/* GENERAL RESET & GLOBAL SETTINGS */
:root {
  --color-bg: #111;
  --color-cell: #222;
  --color-border: #555;
  --color-x: crimson;
  --color-o: royalblue;
  --color-win: #4caf50;
  --color-text: white;
  --color-btn: #333;
  --color-selected: #e6c34a;
}

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

  user-select: none;       /* Evita seleccionar texto con el mouse */
  -webkit-user-select: none; /* Safari/Chrome */
  -ms-user-select: none;     /* IE/Edge */

  -webkit-tap-highlight-color: transparent; /* iOS/Android: elimina el flash azul (efecto tactil) */

}

body {
  height: 100vh; 
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;     
  background: var(--color-bg);
  color: var(--color-text);
  font-family: Arial, sans-serif;
}

h1 {
  font-size: 2rem;
  text-align: center;
}


/* TABLERO Y CELDAS */
.container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 5px;

  /* Para que se adapte a pantallas: */
  width: min(90vw, 400px);  /* El tablero será máx 400px o 90% del ancho */
  height: min(90vw, 400px); /* Ancho = Altura = Siempre cuadrado */
}

.cell {
  background: var(--color-cell);
  border: 2px solid var(--color-border);
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 3rem;
  font-weight: bold;
  cursor: pointer;
  transition: background 0.2s;
  aspect-ratio: 1 / 1; /* Forzamos Cuadrado*/
}


/* HOVER PREVIEW */
.cell.previewX {
  background-color: var(--color-x);
  opacity: 0.9;
}
.cell.previewO {
  background-color: var(--color-o);
  opacity: 0.9;
}

/* VISOR DE TURNOS + MODOS */
.modeRow {
  display: grid;
  grid-template-columns: 50px 1fr 50px;
  gap: 40px;
  align-items: center;
  justify-content: center;
  max-width: 350px;
  margin: 15px auto 20px auto;
}

/* Iconos */
.modeIcon {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%; 
  font-size: 1.4rem;
  cursor: pointer;
  user-select: none;
  transition: background 0.3s ease, transform 0.2s ease;
  border: 3px solid #000;
  background: #444;
  color: white;
  font-weight: bold;
  box-shadow: 0 4px 8px rgba(0,0,0,0.3);
}

.modeIcon:hover {
  background: #666;
}

.modeIcon.active {
  background: var(--color-selected);
}


/* Visor */
#turnBox {
  display: flex;
  justify-content: center;
  align-items: center;
  width: min(45vw, 220px);
  overflow: hidden;
  font-size: clamp(22px, 5vw, 28px);
  font-weight: bold;
  text-align: center;
  color: var(--color-text);
  box-shadow: 0 4px 8px rgba(0,0,0,0.3); 
  border: 3px solid #000; 
}

.turnSide:first-child {
  border-right: 3px solid #000;
}

.turnSide {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 5px 0; 
  background-color: #444;
  transition: background 0.3s ease;
}

/* Colores de turno */
.activeX {
  background-color: var(--color-x);
}

.activeO {
  background-color: var(--color-o);
}


/* CELDAS GANADORAS */
.winner {
  background-color: var(--color-win);
  color: #fff; 
  box-shadow: 0 0 15px rgba(59, 165, 93, 0.7);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}


/* MENSAJE GANADOR */
.winnerJ {
  margin-top: 20px;
  color: var(--color-text);
  font-size: clamp(10px, 5vw, 22px);
  font-weight: bold;
  text-align: center;
}

.hidden {
  display: none;
}


/* BOTÓN REINICIAR */
.restartBtn {
  margin: 18px auto;
  padding: 10px 20px;
  border: none;
  background: var(--color-btn);
  color: var(--color-text);
  font-weight: bold;
  font-size: clamp(10px, 5vw, 18px);
  border-radius: 10px;
  cursor: pointer;
  transition: background 0.3s ease;
  width: clamp(90px, 30vw, 130px);
  display: flex;
  justify-content: center; 
  align-items: center;     
}

.restartBtn:hover {
  background: var(--color-o);
}

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