@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  /* Liquid Glass Variables - Monochrome Theme */
  --liquid-bg: rgba(255, 255, 255, 0.08);
  --liquid-bg-hover: rgba(255, 255, 255, 0.15);
  --glass-text: #ffffff;
  
  /* Primary replaced with Light Gray/Slate */
  --liquid-primary: #cbd5e1;   
  --liquid-primary-dim: rgba(203, 213, 225, 0.4);
  
  /* Danger replaced with Mid-Gray */
  --liquid-danger: #64748b;
  
  /* OK/Success replaced with Off-White/Pale Gray */
  --liquid-ok: #f1f5f9;
  --liquid-ok-dim: rgba(241, 245, 249, 0.35);
  
  --sans: 'Inter', sans-serif;
  --gallery-width: 280px;
  
  /* Glassmorphism settings */
  --glass-blur: blur(24px) saturate(150%);
  --glass-border: 1px solid rgba(255, 255, 255, 0.15);
  --glass-highlight: inset 0 1px 1px rgba(255, 255, 255, 0.3);
  --glass-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
  --glass-radius: 24px;
}

* { 
  box-sizing: border-box; 
}

html, body {
  margin: 0; padding: 0;
  width: 100vw; height: 100vh;
  /* Animated liquid gradient background - Grayscale tones */
  background: linear-gradient(135deg, #0f172a, #334155, #1e293b, #0f172a);
  background-size: 400% 400%;
  animation: liquidBg 15s ease infinite;
  overflow: hidden;
  font-family: var(--sans);
  color: var(--glass-text);
}

@keyframes liquidBg {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

#app {
  display: flex;
  width: 100vw;
  height: 100vh;
  padding: 16px;
  gap: 16px;
}

#stage {
  position: relative;
  flex: 1 1 auto;
  height: 100%;
  background: rgba(0, 0, 0, 0.4);
  border-radius: var(--glass-radius);
  overflow: hidden;
  border: var(--glass-border);
  box-shadow: var(--glass-shadow);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
}

video { display: none; }

canvas#sceneCanvas {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  display: block;
  border-radius: var(--glass-radius);
}

/* Floating HUD */
.hud-top {
  position: absolute;
  top: 20px; left: 20px; right: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background-color: var(--liquid-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  border-radius: 50px;
  box-shadow: var(--glass-shadow);
  pointer-events: none;
  z-index: 5;
}

.brand {
  font-family: var(--sans);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: black;
  display: flex;
  align-items: baseline;
  gap: 8px;
  text-shadow: 0 0 10px var(--liquid-primary-dim);
}

.brand small {
  color: var(--glass-text);
  opacity: 0.7;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-shadow: none;
}

.status-pill {
  font-family: var(--sans);
  font-weight: 500;
  font-size: 12px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 8px 16px;
  border-radius: 30px;
  border: var(--glass-border);
  background: rgba(255, 255, 255, 0.1);
  box-shadow: var(--glass-highlight);
  display: flex;
  align-items: center;
  gap: 10px;
}

.status-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: #ff4d4d; /* DIUBAH: Merah untuk indikator Looking for hand */
  box-shadow: 0 0 10px #ff4d4d;
  transition: all 0.3s ease;
}

.status-dot.live { background: #2ecc71; box-shadow: 0 0 10px #2ecc71; } /* DIUBAH: Hijau untuk Hand tracked */
.status-dot.armed { background: var(--liquid-primary); box-shadow: 0 0 12px var(--liquid-primary); }
.status-dot.solved { background: var(--liquid-ok); box-shadow: 0 0 15px var(--liquid-ok); }

.progress-badge {
  position: absolute;
  top: 90px;
  right: 20px;
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 10px 18px;
  border-radius: 30px;
  border: var(--glass-border);
  background: var(--liquid-bg);
  box-shadow: var(--glass-shadow), var(--glass-highlight);
  backdrop-filter: var(--glass-blur);
  color: var(--liquid-primary);
  z-index: 5;
  opacity: 0;
  transform: translateY(-10px);
  transition: all 0.4s cubic-bezier(0.2, 0.8, 0.3, 1.1);
  pointer-events: none;
}

.progress-badge.visible { opacity: 1; transform: translateY(0); }

.progress-badge.solved {
  border-color: var(--liquid-ok-dim);
  color: var(--liquid-ok);
  text-shadow: 0 0 8px var(--liquid-ok-dim);
}

#loadingOverlay {
  position: absolute; inset: 0;
  background-color: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(30px) saturate(200%);
  -webkit-backdrop-filter: blur(30px) saturate(200%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  z-index: 20;
  transition: opacity 0.5s ease;
}

#loadingOverlay.hidden { opacity: 0; pointer-events: none; }

.loader-text {
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--liquid-primary);
  text-align: center;
  text-shadow: 0 0 10px var(--liquid-primary-dim);
}

.loader-bar {
  width: 240px; height: 4px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  overflow: hidden;
}

.loader-bar::after {
  content: '';
  display: block;
  width: 40%; height: 100%;
  background: linear-gradient(90deg, transparent, var(--liquid-primary), transparent);
  box-shadow: 0 0 10px var(--liquid-primary);
  animation: loaderSlide 1.2s ease-in-out infinite;
}

@keyframes loaderSlide {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(350%); }
}

.loader-retry {
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border: var(--glass-border);
  border-radius: 30px;
  color: var(--liquid-primary);
  padding: 10px 24px;
  cursor: pointer;
  box-shadow: var(--glass-shadow);
  transition: all 0.2s ease;
}

.loader-retry:hover { 
  background: rgba(203, 213, 225, 0.2); 
  border-color: var(--liquid-primary);
  box-shadow: 0 0 15px var(--liquid-primary-dim);
  transform: scale(1.05);
}

.loader-retry.hidden { display: none; }

#errorBanner {
  position: absolute;
  top: 20px; left: 50%;
  transform: translateX(-50%);
  background-color: rgba(75, 85, 99, 0.9); /* Slate gray */
  color: #fff;
  backdrop-filter: blur(10px);
  font-weight: 600;
  font-size: 13px;
  padding: 12px 24px;
  border-radius: 30px;
  box-shadow: 0 8px 24px rgba(75, 85, 99, 0.4);
  z-index: 30;
  display: none;
  text-align: center;
}

/* Glass Gallery Strip */
#gallery {
  flex: 0 0 var(--gallery-width);
  width: var(--gallery-width);
  height: 100%;
  background-color: var(--liquid-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  color: var(--glass-text);
  border: var(--glass-border);
  border-radius: var(--glass-radius);
  box-shadow: var(--glass-shadow);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.gallery-head {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 20px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.gallery-title {
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: white;
  text-shadow: 0 0 8px var(--liquid-primary-dim);
}

.gallery-count {
  font-weight: 500;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.7);
}

.strip-complete-msg {
  flex: 0 0 auto;
  margin: 16px 16px 0;
  padding: 12px 16px;
  font-weight: 500;
  font-size: 12px;
  line-height: 1.5;
  text-align: center;
  letter-spacing: 0.02em;
  color: var(--liquid-ok);
  background: rgba(241, 245, 249, 0.1);
  border: 1px solid rgba(241, 245, 249, 0.3);
  border-radius: 16px;
  display: none;
}

.strip-complete-msg.visible { display: block; }

.gallery-strip {
  flex: 1 1 auto;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.gallery-strip::-webkit-scrollbar { width: 4px; }
.gallery-strip::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, 0.2); border-radius: 10px; }
.gallery-strip::-webkit-scrollbar-track { background: transparent; }

.gallery-empty {
  font-weight: 400;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.5);
  text-align: center;
  padding: 30px 10px;
}

.print {
  background-color: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border: var(--glass-border);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
  border-radius: 16px;
  padding: 10px 10px 14px;
  animation: printDrop 0.5s cubic-bezier(0.2, 0.8, 0.3, 1.1);
  flex-shrink: 0;
}

@keyframes printDrop {
  0% { opacity: 0; transform: translateY(-20px) scale(0.95); }
  100% { opacity: 1; transform: translateY(0) scale(1); }
}

.print canvas {
  width: 100%;
  display: block;
  border-radius: 8px;
}

.print .print-label {
  font-weight: 600;
  font-size: 11px;
  letter-spacing: 0.05em;
  color: rgba(255, 255, 255, 0.8);
  text-align: center;
  margin-top: 10px;
}

.gallery-actions {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.gallery-action-btn {
  width: 100%;
  padding: 12px 0;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: var(--liquid-bg);
  border: var(--glass-border);
  border-radius: 30px;
  color: var(--glass-text);
  cursor: pointer;
  box-shadow: var(--glass-shadow);
  transition: all 0.2s ease;
}

.gallery-action-btn:hover:not(:disabled) {
  background: var(--liquid-bg-hover);
  border-color: rgba(255, 255, 255, 0.4);
  transform: translateY(-2px);
}

.gallery-action-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
  box-shadow: none;
}

.gallery-action-btn--danger {
  color: #ff4d4d; 
}

.gallery-action-btn--danger:hover:not(:disabled) {
  background: rgba(255, 77, 77, 0.15); 
  border-color: #ff4d4d;
  box-shadow: 0 4px 15px rgba(255, 77, 77, 0.3);
}