:root {
  --ink: #0a0a08;
  --ink-soft: #15140f;
  --paper: #eae5d6;
  --signal: #7b5455;
  --signal-dim: #4a3233;
  --danger: #e0533d;
  --ok: #5fae6e;
  --mono: 'IBM Plex Mono', 'SFMono-Regular', Menlo, Consolas, monospace;
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --gallery-width: 220px;

  --gallery-bg: #ffffff;
  --gallery-border: #e3e0d8;
  --gallery-ink: #1c1a16;
  --gallery-ink-soft: #6b665c;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  min-height: 100dvh;
  background: var(--ink);
  overflow-x: hidden;
  font-family: var(--sans);
  color: var(--paper);
}

#app {
  display: flex;
  width: 100dvw;
  height: 100dvh;
  animation: fadeIn 0.5s ease-out forwards;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-page {
  animation: fadeIn 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

#stage {
  position: relative;
  flex: 1 1 auto;
  height: 100vh;
  background: #000;
  overflow: hidden;
}

video {
  display: none;
}

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


.hud-top {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  pointer-events: none;
  z-index: 5;
}

.brand {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--signal);
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.brand small {
  color: var(--paper);
  opacity: 0.55;
  letter-spacing: 0.1em;
}

.status-pill {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 6px 12px;
  border-radius: 2px;
  border: 1px solid rgba(234, 229, 214, 0.25);
  background: rgba(10, 10, 8, 0.6);
  display: flex;
  align-items: center;
  gap: 8px;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--danger);
  box-shadow: 0 0 6px var(--danger);
  transition: background 0.2s, box-shadow 0.2s;
}

.status-dot.live {
  background: var(--ok);
  box-shadow: 0 0 6px var(--ok);
}

.status-dot.armed {
  background: var(--signal);
  box-shadow: 0 0 8px var(--signal);
}

.status-dot.solved {
  background: var(--ok);
  box-shadow: 0 0 10px var(--ok);
}


.hud-bottom {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: flex-end;
  justify-content: flex-start;
  gap: 16px;
  padding: 18px 22px 22px;
  background: linear-gradient(to top, rgba(10, 10, 8, 0.9), transparent);
  pointer-events: none;
  z-index: 5;
}

.gesture-key {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.03em;
  color: rgba(234, 229, 214, 0.7);
  max-width: 100%;
}

.gesture-key .item {
  display: flex;
  align-items: center;
  gap: 7px;
}

.gesture-key .swatch {
  width: 9px;
  height: 9px;
  border: 1.5px solid var(--paper);
  opacity: 0.7;
  flex-shrink: 0;
}

.gesture-key .swatch.pinch {
  border-radius: 50%;
  border-color: var(--signal);
}

.gesture-key .swatch.drag {
  border-radius: 50%;
  border-color: var(--ok);
  border-style: dashed;
}

.gesture-key .swatch.fist {
  border-radius: 2px;
  border-color: var(--danger);
  background: var(--danger);
  opacity: 0.9;
}

.progress-badge {
  position: absolute;
  top: 64px;
  right: 22px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 7px 12px;
  border-radius: 2px;
  border: 1px solid rgba(245, 197, 24, 0.35);
  background: rgba(10, 10, 8, 0.7);
  color: var(--signal);
  z-index: 5;
  opacity: 0;
  transform: translateY(-6px);
  transition: opacity 0.25s ease, transform 0.25s ease, border-color 0.25s ease, color 0.25s ease;
  pointer-events: none;
}

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

.progress-badge.solved {
  border-color: rgba(95, 174, 110, 0.6);
  color: var(--ok);
}


#loadingOverlay {
  position: absolute;
  inset: 0;
  background: var(--ink);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  z-index: 20;
  transition: opacity 0.4s ease;
}

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

.loader-text {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--signal);
  text-align: center;
  max-width: 80vw;
}

.loader-bar {
  width: 220px;
  height: 2px;
  background: rgba(234, 229, 214, 0.15);
  overflow: hidden;
}

.loader-bar::after {
  content: '';
  display: block;
  width: 40%;
  height: 100%;
  background: var(--signal);
  animation: loaderSlide 1.1s ease-in-out infinite;
}

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

  100% {
    transform: translateX(350%);
  }
}

.loader-retry {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: transparent;
  border: 1px solid var(--signal);
  color: var(--signal);
  padding: 8px 16px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.loader-retry:hover {
  background: var(--signal);
  color: #1a1400;
}

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

#errorBanner {
  position: absolute;
  top: 18px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--danger);
  color: #1a0a08;
  font-family: var(--mono);
  font-size: 12px;
  padding: 10px 16px;
  border-radius: 2px;
  z-index: 30;
  display: none;
  max-width: 80vw;
  text-align: center;
}


#gallery {
  flex: 0 0 var(--gallery-width);
  width: var(--gallery-width);
  height: 100vh;
  background: var(--gallery-bg);
  color: var(--gallery-ink);
  border-left: 1px solid var(--gallery-border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.gallery-head {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 14px 10px;
  border-bottom: 1px solid var(--gallery-border);
}

.gallery-title {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--signal-dim);
}

.gallery-count {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--gallery-ink-soft);
}


.strip-complete-msg {
  flex: 0 0 auto;
  margin: 12px 14px 0;
  padding: 10px 12px;
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.5;
  text-align: center;
  letter-spacing: 0.03em;
  color: #3d6b46;
  background: #eaf5ec;
  border: 1px solid #bfe3c6;
  border-radius: 3px;
  display: none;
}

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

.gallery-strip {
  flex: 1 1 auto;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.gallery-strip::-webkit-scrollbar {
  width: 6px;
}

.gallery-strip::-webkit-scrollbar-thumb {
  background: var(--gallery-border);
  border-radius: 3px;
}

.gallery-strip::-webkit-scrollbar-track {
  background: transparent;
}

.gallery-empty {
  font-family: var(--mono);
  font-size: 10.5px;
  line-height: 1.6;
  color: var(--gallery-ink-soft);
  text-align: center;
  padding: 24px 4px;
}


.print {
  background: #fff;
  border: 1px solid var(--gallery-border);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
  padding: 6px 6px 10px;
  animation: printDrop 0.4s cubic-bezier(0.2, 0.8, 0.3, 1.1);
  flex-shrink: 0;
}

@keyframes printDrop {
  0% {
    opacity: 0;
    transform: translateY(-14px) rotate(-2deg);
  }

  100% {
    opacity: 1;
    transform: translateY(0) rotate(0deg);
  }
}

.print canvas {
  width: 100%;
  display: block;
}

.print .print-label {
  font-family: var(--mono);
  font-size: 8.5px;
  letter-spacing: 0.06em;
  color: var(--gallery-ink-soft);
  text-align: center;
  margin-top: 6px;
}

.gallery-actions {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px 14px;
  border-top: 1px solid var(--gallery-border);
}

.gallery-action-btn {
  width: 100%;
  padding: 9px 0;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: #fff;
  border: 1px solid var(--signal-dim);
  color: var(--signal-dim);
  cursor: pointer;
  transition: background 0.15s, color 0.15s, opacity 0.15s;
}

.gallery-action-btn:hover:not(:disabled) {
  background: var(--signal);
  border-color: var(--signal);
  color: #1a1400;
}

.gallery-action-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.gallery-action-btn--danger {
  border-color: var(--danger);
  color: var(--danger);
}

.gallery-action-btn--danger:hover {
  background: var(--danger);
  border-color: var(--danger);
  color: #fff;
}

/* Responsive adjustments for laptop and short viewports (Requirement 9) */
@media (max-width: 1440px) {
  #landingPage header {
    top: 12px;
  }

  #landingPage header>div {
    padding-top: 10px;
    padding-bottom: 10px;
  }

  #landingPage .floating.polaroid {
    opacity: 0.95;
  }
}

@media (max-height: 800px) {
  #landingPage section {
    padding-top: 4.5rem !important;
    padding-bottom: 2rem !important;
  }
}