/* =========================================
   MID AIR — Gesture Drawing App
   Dark / Cyberpunk / Glassmorphic aesthetic
   ========================================= */

:root {
  --accent:       #00FFFF;
  --accent2:      #FF00FF;
  --bg:           #080C12;
  --glass-bg:     rgba(4, 8, 16, 0.72);
  --glass-border: rgba(0, 255, 255, 0.18);
  --glass-blur:   blur(18px);
  --text:         #E0F0FF;
  --text-muted:   rgba(180, 210, 255, 0.45);
  --neon-glow:    0 0 8px var(--accent), 0 0 24px var(--accent);
  --font-display: 'Orbitron', monospace;
  --font-mono:    'Space Mono', monospace;
  --sidebar-w:    90px;
  --topbar-h:     56px;
  --bottom-h:     64px;
}

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

html, body {
  width: 100%; height: 100%;
  overflow: hidden;
  background: #000;
  color: var(--text);
  font-family: var(--font-mono);
  user-select: none;
}

/* ── Video (hidden behind canvas) ── */
#webcam {
  position: fixed; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  transform: scaleX(-1);
  opacity: 1;
  pointer-events: none;
  z-index: 0;
}

/* ── Drawing canvas ── */
#drawCanvas {
  position: fixed; inset: 0;
  width: 100%; height: 100%;
  z-index: 1;
  cursor: none;
}

/* ── Finger cursor dot ── */
#fingerCursor {
  position: fixed;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: var(--neon-glow);
  pointer-events: none;
  z-index: 50;
  transform: translate(-50%, -50%);
  transition: background 0.2s, width 0.15s, height 0.15s;
  display: none;
}
#fingerCursor.erase-mode {
  background: transparent;
  border: 2px solid #FF4444;
  box-shadow: 0 0 12px #FF4444, 0 0 30px #FF4444;
  width: 60px; height: 60px;
}
#fingerCursor.grab-mode {
  background: var(--accent2);
  box-shadow: 0 0 8px var(--accent2), 0 0 24px var(--accent2);
  width: 14px; height: 14px;
}

/* ── UI Overlay ── */
#ui-overlay {
  position: fixed; inset: 0;
  z-index: 10;
  pointer-events: none;
}
#ui-overlay > * { pointer-events: auto; }

/* ── TOP BAR ── */
#topbar {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px 0 calc(var(--sidebar-w) + 20px);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-border);
}

.logo {
  display: flex; align-items: baseline; gap: 6px;
}
.logo-mid {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.5rem;
  letter-spacing: 0.12em;
  color: var(--accent);
  text-shadow: var(--neon-glow);
}
.logo-air {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.5rem;
  letter-spacing: 0.12em;
  color: var(--accent2);
  text-shadow: 0 0 8px var(--accent2), 0 0 24px var(--accent2);
}
.logo-tag {
  font-size: 0.6rem;
  color: var(--text-muted);
  letter-spacing: 0.25em;
  text-transform: uppercase;
  margin-left: 4px;
}

#status-badge {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  color: var(--text-muted);
  background: rgba(0,255,255,0.05);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 4px 14px;
}
.status-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #444;
  transition: background 0.4s, box-shadow 0.4s;
}
.status-dot.ready {
  background: #00FF88;
  box-shadow: 0 0 6px #00FF88, 0 0 16px #00FF88;
  animation: pulse-dot 2s infinite;
}
.status-dot.loading { background: #FFAA00; box-shadow: 0 0 8px #FFAA00; }
.status-dot.error   { background: #FF4444; box-shadow: 0 0 8px #FF4444; }

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

/* ── LEFT SIDEBAR ── */
#sidebar {
  position: absolute;
  top: var(--topbar-h);
  left: 0;
  bottom: var(--bottom-h);
  width: var(--sidebar-w);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  padding: 20px 8px;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-right: 1px solid var(--glass-border);
  overflow-y: auto;
  overflow-x: hidden;
}

.sidebar-section {
  display: flex; flex-direction: column;
  align-items: center; gap: 8px;
  width: 100%;
}

.sidebar-label {
  font-family: var(--font-display);
  font-size: 0.5rem;
  letter-spacing: 0.22em;
  color: var(--text-muted);
  text-align: center;
}

/* Color Palette */
#colorPalette {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  width: 100%;
}

.color-btn {
  width: 100%; aspect-ratio: 1;
  border-radius: 6px;
  border: 2px solid transparent;
  background: var(--c);
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s, border-color 0.15s;
  box-shadow: 0 0 6px color-mix(in srgb, var(--c) 60%, transparent);
}
.color-btn:hover {
  transform: scale(1.12);
  box-shadow: 0 0 14px var(--c), 0 0 28px color-mix(in srgb, var(--c) 40%, transparent);
}
.color-btn.active {
  border-color: #fff;
  box-shadow: 0 0 10px var(--c), 0 0 22px var(--c);
  transform: scale(1.08);
}

/* Brush Sizes */
.brush-sizes {
  display: flex; flex-direction: column;
  align-items: center; gap: 4px; width: 100%;
}
.brush-btn {
  width: 44px; height: 32px;
  background: rgba(0,255,255,0.06);
  border: 1px solid var(--glass-border);
  border-radius: 6px;
  color: var(--text);
  cursor: pointer;
  font-size: 1rem;
  display: flex; align-items: center; justify-content: center;
  transition: background 0.15s, border-color 0.15s, box-shadow 0.15s;
}
.brush-btn:hover { background: rgba(0,255,255,0.12); }
.brush-btn.active {
  background: rgba(0,255,255,0.18);
  border-color: var(--accent);
  box-shadow: var(--neon-glow);
  color: var(--accent);
}

/* Glow Toggle */
.glow-toggle-row {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.55rem; letter-spacing: 0.1em; color: var(--text-muted);
}
.toggle-switch { position: relative; display: inline-block; width: 36px; height: 18px; }
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  position: absolute; inset: 0;
  background: rgba(255,255,255,0.1);
  border-radius: 18px;
  border: 1px solid var(--glass-border);
  cursor: pointer;
  transition: background 0.2s;
}
.toggle-slider::before {
  content: '';
  position: absolute;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--text-muted);
  top: 2px; left: 2px;
  transition: transform 0.2s, background 0.2s, box-shadow 0.2s;
}
.toggle-switch input:checked + .toggle-slider { background: rgba(0,255,255,0.2); }
.toggle-switch input:checked + .toggle-slider::before {
  transform: translateX(18px);
  background: var(--accent);
  box-shadow: var(--neon-glow);
}

/* Action Buttons */
.action-btn {
  width: 100%; padding: 8px 4px;
  border-radius: 8px;
  border: 1px solid var(--glass-border);
  font-family: var(--font-display);
  font-size: 0.6rem;
  letter-spacing: 0.18em;
  cursor: pointer;
  transition: all 0.2s;
}
.clear-btn {
  background: rgba(255,68,68,0.1);
  color: #FF4444;
  border-color: rgba(255,68,68,0.3);
}
.clear-btn:hover {
  background: rgba(255,68,68,0.25);
  box-shadow: 0 0 12px rgba(255,68,68,0.4);
}
.screenshot-btn {
  background: rgba(0,255,136,0.1);
  color: #00FF88;
  border-color: rgba(0,255,136,0.3);
  margin-top: 4px;
}
.screenshot-btn:hover {
  background: rgba(0,255,136,0.22);
  box-shadow: 0 0 12px rgba(0,255,136,0.4);
}

/* ── BOTTOM BAR ── */
#bottomBar {
  position: absolute;
  bottom: 0; left: var(--sidebar-w); right: 0;
  height: var(--bottom-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-top: 1px solid var(--glass-border);
  gap: 16px;
}

.gesture-indicators {
  display: flex; gap: 10px;
}
.gesture-chip {
  display: flex; align-items: center; gap: 6px;
  padding: 5px 12px;
  border-radius: 20px;
  border: 1px solid var(--glass-border);
  background: rgba(255,255,255,0.04);
  font-size: 0.6rem;
  letter-spacing: 0.14em;
  color: var(--text-muted);
  transition: all 0.25s;
}
.gesture-chip .chip-icon { font-size: 0.85rem; }

.gesture-chip.active-draw {
  border-color: var(--accent);
  background: rgba(0,255,255,0.12);
  color: var(--accent);
  box-shadow: var(--neon-glow);
}
.gesture-chip.active-erase {
  border-color: #FF4444;
  background: rgba(255,68,68,0.12);
  color: #FF4444;
  box-shadow: 0 0 8px #FF4444, 0 0 20px rgba(255,68,68,0.4);
}
.gesture-chip.active-grab {
  border-color: var(--accent2);
  background: rgba(255,0,255,0.12);
  color: var(--accent2);
  box-shadow: 0 0 8px var(--accent2), 0 0 20px rgba(255,0,255,0.4);
}

#currentAction {
  font-family: var(--font-display);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  display: flex; gap: 10px; align-items: center;
}
.action-label { color: var(--text-muted); }
#currentState {
  color: var(--accent);
  text-shadow: var(--neon-glow);
  min-width: 60px;
}

/* ── LOADING SCREEN ── */
#loadingScreen {
  position: fixed; inset: 0;
  z-index: 100;
  display: flex; align-items: center; justify-content: center;
  background: radial-gradient(ellipse at center, #0d1520 0%, #000 70%);
}

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

.loader-logo {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 4rem;
  letter-spacing: 0.2em;
  animation: flicker 3s infinite;
}
.loader-logo span:first-child { color: var(--accent); text-shadow: var(--neon-glow); }
.air-accent { color: var(--accent2); text-shadow: 0 0 12px var(--accent2), 0 0 30px var(--accent2); }

@keyframes flicker {
  0%, 95%, 100% { opacity: 1; }
  96% { opacity: 0.7; }
  97% { opacity: 1; }
  98% { opacity: 0.5; }
  99% { opacity: 1; }
}

.loader-bar-wrap {
  width: 260px; height: 3px;
  background: rgba(255,255,255,0.08);
  border-radius: 3px;
  overflow: hidden;
}
#loaderBar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  border-radius: 3px;
  transition: width 0.4s ease;
  box-shadow: 0 0 8px var(--accent);
}

#loaderMsg {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--text-muted);
}
.loader-hint {
  font-size: 0.6rem;
  color: rgba(180,210,255,0.25);
  letter-spacing: 0.12em;
}

/* ── Scan-line overlay texture ── */
body::after {
  content: '';
  position: fixed; inset: 0;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0px,
    transparent 2px,
    rgba(0,0,0,0.04) 2px,
    rgba(0,0,0,0.04) 4px
  );
  pointer-events: none;
  z-index: 200;
}

/* ── Scrollbar in sidebar ── */
#sidebar::-webkit-scrollbar { width: 3px; }
#sidebar::-webkit-scrollbar-track { background: transparent; }
#sidebar::-webkit-scrollbar-thumb { background: var(--glass-border); border-radius: 3px; }