/* ── Tokens ─────────────────────────────────────────────────────────────── */
:root {
  --bg:          #04060f;
  --surface:     rgba(6, 12, 28, 0.82);
  --border:      rgba(0, 255, 140, 0.18);
  --neon-green:  #00ff8c;
  --neon-magenta:#ff00aa;
  --neon-yellow: #ffe500;
  --neon-blue:   #00c8ff;
  --text-primary:#e8f4f0;
  --text-muted:  rgba(232, 244, 240, 0.45);
  --font-ui:     'Space Grotesk', system-ui, sans-serif;
  --font-mono:   'Space Mono', 'Courier New', monospace;
  --hud-h:       52px;
  --radius:      0; /* Brutalist */
  --transition:  200ms ease;
}

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

html, body {
  width: 100%; height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-ui);
  -webkit-font-smoothing: antialiased;
}

/* ── Webcam (hidden source texture) ─────────────────────────────────────── */
#webcam {
  position: fixed;
  width: 1px; height: 1px;
  opacity: 0;
  pointer-events: none;
}

/* ── Canvas ──────────────────────────────────────────────────────────────── */
#output-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

/* ── Scanlines ───────────────────────────────────────────────────────────── */
#scanlines {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0px,
    transparent 2px,
    rgba(0, 0, 0, 0.07) 2px,
    rgba(0, 0, 0, 0.07) 4px
  );
  z-index: 10;
}

/* ── HUD shared ──────────────────────────────────────────────────────────── */
#hud-header,
#hud-footer {
  position: fixed;
  left: 0; right: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  padding: 0 20px;
  height: var(--hud-h);
  background: var(--surface);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
}

/* ── Header ──────────────────────────────────────────────────────────────── */
#hud-header {
  top: 0;
  border-bottom: 1px solid var(--border);
  justify-content: space-between;
  display: none;
}

#hud-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-icon {
  width: 20px; height: 20px;
  color: var(--neon-green);
  filter: drop-shadow(0 0 6px var(--neon-green));
}

.logo-text {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.18em;
}

.logo-accent {
  color: var(--neon-green);
  text-shadow: 0 0 12px var(--neon-green);
}

#hud-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  text-transform: uppercase;
}

.badge-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
  transition: background var(--transition), box-shadow var(--transition);
  flex-shrink: 0;
}

.badge-dot.active {
  background: var(--neon-green);
  box-shadow: 0 0 8px var(--neon-green), 0 0 16px var(--neon-green);
  animation: pulse-dot 2s ease-in-out infinite;
}

.badge-dot.error { background: #ff4466; box-shadow: 0 0 8px #ff4466; }

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.4; }
}

/* ── Footer ──────────────────────────────────────────────────────────────── */
#hud-footer {
  bottom: 0;
  border-top: 1px solid var(--border);
  gap: 2px;
  justify-content: space-between;
}

.metrics-group {
  display: flex;
  height: 100%;
}

.metric-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0 20px;
  height: 100%;
  border-left: 1px solid var(--border);
  min-width: 80px;
}

.metric-card:first-child { border-left: none; }

.metric-label {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.14em;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 3px;
}

.metric-value {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--neon-green);
  text-shadow: 0 0 10px var(--neon-green);
  transition: color var(--transition), text-shadow var(--transition);
}

#metric-score .metric-value { color: var(--neon-magenta); text-shadow: 0 0 10px var(--neon-magenta); }
#metric-fps      .metric-value { color: var(--neon-blue);    text-shadow: 0 0 10px var(--neon-blue); }

/* ── Tab Navigation ──────────────────────────────────────────────────────── */
#tabs-nav {
  display: flex;
  gap: 8px;
}

.tab-btn {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid transparent;
  padding: 0 12px;
  height: 36px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: all var(--transition);
}

.tab-btn:hover {
  color: var(--text-primary);
  background: rgba(255,255,255,0.05);
}

.tab-btn.active {
  color: var(--bg);
  background: var(--neon-green);
  border-color: var(--neon-green);
  box-shadow: 4px 4px 0px rgba(0, 255, 140, 0.3);
}

/* ── Creator Signature ───────────────────────────────────────────────────── */
.creator-tag {
  position: fixed;
  bottom: 80px;
  right: 20px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: #ffffff;
  opacity: 0.3;
  text-decoration: none;
  z-index: 100;
  transition: all var(--transition);
}

.creator-tag:hover {
  opacity: 1;
  color: var(--neon-green);
  text-shadow: 0 0 8px rgba(0, 255, 140, 0.6);
}

/* ── Init loading overlay ────────────────────────────────────────────────── */
#loading-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(ellipse at center, #070e1e 0%, #04060f 100%);
  transition: opacity 0.6s ease, visibility 0.6s ease;
}

#loading-overlay.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loader-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.loader-title {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.3em;
  color: var(--neon-green);
  text-shadow: 0 0 20px var(--neon-green);
}

.loader-sub {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  min-height: 16px;
}

.loader-rings {
  position: relative;
  width: 90px; height: 90px;
}

.ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid transparent;
  animation: spin linear infinite;
}

.ring-1 { border-top-color: var(--neon-green);   animation-duration: 1.1s; }
.ring-2 { inset: 11px; border-right-color: var(--neon-magenta); animation-duration: 1.7s; animation-direction: reverse; }
.ring-3 { inset: 22px; border-bottom-color: var(--neon-blue);   animation-duration: 2.3s; }

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

.hidden { display: none !important; }