body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f9;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.game-container {
    background: #ffffff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    text-align: center;
    width: 375px;
}

h1 {
    font-size: 24px;
    margin-bottom: 20px;
    color: #333;
}

.grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: 0px;
    margin-bottom: 20px;
}

.row {
    display: flex;
}

.cell {
    width: 40px;
    height: 40px;
    background-color: #e0e0e0;
    border: 1px solid #ccc;
    display: flex;
    justify-content: center;
    align-items: center;
}

.cell.found {
    background-color: #4caf50;
}

.cell.miss {
    background-color: #f44336;
}

.cell.header {
    background-color: #d3d3d3;
    font-weight: bold;
    text-align: center;
}

.controls {
    margin-bottom: 20px;
}

label {
    font-weight: bold;
    margin-right: 5px;
}

input {
    width: 50px;
    padding: 5px;
    margin-right: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
}

button {
    background-color: #007bff;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
}

button:hover {
    background-color: #0056b3;
}

.feedback {
    font-size: 14px;
    color: #333;
}

.echo-row {
  background: linear-gradient(to right, #ffeb3b, #ffc107);
  position: relative;
  overflow: hidden;
}

.echo-column {
  background: linear-gradient(to bottom, #ffeb3b, #ffc107);
  position: relative;
  overflow: hidden;
}