:root {
  --primary: #0091ff;
  --secondary: #61bedb;
  --bg-dark: #1a1a1a;
  --btn-bg: #2a2a2a;
  --btn-hover: #3c3c3c;
  --text: #ffffff;
  --glow: 0 0 10px rgba(0, 145, 255, 0.7);
}

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

body {
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%), url('chessboard-bg.png');
  background-size: cover;
  background-blend-mode: multiply;
  color: var(--text);
  font-family: "Segoe UI", Arial, sans-serif;
  overflow: hidden;
}

.container {
  text-align: center;
  animation: fadeIn 1.5s ease-in;
}

.title {
  font-size: 3em;
  font-weight: bold;
  text-shadow: var(--glow);
  margin-bottom: 60px;
}

.menu {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.menu-item {
  display: inline-block;
  background-color: var(--btn-bg);
  color: var(--text);
  padding: 15px 60px;
  border-radius: 10px;
  font-size: 1.4em;
  text-decoration: none;
  letter-spacing: 1px;
  transition: all 0.3s ease;
  box-shadow: 0 0 8px rgba(0, 0, 0, 0.4);
}

.menu-item:hover {
  background-color: var(--btn-hover);
  transform: scale(1.05);
  box-shadow: 0 0 20px rgba(97, 190, 219, 0.8);
}

footer {
  margin-top: 80px;
  font-size: 0.9em;
  color: #cccccc;
  opacity: 0.7;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}