:root {
  --primary-color: #FFD700; /* Gold */
  --secondary-color: #8B0000; /* Dark Red */
  --dark-bg-1: #0a0a0a; /* Deep black */
  --dark-bg-2: #1a1a2e; /* Deep blue-purple */
  --dark-bg-3: #16213e; /* Darker blue */
  --dark-bg-4: #0f1c2e; /* Even darker blue */

  /* Neon colors derived from primary/secondary for smart配色 */
  --neon-gold: #FFD700;
  --neon-red: #FF1744; /* Bright red */
  --neon-cyan: #00FFFF; /* Bright cyan for accent */
  --neon-magenta: #FF00FF; /* Bright magenta for accent */
  --neon-green: #00FF00; /* Bright green for accent */

  /* Dynamic color variables for animations */
  --neon-primary-anim: var(--neon-gold);
  --neon-secondary-anim: var(--neon-red);
  --neon-accent-anim: var(--neon-cyan);

  /* Header heights for content padding */
  --header-top-height: 60px;
  --main-nav-height: 50px;
  --mobile-nav-buttons-height: 50px;
}

/* Base styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Arial', sans-serif;
  background-color: var(--dark-bg-4);
  color: #e0e0e0;
  line-height: 1.6;
  padding-top: calc(var(--header-top-height) + var(--main-nav-height)); /* Desktop padding */
}

/* Neon Glow Animations */
@keyframes rainbow-border {
  0% { border-color: #ff0000; box-shadow: 0 0 10px #ff0000, 0 0 20px #ff0000; }
  16.6% { border-color: #ff8000; box-shadow: 0 0 10px #ff8000, 0 0 20px #ff8000; }
  33.3% { border-color: #ffff00; box-shadow: 0 0 10px #ffff00, 0 0 20px #ffff00; }
  50% { border-color: #00ff00; box-shadow: 0 0 10px #00ff00, 0 0 20px #00ff00; }
  66.6% { border-color: #0000ff; box-shadow: 0 0 10px #0000ff, 0 0 20px #0000ff; }
  83.3% { border-color: #8000ff; box-shadow: 0 0 10px #8000ff, 0 0 20px #8000ff; }
  100% { border-color: #ff0000; box-shadow: 0 0 10px #ff0000, 0 0 20px #ff0000; }
}

@keyframes hue-spin {
  0% { filter: hue-rotate(0deg); box-shadow: 0 0 10px var(--neon-primary-anim), 0 0 20px var(--neon-primary-anim); }
  100% { filter: hue-rotate(360deg); box-shadow: 0 0 10px var(--neon-primary-anim), 0 0 20px var(--neon-primary-anim); }
}

@keyframes alternate-colors {
  0% { border-color: var(--neon-primary-anim); box-shadow: 0 0 10px var(--neon-primary-anim), 0 0 20px var(--neon-primary-anim); }
  100% { border-color: var(--neon-secondary-anim); box-shadow: 0 0 10px var(--neon-secondary-anim), 0 0 20px var(--neon-secondary-anim); }
}

@keyframes gradient-flow {
  0% { background-position: 0% 50%; box-shadow: 0 0 10px #ff0000, 0 0 20px #ff8000; }
  50% { background-position: 100% 50%; box-shadow: 0 0 10px #00ffff, 0 0 20px #0000ff; }
  100% { background-position: 0% 50%; box-shadow: 0 0 10px #ff0000, 0 0 20px #ff8000; }
}

@keyframes random-glow {
  0% { border-color: #ff00ff; box-shadow: 0 0 20px #ff00ff; }
  20% { border-color: #00ffff; box-shadow: 0 0 20px #00ffff; }
  40% { border-color: #ffff00; box-shadow: 0 0 20px #ffff00; }
  60% { border-color: #00ff00; box-shadow: 0 0 20px #00ff00; }
  80% { border-color: #ff0000; box-shadow: 0 0 20px #ff0000; }
  100% { border-color: #ff00ff; box-shadow: 0 0 20px #ff00ff; }
}

@keyframes theme-colors {
  0%, 100% {
    border-color: var(--neon-primary-anim);
    box-shadow:
      0 0 10px var(--neon-primary-anim),
      0 0 20px var(--neon-primary-anim),
      inset 0 0 10px rgba(255, 215, 0, 0.3); /* Gold tint */
  }
  33% {
    border-color: var(--neon-secondary-anim);
    box-shadow:
      0 0 10px var(--neon-secondary-anim),
      0 0 20px var(--neon-secondary-anim),
      inset 0 0 10px rgba(255, 23, 68, 0.3); /* Red tint */
  }
  66% {
    border-color: var(--neon-accent-anim);
    box-shadow:
      0 0 10px var(--neon-accent-anim),
      0 0 20px var(--neon-accent-anim),
      inset 0 0 10px rgba(0, 255, 255, 0.3); /* Cyan tint */
  }
}

@keyframes neon-flicker {
  0%, 19%, 21%, 23%, 25%, 54%, 56%, 100% {
    opacity: 1;
    box-shadow:
      0 0 10px currentColor,
      0 0 20px currentColor,
      0 0 30px currentColor,
      inset 0 0 15px currentColor;
  }
  20%, 24%, 55% {
    opacity: 0.8;
    box-shadow:
      0 0 5px currentColor,
      0 0 10px currentColor,
      0 0 15px currentColor,
      inset 0 0 10px currentColor;
  }
}

@keyframes pulse-glow {
  from {
    box-shadow:
      0 0 5px currentColor,
      0 0 10px currentColor;
  }
  to {
    box-shadow:
      0 0 15px currentColor,
      0 0 30px currentColor,
      0 0 45px currentColor;
  }
}

@keyframes led-blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0.3; }
}

@keyframes text-glow-flow {
  0% {
    text-shadow:
      0 0 5px var(--neon-primary-anim),
      0 0 10px var(--neon-primary-anim),
      0 0 15px var(--neon-primary-anim);
    color: #ffffff;
  }
  50% {
    text-shadow:
      0 0 5px var(--neon-secondary-anim),
      0 0 10px var(--neon-secondary-anim),
      0 0 15px var(--neon-secondary-anim);
    color: #ffffff;
  }
  100% {
    text-shadow:
      0 0 5px var(--neon-accent-anim),
      0 0 10px var(--neon-accent-anim),
      0 0 15px var(--neon-accent-anim);
    color: #ffffff;
  }
}

/* Neon Glow Styles */
.neon-glow {
  box-shadow:
    0 0 5px currentColor,
    0 0 10px currentColor,
    0 0 15px currentColor,
    0 0 20px currentColor,
    inset 0 0 10px rgba(255, 255, 255, 0.1);
}

.neon-tube {
  border: 2px solid;
  animation: neon-flicker 2s infinite alternate, theme-colors 4s linear infinite;
}

.cyber-grid {
  background:
    linear-gradient(90deg, transparent 95%, currentColor 100%),
    linear-gradient(180deg, transparent 95%, currentColor 100%);
  background-size: 20px 20px;
  border: 1px solid;
  animation: hue-spin 4s linear infinite;
}

.neon-pulse {
  animation: pulse-glow 2s ease-in-out infinite alternate, theme-colors 4s ease-in-out infinite;
}

.rainbow-flow {
  border: 2px solid;
  animation: rainbow-border 3s linear infinite;
}

.hue-rotate {
  border: 2px solid;
  filter: hue-rotate(0deg);
  animation: hue-spin 4s linear infinite;
}

.alternate-glow {
  border: 2px solid;
  animation: alternate-colors 2s ease-in-out infinite alternate;
}

.color-stream {
  position: relative;
  border: 2px solid transparent;
  background: linear-gradient(45deg,
    #ff0000, #ff8000, #ffff00, #00ff00,
    #00ffff, #0000ff, #8000ff, #ff0080
  );
  background-size: 400% 400%;
  animation: gradient-flow 3s ease infinite;
}

.random-colors {
  border: 2px solid;
  animation: random-glow 5s linear infinite;
}

.theme-flow {
  border: 2px solid;
  animation: theme-colors 4s ease-in-out infinite;
}

.led-matrix {
  border: 2px solid;
  box-shadow:
    0 0 5px currentColor,
    0 0 10px currentColor;
  position: relative;
  animation: random-glow 5s linear infinite;
}

.led-matrix::before {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background:
    radial-gradient(circle at 0% 0%, currentColor 2px, transparent 3px),
    radial-gradient(circle at 100% 0%, currentColor 2px, transparent 3px),
    radial-gradient(circle at 0% 100%, currentColor 2px, transparent 3px),
    radial-gradient(circle at 100% 100%, currentColor 2px, transparent 3px);
  background-size: 20px 20px;
  animation: led-blink 1s steps(2) infinite;
}

.neon-text-dynamic {
  animation: text-glow-flow 3s ease-in-out infinite alternate;
}

/* Header Styles */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  display: block; /* Desktop default */
}

.header-top {
  background: linear-gradient(135deg, var(--dark-bg-1), var(--dark-bg-2));
  border-bottom: 2px solid var(--neon-primary-anim);
  box-shadow:
    0 0 10px var(--neon-primary-anim),
    0 0 20px var(--neon-primary-anim),
    0 0 30px var(--neon-primary-anim),
    inset 0 0 20px rgba(255, 215, 0, 0.1);
  animation: theme-colors 4s ease-in-out infinite; /* Apply dynamic border color */
  padding: 10px 0;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 20px;
  min-height: var(--header-top-height);
}

.logo {
  font-size: 2.2em;
  font-weight: bold;
  text-decoration: none;
  color: #ffffff; /* Base color for text-shadow */
  text-transform: uppercase;
  letter-spacing: 2px;
  line-height: 1;
  animation: text-glow-flow 3s ease-in-out infinite alternate; /* Dynamic text glow */
}

.desktop-nav-buttons {
  display: flex;
  gap: 12px;
}

.btn {
  position: relative;
  background: linear-gradient(135deg, var(--neon-primary-anim), var(--neon-secondary-anim));
  padding: 10px 25px;
  color: #ffffff;
  text-decoration: none;
  border-radius: 5px;
  font-weight: bold;
  text-shadow: 0 0 5px #ffffff, 0 0 10px var(--neon-primary-anim);
  transition: all 0.3s ease;
  border: 2px solid;
  animation: theme-colors 4s ease-in-out infinite; /* Dynamic border glow */
  white-space: nowrap;
}

.btn:hover {
  animation-duration: 2s; /* Faster animation on hover */
  transform: translateY(-2px);
  box-shadow: 0 0 15px var(--neon-primary-anim), 0 0 30px var(--neon-primary-anim), inset 0 0 15px rgba(255, 215, 0, 0.5);
}

.main-nav {
  background: linear-gradient(135deg, var(--dark-bg-2), var(--dark-bg-3));
  border-top: 2px solid var(--neon-secondary-anim);
  border-bottom: 2px solid var(--neon-secondary-anim);
  box-shadow:
    0 0 10px var(--neon-secondary-anim),
    0 0 20px var(--neon-secondary-anim),
    0 0 30px var(--neon-secondary-anim),
    inset 0 0 20px rgba(255, 23, 68, 0.1);
  animation: theme-colors 4s ease-in-out infinite reverse; /* Dynamic border color, reversed animation for distinction */
  width: 100%;
  display: flex; /* Desktop default */
  justify-content: center;
  align-items: center;
  min-height: var(--main-nav-height);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: row; /* Desktop default */
  justify-content: center;
  align-items: center;
  padding: 10px 20px;
  width: 100%;
}

.nav-link {
  color: #e0e0e0;
  text-decoration: none;
  padding: 8px 15px;
  font-weight: bold;
  transition: color 0.3s ease, text-shadow 0.3s ease;
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--neon-gold);
  text-shadow: 0 0 5px var(--neon-gold), 0 0 10px var(--neon-gold);
}

.hamburger-menu, .mobile-nav-buttons, .mobile-menu-overlay {
  display: none; /* Hidden by default on desktop */
}

/* Footer Styles */
.site-footer {
  background-color: var(--dark-bg-1);
  color: #a0a0a0;
  padding: 40px 0 20px 0;
  font-size: 0.9em;
}

.footer-top {
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding-bottom: 30px;
  margin-bottom: 30px;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 30px;
}

.footer-col h4 {
  color: #ffffff;
  margin-bottom: 15px;
  font-size: 1.1em;
  white-space: nowrap;
}

.footer-logo {
  font-size: 1.8em;
  font-weight: bold;
  color: var(--primary-color);
  text-decoration: none;
  margin-bottom: 10px;
  display: block;
  text-transform: uppercase;
}

.footer-description {
  line-height: 1.6;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.footer-nav {
  list-style: none;
}

.footer-nav li a {
  color: #a0a0a0;
  text-decoration: none;
  padding: 5px 0;
  display: block;
  transition: color 0.3s ease;
  white-space: nowrap;
}

.footer-nav li a:hover {
  color: var(--primary-color);
}

.payment-icons, .game-providers-icons, .social-media-icons {
  display: flex;
  flex-wrap: wrap;
  flex-direction: row;
  align-items: flex-start;
  gap: 8px;
  width: 100%;
}

.payment-icons img, .game-providers-icons img, .social-media-icons img {
  max-height: 40px; /* Adjusted for better fit in columns */
  height: auto;
  width: auto;
  filter: grayscale(100%) brightness(150%); /* For a retro/cyberpunk feel, adjust as needed */
  opacity: 0.7;
  transition: opacity 0.3s ease, filter 0.3s ease;
}

.payment-icons img:hover, .game-providers-icons img:hover, .social-media-icons img:hover {
  opacity: 1;
  filter: grayscale(0%) brightness(100%);
}

.footer-middle {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  margin-bottom: 20px;
}

.game-providers-section, .social-media-section {
  margin-bottom: 20px;
}

.game-providers-section:last-of-type, .social-media-section:last-of-type {
  margin-bottom: 0;
}

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  text-align: center;
}

.copyright {
  color: #777;
}

/* Mobile Styles */
@media (max-width: 768px) {
  body {
    padding-top: calc(var(--header-top-height) + var(--mobile-nav-buttons-height)); /* Mobile padding */
  }

  .site-header {
    flex-direction: column;
  }

  .header-top {
    padding: 10px 0;
  }

  .header-container {
    width: 100%;
    max-width: none;
    padding: 0 15px;
    justify-content: space-between;
    position: relative;
  }

  .hamburger-menu {
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    width: 30px;
    height: 25px;
    cursor: pointer;
    z-index: 1002;
    position: relative;
    order: 1;
    animation: theme-colors 4s ease-in-out infinite; /* Dynamic border color */
    border-radius: 3px;
    padding: 3px;
  }

  .hamburger-menu .bar {
    width: 100%;
    height: 3px;
    background-color: var(--neon-gold);
    transition: all 0.3s ease-in-out;
    border-radius: 1px;
    box-shadow: 0 0 5px var(--neon-gold);
  }

  .hamburger-menu.active .bar:nth-child(2) {
    opacity: 0;
  }

  .hamburger-menu.active .bar:nth-child(1) {
    transform: translateY(11px) rotate(45deg);
  }

  .hamburger-menu.active .bar:nth-child(3) {
    transform: translateY(-11px) rotate(-45deg);
  }

  .logo {
    flex: 1;
    text-align: center;
    order: 2;
    font-size: 1.8em;
    margin: 0 10px;
  }

  .desktop-nav-buttons {
    display: none;
  }

  .mobile-nav-buttons {
    display: flex;
    justify-content: center;
    gap: 10px;
    padding: 10px 15px;
    background: linear-gradient(135deg, var(--dark-bg-2), var(--dark-bg-3));
    border-bottom: 2px solid var(--neon-magenta);
    box-shadow:
      0 0 8px var(--neon-magenta),
      0 0 15px var(--neon-magenta),
      inset 0 0 10px rgba(255, 0, 255, 0.1);
    animation: theme-colors 4s ease-in-out infinite reverse; /* Dynamic border color */
    z-index: 990; /* Below main-nav when active, above main-nav when main-nav is hidden */
  }

  .mobile-nav-buttons .btn {
    padding: 8px 18px;
    font-size: 0.9em;
  }

  .main-nav {
    display: none; /* Default hidden on mobile */
    position: fixed;
    top: 0;
    left: 0;
    width: 80%;
    max-width: 300px; /* Limit mobile menu width */
    height: 100vh;
    background: var(--dark-bg-3);
    flex-direction: column;
    justify-content: flex-start;
    align-items: flex-start;
    transform: translateX(-100%);
    transition: transform 0.3s ease-in-out;
    z-index: 1001;
    padding-top: 60px; /* Offset for header-top */
    border-right: 2px solid var(--neon-cyan);
    box-shadow:
      0 0 10px var(--neon-cyan),
      0 0 20px var(--neon-cyan),
      inset 0 0 15px rgba(0, 255, 255, 0.1);
    animation: theme-colors 4s ease-in-out infinite; /* Dynamic border color */
  }

  .main-nav.active {
    display: flex; /* Display when active */
    transform: translateX(0);
  }

  .nav-container {
    flex-direction: column;
    padding: 20px 0;
    width: 100%;
    max-width: none;
  }

  .nav-link {
    width: 100%;
    text-align: left;
    padding: 12px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }

  .nav-link:last-child {
    border-bottom: none;
  }

  .mobile-menu-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 999;
    transition: opacity 0.3s ease-in-out;
    opacity: 0;
  }

  .mobile-menu-overlay.active {
    display: block;
    opacity: 1;
  }

  .footer-container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-col h4 {
    margin-top: 20px;
  }

  .footer-nav li a {
    display: inline-block;
    margin: 0 5px;
  }

  .payment-icons, .game-providers-icons, .social-media-icons {
    justify-content: center;
  }
}

/* Ensure body scroll is managed */
body.no-scroll {
  overflow: hidden;
}