body {
  background: #bdbdbd;
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 0;
  padding: 20px;
  font-family: sans-serif;
}


#difficulty-bar {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-bottom: 15px;
}

#difficulty-bar button {
  background: #c0c0c0;
  border-top: 3px solid #ffffff;
  border-left: 3px solid #ffffff;
  border-bottom: 3px solid #7d7d7d;
  border-right: 3px solid #7d7d7d;
  cursor: pointer;
  padding: 3px;
}

#difficulty-bar button:active {
  border-top: 3px solid #7d7d7d;
  border-left: 3px solid #7d7d7d;
  border-bottom: 3px solid #ffffff;
  border-right: 3px solid #ffffff;
}


#top-bar {
  width: fit-content;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #c0c0c0;
  padding: 8px 12px;
  margin: 10px auto;
  border-top: 3px solid #ffffff;
  border-left: 3px solid #ffffff;
  border-bottom: 3px solid #7d7d7d;
  border-right: 3px solid #7d7d7d;
  gap: 20px;
}


.led {
  width: 60px;
  height: 40px;
  background: black;
  color: red;
  font-family: monospace;
  font-size: 32px;
  text-align: center;
  line-height: 40px;
  border: 2px solid #333;
  border-radius: 3px;
}


#reset-btn {
  border: none;
  background: #c0c0c0;
  padding: 0;
  cursor: pointer;
  border-top: 3px solid #ffffff;
  border-left: 3px solid #ffffff;
  border-bottom: 3px solid #7d7d7d;
  border-right: 3px solid #7d7d7d;
}

#reset-btn:active {
  border-top: 3px solid #7d7d7d;
  border-left: 3px solid #7d7d7d;
  border-bottom: 3px solid #ffffff;
  border-right: 3px solid #ffffff;
}

#face-img {
  width: 40px;
  height: 40px;
}


#board {
  display: grid;
  border: 3px solid #808080;
  background: #c0c0c0;
  margin-top: 10px;
}


.tile {
  width: 32px;
  height: 32px;
  background: #c0c0c0;
  border-top: 3px solid #ffffff;
  border-left: 3px solid #ffffff;
  border-bottom: 3px solid #7d7d7d;
  border-right: 3px solid #7d7d7d;
  box-sizing: border-box;
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
  font-weight: bold;
  font-size: 20px;
}

.tile.revealed {
  background: #d0d0d0;
  border: 2px solid #7d7d7d;
  border-top-color: #b0b0b0;
  border-left-color: #b0b0b0;
}


.tile.flag {
  background-image: url("images/flag.png");
  background-size: 28px 28px;
  background-position: center;
  background-repeat: no-repeat;
}

.tile.bomb {
  background-image: url("images/bomb.png");
  background-size: 28px 28px;
  background-position: center;
  background-repeat: no-repeat;
}

.tile.exploded {
  background-color: red !important;
  background-image: url("images/wrong-bomb.png") !important;
  background-size: 28px 28px;
  background-position: center;
  background-repeat: no-repeat;
}

.tile.question {
  background-image: url("images/questionmark.png");
  background-size: 28px 28px;
  background-position: center;
  background-repeat: no-repeat;
}


.n1 { color: blue; }
.n2 { color: green; }
.n3 { color: red; }
.n4 { color: navy; }
.n5 { color: brown; }
.n6 { color: teal; }
.n7 { color: black; }
.n8 { color: gray; }

#page-container {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  width: 100%;
  gap: 20px;
}


#game-area {
  display: flex;
  flex-direction: column;
  align-items: center;
}


#left-ad,
#right-ad {
  width: 160px; 
  min-height: 600px;
  background: #e0e0e0;
  border: 2px solid #999;
}


#bottom-ad {
  width: 100%;
  height: 120px;
  margin-top: 20px;
  background: #e0e0e0;
  border: 2px solid #999;
}
#guide-text {
  max-width: 500px;
  margin: 20px auto;
  padding: 15px;
  background: #e6e6e6;
  border: 2px solid #999;
  border-radius: 5px;
  text-align: center;
  font-size: 16px;
  line-height: 1.5;
}

#guide-text h2 {
  margin-top: 0;
  font-size: 20px;
}