* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  color: #3a3a3a;
  font-family: 'Courier New', Consolas, monospace;
  font-size: 15px;
  line-height: 1.7;
  padding: 20px;
  transition: background 0.8s, color 0.8s;
}
.theme-primitive { background: #f7f3ee; }
.theme-ancient { background: #f0eadd; }
.theme-classical { background: #eae5dd; }
.theme-medieval { background: #ede4d6; }
.theme-industrial { background: #e5e3e0; }
.theme-modern { background: #e0e5ed; }
.theme-digital { background: #dce0ed; }
.theme-future { background: #1a1a2e; color: #c0c0d0; }
.theme-cosmic { background: #0d0d1a; color: #a0a0c0; }
.theme-future #lang-toggle, .theme-cosmic #lang-toggle { border-color: #333; color: #888; }
.theme-future #lang-toggle:hover, .theme-cosmic #lang-toggle:hover { color: #ddd; background: #222; }
.theme-future #era, .theme-cosmic #era { background: rgba(255,255,255,0.04); border-color: #333; }

.theme-future #story .story-detail, .theme-cosmic #story .story-detail { color: #b0b0c0; }
.theme-future .story-timeline, .theme-cosmic .story-timeline { border-color: #222; }
.theme-future .story-past-era, .theme-cosmic .story-past-era { color: #666; }
.theme-future #log, .theme-cosmic #log { border-color: #222; }
.theme-future .action-btn, .theme-cosmic .action-btn { background: rgba(255,255,255,0.06); border-color: #333; color: #c0c0d0; }
.theme-future .action-btn:hover:not(:disabled), .theme-cosmic .action-btn:hover:not(:disabled) { background: rgba(255,255,255,0.1); border-color: #555; }
.theme-future .action-btn:disabled, .theme-cosmic .action-btn:disabled { color: #444; border-color: #222; }
.theme-future #header, .theme-cosmic #header { border-color: #222; }
#game {
  max-width: 680px;
  margin: 0 auto;
}
#header {
  border-bottom: 1px solid #ddd8d0;
  padding-bottom: 12px;
  margin-bottom: 14px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}
#lang-toggle {
  cursor: pointer;
  color: #888;
  font-size: 13px;
  user-select: none;
  padding: 2px 8px;
  border: 1px solid #ddd8d0;
  border-radius: 3px;
}
#lang-toggle:hover { color: #3a3a3a; background: #f0ece6; }
.auto-toggle {
  cursor: pointer;
  color: #888;
  font-size: 13px;
  user-select: none;
  padding: 2px 8px;
  border: 1px solid #ddd8d0;
  border-radius: 3px;
  background: none;
  font-family: inherit;
  margin-right: 10px;
  vertical-align: middle;
}
.auto-toggle:hover { color: #3a3a3a; background: #f0ece6; }
.auto-toggle.active { color: #27ae60; border-color: #27ae60; background: #eafaf1; }
.theme-future .auto-toggle, .theme-cosmic .auto-toggle { border-color: #333; color: #888; }
.theme-future .auto-toggle:hover, .theme-cosmic .auto-toggle:hover { color: #ddd; background: #222; }
.theme-future .auto-toggle.active, .theme-cosmic .auto-toggle.active { color: #27ae60; border-color: #27ae60; background: rgba(39,174,96,0.1); }
.auto-indicator {
  width: 100%;
  text-align: center;
  padding: 16px 0;
  color: #27ae60;
  font-size: 14px;
}
#resources {
  text-align: right;
  font-size: 14px;
  line-height: 1.9;
}
.resource { display: inline-block; margin-left: 14px; }
.resource span { color: #b8860b; font-weight: bold; }

#era {
  background: #faf8f5;
  border: 1px solid #e8e4df;
  border-radius: 4px;
  padding: 10px 14px;
  margin-bottom: 12px;
}
.era-header { margin-bottom: 4px; }
.era-emoji { font-size: 20px; margin-right: 6px; }
.era-name { font-size: 16px; font-weight: bold; color: #b8860b; }
.era-era { font-size: 12px; color: #999; margin-left: 8px; }
.era-year { font-size: 12px; color: #aaa; margin-left: 4px; }

.era-bar { height: 3px; background: #e8e4df; border-radius: 2px; margin-top: 4px; overflow: hidden; }
.era-bar-fill { height: 100%; background: #b8860b; border-radius: 2px; transition: width 0.3s; }

#story {
  margin-bottom: 14px;
  min-height: 60px;
  font-size: 14px;
  line-height: 1.8;
}
#story p { margin-bottom: 8px; font-size: 14px; line-height: 1.8; }
.story-current { margin-bottom: 12px; }
.story-era-name { font-size: 15px; color: #b8860b; display: block; margin-bottom: 6px; }
.story-detail { color: #555; font-size: 14px; line-height: 1.8; }
.story-timeline { border-top: 1px solid #e0dcd6; padding-top: 8px; }
.story-timeline-label { font-size: 12px; color: #bbb; display: block; margin-bottom: 4px; }
.story-past-era { display: inline-block; font-size: 12px; color: #999; margin-right: 10px; }
.highlight { color: #b8860b; }
.danger { color: #c0392b; }
.success { color: #27ae60; }
.muted { color: #999; }

#buildings-info {
  margin: 6px 0;
  font-size: 0;
  line-height: 1.8;
}
.building-tag {
  display: inline;
  font-size: 13px;
  padding: 0 3px;
  color: #888;
}
.building-tag.clickable { color: #3a3a3a; cursor: pointer; }
.building-tag.clickable:hover { color: #b8860b; }

#actions {
  margin: 12px 0 8px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.action-btn {
  position: relative;
  background: #fff;
  -webkit-tap-highlight-color: transparent;
  outline: none;
  border: 1px solid #d4cfc9;
  color: #3a3a3a;
  padding: 7px 14px;
  cursor: pointer;
  font-family: inherit;
  font-size: 13px;
  border-radius: 3px;
  transition: background 0.15s, border-color 0.15s;
  white-space: nowrap;
}
@media (hover: hover) {
  .action-btn:hover:not(:disabled) {
    background: #f0ece6;
    border-color: #bbb;
  }
}
.action-btn:disabled {
  color: #ccc;
  cursor: not-allowed;
  border-color: #e8e4df;
}
.action-btn.cooldown { color: #bbb; }
.action-btn .btn-progress {
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 100%;
  background: #e8e0d6;
  pointer-events: none;
  z-index: 0;
  transition: none;
}
.action-btn .btn-label { position: relative; z-index: 1; }
.action-btn[data-cost]:hover::after {
  content: attr(data-cost);
  position: absolute;
  bottom: calc(100% + 4px);
  left: 50%;
  transform: translateX(-50%);
  background: #333;
  color: #fff;
  font-size: 12px;
  padding: 3px 8px;
  border-radius: 3px;
  white-space: nowrap;
  z-index: 10;
  pointer-events: none;
}

.branch-header {
  width: 100%;
  margin-bottom: 8px;
  font-size: 14px;
}
.branch-header p {
  color: #888;
  font-size: 13px;
  margin-top: 2px;
}
.branch-card {
  background: #fff;
  border: 1px solid #d4cfc9;
  border-radius: 4px;
  padding: 10px 14px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  width: calc(50% - 4px);
  min-width: 200px;
  flex: 1 1 auto;
}
.branch-card:hover {
  background: #f0ece6;
  border-color: #bbb;
}
.branch-card:active {
  background: #e5ded5;
}
.branch-choice-title {
  font-size: 15px;
  font-weight: bold;
  color: #3a3a3a;
  margin-bottom: 3px;
}
.branch-choice-bonus {
  font-size: 12px;
  color: #b8860b;
  margin-bottom: 4px;
}
.branch-choice-desc {
  font-size: 12px;
  color: #666;
  margin-bottom: 6px;
  line-height: 1.5;
}
.branch-choice-preview {
  font-size: 12px;
  color: #999;
}
.branch-badge {
  display: inline-block;
  font-size: 11px;
  background: #b8860b;
  color: #fff;
  padding: 0 6px;
  border-radius: 3px;
  margin-left: 6px;
  vertical-align: middle;
  line-height: 1.6;
}

#log {
  border-top: 1px solid #ddd8d0;
  margin-top: 14px;
  padding-top: 8px;
  max-height: 200px;
  overflow-y: auto;
  font-size: 13px;
  color: #888;
}
#log p { margin-bottom: 2px; }

.era-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #0a0a12;
  transition: opacity 0.8s ease;
}
.era-overlay.hidden { display: none; }
.era-overlay.fade-out { opacity: 0; pointer-events: none; }
.era-overlay-particles {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  overflow: hidden;
}
.era-overlay-deco {
  position: absolute;
  pointer-events: none;
}
.era-overlay-content {
  text-align: center;
  z-index: 2;
  animation: contentAppear 0.6s ease-out;
}
@keyframes contentAppear {
  from { transform: scale(0.5); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}
.era-overlay-emoji {
  font-size: 80px;
  line-height: 1;
  margin-bottom: 20px;
  position: relative;
  z-index: 2;
}
.era-overlay-name {
  font-size: 28px;
  font-weight: bold;
  margin-bottom: 8px;
  letter-spacing: 2px;
}
.era-overlay-era {
  font-size: 16px;
  letter-spacing: 1px;
}

/* ── EMBER: fire, pottery, gunpowder, thermodynamics, atomic ── */
.at-ember .era-overlay { background: #1a0800; }
.at-ember .era-overlay-name { color: #ff6b35; text-shadow: 0 0 20px rgba(255,107,53,0.4); }
.at-ember .era-overlay-era { color: #aa6644; }
.at-ember .era-p {
  position: absolute;
  border-radius: 50%;
  animation: emberRise linear infinite;
}
@keyframes emberRise {
  0% { transform: translateY(0) scale(1); opacity: 0.9; }
  50% { opacity: 1; }
  100% { transform: translateY(-100vh) scale(0.2); opacity: 0; }
}
.at-ember .era-deco-glow {
  position: absolute;
  bottom: -10%;
  left: 50%;
  transform: translateX(-50%);
  width: 120%;
  height: 40%;
  background: radial-gradient(ellipse at center bottom, rgba(255,80,20,0.15) 0%, transparent 70%);
  animation: glowPulse 2s ease-in-out infinite alternate;
}
@keyframes glowPulse {
  from { opacity: 0.6; }
  to { opacity: 1; }
}

/* ── ROCK: stone_tools, roads, concrete ── */
.at-rock .era-overlay { background: #12100e; }
.at-rock .era-overlay-name { color: #a09080; text-shadow: 0 0 15px rgba(160,144,128,0.3); }
.at-rock .era-overlay-era { color: #706050; }
.at-rock .era-p {
  position: absolute;
  animation: rockFloat 4s ease-in-out infinite;
}
@keyframes rockFloat {
  0%, 100% { transform: translateY(0) rotate(0deg); opacity: 0.5; }
  25% { transform: translateY(-20px) rotate(5deg); opacity: 0.7; }
  50% { transform: translateY(-10px) rotate(-3deg); opacity: 0.6; }
  75% { transform: translateY(-25px) rotate(8deg); opacity: 0.8; }
}
.at-rock .era-deco-crack {
  position: absolute;
  background: rgba(160,144,128,0.1);
  animation: crackGrow 3s ease-out forwards;
}
@keyframes crackGrow {
  from { transform: scaleX(0); opacity: 0; }
  to { transform: scaleX(1); opacity: 1; }
}

/* ── WAVE: canoe, fishing, navigation, steamship ── */
.at-wave .era-overlay { background: #060d18; }
.at-wave .era-overlay-name { color: #4fc3f7; text-shadow: 0 0 20px rgba(79,195,247,0.3); }
.at-wave .era-overlay-era { color: #4477aa; }
.at-wave .era-p {
  position: absolute;
  border-radius: 50%;
  background: rgba(79,195,247,0.4);
  animation: waveFloat 3s ease-in-out infinite;
}
@keyframes waveFloat {
  0%, 100% { transform: translateY(0) scale(1); opacity: 0.3; }
  50% { transform: translateY(-30px) scale(1.3); opacity: 0.7; }
}
.at-wave .era-deco-ripple {
  position: absolute;
  border: 1px solid rgba(79,195,247,0.2);
  border-radius: 50%;
  animation: rippleExpand 2.5s ease-out infinite;
}
@keyframes rippleExpand {
  from { transform: scale(0.3); opacity: 0.8; }
  to { transform: scale(2.5); opacity: 0; }
}

/* ── VINE: agriculture, gathering, wolf_taming, fishing ── */
.at-vine .era-overlay { background: #0a1208; }
.at-vine .era-overlay-name { color: #66bb6a; text-shadow: 0 0 20px rgba(102,187,106,0.3); }
.at-vine .era-overlay-era { color: #4a8a4e; }
.at-vine .era-p {
  position: absolute;
  animation: vineGrow 3.5s ease-out infinite;
}
@keyframes vineGrow {
  0% { transform: translateY(40px) scale(0.5) rotate(-10deg); opacity: 0; }
  30% { opacity: 0.8; }
  100% { transform: translateY(-60px) scale(1) rotate(10deg); opacity: 0; }
}
.at-vine .era-deco-leaf {
  position: absolute;
  font-size: 20px;
  animation: leafSway 4s ease-in-out infinite;
}
@keyframes leafSway {
  0%, 100% { transform: rotate(-15deg) translateY(0); }
  50% { transform: rotate(15deg) translateY(-15px); }
}

/* ── SPARK: smelting, bronze_age, iron_tools, electricity ── */
.at-spark .era-overlay { background: #120a02; }
.at-spark .era-overlay-name { color: #ffa726; text-shadow: 0 0 20px rgba(255,167,38,0.4); }
.at-spark .era-overlay-era { color: #aa7733; }
.at-spark .era-p {
  position: absolute;
  border-radius: 50%;
  animation: sparkFly 1.5s ease-out infinite;
}
@keyframes sparkFly {
  0% { transform: translate(0,0) scale(1); opacity: 1; }
  100% { transform: translate(var(--dx), var(--dy)) scale(0); opacity: 0; }
}
.at-spark .era-deco-anvil {
  position: absolute;
  bottom: 15%;
  left: 50%;
  transform: translateX(-50%);
  font-size: 40px;
  opacity: 0.15;
  animation: anvilGlow 1.5s ease-in-out infinite alternate;
}
@keyframes anvilGlow {
  from { filter: brightness(0.8); }
  to { filter: brightness(1.5); }
}

/* ── INK: language, writing, papermaking, printing, telegraph, internet ── */
.at-ink .era-overlay { background: #0a0a12; }
.at-ink .era-overlay-name { color: #ce93d8; text-shadow: 0 0 20px rgba(206,147,216,0.3); }
.at-ink .era-overlay-era { color: #8866aa; }
.at-ink .era-p {
  position: absolute;
  border-radius: 50%;
  animation: inkDrop 2s ease-in infinite;
}
@keyframes inkDrop {
  0% { transform: scale(0); opacity: 0; }
  30% { transform: scale(1.2); opacity: 0.8; }
  100% { transform: scale(2); opacity: 0; }
}
.at-ink .era-deco-char {
  position: absolute;
  font-size: 24px;
  opacity: 0.12;
  animation: charFloat 5s ease-in-out infinite;
}
@keyframes charFloat {
  0%, 100% { transform: translateY(0) rotate(0deg); opacity: 0.08; }
  50% { transform: translateY(-20px) rotate(5deg); opacity: 0.15; }
}

/* ── ARCH: city_states, philosophy, renaissance ── */
.at-arch .era-overlay { background: #100e14; }
.at-arch .era-overlay-name { color: #b0bec5; text-shadow: 0 0 20px rgba(176,190,197,0.3); }
.at-arch .era-overlay-era { color: #778899; }
.at-arch .era-p {
  position: absolute;
  animation: columnRise 3s ease-out infinite;
}
@keyframes columnRise {
  0% { transform: translateY(60px) scaleY(0.5); opacity: 0; }
  50% { opacity: 0.6; }
  100% { transform: translateY(-20px) scaleY(1); opacity: 0; }
}
.at-arch .era-deco-arch {
  position: absolute;
  border: 2px solid rgba(176,190,197,0.1);
  border-radius: 50% 50% 0 0;
  animation: archGlow 3s ease-in-out infinite alternate;
}
@keyframes archGlow {
  from { border-color: rgba(176,190,197,0.05); }
  to { border-color: rgba(176,190,197,0.15); }
}

/* ── PAGE: compass, navigation, telescope, printing, discovery ── */
.at-page .era-overlay { background: #0e0c08; }
.at-page .era-overlay-name { color: #d4a574; text-shadow: 0 0 20px rgba(212,165,116,0.3); }
.at-page .era-overlay-era { color: #997755; }
.at-page .era-p {
  position: absolute;
  background: rgba(212,165,116,0.15);
  border: 1px solid rgba(212,165,116,0.1);
  animation: pageFloat 4s ease-in-out infinite;
}
@keyframes pageFloat {
  0% { transform: translateY(0) rotateY(0deg) rotateX(10deg); opacity: 0.3; }
  50% { transform: translateY(-30px) rotateY(180deg) rotateX(-10deg); opacity: 0.6; }
  100% { transform: translateY(0) rotateY(360deg) rotateX(10deg); opacity: 0.3; }
}

/* ── GEAR: steam, automobile, factory, railroad ── */
.at-gear .era-overlay { background: #0c0a08; }
.at-gear .era-overlay-name { color: #78909c; text-shadow: 0 0 20px rgba(120,144,156,0.3); }
.at-gear .era-overlay-era { color: #556677; }
.at-gear .era-p {
  position: absolute;
  animation: gearSpin 4s linear infinite;
}
@keyframes gearSpin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
.at-gear .era-deco-smoke {
  position: absolute;
  border-radius: 50%;
  background: rgba(200,200,200,0.06);
  animation: smokeRise 4s ease-out infinite;
}
@keyframes smokeRise {
  0% { transform: translateY(0) scale(0.5); opacity: 0.4; }
  100% { transform: translateY(-200px) scale(3); opacity: 0; }
}

/* ── CIRCUIT: computer, dna, nanotech, bci, quantum ── */
.at-circuit .era-overlay { background: #060a14; }
.at-circuit .era-overlay-name { color: #4dd0e1; text-shadow: 0 0 20px rgba(77,208,225,0.4); }
.at-circuit .era-overlay-era { color: #3399aa; }
.at-circuit .era-p {
  position: absolute;
  border-radius: 50%;
  animation: circuitPulse 2s ease-in-out infinite;
}
@keyframes circuitPulse {
  0%, 100% { transform: scale(1); opacity: 0.3; box-shadow: 0 0 5px currentColor; }
  50% { transform: scale(1.5); opacity: 0.8; box-shadow: 0 0 15px currentColor; }
}
.at-circuit .era-deco-line {
  position: absolute;
  height: 1px;
  animation: lineScan 2s linear infinite;
}
@keyframes lineScan {
  from { transform: translateX(-100%); opacity: 0; }
  50% { opacity: 0.5; }
  to { transform: translateX(200%); opacity: 0; }
}

/* ── STAR: spaceflight, interstellar, matrioshka, kardashev ── */
.at-star .era-overlay { background: #020208; }
.at-star .era-overlay-name { color: #e8eaf6; text-shadow: 0 0 25px rgba(232,234,246,0.4); }
.at-star .era-overlay-era { color: #7788bb; }
.at-star .era-p {
  position: absolute;
  border-radius: 50%;
  animation: starTwinkle 3s ease-in-out infinite;
}
@keyframes starTwinkle {
  0%, 100% { transform: scale(0.8); opacity: 0.3; }
  50% { transform: scale(1.2); opacity: 1; }
}
.at-star .era-deco-nebula {
  position: absolute;
  border-radius: 50%;
  filter: blur(40px);
  animation: nebulaDrift 8s ease-in-out infinite alternate;
}
@keyframes nebulaDrift {
  from { transform: translate(0,0) scale(1); }
  to { transform: translate(30px,-20px) scale(1.2); }
}

/* ── VOID: dimension, multiverse, transcendence, stargate ── */
.at-void .era-overlay { background: #020008; }
.at-void .era-overlay-name { color: #b388ff; text-shadow: 0 0 30px rgba(179,136,255,0.5); }
.at-void .era-overlay-era { color: #7744cc; }
.at-void .era-p {
  position: absolute;
  border-radius: 50%;
  animation: voidSwirl 5s linear infinite;
}
@keyframes voidSwirl {
  0% { transform: rotate(0deg) translateX(80px) scale(0.5); opacity: 0.3; }
  50% { opacity: 0.8; }
  100% { transform: rotate(360deg) translateX(80px) scale(0.5); opacity: 0.3; }
}
.at-void .era-deco-ring {
  position: absolute;
  border: 1px solid rgba(179,136,255,0.15);
  border-radius: 50%;
  animation: ringExpand 3s ease-out infinite;
}
@keyframes ringExpand {
  from { transform: scale(0.2); opacity: 0.6; }
  to { transform: scale(3); opacity: 0; }
}
.at-void .era-overlay-emoji { animation: voidPulse 2s ease-in-out infinite alternate; }
@keyframes voidPulse {
  from { transform: scale(1) rotate(0deg); filter: hue-rotate(0deg) drop-shadow(0 0 20px rgba(179,136,255,0.4)); }
  to { transform: scale(1.15) rotate(5deg); filter: hue-rotate(30deg) drop-shadow(0 0 40px rgba(179,136,255,0.8)); }
}

/* ══════════════════════════════════════════════════════════════
   ERA SCENES - Unique natural element animations per era
   Each era has 3+ unique visual scenes
   ══════════════════════════════════════════════════════════════ */

/* ── PRIMITIVE ERA SCENES ── */
/* Scene 1: Campfire flames (keep for primitive) */
.fire-scene-campfire {
  position: absolute;
  bottom: 15%;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 100px;
  background: radial-gradient(ellipse at center bottom, rgba(255,100,0,0.4) 0%, rgba(255,60,0,0.2) 40%, transparent 70%);
  animation: campfireFlicker 0.8s ease-in-out infinite alternate;
}
.fire-scene-campfire::before,
.fire-scene-campfire::after {
  content: '';
  position: absolute;
  bottom: 0;
  border-radius: 50% 50% 20% 20%;
  background: linear-gradient(0deg, rgba(255,150,0,0.9), rgba(255,80,0,0.6), rgba(255,40,0,0.1));
}
.fire-scene-campfire::before {
  left: 30%;
  width: 40%;
  height: 70%;
  animation: flameLeft 0.6s ease-in-out infinite alternate;
}
.fire-scene-campfire::after {
  left: 45%;
  width: 30%;
  height: 85%;
  animation: flameRight 0.5s ease-in-out infinite alternate;
}
@keyframes campfireFlicker {
  0% { filter: brightness(0.9) blur(1px); }
  100% { filter: brightness(1.1) blur(0.5px); }
}
@keyframes flameLeft {
  0% { transform: scaleY(0.8) skewX(-5deg); opacity: 0.8; }
  100% { transform: scaleY(1.1) skewX(5deg); opacity: 1; }
}
@keyframes flameRight {
  0% { transform: scaleY(1) skewX(3deg); opacity: 0.9; }
  100% { transform: scaleY(0.85) skewX(-3deg); opacity: 0.7; }
}

/* Scene 2: Floating leaves */
.era-scene-leaves {
  position: absolute;
  inset: 0;
  overflow: hidden;
}
.era-leaf {
  position: absolute;
  font-size: 24px;
  animation: leafFloat 4s ease-in-out infinite;
}
@keyframes leafFloat {
  0% { transform: translateY(0) translateX(0) rotate(0deg); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { transform: translateY(100vh) translateX(var(--drift)) rotate(360deg); opacity: 0; }
}

/* Scene 3: Fireflies */
.era-scene-fireflies {
  position: absolute;
  inset: 0;
}
.era-firefly {
  position: absolute;
  width: 6px;
  height: 6px;
  background: radial-gradient(circle, #ffff00, #ffcc00);
  border-radius: 50%;
  box-shadow: 0 0 10px #ffff00, 0 0 20px #ffcc00;
  animation: fireflyFloat 3s ease-in-out infinite;
}
@keyframes fireflyFloat {
  0%, 100% { transform: translate(0, 0); opacity: 0.3; }
  25% { transform: translate(var(--dx), var(--dy)); opacity: 1; }
  50% { transform: translate(calc(var(--dx) * -1), var(--dy)); opacity: 0.5; }
  75% { transform: translate(var(--dx), calc(var(--dy) * -1)); opacity: 1; }
}

/* ── ANCIENT ERA SCENES ── */
/* Scene 1: Growing wheat */
.era-scene-wheat {
  position: absolute;
  bottom: 10%;
  left: 0;
  right: 0;
  height: 60%;
}
.era-wheat-stalk {
  position: absolute;
  bottom: 0;
  width: 3px;
  background: linear-gradient(0deg, #8B7355, #D4A574);
  border-radius: 2px;
  animation: wheatSway 2s ease-in-out infinite;
  transform-origin: bottom center;
}
.era-wheat-stalk::before {
  content: '🌾';
  position: absolute;
  top: -20px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 20px;
}
@keyframes wheatSway {
  0%, 100% { transform: rotate(-5deg); }
  50% { transform: rotate(5deg); }
}

/* Scene 2: Pottery wheel */
.era-scene-pottery {
  position: absolute;
  bottom: 20%;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 100px;
}
.era-scene-pottery::before {
  content: '🏺';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 60px;
  animation: potterySpin 4s linear infinite;
}
.era-scene-pottery::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 10px;
  background: #8B4513;
  border-radius: 50%;
  animation: potteryPulse 1s ease-in-out infinite;
}
@keyframes potterySpin {
  0% { transform: translate(-50%, -50%) rotateY(0deg); }
  100% { transform: translate(-50%, -50%) rotateY(360deg); }
}
@keyframes potteryPulse {
  0%, 100% { transform: translateX(-50%) scaleX(1); }
  50% { transform: translateX(-50%) scaleX(1.1); }
}

/* Scene 3: Ritual circle */
.era-scene-ritual {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 150px;
  height: 150px;
  border: 3px solid rgba(255,215,0,0.5);
  border-radius: 50%;
  animation: ritualGlow 2s ease-in-out infinite;
}
.era-scene-ritual::before {
  content: '🔮';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 40px;
  animation: ritualPulse 1.5s ease-in-out infinite;
}
@keyframes ritualGlow {
  0%, 100% { box-shadow: 0 0 20px rgba(255,215,0,0.3); }
  50% { box-shadow: 0 0 40px rgba(255,215,0,0.6); }
}
@keyframes ritualPulse {
  0%, 100% { transform: translate(-50%, -50%) scale(1); }
  50% { transform: translate(-50%, -50%) scale(1.2); }
}

/* ── CLASSICAL ERA SCENES ── */
/* Scene 1: Metallic shimmer */
.era-scene-shimmer {
  position: absolute;
  inset: 0;
}
.era-shimmer-spark {
  position: absolute;
  background: linear-gradient(135deg, #c0c0c0, #ffd700);
  border-radius: 50%;
  animation: shimmerPulse 1.5s ease-in-out infinite;
}
@keyframes shimmerPulse {
  0%, 100% { transform: scale(0.5); opacity: 0.3; }
  50% { transform: scale(1.2); opacity: 1; }
}

/* Scene 2: Olive branches */
.era-scene-olive {
  position: absolute;
  inset: 0;
}
.era-olive-branch {
  position: absolute;
  font-size: 28px;
  animation: oliveSway 3s ease-in-out infinite;
}
@keyframes oliveSway {
  0%, 100% { transform: rotate(-10deg) translateY(0); }
  50% { transform: rotate(10deg) translateY(-10px); }
}

/* Scene 3: Scroll unfurling */
.era-scene-scroll {
  position: absolute;
  top: 30%;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 80px;
}
.era-scene-scroll::before {
  content: '📜';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 50px;
  animation: scrollUnfurl 2s ease-in-out infinite;
}
@keyframes scrollUnfurl {
  0%, 100% { transform: translate(-50%, -50%) scaleX(1); }
  50% { transform: translate(-50%, -50%) scaleX(1.2); }
}

/* ── MEDIEVAL ERA SCENES ── */
/* Scene 1: Castle towers */
.era-scene-castle {
  position: absolute;
  bottom: 10%;
  left: 50%;
  transform: translateX(-50%);
  width: 200px;
  height: 150px;
}
.era-scene-castle::before {
  content: '🏰';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  font-size: 80px;
  animation: castleRise 3s ease-out forwards;
}
@keyframes castleRise {
  0% { transform: translateX(-50%) translateY(50px); opacity: 0; }
  100% { transform: translateX(-50%) translateY(0); opacity: 1; }
}

/* Scene 2: Waving banners */
.era-scene-banners {
  position: absolute;
  top: 15%;
  left: 0;
  right: 0;
  height: 40%;
}
.era-banner {
  position: absolute;
  top: 0;
  width: 20px;
  height: 60px;
  animation: bannerWave 1.5s ease-in-out infinite;
  transform-origin: top center;
}
.era-banner::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 100%;
  background: #8B4513;
}
@keyframes bannerWave {
  0%, 100% { transform: skewX(-5deg); }
  50% { transform: skewX(5deg); }
}

/* Scene 3: Sword glints */
.era-scene-swords {
  position: absolute;
  inset: 0;
}
.era-sword-glint {
  position: absolute;
  width: 30px;
  height: 3px;
  background: linear-gradient(90deg, transparent, #fff, transparent);
  animation: swordGlint 1s ease-in-out infinite;
}
@keyframes swordGlint {
  0%, 100% { opacity: 0; transform: scaleX(0.5); }
  50% { opacity: 1; transform: scaleX(1.2); }
}
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  animation: ritualPulse 2s ease-in-out infinite;
}
.fire-scene-ritual::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 100px;
  height: 100px;
  border: 2px solid rgba(255,150,0,0.2);
  border-radius: 50%;
  animation: ritualRing 3s linear infinite;
}
@keyframes ritualPulse {
  0%, 100% { transform: translate(-50%, -50%) scale(1); filter: drop-shadow(0 0 10px rgba(255,100,0,0.5)); }
  50% { transform: translate(-50%, -50%) scale(1.1); filter: drop-shadow(0 0 20px rgba(255,100,0,0.8)); }
}
/* ── INDUSTRIAL ERA SCENES ── */
/* Scene 1: Ship sails */
.era-scene-ship {
  position: absolute;
  bottom: 20%;
  left: 50%;
  transform: translateX(-50%);
  width: 150px;
  height: 120px;
}
.era-scene-ship::before {
  content: '⛵';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  font-size: 70px;
  animation: shipSail 3s ease-in-out infinite;
}
@keyframes shipSail {
  0%, 100% { transform: translateX(-50%) translateY(0) rotate(-2deg); }
  50% { transform: translateX(-50%) translateY(-10px) rotate(2deg); }
}

/* Scene 2: Compass rose */
.era-scene-compass {
  position: absolute;
  top: 30%;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 100px;
}
.era-scene-compass::before {
  content: '🧭';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 50px;
  animation: compassSpin 6s linear infinite;
}
@keyframes compassSpin {
  0% { transform: translate(-50%, -50%) rotate(0deg); }
  100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Scene 3: Treasure coins */
.era-scene-coins {
  position: absolute;
  inset: 0;
}
.era-coin {
  position: absolute;
  top: -20px;
  font-size: 20px;
}
.era-coin::before {
  content: '🪙';
  animation: coinFall 2s ease-in infinite;
}
@keyframes coinFall {
  0% { transform: translateY(0) rotateY(0deg); opacity: 1; }
  100% { transform: translateY(100vh) rotateY(720deg); opacity: 0; }
}

/* ── MODERN ERA SCENES ── */
/* Scene 1: Steam clouds */
.era-scene-steam {
  position: absolute;
  inset: 0;
}
.era-steam-cloud {
  position: absolute;
  bottom: 20%;
  background: radial-gradient(ellipse, rgba(255,255,255,0.8), transparent);
  border-radius: 50%;
  animation: steamRise 4s ease-out infinite;
}
@keyframes steamRise {
  0% { transform: translateY(0) scale(0.5); opacity: 0.8; }
  100% { transform: translateY(-200px) scale(2); opacity: 0; }
}

/* Scene 2: Spinning gears */
.era-scene-gears {
  position: absolute;
  inset: 0;
}
.era-gear {
  position: absolute;
  font-size: 30px;
  animation: gearSpin 3s linear infinite;
}
@keyframes gearSpin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Scene 3: Electric sparks */
.era-scene-sparks {
  position: absolute;
  inset: 0;
}
.era-electric-bolt {
  position: absolute;
  width: 30px;
  height: 3px;
  background: linear-gradient(90deg, transparent, #ffff00, transparent);
  animation: electricFlash 0.3s ease-in-out infinite;
}
@keyframes electricFlash {
  0%, 100% { opacity: 0; }
  50% { opacity: 1; }
}

/* ── DIGITAL ERA SCENES ── */
/* Scene 1: Matrix rain */
.era-scene-matrix {
  position: absolute;
  inset: 0;
  overflow: hidden;
}
.era-matrix-col {
  position: absolute;
  top: -100%;
  display: flex;
  flex-direction: column;
  font-family: monospace;
  font-size: 14px;
  color: #00ff00;
  text-shadow: 0 0 5px #00ff00;
  animation: matrixFall 3s linear infinite;
}
.era-matrix-col span {
  line-height: 1.2;
}
@keyframes matrixFall {
  0% { transform: translateY(-100%); }
  100% { transform: translateY(100vh); }
}

/* Scene 2: Pixel grid */
.era-scene-grid {
  position: absolute;
  inset: 0;
}
.era-pixel {
  position: absolute;
  width: 20px;
  height: 20px;
  opacity: 0.6;
  animation: pixelPulse 1.5s ease-in-out infinite;
}
@keyframes pixelPulse {
  0%, 100% { opacity: 0.3; transform: scale(0.8); }
  50% { opacity: 0.8; transform: scale(1.1); }
}

/* Scene 3: Data streams */
.era-scene-data {
  position: absolute;
  inset: 0;
}
.era-data-stream {
  position: absolute;
  top: 0;
  width: 2px;
  height: 100%;
  background: linear-gradient(180deg, transparent, #00ffff, transparent);
  animation: dataFlow 2s linear infinite;
}
@keyframes dataFlow {
  0% { transform: translateY(-100%); }
  100% { transform: translateY(100%); }
}

/* ── FUTURE ERA SCENES ── */
/* Scene 1: Star field */
.era-scene-stars {
  position: absolute;
  inset: 0;
}
.era-star {
  position: absolute;
  background: #fff;
  border-radius: 50%;
  animation: starTwinkle 2s ease-in-out infinite;
}
@keyframes starTwinkle {
  0%, 100% { opacity: 0.3; transform: scale(0.8); }
  50% { opacity: 1; transform: scale(1.2); }
}

/* Scene 2: Plasma orbs */
.era-scene-plasma {
  position: absolute;
  inset: 0;
}
.era-plasma-orb {
  position: absolute;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  filter: blur(10px);
  animation: plasmaPulse 2s ease-in-out infinite;
}
@keyframes plasmaPulse {
  0%, 100% { transform: scale(0.8); opacity: 0.5; }
  50% { transform: scale(1.2); opacity: 0.9; }
}

/* Scene 3: Holographic grid */
.era-scene-holo {
  position: absolute;
  inset: 0;
  background: 
    linear-gradient(90deg, rgba(0,255,255,0.1) 1px, transparent 1px),
    linear-gradient(rgba(0,255,255,0.1) 1px, transparent 1px);
  background-size: 30px 30px;
  animation: holoScroll 4s linear infinite;
}
@keyframes holoScroll {
  0% { transform: perspective(500px) rotateX(60deg) translateY(0); }
  100% { transform: perspective(500px) rotateX(60deg) translateY(30px); }
}

/* ── COSMIC ERA SCENES ── */
/* Scene 1: Spiral galaxy */
.era-scene-galaxy {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 200px;
  height: 200px;
  background: radial-gradient(ellipse, rgba(255,255,255,0.3), rgba(100,100,255,0.2), transparent);
  border-radius: 50%;
  animation: galaxySpin 10s linear infinite;
}
@keyframes galaxySpin {
  0% { transform: translate(-50%, -50%) rotate(0deg); }
  100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Scene 2: Black hole */
.era-scene-blackhole {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 60px;
  height: 60px;
  background: radial-gradient(circle, #000, transparent);
  border-radius: 50%;
  box-shadow: 0 0 30px rgba(100,0,150,0.8), inset 0 0 20px rgba(100,0,150,0.5);
  animation: blackholePulse 2s ease-in-out infinite;
}
@keyframes blackholePulse {
  0%, 100% { transform: translate(-50%, -50%) scale(1); }
  50% { transform: translate(-50%, -50%) scale(1.1); }
}

/* Scene 3: Quantum particles */
.era-scene-quantum {
  position: absolute;
  inset: 0;
}
.era-quantum-particle {
  position: absolute;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  animation: quantumFloat 3s ease-in-out infinite;
}
@keyframes quantumFloat {
  0%, 100% { transform: translate(0, 0); opacity: 0.5; }
  25% { transform: translate(20px, -20px); opacity: 1; }
  50% { transform: translate(-10px, 20px); opacity: 0.3; }
  75% { transform: translate(-20px, -10px); opacity: 0.8; }
}

/* ══════════════════════════════════════════════════════════════
   ERA UNIQUE SCENES - Each era has its own unique animation
   ══════════════════════════════════════════════════════════════ */

/* ── PRIMITIVE ERA ── */
.era-campfire { position: absolute; bottom: 15%; left: 50%; transform: translateX(-50%); width: 120px; height: 100px; background: radial-gradient(ellipse at center bottom, rgba(255,100,0,0.4) 0%, rgba(255,60,0,0.2) 40%, transparent 70%); animation: campfireFlicker 0.8s ease-in-out infinite alternate; }
.era-campfire::before, .era-campfire::after { content: ''; position: absolute; bottom: 0; border-radius: 50% 50% 20% 20%; background: linear-gradient(0deg, rgba(255,150,0,0.9), rgba(255,80,0,0.6), rgba(255,40,0,0.1)); }
.era-campfire::before { left: 30%; width: 40%; height: 70%; animation: flameLeft 0.6s ease-in-out infinite alternate; }
.era-campfire::after { left: 45%; width: 30%; height: 85%; animation: flameRight 0.5s ease-in-out infinite alternate; }
@keyframes campfireFlicker { 0% { filter: brightness(0.9) blur(1px); } 100% { filter: brightness(1.1) blur(0.5px); } }
@keyframes flameLeft { 0% { transform: scaleY(0.8) skewX(-5deg); opacity: 0.8; } 100% { transform: scaleY(1.1) skewX(5deg); opacity: 1; } }
@keyframes flameRight { 0% { transform: scaleY(1) skewX(3deg); opacity: 0.9; } 100% { transform: scaleY(0.85) skewX(-3deg); opacity: 0.7; } }

.era-stone, .era-stone-piece { position: absolute; }
.era-stone-piece { font-size: 24px; animation: stoneFloat 3s ease-in-out infinite; }
@keyframes stoneFloat { 0%, 100% { transform: translateY(0) rotate(0deg); } 50% { transform: translateY(-10px) rotate(10deg); } }

.era-speech, .era-speech-char { position: absolute; }
.era-speech-char { font-size: 18px; color: #8B4513; animation: speechFloat 2s ease-in-out infinite; }
@keyframes speechFloat { 0%, 100% { transform: translateY(0); opacity: 0.6; } 50% { transform: translateY(-15px); opacity: 1; } }

.era-paint, .era-paint-mark { position: absolute; }
.era-paint-mark { animation: paintSplat 1.5s ease-out infinite; }
@keyframes paintSplat { 0% { transform: scale(0); opacity: 0; } 50% { transform: scale(1.2); opacity: 1; } 100% { transform: scale(1); opacity: 0.8; } }

.era-arrow, .era-arrow-shot { position: absolute; }
.era-arrow-shot { width: 30px; height: 3px; background: linear-gradient(90deg, #8B4513, #D2691E); animation: arrowFly 1.5s ease-out infinite; }
@keyframes arrowFly { 0% { transform: translateX(-100px) rotate(var(--rot)); opacity: 0; } 50% { opacity: 1; } 100% { transform: translateX(100px) rotate(var(--rot)); opacity: 0; } }

.era-paddle { position: absolute; top: 40%; left: 50%; transform: translateX(-50%); font-size: 60px; animation: paddleRow 2s ease-in-out infinite; }
.era-paddle::before { content: '🛶'; }
@keyframes paddleRow { 0%, 100% { transform: translateX(-50%) rotate(-10deg); } 50% { transform: translateX(-50%) rotate(10deg); } }

.era-wolf, .era-wolf-item { position: absolute; }
.era-wolf-item { font-size: 24px; animation: wolfMove 2s ease-in-out infinite; }
@keyframes wolfMove { 0%, 100% { transform: translateX(0); } 50% { transform: translateX(20px); } }

/* ── ANCIENT ERA ── */
.era-fish, .era-fish-item { position: absolute; }
.era-fish-item { font-size: 24px; animation: fishSwim 2s ease-in-out infinite; }
@keyframes fishSwim { 0%, 100% { transform: translateX(0) scaleX(1); } 50% { transform: translateX(30px) scaleX(-1); } }

.era-basket, .era-basket-item { position: absolute; }
.era-basket-item { font-size: 24px; animation: basketGather 2s ease-in-out infinite; }
@keyframes basketGather { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-15px); } }

.era-wheat { position: absolute; bottom: 10%; left: 0; right: 0; height: 60%; }
.era-wheat-stalk { position: absolute; bottom: 0; width: 3px; height: 50px; background: linear-gradient(0deg, #8B7355, #D4A574); border-radius: 2px; animation: wheatSway 2s ease-in-out infinite; transform-origin: bottom center; }
.era-wheat-stalk::before { content: '🌾'; position: absolute; top: -20px; left: 50%; transform: translateX(-50%); font-size: 20px; }
@keyframes wheatSway { 0%, 100% { transform: rotate(-5deg); } 50% { transform: rotate(5deg); } }

.era-clay { position: absolute; bottom: 20%; left: 50%; transform: translateX(-50%); font-size: 60px; }
.era-clay::before { content: '🏺'; animation: claySpin 4s linear infinite; }
@keyframes claySpin { 0% { transform: rotateY(0deg); } 100% { transform: rotateY(360deg); } }

.era-thread, .era-thread-item { position: absolute; }
.era-thread-item { font-size: 24px; animation: threadWeave 2s ease-in-out infinite; }
@keyframes threadWeave { 0%, 100% { transform: translateX(0); } 50% { transform: translateX(15px); } }

/* ── BRONZE/IRON ERA ── */
.era-furnace { position: absolute; bottom: 20%; left: 50%; transform: translateX(-50%); font-size: 60px; }
.era-furnace::before { content: '⚒️'; animation: furnaceGlow 1.5s ease-in-out infinite; }
@keyframes furnaceGlow { 0%, 100% { filter: brightness(1); } 50% { filter: brightness(1.5); } }

.era-alloy, .era-alloy-item { position: absolute; }
.era-alloy-item { font-size: 24px; animation: alloyShine 2s ease-in-out infinite; }
@keyframes alloyShine { 0%, 100% { filter: brightness(1); } 50% { filter: brightness(1.5) saturate(1.2); } }

.era-anvil, .era-anvil-item { position: absolute; }
.era-anvil-item { font-size: 24px; animation: anvilStrike 1s ease-out infinite; }
@keyframes anvilStrike { 0%, 80%, 100% { transform: translateY(0); } 90% { transform: translateY(-10px); } }

/* ── CLASSICAL ERA ── */
.era-column { position: absolute; bottom: 10%; left: 0; right: 0; height: 80%; }
.era-column-pillar { position: absolute; bottom: 0; width: 20px; height: 100px; background: linear-gradient(180deg, #D4A574, #8B7355); animation: columnRise 2s ease-out forwards; }
@keyframes columnRise { 0% { transform: translateY(50px); opacity: 0; } 100% { transform: translateY(0); opacity: 1; } }

.era-pavement, .era-pavement-stone { position: absolute; }
.era-pavement-stone { width: 30px; height: 30px; background: #8B7355; animation: pavementAppear 0.5s ease-out forwards; opacity: 0; }
@keyframes pavementAppear { 0% { opacity: 0; transform: scale(0.5); } 100% { opacity: 0.7; transform: scale(1); } }

.era-scroll { position: absolute; top: 30%; left: 50%; transform: translateX(-50%); font-size: 50px; }
.era-scroll::before { content: '📜'; animation: scrollUnfurl 2s ease-in-out infinite; }
@keyframes scrollUnfurl { 0%, 100% { transform: scaleX(1); } 50% { transform: scaleX(1.2); } }

.era-coin, .era-coin-item { position: absolute; }
.era-coin-item { font-size: 24px; animation: coinFall 2s ease-in infinite; }
@keyframes coinFall { 0% { transform: translateY(-20px) rotateY(0); opacity: 1; } 100% { transform: translateY(100vh) rotateY(720deg); opacity: 0; } }

.era-cement, .era-cement-item { position: absolute; }
.era-cement-item { font-size: 24px; animation: cementBuild 2s ease-out infinite; }
@keyframes cementBuild { 0% { transform: translateY(20px); opacity: 0; } 100% { transform: translateY(0); opacity: 1; } }

/* ── MEDIEVAL ERA ── */
.era-paper { position: absolute; inset: 0; }
.era-paper-sheet { position: absolute; width: 20px; height: 25px; background: #F5F5DC; border: 1px solid #D4A574; animation: paperFloat 3s ease-in-out infinite; }
@keyframes paperFloat { 0%, 100% { transform: translateY(0) rotate(0deg); } 50% { transform: translateY(-20px) rotate(10deg); } }

.era-explosion, .era-explosion-item { position: absolute; }
.era-explosion-item { font-size: 30px; animation: explosionBurst 1.5s ease-out infinite; }
@keyframes explosionBurst { 0% { transform: scale(0); opacity: 1; } 50% { transform: scale(1.5); opacity: 0.8; } 100% { transform: scale(2); opacity: 0; } }

.era-press, .era-press-item { position: absolute; }
.era-press-item { font-size: 24px; animation: pressPrint 2s ease-in-out infinite; }
@keyframes pressPrint { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }

.era-needle { position: absolute; top: 40%; left: 50%; transform: translateX(-50%); font-size: 50px; }
.era-needle::before { content: '🧭'; animation: needleSpin 3s linear infinite; }
@keyframes needleSpin { 0% { transform: translateX(-50%) rotate(0deg); } 100% { transform: translateX(-50%) rotate(360deg); } }

.era-star-nav { position: absolute; inset: 0; }
.era-star-dot { position: absolute; background: #fff; border-radius: 50%; animation: starTwinkle 2s ease-in-out infinite; }
@keyframes starTwinkle { 0%, 100% { opacity: 0.3; } 50% { opacity: 1; } }

/* ── RENAISSANCE/SCIENCE ── */
.era-art, .era-art-item { position: absolute; }
.era-art-item { font-size: 24px; animation: artFloat 2s ease-in-out infinite; }
@keyframes artFloat { 0%, 100% { transform: translateY(0) rotate(0deg); } 50% { transform: translateY(-15px) rotate(5deg); } }

.era-lens { position: absolute; top: 30%; left: 50%; transform: translateX(-50%); font-size: 50px; }
.era-lens::before { content: '🔭'; animation: lensFocus 2s ease-in-out infinite; }
@keyframes lensFocus { 0%, 100% { transform: translateX(-50%) scale(1); } 50% { transform: translateX(-50%) scale(1.1); } }

.era-apple, .era-apple-item { position: absolute; }
.era-apple-item { font-size: 24px; animation: appleDrop 2s ease-in infinite; }
@keyframes appleDrop { 0% { transform: translateY(-30px); opacity: 0; } 50% { opacity: 1; } 100% { transform: translateY(30px); opacity: 0; } }

.era-beaker, .era-beaker-item { position: absolute; }
.era-beaker-item { font-size: 24px; animation: beakerBubble 1.5s ease-in-out infinite; }
@keyframes beakerBubble { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }

.era-heat, .era-heat-item { position: absolute; }
.era-heat-item { font-size: 24px; animation: heatRise 2s ease-out infinite; }
@keyframes heatRise { 0% { transform: translateY(0); opacity: 1; } 100% { transform: translateY(-50px); opacity: 0; } }

/* ── INDUSTRIAL ERA ── */
.era-boiler, .era-boiler-item { position: absolute; }
.era-boiler-item { font-size: 24px; animation: boilerSteam 2s ease-out infinite; }
@keyframes boilerSteam { 0% { transform: translateY(0); opacity: 1; } 100% { transform: translateY(-40px); opacity: 0; } }

.era-lightning, .era-lightning-item { position: absolute; }
.era-lightning-item { font-size: 24px; animation: lightningFlash 0.5s ease-in-out infinite; }
@keyframes lightningFlash { 0%, 100% { opacity: 0.3; } 50% { opacity: 1; } }

.era-signal, .era-signal-item { position: absolute; }
.era-signal-item { font-size: 24px; animation: signalPulse 1.5s ease-in-out infinite; }
@keyframes signalPulse { 0%, 100% { transform: scale(1); opacity: 0.7; } 50% { transform: scale(1.2); opacity: 1; } }

.era-propeller, .era-propeller-item { position: absolute; }
.era-propeller-item { font-size: 24px; animation: propellerMove 2s ease-in-out infinite; }
@keyframes propellerMove { 0%, 100% { transform: translateX(0); } 50% { transform: translateX(20px); } }

/* ── MODERN ERA ── */
.era-wheel, .era-wheel-item { position: absolute; }
.era-wheel-item { font-size: 24px; animation: wheelRoll 2s linear infinite; }
@keyframes wheelRoll { 0% { transform: translateX(-20px) rotate(0deg); } 100% { transform: translateX(20px) rotate(360deg); } }

.era-wave, .era-wave-item { position: absolute; }
.era-wave-item { font-size: 24px; animation: waveBroadcast 1.5s ease-in-out infinite; }
@keyframes waveBroadcast { 0%, 100% { transform: scale(1); opacity: 0.7; } 50% { transform: scale(1.3); opacity: 1; } }

.era-wing, .era-wing-item { position: absolute; }
.era-wing-item { font-size: 24px; animation: wingFly 2s ease-in-out infinite; }
@keyframes wingFly { 0%, 100% { transform: translateY(0) rotate(0deg); } 50% { transform: translateY(-20px) rotate(5deg); } }

.era-radiation, .era-radiation-item { position: absolute; }
.era-radiation-item { font-size: 24px; animation: radiationPulse 2s ease-in-out infinite; }
@keyframes radiationPulse { 0%, 100% { transform: scale(1); filter: hue-rotate(0deg); } 50% { transform: scale(1.2); filter: hue-rotate(30deg); } }

/* ── DIGITAL ERA ── */
.era-helix, .era-helix-item { position: absolute; }
.era-helix-item { font-size: 24px; animation: helixSpin 3s linear infinite; }
@keyframes helixSpin { 0% { transform: rotateY(0deg); } 100% { transform: rotateY(360deg); } }

.era-orbit, .era-orbit-item { position: absolute; }
.era-orbit-item { font-size: 24px; animation: orbitCircle 4s linear infinite; }
@keyframes orbitCircle { 0% { transform: rotate(0deg) translateX(30px) rotate(0deg); } 100% { transform: rotate(360deg) translateX(30px) rotate(-360deg); } }

.era-rocket, .era-rocket-item { position: absolute; }
.era-rocket-item { font-size: 24px; animation: rocketLaunch 2s ease-out infinite; }
@keyframes rocketLaunch { 0% { transform: translateY(0); opacity: 1; } 100% { transform: translateY(-100px); opacity: 0; } }

.era-module, .era-module-item { position: absolute; }
.era-module-item { font-size: 24px; animation: moduleFloat 3s ease-in-out infinite; }
@keyframes moduleFloat { 0%, 100% { transform: translateY(0) rotate(0deg); } 50% { transform: translateY(-15px) rotate(5deg); } }

.era-network, .era-network-item { position: absolute; }
.era-network-item { font-size: 24px; animation: networkConnect 1.5s ease-in-out infinite; }
@keyframes networkConnect { 0%, 100% { transform: scale(1); opacity: 0.7; } 50% { transform: scale(1.2); opacity: 1; } }

.era-atom, .era-atom-item { position: absolute; }
.era-atom-item { font-size: 24px; animation: atomOrbit 3s linear infinite; }
@keyframes atomOrbit { 0% { transform: rotate(0deg) translateX(20px) rotate(0deg); } 100% { transform: rotate(360deg) translateX(20px) rotate(-360deg); } }

/* ── FUTURE ERA ── */
.era-nebula { position: absolute; inset: 0; }
.era-nebula-particle { position: absolute; width: 8px; height: 8px; border-radius: 50%; animation: nebulaDrift 4s ease-in-out infinite; }
@keyframes nebulaDrift { 0%, 100% { transform: translate(0, 0); opacity: 0.5; } 50% { transform: translate(20px, -20px); opacity: 1; } }

.era-dyson, .era-dyson-item { position: absolute; }
.era-dyson-item { font-size: 24px; animation: dysonPulse 2s ease-in-out infinite; }
@keyframes dysonPulse { 0%, 100% { transform: scale(1); filter: brightness(1); } 50% { transform: scale(1.1); filter: brightness(1.3); } }

.era-galaxy { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 200px; height: 200px; background: radial-gradient(ellipse, rgba(255,255,255,0.3), rgba(100,100,255,0.2), transparent); border-radius: 50%; animation: galaxySpin 10s linear infinite; }
@keyframes galaxySpin { 0% { transform: translate(-50%, -50%) rotate(0deg); } 100% { transform: translate(-50%, -50%) rotate(360deg); } }

/* ── COSMIC ERA ── */
.era-portal { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 100px; height: 100px; border: 3px solid rgba(100,200,255,0.5); border-radius: 50%; animation: portalSpin 3s linear infinite; }
@keyframes portalSpin { 0% { transform: translate(-50%, -50%) rotate(0deg) scale(1); } 50% { transform: translate(-50%, -50%) rotate(180deg) scale(1.2); } 100% { transform: translate(-50%, -50%) rotate(360deg) scale(1); } }

.era-shard, .era-shard-item { position: absolute; }
.era-shard-item { font-size: 24px; animation: shardFloat 2s ease-in-out infinite; }
@keyframes shardFloat { 0%, 100% { transform: translateY(0) rotate(0deg); } 50% { transform: translateY(-20px) rotate(15deg); } }

.era-glow, .era-glow-item { position: absolute; }
.era-glow-item { font-size: 24px; animation: glowPulse 2s ease-in-out infinite; }
@keyframes glowPulse { 0%, 100% { filter: brightness(1) drop-shadow(0 0 5px rgba(255,255,255,0.5)); } 50% { filter: brightness(1.5) drop-shadow(0 0 20px rgba(255,255,255,0.8)); } }

.era-vortex { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 120px; height: 120px; border: 4px solid transparent; border-top-color: rgba(100,200,255,0.8); border-bottom-color: rgba(200,100,255,0.8); border-radius: 50%; animation: vortexSpin 2s linear infinite; }
@keyframes vortexSpin { 0% { transform: translate(-50%, -50%) rotate(0deg); } 100% { transform: translate(-50%, -50%) rotate(360deg); } }

/* ── FIRE SCENE CONTAINER ── */
.fire-scenes-container {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

/* ══════════════════════════════════════════════════════════════
   HIDDEN CLICKABLE RESOURCES
   ══════════════════════════════════════════════════════════════ */
.era-hidden-resource {
  position: absolute;
  font-size: 16px;
  cursor: pointer;
  z-index: 100;
  animation: resourceSparkle 1.5s ease-in-out infinite;
  filter: drop-shadow(0 0 6px rgba(255,255,100,0.8));
  transition: transform 0.2s, filter 0.2s;
  pointer-events: auto;
}
.era-hidden-resource:hover {
  transform: scale(1.5);
  filter: drop-shadow(0 0 15px rgba(255,255,100,1));
}
@keyframes resourceSparkle {
  0%, 100% { opacity: 0.4; transform: scale(0.8) rotate(0deg); }
  50% { opacity: 1; transform: scale(1.1) rotate(15deg); }
}
.era-resource-popup {
  position: absolute;
  font-size: 18px;
  font-weight: bold;
  color: #ffd700;
  text-shadow: 0 0 10px rgba(255,215,0,0.8);
  pointer-events: none;
  z-index: 200;
  animation: resourcePopup 1s ease-out forwards;
}
@keyframes resourcePopup {
  0% { transform: translateY(0); opacity: 1; }
  100% { transform: translateY(-50px); opacity: 0; }
}

@media (max-width: 600px) {
  body { padding: 10px 8px; font-size: 13px; line-height: 1.5; }
  #header { padding-bottom: 6px; margin-bottom: 8px; }
  #header #lang-toggle { font-size: 11px; padding: 1px 5px; }
  #resources { font-size: 12px; line-height: 1.6; }
  .resource { margin-left: 8px; }
  .auto-toggle { font-size: 11px; padding: 1px 5px; margin-right: 5px; }
  #era { padding: 6px 10px; margin-bottom: 6px; }
  .era-emoji { font-size: 16px; }
  .era-name { font-size: 14px; }
  .era-era, .era-year { font-size: 11px; }
  .era-bar { margin-top: 2px; }
  #story { margin-bottom: 6px; min-height: 30px; font-size: 13px; line-height: 1.5; }
  #story p { margin-bottom: 4px; font-size: 13px; line-height: 1.5; }
  .story-era-name { font-size: 13px; margin-bottom: 3px; }
  .story-detail { font-size: 12px; line-height: 1.5; }
  .story-timeline { padding-top: 4px; }
  .story-timeline-label { font-size: 11px; margin-bottom: 2px; }
  .story-past-era { font-size: 11px; margin-right: 6px; }
  #buildings-info { margin: 3px 0; }
  .building-tag { font-size: 12px; }
  #actions { margin: 6px 0 4px; gap: 4px; }
  .action-btn { padding: 5px 10px; font-size: 12px; }
  .branch-card { padding: 6px 10px; min-width: 140px; }
  .branch-choice-title { font-size: 13px; }
  .branch-choice-bonus { font-size: 11px; }
  .branch-choice-desc { font-size: 11px; line-height: 1.4; margin-bottom: 3px; }
  .branch-choice-preview { font-size: 11px; }
  .branch-header { margin-bottom: 4px; font-size: 13px; }
  .branch-header p { font-size: 12px; margin-top: 1px; }
  #log { margin-top: 6px; padding-top: 4px; max-height: 120px; font-size: 12px; }
  #log p { margin-bottom: 1px; }
  .auto-indicator { padding: 8px 0; font-size: 12px; }
  .era-overlay-emoji { font-size: 60px; }
  .era-overlay-name { font-size: 22px; }
  .era-overlay-era { font-size: 13px; }
  .at-void .era-deco-ring { display: none; }
}