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

        body {
            font-family: 'Courier New', monospace;
            min-height: 100vh;
            transition: all 0.6s ease;
            overflow-x: hidden;
            position: relative;
        }

        /* Theme Variables */
        .lofi {
            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
            color: #e8e8e8;
        }

        .bw {
            background: linear-gradient(135deg, #000000 0%, #1a1a1a 50%, #333333 100%);
            color: #ffffff;
        }

        .cyber {
            background: linear-gradient(135deg, #0a0a0a 0%, #1a0a1a 50%, #000a1a 100%);
            color: #00ffff;
        }

        /* Animated Background */
        .background-animation {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: -1;
        }

        .floating-element {
            position: absolute;
            opacity: 0.1;
            animation: float 20s infinite linear;
            font-size: 14px;
        }

        @keyframes float {
            0% { transform: translateY(100vh) rotate(0deg); }
            100% { transform: translateY(-100vh) rotate(360deg); }
        }

        /* Header */
        .header {
            text-align: center;
            padding: 2rem;
            position: relative;
        }

        .title {
            font-size: 2.5rem;
            font-weight: bold;
            text-shadow: 0 0 20px currentColor;
            margin-bottom: 1rem;
            animation: glow 2s ease-in-out infinite alternate;
        }

        @keyframes glow {
            from { text-shadow: 0 0 20px currentColor; }
            to { text-shadow: 0 0 30px currentColor, 0 0 40px currentColor; }
        }

        .subtitle {
            font-size: 1.2rem;
            opacity: 0.8;
            margin-bottom: 2rem;
        }

        /* Theme Switcher */
        .theme-switcher {
            position: fixed;
            top: 20px;
            right: 20px;
            display: flex;
            gap: 10px;
            z-index: 1000;
        }

        .theme-btn {
            padding: 10px 15px;
            border: none;
            border-radius: 25px;
            cursor: pointer;
            font-family: inherit;
            font-weight: bold;
            transition: all 0.3s ease;
            backdrop-filter: blur(10px);
            border: 2px solid transparent;
        }

        .theme-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.3);
        }

        .lofi .theme-btn {
            background: rgba(255,255,255,0.1);
            color: #e8e8e8;
        }

        .bw .theme-btn {
            background: rgba(255,255,255,0.1);
            color: #ffffff;
        }

        .cyber .theme-btn {
            background: rgba(0,255,255,0.1);
            color: #00ffff;
            border-color: #00ffff;
        }

        .theme-btn.active {
            background: currentColor;
            color: #000;
        }

        /* Game Container */
        .game-container {
            max-width: 800px;
            margin: 0 auto;
            padding: 2rem;
            background: rgba(255,255,255,0.05);
            border-radius: 20px;
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255,255,255,0.1);
            box-shadow: 0 20px 40px rgba(0,0,0,0.3);
            animation: slideIn 0.8s ease-out;
        }

        @keyframes slideIn {
            from { transform: translateY(50px); opacity: 0; }
            to { transform: translateY(0); opacity: 1; }
        }

        /* Stats */
        .stats {
            display: flex;
            justify-content: space-around;
            margin-bottom: 2rem;
            font-size: 1.1rem;
        }

        .stat {
            text-align: center;
            padding: 1rem;
            background: rgba(255,255,255,0.05);
            border-radius: 15px;
            border: 1px solid rgba(255,255,255,0.1);
        }

        /* Phrase Display */
        .phrase-container {
            text-align: center;
            margin: 3rem 0;
            padding: 2rem;
            background: rgba(0,0,0,0.3);
            border-radius: 15px;
            border: 2px solid rgba(255,255,255,0.1);
            position: relative;
            overflow: hidden;
        }

        .phrase-container::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: linear-gradient(45deg, transparent, rgba(255,255,255,0.05), transparent);
            animation: shimmer 3s infinite;
        }

        @keyframes shimmer {
            0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
            100% { transform: translateX(100%) translateY(100%) rotate(45deg); }
        }

        .phrase {
            font-size: 1.8rem;
            font-weight: bold;
            margin-bottom: 1rem;
            line-height: 1.4;
            position: relative;
            z-index: 1;
        }

        .meaning {
            font-size: 1.1rem;
            opacity: 0.8;
            font-style: italic;
            margin-bottom: 2rem;
            position: relative;
            z-index: 1;
        }

        /* Hint */
        .hint {
            background: rgba(255,255,255,0.1);
            padding: 1rem;
            border-radius: 10px;
            margin: 1rem 0;
            border-left: 4px solid currentColor;
            opacity: 0;
            transform: translateX(-20px);
            transition: all 0.3s ease;
        }

        .hint.show {
            opacity: 1;
            transform: translateX(0);
        }

        /* Input and Buttons */
        .input-container {
            display: flex;
            gap: 1rem;
            margin: 2rem 0;
            flex-wrap: wrap;
            justify-content: center;
        }

        .language-input {
            flex: 1;
            min-width: 200px;
            padding: 1rem;
            border: 2px solid rgba(255,255,255,0.2);
            border-radius: 25px;
            background: rgba(255,255,255,0.05);
            color: inherit;
            font-family: inherit;
            font-size: 1.1rem;
            outline: none;
            transition: all 0.3s ease;
        }

        .language-input:focus {
            border-color: currentColor;
            box-shadow: 0 0 20px rgba(255,255,255,0.2);
        }

        .btn {
            padding: 1rem 2rem;
            border: none;
            border-radius: 25px;
            cursor: pointer;
            font-family: inherit;
            font-size: 1rem;
            font-weight: bold;
            transition: all 0.3s ease;
            background: rgba(255,255,255,0.1);
            color: inherit;
            border: 2px solid rgba(255,255,255,0.2);
            position: relative;
            overflow: hidden;
        }

        .btn::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            width: 0;
            height: 0;
            background: rgba(255,255,255,0.2);
            border-radius: 50%;
            transition: all 0.3s ease;
            transform: translate(-50%, -50%);
        }

        .btn:hover::before {
            width: 300px;
            height: 300px;
        }

        .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.3);
        }

        .btn span {
            position: relative;
            z-index: 1;
        }

        /* Result Display */
        .result {
            text-align: center;
            padding: 1.5rem;
            border-radius: 15px;
            margin: 1rem 0;
            font-size: 1.2rem;
            font-weight: bold;
            transform: scale(0);
            transition: all 0.3s ease;
        }

        .result.show {
            transform: scale(1);
        }

        .result.correct {
            background: rgba(0,255,0,0.2);
            border: 2px solid rgba(0,255,0,0.5);
            color: #00ff00;
        }

        .result.incorrect {
            background: rgba(255,0,0,0.2);
            border: 2px solid rgba(255,0,0,0.5);
            color: #ff4444;
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .title {
                font-size: 2rem;
            }
            
            .game-container {
                margin: 1rem;
                padding: 1rem;
            }
            
            .phrase {
                font-size: 1.4rem;
            }
            
            .input-container {
                flex-direction: column;
            }
            
            .theme-switcher {
                position: static;
                justify-content: center;
                margin-bottom: 1rem;
            }
        }

        /* Cyber theme specific effects */
        .cyber .phrase-container {
            border-color: #00ffff;
            box-shadow: 0 0 20px rgba(0,255,255,0.3);
        }

        .cyber .btn:hover {
            box-shadow: 0 0 20px rgba(0,255,255,0.5);
        }

        .cyber .language-input:focus {
            box-shadow: 0 0 20px rgba(0,255,255,0.5);
        }