:root {
  --cream: #FFF4D8;
  --mint: #9FE7C0;
  --peach: #FFB49A;
  --lavender: #CBB7FF;
  --sky: #8FD8FF;
  --star: #FFE66D;
  --plum: #3A2C4D;
  --coral: #FF6F7D;
  --shadow: rgba(58, 44, 77, 0.22);
}

/* Typography compliance note: Space Mon* Mono** used sparingly as a retro console accent. */

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--plum);
  background: var(--cream);
  font-family: "Nunito", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  overflow-x: hidden;
}

button {
  font: inherit;
  color: inherit;
}

.starfield {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(circle at 8% 18%, var(--star) 0 3px, transparent 4px),
    radial-gradient(circle at 23% 64%, var(--peach) 0 2px, transparent 3px),
    radial-gradient(circle at 91% 22%, var(--star) 0 4px, transparent 5px),
    radial-gradient(circle at 78% 80%, var(--sky) 0 3px, transparent 4px),
    radial-gradient(circle at 42% 36%, var(--lavender) 0 2px, transparent 3px);
  animation: twinkle 5s ease-in-out infinite alternate;
}

.orbit-rail {
  position: fixed;
  z-index: 20;
  left: 24px;
  top: 50%;
  width: 110px;
  transform: translateY(-50%);
  display: grid;
  gap: 14px;
  padding: 16px 10px;
  border: 3px solid var(--plum);
  border-radius: 999px;
  background: rgba(255, 244, 216, 0.78);
  box-shadow: 8px 8px 0 var(--shadow);
}

.orbit-rail::before {
  content: "";
  position: absolute;
  inset: 28px 50% 28px auto;
  width: 3px;
  background: repeating-linear-gradient(to bottom, var(--plum) 0 8px, transparent 8px 16px);
  opacity: .45;
}

.orbit-rail a {
  position: relative;
  display: grid;
  justify-items: center;
  text-decoration: none;
  color: var(--plum);
  font-family: "Gaegu", "Comic Sans MS", cursive;
  font-weight: 700;
}

.orbit-rail span {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 3px solid var(--plum);
  border-radius: 50%;
  background: var(--cream);
  box-shadow: 4px 4px 0 var(--peach);
  transition: transform .25s ease, background .25s ease;
}

.orbit-rail em {
  font-style: normal;
  font-size: 13px;
  line-height: 1;
  margin-top: 5px;
}

.orbit-rail a.active span,
.orbit-rail a:hover span {
  transform: rotate(-8deg) scale(1.08);
  background: var(--star);
}

.scene {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  overflow: hidden;
  padding: 56px 72px 56px 150px;
  isolation: isolate;
}

.hero-scene {
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at 50% 48%, rgba(255, 230, 109, .52), transparent 24%),
    radial-gradient(circle at 72% 28%, rgba(203, 183, 255, .72), transparent 32%),
    linear-gradient(135deg, var(--cream), var(--sky) 52%, var(--lavender));
}

.cosmic-halo {
  position: absolute;
  width: 86vmin;
  height: 86vmin;
  border: 5px dashed rgba(58, 44, 77, .42);
  border-radius: 50%;
  animation: slowSpin 36s linear infinite;
}

.label-tape {
  position: absolute;
  top: 34px;
  right: 52px;
  padding: 9px 18px;
  border: 3px solid var(--plum);
  border-radius: 12px 18px 10px 20px;
  background: var(--peach);
  font-family: "Space Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px;
  letter-spacing: .06em;
  transform: rotate(2deg);
  box-shadow: 6px 6px 0 var(--shadow);
}

.hero-orbit {
  position: relative;
  width: min(86vmin, 820px);
  height: min(86vmin, 820px);
}

.orbit-lines {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  filter: drop-shadow(0 16px 0 rgba(58, 44, 77, .08));
}

.orbit-lines circle,
.orbit-lines path {
  fill: none;
  stroke: var(--plum);
  stroke-width: 5;
  stroke-linecap: round;
  stroke-dasharray: 12 16;
  opacity: .56;
}

.title-card,
.wiki-drawer,
.chapter-copy,
.constellation-card,
.final-sticker {
  border: 4px solid var(--plum);
  border-radius: 32px 24px 38px 22px;
  box-shadow: 10px 12px 0 var(--shadow);
}

.title-card {
  position: absolute;
  left: 50%;
  top: 50%;
  width: min(560px, 78vw);
  padding: 26px 32px 30px;
  transform: translate(-50%, -50%) rotate(-2deg);
  background: rgba(255, 244, 216, .94);
}

.eyebrow {
  margin: 0 0 8px;
  font-family: "Gaegu", "Comic Sans MS", cursive;
  font-size: clamp(1.05rem, 2vw, 1.45rem);
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: lowercase;
}

h1, h2, h3 {
  margin: 0;
  font-weight: 400;
}

h1,
h2 {
  font-family: "Patrick Hand", "Comic Sans MS", cursive;
  line-height: .88;
}

h1 {
  font-size: clamp(4.8rem, 13vw, 10.8rem);
  letter-spacing: -.04em;
  text-shadow: 4px 4px 0 var(--star), 8px 8px 0 var(--lavender);
}

h2 {
  font-size: clamp(3rem, 7vw, 6.7rem);
  letter-spacing: -.035em;
}

h3 {
  font-family: "Gaegu", "Comic Sans MS", cursive;
  font-size: clamp(1.9rem, 3vw, 2.8rem);
}

p {
  font-size: clamp(1rem, 1.5vw, 1.28rem);
  line-height: 1.5;
}

.artifact {
  position: absolute;
  border: 0;
  background: transparent;
  cursor: pointer;
  animation: floatObject 5.5s ease-in-out infinite;
}

.artifact span {
  display: block;
  width: clamp(88px, 13vmin, 128px);
  height: clamp(88px, 13vmin, 128px);
  border: 5px solid var(--plum);
  box-shadow: 8px 8px 0 var(--shadow);
  transition: transform .24s ease, filter .24s ease;
}

.artifact b {
  display: inline-block;
  margin-top: 8px;
  padding: 4px 10px;
  border: 3px solid var(--plum);
  border-radius: 12px;
  background: var(--cream);
  font-family: "Gaegu", "Comic Sans MS", cursive;
  font-size: 1rem;
}

.artifact:hover span,
.artifact:focus span {
  transform: scale(1.1) rotate(-6deg);
  filter: saturate(1.15);
}

.can { left: 5%; top: 28%; animation-delay: -.4s; }
.jar { right: 7%; top: 19%; animation-delay: -1.6s; }
.box { right: 11%; bottom: 14%; animation-delay: -2.4s; }
.peel { left: 12%; bottom: 10%; animation-delay: -3.2s; }

.can span {
  border-radius: 28px 28px 40px 40px;
  background: linear-gradient(90deg, var(--sky), var(--mint));
}
.can span::before { content: "🚀"; }
.jar span {
  border-radius: 42% 42% 50% 50%;
  background: radial-gradient(circle at 32% 28%, white 0 12%, transparent 13%), var(--sky);
}
.box span {
  border-radius: 16px;
  background: linear-gradient(135deg, var(--peach) 0 45%, var(--star) 46% 54%, var(--peach) 55%);
  transform: rotate(8deg);
}
.peel span {
  border-radius: 70% 20% 70% 20%;
  background: var(--star);
  clip-path: ellipse(38% 50% at 54% 50%);
}

.wiki-drawer {
  position: absolute;
  right: 28px;
  bottom: 34px;
  max-width: 360px;
  padding: 22px 24px;
  background: var(--mint);
  transform: rotate(1.5deg);
}

.drawer-kicker,
.revision-stamp {
  margin: 0 0 8px;
  font-family: "Space Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: .78rem;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.chapter {
  display: grid;
  grid-template-columns: minmax(300px, 48vw) 1fr;
  align-items: center;
  gap: 5vw;
}

.chapter::before {
  content: "";
  position: absolute;
  inset: 8% -12% auto auto;
  width: 58vw;
  height: 58vw;
  border: 5px dashed rgba(58, 44, 77, .25);
  border-radius: 50%;
  animation: slowSpin 44s linear infinite reverse;
  z-index: -1;
}

.chapter-copy,
.constellation-card,
.final-sticker {
  padding: clamp(24px, 4vw, 44px);
  background: rgba(255, 244, 216, .92);
}

.sorting-scene {
  background:
    radial-gradient(circle at 72% 44%, var(--lavender), transparent 33%),
    linear-gradient(120deg, var(--cream), var(--mint));
}

.sorting-console {
  display: grid;
  gap: 22px;
}

.constellation-card {
  background: var(--sky);
  transform: rotate(1deg);
}

.material-icon {
  display: grid;
  place-items: center;
  width: 124px;
  height: 124px;
  border: 5px solid var(--plum);
  border-radius: 56% 44% 52% 48%;
  background: var(--cream);
  font-size: 4rem;
  box-shadow: 8px 8px 0 var(--shadow);
}

.bin-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.bin {
  padding: 14px 18px;
  border: 4px solid var(--plum);
  border-radius: 18px;
  background: var(--cream);
  font-family: "Gaegu", "Comic Sans MS", cursive;
  font-size: 1.35rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 5px 5px 0 var(--shadow);
  transition: transform .18s ease, background .18s ease;
}

.bin.correct:hover,
.bin.correct.selected {
  background: var(--mint);
  transform: translateY(-5px) rotate(-2deg);
}

.bin.wrong {
  background: var(--coral);
  animation: shakeError .42s ease both;
}

.helper-note {
  min-height: 52px;
  margin: 0;
  padding: 12px 18px;
  border: 3px solid var(--plum);
  border-radius: 18px;
  background: var(--star);
  font-family: "Gaegu", "Comic Sans MS", cursive;
  font-weight: 700;
  box-shadow: 5px 5px 0 var(--shadow);
}

.compost-scene {
  grid-template-columns: 1fr minmax(320px, 46vw);
  background:
    radial-gradient(circle at 32% 50%, rgba(255, 230, 109, .72), transparent 28%),
    linear-gradient(145deg, var(--mint), var(--cream) 54%, var(--peach));
}

.moonrise,
.repair-satellite,
.sunrise-rings {
  position: relative;
  min-height: 560px;
}

.moon {
  position: absolute;
  left: 50%;
  top: 50%;
  display: grid;
  place-items: center;
  width: min(48vw, 430px);
  height: min(48vw, 430px);
  transform: translate(-50%, -50%);
  border: 6px solid var(--plum);
  border-radius: 50%;
  background: radial-gradient(circle at 70% 35%, var(--star), var(--peach) 58%, var(--lavender));
  box-shadow: 18px 18px 0 var(--shadow);
  font-size: 11rem;
  animation: pulseMoon 4s ease-in-out infinite;
}

.orbit-tag {
  position: absolute;
  padding: 10px 18px;
  border: 4px solid var(--plum);
  border-radius: 999px;
  background: var(--cream);
  font-family: "Gaegu", "Comic Sans MS", cursive;
  font-size: 1.45rem;
  font-weight: 700;
  box-shadow: 6px 6px 0 var(--shadow);
}

.tag-one { left: 8%; top: 18%; transform: rotate(-9deg); }
.tag-two { right: 7%; top: 28%; transform: rotate(6deg); }
.tag-three { left: 20%; bottom: 16%; transform: rotate(4deg); }

.repair-scene {
  background:
    repeating-linear-gradient(45deg, transparent 0 28px, rgba(255,255,255,.18) 28px 32px),
    linear-gradient(120deg, var(--lavender), var(--sky));
}

.repair-satellite {
  order: 2;
}

.sat-body {
  position: absolute;
  left: 48%;
  top: 48%;
  display: grid;
  place-items: center;
  width: 220px;
  height: 220px;
  border: 6px solid var(--plum);
  border-radius: 45px 68px 42px 72px;
  background: var(--cream);
  box-shadow: 14px 14px 0 var(--shadow);
  font-size: 6rem;
  transform: translate(-50%, -50%) rotate(8deg);
}

.panel {
  position: absolute;
  display: grid;
  place-items: center;
  width: 160px;
  height: 88px;
  border: 5px solid var(--plum);
  border-radius: 20px;
  background: var(--mint);
  font-family: "Gaegu", "Comic Sans MS", cursive;
  font-size: 1.7rem;
  font-weight: 700;
  box-shadow: 7px 7px 0 var(--shadow);
  animation: floatObject 4.6s ease-in-out infinite;
}

.panel-a { left: 12%; top: 18%; }
.panel-b { right: 8%; top: 30%; animation-delay: -1.3s; background: var(--peach); }
.panel-c { left: 30%; bottom: 8%; animation-delay: -2.1s; background: var(--star); }

.return-scene {
  grid-template-columns: 1fr minmax(320px, 48vw);
  background:
    radial-gradient(circle at 35% 55%, var(--star), transparent 25%),
    linear-gradient(160deg, var(--peach), var(--cream) 45%, var(--mint));
}

.sun-core {
  position: absolute;
  left: 50%;
  top: 50%;
  display: grid;
  place-items: center;
  width: min(46vw, 390px);
  height: min(46vw, 390px);
  transform: translate(-50%, -50%);
  border: 6px solid var(--plum);
  border-radius: 50%;
  background: var(--star);
  font-family: "Patrick Hand", "Comic Sans MS", cursive;
  font-size: clamp(4rem, 8vw, 7rem);
  box-shadow: 0 0 0 34px rgba(255,230,109,.32), 0 0 0 68px rgba(255,180,154,.28), 16px 16px 0 var(--shadow);
  animation: pulseMoon 3.6s ease-in-out infinite;
}

.cap-star {
  position: absolute;
  display: grid;
  place-items: center;
  width: 84px;
  height: 84px;
  border: 4px solid var(--plum);
  border-radius: 50%;
  background: var(--sky);
  font-size: 2rem;
  box-shadow: 6px 6px 0 var(--shadow);
  animation: floatObject 4s ease-in-out infinite;
}

.cap-star.a { left: 12%; top: 18%; }
.cap-star.b { right: 14%; top: 28%; animation-delay: -1.1s; background: var(--lavender); }
.cap-star.c { left: 28%; bottom: 10%; animation-delay: -2s; background: var(--mint); }

.final-sticker {
  background: rgba(255, 244, 216, .94);
  transform: rotate(-1deg);
}

.sticker-pop {
  animation: stickerPop .62s cubic-bezier(.2, 1.4, .4, 1) both;
}

.revision-stamp {
  display: inline-block;
  margin-top: 18px;
  padding: 9px 12px;
  border: 3px solid var(--plum);
  border-radius: 12px;
  background: var(--lavender);
}

.visible .chapter-copy,
.visible .constellation-card,
.visible .final-sticker,
.visible .moonrise,
.visible .repair-satellite,
.visible .sunrise-rings {
  animation: stickerPop .6s cubic-bezier(.2, 1.4, .4, 1) both;
}

@keyframes twinkle {
  from { opacity: .55; transform: translateY(0); }
  to { opacity: .95; transform: translateY(-10px); }
}

@keyframes slowSpin {
  to { transform: rotate(360deg); }
}

@keyframes floatObject {
  0%, 100% { transform: translateY(0) rotate(-2deg); }
  50% { transform: translateY(-18px) rotate(4deg); }
}

@keyframes pulseMoon {
  0%, 100% { scale: 1; }
  50% { scale: 1.035; }
}

@keyframes stickerPop {
  from { opacity: 0; transform: translateY(42px) rotate(-3deg) scale(.92); }
  to { opacity: 1; transform: translateY(0) rotate(0) scale(1); }
}

@keyframes shakeError {
  0%, 100% { transform: translateX(0) rotate(0); box-shadow: 5px 5px 0 var(--shadow); }
  20% { transform: translateX(-8px) rotate(-4deg); box-shadow: 0 0 0 5px rgba(255,111,125,.35), 5px 5px 0 var(--shadow); }
  45% { transform: translateX(7px) rotate(4deg); }
  70% { transform: translateX(-4px) rotate(-2deg); }
}

@media (max-width: 860px) {
  .orbit-rail {
    left: 12px;
    width: 74px;
    padding-inline: 6px;
  }
  .orbit-rail em { display: none; }
  .scene {
    padding: 44px 20px 44px 92px;
  }
  .chapter,
  .compost-scene,
  .return-scene {
    grid-template-columns: 1fr;
  }
  .hero-orbit {
    width: 88vw;
    height: 88vw;
    min-height: 610px;
  }
  .artifact span {
    width: 76px;
    height: 76px;
  }
  .wiki-drawer {
    position: relative;
    right: auto;
    bottom: auto;
    margin-top: 18px;
  }
  .repair-satellite { order: 0; }
}