:root {
  --bg-color: #f0f2f5;
  --board-bg: #bdbdbd;
  --cell-bg: #c0c0c0;
  --cell-border-light: #fff;
  --cell-border-dark: #7b7b7b;
  --primary-color: #4a90e2;
  --text-color: #333;
  --shadow: 0 4px 6px rgba(0,0,0,0.1);
  --font-family: 'Roboto', sans-serif;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-color);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  margin: 0;
  color: var(--text-color);
}

.game-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

header h1 {
  margin: 0;
  font-size: 2.5rem;
  color: var(--text-color);
  text-shadow: 1px 1px 2px rgba(0,0,0,0.1);
}

.game-board-wrapper {
  background-color: var(--board-bg);
  padding: 15px;
  border-radius: 4px;
  box-shadow: 
    inset 3px 3px 0px var(--cell-border-light),
    inset -3px -3px 0px var(--cell-border-dark),
    var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.status-bar {
  background-color: #c0c0c0;
  border: 3px solid;
  border-color: var(--cell-border-dark) var(--cell-border-light) var(--cell-border-light) var(--cell-border-dark);
  padding: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.counter {
  background-color: #000;
  color: #ff0000;
  font-family: 'Courier New', Courier, monospace;
  font-size: 1.5rem;
  padding: 2px 5px;
  border: 1px solid #7b7b7b;
  width: 60px;
  text-align: right;
  letter-spacing: 2px;
}

#reset-btn {
  font-size: 1.5rem;
  width: 40px;
  height: 40px;
  border: 3px solid;
  border-color: var(--cell-border-light) var(--cell-border-dark) var(--cell-border-dark) var(--cell-border-light);
  background-color: var(--cell-bg);
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 0;
}

#reset-btn:active {
  border-color: var(--cell-border-dark) var(--cell-border-light) var(--cell-border-light) var(--cell-border-dark);
  transform: translateY(1px);
}

.grid {
  display: grid;
  grid-template-columns: repeat(10, 30px);
  grid-template-rows: repeat(10, 30px);
  gap: 0;
  border: 4px solid;
  border-color: var(--cell-border-dark) var(--cell-border-light) var(--cell-border-light) var(--cell-border-dark);
}

.cell {
  width: 30px;
  height: 30px;
  background-color: var(--cell-bg);
  border: 3px solid;
  border-color: var(--cell-border-light) var(--cell-border-dark) var(--cell-border-dark) var(--cell-border-light);
  box-sizing: border-box;
  display: flex;
  justify-content: center;
  align-items: center;
  font-weight: bold;
  font-size: 1.2rem;
  cursor: pointer;
  user-select: none;
}

.cell.revealed {
  border: 1px solid #7b7b7b;
  background-color: #dcdcdc;
}

.cell.flagged {
  color: red;
}

.cell.mine {
  background-color: red;
  border: 1px solid #7b7b7b;
}

/* Number Colors */
.cell[data-value="1"] { color: blue; }
.cell[data-value="2"] { color: green; }
.cell[data-value="3"] { color: red; }
.cell[data-value="4"] { color: darkblue; }
.cell[data-value="5"] { color: brown; }
.cell[data-value="6"] { color: teal; }
.cell[data-value="7"] { color: black; }
.cell[data-value="8"] { color: gray; }

/* Responsive adjustments */
@media (max-width: 400px) {
  .grid {
    grid-template-columns: repeat(10, 28px);
    grid-template-rows: repeat(10, 28px);
  }
  .cell {
    width: 28px;
    height: 28px;
  }
}