/* ===== Diseño base ===== */
html {
  box-sizing: border-box;
  font-size: 16px;
}

*, *:before, *:after {
  box-sizing: inherit;
}

body {
  background: #f2f2f2;
  font-family: Arial, sans-serif;
  color: #222;
  text-align: center;
  margin: 0;
  min-height: 100vh;
}

/* ===== Encabezado ===== */
h1 {
  color: #d7263d;
  margin-top: 2rem;
  font-size: clamp(2rem, 4vw, 2.5rem);
}

/* ===== Tablero ===== */
#board {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 0.7vw;
  margin: 2.5rem auto 1.7rem auto;
  background: #1565c0;
  padding: 2vw;
  border-radius: 1rem;
  width: 100%;
  max-width: 98vw;
}

/* Una celda */
.cell {
  aspect-ratio: 1 / 1;
  width: 100%;
  background: #fff;
  border-radius: 0.7rem;
  box-shadow: 0 2px 8px #bbb;
  font-size: clamp(1rem, 2.5vw, 1.4rem);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s;
  user-select: none;
}
.cell.revealed { background: #bbdefb; cursor: default; }
.cell.mine    { background: #d7263d; color: #fff; }
.cell.flag    { background: #ffe082; color: #d7263d; }

/* ===== Estado y botón ===== */
#status {
  font-size: 1.1rem;
  min-height: 2em;
  margin: 0.5em 0 0.7em 0;
}
#restart-btn {
  background: #d7263d;
  color: #fff;
  font-size: clamp(1rem, 2vw, 1.3rem);
  border: none;
  border-radius: 0.7rem;
  padding: 0.5em 2em;
  cursor: pointer;
  transition: background 0.2s;
  margin-bottom: 1.2em;
  margin-top: 1em;
}
#restart-btn:hover { background: #920c22; }


/* ========================================
   =====   Pantallas pequeñas (<720px)  ====
   ======================================== */
@media (max-width: 720px) {
  h1 {
    margin-top: 3vw;
    font-size: clamp(1.3rem, 6vw, 2.1rem);
  }
  #board {
    /* Cambia columnas si el tablero lo permite */
    grid-template-columns: repeat(6, 1fr);
    padding: 4vw;
    border-radius: 4vw;
    gap: 2.8vw;
    margin-top: 4vw;
    margin-bottom: 6vw;
    max-width: 99vw;
  }
  .cell {
    font-size: clamp(1.2rem, 8vw, 2.5rem);
    border-radius: 3vw;
  }
  #restart-btn {
    font-size: clamp(1rem, 8vw, 2rem);
    padding: 3vw 12vw;
    border-radius: 3vw;
    margin-bottom: 6vw;
    margin-top: 3vw;
  }
  #status {
    font-size: clamp(1rem, 7vw, 1.7rem);
  }
}

/* ========================================
   =====   Pantallas muy pequeñas (<400px) ==
   ======================================== */
@media (max-width: 400px) {
  #board {
    grid-template-columns: repeat(4, 1fr);
    padding: 2vw;
    gap: 2vw;
    border-radius: 5vw;
  }
  .cell { font-size: clamp(1rem, 10vw, 2.2rem); }
  #restart-btn {
    padding: 3vw 4vw;
    font-size: clamp(0.9rem, 7vw, 1.5rem);
    border-radius: 5vw;
  }
}

/* ========================================
   =====   Pantallas grandes (>1200px)   ====
   ======================================== */
@media (min-width: 1200px) {
  #board {
    max-width: 700px;
    padding: 2rem;
    gap: 0.7rem;
  }
  h1 {
    font-size: clamp(2.5rem, 3vw, 3.5rem);
  }
  .cell {
    font-size: clamp(1.3rem, 2vw, 2rem);
  }
}

/* :::::::::::::::::::::::::::::: */
/* Controles (tamaño/minas) y contador de banderas */
#controls {
  margin: 0.8rem auto 0.4rem auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
#controls select {
  font-size: 1em;
  padding: 6px 10px;
  border-radius: 8px;
  border: 1px solid #ddd;
}
#counters {
  font-size: 1rem;
  color: #333;
  margin-bottom: 0.4rem;
}

/* Accesibilidad: foco visible en celdas */
.cell {
  border: none;
  outline: none;
}
.cell:focus-visible {
  box-shadow: 0 0 0 4px rgba(215, 38, 61, 0.35);
}

/* Estado deshabilitado para botón reinicio */
#restart-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  box-shadow: none;
}

/* Modo oscuro mejorado */
@media (prefers-color-scheme: dark) {
  body {
    background: #0f1222;
    color: #eaeaf0;
  }
  #board {
    background: #182a46;
    box-shadow: 0 6px 24px rgba(61, 90, 254, 0.12);
    border: 1px solid rgba(255,255,255,0.06);
  }
  .cell {
    background: #20233a;
    color: #eaeaf0;
    box-shadow: 0 2px 10px rgba(61, 90, 254, 0.12);
  }
  .cell.revealed { background: #264b74; }
  .cell.mine { background: #7c1f2a; color: #fff; }
  .cell.flag { background: #8a6d28; color: #ffd54f; }
  #status, #counters {
    color: #a0a3b0;
  }
  #restart-btn {
    background: #3d5afe;
  }
  #restart-btn:hover {
    background: #0a2459;
  }
  #controls select {
    background: #20233a;
    color: #eaeaf0;
    border-color: #2c3252;
  }
  .cell:focus-visible {
    box-shadow: 0 0 0 4px rgba(61, 90, 254, 0.35);
  }
}