:root {
  --primary-color: #00ff00;
  --background-color: #0c0c0c;
  --header-bg-color: #0a0a0a;
  --nav-link-color: #00ff00;
  --nav-link-hover-bg: #00ff00;
  --nav-link-hover-color: #000000;
  --balance-bg: #003300;
  --balance-color: #00ff00;
  --font-family: 'Poppins', sans-serif;
  --font-size: 16px;
  --btn-bg-color: #00ff00;
  --btn-bg-hover: #80ff80;
  --footer-color: #004400;
  --main-padding: 20px;
}

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

body {
  font-family: var(--font-family);
  background-color: var(--background-color);
  color: var(--primary-color);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-size: var(--font-size);
}

/* Header */
header {
  background-color: var(--header-bg-color);
  padding: 20px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 0 30px var(--primary-color);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.logo {
  font-weight: 900;
  font-size: 2rem;
  text-shadow: 0 0 15px var(--primary-color);
  letter-spacing: 2px;
}

nav a {
  color: var(--nav-link-color);
  margin: 0 20px;
  text-decoration: none;
  font-weight: 600;
  font-size: 1.1rem;
  padding: 6px 12px;
  border-radius: 8px;
  transition: all 0.3s ease;
}

nav a.active,
nav a:hover {
  background-color: var(--nav-link-hover-bg);
  color: var(--nav-link-hover-color);
  box-shadow: 0 0 15px var(--primary-color);
}

.balance {
  background-color: var(--balance-bg);
  padding: 10px 20px;
  border-radius: 12px;
  font-weight: 700;
  box-shadow: 0 0 25px var(--primary-color);
  font-size: 1.1rem;
  color: var(--balance-color);
}

/* Main content */
main {
  flex-grow: 1;
  max-width: 1200px;
  margin: 40px auto 60px auto;
  padding: 0 var(--main-padding);
}

/* Hero Section */
.hero-section {
  background: linear-gradient(90deg, rgba(0,255,0,0.2), rgba(0,255,0,0.05));
  border-radius: 25px;
  padding: 60px 30px;
  text-align: center;
  box-shadow: 0 0 40px var(--primary-color);
  margin-bottom: 60px;
}

.hero-section h1 {
  font-size: 3rem;
  text-shadow: 0 0 30px var(--primary-color);
  margin-bottom: 20px;
  font-weight: 900;
}

.hero-section p {
  font-size: 1.5rem;
  margin-bottom: 35px;
  color: #80ff80;
  text-shadow: 0 0 10px var(--primary-color);
}

.btn {
  background-color: var(--btn-bg-color);
  color: #000;
  padding: 18px 40px;
  font-weight: 700;
  text-decoration: none;
  font-size: 1.25rem;
  border-radius: 25px;
  box-shadow: 0 0 30px var(--primary-color);
  transition: background-color 0.3s ease;
  cursor: pointer;
  display: inline-block;
}

.btn:hover {
  background-color: var(--btn-bg-hover);
  box-shadow: 0 0 50px var(--btn-bg-hover);
}

/* Games Section */
.games-section h2 {
  margin-bottom: 30px;
  font-size: 2rem;
  text-align: center;
  text-shadow: 0 0 20px var(--primary-color);
}

.games-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 35px;
}

.game-card {
  background: #111;
  border-radius: 25px;
  padding: 60px 0;
  font-weight: 800;
  font-size: 1.5rem;
  color: var(--primary-color);
  text-align: center;
  cursor: pointer;
  box-shadow: 0 0 25px var(--primary-color);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  user-select: none;
}

.game-card:hover {
  transform: scale(1.1);
  box-shadow: 0 0 45px var(--btn-bg-hover);
}

/* Footer */
footer {
  text-align: center;
  padding: 25px;
  font-size: 0.9rem;
  color: var(--footer-color);
  text-shadow: 0 0 10px var(--primary-color);
}