:root {
            --paper-bg: #f4f1eb;
            --grid-line: #d1cbc1;
            --ink-dark: #2c3e50;
            --neon-blue: #0077ff;
            --neon-pink: #ff00ea;
            --neon-red: #ff3333;
            --cell-hover: #ffffff;
            --board-dark-cell: #1e2b38;
            --mem-front-bg: #e2dfd8;
            --mem-hatch: rgba(44, 62, 80, 0.1);
            --c4-board-bg: #aeb6bf;
            --c4-cell-bg: #d9dee3;
            --p1-miss-bg: rgba(0, 60, 180, 0.4);
            --p1-miss-shadow: rgba(0, 60, 180, 0.6);
            --p2-miss-bg: rgba(180, 0, 140, 0.4);
            --p2-miss-shadow: rgba(180, 0, 140, 0.6);
            --ship-color-p1: var(--neon-blue);
            --ship-color-p2: var(--neon-pink);
        }

        [data-theme="dark"] {
            --paper-bg: #12161a;
            --grid-line: #232d36;
            --ink-dark: #e0e6ed;
            --cell-hover: #2c3e50;
            --board-dark-cell: #1e2b38;
            --mem-front-bg: #1a252f;
            --mem-hatch: rgba(255, 255, 255, 0.05);
            --c4-board-bg: #212d38;
            --c4-cell-bg: #3c4b5c;
            --p1-miss-bg: rgba(100, 180, 255, 0.4);
            --p1-miss-shadow: rgba(100, 180, 255, 0.6);
            --p2-miss-bg: rgba(255, 130, 230, 0.4);
            --p2-miss-shadow: rgba(255, 130, 230, 0.6);
            --ship-color-p1: #80c4ff;
            --ship-color-p2: #ff80f4;
        }

        /* Enforce dark overlay background dynamically when resetting */
        [data-theme="dark"] .overlay:not([style]),
        [data-theme="dark"] .overlay[style*="244"] { 
            background-color: rgba(18, 22, 26, 0.95) !important; 
        }
        
        /* Dark mode overrides for JS inline end-game overlay colors */
        [data-theme="dark"] .overlay[style*="180, 255, 180"] { background-color: rgba(60, 120, 60, 0.95) !important; }
        [data-theme="dark"] .overlay[style*="255, 180, 180"] { background-color: rgba(120, 60, 60, 0.95) !important; }
        [data-theme="dark"] .overlay[style*="255, 235, 150"] { background-color: rgba(120, 105, 50, 0.95) !important; }

        /* Smooth Theme Transition for all dynamic color elements */
        body, .game-card, .overlay, button, .board, [class$="-board"], .cell, [class$="-cell"], .memory-card-front, .memory-card-back, .mm-front, .mm-back, .theme-toggle, .mini-box, .mini-dot, .mini-line {
            transition: background-color 0.4s ease, border-color 0.4s ease, color 0.4s ease, box-shadow 0.4s ease;
        }

        /* Theme Toggle Button Styles */
        .theme-toggle {
            position: absolute; top: 15px; right: 15px; width: 45px; height: 45px;
            background: var(--paper-bg); border: 2px solid var(--ink-dark); border-radius: 8px;
            cursor: pointer; z-index: 1000; display: flex; align-items: center; justify-content: center;
            box-shadow: 4px 4px 0px rgba(0,0,0,0.1); overflow: hidden;
        }
        .theme-toggle:hover { transform: translate(-2px, -2px); box-shadow: 6px 6px 0px rgba(0,0,0,0.15); }
        .theme-toggle:active { transform: translate(2px, 2px); box-shadow: 0px 0px 0px rgba(0,0,0,0.1); }
        .theme-toggle svg {
            position: absolute; width: 22px; height: 22px; stroke: var(--ink-dark); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; fill: none;
            transition: transform 0.5s cubic-bezier(0.68, -0.55, 0.26, 1.55), opacity 0.5s;
        }
        .theme-toggle .sun-icon { transform: translateY(40px) rotate(90deg); opacity: 0; }
        .theme-toggle .moon-icon { transform: translateY(0) rotate(0); opacity: 1; }
        
        [data-theme="dark"] .theme-toggle .sun-icon { transform: translateY(0) rotate(0); opacity: 1; }
        [data-theme="dark"] .theme-toggle .moon-icon { transform: translateY(-40px) rotate(-90deg); opacity: 0; }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            font-family: 'Courier New', Courier, monospace; 
            user-select: none;
        }

        body {
            background-color: var(--paper-bg);
            background-image: 
                linear-gradient(var(--grid-line) 1px, transparent 1px),
                linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
            background-size: 20px 20px;
            color: var(--ink-dark);
            display: block; /* Removed flex center to prevent mobile top cutoff */
            height: 100vh;
            height: 100dvh; /* Responsive to mobile address bar */
            width: 100vw;
            margin: 0;
            padding: 0;
            overflow: hidden;
        }

        /* --- GAME TITLES --- */
        .xo-card, #screen-xo { --stroke-color: #0044aa; }
        .dots-card, #screen-dots { --stroke-color: #aa0099; }
        .cascade-card, #screen-cascade { --stroke-color: #008040; }
        .sudoku-card, #screen-sudoku { --stroke-color: #b36e00; }
        .reversi-card, #screen-reversi { --stroke-color: #59008c; }
        .checkers-card, #screen-checkers { --stroke-color: #b3003b; }
        .chess-card, #screen-chess { --stroke-color: #008022; }
        .c4-card, #screen-c4 { --stroke-color: #b34a00; }
        .battle-card, #screen-battle { --stroke-color: #009966; }
        .memory-card-menu, #screen-memory { --stroke-color: #b3a429; }

        .game-title-header {
            font-size: 2.2rem;
            text-align: center;
            margin-top: 55px; /* Pushes title down to clear the absolute back button */
            margin-bottom: 15px;
            letter-spacing: 3px;
            font-weight: bold;
            -webkit-text-stroke: 1px var(--stroke-color, var(--ink-dark));
        }

        /* --- SCREEN MANAGEMENT --- */
        .screen {
            display: none;
            position: relative;
            width: 100%;
            height: 100%;
            flex-direction: column;
            align-items: center;
            justify-content: center; /* Centers game screens vertically */
            animation: fadeIn 0.4s ease forwards;
        }
        .screen.active {
            display: flex;
        }
        #screen-menu.active {
            justify-content: flex-start; /* Overrides center for scrollable menu */
            overflow-y: auto;
            padding: 75px 0 60px 0; /* Top padding clears the absolute toggle button */
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(15px); }
            to { opacity: 1; transform: translateY(0); }
        }

        /* --- MENU STYLES --- */
        .menu-header {
            text-align: center;
            margin-bottom: 40px;
            padding: 0 20px;
        }
        .menu-header h1 {
            font-size: 3rem;
            color: var(--ink-dark);
            letter-spacing: 4px;
            margin-bottom: 10px;
            text-shadow: 2px 2px 0px rgba(0,0,0,0.1);
        }
        .menu-header p {
            font-size: 1.1rem;
            font-weight: bold;
            max-width: 400px;
            margin: 0 auto;
        }
        .game-cards {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 25px;
            width: 90vw;
            max-width: 700px;
            justify-content: center;
        }
        .game-card {
            background: var(--paper-bg);
            border: 4px solid var(--ink-dark);
            border-radius: 8px;
            padding: 20px;
            text-align: center;
            cursor: pointer;
            box-shadow: 8px 8px 0px rgba(0,0,0,0.1);
            transition: transform 0.2s, box-shadow 0.2s;
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        .game-card:hover {
            transform: translate(-4px, -4px);
            box-shadow: 12px 12px 0px rgba(0,0,0,0.15);
        }
        
        /* --- MINI ANIMATION PREVIEWS --- */
        .card-preview {
            width: 140px;
            height: 140px;
            margin-bottom: 20px;
            background-color: var(--ink-dark);
            border-radius: 8px;
            padding: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: inset 0 0 10px rgba(0,0,0,0.5);
        }
        
        /* XO Mini Animation */
        .mini-xo-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            grid-template-rows: repeat(3, 1fr);
            width: 100%; height: 100%; gap: 2px;
            position: relative;
        }
        .mini-xo-cell {
            background: var(--paper-bg);
            display: flex; align-items: center; justify-content: center;
        }
        .mini-xo-cell svg { width: 70%; height: 70%; }
        
        .mini-static-x, .mini-anim-x { stroke: var(--neon-blue); fill: none; stroke-width: 15; stroke-linecap: round; stroke-linejoin: round; }
        .mini-static-o, .mini-anim-o { stroke: var(--neon-pink); fill: none; stroke-width: 15; stroke-linecap: round; stroke-linejoin: round; }
        
        .mini-static-x, .mini-static-o { animation: miniFade 6s infinite; }
        .mini-anim-x, .mini-anim-o { stroke-dasharray: 300; stroke-dashoffset: 300; }
        
        .mini-anim-o { animation: miniDrawO 6s infinite; }
        .mini-anim-x { animation: miniDrawX 6s infinite; }
        
        .mini-xo-win-line line {
            stroke: var(--neon-red); stroke-width: 5; stroke-linecap: round;
            stroke-dasharray: 150; stroke-dashoffset: 150;
            filter: drop-shadow(0 0 6px var(--neon-red));
            animation: miniWinLine 6s infinite;
        }
        
        @keyframes miniFade {
            0%, 10% { opacity: 0; }
            15%, 85% { opacity: 1; }
            90%, 100% { opacity: 0; }
        }
        @keyframes miniDrawO {
            0%, 25% { stroke-dashoffset: 300; opacity: 0; }
            26% { opacity: 1; stroke-dashoffset: 300; }
            35%, 85% { stroke-dashoffset: 0; opacity: 1; }
            90%, 100% { opacity: 0; stroke-dashoffset: 0; }
        }
        @keyframes miniDrawX {
            0%, 45% { stroke-dashoffset: 300; opacity: 0; }
            46% { opacity: 1; stroke-dashoffset: 300; }
            55%, 85% { stroke-dashoffset: 0; opacity: 1; }
            90%, 100% { opacity: 0; stroke-dashoffset: 0; }
        }
        @keyframes miniWinLine {
            0%, 65% { stroke-dashoffset: 150; opacity: 0; }
            66% { opacity: 1; stroke-dashoffset: 150; }
            75%, 85% { stroke-dashoffset: 0; opacity: 1; }
            90%, 100% { opacity: 0; stroke-dashoffset: 0; }
        }

        /* Dots Mini Animation - 4 sequential lines then box fill */
        .mini-dots-grid {
            --m-line-bg: rgba(44, 62, 80, 0.15);
            display: grid;
            grid-template-columns: 8px 1fr 8px 1fr 8px;
            grid-template-rows: 8px 1fr 8px 1fr 8px;
            width: 100%; height: 100%; gap: 2px;
            background-color: var(--paper-bg);
            border-radius: 4px;
            border: 2px solid var(--ink-dark);
            padding: 4px;
        }
        [data-theme*="dark"] .mini-dots-grid { --m-line-bg: rgba(255, 255, 255, 0.15); }
        .mini-dot { background: var(--ink-dark); border-radius: 50%; }
        .mini-line { background: var(--m-line-bg); border-radius: 2px; }
        .mini-box { background: transparent; transition: background-color 0.3s; border-radius: 2px; display: flex; align-items: center; justify-content: center;}
        
        .mini-line.anim-1 { animation: mLine1 4s infinite; }
        .mini-line.anim-2 { animation: mLine2 4s infinite; }
        .mini-line.anim-3 { animation: mLine3 4s infinite; }
        .mini-line.anim-4 { animation: mLine4 4s infinite; }
        .mini-box.anim-box { animation: mBox 4s infinite; }
        
        .mini-draw-p {
            fill: none; stroke: var(--neon-red); stroke-width: 15; stroke-linecap: round; stroke-linejoin: round;
            stroke-dasharray: 300; stroke-dashoffset: 300;
            animation: miniDrawP 4s infinite;
        }
        
        @keyframes miniDrawP {
            0%, 65% { stroke-dashoffset: 300; opacity: 1; }
            75%, 85% { stroke-dashoffset: 0; opacity: 1; }
            90%, 100% { stroke-dashoffset: 0; opacity: 0; }
        }
        @keyframes mLine1 { 
            0%, 10% { background: var(--m-line-bg); box-shadow: none; } 
            15%, 85% { background: var(--neon-blue); box-shadow: 0 0 5px var(--neon-blue); } 
            90%, 100% { background: var(--m-line-bg); box-shadow: none; } 
        }
        @keyframes mLine2 { 
            0%, 25% { background: var(--m-line-bg); box-shadow: none; } 
            30%, 85% { background: var(--neon-red); box-shadow: 0 0 5px var(--neon-red); } 
            90%, 100% { background: var(--m-line-bg); box-shadow: none; } 
        }
        @keyframes mLine3 { 
            0%, 40% { background: var(--m-line-bg); box-shadow: none; } 
            45%, 85% { background: var(--neon-blue); box-shadow: 0 0 5px var(--neon-blue); } 
            90%, 100% { background: var(--m-line-bg); box-shadow: none; } 
        }
        @keyframes mLine4 { 
            0%, 55% { background: var(--m-line-bg); box-shadow: none; } 
            60%, 85% { background: var(--neon-red); box-shadow: 0 0 5px var(--neon-red); } 
            90%, 100% { background: var(--m-line-bg); box-shadow: none; } 
        }
        @keyframes mBox { 
            0%, 65% { background: transparent; } 
            70%, 85% { background: rgba(255, 51, 51, 0.15); } 
            90%, 100% { background: transparent; } 
        }

        .game-card h2 {
            font-size: 1.8rem;
            margin-bottom: 8px;
            -webkit-text-stroke: 1px var(--stroke-color, var(--ink-dark));
        }
        .game-card p {
            font-size: 0.95rem;
            line-height: 1.4;
        }
        /* Reduced shine on menu titles for eye comfort */
        .game-card.xo-card h2 { color: var(--neon-blue); text-shadow: 0 0 2px rgba(0, 243, 255, 0.8); }
        .game-card.dots-card h2 { color: var(--neon-pink); text-shadow: 0 0 2px rgba(255, 0, 234, 0.8); }

        .back-btn {
            position: absolute;
            top: 15px;
            left: 15px;
            z-index: 100;
            padding: 8px 16px;
            font-size: 0.95rem;
            background: var(--paper-bg);
            color: var(--ink-dark);
            border: 2px solid var(--ink-dark);
            box-shadow: 4px 4px 0px rgba(0,0,0,0.1);
            cursor: pointer;
        }
        .back-btn:hover {
            background: var(--ink-dark);
            color: var(--paper-bg);
        }

        /* --- SHARED HUD & OVERLAY STYLES --- */
        .hud {
            width: 100%;
            max-width: 400px;
            display: flex;
            justify-content: space-between;
            align-items: flex-end;
            margin-bottom: 20px;
            padding: 0 10px;
        }
        .player-info {
            font-size: 1.2rem;
            font-weight: bold;
            display: flex;
            flex-direction: column;
            align-items: center;
            transition: opacity 0.3s;
        }
        .player-info.inactive { opacity: 0.3; }
        .p1-color { color: #0099ff; text-shadow: 0 0 5px var(--neon-blue); }
        .p2-color { color: #cc00bb; text-shadow: 0 0 5px var(--neon-pink); }
        .round-info { text-align: center; }
        .round-info h2 { font-size: 1.5rem; text-transform: uppercase; letter-spacing: 2px; }
        .time-limit-display {
            font-size: 0.9rem;
            background: var(--ink-dark);
            color: var(--paper-bg);
            padding: 2px 8px;
            border-radius: 10px;
            margin-top: 5px;
        }
        .timer-container {
            width: 100%;
            max-width: 400px;
            height: 10px;
            background: rgba(0,0,0,0.1);
            border-radius: 5px;
            margin-bottom: 30px;
            overflow: hidden;
            box-shadow: inset 0 2px 4px rgba(0,0,0,0.1);
        }
        .timer-bar {
            height: 100%;
            width: 100%;
            transform-origin: left;
            transition: background-color 0.2s;
        }
        .board-container {
            position: relative;
            width: 90vw;
            max-width: 400px;
            aspect-ratio: 1;
        }
        .overlay {
            position: absolute;
            top: 0; left: 0; width: 100%; height: 100%;
            background: rgba(244, 241, 235, 0.9);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            z-index: 10;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s;
            border-radius: 8px;
        }
        .overlay.active { opacity: 1; pointer-events: all; }
        .overlay h1 { font-size: 2.5rem; margin-bottom: 10px; text-align: center; -webkit-text-stroke: 1px var(--stroke-color, var(--ink-dark)); }
        /* Fix mobile WebKit bug where parent text-stroke overpowers inline child fill colors */
        .overlay h1[style*="var(--neon-"], 
        .overlay h1 span[style*="var(--neon-"] {
            -webkit-text-stroke: 1px currentColor !important;
            -webkit-text-fill-color: currentColor !important;
        }
        .overlay p { font-size: 1.2rem; margin-bottom: 20px; text-align: center; }

        button {
            padding: 12px 24px;
            font-size: 1.2rem;
            font-weight: bold;
            background: var(--ink-dark);
            color: var(--paper-bg);
            border: none;
            border-radius: 4px;
            cursor: pointer;
            box-shadow: 4px 4px 0px rgba(0,0,0,0.2);
            transition: transform 0.1s, box-shadow 0.1s;
        }
        button:hover {
            transform: translate(-2px, -2px);
            box-shadow: 6px 6px 0px rgba(0,0,0,0.2);
        }
        button:active {
            transform: translate(2px, 2px);
            box-shadow: 0px 0px 0px rgba(0,0,0,0.2);
        }

        /* --- GAME 1: XO STYLES --- */
        .board {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            grid-template-rows: repeat(3, 1fr);
            width: 100%; height: 100%; gap: 4px;
            background-color: var(--ink-dark);
            border: 4px solid var(--ink-dark);
            border-radius: 8px;
            box-shadow: 10px 10px 0px rgba(0,0,0,0.1);
        }
        .cell {
            background-color: var(--paper-bg);
            display: flex; align-items: center; justify-content: center;
            cursor: pointer; transition: background-color 0.2s;
        }
        .cell:hover { background-color: var(--cell-hover); }
        .cell svg { width: 70%; height: 70%; filter: drop-shadow(0px 0px 8px currentColor); }
        .draw-path {
            fill: none; stroke-width: 12; stroke-linecap: round; stroke-linejoin: round;
            stroke-dasharray: 300; stroke-dashoffset: 300;
            animation: draw 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
        }
        .draw-x { stroke: var(--neon-blue); color: var(--neon-blue); }
        .draw-o { stroke: var(--neon-pink); color: var(--neon-pink); }
        @keyframes draw { to { stroke-dashoffset: 0; } }

        /* XO Win Line Animation Layer */
        #xo-win-svg {
            position: absolute; top: 0; left: 0; width: 100%; height: 100%;
            pointer-events: none; z-index: 5;
        }
        .win-line-path {
            stroke: var(--neon-red); stroke-width: 5; stroke-linecap: round;
            stroke-dasharray: 150; stroke-dashoffset: 150;
            animation: drawWinLine 0.5s ease-out forwards;
            filter: drop-shadow(0 0 6px var(--neon-red));
        }
        @keyframes drawWinLine { to { stroke-dashoffset: 0; } }

        /* --- GAME 2: DOTS & BOXES STYLES --- */
        .dots-board {
            display: grid;
            grid-template-columns: 12px 1fr 12px 1fr 12px 1fr 12px;
            grid-template-rows: 12px 1fr 12px 1fr 12px 1fr 12px;
            width: 100%; height: 100%; gap: 2px;
            background-color: var(--paper-bg);
            border: 4px solid var(--ink-dark);
            border-radius: 8px;
            box-shadow: 10px 10px 0px rgba(0,0,0,0.1);
            padding: 8px;
        }
        .dot {
            background-color: var(--ink-dark);
            border-radius: 50%;
            z-index: 2;
        }
        .line {
            background-color: rgba(44, 62, 80, 0.1);
            cursor: pointer;
            transition: background-color 0.2s;
            position: relative; /* Crucial for pseudo-elements */
        }
        [data-theme*="dark"] .line { background-color: rgba(255, 255, 255, 0.15); }
        
        /* Mobile-Friendly Hitboxes: Invisibly expands clickable area */
        .h-line::after { content: ''; position: absolute; top: -15px; bottom: -15px; left: 0; right: 0; z-index: 5; }
        .v-line::after { content: ''; position: absolute; left: -15px; right: -15px; top: 0; bottom: 0; z-index: 5; }
        
        /* Drawing Animation Pseudo-element */
        .line::before {
            content: ''; position: absolute; top: 0; left: 0; border-radius: inherit;
            transition: width 0.25s ease-out, height 0.25s ease-out, background-color 0.25s, box-shadow 0.25s;
        }
        .h-line::before { width: 0; height: 100%; }
        .v-line::before { width: 100%; height: 0; }

        .line:hover { background-color: rgba(44, 62, 80, 0.3); }
        [data-theme*="dark"] .line:hover { background-color: rgba(255, 255, 255, 0.3); }
        
        .line.active-p1 { cursor: default; }
        .line.active-p1::before { width: 100%; height: 100%; background-color: var(--neon-blue); box-shadow: 0 0 10px var(--neon-blue); }
        
        .line.active-p2 { cursor: default; }
        .line.active-p2::before { width: 100%; height: 100%; background-color: var(--neon-pink); box-shadow: 0 0 10px var(--neon-pink); }

        .dots-box {
            background-color: transparent;
            transition: background-color 0.3s;
            display: flex; align-items: center; justify-content: center;
        }
        .dots-box.filled-p1 {
            background-color: rgba(0, 243, 255, 0.15);
            color: var(--neon-blue);
        }
        .dots-box.filled-p2 {
            background-color: rgba(255, 0, 234, 0.15);
            color: var(--neon-pink);
        }
        .dots-box svg {
            width: 60%; height: 60%;
            filter: drop-shadow(0 0 5px currentColor);
        }

        /* --- GAME 3: NEON CHAIN STYLES --- */
        .cascade-board {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            grid-template-rows: repeat(6, 1fr);
            width: 100%; height: 100%; gap: 2px;
            background-color: var(--ink-dark);
            border: 4px solid var(--ink-dark);
            border-radius: 8px;
            box-shadow: 10px 10px 0px rgba(0,0,0,0.1);
            position: relative; 
        }
        .cascade-cell {
            background-color: var(--paper-bg);
            display: flex; align-items: center; justify-content: center; position: relative;
            cursor: pointer; transition: background-color 0.2s;
        }
        .cascade-cell:hover { background-color: var(--cell-hover); }
        
        /* Color takeover explosion animation on the cell background */
        .cascade-cell.takeover-p1 { animation: colorSplashBlue 0.3s ease-out; }
        .cascade-cell.takeover-p2 { animation: colorSplashPink 0.3s ease-out; }
        @keyframes colorSplashBlue { 0% { background-color: var(--neon-blue); box-shadow: inset 0 0 20px var(--neon-blue); } 100% { background-color: var(--paper-bg); } }
        @keyframes colorSplashPink { 0% { background-color: var(--neon-pink); box-shadow: inset 0 0 20px var(--neon-pink); } 100% { background-color: var(--paper-bg); } }
        
        .orb-container {
            width: 100%; height: 100%; position: relative;
            display: flex; align-items: center; justify-content: center;
        }
        .orb-container.count-2, .orb-container.count-3 { animation: spinContainer 3s linear infinite; }
        
        .cascade-orb {
            width: 12px; height: 12px; border-radius: 50%; position: absolute;
            transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
        }
        /* Newly added orb water-drop entry */
        .cascade-orb.new-drop { animation: orbDrop 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards; }
        @keyframes orbDrop { 0% { transform: scale(0) translateY(-10px); filter: brightness(2); } 100% { transform: scale(1) translateY(0); filter: brightness(1); } }

        .cascade-orb.p1 { background-color: var(--neon-blue); box-shadow: 0 0 8px var(--neon-blue); }
        .cascade-orb.p2 { background-color: var(--neon-pink); box-shadow: 0 0 8px var(--neon-pink); }

        /* Smoothly interpolate dot positions without resetting the spin */
        .count-1 .cascade-orb:nth-child(1) { transform: translate(0,0); animation: pulseOrb 2s infinite; }
        .count-2 .cascade-orb:nth-child(1) { transform: translate(-8px,0); }
        .count-2 .cascade-orb:nth-child(2) { transform: translate(8px,0); }
        .count-3 .cascade-orb:nth-child(1) { transform: translate(0,-9px); }
        .count-3 .cascade-orb:nth-child(2) { transform: translate(-8px,7px); }
        .count-3 .cascade-orb:nth-child(3) { transform: translate(8px,7px); }

        @keyframes spinContainer { 100% { transform: rotate(360deg); } }
        @keyframes pulseOrb { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.3); } }

        /* Flying Orbs for Explosion Animation (Jumping Curve) */
        .cascade-orb.flyer {
            position: absolute; z-index: 20; margin: 0;
            animation: flyOrbX 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards, flyOrbY 0.3s cubic-bezier(0.5, -0.5, 0.75, 0) forwards;
        }
        @keyframes flyOrbX { 0% { left: var(--sx); } 100% { left: var(--ex); } }
        @keyframes flyOrbY { 0% { top: var(--sy); } 100% { top: var(--ey); } }

        .game-card.cascade-card h2 { color: #00e676; text-shadow: 0 0 2px rgba(0, 230, 118, 0.8); }
        
        /* Mini Chain Card Showcase Animation */
        .mini-casc-showcase { 
            position: relative; width: 100%; height: 100%; 
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            grid-template-rows: repeat(3, 1fr);
            gap: 2px;
            background-color: var(--ink-dark);
            border: 2px solid var(--ink-dark);
            border-radius: 4px;
            padding: 2px;
        }
        .mc-cell {
            background: var(--paper-bg); border-radius: 2px;
            display: flex; align-items: center; justify-content: center;
            position: relative;
        }
        
        .mc-container { width: 100%; height: 100%; position: relative; animation: mcSpin 2s linear infinite; }
        .mc-container.center { animation: mcSpin 2s linear infinite, mcCenterVanish 4s infinite; }
        .mc-orb { width: 8px; height: 8px; border-radius: 50%; position: absolute; }
        
        .mc-orb.blue { background: var(--neon-blue); box-shadow: 0 0 4px var(--neon-blue); }
        .mc-orb.pink { background: var(--neon-pink); box-shadow: 0 0 4px var(--neon-pink); }
        
        /* Center container: 3 dots spinning, 4th drops in */
        .mc-container.center .mc-orb:nth-child(1) { top: 4px; left: 15px; }
        .mc-container.center .mc-orb:nth-child(2) { top: 22px; left: 4px; }
        .mc-container.center .mc-orb:nth-child(3) { top: 22px; left: 26px; }
        .mc-container.center .mc-orb.fourth { top: 16px; left: 15px; opacity: 0; animation: mcFourthDrop 4s infinite; }
        
        /* Edge containers: start pink (1 dot), convert to blue (2 dots) */
        .mc-container.edge .mc-orb:nth-child(1) { top: 14px; left: 15px; animation: mcColorChange1 4s infinite; }
        .mc-container.edge .mc-orb:nth-child(2) { top: 14px; left: 22px; opacity: 0; animation: mcColorChange2 4s infinite; }

        @keyframes mcSpin { 100% { transform: rotate(360deg); } }
        @keyframes mcFourthDrop { 
            0%, 10% { opacity: 0; transform: scale(0.2); }
            15%, 25% { opacity: 1; transform: scale(1.2); }
            30%, 100% { opacity: 0; }
        }
        @keyframes mcCenterVanish {
            0%, 25% { opacity: 1; }
            30%, 80% { opacity: 0; }
            85%, 100% { opacity: 1; }
        }
        
        .mc-flyer {
            position: absolute; width: 8px; height: 8px; border-radius: 50%;
            background: var(--neon-blue); box-shadow: 0 0 4px var(--neon-blue);
            top: 57px; left: 57px; opacity: 0; animation: mcFly 4s infinite;
        }
        .mc-flyer.f-top { --tx: 0; --ty: -40px; }
        .mc-flyer.f-bottom { --tx: 0; --ty: 40px; }
        .mc-flyer.f-left { --tx: -40px; --ty: 0; }
        .mc-flyer.f-right { --tx: 40px; --ty: 0; }
        
        @keyframes mcFly {
            0%, 25% { opacity: 0; transform: translate(0,0); }
            30% { opacity: 1; transform: translate(0,0); }
            40% { opacity: 1; transform: translate(var(--tx), var(--ty)); }
            45%, 100% { opacity: 0; transform: translate(var(--tx), var(--ty)); }
        }
        
        @keyframes mcColorChange1 {
            0%, 40% { background: var(--neon-pink); box-shadow: 0 0 4px var(--neon-pink); transform: translateX(0); }
            45%, 85% { background: var(--neon-blue); box-shadow: 0 0 4px var(--neon-blue); transform: translateX(-6px); }
            90%, 100% { background: var(--neon-pink); box-shadow: 0 0 4px var(--neon-pink); transform: translateX(0); }
        }
        @keyframes mcColorChange2 {
            0%, 40% { opacity: 0; background: var(--neon-blue); box-shadow: 0 0 4px var(--neon-blue); }
            45%, 85% { opacity: 1; background: var(--neon-blue); box-shadow: 0 0 4px var(--neon-blue); }
            90%, 100% { opacity: 0; background: var(--neon-blue); box-shadow: 0 0 4px var(--neon-blue); }
        }

        /* --- GAME 4: SUDOKU WAR STYLES --- */
        .sudoku-board {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            grid-template-rows: repeat(6, 1fr);
            width: 100%; height: 100%; gap: 2px;
            background-color: var(--ink-dark);
            border: 4px solid var(--ink-dark);
            border-radius: 8px;
            box-shadow: 10px 10px 0px rgba(0,0,0,0.1);
            position: relative;
        }
        .sudoku-cell {
            background-color: var(--paper-bg);
            display: flex; align-items: center; justify-content: center;
            font-size: 1.8rem; font-weight: bold; cursor: pointer; 
            transition: background-color 0.2s, transform 0.2s; position: relative;
        }
        .sudoku-cell.block-r { border-right: 3px solid var(--ink-dark); }
        .sudoku-cell.block-b { border-bottom: 3px solid var(--ink-dark); }
        
        .sudoku-cell:hover { background-color: var(--cell-hover); }
        
        /* Inner Border Highlight for Crosshair */
        .sudoku-cell.active-cross { box-shadow: inset 0 0 0 4px rgba(44, 62, 80, 0.25); background-color: var(--paper-bg); z-index: 2; }
        .sudoku-cell.p1 { color: var(--neon-blue); text-shadow: 0 0 5px var(--neon-blue); }
        .sudoku-cell.p2 { color: var(--neon-pink); text-shadow: 0 0 5px var(--neon-pink); }
        
        /* Sequence Dance Animation */
        .sudoku-cell.sequence-dance { animation: seqDance 1s infinite alternate; z-index: 3; }
        @keyframes seqDance {
            0% { transform: scale(1); filter: brightness(1); }
            100% { transform: scale(1.15) rotate(3deg); filter: brightness(1.2); box-shadow: 0 0 10px currentColor; }
        }

        /* Error Shake for Full/Invalid Cells */
        .sudoku-cell.error-red { animation: errorShake 0.4s; background-color: var(--neon-red) !important; color: #fff !important; z-index: 4; }
        @keyframes errorShake {
            0%, 100% { transform: translateX(0); }
            20%, 60% { transform: translateX(-5px); }
            40%, 80% { transform: translateX(5px); }
        }
        
        /* Contextual Floating Popup */
        .sudoku-popup {
            position: absolute; width: 140px;
            background-color: rgba(244, 241, 235, 0.95); backdrop-filter: blur(4px);
            border: 2px solid var(--ink-dark); box-shadow: 0 8px 16px rgba(0,0,0,0.3);
            display: none; flex-wrap: wrap; align-content: center; justify-content: center; gap: 8px;
            z-index: 20; border-radius: 8px; padding: 10px;
            transition: background-color 0.4s ease, border-color 0.4s ease;
        }
        [data-theme="dark"] .sudoku-popup { background-color: rgba(18, 22, 26, 0.95); }
        [data-theme="baby-dark"] .sudoku-popup, [data-theme="kid-dark"] .sudoku-popup { background-color: rgba(51, 0, 26, 0.95); }
        .sudoku-popup.active { display: flex; animation: popIn 0.2s ease-out forwards; }
        @keyframes popIn { 0% { opacity: 0; transform: scale(0.9); } 100% { opacity: 1; transform: scale(1); } }
        
        .sudoku-btn {
            width: 35px; height: 35px; border-radius: 6px; border: 2px solid var(--ink-dark);
            background: var(--paper-bg); font-size: 1.2rem; font-weight: bold; color: var(--ink-dark);
            cursor: pointer; display: flex; align-items: center; justify-content: center;
            box-shadow: 2px 2px 0px rgba(0,0,0,0.1); transition: transform 0.1s, opacity 0.2s, background-color 0.4s ease, color 0.4s ease, border-color 0.4s ease;
        }
        .sudoku-btn:active { transform: translate(1px, 1px); box-shadow: 0px 0px 0px rgba(0,0,0,0.1); }
        .sudoku-btn.disabled { opacity: 0.15; pointer-events: none; }
        
        .game-card.sudoku-card h2 { color: #ff9d00; text-shadow: 0 0 2px rgba(255, 157, 0, 0.8); }
        
        .mini-sudoku-grid {
            display: grid; grid-template-columns: repeat(3, 1fr); grid-template-rows: repeat(3, 1fr);
            width: 100%; height: 100%; gap: 2px; background: var(--ink-dark); border: 2px solid var(--ink-dark); padding: 2px; border-radius: 4px;
        }
        .mini-sudo-cell { background: var(--paper-bg); display: flex; align-items: center; justify-content: center; font-weight: bold; font-size: 1.4rem; border-radius: 2px;}
        .mini-sudo-cell.p1 { color: var(--neon-blue); text-shadow: 0 0 3px var(--neon-blue); animation: sudoPop 2s infinite; }
        .mini-sudo-cell.p2 { color: var(--neon-pink); text-shadow: 0 0 3px var(--neon-pink); animation: sudoPop 2s infinite 1s; }
        @keyframes sudoPop { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.2); } }

        /* Action Highlight Effects */
        .move-ping {
            position: absolute; top: 0; left: 0; width: 100%; height: 100%;
            border-radius: 50%; border: 3px solid currentColor;
            animation: pingWave 0.6s ease-out forwards; pointer-events: none; z-index: 10;
        }
        .move-ping.p1 { color: var(--neon-blue); }
        .move-ping.p2 { color: var(--neon-pink); }
        @keyframes pingWave {
            0% { transform: scale(0.2); opacity: 1; border-width: 4px; }
            100% { transform: scale(3.5); opacity: 0; border-width: 0px; }
        }

        .sudoku-cell .new-number {
            display: inline-block;
            animation: writeNumber 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
            clip-path: inset(0 100% 0 0); /* Starts hidden to simulate pen stroke */
        }
        @keyframes writeNumber {
            0% { clip-path: inset(0 100% 0 0); transform: scale(1.3) rotate(-10deg); }
            100% { clip-path: inset(0 0 0 0); transform: scale(1) rotate(0deg); }
        }

        /* --- GAME 5: REVERSI ARENA STYLES --- */
        .reversi-board {
            display: grid;
            grid-template-columns: repeat(8, 1fr);
            grid-template-rows: repeat(8, 1fr);
            width: 100%; height: 100%; gap: 2px;
            background-color: var(--ink-dark);
            border: 4px solid var(--ink-dark);
            border-radius: 8px;
            box-shadow: 10px 10px 0px rgba(0,0,0,0.1);
            position: relative;
        }
        .reversi-cell {
            background-color: var(--paper-bg);
            display: flex; align-items: center; justify-content: center;
            cursor: pointer; transition: background-color 0.2s; position: relative;
        }
        .reversi-cell:hover { background-color: var(--cell-hover); }
        
        .reversi-piece {
            width: 75%; height: 75%; border-radius: 50%; position: absolute;
            transition: transform 0.2s;
        }
        .reversi-piece.p1 { background-color: var(--neon-blue); box-shadow: 0 0 10px var(--neon-blue), inset 0 0 8px rgba(0,0,0,0.3); }
        .reversi-piece.p2 { background-color: var(--neon-pink); box-shadow: 0 0 10px var(--neon-pink), inset 0 0 8px rgba(0,0,0,0.3); }
        
        /* Setup Phase Drop Animation */
        .reversi-piece.setup-drop { animation: revSetupDrop 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards; }
        @keyframes revSetupDrop {
            0% { transform: scale(0) translateY(-20px); opacity: 0; filter: brightness(2); }
            100% { transform: scale(1) translateY(0); opacity: 1; filter: brightness(1); }
        }

        /* Color Transition Eating Animation */
        .reversi-piece.eat-flip-to-p1 { animation: flipToP1 0.5s ease-in-out forwards; z-index: 10; }
        .reversi-piece.eat-flip-to-p2 { animation: flipToP2 0.5s ease-in-out forwards; z-index: 10; }
        
        @keyframes flipToP1 {
            0% { transform: scale(1) rotateY(0deg); background-color: var(--neon-pink); box-shadow: 0 0 10px var(--neon-pink), inset 0 0 8px rgba(0,0,0,0.3); }
            49% { transform: scale(1.3) rotateY(90deg); background-color: var(--neon-pink); box-shadow: 0 0 10px var(--neon-pink), inset 0 0 8px rgba(0,0,0,0.3); }
            50% { transform: scale(1.3) rotateY(-90deg); filter: brightness(2); background-color: var(--neon-blue); box-shadow: 0 0 10px var(--neon-blue), inset 0 0 8px rgba(0,0,0,0.3); }
            100% { transform: scale(1) rotateY(0deg); background-color: var(--neon-blue); box-shadow: 0 0 10px var(--neon-blue), inset 0 0 8px rgba(0,0,0,0.3); }
        }
        @keyframes flipToP2 {
            0% { transform: scale(1) rotateY(0deg); background-color: var(--neon-blue); box-shadow: 0 0 10px var(--neon-blue), inset 0 0 8px rgba(0,0,0,0.3); }
            49% { transform: scale(1.3) rotateY(90deg); background-color: var(--neon-blue); box-shadow: 0 0 10px var(--neon-blue), inset 0 0 8px rgba(0,0,0,0.3); }
            50% { transform: scale(1.3) rotateY(-90deg); filter: brightness(2); background-color: var(--neon-pink); box-shadow: 0 0 10px var(--neon-pink), inset 0 0 8px rgba(0,0,0,0.3); }
            100% { transform: scale(1) rotateY(0deg); background-color: var(--neon-pink); box-shadow: 0 0 10px var(--neon-pink), inset 0 0 8px rgba(0,0,0,0.3); }
        }

        .valid-move-dot {
            --dot-opacity: 0.25;
            width: 25%; height: 25%; border-radius: 50%; opacity: 0;
            transition: transform 0.2s, opacity 0.2s; pointer-events: none;
            animation: dotDrop 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
        }
        [data-theme*="dark"] .valid-move-dot { --dot-opacity: 0.5; }
        @keyframes dotDrop {
            0% { transform: scale(0) translateY(-15px); opacity: 0; filter: brightness(2); }
            100% { transform: scale(1) translateY(0); opacity: var(--dot-opacity, 0.25); filter: brightness(1); }
        }
        
        .valid-move-dot.p1 { background-color: var(--neon-blue); box-shadow: 0 0 5px var(--neon-blue); }
        .valid-move-dot.p2 { background-color: var(--neon-pink); box-shadow: 0 0 5px var(--neon-pink); }
        .reversi-cell:hover .valid-move-dot { transform: scale(1.8) !important; opacity: 0.8 !important; }

        /* Elevating Jump Animation Elements (Linear Diagonal Fixed) */
        .rev-jumper {
            position: absolute; z-index: 30; border-radius: 50%; margin: 0;
            left: var(--sx); top: var(--sy);
            animation: revJump 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
        }
        .rev-jumper.p1 { background-color: var(--neon-blue); box-shadow: 0 0 10px var(--neon-blue), inset 0 0 8px rgba(0,0,0,0.3); }
        .rev-jumper.p2 { background-color: var(--neon-pink); box-shadow: 0 0 10px var(--neon-pink), inset 0 0 8px rgba(0,0,0,0.3); }
        
        @keyframes revJump {
            0% { transform: translate(0px, 0px) scale(1); filter: brightness(1); }
            50% { transform: translate(calc(var(--dx) / 2), calc(var(--dy) / 2)) scale(1.6); filter: brightness(2); }
            100% { transform: translate(var(--dx), var(--dy)) scale(1); filter: brightness(1); }
        }
        .hide-temp { animation: revealAfterJump 0.5s step-end forwards; }
        @keyframes revealAfterJump { 0% { opacity: 0; } 100% { opacity: 1; } }

        /* Lives HUD Display */
        .lives-display {
            font-size: 0.95rem; margin-top: 5px; font-weight: bold;
            display: flex; justify-content: center; gap: 8px;
            background: rgba(0,0,0,0.05); padding: 2px 8px; border-radius: 10px;
        }
        .lives-display span { transition: color 0.2s; letter-spacing: 2px; }

        .game-card.reversi-card h2 { color: #a200ff; text-shadow: 0 0 2px rgba(162, 0, 255, 0.8); }
        
        .mini-rev-grid {
            display: grid; grid-template-columns: repeat(4, 1fr); grid-template-rows: repeat(4, 1fr);
            width: 100%; height: 100%; gap: 2px; background: var(--ink-dark); border: 2px solid var(--ink-dark); padding: 2px; border-radius: 4px;
        }
        .mini-rev-cell { background: var(--paper-bg); display: flex; align-items: center; justify-content: center; border-radius: 2px;}
        .mini-rev-piece { width: 85%; height: 85%; border-radius: 50%; }
        .mini-rev-piece.p1 { background: var(--neon-blue); box-shadow: 0 0 3px var(--neon-blue); }
        .mini-rev-piece.p2 { background: var(--neon-pink); box-shadow: 0 0 3px var(--neon-pink); }
        .mini-rev-piece.mrev-drop { animation: mRevDrop 4s infinite ease-in-out; }
        .mini-rev-piece.flipper { animation: mRevTrapFlip 4s infinite ease-in-out; }
        
        @keyframes mRevDrop {
            0%, 20% { opacity: 0; transform: scale(0) translateY(-10px); }
            25%, 85% { opacity: 1; transform: scale(1) translateY(0); }
            90%, 100% { opacity: 0; transform: scale(1); }
        }
        
        @keyframes mRevTrapFlip {
            0%, 35% { background: var(--neon-pink); box-shadow: 0 0 3px var(--neon-pink); transform: rotateY(0deg); }
            40%, 45% { transform: rotateY(90deg) scale(1.3); filter: brightness(1.5); }
            50%, 85% { background: var(--neon-blue); box-shadow: 0 0 3px var(--neon-blue); transform: rotateY(180deg); }
            90%, 100% { background: var(--neon-pink); box-shadow: 0 0 3px var(--neon-pink); transform: rotateY(0deg); }
        }

        /* --- GAME 6: NEON CHECKERS STYLES --- */
        .checkers-board {
            display: grid; grid-template-columns: repeat(8, 1fr); grid-template-rows: repeat(8, 1fr);
            width: 100%; height: 100%; gap: 2px; background-color: var(--ink-dark);
            border: 4px solid var(--ink-dark); border-radius: 8px; box-shadow: 10px 10px 0px rgba(0,0,0,0.1); position: relative;
        }
        .checkers-cell { display: flex; align-items: center; justify-content: center; position: relative; }
        .checkers-cell.light { background-color: var(--paper-bg); }
        .checkers-cell.dark { background-color: var(--board-dark-cell); cursor: pointer; transition: filter 0.2s; }
        .checkers-cell.dark:hover { filter: brightness(1.2); }
        
        .checkers-piece {
            width: 75%; height: 75%; border-radius: 50%; position: absolute; z-index: 5;
            transition: transform 0.2s, box-shadow 0.2s, filter 0.2s;
        }
        .checkers-piece.p1 { background-color: var(--neon-blue); box-shadow: 0 0 10px var(--neon-blue), inset 0 0 8px rgba(0,0,0,0.3); }
        .checkers-piece.p2 { background-color: var(--neon-pink); box-shadow: 0 0 10px var(--neon-pink), inset 0 0 8px rgba(0,0,0,0.3); }
        .checkers-piece.king::after {
            content: ''; position: absolute; top: 20%; left: 20%; right: 20%; bottom: 20%;
            border: 3px solid rgba(255,255,255,0.8); border-radius: 50%; box-shadow: inset 0 0 5px rgba(255,255,255,0.5), 0 0 5px rgba(255,255,255,0.5);
        }
        .checkers-piece.selected { transform: scale(1.15); filter: brightness(1.3); z-index: 10; box-shadow: 0 0 20px currentColor; }
        
        /* Disambiguation UI */
        .checkers-board.disambig .checkers-piece:not(.candidate) { filter: brightness(0.4) grayscale(0.6); }
        .checkers-piece.candidate { animation: candidatePulse 0.6s infinite alternate; cursor: pointer; z-index: 26; box-shadow: 0 0 25px rgba(255,255,255,0.8), inset 0 0 10px rgba(255,255,255,0.8) !important; border: 2px solid white; }
        @keyframes candidatePulse { from { transform: scale(1.1); } to { transform: scale(1.35); } }
        
        #chk-action-svg { position: absolute; top: 0; left: 0; width: 100%; height: 100%; pointer-events: none; z-index: 20; }
        .chk-arrow { stroke: rgba(255, 255, 255, 0.9); stroke-width: 4; stroke-linecap: round; fill: none; stroke-dasharray: 8 8; animation: dashMove 0.5s linear infinite; filter: drop-shadow(0 0 4px white); }
        .chk-arrow-head { fill: rgba(255, 255, 255, 0.9); filter: drop-shadow(0 0 4px white); }
        @keyframes dashMove { to { stroke-dashoffset: -16; } }

        .chk-valid-dot {
            --dot-opacity: 0.5;
            width: 25%; height: 25%; border-radius: 50%; opacity: 0; pointer-events: none;
            transition: transform 0.2s, opacity 0.2s;
            animation: dotDrop 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
        }
        .chk-valid-dot.p1 { background-color: var(--neon-blue); box-shadow: 0 0 5px var(--neon-blue); }
        .chk-valid-dot.p2 { background-color: var(--neon-pink); box-shadow: 0 0 5px var(--neon-pink); }
        .checkers-cell.dark:hover .chk-valid-dot { transform: scale(1.8) !important; opacity: 0.8 !important; }
        
        .game-card.checkers-card h2 { color: #ff0055; text-shadow: 0 0 2px rgba(255, 0, 85, 0.8); }
        
        /* Mini Checkers Animation */
        .mini-chk-grid {
            display: grid; grid-template-columns: repeat(4, 1fr); grid-template-rows: repeat(4, 1fr);
            width: 100%; height: 100%; gap: 2px; background: var(--ink-dark); border: 2px solid var(--ink-dark); padding: 2px; border-radius: 4px;
        }
        .mini-chk-cell { background: var(--board-dark-cell); border-radius: 2px; display: flex; align-items: center; justify-content: center; }
        .mini-chk-cell.light { background: var(--paper-bg); }
        .mchk-piece { width: 75%; height: 75%; border-radius: 50%; background: var(--neon-blue); box-shadow: 0 0 3px var(--neon-blue); }
        .mchk-piece.p2 { background: var(--neon-pink); box-shadow: 0 0 3px var(--neon-pink); }
        .mchk-target { animation: mChkDie 4s infinite; }
        .mchk-jumper { position: relative; animation: mChkJump 4s infinite cubic-bezier(0.25, 0.46, 0.45, 0.94); z-index: 10; }
        
        @keyframes mChkJump {
            0%, 20% { transform: translate(0, 0) scale(1); opacity: 1; }
            35% { transform: translate(-29.5px, -29.5px) scale(1.4); filter: brightness(1.5); opacity: 1; }
            50%, 80% { transform: translate(-59px, -59px) scale(1); filter: brightness(1); opacity: 1; }
            85%, 100% { transform: translate(-59px, -59px) scale(1); opacity: 0; }
        }
        @keyframes mChkDie {
            0%, 40% { opacity: 1; transform: scale(1); }
            45%, 85% { opacity: 0; transform: scale(0); }
            90%, 100% { opacity: 0; transform: scale(0); }
        }

        /* --- GAME 7: SPEED CHESS STYLES --- */
        .chess-board {
            display: grid; grid-template-columns: repeat(8, 1fr); grid-template-rows: repeat(8, 1fr);
            width: 100%; height: 100%; gap: 2px; background-color: var(--ink-dark);
            border: 4px solid var(--ink-dark); border-radius: 8px; box-shadow: 10px 10px 0px rgba(0,0,0,0.1); position: relative;
        }
        .chess-cell { display: flex; align-items: center; justify-content: center; position: relative; font-size: 2.5rem; }
        .chess-cell.light { background-color: var(--paper-bg); }
        .chess-cell.dark { background-color: var(--board-dark-cell); }
        .chess-cell.dark:hover, .chess-cell.light:hover { filter: brightness(1.1); cursor: pointer; }

        .chess-piece {
            position: absolute; z-index: 5; transition: transform 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            user-select: none; display: flex; align-items: center; justify-content: center;
        }
        .chess-piece.p1 { color: var(--neon-blue); text-shadow: 0 0 3px var(--neon-blue); }
        .chess-piece.p2 { color: var(--neon-pink); text-shadow: 0 0 3px var(--neon-pink); }
        .chess-piece.selected { transform: scale(1.15); filter: brightness(1.2); z-index: 10; }
        .chess-piece.danger { animation: chessDanger 0.4s infinite alternate; z-index: 9; }
        @keyframes chessDanger { to { color: var(--neon-red); text-shadow: 0 0 10px var(--neon-red); transform: scale(1.15); } }

        .chess-valid-dot {
            --dot-opacity: 0.5;
            width: 30%; height: 30%; border-radius: 50%; opacity: 0; pointer-events: none;
            transition: transform 0.2s, opacity 0.2s;
            animation: dotDrop 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
        }
        .chess-valid-dot.p1 { background-color: var(--neon-blue); box-shadow: 0 0 5px var(--neon-blue); }
        .chess-valid-dot.p2 { background-color: var(--neon-pink); box-shadow: 0 0 5px var(--neon-pink); }
        .chess-cell:hover .chess-valid-dot { transform: scale(1.8) !important; opacity: 0.8 !important; }

        /* Capture & Move Animations */
        .chess-capture-boom {
            position: absolute; width: 100%; height: 100%;
            display: flex; align-items: center; justify-content: center; z-index: 6;
            animation: captureShatter 0.4s ease-out forwards;
            font-size: 2.5rem; opacity: 1; pointer-events: none;
        }
        @keyframes captureShatter {
            0% { transform: scale(1) rotate(0deg); opacity: 1; filter: brightness(1); }
            50% { transform: scale(1.8) rotate(25deg); opacity: 0.8; filter: brightness(1.5) blur(2px); }
            100% { transform: scale(0) rotate(45deg); opacity: 0; filter: brightness(1) blur(4px); }
        }
        
        .chess-jumper {
            position: absolute; z-index: 30; margin: 0; display: flex; align-items: center; justify-content: center; font-size: 2.5rem;
            animation: chessJump 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
        }
        .chess-jumper.p1 { color: var(--neon-blue); text-shadow: 0 0 3px var(--neon-blue); }
        .chess-jumper.p2 { color: var(--neon-pink); text-shadow: 0 0 3px var(--neon-pink); }
        @keyframes chessJump {
            0% { transform: translate(var(--sx), var(--sy)) scale(1); }
            50% { transform: translate(calc((var(--sx) + var(--ex)) / 2), calc((var(--sy) + var(--ey)) / 2 - 20px)) scale(1.4); }
            100% { transform: translate(var(--ex), var(--ey)) scale(1); }
        }

        .game-card.chess-card h2 { color: #00c735; text-shadow: 0 0 2px rgba(0, 199, 53, 0.8); }

        /* Mini Chess Animation */
        .mini-chess-grid {
            display: grid; grid-template-columns: repeat(4, 1fr); grid-template-rows: repeat(4, 1fr);
            width: 100%; height: 100%; gap: 2px; background: var(--ink-dark); border: 2px solid var(--ink-dark); padding: 2px; border-radius: 4px;
        }
        .mini-chess-cell { background: var(--board-dark-cell); border-radius: 2px; display: flex; align-items: center; justify-content: center; font-size: 1.8rem; position: relative;}
        .mini-chess-cell.light { background: var(--paper-bg); }
        .mch-piece { position: absolute; }
        .mch-piece.p1 { color: var(--neon-blue); text-shadow: 0 0 2px var(--neon-blue); }
        .mch-piece.p2 { color: var(--neon-pink); text-shadow: 0 0 2px var(--neon-pink); }
        .mch-target { animation: mChDie 4s infinite; }
        .mch-jumper { animation: mChJump 4s infinite cubic-bezier(0.25, 0.46, 0.45, 0.94); z-index: 10; }

        @keyframes mChJump {
            0%, 20% { transform: translate(0, 0) scale(1); opacity: 1; }
            35% { transform: translate(29.5px, -29.5px) scale(1.5); filter: brightness(1.5); opacity: 1; }
            50%, 80% { transform: translate(59px, -59px) scale(1); filter: brightness(1); opacity: 1; }
            85%, 100% { transform: translate(59px, -59px) scale(1); opacity: 0; }
        }
        @keyframes mChDie {
            0%, 40% { opacity: 1; transform: scale(1) rotate(0deg); }
            45%, 85% { opacity: 0; transform: scale(1.8) rotate(25deg); filter: blur(2px); }
            90%, 100% { opacity: 0; transform: scale(0) rotate(0deg); }
        }

        /* --- GAME 8: 4 IN A ROW STYLES --- */
        .c4-board {
            display: grid; grid-template-columns: repeat(7, 1fr); grid-template-rows: repeat(6, 1fr);
            width: 100%; height: 85%; gap: 4px; background-color: var(--c4-board-bg);
            border: 4px solid var(--c4-board-bg); border-radius: 8px; box-shadow: 10px 10px 0px rgba(0,0,0,0.1); padding: 4px; position: relative;
        }
        .c4-cell {
            background-color: var(--c4-cell-bg); border-radius: 50%;
            display: flex; align-items: center; justify-content: center; position: relative;
            box-shadow: inset 0 3px 6px rgba(0,0,0,0.4); cursor: pointer;
        }
        .c4-cell.highlight-col { filter: brightness(0.9); }
        .c4-piece {
            width: 90%; height: 90%; border-radius: 50%; position: absolute; z-index: 5;
            box-shadow: inset -3px -3px 6px rgba(0,0,0,0.3), 0 2px 4px rgba(0,0,0,0.4);
        }
        .c4-piece.p1 { background-color: var(--neon-blue); box-shadow: 0 0 10px var(--neon-blue), inset -3px -3px 6px rgba(0,0,0,0.3); }
        .c4-piece.p2 { background-color: var(--neon-pink); box-shadow: 0 0 10px var(--neon-pink), inset -3px -3px 6px rgba(0,0,0,0.3); }
        .c4-piece.falling { animation: c4Drop 0.6s cubic-bezier(0.28, 0.84, 0.42, 1) forwards; }
        .c4-piece.win-pulse { animation: c4Win 0.6s infinite alternate; z-index: 10; border: 3px solid white; }

        @keyframes c4Drop {
            0% { transform: translateY(var(--drop-dist)); }
            60% { transform: translateY(0); }
            80% { transform: translateY(-20%); }
            100% { transform: translateY(0); }
        }
        @keyframes c4Win { from { filter: brightness(1); transform: scale(1); } to { filter: brightness(1.8); transform: scale(1.15); } }

        .game-card.c4-card h2 { color: #ff6a00; text-shadow: 0 0 2px rgba(255, 106, 0, 0.8); }

        /* Mini 4 In A Row Animation */
        .mini-c4-grid {
            display: grid; grid-template-columns: repeat(4, 1fr); grid-template-rows: repeat(4, 1fr);
            width: 100%; height: 100%; gap: 2px; background: var(--c4-board-bg); border: 2px solid var(--c4-board-bg); padding: 2px; border-radius: 4px;
        }
        .mini-c4-cell { background: var(--c4-cell-bg); border-radius: 50%; position: relative; box-shadow: inset 0 1px 3px rgba(0,0,0,0.5); }
        .m-c4-piece { width: 100%; height: 100%; border-radius: 50%; position: absolute; top: 0; left: 0; }
        .m-c4-piece.p1 { background: var(--neon-blue); box-shadow: inset -2px -2px 4px rgba(0,0,0,0.3); }
        .m-c4-piece.p2 { background: var(--neon-pink); box-shadow: inset -2px -2px 4px rgba(0,0,0,0.3); }
        .m-c4-drop1 { animation: mc4Drop1 4s infinite; }
        .m-c4-drop2 { animation: mc4Drop2 4s infinite; }
        .m-c4-drop3 { animation: mc4Drop3 4s infinite; }

        @keyframes mc4Drop1 { 0%, 10% { transform: translateY(-400%); opacity: 0;} 11% { transform: translateY(-400%); opacity: 1; } 20%, 80% { transform: translateY(0); opacity: 1; } 90%, 100% { transform: translateY(0); opacity: 0; } }
        @keyframes mc4Drop2 { 0%, 30% { transform: translateY(-400%); opacity: 0;} 31% { transform: translateY(-400%); opacity: 1; } 40%, 80% { transform: translateY(0); opacity: 1; } 90%, 100% { transform: translateY(0); opacity: 0; } }
        @keyframes mc4Drop3 { 0%, 50% { transform: translateY(-400%); opacity: 0;} 51% { transform: translateY(-400%); opacity: 1; } 60%, 80% { transform: translateY(0); opacity: 1; } 90%, 100% { transform: translateY(0); opacity: 0; } }

        /* --- GAME 9: NEON BATTLE STYLES --- */
        .battle-layout { display: flex; flex-direction: column; gap: 5px; width: 100%; height: 100%; align-items: center; justify-content: flex-start; padding-top: 10px; }
        .battle-board {
            display: grid; grid-template-columns: repeat(7, 1fr); grid-template-rows: repeat(7, 1fr);
            width: 100%; max-width: 320px; aspect-ratio: 1; gap: 2px; background-color: var(--ink-dark);
            border: 3px solid var(--ink-dark); border-radius: 6px; box-shadow: 5px 5px 0px rgba(0,0,0,0.1); position: relative;
        }
        .battle-cell { background-color: var(--paper-bg); display: flex; align-items: center; justify-content: center; position: relative; cursor: crosshair; }
        .battle-cell.player-cell { cursor: default; }
        
        .battle-miss { width: 100%; height: 100%; position: absolute; }
        .battle-miss.p1 { animation: splashAnimP1 0.5s ease-out forwards; }
        .battle-miss.p2 { animation: splashAnimP2 0.5s ease-out forwards; }
        @keyframes splashAnimP1 { 0% { box-shadow: inset 0 0 0 0px var(--ship-color-p1); } 100% { box-shadow: inset 0 0 0 10px var(--p1-miss-shadow); background-color: var(--p1-miss-bg); } }
        @keyframes splashAnimP2 { 0% { box-shadow: inset 0 0 0 0px var(--ship-color-p2); } 100% { box-shadow: inset 0 0 0 10px var(--p2-miss-shadow); background-color: var(--p2-miss-bg); } }
        
        .battle-hit { position: absolute; width: 80%; height: 80%; animation: boomAnim 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards; z-index: 5; }
        @keyframes boomAnim {
            0% { transform: scale(0); background-color: white; border-radius: 50%; }
            50% { transform: scale(1.5); background-color: var(--neon-red); box-shadow: 0 0 15px var(--neon-red); border-radius: 20%; }
            100% { transform: scale(1); background-color: var(--neon-red); box-shadow: 0 0 8px var(--neon-red); border-radius: 10%; }
        }
        
        .battle-sunk-model { position: absolute; z-index: 10; fill: none; stroke-width: 4; stroke-linecap: round; stroke-linejoin: round; animation: revealShip 1s ease-out forwards; filter: drop-shadow(0 0 5px currentColor); pointer-events: none; }
        .battle-sunk-model.static { animation: none; stroke-dashoffset: 0; opacity: 0.6; }
        @keyframes revealShip { 0% { stroke-dasharray: 100; stroke-dashoffset: 100; opacity: 0; } 50% { opacity: 1; } 100% { stroke-dasharray: 100; stroke-dashoffset: 0; opacity: 1; } }
        
        .game-card.battle-card h2 { color: #00ffaa; text-shadow: 0 0 2px rgba(0, 255, 170, 0.8); }

        /* Mini Battle Animation */
        .mini-bat-grid {
            display: grid; grid-template-columns: repeat(4, 1fr); grid-template-rows: repeat(4, 1fr);
            width: 100%; height: 100%; gap: 2px; background: var(--ink-dark); border: 2px solid var(--ink-dark); padding: 2px; border-radius: 4px; position: relative;
        }
        .mini-bat-cell { background: var(--paper-bg); border-radius: 2px; position: relative; display: flex; align-items: center; justify-content: center; overflow: hidden; }
        .m-bat-miss { width: 100%; height: 100%; background: rgba(0,119,255,0.2); box-shadow: inset 0 0 0 4px rgba(0,119,255,0.3); animation: mMiss 6s infinite; }
        .m-bat-hit { width: 80%; height: 80%; background: var(--neon-red); box-shadow: 0 0 5px var(--neon-red); border-radius: 2px; }
        .m-bat-hit.hit-1 { animation: mHit1 6s infinite; }
        .m-bat-hit.hit-2 { animation: mHit2 6s infinite; }
        .m-bat-hit.hit-3 { animation: mHit3 6s infinite; }
        .m-bat-ship { position: absolute; top: 12.5%; left: 12.5%; width: 75%; height: 25%; fill: none; stroke: #00ffaa; stroke-width: 3; filter: drop-shadow(0 0 3px #00ffaa); animation: mShip 6s infinite; z-index: 5; }

        @keyframes mMiss { 0%, 5% { opacity: 0; transform: scale(0); } 10%, 90% { opacity: 1; transform: scale(1); } 95%, 100% { opacity: 0; transform: scale(0); } }
        @keyframes mHit1 { 0%, 15% { opacity: 0; transform: scale(0); background: var(--neon-red); width: 80%; height: 80%; box-shadow: 0 0 5px var(--neon-red); } 20%, 55% { opacity: 1; transform: scale(1); background: var(--neon-red); width: 80%; height: 80%; box-shadow: 0 0 5px var(--neon-red); } 60%, 90% { opacity: 1; transform: scale(1); background: rgba(255, 51, 51, 0.25); width: 100%; height: 100%; box-shadow: none; } 95%, 100% { opacity: 0; transform: scale(0); } }
        @keyframes mHit2 { 0%, 30% { opacity: 0; transform: scale(0); background: var(--neon-red); width: 80%; height: 80%; box-shadow: 0 0 5px var(--neon-red); } 35%, 55% { opacity: 1; transform: scale(1); background: var(--neon-red); width: 80%; height: 80%; box-shadow: 0 0 5px var(--neon-red); } 60%, 90% { opacity: 1; transform: scale(1); background: rgba(255, 51, 51, 0.25); width: 100%; height: 100%; box-shadow: none; } 95%, 100% { opacity: 0; transform: scale(0); } }
        @keyframes mHit3 { 0%, 45% { opacity: 0; transform: scale(0); background: var(--neon-red); width: 80%; height: 80%; box-shadow: 0 0 5px var(--neon-red); } 50%, 55% { opacity: 1; transform: scale(1); background: var(--neon-red); width: 80%; height: 80%; box-shadow: 0 0 5px var(--neon-red); } 60%, 90% { opacity: 1; transform: scale(1); background: rgba(255, 51, 51, 0.25); width: 100%; height: 100%; box-shadow: none; } 95%, 100% { opacity: 0; transform: scale(0); } }
        @keyframes mShip { 0%, 55% { opacity: 0; stroke-dasharray: 100; stroke-dashoffset: 100; } 65%, 90% { opacity: 1; stroke-dashoffset: 0; } 95%, 100% { opacity: 0; } }

        /* --- GAME 10: MEMORY MATCH STYLES --- */
        .memory-board {
            display: grid; grid-template-columns: repeat(4, 1fr); grid-template-rows: repeat(4, 1fr);
            width: 100%; height: 100%; gap: 6px; background-color: var(--paper-bg);
            border: 4px solid var(--ink-dark); border-radius: 8px; box-shadow: 10px 10px 0px rgba(0,0,0,0.1); padding: 8px; position: relative; perspective: 800px;
        }
        .memory-card {
            width: 100%; height: 100%; position: relative; cursor: pointer;
            transform-style: preserve-3d; transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
        }
        .memory-card.flipped, .memory-card.matched {
            transform: rotateY(180deg);
        }
        .memory-card-face {
            position: absolute; width: 100%; height: 100%; backface-visibility: hidden;
            display: flex; align-items: center; justify-content: center; font-size: 2.5rem;
            border-radius: 6px; box-shadow: inset 0 0 5px rgba(0,0,0,0.2);
        }
        .memory-card-front { 
            background-color: var(--mem-front-bg); border: 2px solid var(--ink-dark); 
            background-image: repeating-linear-gradient(45deg, var(--mem-hatch) 0, var(--mem-hatch) 2px, transparent 2px, transparent 8px);
        }
        .memory-card-front:hover { filter: brightness(0.95); }
        .memory-card-back { background-color: var(--paper-bg); transform: rotateY(180deg); border: 2px solid var(--ink-dark); }
        
        .memory-card.matched.matched-p1 .memory-card-back { background-color: rgba(0, 119, 255, 0.15); border-color: var(--neon-blue); box-shadow: inset 0 0 15px rgba(0,119,255,0.3), 0 0 10px var(--neon-blue); animation: matchPulseP1 0.5s ease-out; }
        .memory-card.matched.matched-p2 .memory-card-back { background-color: rgba(255, 0, 234, 0.15); border-color: var(--neon-pink); box-shadow: inset 0 0 15px rgba(255,0,234,0.3), 0 0 10px var(--neon-pink); animation: matchPulseP2 0.5s ease-out; }
        
        @keyframes matchPulseP1 { 50% { transform: rotateY(180deg) scale(1.15); box-shadow: 0 0 25px var(--neon-blue); z-index: 10; } }
        @keyframes matchPulseP2 { 50% { transform: rotateY(180deg) scale(1.15); box-shadow: 0 0 25px var(--neon-pink); z-index: 10; } }
        
        .game-card.memory-card-menu h2 { color: #ffeb3b; text-shadow: 0 0 2px rgba(255, 235, 59, 0.8); }
        .mini-mem-grid { display: grid; grid-template-columns: repeat(4, 1fr); grid-template-rows: repeat(4, 1fr); width: 100%; height: 100%; gap: 2px; background: var(--paper-bg); border: 2px solid var(--ink-dark); padding: 2px; border-radius: 4px; perspective: 300px; }
        .mini-mem-cell { width: 100%; height: 100%; position: relative; transform-style: preserve-3d; }
        .wrong-1 { animation: flipWrong1 8s infinite cubic-bezier(0.175, 0.885, 0.32, 1.275); }
        .wrong-2 { animation: flipWrong2 8s infinite cubic-bezier(0.175, 0.885, 0.32, 1.275); }
        .right-1 { animation: flipRight1 8s infinite cubic-bezier(0.175, 0.885, 0.32, 1.275); }
        .right-2 { animation: flipRight2 8s infinite cubic-bezier(0.175, 0.885, 0.32, 1.275); }
        .win-bg { animation: memWinColor 8s infinite; }
        
        .mm-front, .mm-back { position: absolute; width: 100%; height: 100%; backface-visibility: hidden; border-radius: 2px; display: flex; align-items: center; justify-content: center; font-size: 0.9rem; }
        .mm-front { background: var(--mem-front-bg); border: 1px solid var(--ink-dark); background-image: repeating-linear-gradient(45deg, var(--mem-hatch) 0, var(--mem-hatch) 1px, transparent 1px, transparent 4px); }
        .mm-back { background: var(--paper-bg); transform: rotateY(180deg); }
        
        @keyframes flipWrong1 { 0%, 10% { transform: rotateY(0deg); } 15%, 45% { transform: rotateY(180deg); } 50%, 100% { transform: rotateY(0deg); } }
        @keyframes flipWrong2 { 0%, 20% { transform: rotateY(0deg); } 25%, 45% { transform: rotateY(180deg); } 50%, 100% { transform: rotateY(0deg); } }
        @keyframes flipRight1 { 0%, 50% { transform: rotateY(0deg); } 55%, 95% { transform: rotateY(180deg); } 100% { transform: rotateY(0deg); } }
        @keyframes flipRight2 { 0%, 65% { transform: rotateY(0deg); } 70%, 95% { transform: rotateY(180deg); } 100% { transform: rotateY(0deg); } }
        @keyframes memWinColor { 0%, 75% { background: var(--paper-bg); border: 1px solid var(--ink-dark); box-shadow: none; } 80%, 95% { background: rgba(0, 119, 255, 0.3); border: 1px solid var(--neon-blue); box-shadow: inset 0 0 5px rgba(0,119,255,0.5); } 100% { background: var(--paper-bg); border: 1px solid var(--ink-dark); box-shadow: none; } }

        /* --- EFFECTS --- */
        .shake { animation: shake 0.4s cubic-bezier(.36,.07,.19,.97) both; }
        @keyframes shake {
            10%, 90% { transform: translate3d(-2px, 0, 0); }
            20%, 80% { transform: translate3d(4px, 0, 0); }
            30%, 50%, 70% { transform: translate3d(-6px, 0, 0); }
            40%, 60% { transform: translate3d(6px, 0, 0); }
        }
        .pulse-danger {
            background-color: var(--neon-red) !important;
            box-shadow: 0 0 15px var(--neon-red) !important;
        }
        
        /* --- EASY & KID MODE STYLES & FIXES --- */
        [data-theme="baby"] {
            --paper-bg: #f4f1eb;
            --grid-line: #ff99cc;
            --ink-dark: #2c3e50;
            --neon-blue: #33ccff;
            --neon-pink: #ff3399;
            --neon-red: #ff3333;
            --cell-hover: #ffe6f2;
            --board-dark-cell: #d9ccff; /* Lavender for visibility */
            --mem-front-bg: #ffb3d9;
            --c4-board-bg: #ff99cc;
            --c4-cell-bg: #ffe6f2;
            --p1-miss-bg: rgba(51, 204, 255, 0.4);
            --p2-miss-bg: rgba(255, 51, 153, 0.4);
            --p1-miss-shadow: rgba(51, 204, 255, 0.6);
            --p2-miss-shadow: rgba(255, 51, 153, 0.6);
            --ship-color-p1: #33ccff;
            --ship-color-p2: #ff3399;
        }
        
        [data-theme="baby-dark"] {
            --paper-bg: #12161a;
            --grid-line: #803359; /* Faded dark pink */
            --ink-dark: #e0e6ed;
            --neon-blue: #00e6ff; 
            --neon-pink: #ff66b3; 
            --neon-red: #ff4d4d;
            --cell-hover: #4d0026;
            --board-dark-cell: #4d3366; /* Dark purple for visibility */
            --mem-front-bg: #4d0026;
            --c4-board-bg: #803359; /* Faded dark pink */
            --c4-cell-bg: #33001a;
            --p1-miss-bg: rgba(0, 230, 255, 0.4);
            --p2-miss-bg: rgba(255, 102, 179, 0.4);
            --p1-miss-shadow: rgba(0, 230, 255, 0.6);
            --p2-miss-shadow: rgba(255, 102, 179, 0.6);
            --ship-color-p1: #00e6ff;
            --ship-color-p2: #ff66b3;
        }

        /* Kid Mode Variants */
        [data-theme="kid"] {
            --paper-bg: #f4f1eb; /* Main body bg keeps white */
            --grid-line: #b3e6ff; /* Baby blue background squares */
            --ink-dark: #2c3e50; /* Keep text same */
            --neon-blue: #0099cc;
            --neon-pink: #cc0066;
            --neon-red: #cc0000;
            --cell-hover: #b3e6ff;
            --board-dark-cell: #d9ccff; /* Lavender for visibility */
            --mem-front-bg: #ff99cc;
            --c4-board-bg: #0088cc; /* Blue for C4 board */
            --c4-cell-bg: #e6f7ff;
            --p1-miss-bg: rgba(0, 153, 204, 0.4);
            --p2-miss-bg: rgba(204, 0, 102, 0.4);
            --p1-miss-shadow: rgba(0, 153, 204, 0.6);
            --p2-miss-shadow: rgba(204, 0, 102, 0.6);
            --ship-color-p1: #0099cc;
            --ship-color-p2: #cc0066;
            
            --kid-board-line: #0088cc; /* Blue game lines */
            --kid-cell-bg: #e6f7ff; /* Blue game background */
            --kid-card-bg: #ffe6f2; /* Pinkish card background */
        }

        [data-theme="kid-dark"] {
            --paper-bg: #12161a; /* Main body bg keeps dark */
            --grid-line: #004d80; /* Baby blue dark squares */
            --ink-dark: #e0e6ed;
            --neon-blue: #66e0ff; 
            --neon-pink: #ff99cc; 
            --neon-red: #ff8080;
            --cell-hover: #004d80;
            --board-dark-cell: #331a4d; /* Dark violet for visibility */
            --mem-front-bg: #cc0066;
            --c4-board-bg: #004480; /* Faded dark blue */
            --c4-cell-bg: #001a2b; /* Faded dark blue */
            --p1-miss-bg: rgba(102, 224, 255, 0.4);
            --p2-miss-bg: rgba(255, 153, 204, 0.4);
            --p1-miss-shadow: rgba(102, 224, 255, 0.6);
            --p2-miss-shadow: rgba(255, 153, 204, 0.6);
            --ship-color-p1: #66e0ff;
            --ship-color-p2: #ff99cc;

            --kid-board-line: #004480; /* Faded dark blue */
            --kid-cell-bg: #001a2b; /* Faded dark blue */
            --kid-card-bg: #33001a; /* Dark Pinkish card background */
        }

        /* Specific Overrides for Baby & Kid Mode Cards */
        [data-theme^="baby"] .game-card { background-color: #e6f7ff; border-color: var(--grid-line); }
        [data-theme="baby-dark"] .game-card { background-color: #001f33; }
        [data-theme^="baby"] .card-preview { background-color: var(--grid-line); }
        
        [data-theme^="kid"] .game-card { background-color: var(--kid-card-bg); border-color: var(--kid-board-line); }
        [data-theme^="kid"] .card-preview { background-color: var(--kid-board-line); box-shadow: inset 0 0 10px rgba(0,0,0,0.2); }
        
        /* Apply Blue lines and Blue backgrounds to all Game Boards globally in Kid Mode */
        [data-theme^="kid"] .board, [data-theme^="kid"] .cascade-board, [data-theme^="kid"] .sudoku-board, [data-theme^="kid"] .reversi-board, [data-theme^="kid"] .checkers-board, [data-theme^="kid"] .chess-board, [data-theme^="kid"] .battle-board {
            background-color: var(--kid-board-line); border-color: var(--kid-board-line);
        }
        [data-theme^="kid"] .dots-board { border-color: var(--kid-board-line); background-color: var(--kid-cell-bg); }
        [data-theme^="kid"] .memory-board { border-color: var(--kid-board-line); background-color: var(--kid-cell-bg); }
        [data-theme^="kid"] .memory-card-back { border-color: var(--kid-board-line); background-color: var(--kid-cell-bg); }
        [data-theme^="kid"] .memory-card-front { border-color: var(--kid-board-line); }

        [data-theme^="kid"] .cell, [data-theme^="kid"] .cascade-cell, [data-theme^="kid"] .sudoku-cell, [data-theme^="kid"] .reversi-cell, [data-theme^="kid"] .checkers-cell.light, [data-theme^="kid"] .chess-cell.light, [data-theme^="kid"] .battle-cell {
            background-color: var(--kid-cell-bg);
        }

        /* Update Mini Previews for Kid Mode */
        [data-theme^="baby"] .card-preview > div[class*="grid"], [data-theme^="baby"] .card-preview > .mini-casc-showcase { border-color: var(--grid-line) !important; }
        [data-theme^="baby"] .mini-sudoku-grid, [data-theme^="baby"] .mini-rev-grid, [data-theme^="baby"] .mini-chk-grid, [data-theme^="baby"] .mini-chess-grid, [data-theme^="baby"] .mini-c4-grid, [data-theme^="baby"] .mini-bat-grid, [data-theme^="baby"] .mini-casc-showcase { background-color: var(--grid-line) !important; }
        
        [data-theme^="kid"] .card-preview > div[class*="grid"], [data-theme^="kid"] .card-preview > .mini-casc-showcase { border-color: var(--kid-board-line) !important; }
        [data-theme^="kid"] .mini-sudoku-grid, [data-theme^="kid"] .mini-rev-grid, [data-theme^="kid"] .mini-chk-grid, [data-theme^="kid"] .mini-chess-grid, [data-theme^="kid"] .mini-c4-grid, [data-theme^="kid"] .mini-bat-grid, [data-theme^="kid"] .mini-casc-showcase, [data-theme^="kid"] .mini-xo-grid, [data-theme^="kid"] .mini-mem-grid {
            background-color: var(--kid-board-line) !important; border-color: var(--kid-board-line) !important;
        }
        [data-theme^="kid"] .mini-xo-cell, [data-theme^="kid"] .mc-cell, [data-theme^="kid"] .mini-sudo-cell, [data-theme^="kid"] .mini-rev-cell, [data-theme^="kid"] .mini-chk-cell.light, [data-theme^="kid"] .mini-chess-cell.light, [data-theme^="kid"] .mini-c4-cell, [data-theme^="kid"] .mini-bat-cell, [data-theme^="kid"] .mm-back {
            background-color: var(--kid-cell-bg) !important;
        }

        /* Fix Overlay Backgrounds for Dark Variant Modes */
        [data-theme="baby-dark"] .overlay:not([style]),
        [data-theme="baby-dark"] .overlay[style*="244"],
        [data-theme="kid-dark"] .overlay:not([style]),
        [data-theme="kid-dark"] .overlay[style*="244"] { background-color: rgba(51, 0, 26, 0.95) !important; }
        [data-theme="baby-dark"] .overlay[style*="180, 255, 180"],
        [data-theme="kid-dark"] .overlay[style*="180, 255, 180"] { background-color: rgba(50, 100, 70, 0.95) !important; }
        [data-theme="baby-dark"] .overlay[style*="255, 180, 180"],
        [data-theme="kid-dark"] .overlay[style*="255, 180, 180"] { background-color: rgba(110, 50, 70, 0.95) !important; }
        [data-theme="baby-dark"] .overlay[style*="255, 235, 150"],
        [data-theme="kid-dark"] .overlay[style*="255, 235, 150"] { background-color: rgba(110, 95, 40, 0.95) !important; }

        #strike-line {
            position: absolute; left: 0; top: 55%; height: 3px; width: 0; background: var(--neon-red);
            transition: width 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94); border-radius: 2px; transform: translateY(-50%);
        }
        body.easy-mode-active #strike-line { width: 100%; }

        #menu-subtitle-text {
            display: inline-block;
            transition: opacity 0.25s ease, transform 0.25s ease;
        }
        .subtitle-swap-out {
            opacity: 0;
            transform: translateY(-8px);
        }
        .subtitle-swap-in {
            opacity: 0;
            transform: translateY(8px);
        }

        /* Dynamic Title Styling & Preview Target Inheritance */
        .xo-card { --title-color: var(--neon-blue); }
        .dots-card { --title-color: var(--neon-pink); }
        .cascade-card { --title-color: #00e676; }
        .sudoku-card { --title-color: #ff9d00; }
        .reversi-card { --title-color: #a200ff; }
        .checkers-card { --title-color: #ff0055; }
        .chess-card { --title-color: #00c735; }
        .c4-card { --title-color: #ff6a00; }
        .battle-card { --title-color: #00ffaa; }
        .memory-card-menu { --title-color: #ffeb3b; }

        /* Childish Title Variants for Easy Mode */
        [data-theme^="baby"] .cascade-card { --title-color: #33ff99; }
        [data-theme^="baby"] .sudoku-card { --title-color: #ffcc00; }
        [data-theme^="baby"] .reversi-card { --title-color: #cc66ff; }
        [data-theme^="baby"] .checkers-card { --title-color: #ff6699; }
        [data-theme^="baby"] .chess-card { --title-color: #66ff66; }
        [data-theme^="baby"] .c4-card { --title-color: #ff9933; }
        [data-theme^="baby"] .battle-card { --title-color: #33ffcc; }
        [data-theme^="baby"] .memory-card-menu { --title-color: #ffff66; }

        .game-card h2 {
            color: var(--title-color) !important;
            text-shadow: 0 0 2px var(--title-color) !important;
        }

        /* Scopes the preview opponent color to match the title variable directly */
        .game-card:not(.xo-card) .card-preview {
            --neon-pink: var(--title-color);
            --neon-red: var(--title-color);
        }