* { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: system-ui, sans-serif; background: #000; overflow: hidden; height: 100vh; height: 100dvh; }
        #viewer { width: 100%; height: 100%; display: block; touch-action: none; }
        #hotspotLayer { position: absolute; inset: 0; pointer-events: none; }
        .hotspot-marker { position: absolute; transform: translate(-50%, -50%); cursor: pointer; pointer-events: auto; z-index: 30; }
        .hotspot-marker .inner { border-radius: 50%; display: flex; align-items: center; justify-content: center; transition: transform 0.2s; }
        .hotspot-marker .tooltip { position: absolute; bottom: 100%; left: 50%; transform: translateX(-50%); margin-bottom: 8px; padding: 4px 10px; white-space: nowrap; border-radius: 6px; opacity: 0; pointer-events: none; transition: opacity 0.2s; }
        .hotspot-marker:hover .inner { transform: scale(1.15); }
        .hotspot-marker:hover .tooltip { opacity: 1; }
        .hotspot-marker.playing .inner { animation: audio-pulse 1s ease-in-out infinite !important; }
        @keyframes audio-pulse { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.1); } }
        @keyframes hs-float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-5px); } }
        @keyframes hs-pulse { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.08); } }
        @keyframes hs-bounce { 0%, 100% { transform: translateY(0); } 40% { transform: translateY(-8px); } }
        .logo-overlay { position: absolute; z-index: 60; pointer-events: none; }
        
        /* Info Popup */
        .info-popup {
            position: fixed; top: 50%; left: 50%; transform: translate(-50%, -50%);
            background: rgba(22,27,34,0.98); border: 1px solid #30363d; border-radius: 16px;
            padding: 20px; max-width: 90%; max-height: 85vh; width: 450px;
            z-index: 1000; box-shadow: 0 20px 60px rgba(0,0,0,0.6);
            display: flex; flex-direction: column;
        }
        .info-popup h4 { color: white; margin: 0 0 12px; padding-right: 30px; font-size: 1rem; flex-shrink: 0; }
        .info-popup .popup-body { color: #c9d1d9; flex: 1; display: flex; flex-direction: column; justify-content: center; overflow: hidden; }
        .info-popup p { line-height: 1.6; white-space: pre-wrap; overflow-y: auto; }
        .info-popup img { max-width: 100%; max-height: 60vh; height: auto; border-radius: 8px; object-fit: contain; }
        .info-popup video { max-width: 100%; max-height: 50vh; height: auto; border-radius: 8px; }
        .info-popup iframe { width: 100%; aspect-ratio: 16/9; border: none; border-radius: 8px; max-height: 50vh; }
        .info-popup audio { width: 100%; margin-top: 10px; }
        .popup-close {
            position: absolute; top: 12px; right: 12px; background: rgba(255,255,255,0.1);
            border: none; color: #8b949e; width: 28px; height: 28px; border-radius: 50%;
            cursor: pointer; font-size: 14px; display: flex; align-items: center; justify-content: center;
            transition: all 0.2s; z-index: 10;
        }
        .popup-close:hover { background: rgba(255,255,255,0.2); color: white; }
        
        @media (max-width: 600px) {
            .info-popup { width: 95%; max-height: 80vh; padding: 15px; }
            .info-popup h4 { font-size: 0.9rem; margin-bottom: 10px; }
            .info-popup video { max-height: 40vh; }
            .info-popup iframe { max-height: 35vh; }
            .info-popup img { max-height: 50vh; }
        }
        .logo-overlay img { display: block; }
        
        /* Carousel */
        .nav-container { position: fixed; bottom: 15px; left: 50%; transform: translateX(-50%); z-index: 100; display: flex; flex-direction: column; align-items: center; gap: 8px; }
        .nav-toggle { background: rgba(0,0,0,0.6); border: none; color: white; padding: 6px 14px; border-radius: 15px; cursor: pointer; font-size: 12px; display: flex; align-items: center; gap: 5px; transition: all 0.3s; backdrop-filter: blur(5px); }
        .nav-toggle:hover { background: rgba(88,166,255,0.3); }
        .nav-toggle .arrow { transition: transform 0.3s; font-size: 10px; }
        .nav-toggle.collapsed .arrow { transform: rotate(180deg); }
        
        .scene-nav { 
            display: flex; gap: 8px; background: rgba(0,0,0,0.6); padding: 10px 15px; border-radius: 12px; backdrop-filter: blur(10px);
            max-width: 90vw; overflow-x: auto; overflow-y: hidden; scroll-behavior: smooth;
            scrollbar-width: none; -ms-overflow-style: none; transition: all 0.3s ease; cursor: grab;
        }
        .scene-nav::-webkit-scrollbar { display: none; }
        .scene-nav.grabbing { cursor: grabbing; }
        .scene-nav.hidden { max-height: 0; padding: 0 15px; opacity: 0; pointer-events: none; overflow: hidden; }
        
        .scene-btn { 
            width: 130px; height: 85px; border-radius: 8px; border: 2px solid rgba(255,255,255,0.2); 
            cursor: pointer; overflow: hidden; transition: all 0.2s; flex-shrink: 0; position: relative; background: #222;
        }
        .scene-btn:hover { border-color: #58a6ff; transform: scale(1.05); }
        .scene-btn.active { border-color: #58a6ff; box-shadow: 0 0 12px rgba(88,166,255,0.5); }
        .scene-btn img { width: 100%; height: 100%; object-fit: cover; display: block; }
        .scene-btn .scene-name { 
            position: absolute; bottom: 0; left: 0; right: 0; background: linear-gradient(transparent, rgba(0,0,0,0.85)); 
            color: white; font-size: 10px; padding: 15px 5px 4px; text-align: center; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; 
        }
        
        @media (max-width: 600px) {
            .scene-btn { width: 140px; height: 95px; }
            .scene-btn .scene-name { font-size: 11px; padding: 12px 4px 3px; }
        }
        .mobile-topbar{position:fixed;top:0;right:0;padding:10px;z-index:200;pointer-events:none}
        .mobile-btn{width:44px;height:44px;border-radius:50%;background:rgba(22,27,34,0.9);color:white;border:1px solid rgba(255,255,255,0.2);margin-left:10px;font-size:20px;display:none;align-items:center;justify-content:center;cursor:pointer;pointer-events:auto;backdrop-filter:blur(5px)}
        @media(max-width:768px){.mobile-btn{display:flex}}
        .mobile-menu-backdrop{position:fixed;inset:0;background:rgba(0,0,0,0.8);z-index:300;opacity:0;pointer-events:none;transition:opacity 0.3s;display:flex;align-items:flex-end}
        .mobile-menu-backdrop.show{opacity:1;pointer-events:auto}
        .mobile-menu{background:#161b22;width:100%;border-radius:20px 20px 0 0;padding:20px;transform:translateY(100%);transition:transform 0.3s;border-top:1px solid #30363d}
        .mobile-menu-backdrop.show .mobile-menu{transform:translateY(0)}
        .mobile-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}
        .mobile-item{background:#21262d;border:1px solid #30363d;border-radius:12px;padding:15px 5px;display:flex;flex-direction:column;align-items:center;color:white;cursor:pointer}
        .mobile-item.active{border-color:#238636;background:#1a2e22}
        .gyro-btn{position:fixed;bottom:180px;right:20px;width:44px;height:44px;border-radius:50%;background:#161b22;color:white;border:1px solid #30363d;z-index:100;font-size:20px;display:none;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 4px 12px rgba(0,0,0,0.5);transition:all 0.3s}
        .gyro-btn.active{background:#238636;border-color:#238636}
        .gyro-btn:hover{transform:scale(1.1)}
        @media (max-width:768px){.gyro-btn{display:flex}}