:root {
            --bg-dark: #050510;
            --neon-green: #39ff14;
            --neon-red: #ff073a;
            --neon-gold: #ffd700;
            --neon-blue: #00f3ff;
        }

        * { box-sizing: border-box; user-select: none; -webkit-tap-highlight-color: transparent; }
        
        body {
            margin: 0; overflow: hidden; background-color: var(--bg-dark);
            font-family: 'Roboto', sans-serif; color: #fff;
            height: 100vh; width: 100vw; display: flex; flex-direction: column;
        }

        /* --- UI LAYER --- */
        #game-container { position: relative; flex: 1; background: #000; overflow: hidden; cursor: grab; }
        #game-container:active { cursor: grabbing; }

        .header {
            position: absolute; top: 0; left: 0; right: 0; padding: 20px;
            background: linear-gradient(180deg, rgba(0,0,0,0.8) 0%, transparent 100%);
            display: flex; justify-content: space-between; align-items: center; z-index: 10;
            pointer-events: none;
        }
        /* Reduced Logo Size for Header */
        .logo { font-family: 'Orbitron'; font-weight: 900; font-size: 1.2rem; color: #fff; text-shadow: 0 0 10px var(--neon-blue); pointer-events: auto;}
        .logo span { color: var(--neon-green); }
        
        .score-board {
            background: rgba(0,0,0,0.6); padding: 8px 20px; border-radius: 30px; 
            border: 2px solid var(--neon-gold); font-size: 1.5rem; font-weight: bold; color: var(--neon-gold);
            font-family: 'Orbitron'; text-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
        }

        /* --- MODERN START SCREEN (UPDATED GAMING LOOK) --- */
        #start-screen {
            position: absolute; top: 0; left: 0; width: 100%; height: 100%;
            background: linear-gradient(135deg, rgba(5,5,16,0.9), rgba(5,5,16,0.8)), 
                        url('https://images.unsplash.com/photo-1579952363873-27f3bade9f55?q=80&w=1920&auto=format&fit=crop');
            background-size: cover;
            background-position: center;
            display: flex; flex-direction: column; align-items: center; justify-content: center;
            z-index: 100;
        }
        
        .menu-box {
            width: 90%; max-width: 450px;
            display: flex; flex-direction: column; gap: 20px;
            text-align: center;
            padding: 40px;
            /* HUD / Panel Look */
            background: rgba(10, 15, 30, 0.95);
            border: 1px solid rgba(0, 243, 255, 0.3);
            box-shadow: 0 0 50px rgba(0, 0, 0, 0.8), inset 0 0 20px rgba(0, 243, 255, 0.05);
            position: relative;
            /* Cut corners (Sci-fi shape) */
            clip-path: polygon(
                20px 0, 100% 0, 
                100% calc(100% - 20px), calc(100% - 20px) 100%, 
                0 100%, 0 20px
            ); 
            animation: fadeIn 0.8s ease-out;
        }

        /* Decorative Line */
        .menu-box::before {
            content: ''; position: absolute; top: 0; left: 20px; right: 20px; height: 2px;
            background: linear-gradient(90deg, transparent, var(--neon-blue), transparent);
        }

        @keyframes fadeIn { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

        .logo-large {
            font-family: 'Orbitron'; font-weight: 900; font-size: 2.5rem; 
            color: #fff; text-shadow: 0 0 20px var(--neon-blue); margin-bottom: 10px;
            font-style: italic;
        }
        .logo-large span { color: var(--neon-green); }

        .input-group { display: flex; flex-direction: column; gap: 15px; margin-bottom: 10px; }
        
        /* High Tech Input */
        #username {
            padding: 15px; 
            background: rgba(0, 0, 0, 0.6); 
            border: 2px solid #333;
            border-left: 5px solid #333;
            color: #fff; font-family: 'Orbitron'; text-align: center;
            font-size: 1.4rem; transition: 0.3s;
            text-transform: uppercase; letter-spacing: 2px;
            width: 100%;
        }
        #username:focus { 
            border-color: var(--neon-blue); 
            border-left-color: var(--neon-blue);
            box-shadow: 0 0 15px rgba(0, 243, 255, 0.2); 
            outline: none; 
        }
        #username::placeholder { color: #555; font-size: 1rem; }

        /* --- GAMING BUTTONS 2.0 --- */
        .btn {
            position: relative;
            width: 100%;
            padding: 20px;
            border: none;
            background: transparent;
            font-family: 'Orbitron', sans-serif;
            font-weight: 900;
            font-size: 1.4rem;
            letter-spacing: 2px;
            text-transform: uppercase;
            cursor: pointer;
            transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            display: flex; justify-content: center; align-items: center; gap: 10px;
            margin: 8px 0;
            
            /* Sci-Fi Button Shape */
            clip-path: polygon(
                15px 0, 100% 0, 
                100% calc(100% - 15px), calc(100% - 15px) 100%, 
                0 100%, 0 15px
            );
            
            /* Base Style */
            background: linear-gradient(90deg, #1a1a1a, #2a2a2a);
            color: #fff;
            border-left: 5px solid #555; /* Status bar indicator */
        }
        
        .btn span { display: inline-block; } /* Reset skew */

        .btn:hover {
            transform: translateX(5px) scale(1.02); /* Slight movement on hover */
            filter: brightness(1.2);
        }
        .btn:active { transform: scale(0.98); }
        .btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

        /* Save Button (Integrated styling) */
        .btn-save {
            font-size: 1rem; padding: 12px;
            background: #111; color: #888;
            border-left-color: #444;
        }
        .btn-save:hover { background: #222; color: #fff; border-left-color: #fff; }
        .btn-save.saved { 
            background: rgba(57, 255, 20, 0.1); 
            color: var(--neon-green); 
            border-left-color: var(--neon-green);
        }

        /* Start Game - HERO BUTTON */
        .btn-start {
            background: linear-gradient(90deg, #004d00, #00b300);
            color: #fff;
            border-left: 5px solid var(--neon-green);
            text-shadow: 0 2px 4px rgba(0,0,0,0.5);
            font-size: 1.6rem;
            margin-top: 15px;
        }
        .btn-start:hover {
            background: linear-gradient(90deg, #006600, var(--neon-green));
            box-shadow: 0 0 30px rgba(57, 255, 20, 0.4);
        }

        /* Leaderboard - GOLD THEME */
        .btn-lb {
            background: linear-gradient(90deg, #332200, #b8860b);
            color: #fff;
            border-left: 5px solid var(--neon-gold);
            font-size: 1.1rem;
        }
        .btn-lb:hover {
            background: linear-gradient(90deg, #553300, var(--neon-gold));
            box-shadow: 0 0 30px rgba(255, 215, 0, 0.3);
        }
        
        #lb-popup {
            position: absolute; top: 0; left: 0; width: 100%; height: 100%;
            background: rgba(0,0,0,0.9); z-index: 150;
            display: none; align-items: center; justify-content: center;
            backdrop-filter: blur(5px);
        }
        .popup-content {
            background: #111; border: 2px solid var(--neon-gold);
            padding: 25px; border-radius: 10px; width: 90%; max-width: 400px;
            box-shadow: 0 0 50px rgba(255, 215, 0, 0.15);
            text-align: center;
            display: flex; flex-direction: column;
            max-height: 80vh;
        }
        .lb-list { 
            margin: 20px 0; overflow-y: auto; text-align: left; flex: 1;
            background: rgba(255,255,255,0.03); padding: 10px; border-radius: 5px;
        }
        .lb-item { display: flex; justify-content: space-between; padding: 12px; border-bottom: 1px solid #222; font-family: 'Roboto'; }
        .lb-item:nth-child(1) { color: var(--neon-gold); font-weight: 900; }
        
        .lb-list::-webkit-scrollbar { width: 4px; }
        .lb-list::-webkit-scrollbar-track { background: #000; }
        .lb-list::-webkit-scrollbar-thumb { background: var(--neon-blue); }

        #game-over-overlay {
            position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
            display: none; flex-direction: column; align-items: center; gap: 15px;
            z-index: 50; width: 100%;
        }
        .oops-msg {
            font-family: 'Orbitron'; font-size: 3rem; color: var(--neon-red); font-style: italic;
            text-shadow: 0 0 20px #000; margin-bottom: 10px; text-align: center;
            animation: shake 0.5s;
        }
        @keyframes shake { 0%, 100% {transform: translateX(0);} 25% {transform: translateX(-10px);} 75% {transform: translateX(10px);} }

        .btn-restart { background: var(--neon-gold); color: #000; width: 220px; box-shadow: 0 0 20px rgba(255, 215, 0, 0.4); }
        .btn-menu { background: #222; color: #fff; border: 1px solid #fff; width: 220px; }
        .btn-menu:hover { background: #fff; color: #000; }

        /* --- FLOATING CONTROLS --- */
        .controls-overlay {
            position: absolute; bottom: 0; left: 0; right: 0;
            height: 100%; pointer-events: none; z-index: 20;
        }

        /* Hint Text */
        #hint {
            position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%);
            color: rgba(255,255,255,0.8); font-family: 'Orbitron'; font-size: 1rem;
            animation: pulse 1.5s infinite; text-shadow: 0 2px 4px #000; letter-spacing: 1px;
            pointer-events: none;
        }
        @keyframes pulse { 0%{opacity:0.6;} 50%{opacity:1;} 100%{opacity:0.6;} }

        /* Floating Button Container */
        .fab-container {
            position: absolute; bottom: 30px; right: 20px;
            display: flex; flex-direction: column-reverse; align-items: flex-end; gap: 10px;
            pointer-events: auto;
        }

        /* Main FAB */
        .fab-main {
            width: 60px; height: 60px;
            background: var(--neon-blue); border: none; border-radius: 50%;
            color: #000; font-size: 1.5rem;
            box-shadow: 0 0 20px rgba(0, 243, 255, 0.4);
            cursor: pointer; display: flex; align-items: center; justify-content: center;
            transition: transform 0.2s;
        }
        .fab-main:active { transform: scale(0.9); }
        .fab-main i { transition: transform 0.3s; }
        .fab-main.active i { transform: rotate(45deg); }

        /* Options Menu */
        .fab-options {
            display: flex; flex-direction: column; gap: 8px;
            opacity: 0; transform: translateY(20px) scale(0.8);
            pointer-events: none; transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
        }
        .fab-options.show {
            opacity: 1; transform: translateY(0) scale(1);
            pointer-events: auto;
        }

        .fab-opt-btn {
            background: rgba(0,0,0,0.8); border: 1px solid var(--neon-blue);
            color: #fff; padding: 10px 15px; border-radius: 8px;
            font-family: 'Orbitron'; font-size: 0.8rem; cursor: pointer;
            text-align: right; min-width: 100px;
            transition: 0.2s;
        }
        .fab-opt-btn:hover { background: var(--neon-blue); color: #000; }
        .fab-opt-btn.active { background: var(--neon-blue); color: #000; font-weight: bold; box-shadow: 0 0 10px var(--neon-blue); }

        /* FX Text */
        .fx-text {
            position: absolute; font-family: 'Orbitron'; font-weight: 900; font-size: 4rem;
            color: #fff; font-style: italic;
            text-shadow: 4px 4px 0 #000;
            pointer-events: none;
            z-index: 40; width: 100%; text-align: center;
            top: 35%;
            animation: popStay 3s forwards; 
        }
        @keyframes popStay { 
            0% { transform: translateY(0) scale(0) skewX(-10deg); opacity: 0; }
            10% { transform: translateY(0) scale(1.2) skewX(-10deg); opacity: 1; }
            20% { transform: translateY(0) scale(1.0) skewX(-10deg); opacity: 1; }
            80% { transform: translateY(0) scale(1.0) skewX(-10deg); opacity: 1; }
            100% { transform: translateY(-50px) scale(1.2) skewX(-10deg); opacity: 0; }
        }

        #taunt-bubble {
            position: absolute; background: #fff; color: #000;
            padding: 10px 15px; border-radius: 20px; border-bottom-left-radius: 2px;
            font-weight: 900; font-size: 0.9rem; text-transform: uppercase;
            pointer-events: none; opacity: 0; transition: opacity 0.3s, transform 0.1s linear;
            z-index: 35; white-space: nowrap; box-shadow: 0 4px 15px rgba(0,0,0,0.5); border: 2px solid #000;
        }