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

html, body {
  height: 100%;
  width: 100%;
}
body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #ece9e6, #ffffff);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  margin: 0;
}

h1 {
  margin-bottom: 20px;
  color: #333;
  font-size: 1.8rem;
  letter-spacing: 1px;
}

.board {
  display: grid;
  grid-template-columns: repeat(10, 30px);
  grid-gap: 4px;
  background: #ddd;
  padding: 10px;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.cell {
  width: 30px;
  height: 30px;
  background: #fff;
  border-radius: 4px;
  box-shadow: inset 0 0 5px rgba(0, 0, 0, 0.1);
  transition: background 0.2s, transform 0.2s;
  cursor: pointer;
}
.cell:hover {
  background: #e0e0e0;
  transform: scale(1.05);
}