* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: "Poppins", sans-serif;
}

body {
  background: linear-gradient(135deg, #82246c, #4a148c);
  color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.container {
  text-align: center;
  background: rgba(255, 255, 255, 0.08);
  padding: 30px 40px;
  border-radius: 20px;
  backdrop-filter: blur(10px);
  box-shadow: 0 0 20px rgba(241, 225, 3, 0.986);
  animation: fadeIn 1.2s ease-in-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: scale(0.9); }
  to { opacity: 1; transform: scale(1); }
}

h1 {
  margin-bottom: 20px;
  font-size: 3.5rem;
  background: linear-gradient(90deg, #06f1dd, #03ff14);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.scoreboard {
  display: flex;
  justify-content: space-around;
  font-size: 1.5rem;
  margin-bottom: 20px;
  font-weight: 300;
  color: #fafa03;
  text-shadow: 0 0 4px #00ffff;
}

.board {
  display: grid;
  grid-template-columns: repeat(3, 100px);
  grid-template-rows: repeat(3, 100px);
  gap: 18px;
  justify-content: center;
  margin-bottom: 20px;
}

.cell {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 20px;
  font-size: 3.5rem;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.2);
}

.cell:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: scale(1.05);
  box-shadow: 0 0 15px #00e5ff;
}

.cell.animated {
  animation: popIn 0.4s ease;
}

@keyframes popIn {
  0% { transform: scale(0); opacity: 0; }
  70% { transform: scale(1.2); opacity: 1; }
  100% { transform: scale(1); }
}

.winning {
  background: linear-gradient(45deg, #76ff03, #00e5ff);
  color: #000;
  box-shadow: 0 0 25px #00e5ff;
  animation: glow 1.2s infinite alternate;
}

@keyframes glow {
  from { box-shadow: 0 0 10px #00e5ff; }
  to { box-shadow: 0 0 30px #76ff03; }
}

.message {
  margin-bottom: 15px;
  font-size: 1.2rem;
  font-weight: 500;
}

button {
  background: linear-gradient(90deg, #1b63c7b7, #03ffeefd);
  color: #000;
  padding: 10px 25px;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: bold;
  cursor: pointer;
  transition: 0.3s;
  box-shadow: 0 0 10px #ff002f;
}

button:hover {
  transform: scale(1.05);
  background: linear-gradient(90deg, #ff0374, #ff0040);
  box-shadow: 0 0 10px #cdff03;
}