accent-green);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 1px;
  padding: 4px 10px;
  text-transform: uppercase;
}

.badge.neon-green {
  box-shadow: 0 0 10px rgba(0, 230, 118, 0.2);
}

.badge.is-online {
  background: rgba(0, 230, 118, 0.25);
  color: var(--accent-green);
}

.badge.is-offline {
  background: rgba(138, 153, 173, 0.15);
  border-color: rgba(138, 153, 173, 0.3);
  color: var(--muted);
}

h1 {
  font-family: var(--font-arcade);
  font-size: clamp(1.1rem, 2vw, 1.6rem);
  letter-spacing: -0.5px;
  line-height: 1.3;
  margin: 0;
  text-shadow: 0 0 20px rgba(255, 255, 255, 0.15);
}

h1 span {
  color: var(--accent-green);
  display: block;
  font-size: 0.7em;
  margin-top: 4px;
}

.top-controls {
  align-items: center;
  display: flex;
  gap: 16px;
}

.icon-btn {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  color: var(--ink);
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 700;
  padding: 10px 16px;
  transition: all 0.2s ease;
}

.icon-btn:hover {
  background: rgba(255, 255, 255, 0.16);
  transform: translateY(-2px);
}

.scoreboard {
  display: flex;
  gap: 12px;
}

.score-card {
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  min-width: 110px;
  padding: 10px 14px;
  text-align: right;
}

.score-card .label {
  color: var(--muted);
  display: block;
  font-family: var(--font-arcade);
  font-size: 0.55rem;
  margin-bottom: 6px;
}

.score-card strong {
  color: var(--ink);
  display: block;
  font-family: var(--font-arcade);
  font-size: 1.1rem;
  letter-spacing: 2px;
}

.score-card.highlight strong {
  color: var(--accent-cyan);
  text-shadow: 0 0 10px rgba(0, 229, 255, 0.4);
}

/* Canvas Area */
.canvas-container {
  border-radius: 16px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
  overflow: hidden;
  position: relative;

}

#gameCanvas {
  aspect-ratio: 3 / 1;
  background: #f7f7f7;
  display: block;
  width: 100%;
}

.touch-overlay {
  display: none;
  inset: 0;
  position: absolute;
  z-index: 10;
}

@media (max-width: 768px) {
  .touch-overlay {
    display: flex;
    flex-direction: column;
  }
}

.touch-zone {
  align-items: center;
  color: rgba(255, 255, 255, 0.5);
  display: flex;
  flex: 1;
  font-family: var(--font-arcade);
  font-size: 0.8rem;
  justify-content: center;
  user-select: none;

}

#touchJump {
  background: rgba(0, 230, 118, 0.05);
  border-bottom: 1px dashed rgba(255, 255, 255, 0.15);
}

#touchDuck {
  background: rgba(0, 229, 255, 0.05);
}

/* Controls Bar */
.controls {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

button.btn-primary,
button.btn-accent,
button.btn-secondary {
  border: 0;
  border-radius: 12px;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  min-height: 48px;
  padding: 0 20px;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-primary {
  background: linear-gradient(135deg, #00e676, #00b0ff);
  box-shadow: 0 4px 16px rgba(0, 230, 118, 0.35);
  color: #05140b;
}

.btn-primary:hover {
  box-shadow: 0 6px 20px rgba(0, 230, 118, 0.5);
  transform: translateY(-2px);
}

.btn-accent {
  background: linear-gradient(135deg, #7c4dff, #651fff);
  box-shadow: 0 4px 16px rgba(124, 77, 255, 0.35);
  color: #ffffff;
}

.btn-accent:hover {
  box-shadow: 0 6px 20px rgba(124, 77, 255, 0.5);
  transform: translateY(-2px);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--panel-border);
  color: var(--ink);
}

.btn-secondary:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.16);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.4;
}

.status {
  align-items: center;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  color: var(--muted);
  display: flex;
  flex: 1 1 260px;
  font-size: 0.9rem;
  gap: 10px;
  min-height: 48px;
  padding: 8px 16px;
}

.status-dot {
  background: var(--muted);
  border-radius: 50%;
  flex-shrink: 0;
  height: 10px;
  width: 10px;
}

.status-dot.active {
  animation: pulse-green 1.5s infinite;
  background: var(--accent-green);
  box-shadow: 0 0 8px var(--accent-green);
}

@keyframes pulse-green {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.25); opacity: 0.7; }
}

/* Sidebar Body Tracker */
.tracker {
  background: var(--panel);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--panel-border);
  border-radius: 20px;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 20px;
}

.tracker-header {
  align-items: center;
  display: flex;
  justify-content: space-between;
}

.tracker-header h3 {
  font-family: var(--font-arcade);
  font-size: 0.75rem;
  letter-spacing: 0.5px;
  margin: 0;
}

.camera-frame {
  aspect-ratio: 4 / 3;
  background: #0f151d;
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.8);
  overflow: hidden;
  position: relative;
}

#camera,
#poseCanvas {
  height: 100%;
  inset: 0;
  object-fit: cover;
  position: absolute;
  transform: scaleX(-1);
  width: 100%;
}

#poseCanvas {
  z-index: 2;
}

.camera-hint {
  align-items: center;
  background: rgba(11, 15, 20, 0.85);
  color: var(--ink);
  display: flex;
  flex-direction: column;
  font-size: 0.9rem;
  font-weight: 600;
  gap: 10px;
  inset: 0;
  justify-content: center;
  padding: 24px;
  position: absolute;
  text-align: center;
  z-index: 3;
}

.camera-hint .hint-icon {
  font-size: 2.2rem;
}

.camera-hint.is-hidden {
  display: none;
}

.move-grid {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.move {
  align-items: center;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  display: flex;
  gap: 10px;
  padding: 12px;
  transition: all 0.2s ease;
}

.move-icon {
  font-size: 1.5rem;
}

.move-info strong {
  color: var(--ink);
  display: block;
  font-size: 0.85rem;
}

.move-info span {
  color: var(--muted);
  display: block;
  font-size: 0.75rem;
  line-height: 1.2;
  margin-top: 2px;
}

.move.is-active {
  background: rgba(0, 230, 118, 0.15);
  border-color: var(--accent-green);
  box-shadow: 0 0 15px rgba(0, 230, 118, 0.25);
}

.move.is-active .move-info strong {
  color: var(--accent-green);
}

.guide-box {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 12px 14px;
}

.guide-box p {
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.4;
  margin: 0;
}

/* Responsive Media Queries */
@media (max-width: 1024px) {
  .shell {
    grid-template-columns: 1fr;
  }

  .tracker {
    grid-template-columns: minmax(260px, 360px) 1fr;

  }
}

@media (max-width: 640px) {
  .shell {
    padding: 12px;
  }

  .game-area,
  .tracker {
    padding: 16px;
  }

  .topbar {
    flex-direction: column;
    align-items: stretch;
  }

  .top-controls {
    justify-content: space-between;
  }

  .tracker {
    grid-template-columns: 1fr;
  }
}