:root {
  --primary-color: #0A2463; /* Website main color */
  --secondary-color: #FFD700; /* Website accent color */

  --neon-primary: var(--secondary-color); /* Use accent for primary neon glow */
  --neon-secondary: #FF00FF; /* Pink/Magenta for contrast */
  --neon-accent: #00FFFF; /* Cyan for another contrast */
  --neon-text-color: #FFFFFF; /* White for text inside glow */
  --dark-bg-1: #0a0a0a;
  --dark-bg-2: #1a1a2e;
  --dark-bg-3: #16213e;
  --header-top-bg: linear-gradient(135deg, var(--dark-bg-1), var(--dark-bg-2));
  --main-nav-bg: linear-gradient(135deg, var(--dark-bg-2), var(--dark-bg-3));
  --btn-bg: linear-gradient(135deg, var(--neon-primary), var(--neon-secondary));
}

/* Keyframes for dynamic glow effects */
@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), 0 0 20px var(--neon-primary);
  }
  100% {
    filter: hue-rotate(360deg);
    box-shadow: 0 0 10px var(--neon-primary), 0 0 20px var(--neon-primary);
  }
}

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

@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);
    box-shadow: 
      0 0 10px var(--neon-primary),
      0 0 20px var(--neon-primary),
      inset 0 0 10px rgba(255, 215, 0, 0.1);
  }
  33% {
    border-color: var(--neon-secondary);
    box-shadow: 
      0 0 10px var(--neon-secondary),
      0 0 20px var(--neon-secondary),
      inset 0 0 10px rgba(255, 0, 255, 0.1);
  }
  66% {
    border-color: var(--neon-accent);
    box-shadow: 
      0 0 10px var(--neon-accent),
      0 0 20px var(--neon-accent),
      inset 0 0 10px rgba(0, 255, 255, 0.1);
  }
}

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

/* Base styles */
body {
  margin: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: var(--dark-bg-1);
  color: #e0e0e0;
  line-height: 1.6;
  padding-top: 110px; /* Default for desktop header (header-top + main-nav) */
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
}

/* Header Top - Desktop */
.header-top {
  background: var(--header-top-bg);
  border-bottom: 2px solid;
  padding: 10px 0;
  animation: theme-colors 4s ease-in-out infinite; /* Apply dynamic color to border/shadow */
}

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

.logo {
  font-size: 2.2em;
  font-weight: bold;
  text-decoration: none;
  color: var(--neon-text-color);
  animation: text-glow-flow 3s ease-in-out infinite alternate; /* Apply dynamic text glow */
  text-transform: uppercase;
  letter-spacing: 1px;
}

.desktop-nav-buttons {
  display: flex;
  gap: 10px;
  align-items: center;
}

.btn {
  position: relative;
  background: var(--btn-bg);
  padding: 12px 25px;
  color: #ffffff;
  text-decoration: none;
  border-radius: 5px;
  border: 2px solid;
  animation: theme-colors 4s ease-in-out infinite; /* Apply dynamic color to border/shadow */
  text-shadow: 
    0 0 5px #ffffff,
    0 0 10px var(--neon-primary);
  transition: all 0.3s ease;
  font-weight: bold;
  white-space: nowrap;
  cursor: pointer;
}

.btn:hover {
  animation-duration: 2s; /* Faster animation on hover */
  transform: translateY(-2px);
  box-shadow: 
    0 0 15px var(--neon-primary),
    0 0 30px var(--neon-primary),
    inset 0 0 15px rgba(255, 215, 0, 0.2);
}

.hamburger-menu {
  display: none; /* Hidden on desktop */
  cursor: pointer;
  padding: 10px;
  z-index: 1001;
  flex-shrink: 0;
  margin-right: 15px;
}

.hamburger-menu .bar {
  width: 30px;
  height: 3px;
  background-color: var(--neon-primary);
  margin: 6px 0;
  transition: 0.4s;
  box-shadow: 0 0 5px var(--neon-primary), 0 0 10px var(--neon-primary);
  animation: theme-colors 4s ease-in-out infinite;
}

/* Main Navigation - Desktop */
.main-nav {
  background: var(--main-nav-bg);
  border-top: 2px solid;
  border-bottom: 2px solid;
  padding: 10px 0;
  animation: theme-colors 4s ease-in-out infinite reverse; /* Different animation direction for contrast */
  display: flex; /* Default for desktop (visible, horizontal) */
  flex-direction: row;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 25px;
  padding: 0 20px;
}

.nav-link {
  color: #e0e0e0;
  text-decoration: none;
  font-size: 1.1em;
  padding: 8px 15px;
  transition: color 0.3s, text-shadow 0.3s;
  white-space: nowrap;
}

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

.mobile-nav-buttons {
  display: none; /* Hidden on desktop */
}

.mobile-menu-overlay {
  display: none; /* Hidden on desktop */
}

/* Footer styles */
.site-footer {
  background-color: #1c1c1c;
  color: #cccccc;
  padding: 40px 0 20px;
  font-size: 0.9em;
  border-top: 1px solid #333;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  margin-bottom: 40px;
}

.footer-col h4 {
  color: #ffffff;
  font-size: 1.2em;
  margin-bottom: 15px;
  border-bottom: 2px solid var(--secondary-color);
  padding-bottom: 5px;
  display: inline-block;
}

.footer-logo {
  font-size: 1.8em;
  font-weight: bold;
  color: var(--secondary-color);
  text-decoration: none;
  margin-bottom: 15px;
  display: block;
  text-transform: capitalize; /* 'game tài xỉu' for footer, not all caps */
}

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

.footer-nav {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-nav li a {
  color: #cccccc;
  text-decoration: none;
  padding: 5px 0;
  display: block;
}

.footer-nav li a:hover {
  color: var(--secondary-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: 50px;
  height: auto;
  width: auto;
  object-fit: contain;
  filter: grayscale(100%) brightness(150%); /* Make icons fit the dark theme */
  transition: filter 0.3s ease;
}

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

.footer-middle-sections {
  margin-top: 30px;
  border-top: 1px solid #333;
  padding-top: 30px;
}

.game-providers-section, .social-media-section {
  margin-bottom: 30px;
}

.footer-bottom {
  margin-top: 40px;
  border-top: 1px solid #333;
  padding-top: 20px;
  text-align: center;
  color: #999999;
}

/* Mobile Styles */
@media (max-width: 768px) {
  body {
    padding-top: 130px; /* Adjust for mobile header (header-top + mobile-nav-buttons) */
  }

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

  .header-container {
    padding: 0 15px;
    justify-content: space-between;
    position: relative; /* For z-index context */
  }

  .hamburger-menu {
    display: block;
    order: 1;
    z-index: 1002; /* Above logo and buttons */
  }

  .logo {
    order: 2;
    flex: 1;
    text-align: center;
    font-size: 1.8em;
    margin: 0; /* Remove any desktop margins */
  }

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

  .mobile-nav-buttons {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 10px 15px;
    background: var(--header-top-bg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    border-bottom: 2px solid;
    animation: theme-colors 4s ease-in-out infinite;
    z-index: 999; /* Below hamburger menu, above main content */
  }

  .mobile-nav-buttons .btn {
    flex-grow: 1;
    text-align: center;
    font-size: 0.9em;
    padding: 10px 15px;
  }

  .main-nav {
    display: none; /* Hidden by default for mobile */
    position: fixed;
    top: 110px; /* Height of header-top (~60px) + mobile-nav-buttons (~50px) */
    left: 0;
    width: 80%;
    max-width: 300px; /* Limit sidebar width */
    height: calc(100vh - 110px); /* Adjust height to fill remaining viewport */
    flex-direction: column;
    transform: translateX(-100%); /* Slide out */
    transition: transform 0.3s ease-in-out;
    background: var(--main-nav-bg);
    border-right: 2px solid;
    animation: theme-colors 4s ease-in-out infinite reverse;
    overflow-y: auto;
    padding: 20px 0;
    z-index: 1000;
  }

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

  .nav-container {
    flex-direction: column;
    gap: 15px;
    padding: 0 15px;
    align-items: flex-start;
    width: 100%;
    max-width: none; /* Crucial: ensures container takes full width */
  }

  .nav-link {
    width: 100%;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: 10px 0;
  }

  .mobile-menu-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 990;
    transition: opacity 0.3s ease-in-out;
    opacity: 0;
  }

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

  .body-no-scroll {
    overflow: hidden;
  }

  .hamburger-menu.active .bar1 {
    transform: translateY(9px) rotate(45deg);
  }
  .hamburger-menu.active .bar2 {
    opacity: 0;
  }
  .hamburger-menu.active .bar3 {
    transform: translateY(-9px) rotate(-45deg);
  }

  .footer-top-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .footer-col:not(:first-child) {
    margin-top: 20px;
  }

  .footer-logo,
  .footer-description,
  .footer-nav li a,
  .footer-col h4 {
    text-align: center;
  }
  .footer-col h4 {
    width: 100%;
  }
  .payment-icons, .game-providers-icons, .social-media-icons {
    justify-content: center;
  }
}