:root {
  color-scheme: light;
  --bg-1: #0f2027;
  --bg-2: #203a43;
  --bg-3: #2c5364;
  --ink: #e7f5ff;
  --accent: #ffd166;
}

* {
  box-sizing: border-box;
}

@font-face {
  font-family: 'Orbitron';
  src: url('/assets/fonts/Orbitron-VariableFont_wght.woff2')format('woff2');
  font-display: swap;
}

body {
  margin: 0;
  background: #000000;
  color: var(--ink);
  overflow: hidden;
}

#sceneWrap {
  position: fixed;
  inset: 0;
  z-index: 1;
  transform: scale(1) translateZ(0);
  transform-origin: center;
  transition: transform 5s cubic-bezier(0.12, 0.62, 0.12, 1), opacity 3.4s ease;
  opacity: 1;
}

#cubeView.is-warping #sceneWrap {
  transform: scale(1.7) translateZ(420px);
  opacity: 0;
  transition-delay: 3.2s;
}

#cubeView.is-warping {
  pointer-events: none;
}

.cube-star {
  position: absolute;
  top: 16px;
  right: 16px;
  z-index: 3;
  font-size: 24px;
  color: #ffd166;
  text-shadow: 0 0 10px rgba(255, 209, 102, 0.5);
  transform: scale(1);
  transition: transform 0.2s ease, opacity 0.6s ease;
  user-select: none;
}

.cube-star:hover {
  transform: scale(1.25);
}

.cube-star.star-dim {
  opacity: 0.35;
}

.cube-star.star-hidden {
  opacity: 0;
  pointer-events: none;
}

#hud {
  position: absolute;
  top: 16px;
  left: 16px;
  padding: 12px 16px;
  background: rgba(15, 24, 32, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  backdrop-filter: blur(10px);
  z-index: 2;
  transition: opacity 0.6s ease;
}

#aboutPanel {
  position: absolute;
  right: 16px;
  top: 16px;
  z-index: 2;
  display: inline-flex;
  align-items: flex-end;
  transition: opacity 0.6s ease;
}

#aboutPanel.about-dim {
  opacity: 0.35;
}

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

#aboutPanel .about-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

#aboutPanel .about-toggle {
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(10, 16, 22, 0.6);
  color: var(--ink);
  border-radius: 8px;
  padding: 4px 8px;
  font-size: 12px;
  font-family: inherit;
  cursor: pointer;
}

#aboutPanel .about-toggle:hover {
  background: rgba(20, 28, 36, 0.75);
}

#aboutPanel .about-content {
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  width: min(220px, 72vw);
  padding: 10px 12px;
  background: rgba(15, 24, 32, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  backdrop-filter: blur(10px);
  font-size: 12px;
  line-height: 1.5;
  max-height: 0;
  transition: max-height 0.45s ease, opacity 0.45s ease, transform 0.45s ease;
  opacity: 0;
  transform: translateY(8px);
  overflow: hidden;
}

#aboutPanel.about-open .about-content {
  max-height: 320px;
  opacity: 0.95;
  transform: translateY(0);
  overflow: auto;
}

#aboutPanel ul {
  margin: 6px 0 0;
  padding-left: 16px;
}

#aboutPanel ul li::marker {
  content: "・ ";
  color: var(--accent);
}

#aboutPanel .about-divider {
  height: 1px;
  margin: 10px 0 8px;
  background: rgba(255, 255, 255, 0.12);
}

#aboutPanel .about-source {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
}

#aboutPanel .about-source svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

#aboutPanel a {
  color: var(--accent);
  text-decoration: none;
}

#aboutPanel a:hover {
  text-decoration: underline;
}

.hud-header {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.hud-text {
  flex: 1;
}

.hud-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
}

.hud-toggle button {
  width: 26px;
  height: 26px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(10, 16, 22, 0.6);
  color: var(--ink);
  font-size: 14px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.hud-toggle .chevron {
  width: 10px;
  height: 10px;
  display: inline-block;
  border-right: 2px solid rgba(255, 255, 255, 0.85);
  border-bottom: 2px solid rgba(255, 255, 255, 0.85);
}

.hud-toggle .chevron-down {
  transform: rotate(45deg);
}

.hud-toggle .chevron-up {
  transform: rotate(-135deg);
}

.hud-toggle button:hover {
  background: rgba(20, 28, 36, 0.75);
}

.hud-toggle button:focus-visible {
  outline: 2px solid rgba(255, 255, 255, 0.35);
  outline-offset: 2px;
}

#hud.hud-dim {
  opacity: 0.35;
}

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

#hud h1 {
  margin: 0 0 4px;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.cube-intro-tag {
  position: absolute;
  left: 50%;
  bottom: 52px;
  transform: translateX(-50%);
  font-size: 18px;
  letter-spacing: 0.12em;
  color: rgba(231, 245, 255, 0.8);
  opacity: 0;
  z-index: 2;
  pointer-events: none;
}

.cube-intro-tag.is-active {
  animation: cubeIntroTagFade 3s ease forwards;
}

@keyframes cubeIntroTagFade {
  0% {
    opacity: 0;
    transform: translateX(-50%) translateY(8px);
  }
  20% {
    opacity: 0.8;
    transform: translateX(-50%) translateY(0);
  }
  80% {
    opacity: 0.8;
    transform: translateX(-50%) translateY(0);
  }
  100% {
    opacity: 0;
    transform: translateX(-50%) translateY(-6px);
  }
}

#hudTitle {
  cursor: pointer;
}

#hud p {
  margin: 0;
  font-size: 13px;
  opacity: 0.8;
}

#hud.hud-collapsed .hud-controls {
  display: none;
}

#hud #hudShow {
  display: none;
}

#hud.hud-collapsed #hudShow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

#hud.hud-collapsed #hudHide {
  display: none;
}

.control {
  margin-top: 10px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 8px;
  font-size: 12px;
}

.control label {
  justify-self: start;
}

.control > span {
  justify-self: end;
  text-align: right;
}

.control input[type="range"] {
  width: 140px;
  justify-self: center;
}

.control .switch,
.control button {
  justify-self: center;
}

.control button {
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(10, 16, 22, 0.6);
  color: var(--ink);
  padding: 6px 10px;
  font-family: inherit;
  cursor: pointer;
}

.control button:hover {
  background: rgba(20, 28, 36, 0.75);
}

canvas {
  display: block;
  position: relative;
  z-index: 1;
}