body {
            font-family: Arial, sans-serif;
            background: linear-gradient(135deg, #1e3c72, #2a5298);
            color: white;
            margin: 0;
            padding: 20px;
            min-height: 100vh;
        }
        
        .container {
            max-width: 1400px;
            margin: 0 auto;
            text-align: center;
        }
        
        h1 {
            color: #ffd700;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
            margin-bottom: 30px;
        }
        
        .config-panel {
            background: rgba(255,255,255,0.1);
            padding: 20px;
            border-radius: 15px;
            margin-bottom: 30px;
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255,255,255,0.2);
        }
        
        .config-section {
            display: inline-block;
            margin: 10px 20px;
            vertical-align: top;
        }
        
        .config-title {
            color: #ffd700;
            font-size: 18px;
            margin-bottom: 10px;
        }
        
        .grid-config {
            display: flex;
            gap: 20px;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
        }
        
        .input-group {
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        
        .input-group label {
            margin-bottom: 5px;
            color: #ffd700;
        }
        
        .input-group input, .input-group select {
            padding: 8px;
            border: none;
            border-radius: 5px;
            background: rgba(255,255,255,0.9);
            color: #333;
            font-size: 14px;
        }
        
        .ships-config {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 15px;
            margin-bottom: 20px;
        }
        
        .ship-config {
            background: rgba(255,255,255,0.1);
            padding: 15px;
            border-radius: 10px;
            border: 1px solid rgba(255,255,255,0.2);
            min-width: 200px;
        }
        
        .ship-config h4 {
            margin: 0 0 10px 0;
            color: #ffd700;
        }
        
        .ship-controls {
            display: flex;
            gap: 10px;
            align-items: center;
        }
        
        .color-picker {
            width: 40px;
            height: 30px;
            border: none;
            border-radius: 5px;
            cursor: pointer;
        }
        
        .boards-container {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 30px;
            margin-bottom: 30px;
        }
        
        .board-section {
            background: rgba(255,255,255,0.1);
            padding: 20px;
            border-radius: 15px;
            box-shadow: 0 8px 32px rgba(0,0,0,0.3);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255,255,255,0.2);
        }
        
        .board-title {
            color: #ffd700;
            margin-bottom: 15px;
            font-size: 18px;
            font-weight: bold;
        }
        
        .board {
            display: inline-grid;
            gap: 1px;
            background: #333;
            padding: 5px;
            border-radius: 8px;
            margin-bottom: 15px;
        }
        
        .cell {
            background: #87ceeb;
            border: 1px solid #4682b4;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            font-weight: bold;
            position: relative;
            cursor: pointer;
        }
        
        .ship {
            color: white;
            box-shadow: inset 0 0 10px rgba(0,0,0,0.3);
        }
        
        .coordinates {
            font-size: 8px;
            color: #666;
            position: absolute;
            top: 1px;
            left: 1px;
        }
        
        .legend {
            text-align: left;
            margin-top: 10px;
            font-size: 14px;
        }
        
        .legend-item {
            display: inline-block;
            margin: 5px 10px;
        }
        
        .legend-color {
            display: inline-block;
            width: 20px;
            height: 20px;
            margin-right: 5px;
            vertical-align: middle;
            border: 1px solid #333;
        }
        
        .button-container {
            margin: 20px 0;
        }
        
        .btn {
            background: linear-gradient(45deg, #ff6b6b, #ff8e8e);
            color: white;
            border: none;
            padding: 12px 24px;
            border-radius: 25px;
            font-size: 16px;
            cursor: pointer;
            margin: 5px;
            transition: all 0.3s;
            box-shadow: 0 4px 15px rgba(255,107,107,0.3);
        }
        
        .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(255,107,107,0.4);
        }
        
        .btn-secondary {
            background: linear-gradient(45deg, #4ecdc4, #6ed3cd);
            box-shadow: 0 4px 15px rgba(78,205,196,0.3);
        }
        
        .btn-secondary:hover {
            box-shadow: 0 6px 20px rgba(78,205,196,0.4);
        }
        
        .btn-success {
            background: linear-gradient(45deg, #51cf66, #69db7c);
            box-shadow: 0 4px 15px rgba(81,207,102,0.3);
        }
        
        .btn-success:hover {
            box-shadow: 0 6px 20px rgba(81,207,102,0.4);
        }
        
        .tips {
            background: rgba(255,255,255,0.1);
            padding: 20px;
            border-radius: 15px;
            margin-top: 20px;
            text-align: left;
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255,255,255,0.2);
        }
        
        .tip-title {
            color: #ffd700;
            font-size: 20px;
            margin-bottom: 15px;
            text-align: center;
        }
        
        .tip-item {
            margin: 10px 0;
            padding: 10px;
            background: rgba(255,255,255,0.05);
            border-radius: 8px;
            border-left: 4px solid #ffd700;
        }
        
        .stats {
            background: rgba(255,255,255,0.1);
            padding: 15px;
            border-radius: 10px;
            margin-top: 15px;
            text-align: center;
        }
        
        .stats h4 {
            color: #ffd700;
            margin: 0 0 10px 0;
        }
        
        .add-ship-btn {
            background: linear-gradient(45deg, #51cf66, #69db7c);
            color: white;
            border: none;
            padding: 8px 16px;
            border-radius: 20px;
            font-size: 14px;
            cursor: pointer;
            margin: 5px;
        }
        
        .remove-ship-btn {
            background: linear-gradient(45deg, #ff6b6b, #ff8e8e);
            color: white;
            border: none;
            padding: 4px 8px;
            border-radius: 15px;
            font-size: 12px;
            cursor: pointer;
            margin-left: 10px;
        }