@import url("https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700;900&display=swap");

:root {
  --cor-fundo: #0a0015;
  --cor-roxo: #6b2fb5;
  --cor-roxo-escuro: #4a1f7f;
  --cor-laranja: #ff6b35;
  --cor-laranja-claro: #ff8c61;
  --cor-neon-roxo: #b794f6;
  --cor-neon-laranja: #ffaa80;
}

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

body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: linear-gradient(
    135deg,
    var(--cor-fundo) 0%,
    #1a0a2e 50%,
    #09090cff 100%
  );
  color: white;
  font-family: "Orbitron", monospace;
  padding: 20px;
  position: relative;
  overflow: hidden;
}

body::before {
  content: "";
  position: absolute;
  width: 200%;
  height: 200%;
  background-image: repeating-linear-gradient(
      0deg,
      transparent,
      transparent 2px,
      var(--cor-roxo) 2px,
      var(--cor-roxo) 3px
    ),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 2px,
      var(--cor-roxo) 2px,
      var(--cor-roxo) 3px
    );
  opacity: 0.05;
  animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
  0% {
    transform: translate(0, 0);
  }
  100% {
    transform: translate(50px, 50px);
  }
}

h1 {
  font-size: 3rem;
  font-weight: 900;
  background: linear-gradient(
    45deg,
    var(--cor-laranja),
    var(--cor-neon-laranja),
    var(--cor-roxo),
    var(--cor-neon-roxo)
  );
  background-size: 300% 300%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradientShift 3s ease infinite;
  text-shadow: 0 0 30px rgba(255, 107, 53, 0.5);
  margin-bottom: 10px;
  position: relative;
  z-index: 1;
  letter-spacing: 3px;
}

@keyframes gradientShift {
  0%,
  100% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
}

#informacoes {
  min-height: 50px;
  margin: 20px auto;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--cor-neon-laranja);
  text-align: center;
  text-shadow: 0 0 10px var(--cor-laranja);
  position: relative;
  z-index: 1;
  letter-spacing: 1px;
}

.controls {
  display: flex;
  gap: 20px;
  align-items: center;
  margin-bottom: 30px;
  position: relative;
  z-index: 1;
}

#iniciar {
  font-family: "Orbitron", monospace;
  font-size: 1.2rem;
  font-weight: bold;
  background: linear-gradient(135deg, var(--cor-laranja), var(--cor-roxo));
  border: 3px solid var(--cor-neon-laranja);
  padding: 12px 30px;
  border-radius: 10px;
  color: white;
  cursor: pointer;
  transition: all 0.3s ease;
  text-transform: uppercase;
  letter-spacing: 2px;
  box-shadow: 0 0 20px rgba(255, 107, 53, 0.5),
    inset 0 0 20px rgba(255, 255, 255, 0.1);
  position: relative;
  overflow: hidden;
}

#iniciar::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

#iniciar:hover::before {
  width: 300px;
  height: 300px;
}

#iniciar:hover {
  transform: scale(1.05) translateY(-2px);
  box-shadow: 0 0 30px var(--cor-laranja),
    inset 0 0 20px rgba(255, 255, 255, 0.2);
  border-color: var(--cor-neon-roxo);
}

#iniciar:active {
  transform: scale(0.95);
}

.tamanho-container {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(107, 47, 181, 0.2);
  padding: 10px 20px;
  border-radius: 10px;
  border: 2px solid var(--cor-roxo);
  box-shadow: 0 0 15px rgba(107, 47, 181, 0.3);
}

.tamanho-container span {
  font-weight: 700;
  color: var(--cor-neon-roxo);
  letter-spacing: 1px;
}

#tamanho {
  width: 70px;
  padding: 8px;
  font-family: "Orbitron", monospace;
  font-size: 1.1rem;
  font-weight: bold;
  background: var(--cor-roxo-escuro);
  border: 2px solid var(--cor-laranja);
  border-radius: 5px;
  color: white;
  text-align: center;
  box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.5);
}

#tamanho:focus {
  outline: none;
  border-color: var(--cor-neon-laranja);
  box-shadow: 0 0 15px var(--cor-laranja);
}

#tabuleiro {
  display: grid;
  width: min-content;
  padding: 30px;
  background: rgba(26, 10, 46, 0.6);
  border-radius: 20px;
  border: 3px solid var(--cor-roxo);
  box-shadow: 0 0 40px rgba(107, 47, 181, 0.6),
    inset 0 0 30px rgba(0, 0, 0, 0.5);
  position: relative;
  z-index: 1;
  backdrop-filter: blur(10px);
}

.posicao {
  width: 120px;
  height: 120px;
  font-size: 70px;
  font-weight: 900;
  text-align: center;
  line-height: 120px;
  background: linear-gradient(
    135deg,
    rgba(74, 31, 127, 0.4),
    rgba(10, 0, 21, 0.6)
  );
  border: 5px solid var(--cor-roxo);
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.posicao::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: radial-gradient(circle, var(--cor-laranja) 0%, transparent 70%);
  opacity: 0;
  transform: translate(-50%, -50%);
  transition: all 0.4s ease;
  border-radius: 50%;
}

.posicao:hover::before {
  width: 200px;
  height: 200px;
  opacity: 0.2;
}

.posicao:hover {
  background: linear-gradient(
    135deg,
    rgba(255, 107, 53, 0.2),
    rgba(107, 47, 181, 0.4)
  );
  transform: scale(1.05);
  box-shadow: 0 0 20px var(--cor-laranja),
    inset 0 0 20px rgba(255, 107, 53, 0.3);
  border-color: var(--cor-laranja);
}

.posicao:active {
  transform: scale(0.95);
}

.posicao-cima {
  border-top: none;
}

.posicao-esquerda {
  border-left: none;
}

.posicao-direita {
  border-right: none;
}

.posicao-baixo {
  border-bottom: none;
}

.posicao:not(:empty) {
  animation: aparecer 0.3s ease;
  text-shadow: 0 0 20px currentColor;
}

@keyframes aparecer {
  0% {
    transform: scale(0) rotate(180deg);
    opacity: 0;
  }
  60% {
    transform: scale(1.2) rotate(-10deg);
  }
  100% {
    transform: scale(1) rotate(0);
    opacity: 1;
  }
}

/* Cores diferentes para X e O */
.posicao {
  color: var(--cor-laranja);
}

@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }

  .posicao {
    width: 80px;
    height: 80px;
    font-size: 50px;
    line-height: 80px;
  }

  .controls {
    flex-direction: column;
  }
}