/* ============================================================
   赛博万神殿 — Design System (index.css)
   国潮新中式 × Cyberpunk  
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700;900&family=ZCOOL+QingKe+HuangYou&display=swap');

/* ---------- Design Tokens ---------- */
:root {
  /* Backgrounds */
  --bg-void:      #05050a;
  --bg-primary:   #0a0a12;
  --bg-secondary: #10101c;
  --bg-tertiary:  #18182a;
  --bg-card:      rgba(18, 18, 32, 0.75);
  --bg-card-hover:rgba(24, 24, 42, 0.85);

  /* Gold / Warm */
  --gold:         #ffd700;
  --gold-light:   #ffe44d;
  --gold-dark:    #b8960b;
  --gold-glow:    rgba(255, 215, 0, 0.35);
  --red:          #ff3b3b;
  --red-dark:     #c40000;
  --red-silk:     #cc1a1a;
  --red-glow:     rgba(255, 59, 59, 0.3);

  /* Neon / Cool */
  --neon-magenta: #ff006e;
  --neon-cyan:    #00f5d4;
  --neon-purple:  #7b2fbe;
  --neon-blue:    #3a86ff;
  --neon-magenta-glow: rgba(255, 0, 110, 0.3);
  --neon-cyan-glow:    rgba(0, 245, 212, 0.3);

  /* Text */
  --text-primary:   #ece8e1;
  --text-secondary: #8a8698;
  --text-muted:     #555266;
  --text-gold:      #ffd700;

  /* Glass */
  --glass-bg:       rgba(255, 255, 255, 0.04);
  --glass-bg-hover: rgba(255, 255, 255, 0.08);
  --glass-border:   rgba(255, 255, 255, 0.08);
  --glass-border-hover: rgba(255, 255, 255, 0.15);

  /* Spacing scale */
  --sp-1: 4px;  --sp-2: 8px;  --sp-3: 12px; --sp-4: 16px;
  --sp-5: 20px; --sp-6: 24px; --sp-8: 32px; --sp-10: 40px;
  --sp-12: 48px; --sp-16: 64px; --sp-20: 80px;

  /* Radii */
  --r-sm:   8px;
  --r-md:   16px;
  --r-lg:   24px;
  --r-xl:   32px;
  --r-full: 9999px;

  /* Fonts */
  --font-display: 'ZCOOL QingKe HuangYou', 'Noto Sans SC', cursive;
  --font-body:    'Noto Sans SC', system-ui, sans-serif;

  /* Transitions */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring:   cubic-bezier(0.34, 1.56, 0.64, 1);
  --dur-fast:   150ms;
  --dur-normal: 300ms;
  --dur-slow:   500ms;

  /* Z-index layers */
  --z-base:     1;
  --z-card:     10;
  --z-nav:      100;
  --z-overlay:  500;
  --z-modal:    1000;
  --z-particle: 2000;
  --z-toast:    3000;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background: var(--bg-void);
  color: var(--text-primary);
  min-height: 100dvh;
  overflow-x: hidden;
  line-height: 1.6;
}

img, svg { display: block; max-width: 100%; }
button { cursor: pointer; font: inherit; border: none; background: none; color: inherit; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
input, textarea { font: inherit; color: inherit; background: none; border: none; outline: none; }

/* Custom scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--glass-border); border-radius: var(--r-full); }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.15); }

/* ---------- Typography ---------- */
.text-display {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: 0.04em;
}

.text-title  { font-size: clamp(1.5rem, 4vw, 2.5rem); font-weight: 700; }
.text-large  { font-size: clamp(1.1rem, 2.5vw, 1.5rem); font-weight: 500; }
.text-body   { font-size: 1rem; font-weight: 400; }
.text-small  { font-size: 0.875rem; font-weight: 400; }
.text-caption { font-size: 0.75rem; font-weight: 400; color: var(--text-secondary); }

.text-gold   { color: var(--text-gold); }
.text-neon   { 
  background: linear-gradient(135deg, var(--neon-magenta), var(--neon-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ---------- Glass Card ---------- */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(1.3);
  -webkit-backdrop-filter: blur(20px) saturate(1.3);
  border: 1px solid var(--glass-border);
  border-radius: var(--r-md);
}

.glass:hover {
  background: var(--glass-bg-hover);
  border-color: var(--glass-border-hover);
}

.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(24px) saturate(1.4);
  -webkit-backdrop-filter: blur(24px) saturate(1.4);
  border: 1px solid var(--glass-border);
  border-radius: var(--r-lg);
  padding: var(--sp-6);
  transition: all var(--dur-normal) var(--ease-out-expo);
}

.glass-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--glass-border-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}

/* ---------- Neon Glow Effects ---------- */
.glow-gold {
  box-shadow: 0 0 12px var(--gold-glow),
              0 0 48px rgba(255, 215, 0, 0.08);
}

.glow-gold-text {
  text-shadow: 0 0 8px var(--gold-glow),
               0 0 24px rgba(255, 215, 0, 0.15);
}

.glow-neon {
  box-shadow: 0 0 12px var(--neon-magenta-glow),
              0 0 48px rgba(255, 0, 110, 0.08),
              0 0 12px var(--neon-cyan-glow);
}

.glow-red {
  box-shadow: 0 0 12px var(--red-glow),
              0 0 48px rgba(255, 59, 59, 0.08);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  padding: var(--sp-3) var(--sp-6);
  border-radius: var(--r-full);
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: 0.06em;
  transition: all var(--dur-normal) var(--ease-out-expo);
  position: relative;
  overflow: hidden;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  opacity: 0;
  transition: opacity var(--dur-fast);
  background: radial-gradient(circle at center, rgba(255,255,255,0.2), transparent 70%);
}

.btn:active::after { opacity: 1; }

.btn-gold {
  background: linear-gradient(135deg, var(--gold-dark), var(--gold), var(--gold-light));
  color: #1a1400;
  font-weight: 700;
  box-shadow: 0 4px 20px var(--gold-glow);
}

.btn-gold:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 6px 30px var(--gold-glow), 0 0 60px rgba(255, 215, 0, 0.15);
}

.btn-neon {
  background: linear-gradient(135deg, var(--neon-magenta), var(--neon-purple));
  color: #fff;
  font-weight: 500;
  box-shadow: 0 4px 20px var(--neon-magenta-glow);
}

.btn-neon:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 6px 30px var(--neon-magenta-glow), 0 0 60px rgba(255, 0, 110, 0.15);
}

.btn-red {
  background: linear-gradient(135deg, var(--red-dark), var(--red));
  color: #fff;
  font-weight: 500;
  box-shadow: 0 4px 20px var(--red-glow);
}

.btn-red:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 6px 30px var(--red-glow), 0 0 60px rgba(255, 59, 59, 0.1);
}

.btn-glass {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
}

.btn-glass:hover {
  background: var(--glass-bg-hover);
  border-color: var(--glass-border-hover);
  transform: translateY(-1px);
}

.btn-lg { padding: var(--sp-4) var(--sp-8); font-size: 1.15rem; }
.btn-sm { padding: var(--sp-2) var(--sp-4); font-size: 0.85rem; }

.btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  transform: none !important;
}

/* ---------- Tabs ---------- */
.tabs {
  display: flex;
  gap: var(--sp-1);
  padding: var(--sp-1);
  background: var(--glass-bg);
  border-radius: var(--r-full);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
}

.tab {
  padding: var(--sp-2) var(--sp-5);
  border-radius: var(--r-full);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all var(--dur-normal) var(--ease-out-expo);
  white-space: nowrap;
}

.tab:hover {
  background: rgba(255, 255, 255, 0.06);
}

.tab.active {
  background: linear-gradient(135deg, var(--neon-magenta), var(--neon-purple));
  color: #fff;
  box-shadow: 0 2px 12px var(--neon-magenta-glow);
}

/* ---------- Modal / Overlay ---------- */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(5, 5, 10, 0.85);
  backdrop-filter: blur(8px);
  z-index: var(--z-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--dur-normal);
}

.overlay.visible {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--r-xl);
  padding: var(--sp-10);
  max-width: 520px;
  width: 90%;
  text-align: center;
  transform: scale(0.9) translateY(20px);
  transition: transform var(--dur-slow) var(--ease-spring);
  box-shadow: 0 24px 80px rgba(0,0,0,0.5);
}

.overlay.visible .modal {
  transform: scale(1) translateY(0);
}

/* ---------- Input Fields ---------- */
.input-glass {
  width: 100%;
  padding: var(--sp-3) var(--sp-5);
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--r-full);
  color: var(--text-primary);
  font-size: 1rem;
  transition: all var(--dur-normal);
}

.input-glass::placeholder { color: var(--text-muted); }

.input-glass:focus {
  border-color: var(--neon-cyan);
  box-shadow: 0 0 0 3px rgba(0, 245, 212, 0.1);
}

/* ---------- Floating Text Animation ---------- */
.floating-text {
  position: fixed;
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  pointer-events: none;
  z-index: var(--z-toast);
  animation: floatUp 1.8s var(--ease-out-expo) forwards;
  white-space: nowrap;
}

.floating-text.gold   { color: var(--gold); text-shadow: 0 0 12px var(--gold-glow); }
.floating-text.red    { color: var(--red); text-shadow: 0 0 12px var(--red-glow); }
.floating-text.cyan   { color: var(--neon-cyan); text-shadow: 0 0 12px var(--neon-cyan-glow); }
.floating-text.magenta { color: var(--neon-magenta); text-shadow: 0 0 12px var(--neon-magenta-glow); }

@keyframes floatUp {
  0%   { opacity: 1; transform: translateY(0) scale(1); }
  60%  { opacity: 1; }
  100% { opacity: 0; transform: translateY(-120px) scale(1.3); }
}

/* ---------- Scene Container ---------- */
.scene {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  overflow-x: hidden;
  opacity: 0;
  visibility: hidden;
  transform: scale(0.97);
  transition: all var(--dur-slow) var(--ease-out-expo);
  z-index: var(--z-base);
}

.scene.active {
  opacity: 1;
  visibility: visible;
  transform: scale(1);
  z-index: var(--z-card);
}

/* ---------- Particle Canvas ---------- */
#particle-canvas {
  position: fixed;
  inset: 0;
  z-index: var(--z-particle);
  pointer-events: none;
}

/* ---------- Navigation Bar ---------- */
.nav-bar {
  position: fixed;
  bottom: var(--sp-5);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: var(--sp-2);
  padding: var(--sp-2);
  background: rgba(10, 10, 18, 0.8);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  border: 1px solid var(--glass-border);
  border-radius: var(--r-full);
  z-index: var(--z-nav);
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
}

.nav-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: var(--sp-2) var(--sp-4);
  border-radius: var(--r-lg);
  font-size: 0.7rem;
  color: var(--text-secondary);
  transition: all var(--dur-normal) var(--ease-out-expo);
}

.nav-btn .nav-icon { font-size: 1.3rem; }

.nav-btn:hover { 
  color: var(--text-primary); 
  background: rgba(255,255,255,0.05);
}

.nav-btn.active {
  color: var(--gold);
  background: rgba(255, 215, 0, 0.08);
}

/* ---------- Achievement Toast ---------- */
.achievement-toast {
  position: fixed;
  top: var(--sp-6);
  left: 50%;
  transform: translateX(-50%) translateY(-100px);
  padding: var(--sp-3) var(--sp-6);
  background: linear-gradient(135deg, rgba(255, 215, 0, 0.15), rgba(255, 0, 110, 0.1));
  backdrop-filter: blur(20px);
  border: 1px solid var(--gold);
  border-radius: var(--r-full);
  font-family: var(--font-display);
  color: var(--gold);
  z-index: var(--z-toast);
  white-space: nowrap;
  box-shadow: 0 0 20px var(--gold-glow);
  transition: transform var(--dur-slow) var(--ease-spring);
}

.achievement-toast.show {
  transform: translateX(-50%) translateY(0);
}

/* ---------- Badge / Pill ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px var(--sp-3);
  border-radius: var(--r-full);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.badge-gold {
  background: linear-gradient(135deg, var(--gold-dark), var(--gold));
  color: #1a1400;
}

.badge-neon {
  background: linear-gradient(135deg, var(--neon-magenta), var(--neon-purple));
  color: #fff;
}

/* ---------- Keyframe Animations ---------- */

/* Breathing / pulsing glow */
@keyframes breathe {
  0%, 100% { opacity: 0.6; filter: brightness(1); }
  50%      { opacity: 1;   filter: brightness(1.2); }
}

/* Neon border flicker */
@keyframes neonFlicker {
  0%, 100% { box-shadow: 0 0 6px var(--gold-glow), 0 0 24px rgba(255,215,0,0.08); }
  25%      { box-shadow: 0 0 12px var(--gold-glow), 0 0 48px rgba(255,215,0,0.15); }
  50%      { box-shadow: 0 0 4px var(--gold-glow), 0 0 16px rgba(255,215,0,0.06); }
  75%      { box-shadow: 0 0 16px var(--gold-glow), 0 0 56px rgba(255,215,0,0.18); }
}

/* Slow rotation (for halos) */
@keyframes slowSpin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

/* Pulse scale */
@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50%      { transform: scale(1.06); }
}

/* Ripple effect */
@keyframes ripple {
  0%   { transform: scale(0.8); opacity: 0.6; }
  100% { transform: scale(2.5); opacity: 0; }
}

/* Shake */
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%      { transform: translateX(-4px) rotate(-1deg); }
  40%      { transform: translateX(4px) rotate(1deg); }
  60%      { transform: translateX(-3px) rotate(-0.5deg); }
  80%      { transform: translateX(3px) rotate(0.5deg); }
}

/* Confetti fall */
@keyframes confettiFall {
  0%   { transform: translateY(-10vh) rotate(0deg); opacity: 1; }
  100% { transform: translateY(110vh) rotate(720deg); opacity: 0.3; }
}

/* Lantern rise */
@keyframes lanternRise {
  0%   { transform: translateY(0) scale(1); opacity: 1; }
  80%  { opacity: 0.7; }
  100% { transform: translateY(-100vh) scale(0.4); opacity: 0; }
}

/* Slide in from bottom */
@keyframes slideUp {
  from { transform: translateY(40px); opacity: 0; }
  to   { transform: translateY(0); opacity: 1; }
}

/* Fade in */
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* Supply fly to altar */
@keyframes flyToAltar {
  0%   { transform: translate(0, 0) scale(1); opacity: 1; }
  50%  { transform: translate(var(--fly-x, 0px), var(--fly-y, -100px)) scale(0.7); opacity: 0.8; }
  100% { transform: translate(var(--fly-x, 0px), var(--fly-y, -200px)) scale(0.3); opacity: 0; }
}

/* Incense smoke sway */
@keyframes smokeSway {
  0%, 100% { transform: translateX(0) scaleX(1); }
  25%      { transform: translateX(5px) scaleX(1.05); }
  75%      { transform: translateX(-5px) scaleX(0.95); }
}

/* Red cloth unveil */
@keyframes unveilCloth {
  0%   { clip-path: inset(0 0 0 0); transform: scaleY(1); }
  40%  { clip-path: inset(0 0 0 0); transform: scaleY(1) translateY(-10px); }
  100% { clip-path: inset(0 100% 0 0); transform: scaleY(0.6) translateY(-60px) rotate(8deg); opacity: 0; }
}

/* Coin spin */
@keyframes coinSpin {
  0%   { transform: rotateY(0deg); }
  100% { transform: rotateY(1080deg); }
}

/* ---------- Utility ---------- */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-col { flex-direction: column; }

.gap-1 { gap: var(--sp-1); } .gap-2 { gap: var(--sp-2); }
.gap-3 { gap: var(--sp-3); } .gap-4 { gap: var(--sp-4); }
.gap-6 { gap: var(--sp-6); } .gap-8 { gap: var(--sp-8); }

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  :root {
    --sp-6: 16px;
    --sp-8: 24px;
    --sp-10: 32px;
  }

  .nav-bar { 
    bottom: var(--sp-3); 
    gap: 0;
  }

  .nav-btn { padding: var(--sp-2) var(--sp-3); }

  .modal { padding: var(--sp-6); }
}

@media (max-width: 480px) {
  .tabs { 
    overflow-x: auto; 
    -webkit-overflow-scrolling: touch;
  }

  .btn-lg { padding: var(--sp-3) var(--sp-6); font-size: 1rem; }
}