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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #2b345a 0%, #c7bfcf 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    background: white;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    max-width: 800px;
    width: 100%;
}

h1 {
    text-align: center;
    color: #333;
    margin-bottom: 25px;
    font-size: 2.5em;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.form-section {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 20px;
}

.form-group {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.input-wrapper {
    flex: 1;
    min-width: 150px;
}

label {
    display: block;
    margin-bottom: 5px;
    color: #555;
    font-weight: 600;
    font-size: 0.9em;
}

input[type="number"] {
    width: 100%;
    padding: 10px;
    border: 2px solid #ddd;
    border-radius: 5px;
    font-size: 1em;
    transition: border-color 0.3s;
}

input[type="number"]:focus {
    outline: none;
    border-color: #667eea;
}

button {
    width: 100%;
    padding: 12px;
    background: linear-gradient(135deg, #667eea 0%, #cbc2d4 100%);
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 1.1em;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

button:active {
    transform: translateY(0);
}

.game-info {
    display: flex;
    justify-content: space-around;
    margin-bottom: 20px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 10px;
    display: none;
}

.info-item {
    text-align: center;
}

.info-label {
    font-size: 0.9em;
    color: #666;
    margin-bottom: 5px;
}

.info-value {
    font-size: 1.5em;
    font-weight: bold;
    color: #333;
}

#board {
    display: inline-grid;
    gap: 1px;
    background: #999;
    border: 3px solid #999;
    padding: 1px;
    margin: 0 auto;
}

.board-container {
    text-align: center;
    overflow-x: auto;
}

.cell {
    width: 30px;
    height: 30px;
    background: linear-gradient(135deg, #e0e0e0 0%, #c0c0c0 100%);
    border: 2px outset #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    font-weight: bold;
    font-size: 0.9em;
    user-select: none;
    transition: all 0.1s;
}

.cell:hover:not(.revealed):not(.flagged) {
    background: linear-gradient(135deg, #f0f0f0 0%, #d0d0d0 100%);
    border-color: #667eea;
}

.cell.revealed {
    background: #f5f5f5;
    border: 1px solid #ccc;
    cursor: default;
}

.cell.flagged {
    background: linear-gradient(135deg, #ffd700 0%, #ffb700 100%);
}

.cell.flagged::before {
    content: "🚩";
    font-size: 1.2em;
}

.cell.mine {
    background: #ff4444;
}

.cell.mine::before {
    content: "💣";
    font-size: 1.2em;
}

.cell[data-nearby="1"] { color: #0000ff; }
.cell[data-nearby="2"] { color: #008000; }
.cell[data-nearby="3"] { color: #ff0000; }
.cell[data-nearby="4"] { color: #000080; }
.cell[data-nearby="5"] { color: #800000; }
.cell[data-nearby="6"] { color: #008080; }
.cell[data-nearby="7"] { color: #000000; }
.cell[data-nearby="8"] { color: #808080; }

.message {
    text-align: center;
    padding: 15px;
    border-radius: 10px;
    margin-top: 20px;
    font-weight: bold;
    font-size: 1.2em;
    display: none;
}

.message.win {
    background: #d4edda;
    color: #155724;
    border: 2px solid #c3e6cb;
}

.message.lose {
    background: #f8d7da;
    color: #721c24;
    border: 2px solid #f5c6cb;
}