/* ===== BASE (MOBILE FIRST) ===== */
body {
  font-family: Georgia, 'Times New Roman', Times, serif;
  color: antiquewhite;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  margin: 0;
  padding: 1rem;
  background-color: rgb(26, 26, 26);
}

h1 {
  color: antiquewhite;
  font-size: 1.8rem;
  margin-bottom: 1rem;
  text-align: center;
}

.game-container {
  width: 100%;
  max-width: 300px;
  background-color: rgb(44, 44, 44);
  padding: 1.5rem;
  border-radius: 10px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.game-status {
  margin: 1rem 0;
  font-size: 1.2rem;
  font-weight: bold;
  min-height: 1.5rem;
  text-align: center;
  color: antiquewhite;
  padding: 0.5rem;
  background-color: rgb(48, 48, 48);
  border-radius: 5px;
}


/* ===== TABULEIRO ===== */
.board {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  gap: 8px;
  background-color: rgb(26, 26, 26);
  border-radius: 8px;
  padding: 8px;
  position: relative;
  overflow: hidden;
  width: 300px; /* Largura fixa */
  height: 300px; /* Altura fixa */
  margin: 0 auto; /* Centraliza o tabuleiro */
}

.cell {
  background-color: rgb(48, 48, 48);
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 3rem;
  cursor: pointer;
  border-radius: 5px;
  transition: background-color 0.3s ease;
  position: relative;
  user-select: none;
  width: 100%; /* Ocupa toda a largura da célula do grid */
  height: 100%; /* Ocupa toda a altura da célula do grid */
  min-height: 0; /* Impede expansão */
  min-width: 0; /* Impede expansão */
}

.cell.x {
  color: #3498db; /* Azul para X */
}

.cell.o {
  color: #e74c3c; /* Vermelho para O */
  text-shadow: 0 0 5px rgba(231, 76, 60, 0.5);
}

.cell:hover {
  background-color: rgb(60, 60, 60);
}

.cell:focus {
  outline: 3px solid #3498db;
  outline-offset: -3px;
}

.cell.winner {
  background-color: rgba(46, 204, 113, 0.2);
}

.cell.cpu-move {
    background-color: rgba(231, 76, 60, 0.2);
    transition: background-color 0.5s;
}

.controls {
  margin-top: 1.5rem;
  display: flex;
  justify-content: center;
}

button {
  padding: 0.5rem 1rem;
  font-size: 1rem;
  cursor: pointer;
  background-color: #3498db;
  color: white;
  border: none;
  border-radius: 5px;
  transition: all 0.3s ease;
  font-weight: bold;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

button:hover {
  background-color: #2980b9;
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

button:active {
  transform: translateY(0);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ===== ANIMAÇÃO DA LINHA VENCEDORA ===== */
.winning-line {
  position: absolute;
  background-color: #2ecc71;
  z-index: 10;
  animation: drawLine 0.5s ease-out forwards;
  box-shadow: 0 0 5px rgba(46, 204, 113, 0.7);
}

@keyframes drawLine-horizontal {
  from {
    transform: scaleX(0);
  }
  to {
    transform: scaleX(1);
  }
}

@keyframes drawLine-vertical {
  from {
    transform: scaleY(0);
  }
  to {
    transform: scaleY(1);
  }
}


/* Posições da linha vencedora  */
.winning-line.row-0 {
  height: 6px;
  width: calc(100% - 16px);
  left: 8px;
  top: calc(16.66% + 4px);
  transform-origin: left center;
}

.winning-line.row-1 {
  height: 6px;
  width: calc(100% - 16px);
  left: 8px;
  top: 50%;
  transform-origin: left center;
}

.winning-line.row-2 {
  height: 6px;
  width: calc(100% - 16px);
  left: 8px;
  top: calc(83.33% - 4px);
  transform-origin: left center;
}

.winning-line.col-0 {
  width: 6px;
  height: calc(100% - 16px);
  left: calc(16.66% + 4px);
  top: 8px;
  transform-origin: center top;
}

.winning-line.col-1 {
  width: 6px;
  height: calc(100% - 16px);
  left: 50%;
  top: 8px;
  transform-origin: center top;
}

.winning-line.col-2 {
  width: 6px;
  height: calc(100% - 16px);
  left: calc(83.33% - 4px);
  top: 8px;
  transform-origin: center top;
}

.winning-line.diagonal-1 {
  width: 150%;
  height: 8px;
  top: 0;
  left: 0;
  transform: rotate(-45deg) scaleX(0);
  transform-origin: left center;
  animation: drawDiagonal 0.5s ease-out forwards;
}

.winning-line.diagonal-2 {
  width: 150%;
  height: 8px;
  top: 100%;
  left: 0;
  transform: rotate(45deg) scaleX(0);
  transform-origin: left center;
  animation: drawDiagonal 0.5s ease-out forwards;
}


/* Animação de empate */
.draw-v {
  position: absolute;
  width: 100%;
  height: 100%;
  left: 0;
  top: 0;
  z-index: 10;
  pointer-events: none;
}

.draw-v-line {
  position: absolute;
  width: 140%;
  height: 8px;
  background-color: #f39c12;
  top: 50%;
  left: -20%;
  animation: drawV 0.5s ease-out forwards;
  transform-origin: center;
}

.draw-v-line.first {
  transform: rotate(45deg);
}

.draw-v-line.second {
  transform: rotate(-45deg);
}

@keyframes drawV {
  from {
    transform: rotate(var(--angle)) scaleX(0);
  }
  to {
    transform: rotate(var(--angle)) scaleX(1);
  }
}

@keyframes drawDiagonal {
  from {
    transform: rotate(var(--angle)) scaleX(0);
  }
  to {
    transform: rotate(var(--angle)) scaleX(1);
  }
}

/* ===== RANKING ===== */
.ranking-container {
    margin-top: 1.5rem;
    background-color: rgb(48, 48, 48);
    padding: 1rem;
    border-radius: 10px;
}

.current-player {
    text-align: center;
    margin-bottom: 1rem;
}

.current-player h3 {
    color: #2ecc71;
    margin: 0;
    font-size: 2rem;
    letter-spacing: 2px;
}

.points {
    font-size: 1.1rem;
    margin-top: 0.3rem;
}

.leaderboard {
    margin-top: 1rem;
}

.leaderboard h4 {
    text-align: center;
    margin-bottom: 0.5rem;
    color: #f39c12;
}

#leaderboard-table {
    width: 100%;
    border-collapse: collapse;
}

#leaderboard-table th, 
#leaderboard-table td {
    padding: 0.5rem;
    text-align: center;
    border-bottom: 1px solid rgb(70, 70, 70);
}

#leaderboard-table th {
    background-color: rgb(40, 40, 40);
    color: #3498db;
}

#leaderboard-table tr:nth-child(even) {
    background-color: rgb(44, 44, 44);
}

/* ===== MEDIA QUERIES PARA TELAS MAIORES ===== */
@media (min-width: 768px) {
  .game-container {
    max-width: 400px;
    padding: 2rem;
  }
  
  h1 {
    font-size: 2.2rem;
    margin-bottom: 1.5rem;
  }
  
  .game-status {
    font-size: 1.3rem;
    padding: 0.7rem;
  }

  .board {
    width: 400px;
    height: 400px;
  }
  
  .cell {
    font-size: 4rem;
  }
  
  button {
    padding: 0.8rem 1.8rem;
    font-size: 1.1rem;
  }
  
  .winning-line {
    height: 8px;
  }
  
  .winning-line.col-0,
  .winning-line.col-1,
  .winning-line.col-2 {
    width: 8px;
  }
}

@media (min-width: 1024px) {
  .game-container {
    max-width: 500px;
  }
  
  .board {
    width: 500px;
    height: 500px;
  }

  .cell {
    font-size: 5rem;
  }
}