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

        body {
            font-family: 'Arial', sans-serif;
            background: linear-gradient(to bottom, #87CEEB 0%, #E0F6FF 100%);
            min-height: 100vh;
            overflow-x: hidden;
        }

        .cloud {
            position: absolute;
            background: white;
            border-radius: 100px;
            opacity: 0.7;
            animation: float 20s infinite ease-in-out;
        }

        .cloud:before, .cloud:after {
            content: '';
            position: absolute;
            background: white;
            border-radius: 100px;
        }

        .cloud1 { top: 10%; left: 10%; width: 100px; height: 40px; animation-delay: 0s; }
        .cloud1:before { width: 50px; height: 50px; top: -25px; left: 10px; }
        .cloud1:after { width: 60px; height: 40px; top: -15px; right: 10px; }

        .cloud2 { top: 25%; right: 15%; width: 120px; height: 45px; animation-delay: -5s; }
        .cloud2:before { width: 60px; height: 55px; top: -28px; left: 15px; }
        .cloud2:after { width: 70px; height: 45px; top: -18px; right: 15px; }

        .cloud3 { top: 40%; left: 20%; width: 90px; height: 35px; animation-delay: -10s; }
        .cloud3:before { width: 45px; height: 45px; top: -22px; left: 8px; }
        .cloud3:after { width: 55px; height: 35px; top: -12px; right: 8px; }

        @keyframes float {
            0%, 100% { transform: translateX(0) translateY(0); }
            50% { transform: translateX(30px) translateY(-10px); }
        }

        .container {
            max-width: 900px;
            margin: 0 auto;
            padding: 20px;
            position: relative;
            z-index: 10;
        }

        .header {
            text-align: center;
            margin-bottom: 20px;
            background: rgba(255, 255, 255, 0.9);
            padding: 20px;
            border-radius: 15px;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
        }

        .header h1 {
            color: #2c3e50;
            font-size: 2.5em;
            margin-bottom: 10px;
        }

        .progress-info {
            display: flex;
            justify-content: space-around;
            font-size: 1.2em;
            color: #34495e;
            margin-top: 15px;
        }

        .progress-item {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .game-area {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-bottom: 20px;
        }

        .question-panel {
            background: rgba(255, 255, 255, 0.95);
            padding: 30px;
            border-radius: 15px;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
        }

        .question {
            font-size: 3em;
            text-align: center;
            color: #2c3e50;
            margin-bottom: 30px;
            font-weight: bold;
        }

        .answers {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .answer-btn {
            font-size: 2em;
            padding: 20px;
            border: none;
            border-radius: 15px;
            cursor: pointer;
            transition: all 0.3s;
            font-weight: bold;
            color: white;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
        }

        .answer-btn:hover {
            transform: translateY(-5px);
            box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
        }

        .answer-btn:active {
            transform: translateY(0);
        }

        .answer-btn.option1 { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); }
        .answer-btn.option2 { background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%); }
        .answer-btn.option3 { background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%); }

        .answer-btn.shake {
            animation: shake 0.5s;
        }

        @keyframes shake {
            0%, 100% { transform: translateX(0); }
            25% { transform: translateX(-10px); }
            75% { transform: translateX(10px); }
        }

        .building-panel {
            background: rgba(255, 255, 255, 0.95);
            padding: 20px;
            border-radius: 15px;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
            display: flex;
            flex-direction: column;
            align-items: center;
        }

        .building-container {
            width: 100%;
            height: 500px;
            position: relative;
            display: flex;
            flex-direction: column-reverse;
            align-items: center;
            overflow: hidden;
        }

        .floor {
            width: 200px;
            height: 45px;
            position: relative;
            margin-top: 2px;
            animation: buildFloor 0.5s ease-out;
        }

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

        .floor.golden {
            animation: buildFloorGolden 0.8s ease-out;
        }

        @keyframes buildFloorGolden {
            0% {
                transform: translateY(50px) scale(0.8);
                opacity: 0;
            }
            50% {
                transform: translateY(0) scale(1.1);
            }
            100% {
                transform: translateY(0) scale(1);
                opacity: 1;
            }
        }

        .floor-body {
            width: 100%;
            height: 100%;
            background: linear-gradient(to right, #34495e, #2c3e50);
            border: 3px solid #1a252f;
            border-radius: 3px;
            position: relative;
            display: flex;
            justify-content: space-around;
            align-items: center;
            padding: 0 10px;
        }

        .floor.golden .floor-body {
            background: linear-gradient(to right, #f39c12, #f1c40f);
            border-color: #d68910;
            box-shadow: 0 0 20px rgba(241, 196, 15, 0.6);
        }

        .window {
            width: 15px;
            height: 20px;
            background: #f1c40f;
            border: 1px solid #f39c12;
            animation: lightUp 0.3s ease-in;
        }

        @keyframes lightUp {
            from { opacity: 0; }
            to { opacity: 1; }
        }

        .bonus-element {
            position: absolute;
            animation: appear 0.5s ease-out;
        }

        @keyframes appear {
            from {
                transform: scale(0);
                opacity: 0;
            }
            to {
                transform: scale(1);
                opacity: 1;
            }
        }

        .antenna {
            width: 6px;
            height: 40px;
            background: #e74c3c;
            position: absolute;
            top: -40px;
            left: 50%;
            transform: translateX(-50%);
        }

        .antenna::after {
            content: '';
            width: 20px;
            height: 20px;
            background: #e74c3c;
            border-radius: 50%;
            position: absolute;
            top: -10px;
            left: 50%;
            transform: translateX(-50%);
        }

        .helipad {
            width: 60px;
            height: 5px;
            background: #3498db;
            position: absolute;
            top: -5px;
            left: 50%;
            transform: translateX(-50%);
        }

        .helipad::before {
            content: 'H';
            color: white;
            font-weight: bold;
            font-size: 20px;
            position: absolute;
            top: -20px;
            left: 50%;
            transform: translateX(-50%);
        }

        .end-screen {
            display: none;
            text-align: center;
            background: rgba(255, 255, 255, 0.95);
            padding: 40px;
            border-radius: 15px;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
        }

        .end-screen.show {
            display: block;
        }

        .end-screen h2 {
            font-size: 2.5em;
            color: #27ae60;
            margin-bottom: 20px;
        }

        .stats {
            font-size: 1.5em;
            color: #34495e;
            margin: 20px 0;
        }

        .fireworks {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: 1000;
        }

        .firework {
            position: absolute;
            width: 4px;
            height: 4px;
            border-radius: 50%;
            animation: explode 1s ease-out forwards;
        }

        @keyframes explode {
            0% {
                transform: translate(0, 0);
                opacity: 1;
            }
            100% {
                transform: translate(var(--x), var(--y));
                opacity: 0;
            }
        }

        .btn-restart {
            font-size: 1.5em;
            padding: 15px 40px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border: none;
            border-radius: 10px;
            cursor: pointer;
            margin-top: 20px;
            transition: transform 0.3s;
        }

        .btn-restart:hover {
            transform: scale(1.05);
        }

        @media (max-width: 768px) {
            .game-area {
                grid-template-columns: 1fr;
            }

            .building-container {
                height: 400px;
            }

            .floor {
                width: 150px;
                height: 35px;
            }

            .window {
                width: 12px;
                height: 15px;
            }
        }