@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@300;400;600&display=swap');
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'JetBrains Mono', monospace;
            min-height: 100vh;
            transition: all 0.5s cubic-bezier(0.4, 0.0, 0.2, 1);
            overflow-x: hidden;
            position: relative;
        }
        
        /* Theme Variables */
        body.lofi {
            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f1419 100%);
            color: #e8ddb5;
        }
        
        body.bw {
            background: linear-gradient(135deg, #000000 0%, #1a1a1a 50%, #333333 100%);
            color: #ffffff;
        }
        
        body.cyber {
            background: linear-gradient(135deg, #0a0a0a 0%, #1a1a2e 50%, #000011 100%);
            color: #00ffff;
        }
        
        /* Animated background particles */
        .particles {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: 1;
        }
        
        .particle {
            position: absolute;
            width: 2px;
            height: 2px;
            border-radius: 50%;
            animation: float 20s infinite linear;
        }
        
        body.lofi .particle {
            background: rgba(232, 221, 181, 0.3);
        }
        
        body.bw .particle {
            background: rgba(255, 255, 255, 0.2);
        }
        
        body.cyber .particle {
            background: rgba(0, 255, 255, 0.4);
            box-shadow: 0 0 10px rgba(0, 255, 255, 0.5);
        }
        
        @keyframes float {
            from {
                transform: translateY(100vh) rotate(0deg);
                opacity: 0;
            }
            10% {
                opacity: 1;
            }
            90% {
                opacity: 1;
            }
            to {
                transform: translateY(-10vh) rotate(360deg);
                opacity: 0;
            }
        }
        
        .container {
            max-width: 800px;
            margin: 0 auto;
            padding: 2rem;
            position: relative;
            z-index: 10;
        }
        
        .header {
            text-align: center;
            margin-bottom: 3rem;
            position: relative;
        }
        
        .title {
            font-size: 3rem;
            font-weight: 600;
            margin-bottom: 1rem;
            text-shadow: 0 0 20px currentColor;
            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;
            font-weight: 300;
        }
        
        .theme-switcher {
            display: flex;
            gap: 1rem;
            justify-content: center;
            margin: 2rem 0;
        }
        
        .theme-btn {
            padding: 0.8rem 1.5rem;
            border: 2px solid currentColor;
            background: transparent;
            color: inherit;
            font-family: inherit;
            font-weight: 600;
            cursor: pointer;
            border-radius: 8px;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }
        
        .theme-btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: currentColor;
            transition: left 0.3s ease;
            z-index: -1;
            opacity: 0.1;
        }
        
        .theme-btn:hover::before {
            left: 0;
        }
        
        .theme-btn.active {
            background: currentColor;
            color: #000;
            box-shadow: 0 0 20px currentColor;
        }
        
        body.cyber .theme-btn.active {
            color: #000011;
        }
        
        .game-area {
            background: rgba(255, 255, 255, 0.05);
            border-radius: 20px;
            padding: 3rem;
            margin: 2rem 0;
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
        }
        
        .emoji-display {
            text-align: center;
            font-size: 4rem;
            margin: 2rem 0;
            padding: 2rem;
            background: rgba(0, 0, 0, 0.2);
            border-radius: 15px;
            border: 2px solid rgba(255, 255, 255, 0.1);
            min-height: 120px;
            display: flex;
            align-items: center;
            justify-content: center;
            animation: pulse 2s ease-in-out infinite;
        }
        
        @keyframes pulse {
            0%, 100% { transform: scale(1); }
            50% { transform: scale(1.05); }
        }
        
        .input-section {
            text-align: center;
            margin: 2rem 0;
        }
        
        .guess-input {
            width: 100%;
            max-width: 400px;
            padding: 1rem 1.5rem;
            font-size: 1.2rem;
            font-family: inherit;
            background: rgba(0, 0, 0, 0.3);
            border: 2px solid rgba(255, 255, 255, 0.2);
            border-radius: 10px;
            color: inherit;
            text-align: center;
            margin-bottom: 1rem;
            transition: all 0.3s ease;
        }
        
        .guess-input:focus {
            outline: none;
            border-color: currentColor;
            box-shadow: 0 0 20px rgba(255, 255, 255, 0.1);
        }
        
        .guess-input::placeholder {
            color: rgba(255, 255, 255, 0.5);
        }
        
        .submit-btn {
            padding: 1rem 2rem;
            font-size: 1.1rem;
            font-family: inherit;
            font-weight: 600;
            background: linear-gradient(45deg, currentColor, transparent);
            border: 2px solid currentColor;
            color: inherit;
            border-radius: 10px;
            cursor: pointer;
            transition: all 0.3s ease;
            margin: 0 0.5rem;
        }
        
        .submit-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
        }
        
        .score-board {
            display: flex;
            justify-content: space-between;
            margin: 2rem 0;
            padding: 1rem;
            background: rgba(0, 0, 0, 0.2);
            border-radius: 10px;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }
        
        .score-item {
            text-align: center;
        }
        
        .score-value {
            font-size: 2rem;
            font-weight: 600;
            display: block;
        }
        
        .score-label {
            font-size: 0.9rem;
            opacity: 0.7;
        }
        
        .feedback {
            text-align: center;
            margin: 1rem 0;
            padding: 1rem;
            border-radius: 10px;
            font-weight: 600;
            transition: all 0.3s ease;
            min-height: 60px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .feedback.correct {
            background: rgba(0, 255, 0, 0.2);
            border: 2px solid rgba(0, 255, 0, 0.5);
            color: #00ff00;
        }
        
        .feedback.incorrect {
            background: rgba(255, 0, 0, 0.2);
            border: 2px solid rgba(255, 0, 0, 0.5);
            color: #ff6b6b;
        }
        
        .feedback.hint {
            background: rgba(255, 255, 0, 0.2);
            border: 2px solid rgba(255, 255, 0, 0.5);
            color: #ffeb3b;
        }
        
        @media (max-width: 768px) {
            .container {
                padding: 1rem;
            }
            
            .title {
                font-size: 2rem;
            }
            
            .game-area {
                padding: 1.5rem;
            }
            
            .emoji-display {
                font-size: 3rem;
                padding: 1rem;
            }
            
            .theme-switcher {
                flex-wrap: wrap;
                gap: 0.5rem;
            }
            
            .theme-btn {
                padding: 0.6rem 1rem;
                font-size: 0.9rem;
            }
        }