:root {
  --bg: #000;
  --panel: rgba(15, 15, 15, 0.88);
  --panel-soft: rgba(0, 0, 0, 0.5);
  --text: #fff;
  --muted: #ccc;
  --border: rgba(255, 255, 255, 0.12);
  --danger: #ff6666;
  --success: #aef7d3;
}

* {
  box-sizing: border-box;
}
html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
    Helvetica, Arial, sans-serif;
}

#canvas-container {
  position: absolute;
  inset: 0;
  z-index: 10;
}

#webcam-video {
  position: absolute;
  inset: 0;
  width: 100vw;
  height: 100vh;
  object-fit: cover;
  z-index: 5;
  transform: scaleX(-1);
  filter: grayscale(80%) brightness(0.3) contrast(1.3);
}

#ui-layer {
  position: absolute;
  top: 40px;
  left: 40px;
  z-index: 20;
  pointer-events: none;
}

#ui-header {
  display: flex;
  align-items: center;
  gap: 15px;
  margin-bottom: 12px;
  height: 40px;
}

#ui-logo {
  height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 2px 10px rgba(0, 0, 0, 0.8));
}

#ui-title {
  margin: 0;
  line-height: 40px;
  transform: translateY(-4px);
  font-size: 24px;
  font-weight: 300;
  letter-spacing: 6px;
  text-transform: uppercase;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.8);
}

#stats {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.4px;
  color: #bbb;
  background: linear-gradient(180deg, rgba(14, 18, 30, 0.72), rgba(7, 9, 15, 0.62));
  padding: 4px 10px;
  border-radius: 7px;
  border: 1px solid rgba(179, 212, 255, 0.08);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.18);
  backdrop-filter: blur(10px);
}


#top-controls {
  position: absolute;
  top: 40px;
  right: 40px;
  z-index: 100;
  font-size: 16px;
  letter-spacing: 2px;
  color: #aaa;
  user-select: none;
  display: flex;
  align-items: center;
  gap: 8px;
}

#top-controls span {
  transition: color 0.3s;
  padding: 5px;
  display: flex;
  align-items: center;
}

#top-controls span:not(.divider) {
  cursor: pointer;
}

#top-controls span:hover {
  color: #fff;
}

#top-controls .divider {
  cursor: default;
  color: #666;
}

#top-controls .active {
  color: #fff;
  font-weight: 600;
}

#credit {
  position: absolute;
  bottom: 30px;
  right: 40px;
  z-index: 100;
  font-size: 12px;
  letter-spacing: 1px;
  color: #888;
}

#credit a {
  color: #ccc;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s;
}

#credit a:hover {
  color: #fff;
}

#onboarding-layer {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 100;
  background: rgba(15, 15, 15, 0.85);
  padding: 50px;
  border-radius: 12px;
  border: 1px solid var(--border);
  text-align: center;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.9);
  width: 85%;
  max-width: 560px;
  backdrop-filter: blur(15px);
}

#onboarding-layer h2 {
  margin: 0 0 25px 0;
  font-weight: 300;
  font-size: 32px;
  letter-spacing: 3px;
  text-transform: uppercase;
}

#ob-content p {
  color: #ddd;
  line-height: 1.8;
  font-size: 18px;
  margin-bottom: 20px;
  font-weight: 300;
}

#ob-content strong {
  color: #fff;
  font-weight: 600;
}

.ob-btn {
  background-color: transparent;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.4);
  padding: 12px 24px;
  font-size: 15px;
  letter-spacing: 2px;
  cursor: pointer;
  font-weight: 600;
  border-radius: 6px;
  transition: all 0.3s;
  margin: 10px;
  font-family: inherit;
  text-transform: uppercase;
}

.ob-btn:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: #fff;
}

.success-text {
  color: var(--success) !important;
}
.error-text {
  color: var(--danger) !important;
}

.overlay {
  position: absolute;
  inset: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 200;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(5px);
  opacity: 0;
}

.win-box,
.fact-box {
  background: rgba(15, 15, 15, 0.92);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 0 100px rgba(255, 255, 255, 0.1);
  color: #fff;
}

.win-box {
  padding: 50px;
  border-radius: 16px;
  text-align: center;
  pointer-events: auto;
  max-width: 760px;
}

.win-box h1 {
  font-size: 28px;
  margin: 0 0 24px 0;
  color: #fff;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.win-box p {
  color: #ccc;
  font-size: 18px;
  line-height: 1.7;
  margin-bottom: 30px;
  font-weight: 300;
}

.win-box .level-complete-instruction {
  color: #f5f7ff;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  padding: 16px 18px;
  margin: -8px auto 28px;
  max-width: 620px;
  font-weight: 500;
}

.fact-box {
  width: min(900px, 92vw);
  border-radius: 18px;
  overflow: hidden;
  display: grid;
  grid-template-columns: 320px 1fr;
  pointer-events: auto;
}

.fact-image-wrap {
  background: radial-gradient(
    circle at center,
    rgba(255, 255, 255, 0.08),
    rgba(0, 0, 0, 0.25)
  );
  min-height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 36px;
  overflow: visible;
}

#fact-image {
  width: auto;
  max-width: 320px;
  max-height: 480px;
  object-fit: contain;
}

.fact-copy {
  padding: 36px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.fact-kicker {
  color: #bbb;
  text-transform: uppercase;
  letter-spacing: 3px;
  font-size: 12px;
  margin-bottom: 10px;
}

#fact-title {
  margin: 0 0 12px 0;
  font-size: 30px;
  font-weight: 300;
  letter-spacing: 2px;
  text-transform: uppercase;
}

#fact-text {
  margin: 0 0 24px 0;
  color: #ddd;
  font-size: 18px;
  line-height: 1.8;
  font-weight: 300;
}

@media (max-width: 768px) {
  #ui-layer {
    top: 20px;
    left: 20px;
  }

  #top-controls {
    top: 20px;
    right: 20px;
  }


  #credit {
    right: 20px;
    bottom: 18px;
  }

  #onboarding-layer {
    padding: 28px;
    width: calc(100vw - 32px);
  }

  #onboarding-layer h2 {
    font-size: 24px;
  }

  #ob-content p {
    font-size: 16px;
  }

  .fact-box {
    grid-template-columns: 1fr;
  }

  .fact-image-wrap {
    padding: 18px;
  }

  #fact-image {
    max-width: 180px;
  }

  .fact-copy {
    padding: 24px;
  }

  #fact-title {
    font-size: 24px;
  }

  #fact-text {
    font-size: 16px;
  }
}

.planet-card-sprite {
  width: 240px;
  aspect-ratio: 1 / 1.45;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.35);

  background-image: url('illustrations/planet-cards.png');
  background-size: 400% 200%;
  background-repeat: no-repeat;
  background-color: #111;
}

.planet-card-sprite.mercury {
  background-position: 0% 0%;
}
.planet-card-sprite.venus {
  background-position: 33.333% 0%;
}
.planet-card-sprite.earth {
  background-position: 66.666% 0%;
}
.planet-card-sprite.mars {
  background-position: 100% 0%;
}

.planet-card-sprite.jupiter {
  background-position: 0% 100%;
}
.planet-card-sprite.saturn {
  background-position: 33.333% 100%;
}
.planet-card-sprite.uranus {
  background-position: 66.666% 100%;
}
.planet-card-sprite.neptune {
  background-position: 100% 100%;
}

.card-reveal-stage {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  perspective: 900px;
}

#fact-image {
  width: auto;
  max-width: 320px;
  max-height: 480px;
  object-fit: contain;
  transform-style: preserve-3d;
  will-change: transform, filter, opacity;
}

.card-burst {
  position: absolute;
  width: 320px;
  height: 320px;
  border-radius: 999px;
  background:
    radial-gradient(circle, rgba(255,255,255,0.8) 0%, rgba(255,255,255,0.25) 18%, transparent 58%),
    conic-gradient(
      from 0deg,
      transparent,
      rgba(255,255,255,0.7),
      transparent,
      rgba(255,255,255,0.45),
      transparent
    );
  opacity: 0;
  transform: scale(0.2) rotate(0deg);
  filter: blur(2px);
  pointer-events: none;
}

.fact-box.revealing #fact-image {
  animation: gachaCardReveal 1.05s cubic-bezier(.17,.84,.44,1) both;
}

.fact-box.revealing .card-burst {
  animation: gachaBurst 0.9s ease-out both;
}

@keyframes gachaCardReveal {
  0% {
    opacity: 0;
    transform: scale(0.25) rotateY(720deg) rotateZ(-16deg);
    filter: brightness(3) blur(8px);
  }

  45% {
    opacity: 1;
    transform: scale(1.18) rotateY(120deg) rotateZ(6deg);
    filter: brightness(2.4) blur(1px);
  }

  70% {
    transform: scale(0.96) rotateY(-18deg) rotateZ(-2deg);
    filter: brightness(1.35) blur(0);
  }

  100% {
    opacity: 1;
    transform: scale(1) rotateY(0deg) rotateZ(0deg);
    filter: brightness(1) blur(0);
  }
}

@keyframes gachaBurst {
  0% {
    opacity: 0;
    transform: scale(0.2) rotate(0deg);
  }

  30% {
    opacity: 0.9;
    transform: scale(1.15) rotate(120deg);
  }

  100% {
    opacity: 0;
    transform: scale(1.9) rotate(280deg);
  }
}