:root {
  --bg-dark: #000000;
  --bg-light: #0a0a0a;
  --primary: #5e6ad2;
  --primary-glow: rgba(94, 106, 210, 0.5);
  --secondary: #22d3ee;
  --text-main: #ededed;
  --text-muted: #666666;
  --glass-bg: rgba(12, 12, 18, 0.75);
  --glass-border: rgba(255, 255, 255, 0.07);
  --glass-border-hover: rgba(255, 255, 255, 0.14);
  --prestige-gold: #f5a623;
  --panel-width: 380px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: "Inter", sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-main);
  min-height: 100vh;
  overflow: hidden;
  user-select: none;
}

/* ── Background Canvas ── */
.bg-canvas {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: -2;
  pointer-events: none;
}

/* ── Scanline overlay for CRT depth ── */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.08) 2px,
    rgba(0, 0, 0, 0.08) 4px
  );
  z-index: 1;
  pointer-events: none;
  animation: scanlineShift 8s linear infinite;
}
@keyframes scanlineShift {
  from {
    background-position: 0 0;
  }
  to {
    background-position: 0 40px;
  }
}

/* ── Vignette ── */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  background: radial-gradient(
    ellipse at 50% 50%,
    transparent 40%,
    rgba(0, 0, 0, 0.55) 100%
  );
  z-index: 0;
  pointer-events: none;
}

/* ── Ambient orbs ── */
.bg-orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(140px);
  z-index: -1;
  opacity: 0.18;
  pointer-events: none;
  animation: floatOrb 25s infinite alternate ease-in-out;
}
.orb-1 {
  width: 60vw;
  height: 60vw;
  background: var(--primary);
  top: -30%;
  left: -20%;
  animation-duration: 28s;
}
.orb-2 {
  width: 50vw;
  height: 50vw;
  background: #8b5cf6;
  bottom: -30%;
  right: -20%;
  animation-duration: 22s;
  animation-delay: -6s;
}
.orb-3 {
  width: 35vw;
  height: 35vw;
  background: #06b6d4;
  top: 40%;
  left: 30%;
  animation-duration: 35s;
  animation-delay: -12s;
}
@keyframes floatOrb {
  from {
    transform: translate(0, 0) scale(1);
  }
  to {
    transform: translate(10vw, 10vh) scale(1.25);
  }
}

/* ── Flash Overlay ── */
#flashOverlay {
  position: fixed;
  inset: 0;
  background: white;
  opacity: 0;
  pointer-events: none;
  z-index: 2000;
}

/* ════════════════════════════════
   TOP-LEFT INFO PANEL
════════════════════════════════ */
.info-panel {
  position: fixed;
  top: 24px;
  left: 24px;
  width: 340px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 20px 24px;
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  box-shadow:
    0 20px 60px rgba(0, 0, 0, 0.5),
    inset 0 1px 0 rgba(255, 255, 255, 0.05);
  z-index: 200;
}

.game-brand {
  font-family: "Outfit", sans-serif;
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  animation: brandBreath 3s ease-in-out infinite;
  text-shadow: 0 0 20px rgba(94, 106, 210, 0.4);
}
@keyframes brandBreath {
  0%,
  100% {
    text-shadow:
      0 0 20px rgba(94, 106, 210, 0.3),
      0 0 40px rgba(94, 106, 210, 0.1);
    filter: brightness(1);
  }
  50% {
    text-shadow:
      0 0 30px rgba(94, 106, 210, 0.6),
      0 0 60px rgba(94, 106, 210, 0.25);
    filter: brightness(1.15);
  }
}
.brand-pro {
  font-size: 0.65rem;
  font-weight: 700;
  background: linear-gradient(
    135deg,
    rgba(94, 106, 210, 0.2),
    rgba(168, 177, 255, 0.1)
  );
  border: 1px solid rgba(94, 106, 210, 0.3);
  padding: 2px 8px;
  border-radius: 6px;
  color: #a8b1ff;
  letter-spacing: 2px;
  vertical-align: middle;
  text-shadow: 0 0 8px rgba(168, 177, 255, 0.5);
}
.text-glow {
  background: linear-gradient(120deg, #7c83e8, #c4cbff, #5e6ad2, #a8b1ff);
  background-size: 300% 100%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: textGlowShift 4s ease-in-out infinite;
}
@keyframes textGlowShift {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

.stats-row {
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--glass-border);
  border-radius: 14px;
  overflow: hidden;
  margin-bottom: 12px;
  padding: 12px 14px 10px;
}
.essence-block {
  border-bottom: 1px solid var(--glass-border);
  padding-bottom: 10px;
  margin-bottom: 2px;
  text-align: center;
}
.stats-sub-row {
  display: flex;
  align-items: center;
}
.stat-block {
  flex: 1;
  padding: 4px 8px;
  text-align: center;
}
.stat-label {
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  margin-bottom: 3px;
}
.stat-value {
  font-family: "Outfit", sans-serif;
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--text-main);
}
/* Big Essence number */
.stat-essence {
  font-size: 2.2rem;
  letter-spacing: -2px;
  background: linear-gradient(120deg, #fff 40%, #a8b1ff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
}
.stat-value.accent {
  color: var(--secondary);
}
.stat-divider {
  width: 1px;
  height: 28px;
  background: var(--glass-border);
}

/* Stage Progress Bar */
.stage-progress-wrapper {
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  padding: 8px 10px;
  margin-bottom: 10px;
}
.stage-progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}
.stage-progress-title {
  font-size: 0.58rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
}
.stage-progress-track {
  height: 5px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 5px;
  overflow: hidden;
  margin-bottom: 4px;
}
.stage-progress-fill {
  height: 100%;
  width: 10%;
  background: linear-gradient(90deg, var(--primary), #a8b1ff);
  border-radius: 5px;
  transition: width 0.4s ease;
  box-shadow: 0 0 8px var(--primary-glow);
}
.stage-progress-label {
  font-size: 0.62rem;
  color: var(--text-muted);
  text-align: right;
  letter-spacing: 0.5px;
}

.combo-display {
  font-family: "Outfit", sans-serif;
  font-size: 0.9rem;
  font-weight: 700;
  color: #f59e0b;
  text-shadow: 0 0 12px rgba(245, 158, 11, 0.6);
  opacity: 0;
  transition:
    opacity 0.3s,
    transform 0.1s;
  text-align: center;
  min-height: 24px;
}

/* Prestige inline */
.prestige-panel {
  margin-top: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(245, 166, 35, 0.08);
  border: 1px solid rgba(245, 166, 35, 0.3);
  border-radius: 12px;
  padding: 10px 14px;
  animation: fadeIn 0.5s;
}
.prestige-label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--prestige-gold);
}
.prestige-btn-small {
  background: linear-gradient(135deg, #f5a623, #d97706);
  color: #000;
  font-family: "Outfit", sans-serif;
  font-weight: 800;
  font-size: 0.8rem;
  padding: 6px 14px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
}
.prestige-btn-small:hover {
  box-shadow: 0 0 20px rgba(245, 166, 35, 0.5);
  transform: scale(1.04);
}

/* ════════════════════════════════
   FLOATING STAGE NAME (JS positions it)
════════════════════════════════ */
.floating-stage-name {
  position: fixed;
  font-family: "Outfit", sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.55);
  letter-spacing: 3px;
  text-transform: uppercase;
  pointer-events: none;
  z-index: 49;
  white-space: nowrap;
  transform: translateX(-50%);
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.8);
  transition:
    left 0.3s ease-out,
    top 0.3s ease-out;
}

/* ════════════════════════════════
   FLOATING HP BAR (JS positions it)
════════════════════════════════ */
.floating-hp {
  position: fixed;
  width: 160px;
  pointer-events: none;
  z-index: 49;
  transform: translateX(-50%);
  transition:
    left 0.3s ease-out,
    top 0.3s ease-out;
}
.hp-track {
  width: 100%;
  height: 8px;
  background: rgba(0, 0, 0, 0.6);
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  position: relative;
}
/* Trailing damage bar (white/yellow delayed bar behind real HP) */
.hp-trail {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 100%;
  background: linear-gradient(
    90deg,
    rgba(251, 191, 36, 0.7),
    rgba(255, 255, 255, 0.5)
  );
  border-radius: 10px;
  transition: width 0.8s ease-out 0.2s;
  z-index: 0;
}
.hp-fill {
  position: relative;
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, #ef4444, #f97316);
  border-radius: 10px;
  transition: width 0.15s cubic-bezier(0, 0, 0.2, 1);
  box-shadow: 0 0 8px rgba(239, 68, 68, 0.6);
  z-index: 1;
}
.hp-text {
  text-align: center;
  font-size: 0.65rem;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.5);
  margin-top: 3px;
  letter-spacing: 1px;
}
.boss-timer {
  text-align: center;
  color: #ef4444;
  font-weight: 800;
  font-family: "Outfit", sans-serif;
  font-size: 0.9rem;
  margin-bottom: 4px;
  text-shadow: 0 0 8px rgba(239, 68, 68, 0.5);
}

/* ════════════════════════════════
   CUSTOM WEAPON CURSOR
════════════════════════════════ */
body {
  cursor: none !important;
}

.weapon-cursor {
  position: fixed;
  width: 64px;
  height: 64px;
  pointer-events: none;
  z-index: 9999;
  transform-origin: 75% 75%; /* หมุนรอบจุดจับ (มือ) */
  transform: rotate(-30deg);
  transition: transform 0.08s ease-out;
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.6));
  will-change: transform, left, top;
}
.weapon-cursor img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}
/* เวลากดคลิก — ยกขึ้นก่อน */
.weapon-cursor.raise {
  animation: weaponRaise 0.08s ease-out forwards;
}
/* เวลาปล่อย — ตีลงแรงๆ */
.weapon-cursor.strike {
  animation: weaponStrike 0.18s cubic-bezier(0.2, 0, 0.4, 1) forwards;
}

@keyframes weaponRaise {
  0% {
    transform: rotate(-30deg) translate(0, 0);
  }
  100% {
    transform: rotate(-75deg) translate(-6px, -8px);
  }
}
@keyframes weaponStrike {
  0% {
    transform: rotate(-75deg) translate(-6px, -8px);
  }
  50% {
    transform: rotate(25deg) translate(8px, 10px);
  }
  75% {
    transform: rotate(10deg) translate(4px, 5px);
  }
  100% {
    transform: rotate(-30deg) translate(0, 0);
  }
}

/* ════════════════════════════════
   MONSTER BUTTON
   mix-blend-mode: screen → black BG disappears on dark game canvas
   ตัวมอนสเตอร์ลอยอยู่บน background ใน Dark theme
════════════════════════════════ */
.ai-core {
  width: 200px;
  height: 200px;
  border-radius: 0;
  background-color: transparent;
  background-size: contain;
  background-position: center;
  background-repeat: no-repeat;
  border: none;
  cursor: none;
  position: fixed;
  outline: none;
  z-index: 50;
  mix-blend-mode: screen;
  /* Radial mask: fades black edges to transparent smoothly */
  -webkit-mask-image: radial-gradient(
    ellipse 75% 75% at 50% 50%,
    #000 45%,
    transparent 72%
  );
  mask-image: radial-gradient(
    ellipse 75% 75% at 50% 50%,
    #000 45%,
    transparent 72%
  );
  filter: drop-shadow(0 0 22px rgba(94, 106, 210, 0.8))
    drop-shadow(0 0 44px rgba(94, 106, 210, 0.35)) saturate(1.2) brightness(1.1);
  transition:
    left 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94),
    top 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94),
    filter 0.2s;
}
.ai-core:active {
  filter: brightness(2.2) drop-shadow(0 0 50px rgba(255, 120, 50, 1));
  transform: scale(0.8);
}

/* Biome-specific monster glow — transitions smoothly */
body.theme-forest .ai-core {
  filter: drop-shadow(0 0 22px rgba(16, 185, 129, 1))
    drop-shadow(0 0 55px rgba(16, 185, 129, 0.4)) saturate(1.2);
}
body.theme-volcano .ai-core {
  filter: drop-shadow(0 0 22px rgba(244, 63, 94, 1))
    drop-shadow(0 0 55px rgba(244, 63, 94, 0.4)) saturate(1.2);
}
body.theme-void .ai-core {
  filter: drop-shadow(0 0 22px rgba(139, 92, 246, 1))
    drop-shadow(0 0 55px rgba(139, 92, 246, 0.4)) saturate(1.2);
}
body.theme-cyber .ai-core {
  filter: drop-shadow(0 0 22px rgba(6, 182, 212, 1))
    drop-shadow(0 0 55px rgba(6, 182, 212, 0.4)) saturate(1.2);
}

/* ── Ground Shadow Aura under monster ── */
.monster-ground-shadow {
  position: fixed;
  width: 180px;
  height: 30px;
  pointer-events: none;
  z-index: 44;
  border-radius: 50%;
  background: radial-gradient(
    ellipse,
    rgba(94, 106, 210, 0.5) 0%,
    rgba(94, 106, 210, 0.15) 40%,
    transparent 70%
  );
  filter: blur(8px);
  transform: translateX(-50%);
  transition:
    left 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94),
    top 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  animation: groundShadowPulse 2.5s ease-in-out infinite;
}
@keyframes groundShadowPulse {
  0%,
  100% {
    opacity: 0.6;
    transform: translateX(-50%) scaleX(1);
  }
  50% {
    opacity: 0.9;
    transform: translateX(-50%) scaleX(1.15);
  }
}
body.theme-forest .monster-ground-shadow {
  background: radial-gradient(
    ellipse,
    rgba(16, 185, 129, 0.5) 0%,
    transparent 70%
  );
}
body.theme-volcano .monster-ground-shadow {
  background: radial-gradient(
    ellipse,
    rgba(244, 63, 94, 0.5) 0%,
    transparent 70%
  );
}
body.theme-void .monster-ground-shadow {
  background: radial-gradient(
    ellipse,
    rgba(139, 92, 246, 0.5) 0%,
    transparent 70%
  );
}
body.theme-cyber .monster-ground-shadow {
  background: radial-gradient(
    ellipse,
    rgba(6, 182, 212, 0.5) 0%,
    transparent 70%
  );
}

/* Animation สำหรับมอนสเตอร์เกิดใหม่ */
.monster-spawn {
  animation: monsterEntrance 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275)
    forwards;
}

@keyframes monsterEntrance {
  0% {
    opacity: 0;
    transform: scale(0.3) rotate(-10deg);
  }
  100% {
    opacity: 1;
    transform: scale(1) rotate(0deg);
  }
}

/* ════════════════════════════════
   MONSTER AURA (bright pulsing glow)
════════════════════════════════ */
.monster-aura {
  position: fixed;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  pointer-events: none;
  z-index: 45;
  transform: translate(-50%, -50%);
  background: radial-gradient(
    circle,
    rgba(94, 106, 210, 0.55) 0%,
    rgba(94, 106, 210, 0.15) 50%,
    transparent 75%
  );
  animation: auraBreath 2.5s ease-in-out infinite;
  transition:
    left 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94),
    top 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.monster-aura.aura-boss {
  width: 320px;
  height: 320px;
  background: radial-gradient(
    circle,
    rgba(245, 166, 35, 0.6) 0%,
    rgba(245, 166, 35, 0.2) 50%,
    transparent 75%
  );
  animation: auraBreath 1.2s ease-in-out infinite;
}
body.theme-forest .monster-aura {
  background: radial-gradient(
    circle,
    rgba(16, 185, 129, 0.5) 0%,
    rgba(16, 185, 129, 0.15) 50%,
    transparent 75%
  );
}
body.theme-volcano .monster-aura {
  background: radial-gradient(
    circle,
    rgba(244, 63, 94, 0.5) 0%,
    rgba(244, 63, 94, 0.15) 50%,
    transparent 75%
  );
}
body.theme-void .monster-aura {
  background: radial-gradient(
    circle,
    rgba(139, 92, 246, 0.5) 0%,
    rgba(139, 92, 246, 0.15) 50%,
    transparent 75%
  );
}
body.theme-cyber .monster-aura {
  background: radial-gradient(
    circle,
    rgba(6, 182, 212, 0.5) 0%,
    rgba(6, 182, 212, 0.15) 50%,
    transparent 75%
  );
}
@keyframes auraBreath {
  0%,
  100% {
    opacity: 0.7;
    transform: translate(-50%, -50%) scale(1);
  }
  50% {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1.12);
  }
}

/* ════════════════════════════════
   RIGHT PANEL: UPGRADES
════════════════════════════════ */
.upgrades-panel {
  position: fixed;
  top: 0;
  right: 0;
  width: var(--panel-width);
  height: 100vh;
  background: var(--glass-bg);
  border-left: 1px solid var(--glass-border);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  display: flex;
  flex-direction: column;
  padding: 24px 20px;
  box-shadow: -20px 0 60px rgba(0, 0, 0, 0.4);
  z-index: 200;
}

.upgrades-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--glass-border);
}
.section-title {
  font-family: "Outfit", sans-serif;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.3px;
}

.upgrades-list {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-right: 4px;
}
.upgrades-list::-webkit-scrollbar {
  width: 4px;
}
.upgrades-list::-webkit-scrollbar-track {
  background: transparent;
}
.upgrades-list::-webkit-scrollbar-thumb {
  background: var(--glass-border);
  border-radius: 10px;
}
.upgrades-list::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.15);
}

.upgrade-wrapper {
  position: relative;
}
.upgrade-btn {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--glass-border);
  padding: 12px 14px;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.22s ease;
  color: var(--text-main);
  text-align: left;
  position: relative;
  overflow: hidden;
}
/* Shimmer sweep on hover */
.upgrade-btn::after {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.08),
    transparent
  );
  transition: left 0.5s ease;
  pointer-events: none;
}
.upgrade-btn:hover:not(:disabled)::after {
  left: 150%;
}
.upgrade-btn:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(94, 106, 210, 0.4);
  box-shadow:
    0 4px 20px rgba(94, 106, 210, 0.15),
    0 0 1px rgba(94, 106, 210, 0.5),
    inset 0 1px 0 rgba(255, 255, 255, 0.05);
  transform: translateY(-1px);
}
.upgrade-btn:active:not(:disabled) {
  transform: scale(0.97);
}
.upgrade-btn:disabled {
  opacity: 0.28;
  cursor: not-allowed;
  filter: grayscale(1);
}

.upgrade-info h3 {
  font-size: 0.95rem;
  margin-bottom: 2px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
}
.upgrade-icon {
  font-size: 1.1rem;
  line-height: 1;
}
.upgrade-info p {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.upgrade-price {
  font-family: "Outfit", sans-serif;
  font-weight: 700;
  font-size: 0.9rem;
  padding: 5px 10px;
  border-radius: 8px;
  border: 1px solid var(--glass-border);
  background: rgba(0, 0, 0, 0.4);
  color: var(--text-main);
  white-space: nowrap;
  transition: all 0.15s;
}
.cost-red {
  color: #ef4444;
  background: rgba(239, 68, 68, 0.1) !important;
  border-color: rgba(239, 68, 68, 0.2) !important;
}
.cost-green {
  color: #10b981;
  background: rgba(16, 185, 129, 0.1) !important;
  border-color: rgba(16, 185, 129, 0.2) !important;
}

.upgrade-count {
  position: absolute;
  top: -7px;
  right: -7px;
  background: var(--primary);
  color: #fff;
  font-family: "Outfit", sans-serif;
  font-weight: 800;
  font-size: 0.75rem;
  min-width: 22px;
  height: 22px;
  padding: 0 4px;
  border-radius: 11px;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 2;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
}

/* ════════════════════════════════
   BOTTOM CENTER: SKILL BAR
════════════════════════════════ */
.skills-container {
  position: fixed;
  bottom: 28px;
  left: calc(50% - var(--panel-width) / 2);
  transform: translateX(-50%);
  display: flex;
  gap: 12px;
  z-index: 200;
  padding: 12px 16px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-radius: 18px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}
.skill-btn {
  width: 70px;
  height: 70px;
  border-radius: 14px;
  border: 1px solid var(--glass-border);
  background: rgba(255, 255, 255, 0.04);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
  position: relative;
  overflow: hidden;
  gap: 2px;
}
.skill-btn:not(:disabled):hover {
  background: rgba(255, 255, 255, 0.09);
  transform: translateY(-4px);
  border-color: var(--primary);
  box-shadow: 0 8px 20px rgba(94, 106, 210, 0.3);
}
.skill-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  filter: grayscale(1);
}
.skill-btn .icon {
  font-size: 1.6rem;
  line-height: 1;
}
.skill-btn .skill-label {
  font-size: 0.55rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  text-transform: uppercase;
}
.skill-btn .skill-cd {
  font-family: "Outfit", sans-serif;
  font-size: 0.7rem;
  font-weight: 800;
  color: #ef4444;
  position: absolute;
  top: 4px;
  right: 6px;
}
.skill-btn .cooldown-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 0%;
  background: rgba(0, 0, 0, 0.55);
  transition: height 0.1s linear;
}
.skill-btn.active {
  border-color: #f5a623;
  box-shadow: 0 0 20px rgba(245, 166, 35, 0.4);
  animation: pulse 0.8s infinite;
}
@keyframes pulse {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.04);
  }
}

/* ════════════════════════════════
   FLOATING NUMBER
════════════════════════════════ */
.floating-number {
  position: fixed;
  font-family: "Outfit", sans-serif;
  font-size: 1.6rem;
  font-weight: 800;
  pointer-events: none;
  animation: floatUp 0.9s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
  text-shadow: 0 0 12px var(--primary);
  z-index: 100;
}
@keyframes floatUp {
  0% {
    transform: translateY(0) scale(1);
    opacity: 1;
  }
  50% {
    transform: translateY(-55px) scale(1.15);
    opacity: 0.9;
  }
  100% {
    transform: translateY(-100px) scale(0.8);
    opacity: 0;
  }
}

/* ════════════════════════════════
   GOLDEN BUG
════════════════════════════════ */
.golden-bug {
  position: fixed;
  width: 65px;
  height: 65px;
  background: radial-gradient(circle, #fbbf24 0%, #d97706 100%);
  border-radius: 50%;
  box-shadow:
    0 0 35px #f59e0b,
    inset 0 0 12px #fff;
  cursor: pointer;
  z-index: 100;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 1.8rem;
  transition: transform 0.1s;
}
.golden-bug:hover {
  transform: scale(1.15);
}

/* ════════════════════════════════
   PARTICLE EFFECTS
════════════════════════════════ */
.particle {
  position: fixed;
  pointer-events: none;
  border-radius: 50%;
  z-index: 99;
  animation: particleOut 0.6s ease-out forwards;
}
@keyframes particleOut {
  0% {
    transform: translate(0, 0) scale(1);
    opacity: 1;
  }
  100% {
    transform: translate(var(--tx), var(--ty)) scale(0);
    opacity: 0;
  }
}

/* ════════════════════════════════
   MONSTER ANIMATIONS
════════════════════════════════ */
.monster-hit {
  animation: monsterHit 0.12s cubic-bezier(0, 0, 0.2, 1);
}
@keyframes monsterHit {
  0% {
    transform: scale(1);
  }
  30% {
    transform: scale(0.78, 1.22);
  }
  60% {
    transform: scale(1.22, 0.78);
  }
  100% {
    transform: scale(1);
  }
}
.shake {
  animation: shake 0.2s cubic-bezier(0.36, 0.07, 0.19, 0.97) both;
}
@keyframes shake {
  10%,
  90% {
    transform: translate3d(-1px, 0, 0);
  }
  20%,
  80% {
    transform: translate3d(2px, 0, 0);
  }
  30%,
  50%,
  70% {
    transform: translate3d(-4px, 0, 0);
  }
  40%,
  60% {
    transform: translate3d(4px, 0, 0);
  }
}
.earthquake {
  animation: earthquake 0.3s cubic-bezier(0.36, 0.07, 0.19, 0.97) both;
}
@keyframes earthquake {
  0% {
    transform: translate(28px, 18px) rotate(-3deg);
    filter: blur(2px);
  }
  20% {
    transform: translate(-28px, -18px) rotate(3deg);
    filter: blur(0px);
  }
  40% {
    transform: translate(18px, 28px) rotate(-2deg);
    filter: blur(2px);
  }
  60% {
    transform: translate(-18px, -28px) rotate(2deg);
    filter: blur(0px);
  }
  80% {
    transform: translate(8px, 8px) rotate(-1deg);
    filter: blur(1px);
  }
  100% {
    transform: translate(0, 0) rotate(0);
    filter: blur(0px);
  }
}
.hit-stop {
  filter: brightness(2.2) contrast(1.5) hue-rotate(90deg)
    drop-shadow(0 0 40px red) !important;
  transform: scale(1.25) !important;
  transition: none !important;
}
.flash-anim {
  animation: flashEffect 0.25s ease-out;
}
@keyframes flashEffect {
  0% {
    opacity: 0.6;
  }
  100% {
    opacity: 0;
  }
}

/* ════════════════════════════════
   BIOME THEMES (dark-compatible)
════════════════════════════════ */
body.theme-forest {
  --primary: #10b981;
  --primary-glow: rgba(16, 185, 129, 0.4);
}
body.theme-forest .orb-1 {
  background: #064e3b;
}
body.theme-forest .orb-2 {
  background: #065f46;
}

body.theme-volcano {
  --primary: #f43f5e;
  --primary-glow: rgba(244, 63, 94, 0.4);
}
body.theme-volcano .orb-1 {
  background: #7f1d1d;
}
body.theme-volcano .orb-2 {
  background: #991b1b;
}

body.theme-void {
  --primary: #8b5cf6;
  --primary-glow: rgba(139, 92, 246, 0.4);
}
body.theme-void .orb-1 {
  background: #2e1065;
}
body.theme-void .orb-2 {
  background: #4c1d95;
}

body.theme-cyber {
  --primary: #06b6d4;
  --primary-glow: rgba(6, 182, 212, 0.4);
}
body.theme-cyber .orb-1 {
  background: #0c4a6e;
}
body.theme-cyber .orb-2 {
  background: #164e63;
}

/* ════════════════════════════════
   PRESTIGE
════════════════════════════════ */
.prestige-btn {
  background: linear-gradient(135deg, #fbbf24, #d97706);
  color: #000;
  font-weight: 800;
  border: none;
  box-shadow: 0 0 20px rgba(251, 191, 36, 0.4);
}
.prestige-btn:hover {
  box-shadow: 0 0 35px rgba(251, 191, 36, 0.6);
  transform: scale(1.04) translateY(-2px);
}

/* ════════════════════════════════
   OFFLINE MODAL
════════════════════════════════ */
.offline-modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(10px);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 1000;
}
.offline-modal.active {
  display: flex;
  animation: fadeIn 0.3s;
}
.offline-content {
  background: rgba(12, 12, 18, 0.95);
  border: 1px solid var(--primary);
  padding: 3rem;
  border-radius: 20px;
  text-align: center;
  box-shadow: 0 0 60px var(--primary-glow);
  max-width: 90%;
}
.offline-content h2 {
  font-family: "Outfit", sans-serif;
  font-size: 2.2rem;
  margin-bottom: 0.8rem;
}
.offline-content p {
  color: var(--text-muted);
  margin-bottom: 1.2rem;
}
.offline-earnings {
  font-family: "Outfit", sans-serif;
  font-size: 3rem;
  color: #10b981;
  font-weight: 800;
  margin-bottom: 2rem;
  text-shadow: 0 0 20px rgba(16, 185, 129, 0.4);
}
.claim-btn {
  background: var(--primary);
  color: #fff;
  font-family: "Outfit", sans-serif;
  font-size: 1.1rem;
  font-weight: 800;
  padding: 1rem 3rem;
  border: none;
  border-radius: 14px;
  cursor: pointer;
  transition:
    transform 0.1s,
    box-shadow 0.2s;
}
.claim-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 25px var(--primary-glow);
}
.claim-btn:active {
  transform: translateY(0);
}

/* ════════════════════════════════
   RESET BUTTON
════════════════════════════════ */
.reset-btn {
  position: fixed;
  bottom: 20px;
  left: 20px;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.06);
  color: var(--text-muted);
  padding: 6px 16px;
  border-radius: 10px;
  cursor: pointer;
  z-index: 1000;
  font-family: "Inter", sans-serif;
  font-size: 0.75rem;
  transition: all 0.2s;
}
.reset-btn:hover {
  border-color: #ef4444;
  color: #ef4444;
}

/* ════════════════════════════════
   FADE-IN ANIMATION
════════════════════════════════ */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: scale(0.94);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* ════════════════════════════════
   RESPONSIVE (Mobile)
════════════════════════════════ */
@media (max-width: 768px) {
  :root {
    --panel-width: 0px;
  }
  body {
    overflow-y: auto;
  }
  .upgrades-panel {
    position: relative;
    width: 100%;
    height: auto;
    border-left: none;
    border-top: 1px solid var(--glass-border);
  }
  .info-panel {
    position: relative;
    top: auto;
    left: auto;
    width: 100%;
    border-radius: 0;
  }
  .skills-container {
    left: 50%;
  }
}

/* ════════════════════════════════
   GOLD RUSH SYSTEM
════════════════════════════════ */
.gold-rush-active {
  animation: goldPulse 2s infinite alternate;
  position: relative;
}
.gold-rush-active::after {
  content: "";
  position: fixed;
  inset: 0;
  background: radial-gradient(
    circle,
    transparent 40%,
    rgba(251, 191, 36, 0.15) 100%
  );
  pointer-events: none;
  z-index: 1000;
}
@keyframes goldPulse {
  from {
    filter: sepia(0) saturate(1);
  }
  to {
    filter: sepia(0.3) saturate(1.5) brightness(1.1);
  }
}

#goldRushNotice {
  position: fixed;
  top: 120px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, #fbbf24, #f59e0b);
  color: #000;
  padding: 8px 24px;
  border-radius: 40px;
  font-weight: 900;
  font-size: 1.2rem;
  box-shadow: 0 0 30px rgba(251, 191, 36, 0.6);
  z-index: 2000;
  display: none;
  pointer-events: none;
  letter-spacing: 2px;
  text-transform: uppercase;
}
.gold-rush-active #goldRushNotice {
  display: block;
  animation: bounceIn 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
@keyframes bounceIn {
  0% {
    transform: translateX(-50%) scale(0);
  }
  70% {
    transform: translateX(-50%) scale(1.2);
  }
  100% {
    transform: translateX(-50%) scale(1);
  }
}