body {
            font-family: 'Inter', sans-serif;
            touch-action: manipulation; /* Prevents double-tap zoom on mobile */
        }
        .card {
            background-color: white;
            border-radius: 1.5rem;
            padding: 2.5rem;
            box-shadow: 0 25px 50px -12px rgb(0 0 0 / 0.25);
        }
        .btn {
            transition: all 0.2s ease-in-out;
        }
        .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
        }
        .pattern-highlight {
            color: #7209B7; /* Palette Purple */
            font-weight: 700;
        }
        /* Word Find Styles */
        #word-find-grid {
            display: grid;
            grid-template-columns: repeat(10, 1fr);
            gap: 4px;
            user-select: none;
            -webkit-user-select: none; 
            -moz-user-select: none;
            -ms-user-select: none;
            max-width: 100vw;
            max-height: 60vw;
            width: 100%;
            height: auto;
            overflow: auto;
            touch-action: none; /* Prevent grid from scrolling/panning */
            margin: 0 auto;
            box-sizing: border-box;
        }
        .grid-cell {
            aspect-ratio: 1 / 1;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            font-weight: 500;
            border: 1px solid #d1d5db;
            border-radius: 0.25rem;
            cursor: pointer;
            transition: background-color 0.1s;
            touch-action: manipulation; /* Allow selection/highlight only */
        }
        .grid-cell.selecting {
            background-color: #4CC9F0; /* Palette Light Blue */
            color: white;
        }
        .grid-cell.found {
            background-color: #F72585; /* Palette Pink */
            color: white;
        }
        #found-words-list li.found {
            text-decoration: line-through;
            color: #6b7280; /* gray-500 */
        }
        .challenge-choice-btn {
            background-color: #f3f4f6;
            border: 2px solid #d1d5db;
        }
        .challenge-choice-btn:hover {
             background-color: #e5e7eb;
             border-color: #9ca3af;
        }