body {
            margin: 0;
            overflow: hidden;
            background-color: #1a1a1a;
            color: white;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            touch-action: none;
        }

        #canvas-container {
            width: 100vw;
            height: 100vh;
        }

        /* Scrollbar for history */
        ::-webkit-scrollbar {
            width: 8px;
        }

        ::-webkit-scrollbar-track {
            background: #333;
        }

        ::-webkit-scrollbar-thumb {
            background: #666;
            border-radius: 4px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: #888;
        }

        /* History Layout */
        #history-log {
            display: flex;
            flex-wrap: wrap;
            align-content: flex-start;
            gap: 6px;
        }

        .move-card {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: #333;
            padding: 6px 10px;
            border-radius: 6px;
            font-family: monospace;
            font-weight: bold;
            font-size: 1rem;
            min-width: 32px;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
        }

        /* Smooth collapse transition */
        .panel-content {
            transition: max-height 0.3s ease-in-out, opacity 0.3s ease-in-out;
            max-height: 500px;
            /* Arbitrary large value */
            opacity: 1;
            overflow: hidden;
        }

        /* Logic for expanding UPWARDS */
        .panel-container {
            display: flex;
            flex-direction: column-reverse;
            /* Header at bottom */
            align-items: flex-start;
        }

        .panel-container.right-aligned {
            align-items: flex-end;
        }

        .panel-content.collapsed {
            max-height: 0;
            opacity: 0;
            padding: 0;
            margin: 0;
            border-width: 0;
        }

        .chevron {
            transition: transform 0.3s;
        }

        .collapsed .chevron {
            transform: rotate(180deg);
            /* Flip for upward expansion logic */
        }

        /* Leaderboard Row Hover */
        .leaderboard-row:hover {
            background-color: rgba(255, 255, 255, 0.1);
            cursor: pointer;
        }

        /* Puzzle Tab Styles */
        .puzzle-tab {
            background-color: rgba(75, 85, 99, 0.3);
            color: rgb(156, 163, 175);
            transition: all 0.2s;
        }

        .puzzle-tab:hover {
            background-color: rgba(75, 85, 99, 0.5);
            color: rgb(209, 213, 219);
        }

        .puzzle-tab.active {
            background-color: rgb(59, 130, 246);
            color: white;
            font-weight: bold;
        }

        /* Carousel Styles */
        .scrollbar-hide::-webkit-scrollbar {
            display: none;
        }

        .scrollbar-hide {
            -ms-overflow-style: none;
            scrollbar-width: none;
        }

        .snap-x {
            scroll-snap-type: x mandatory;
        }

        .snap-center {
            scroll-snap-align: center;
        }