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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.game-container {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 30px;
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    max-width: 800px;
    width: 100%;
}

.game-header {
    text-align: center;
    margin-bottom: 20px;
}

.game-header h1 {
    font-size: 2.5rem;
    color: #e74c3c;
    text-shadow: 0 0 20px rgba(231, 76, 60, 0.5);
}

.game-header .subtitle {
    color: #ecf0f1;
    font-size: 1rem;
    margin-top: 5px;
    letter-spacing: 3px;
}

.difficulty-selector {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.diff-btn {
    background: rgba(255, 255, 255, 0.1);
    color: #ecf0f1;
    border: 2px solid rgba(255, 255, 255, 0.2);
    padding: 10px 20px;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.diff-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

.diff-btn.active {
    background: linear-gradient(135deg, #e74c3c, #c0392b);
    border-color: #e74c3c;
}

.game-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 300px;
    margin: 0 auto 20px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 10px;
    padding: 10px 20px;
}

.info-box {
    display: flex;
    align-items: center;
    gap: 5px;
}

.info-icon {
    font-size: 1.2rem;
}

.info-value {
    font-size: 1.5rem;
    font-weight: bold;
    color: #e74c3c;
    font-family: 'Courier New', monospace;
}

.status-icon {
    font-size: 2rem;
    cursor: pointer;
}

.board-container {
    display: flex;
    justify-content: center;
    overflow-x: auto;
    padding: 10px;
}

.game-board {
    display: inline-grid;
    gap: 2px;
    background: rgba(0, 0, 0, 0.5);
    padding: 5px;
    border-radius: 5px;
}

.cell {
    width: 30px;
    height: 30px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1rem;
    font-weight: bold;
    background: linear-gradient(145deg, #4a5568, #2d3748);
    border: 1px solid #1a202c;
    cursor: pointer;
    user-select: none;
    transition: all 0.1s ease;
}

.cell:hover:not(.revealed) {
    background: linear-gradient(145deg, #5a6578, #3d4758);
}

.cell.revealed {
    background: #2d3748;
    cursor: default;
}

.cell.mine {
    background: #e74c3c;
}

.cell.flagged::before {
    content: '🚩';
}

.cell.question::before {
    content: '❓';
}

.cell[data-number="1"] { color: #3498db; }
.cell[data-number="2"] { color: #27ae60; }
.cell[data-number="3"] { color: #e74c3c; }
.cell[data-number="4"] { color: #9b59b6; }
.cell[data-number="5"] { color: #e67e22; }
.cell[data-number="6"] { color: #1abc9c; }
.cell[data-number="7"] { color: #34495e; }
.cell[data-number="8"] { color: #95a5a6; }

.controls {
    display: flex;
    justify-content: center;
    margin-top: 20px;
}

.control-btn {
    background: linear-gradient(135deg, #3498db, #2980b9);
    color: white;
    border: none;
    padding: 12px 30px;
    font-size: 1rem;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.control-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(52, 152, 219, 0.4);
}

.instructions {
    margin-top: 20px;
    text-align: center;
    color: #95a5a6;
}

.instructions h3 {
    color: #ecf0f1;
    margin-bottom: 10px;
}

.instructions p {
    font-size: 0.9rem;
    margin: 5px 0;
}

@media (max-width: 600px) {
    .game-container {
        padding: 15px;
    }

    .game-header h1 {
        font-size: 2rem;
    }

    .cell {
        width: 25px;
        height: 25px;
        font-size: 0.8rem;
    }

    .diff-btn {
        padding: 8px 15px;
        font-size: 0.8rem;
    }
}