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

body {
  background: radial-gradient(circle at top, #1e3a8a, #0f172a 70%);
  font-family: 'Segoe UI', sans-serif;
  color: white;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  overflow: hidden;
}

.container {
  text-align: center;
  background: rgba(255,255,255,0.08);
  padding: 30px;
  border-radius: 25px;
  backdrop-filter: blur(12px);
  box-shadow: 0 0 40px rgba(0,255,255,0.15);
}

h1 {
  font-size: 3rem;
  color: #67e8f9;
  text-shadow: 0 0 10px #22d3ee, 0 0 20px #06b6d4;
  margin-bottom: 10px;
}

#status {
  font-size: 1.2rem;
  margin-bottom: 20px;
  animation: pulseText 1.5s infinite;
}

.scoreboard {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-bottom: 20px;
  font-size: 1.2rem;
}

.board {
  display: grid;
  grid-template-columns: repeat(3, 120px);
  gap: 12px;
  justify-content: center;
  margin-bottom: 20px;
}

.cell {
  width: 120px;
  height: 120px;
  background: rgba(255,255,255,0.08);
  border: 2px solid rgba(255,255,255,0.15);
  border-radius: 20px;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 3.5rem;
  cursor: pointer;
  transition: all 0.25s ease;
}

.cell:hover {
  transform: scale(1.08);
  box-shadow: 0 0 20px rgba(0,255,255,0.35);
}

.cell.x {
  color: #38bdf8;
  text-shadow: 0 0 10px #38bdf8, 0 0 20px #0ea5e9;
  animation: pop 0.2s ease;
}

.cell.o {
  color: #fb7185;
  text-shadow: 0 0 10px #fb7185, 0 0 20px #f43f5e;
  animation: pop 0.2s ease;
}

.cell.win {
  background: #22c55e;
  color: white;
  box-shadow: 0 0 20px #22c55e, 0 0 40px #16a34a;
  animation: winnerGlow 0.8s infinite alternate;
}

button {
  padding: 14px 28px;
  border: none;
  border-radius: 12px;
  background: linear-gradient(90deg, #2563eb, #06b6d4);
  color: white;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.25s ease;
}

button:hover {
  transform: scale(1.05);
  box-shadow: 0 0 20px #06b6d4;
}

@keyframes pop {
  from {
    transform: scale(0.4);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes winnerGlow {
  from {
    transform: scale(1);
  }
  to {
    transform: scale(1.08);
  }
}

@keyframes pulseText {
  0%,100% {
    opacity: 1;
  }
  50% {
    opacity: 0.6;
  }
}