/* ============================================
   Journey of a Star - Scroll-Driven Animation
   A CSS Zen Garden Piece
   ============================================ */

/* Custom Properties */
:root {
  --void-black: #0a0a0f;
  --nebula-purple: #4a1a6b;
  --nebula-pink: #d63384;
  --nebula-blue: #0d6efd;
  --star-white: #fff8e7;
  --star-yellow: #ffd43b;
  --star-orange: #fd7e14;
  --star-red: #dc3545;
  --supernova-gold: #ffc107;
  --remnant-teal: #20c997;
  --remnant-blue: #6f42c1;
}

/* Reset & Base */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--void-black);
  color: var(--star-white);
  overflow-x: hidden;
}

/* Scroll Container with Snap */
.scroll-container {
  height: 100vh;
  overflow-y: auto;
  scroll-snap-type: y mandatory;
  scroll-behavior: smooth;
}

/* Scene Base */
.scene {
  min-height: 100vh;
  scroll-snap-align: start;
  scroll-snap-stop: always;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.content {
  position: relative;
  z-index: 10;
  text-align: center;
  max-width: 600px;
  padding: 2rem;
}

.content h2 {
  font-size: clamp(2rem, 8vw, 4rem);
  margin-bottom: 1.5rem;
  font-weight: 300;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.content p {
  font-size: clamp(1rem, 3vw, 1.25rem);
  line-height: 1.8;
  opacity: 0.9;
  font-weight: 300;
}

/* ============================================
   Section 1: The Void (Intro)
   ============================================ */
.void {
  background: radial-gradient(ellipse at center, #0f0f1a 0%, var(--void-black) 100%);
}

.void .title {
  font-size: clamp(2.5rem, 10vw, 5rem);
  font-weight: 100;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--star-white), var(--nebula-blue), var(--nebula-purple));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: titleGlow 3s ease-in-out infinite;
}

.void .subtitle {
  font-size: clamp(1rem, 3vw, 1.5rem);
  opacity: 0.6;
  letter-spacing: 0.2em;
  margin-bottom: 3rem;
}

@keyframes titleGlow {
  0%, 100% { filter: brightness(1); }
  50% { filter: brightness(1.3); }
}

/* Scroll Indicator */
.scroll-indicator {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  animation: bounce 2s infinite;
}

.arrow {
  width: 20px;
  height: 20px;
  border-right: 2px solid var(--star-white);
  border-bottom: 2px solid var(--star-white);
  transform: rotate(45deg);
  opacity: 0.3;
}

.arrow:nth-child(1) { animation: arrowFade 2s infinite 0s; }
.arrow:nth-child(2) { animation: arrowFade 2s infinite 0.2s; }
.arrow:nth-child(3) { animation: arrowFade 2s infinite 0.4s; }

@keyframes arrowFade {
  0%, 100% { opacity: 0.2; }
  50% { opacity: 0.8; }
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(10px); }
}

/* Stars Background */
.stars-background {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(2px 2px at 20px 30px, white, transparent),
    radial-gradient(2px 2px at 40px 70px, rgba(255,255,255,0.8), transparent),
    radial-gradient(1px 1px at 90px 40px, white, transparent),
    radial-gradient(2px 2px at 160px 120px, rgba(255,255,255,0.9), transparent),
    radial-gradient(1px 1px at 230px 80px, white, transparent),
    radial-gradient(2px 2px at 300px 150px, rgba(255,255,255,0.7), transparent),
    radial-gradient(1px 1px at 350px 200px, white, transparent);
  background-size: 400px 300px;
  animation: twinkle 4s ease-in-out infinite;
}

@keyframes twinkle {
  0%, 100% { opacity: 0.8; }
  50% { opacity: 1; }
}

/* ============================================
   Section 2: Nebula Birth
   ============================================ */
.nebula {
  background: linear-gradient(180deg, var(--void-black) 0%, #1a0a2e 50%, var(--void-black) 100%);
}

.nebula-cloud {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0;
  animation: nebulaReveal linear both;
  animation-timeline: view();
  animation-range: entry 0% cover 50%;
}

.cloud-1 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, var(--nebula-purple) 0%, transparent 70%);
  top: 10%;
  left: 10%;
}

.cloud-2 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--nebula-pink) 0%, transparent 70%);
  top: 30%;
  right: 5%;
  animation-delay: 0.1s;
}

.cloud-3 {
  width: 350px;
  height: 350px;
  background: radial-gradient(circle, var(--nebula-blue) 0%, transparent 70%);
  bottom: 10%;
  left: 30%;
  animation-delay: 0.2s;
}

@keyframes nebulaReveal {
  0% { opacity: 0; transform: scale(0.5); }
  100% { opacity: 0.7; transform: scale(1); }
}

/* Particles */
.particles {
  position: absolute;
  inset: 0;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--star-white);
  border-radius: 50%;
  opacity: 0;
  animation: particleFloat linear both;
  animation-timeline: view();
  animation-range: entry 20% cover 80%;
}

.particle:nth-child(1) { top: 20%; left: 20%; animation-delay: 0s; }
.particle:nth-child(2) { top: 40%; left: 70%; animation-delay: 0.1s; }
.particle:nth-child(3) { top: 60%; left: 30%; animation-delay: 0.2s; }
.particle:nth-child(4) { top: 30%; left: 80%; animation-delay: 0.15s; }
.particle:nth-child(5) { top: 70%; left: 60%; animation-delay: 0.25s; }
.particle:nth-child(6) { top: 50%; left: 40%; animation-delay: 0.05s; }
.particle:nth-child(7) { top: 80%; left: 50%; animation-delay: 0.3s; }
.particle:nth-child(8) { top: 25%; left: 55%; animation-delay: 0.12s; }

@keyframes particleFloat {
  0% {
    opacity: 0;
    transform: translate(0, 0) scale(0);
  }
  50% {
    opacity: 1;
    transform: translate(calc(50vw - 100%), calc(50vh - 100%)) scale(1);
  }
  100% {
    opacity: 0;
    transform: translate(calc(50vw - 50%), calc(50vh - 50%)) scale(0.5);
  }
}

.nebula .content h2 {
  color: var(--nebula-pink);
  text-shadow: 0 0 40px var(--nebula-purple);
}

/* ============================================
   Section 3: Protostar
   ============================================ */
.protostar {
  background: radial-gradient(ellipse at center, #1a1a2e 0%, var(--void-black) 100%);
}

.accretion-disk {
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: conic-gradient(
    from 0deg,
    transparent 0deg,
    var(--star-orange) 30deg,
    var(--star-yellow) 60deg,
    transparent 90deg,
    var(--star-orange) 120deg,
    transparent 150deg,
    var(--star-yellow) 180deg,
    transparent 210deg,
    var(--star-orange) 240deg,
    transparent 270deg,
    var(--star-yellow) 300deg,
    transparent 330deg,
    var(--star-orange) 360deg
  );
  opacity: 0;
  transform: rotateX(75deg) scale(0.5);
  filter: blur(2px);
  animation: diskForm linear both;
  animation-timeline: view();
  animation-range: entry 10% cover 60%;
}

@keyframes diskForm {
  0% { opacity: 0; transform: rotateX(75deg) scale(0.5) rotate(0deg); }
  100% { opacity: 0.8; transform: rotateX(75deg) scale(1.5) rotate(180deg); }
}

.core-glow {
  position: absolute;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--star-white) 0%, var(--star-yellow) 30%, var(--star-orange) 60%, transparent 100%);
  box-shadow: 0 0 60px var(--star-yellow), 0 0 120px var(--star-orange);
  opacity: 0;
  animation: coreIgnite linear both;
  animation-timeline: view();
  animation-range: entry 30% cover 70%;
}

@keyframes coreIgnite {
  0% { opacity: 0; transform: scale(0); }
  50% { opacity: 0.5; transform: scale(0.8); }
  100% { opacity: 1; transform: scale(1); }
}

.matter-streams {
  position: absolute;
  width: 100%;
  height: 100%;
}

.stream {
  position: absolute;
  width: 2px;
  height: 150px;
  background: linear-gradient(to bottom, var(--star-orange), transparent);
  top: 50%;
  left: 50%;
  transform-origin: top center;
  opacity: 0;
  animation: streamFlow linear both;
  animation-timeline: view();
  animation-range: entry 40% cover 80%;
}

.stream:nth-child(1) { transform: rotate(0deg) translateY(-50px); }
.stream:nth-child(2) { transform: rotate(90deg) translateY(-50px); }
.stream:nth-child(3) { transform: rotate(180deg) translateY(-50px); }
.stream:nth-child(4) { transform: rotate(270deg) translateY(-50px); }

@keyframes streamFlow {
  0% { opacity: 0; height: 0; }
  100% { opacity: 0.7; height: 150px; }
}

.protostar .content h2 {
  color: var(--star-orange);
  text-shadow: 0 0 30px var(--star-yellow);
}

/* ============================================
   Section 4: Main Sequence Star
   ============================================ */
.main-sequence {
  background: radial-gradient(ellipse at center, #1a1510 0%, var(--void-black) 100%);
}

.star-body {
  position: absolute;
  width: 200px;
  height: 200px;
}

.photosphere {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: radial-gradient(circle, var(--star-white) 0%, var(--star-yellow) 50%, var(--star-orange) 100%);
  box-shadow:
    0 0 60px var(--star-yellow),
    0 0 120px var(--star-orange),
    inset 0 0 30px rgba(255,255,255,0.5);
  transform: scale(0);
  animation: starShine linear both;
  animation-timeline: view();
  animation-range: entry 0% cover 40%;
}

@keyframes starShine {
  0% { transform: scale(0); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}

.corona {
  position: absolute;
  inset: -50px;
  border-radius: 50%;
  background: radial-gradient(circle, transparent 40%, rgba(255, 212, 59, 0.3) 60%, transparent 80%);
  animation: coronaPulse 4s ease-in-out infinite;
}

@keyframes coronaPulse {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.1); opacity: 0.8; }
}

.solar-flare {
  position: absolute;
  width: 60px;
  height: 20px;
  background: linear-gradient(90deg, var(--star-yellow), transparent);
  border-radius: 50%;
  filter: blur(3px);
  opacity: 0;
  animation: flareErupt 3s ease-in-out infinite;
}

.flare-1 {
  top: 30%;
  right: -20px;
  transform: rotate(-20deg);
}

.flare-2 {
  bottom: 20%;
  left: -20px;
  transform: rotate(160deg);
  animation-delay: 1.5s;
}

@keyframes flareErupt {
  0%, 100% { opacity: 0; transform: scaleX(0.5); }
  50% { opacity: 0.8; transform: scaleX(1.5); }
}

/* Orbiting Planets */
.orbiting-planets {
  position: absolute;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.orbit {
  position: absolute;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  animation: orbitAppear linear both;
  animation-timeline: view();
  animation-range: entry 20% cover 60%;
}

.orbit-1 { width: 300px; height: 300px; }
.orbit-2 { width: 400px; height: 400px; }
.orbit-3 { width: 520px; height: 520px; }

@keyframes orbitAppear {
  0% { opacity: 0; transform: scale(0.5); }
  100% { opacity: 1; transform: scale(1); }
}

.planet {
  position: absolute;
  border-radius: 50%;
  animation: orbitSpin 20s linear infinite;
}

.orbit-1 .planet {
  width: 12px;
  height: 12px;
  background: #8B4513;
  top: -6px;
  left: 50%;
  box-shadow: 0 0 10px rgba(139, 69, 19, 0.5);
}

.orbit-2 .planet {
  width: 20px;
  height: 20px;
  background: linear-gradient(135deg, #4169E1, #1E90FF);
  top: 50%;
  right: -10px;
  box-shadow: 0 0 15px rgba(65, 105, 225, 0.5);
  animation-duration: 30s;
}

.orbit-3 .planet {
  width: 16px;
  height: 16px;
  background: #CD853F;
  bottom: -8px;
  left: 50%;
  box-shadow: 0 0 12px rgba(205, 133, 63, 0.5);
  animation-duration: 45s;
}

@keyframes orbitSpin {
  from { transform: rotate(0deg) translateX(50%) rotate(0deg); }
  to { transform: rotate(360deg) translateX(50%) rotate(-360deg); }
}

.main-sequence .content h2 {
  color: var(--star-yellow);
  text-shadow: 0 0 40px var(--star-orange);
}

/* ============================================
   Section 5: Red Giant
   ============================================ */
.red-giant {
  background: radial-gradient(ellipse at center, #2a1a1a 0%, var(--void-black) 100%);
}

.giant-body {
  position: absolute;
  width: 300px;
  height: 300px;
}

.outer-envelope {
  position: absolute;
  inset: -100px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(220, 53, 69, 0.6) 0%, rgba(220, 53, 69, 0.2) 50%, transparent 70%);
  transform: scale(0);
  animation: envelopeExpand linear both;
  animation-timeline: view();
  animation-range: entry 0% cover 50%;
}

@keyframes envelopeExpand {
  0% { transform: scale(0); opacity: 0; }
  100% { transform: scale(1.5); opacity: 1; }
}

.inner-core {
  position: absolute;
  inset: 50px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--star-white) 0%, var(--star-yellow) 30%, var(--star-orange) 60%, var(--star-red) 100%);
  box-shadow:
    0 0 80px var(--star-red),
    0 0 160px rgba(220, 53, 69, 0.5);
  animation: coreContract linear both;
  animation-timeline: view();
  animation-range: entry 10% cover 60%;
}

@keyframes coreContract {
  0% { transform: scale(1.5); filter: brightness(0.5); }
  100% { transform: scale(1); filter: brightness(1.5); }
}

.pulsation {
  position: absolute;
  inset: -150px;
  border-radius: 50%;
  border: 2px solid rgba(220, 53, 69, 0.3);
  animation: pulsate 3s ease-in-out infinite;
}

@keyframes pulsate {
  0%, 100% { transform: scale(0.8); opacity: 0.3; }
  50% { transform: scale(1.2); opacity: 0.6; }
}

.ash-ring {
  position: absolute;
  width: 500px;
  height: 500px;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  border: 30px solid transparent;
  border-top-color: rgba(139, 69, 19, 0.3);
  border-right-color: rgba(139, 69, 19, 0.2);
  opacity: 0;
  animation: ashAppear linear both;
  animation-timeline: view();
  animation-range: entry 30% cover 70%;
}

@keyframes ashAppear {
  0% { opacity: 0; transform: translate(-50%, -50%) rotate(0deg); }
  100% { opacity: 1; transform: translate(-50%, -50%) rotate(45deg); }
}

.red-giant .content h2 {
  color: var(--star-red);
  text-shadow: 0 0 40px var(--star-orange);
}

/* ============================================
   Section 6: Supernova
   ============================================ */
.supernova {
  background: var(--void-black);
}

.explosion {
  position: absolute;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.shockwave {
  position: absolute;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  border: 3px solid var(--supernova-gold);
  opacity: 0;
  animation: shockwaveExpand linear both;
  animation-timeline: view();
  animation-range: entry 20% cover 80%;
}

.shockwave.delay-1 {
  animation-range: entry 30% cover 85%;
  border-color: var(--star-orange);
}

.shockwave.delay-2 {
  animation-range: entry 40% cover 90%;
  border-color: var(--star-red);
}

@keyframes shockwaveExpand {
  0% {
    transform: scale(0);
    opacity: 1;
    border-width: 20px;
  }
  100% {
    transform: scale(20);
    opacity: 0;
    border-width: 1px;
  }
}

.core-collapse {
  position: absolute;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--star-white) 0%, var(--supernova-gold) 30%, var(--star-orange) 60%, transparent 100%);
  box-shadow:
    0 0 100px var(--supernova-gold),
    0 0 200px var(--star-orange),
    0 0 300px var(--star-red);
  animation: coreFlash linear both;
  animation-timeline: view();
  animation-range: entry 10% cover 60%;
}

@keyframes coreFlash {
  0% { transform: scale(1); filter: brightness(1); }
  30% { transform: scale(3); filter: brightness(5); }
  100% { transform: scale(0.1); filter: brightness(0.5); }
}

.debris {
  position: absolute;
  width: 100%;
  height: 100%;
}

.fragment {
  position: absolute;
  width: 8px;
  height: 8px;
  background: var(--supernova-gold);
  border-radius: 50%;
  top: 50%;
  left: 50%;
  opacity: 0;
  animation: fragmentFly linear both;
  animation-timeline: view();
  animation-range: entry 25% cover 90%;
}

.fragment:nth-child(1) { --angle: 0deg; --distance: 40vw; background: gold; }
.fragment:nth-child(2) { --angle: 30deg; --distance: 35vw; background: silver; }
.fragment:nth-child(3) { --angle: 60deg; --distance: 45vw; background: #B87333; }
.fragment:nth-child(4) { --angle: 90deg; --distance: 38vw; background: gold; }
.fragment:nth-child(5) { --angle: 120deg; --distance: 42vw; background: #E5E4E2; }
.fragment:nth-child(6) { --angle: 150deg; --distance: 36vw; background: gold; }
.fragment:nth-child(7) { --angle: 180deg; --distance: 44vw; background: silver; }
.fragment:nth-child(8) { --angle: 210deg; --distance: 39vw; background: #B87333; }
.fragment:nth-child(9) { --angle: 240deg; --distance: 41vw; background: gold; }
.fragment:nth-child(10) { --angle: 270deg; --distance: 37vw; background: #E5E4E2; }
.fragment:nth-child(11) { --angle: 300deg; --distance: 43vw; background: silver; }
.fragment:nth-child(12) { --angle: 330deg; --distance: 40vw; background: gold; }

@keyframes fragmentFly {
  0% {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(var(--angle)) translateY(0);
  }
  20% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(var(--angle)) translateY(calc(-1 * var(--distance)));
  }
}

.supernova .content {
  z-index: 20;
}

.supernova .content h2 {
  color: var(--supernova-gold);
  text-shadow: 0 0 60px var(--star-orange);
}

/* ============================================
   Section 7: Legacy
   ============================================ */
.legacy {
  background: linear-gradient(180deg, var(--void-black) 0%, #0a1520 50%, var(--void-black) 100%);
  flex-direction: column;
}

.remnant-nebula {
  position: absolute;
  width: 100%;
  height: 100%;
}

.gas-shell {
  position: absolute;
  border-radius: 50%;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  opacity: 0;
  animation: shellExpand linear both;
  animation-timeline: view();
  animation-range: entry 0% cover 60%;
}

.shell-1 {
  width: 400px;
  height: 400px;
  background: radial-gradient(ellipse, transparent 30%, var(--remnant-teal) 50%, transparent 70%);
  filter: blur(20px);
}

.shell-2 {
  width: 500px;
  height: 500px;
  background: radial-gradient(ellipse, transparent 40%, var(--remnant-blue) 55%, transparent 70%);
  filter: blur(30px);
  animation-range: entry 10% cover 65%;
}

.shell-3 {
  width: 600px;
  height: 600px;
  background: radial-gradient(ellipse, transparent 45%, var(--nebula-pink) 58%, transparent 70%);
  filter: blur(40px);
  animation-range: entry 20% cover 70%;
}

@keyframes shellExpand {
  0% { opacity: 0; transform: translate(-50%, -50%) scale(0.3); }
  100% { opacity: 0.6; transform: translate(-50%, -50%) scale(1); }
}

.neutron-star {
  position: absolute;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--star-white);
  box-shadow:
    0 0 20px var(--star-white),
    0 0 40px var(--remnant-teal),
    0 0 60px var(--remnant-blue);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: neutronPulse 0.5s ease-in-out infinite, neutronAppear linear both;
  animation-timeline: view();
  animation-range: entry 30% cover 50%;
}

@keyframes neutronPulse {
  0%, 100% { box-shadow: 0 0 20px var(--star-white), 0 0 40px var(--remnant-teal); }
  50% { box-shadow: 0 0 30px var(--star-white), 0 0 60px var(--remnant-teal), 0 0 80px var(--remnant-blue); }
}

@keyframes neutronAppear {
  0% { opacity: 0; transform: translate(-50%, -50%) scale(0); }
  100% { opacity: 1; transform: translate(-50%, -50%) scale(1); }
}

.new-stars {
  position: absolute;
  width: 100%;
  height: 100%;
}

.baby-star {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--star-white), var(--star-yellow));
  box-shadow: 0 0 20px var(--star-yellow);
  opacity: 0;
  animation: babyStarBirth linear both;
  animation-timeline: view();
  animation-range: entry 50% cover 90%;
}

.baby-star:nth-child(1) { top: 20%; left: 25%; }
.baby-star:nth-child(2) { top: 70%; right: 20%; animation-range: entry 55% cover 92%; }
.baby-star:nth-child(3) { bottom: 25%; left: 35%; animation-range: entry 60% cover 95%; }

@keyframes babyStarBirth {
  0% { opacity: 0; transform: scale(0); }
  50% { opacity: 1; transform: scale(1.5); }
  100% { opacity: 0.8; transform: scale(1); }
}

.legacy .content h2 {
  color: var(--remnant-teal);
  text-shadow: 0 0 40px var(--remnant-blue);
}

/* Credits */
.credits {
  position: absolute;
  bottom: 2rem;
  text-align: center;
  opacity: 0;
  animation: creditsAppear linear both;
  animation-timeline: view();
  animation-range: entry 70% cover 100%;
}

@keyframes creditsAppear {
  0% { opacity: 0; transform: translateY(20px); }
  100% { opacity: 0.6; transform: translateY(0); }
}

.credits p {
  font-size: 0.875rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.credits .tech {
  margin-top: 0.5rem;
  font-size: 0.75rem;
  opacity: 0.5;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
  .content {
    padding: 1rem;
    max-width: 90%;
  }

  .void .title {
    letter-spacing: 0.15em;
  }

  .nebula-cloud {
    filter: blur(40px);
  }

  .cloud-1 { width: 250px; height: 250px; }
  .cloud-2 { width: 300px; height: 300px; }
  .cloud-3 { width: 200px; height: 200px; }

  .accretion-disk { width: 200px; height: 200px; }
  .core-glow { width: 50px; height: 50px; }

  .photosphere { width: 120px; height: 120px; }
  .orbit-1 { width: 200px; height: 200px; }
  .orbit-2 { width: 280px; height: 280px; }
  .orbit-3 { width: 360px; height: 360px; }

  .giant-body { width: 200px; height: 200px; }
  .outer-envelope { inset: -60px; }

  .shell-1 { width: 280px; height: 280px; }
  .shell-2 { width: 350px; height: 350px; }
  .shell-3 { width: 420px; height: 420px; }
}

@media (max-width: 480px) {
  .content h2 {
    font-size: 1.75rem;
  }

  .content p {
    font-size: 0.95rem;
    line-height: 1.6;
  }

  .orbit-3 {
    display: none;
  }

  .ash-ring {
    width: 300px;
    height: 300px;
  }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  .scroll-container {
    scroll-behavior: auto;
  }

  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}