/* ============================
   BASE & VARIABLES
   ============================ */
:root {
  --pixel: 4px;
  --zone1: #3d9970;
  --zone2: #e67e22;
  --zone3: #8e44ad;
  --ui-bg: #1a1a2e;
  --ui-card: #16213e;
  --ui-border: #0f3460;
  --gold: #f0c040;
  --hp-green: #2ecc71;
  --hp-red: #e74c3c;
  --white: #f0e6d3;
  --shadow: 0 4px 0 rgba(0,0,0,0.5);
}

* { margin: 0; padding: 0; box-sizing: border-box; image-rendering: pixelated; }

body {
  background: #0d0d1a;
  font-family: 'Nunito', sans-serif;
  color: var(--white);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  overflow-x: hidden;
}

/* ============================
   SCREENS
   ============================ */
.screen {
  display: none;
  width: 100%;
  max-width: 720px;
  padding: 16px;
  min-height: 100vh;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.screen.active { display: flex; }

/* ============================
   TITLE SCREEN
   ============================ */
#title-screen {
  background: radial-gradient(ellipse at center, #1a1a4e 0%, #0d0d1a 70%);
  text-align: center;
  gap: 0;
}

.pixel-title {
  font-family: 'Press Start 2P', monospace;
  font-size: clamp(14px, 3.5vw, 22px);
  color: var(--gold);
  text-shadow: 4px 4px 0 #7a4f00, 0 0 30px rgba(240,192,64,0.6);
  line-height: 1.8;
  margin-bottom: 8px;
  animation: titlePulse 2s ease-in-out infinite;
}

@keyframes titlePulse {
  0%,100% { text-shadow: 4px 4px 0 #7a4f00, 0 0 20px rgba(240,192,64,0.4); }
  50%      { text-shadow: 4px 4px 0 #7a4f00, 0 0 50px rgba(240,192,64,0.9); }
}

.title-sub {
  font-family: 'Press Start 2P', monospace;
  font-size: clamp(6px, 1.5vw, 9px);
  color: #a0c4ff;
  margin-bottom: 40px;
  letter-spacing: 2px;
}

@keyframes heroIdle {
  0%   { transform: translateY(0); }
  50%  { transform: translateY(-4px); }
  100% { transform: translateY(0); }
}

.title-story {
  background: rgba(15,52,96,0.6);
  border: 2px solid var(--ui-border);
  border-radius: 4px;
  padding: 20px 24px;
  font-size: 13px;
  line-height: 1.9;
  color: #c8d8f0;
  max-width: 520px;
  margin-bottom: 36px;
  text-align: left;
}
.title-story strong { color: var(--gold); }

.zones-preview {
  display: flex;
  gap: 12px;
  margin-bottom: 36px;
  flex-wrap: wrap;
  justify-content: center;
}
.zone-chip {
  font-family: 'Press Start 2P', monospace;
  font-size: 7px;
  padding: 10px 14px;
  border-radius: 4px;
  border: 2px solid;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}
.zone-chip span { font-family: 'Nunito', sans-serif; font-size: 10px; opacity: 0.8; }
.zone-chip.z1 { color: #2ecc71; border-color: #2ecc71; background: rgba(46,204,113,0.1); }
.zone-chip.z2 { color: #e67e22; border-color: #e67e22; background: rgba(230,126,34,0.1); }
.zone-chip.z3 { color: #a855f7; border-color: #a855f7; background: rgba(168,85,247,0.1); }

/* ============================
   BUTTONS
   ============================ */
.btn-pixel {
  font-family: 'Press Start 2P', monospace;
  font-size: clamp(9px, 2vw, 12px);
  padding: 14px 28px;
  border: none;
  cursor: pointer;
  position: relative;
  transition: transform 0.1s, box-shadow 0.1s;
  letter-spacing: 1px;
  border-radius: 2px;
}
.btn-pixel:active { transform: translateY(3px); }
.btn-pixel:focus-visible { outline: 3px solid #3498db; outline-offset: 3px; }

.btn-start {
  background: var(--gold);
  color: #1a0a00;
  box-shadow: 0 6px 0 #7a4f00;
}
.btn-start:hover { background: #ffe060; }
.btn-start:active { box-shadow: 0 2px 0 #7a4f00; }

.btn-next {
  background: #3498db;
  color: #fff;
  box-shadow: 0 6px 0 #1a5a8a;
}
.btn-next:hover { background: #5dade2; }
.btn-next:active { box-shadow: 0 2px 0 #1a5a8a; }

.btn-danger {
  background: #e74c3c;
  color: #fff;
  box-shadow: 0 6px 0 #922b21;
}

/* ============================
   OVERWORLD MAP
   ============================ */
#map-screen {
  background: #0d0d1a;
  gap: 20px;
  padding-top: 32px;
}

.map-header {
  text-align: center;
  font-family: 'Press Start 2P', monospace;
  font-size: 10px;
  color: var(--gold);
  margin-bottom: 4px;
}

.map-subtitle {
  font-size: 12px;
  color: #8899aa;
  text-align: center;
  margin-bottom: 16px;
}

.map-toast {
  font-family: 'Press Start 2P', monospace;
  font-size: 8px;
  color: #e74c3c;
  background: rgba(231,76,60,0.15);
  border: 1px solid #e74c3c;
  border-radius: 4px;
  padding: 8px 16px;
  text-align: center;
  animation: toastFade 0.3s ease;
  display: none;
}
.map-toast.show { display: block; }
@keyframes toastFade {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}

.world-map {
  width: 100%;
  max-width: 680px;
  border: 3px solid var(--ui-border);
  border-radius: 6px;
  overflow: hidden;
  position: relative;
  background: #1a2a1a;
}

.map-zone {
  padding: 20px 24px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 20px;
  border-bottom: 2px solid #0d1a0d;
  transition: filter 0.2s, transform 0.1s;
  position: relative;
  overflow: hidden;
}
.map-zone:last-child { border-bottom: none; }
.map-zone::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent 60%, rgba(255,255,255,0.03));
}
.map-zone.zone-1 { background: linear-gradient(135deg, #1a3a2a, #0d2a1a); }
.map-zone.zone-2 { background: linear-gradient(135deg, #3a2010, #1a1008); }
.map-zone.zone-3 { background: linear-gradient(135deg, #2a1a3a, #12091a); }

.map-zone.locked { filter: brightness(0.35) saturate(0.2); cursor: not-allowed; }
.map-zone.locked::after {
  content: '🔒';
  position: absolute;
  right: 20px; top: 50%;
  transform: translateY(-50%);
  font-size: 22px;
  filter: none;
}
.map-zone.completed::after {
  content: '✓';
  position: absolute;
  right: 20px; top: 50%;
  transform: translateY(-50%);
  font-size: 22px;
  color: var(--gold);
  font-weight: 900;
  text-shadow: 0 0 8px var(--gold);
}
.map-zone.replay::after {
  content: '↻';
  position: absolute;
  right: 20px; top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  color: #3498db;
  font-weight: 900;
}
.map-zone:not(.locked):hover {
  transform: scale(1.01);
  filter: brightness(1.2);
}

.zone-icon {
  font-size: 42px;
  flex-shrink: 0;
  filter: drop-shadow(0 2px 6px rgba(0,0,0,0.5));
}

.zone-info { flex: 1; }
.zone-name {
  font-family: 'Press Start 2P', monospace;
  font-size: 9px;
  margin-bottom: 6px;
}
.zone-1 .zone-name { color: #2ecc71; }
.zone-2 .zone-name { color: #e67e22; }
.zone-3 .zone-name { color: #a855f7; }

.zone-desc { font-size: 12px; color: #8899bb; line-height: 1.5; }
.zone-stars {
  display: flex; gap: 3px; margin-top: 6px;
}
.star { font-size: 14px; opacity: 0.25; }
.star.earned { opacity: 1; filter: drop-shadow(0 0 4px var(--gold)); }

.replay-badge {
  font-family: 'Press Start 2P', monospace;
  font-size: 6px;
  color: #3498db;
  background: rgba(52,152,219,0.15);
  border: 1px solid #3498db;
  border-radius: 2px;
  padding: 2px 8px;
  margin-top: 6px;
  display: none;
}
.map-zone.replay .replay-badge { display: inline-block; }

/* HP BAR in map */
.map-status {
  width: 100%;
  max-width: 680px;
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--ui-card);
  border: 2px solid var(--ui-border);
  border-radius: 6px;
  padding: 14px 20px;
}
.status-hero { font-size: 28px; }
.status-info { flex: 1; }
.status-name {
  font-family: 'Press Start 2P', monospace;
  font-size: 8px;
  color: var(--gold);
  margin-bottom: 6px;
}
.hp-bar-wrap {
  display: flex; align-items: center; gap: 8px;
}
.hp-label { font-family: 'Press Start 2P', monospace; font-size: 7px; color: #e74c3c; }
.hp-track {
  flex: 1; height: 12px;
  background: #333;
  border: 2px solid #555;
  border-radius: 2px;
  overflow: hidden;
}
.hp-fill {
  height: 100%;
  background: linear-gradient(90deg, #2ecc71, #27ae60);
  transition: width 0.5s ease;
  border-radius: 1px;
}
.hp-fill.low { background: linear-gradient(90deg, #e74c3c, #c0392b); }
.hp-fill.mid { background: linear-gradient(90deg, #f39c12, #e67e22); }
.hp-num { font-family: 'Press Start 2P', monospace; font-size: 7px; white-space: nowrap; }

.status-score {
  text-align: right;
}
.score-label { font-family: 'Press Start 2P', monospace; font-size: 7px; color: var(--gold); }
.score-val { font-family: 'Press Start 2P', monospace; font-size: 16px; color: var(--gold); text-shadow: 0 0 8px var(--gold); }

/* ============================
   BATTLE / QUESTION SCREEN
   ============================ */
#battle-screen {
  background: #0d0d1a;
  gap: 0;
  padding: 0;
  justify-content: flex-start;
}

.battle-bg {
  width: 100%;
  max-width: 720px;
  height: 180px;
  position: relative;
  overflow: hidden;
  flex-shrink: 0;
}

.battle-bg-z1 { background: linear-gradient(180deg, #1a4a2a 0%, #0f2a16 60%, #2a5a1a 100%); }
.battle-bg-z2 { background: linear-gradient(180deg, #3a2010 0%, #1a0f08 60%, #4a3020 100%); }
.battle-bg-z3 { background: linear-gradient(180deg, #2a1a3a 0%, #12091a 60%, #1a0f2a 100%); }

.battle-bg::before {
  content: '✦ · ✦ ✧ · ✦ · ✧ ✦ · ✦';
  position: absolute;
  top: 10px; left: 0; right: 0;
  text-align: center;
  font-size: 10px;
  letter-spacing: 20px;
  opacity: 0.25;
  color: #fff;
}

@keyframes enemyFloat {
  0%,100% { transform: translateY(0) rotate(-1deg); }
  50%      { transform: translateY(-6px) rotate(1deg); }
}

.enemy-hp-bar {
  position: absolute;
  right: 16px; top: 10px;
  width: 130px;
  z-index: 10;
}
.enemy-hp-label {
  font-family: 'Press Start 2P', monospace;
  font-size: 5px;
  color: var(--hp-red);
  margin-bottom: 2px;
  text-shadow: 0 0 4px rgba(231,76,60,0.5);
  text-align: right;
}
.enemy-hp-track {
  height: 7px;
  background: #222;
  border: 1px solid #444;
  border-radius: 2px;
  overflow: hidden;
}
.enemy-hp-fill {
  height: 100%;
  background: linear-gradient(90deg, #e74c3c, #c0392b);
  transition: width 0.6s ease;
}

.damage-popup {
  position: absolute;
  font-family: 'Press Start 2P', monospace;
  font-size: 18px;
  font-weight: 900;
  pointer-events: none;
  animation: dmgPop 0.8s ease forwards;
}
@keyframes dmgPop {
  0%   { opacity: 1; transform: translateY(0) scale(1); }
  50%  { opacity: 1; transform: translateY(-30px) scale(1.3); }
  100% { opacity: 0; transform: translateY(-60px) scale(0.8); }
}

/* Battle UI panel */
.battle-panel {
  width: 100%;
  max-width: 720px;
  background: var(--ui-bg);
  border-top: 3px solid var(--ui-border);
  padding: 16px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.battle-zone-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: 'Press Start 2P', monospace;
  font-size: 7px;
  padding: 5px 10px;
  border-radius: 2px;
  align-self: flex-start;
}
.tag-z1 { background: rgba(46,204,113,0.15); color: #2ecc71; border: 1px solid #2ecc71; }
.tag-z2 { background: rgba(230,126,34,0.15); color: #e67e22; border: 1px solid #e67e22; }
.tag-z3 { background: rgba(168,85,247,0.15); color: #a855f7; border: 1px solid #a855f7; }

.question-progress {
  font-family: 'Press Start 2P', monospace;
  font-size: 7px;
  color: #556677;
  text-align: right;
  margin-top: -10px;
}

.key-hint {
  font-family: 'Press Start 2P', monospace;
  font-size: 6px;
  color: #445566;
  text-align: center;
  margin-top: -6px;
  opacity: 0.7;
}
.key-hint kbd {
  background: var(--ui-card);
  border: 1px solid var(--ui-border);
  border-radius: 2px;
  padding: 1px 6px;
  font-family: 'Press Start 2P', monospace;
  font-size: 6px;
  color: #8899bb;
}

.question-box {
  background: var(--ui-card);
  border: 2px solid var(--ui-border);
  border-radius: 4px;
  padding: 16px 18px;
  font-size: 14px;
  line-height: 1.7;
  color: #d0e0f0;
  position: relative;
}
.question-box::before {
  content: '?';
  position: absolute;
  top: -12px; left: 14px;
  font-family: 'Press Start 2P', monospace;
  font-size: 12px;
  color: var(--gold);
  background: var(--ui-bg);
  padding: 0 6px;
}

.choices {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.choice-btn {
  background: var(--ui-card);
  border: 2px solid var(--ui-border);
  border-radius: 4px;
  padding: 12px 14px;
  font-family: 'Nunito', sans-serif;
  font-size: 13px;
  color: #c0d0e0;
  text-align: left;
  cursor: pointer;
  transition: all 0.15s;
  display: flex;
  gap: 10px;
  align-items: flex-start;
  line-height: 1.5;
}
.choice-btn:hover:not(:disabled) {
  border-color: #3498db;
  background: rgba(52,152,219,0.12);
  color: #fff;
  transform: translateY(-2px);
}
.choice-btn:focus-visible {
  outline: 3px solid #3498db;
  outline-offset: 2px;
}
.choice-letter {
  font-family: 'Press Start 2P', monospace;
  font-size: 9px;
  color: #3498db;
  flex-shrink: 0;
  margin-top: 2px;
}
.choice-btn.correct {
  border-color: #2ecc71;
  background: rgba(46,204,113,0.15);
  color: #fff;
  animation: correctFlash 0.4s ease;
}
.choice-btn.correct .choice-letter { color: #2ecc71; }
@keyframes correctFlash {
  0%,100% { transform: scale(1); }
  50% { transform: scale(1.04); }
}
.choice-btn.wrong {
  border-color: #e74c3c;
  background: rgba(231,76,60,0.15);
  animation: wrongShake 0.35s ease;
}
.choice-btn.wrong .choice-letter { color: #e74c3c; }
@keyframes wrongShake {
  0%,100% { transform: translateX(0); }
  20%,60%  { transform: translateX(-6px); }
  40%,80%  { transform: translateX(6px); }
}
.choice-btn.dimmed { opacity: 0.3; }
.choice-btn:disabled { cursor: default; }

/* Explanation */
.explanation-box {
  background: rgba(15,52,96,0.5);
  border-left: 3px solid #3498db;
  border-radius: 0 4px 4px 0;
  padding: 12px 16px;
  font-size: 12.5px;
  line-height: 1.7;
  color: #a0b8d0;
  display: none;
  animation: fadeSlide 0.3s ease;
}
.explanation-box.show { display: block; }
@keyframes fadeSlide {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}
.explanation-box strong { color: #5dade2; }

/* Continue button */
.battle-footer {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

/* ============================
   ZONE COMPLETE / LEVEL UP
   ============================ */
#levelup-screen {
  background: radial-gradient(ellipse at center, #1a1a4e 0%, #0d0d1a 70%);
  text-align: center;
  gap: 20px;
}

.levelup-badge {
  font-size: 80px;
  animation: badgePop 0.5s cubic-bezier(0.36,0.07,0.19,0.97);
}
@keyframes badgePop {
  0% { transform: scale(0) rotate(-20deg); }
  60% { transform: scale(1.3) rotate(5deg); }
  100% { transform: scale(1) rotate(0); }
}

.levelup-title {
  font-family: 'Press Start 2P', monospace;
  font-size: clamp(12px, 3vw, 18px);
  color: var(--gold);
  text-shadow: 0 0 20px var(--gold);
  line-height: 1.6;
}

.levelup-sub {
  font-size: 14px;
  color: #a0b8d0;
  max-width: 420px;
  line-height: 1.7;
}

.xp-gained {
  font-family: 'Press Start 2P', monospace;
  font-size: 12px;
  color: #2ecc71;
  background: rgba(46,204,113,0.1);
  border: 2px solid #2ecc71;
  padding: 10px 24px;
  border-radius: 4px;
}

.hp-recovered {
  font-family: 'Press Start 2P', monospace;
  font-size: 10px;
  color: #3498db;
  background: rgba(52,152,219,0.1);
  border: 2px solid #3498db;
  padding: 8px 20px;
  border-radius: 4px;
  margin-top: -8px;
}

.replay-notice {
  font-family: 'Press Start 2P', monospace;
  font-size: 8px;
  color: #8899aa;
  background: rgba(255,255,255,0.05);
  border: 1px dashed #445566;
  padding: 10px 16px;
  border-radius: 4px;
  max-width: 400px;
  line-height: 1.6;
}

.stats-gained {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.stat-badge {
  background: var(--ui-card);
  border: 2px solid var(--ui-border);
  border-radius: 4px;
  padding: 12px 16px;
  font-family: 'Press Start 2P', monospace;
  font-size: 7px;
  color: #8899bb;
  text-align: center;
}
.stat-badge .val { font-size: 20px; color: var(--gold); display: block; margin-bottom: 4px; }

/* ============================
   GAME OVER
   ============================ */
#gameover-screen {
  background: radial-gradient(ellipse at center, #2a0505 0%, #0d0d1a 70%);
  text-align: center;
  gap: 20px;
}
.gameover-title {
  font-family: 'Press Start 2P', monospace;
  font-size: clamp(14px, 4vw, 24px);
  color: #e74c3c;
  text-shadow: 0 0 20px rgba(231,76,60,0.8);
  line-height: 1.6;
}
.gameover-msg { font-size: 14px; color: #a0b0c0; max-width: 380px; line-height: 1.7; }

/* ============================
   VICTORY
   ============================ */
#victory-screen {
  background: radial-gradient(ellipse at center, #1a3a1a 0%, #0d0d1a 70%);
  text-align: center;
  gap: 20px;
}

.victory-title {
  font-family: 'Press Start 2P', monospace;
  font-size: clamp(12px, 3vw, 18px);
  color: var(--gold);
  text-shadow: 0 0 30px var(--gold);
  line-height: 1.8;
}

.final-score-box {
  background: var(--ui-card);
  border: 3px solid var(--gold);
  border-radius: 6px;
  padding: 24px 32px;
  box-shadow: 0 0 30px rgba(240,192,64,0.3);
}

.final-score-label {
  font-family: 'Press Start 2P', monospace;
  font-size: 8px;
  color: #8899aa;
  margin-bottom: 8px;
}
.final-score-num {
  font-family: 'Press Start 2P', monospace;
  font-size: 40px;
  color: var(--gold);
  text-shadow: 0 0 20px var(--gold);
}

.final-grade {
  font-family: 'Press Start 2P', monospace;
  font-size: 10px;
  padding: 8px 16px;
  border-radius: 4px;
  display: inline-block;
  margin-top: 8px;
}
.grade-s { background: rgba(240,192,64,0.2); color: var(--gold); border: 2px solid var(--gold); }
.grade-a { background: rgba(46,204,113,0.2); color: #2ecc71; border: 2px solid #2ecc71; }
.grade-b { background: rgba(52,152,219,0.2); color: #3498db; border: 2px solid #3498db; }
.grade-c { background: rgba(155,89,182,0.2); color: #a855f7; border: 2px solid #a855f7; }

.trophy-row {
  display: flex; gap: 12px; justify-content: center; font-size: 32px;
  filter: drop-shadow(0 0 8px rgba(240,192,64,0.5));
}

.credits-text {
  font-size: 11px;
  color: #445566;
  max-width: 400px;
  line-height: 1.8;
  text-align: center;
}

/* ============================
   PIXEL PARTICLES
   ============================ */
.particles { position: fixed; inset: 0; pointer-events: none; z-index: 999; overflow: hidden; }
.particle {
  position: absolute;
  width: 6px; height: 6px;
  border-radius: 1px;
  animation: particleFly 1s ease-out forwards;
}
@keyframes particleFly {
  from { opacity: 1; transform: translate(0,0) scale(1); }
  to   { opacity: 0; transform: var(--fly); }
}

/* ============================
   RESPONSIVE
   ============================ */
/* ============================
   PIXEL SPRITES (img tags)
   ============================ */
.pixel-sprite {
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  display: block;
}
.title-sprite {
  width: 72px; height: 96px;
  margin: 0 auto 20px;
}
.map-sprite {
  width: 36px; height: 48px;
}
.battle-hero-sprite {
  width: 64px; height: 84px;
  position: absolute;
  left: 40px; bottom: 16px;
  animation: none;
  z-index: 2;
}
/* Hero charges toward enemy on correct answer */
.battle-hero-sprite.attacking {
  animation: heroChargeAttack 0.65s ease-out;
}
/* Hero flinches when enemy attacks */
.battle-hero-sprite.hurt {
  animation: heroFlinch 0.55s ease;
}
/* Hero charges forward, slashes, returns */
@keyframes heroChargeAttack {
  0%   { transform: translateX(0) rotate(0); }
  20%  { transform: translateX(120px) rotate(-5deg); }
  40%  { transform: translateX(280px) rotate(-10deg); }
  50%  { transform: translateX(310px) rotate(-10deg); }
  60%  { transform: translateX(280px) rotate(-10deg); }
  85%  { transform: translateX(30px) rotate(3deg); }
  100% { transform: translateX(0) rotate(0); }
}
/* Hero gets knocked back by enemy attack */
@keyframes heroFlinch {
  0%   { transform: translateX(0); filter: none; }
  20%  { transform: translateX(-25px); filter: brightness(2.5) saturate(0); }
  35%  { transform: translateX(-8px); filter: brightness(1.5); }
  55%  { transform: translateX(-20px); }
  100% { transform: translateX(0); filter: none; }
}

/* Slash/impact visual effect */
.slash-effect {
  position: absolute;
  width: 60px; height: 60px;
  pointer-events: none;
  opacity: 0;
  z-index: 5;
  font-size: 48px;
  text-shadow: 0 0 20px rgba(255,255,255,0.9);
}
.slash-effect.show {
  animation: slashBurst 0.5s ease-out forwards;
}
.slash-effect.correct {
  color: #f0c040;
  left: 55%; top: 25%;
}
.slash-effect.wrong {
  color: #e74c3c;
  left: 20%; top: 50%;
}
@keyframes slashBurst {
  0%   { opacity: 0; transform: scale(0.3) rotate(-30deg); }
  30%  { opacity: 1; transform: scale(1.6) rotate(10deg); }
  100% { opacity: 0; transform: scale(2.0) rotate(20deg); }
}

.enemy-sprite-img {
  width: 84px; height: 112px;
  position: absolute;
  right: 44px; top: 38px;
  animation: enemyFloat 1.5s ease-in-out infinite;
  filter: drop-shadow(0 8px 16px rgba(0,0,0,0.6));
  z-index: 1;
}
/* Enemy takes damage */
.enemy-sprite-img.hit {
  animation: enemyHit 0.4s ease;
}
/* Enemy attacks hero */
.enemy-sprite-img.attacking {
  animation: enemyChargeAttack 0.6s ease-out;
}
/* Enemy flinches when hit */
@keyframes enemyHit {
  0%   { transform: translateX(0); filter: drop-shadow(0 8px 16px rgba(0,0,0,0.6)) brightness(1); }
  30%  { transform: translateX(15px); filter: drop-shadow(0 8px 16px rgba(0,0,0,0.6)) brightness(3); }
  60%  { transform: translateX(-8px); filter: drop-shadow(0 8px 16px rgba(255,255,255,0.8)) brightness(1.5); }
  100% { transform: translateX(0); filter: drop-shadow(0 8px 16px rgba(0,0,0,0.6)) brightness(1); }
}
/* Enemy charges toward hero */
@keyframes enemyChargeAttack {
  0%   { transform: translateX(0) scaleX(1); }
  15%  { transform: translateX(-80px) scaleX(1.1); }
  35%  { transform: translateX(-230px) scaleX(1.15); }
  55%  { transform: translateX(-200px) scaleX(1.1); }
  75%  { transform: translateX(-30px) scaleX(1); }
  100% { transform: translateX(0) scaleX(1); }
}

.zone-icon-sprite {
  width: 48px; height: 64px;
  flex-shrink: 0;
  filter: drop-shadow(0 2px 6px rgba(0,0,0,0.5));
}

/* ============================
   HERO HP BAR IN BATTLE
   ============================ */
.hero-battle-hp {
  position: absolute;
  left: 16px; top: 10px;
  background: rgba(22,33,62,0.85);
  border: 2px solid var(--ui-border);
  border-radius: 4px;
  padding: 6px 10px;
  z-index: 10;
  min-width: 140px;
}
.hero-battle-hp-label {
  font-family: 'Press Start 2P', monospace;
  font-size: 5px;
  color: var(--gold);
  margin-bottom: 2px;
  text-shadow: 0 0 6px rgba(240,192,64,0.4);
}
.hero-battle-hp .hp-bar-wrap {
  display: flex; align-items: center; gap: 6px;
}
.hero-battle-hp .hp-track {
  width: 85px; height: 7px;
  background: #222;
  border: 1px solid #444;
  border-radius: 2px;
  overflow: hidden;
}
.hero-battle-hp .hp-fill {
  height: 100%;
  background: linear-gradient(90deg, #2ecc71, #27ae60);
  transition: width 0.4s ease;
  border-radius: 1px;
}
.hero-battle-hp .hp-fill.low { background: linear-gradient(90deg, #e74c3c, #c0392b); }
.hero-battle-hp .hp-fill.mid { background: linear-gradient(90deg, #f39c12, #e67e22); }
.hero-battle-hp .hp-num {
  font-family: 'Press Start 2P', monospace;
  font-size: 5px; color: #fff; white-space: nowrap;
}

/* ============================
   RESPONSIVE — TABLET (≤600px)
   ============================ */
@media (max-width: 600px) {
  .screen { padding: 10px; }
  .pixel-title { font-size: 16px; line-height: 1.6; }
  .title-sprite { width: 56px; height: 76px; }
  .title-story { font-size: 11px; padding: 14px 16px; }
  .btn-pixel { font-size: 10px; padding: 12px 22px; min-height: 44px; }

  .map-status { padding: 10px 14px; gap: 10px; }
  .map-sprite { width: 28px; height: 38px; }
  .status-name { font-size: 6px; }
  .score-val { font-size: 12px; }

  .battle-bg { height: 150px; }
  .enemy-sprite-img { width: 64px; height: 84px; right: 24px; top: 32px; }
  .battle-hero-sprite { width: 52px; height: 70px; bottom: 10px; left: 20px; }
  .enemy-hp-bar { right: 10px; top: 6px; width: 100px; }
  .hero-battle-hp { left: 8px; top: 6px; padding: 4px 7px; min-width: 115px; }
  .hero-battle-hp .hp-track { width: 60px; }

  .battle-panel { padding: 10px; gap: 10px; }
  .question-box { font-size: 12px; padding: 12px 14px; }
  .choices { gap: 6px; }

  .zone-desc { font-size: 10px; }
  .zone-name { font-size: 7px; }
  .zone-icon { font-size: 32px; }

  .levelup-badge { font-size: 56px; }
  .levelup-title { font-size: 14px; }
  .final-score-num { font-size: 28px; }
}

/* ============================
   RESPONSIVE — PHONE (≤420px)
   ============================ */
@media (max-width: 420px) {
  body {
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
  }
  .screen { padding: 6px; }

  .pixel-title { font-size: 13px; }
  .title-sub { font-size: 7px; margin-bottom: 20px; }
  .title-sprite { width: 44px; height: 60px; margin-bottom: 16px; }
  .title-story { font-size: 10px; padding: 10px 12px; line-height: 1.6; max-width: 100%; margin-bottom: 20px; }
  .zones-preview { gap: 6px; margin-bottom: 20px; }
  .zone-chip { font-size: 5px; padding: 6px 8px; gap: 3px; }
  .zone-chip span { font-size: 9px; }
  .btn-pixel { font-size: 9px; padding: 10px 16px; min-height: 44px; min-width: 44px; }

  .map-header { font-size: 8px; }
  .map-subtitle { font-size: 10px; }
  .map-status { padding: 8px 10px; gap: 8px; flex-wrap: wrap; }
  .map-sprite { width: 22px; height: 30px; }
  .status-name { font-size: 5px; }
  .hp-label { font-size: 5px; }
  .hp-num { font-size: 5px; }
  .hp-track { height: 8px; }
  .score-label { font-size: 5px; }
  .score-val { font-size: 10px; }
  .map-zone { padding: 10px 12px; gap: 12px; }
  .zone-icon { font-size: 26px; }
  .zone-name { font-size: 6px; }
  .zone-desc { font-size: 9px; line-height: 1.4; }
  .replay-badge { font-size: 5px; padding: 1px 5px; }

  /* Battle — compact layout */
  .battle-bg { height: 130px; }
  .enemy-sprite-img { width: 52px; height: 68px; right: 10px; top: 28px; }
  .battle-hero-sprite { width: 42px; height: 56px; bottom: 6px; left: 12px; }
  .enemy-hp-bar { right: 4px; top: 4px; width: 80px; }
  .enemy-hp-label { font-size: 4px; }
  .enemy-hp-track { height: 5px; }
  .hero-battle-hp { left: 4px; top: 4px; padding: 3px 5px; min-width: 100px; border-width: 1px; }
  .hero-battle-hp-label { font-size: 4px; margin-bottom: 2px; }
  .hero-battle-hp .hp-track { width: 48px; height: 5px; }
  .hero-battle-hp .hp-num { font-size: 4px; }

  .battle-panel { padding: 8px; gap: 7px; }
  .battle-zone-tag { font-size: 5px; padding: 3px 7px; }
  .question-progress { font-size: 5px; }
  .question-box { font-size: 11px; padding: 10px 12px; line-height: 1.5; }
  .choices { grid-template-columns: 1fr; gap: 5px; }
  .choice-btn { font-size: 11px; padding: 10px; line-height: 1.4; }
  .choice-letter { font-size: 7px; }
  .explanation-box { font-size: 10px; padding: 8px 12px; }
  .key-hint { font-size: 5px; }
  .key-hint kbd { font-size: 5px; padding: 1px 3px; }

  /* Level up / Victory */
  .levelup-badge { font-size: 44px; }
  .levelup-title { font-size: 11px; }
  .levelup-sub, .xp-gained, .hp-recovered { font-size: 10px; max-width: 90%; }
  .stats-gained { gap: 8px; }
  .stat-badge { font-size: 6px; padding: 8px 10px; }
  .stat-badge .val { font-size: 16px; }
  .victory-title { font-size: 12px; }
  .final-score-num { font-size: 24px; }
  .final-score-box { padding: 14px 20px; }
  .final-grade { font-size: 7px; padding: 5px 10px; }
  .trophy-row { font-size: 22px; }
  .credits-text { font-size: 9px; max-width: 90%; }
  .gameover-title { font-size: 18px; }
  .gameover-msg { font-size: 11px; max-width: 90%; }

  .slash-effect { font-size: 32px; }

  /* Adjust attack animations for smaller screen */
  @keyframes heroChargeAttack {
    0%   { transform: translateX(0) rotate(0); }
    20%  { transform: translateX(60px) rotate(-3deg); }
    40%  { transform: translateX(160px) rotate(-8deg); }
    50%  { transform: translateX(180px) rotate(-8deg); }
    60%  { transform: translateX(160px) rotate(-8deg); }
    85%  { transform: translateX(20px) rotate(2deg); }
    100% { transform: translateX(0) rotate(0); }
  }
  @keyframes enemyChargeAttack {
    0%   { transform: translateX(0) scaleX(1); }
    15%  { transform: translateX(-40px) scaleX(1.1); }
    35%  { transform: translateX(-130px) scaleX(1.15); }
    55%  { transform: translateX(-110px) scaleX(1.1); }
    75%  { transform: translateX(-15px) scaleX(1); }
    100% { transform: translateX(0) scaleX(1); }
  }
}