* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Segoe UI', system-ui, sans-serif;
            background: linear-gradient(135deg, #0f172a, #1e293b);
            color: #e2e8f0;
            line-height: 1.6;
            min-height: 100vh;
            overflow-x: hidden;
        }
        
        .container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 2rem;
        }
        
        header {
            text-align: center;
            padding: 2rem 0;
            position: relative;
        }
        
        h1 {
            font-size: clamp(2rem, 5vw, 3.5rem);
            margin-bottom: 1rem;
            background: linear-gradient(90deg, #38bdf8, #818cf8, #c084fc);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            font-weight: 800;
            letter-spacing: -0.025em;
        }
        
        .subtitle {
            font-size: clamp(1rem, 2.5vw, 1.4rem);
            color: #94a3b8;
            max-width: 600px;
            margin: 0 auto 2rem;
        }
        
        .globe-container {
            position: relative;
            width: 100%;
            height: 65vh;
            min-height: 300px;
            margin: 2rem 0;
            border-radius: 20px;
            overflow: hidden;
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
            background: rgba(15, 23, 42, 0.7);
            border: 1px solid rgba(56, 189, 248, 0.2);
        }
        
        #earth-globe {
            width: 100%;
            height: 100%;
            display: block;
            outline: none;
        }
        
        .globe-overlay {
            position: absolute;
            bottom: 1.5rem;
            left: 1.5rem;
            background: rgba(15, 23, 42, 0.7);
            backdrop-filter: blur(10px);
            border-radius: 12px;
            padding: 1.2rem;
            border: 1px solid rgba(56, 189, 248, 0.2);
            max-width: 300px;
            z-index: 5;
        }
        
        .globe-overlay h3 {
            font-size: clamp(1.1rem, 2.5vw, 1.3rem);
            margin-bottom: 0.5rem;
            color: #38bdf8;
        }
        
        .globe-overlay p {
            font-size: clamp(0.8rem, 1.8vw, 0.95rem);
        }
        
        .controls-info {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem;
            margin-top: 1rem;
        }
        
        .control-item {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: clamp(0.7rem, 1.5vw, 0.85rem);
            color: #cbd5e1;
        }
        
        .control-icon {
            background: rgba(56, 189, 248, 0.15);
            width: 28px;
            height: 28px;
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
        }
        
        .loading-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(15, 23, 42, 0.9);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            z-index: 10;
            transition: opacity 0.5s ease;
        }
        
        .spinner {
            width: 50px;
            height: 50px;
            border: 4px solid rgba(56, 189, 248, 0.3);
            border-top: 4px solid #38bdf8;
            border-radius: 50%;
            animation: spin 1s linear infinite;
            margin-bottom: 1.5rem;
        }
        
        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
        
        .loading-text {
            font-size: clamp(1rem, 2.5vw, 1.2rem);
            color: #cbd5e1;
            text-align: center;
        }
        
        .accessibility-options {
            position: absolute;
            top: 1.5rem;
            right: 1.5rem;
            display: flex;
            gap: 0.5rem;
            z-index: 5;
        }
        
        .a11y-btn {
            background: rgba(15, 23, 42, 0.7);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(56, 189, 248, 0.2);
            color: #cbd5e1;
            border-radius: 8px;
            padding: 0.5rem 1rem;
            cursor: pointer;
            transition: all 0.2s ease;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: clamp(0.8rem, 1.8vw, 0.9rem);
        }
        
        .a11y-btn:hover {
            background: rgba(56, 189, 248, 0.15);
        }
        
        .instructions {
            text-align: center;
            max-width: 600px;
            margin: 2rem auto;
            padding: 1.5rem;
            background: rgba(15, 23, 42, 0.5);
            border-radius: 12px;
            border: 1px solid rgba(56, 189, 248, 0.2);
        }
        
        .instructions p {
            margin-bottom: 1rem;
            color: #94a3b8;
            font-size: clamp(0.9rem, 2vw, 1rem);
        }
        
        .features {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 1.5rem;
            margin: 3rem 0;
        }
        
        .feature-card {
            background: rgba(15, 23, 42, 0.5);
            border-radius: 16px;
            padding: 1.8rem;
            border: 1px solid rgba(56, 189, 248, 0.2);
            transition: transform 0.3s ease;
        }
        
        .feature-card:hover {
            transform: translateY(-5px);
            border-color: rgba(56, 189, 248, 0.4);
        }
        
        .feature-icon {
            font-size: clamp(2rem, 4vw, 2.3rem);
            margin-bottom: 1.3rem;
            color: #38bdf8;
        }
        
        .feature-card h3 {
            font-size: clamp(1.2rem, 2.5vw, 1.4rem);
            margin-bottom: 0.8rem;
            color: #e2e8f0;
        }
        
        .feature-card p {
            font-size: clamp(0.9rem, 1.8vw, 1rem);
            color: #cbd5e1;
        }
        
        footer {
            text-align: center;
            padding: 2rem 0;
            margin-top: 3rem;
            border-top: 1px solid rgba(56, 189, 248, 0.2);
            color: #94a3b8;
            font-size: clamp(0.8rem, 1.8vw, 1rem);
        }
        
        /* Mobile touch controls */
        .mobile-controls {
            position: absolute;
            bottom: 1.5rem;
            right: 1.5rem;
            display: none;
            gap: 1rem;
            z-index: 5;
        }
        
        .mobile-control-btn {
            width: 50px;
            height: 50px;
            background: rgba(15, 23, 42, 0.7);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(56, 189, 248, 0.2);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            font-size: 1.2rem;
            color: #38bdf8;
        }
        
        /* Responsive adjustments */
        @media (max-width: 1024px) {
            .globe-container {
                height: 55vh;
            }
        }
        
        @media (max-width: 768px) {
            .container {
                padding: 1.5rem;
            }
            
            .globe-container {
                height: 50vh;
                min-height: 350px;
            }
            
            .globe-overlay {
                left: 50%;
                transform: translateX(-50%);
                width: 90%;
                max-width: none;
                bottom: 1rem;
                padding: 1rem;
            }
            
            .accessibility-options {
                top: 1rem;
                right: 1rem;
                flex-direction: column;
            }
            
            .a11y-btn {
                padding: 0.4rem 0.8rem;
            }
            
            .feature-card {
                padding: 1.5rem;
            }
            
            .mobile-controls {
                display: flex;
            }
        }
        
        @media (max-width: 480px) {
            .container {
                padding: 1rem;
            }
            
            header {
                padding: 1.5rem 0;
            }
            
            .globe-container {
                height: 45vh;
                min-height: 300px;
                margin: 1.5rem 0;
            }
            
            .mobile-control-btn {
                width: 45px;
                height: 45px;
                font-size: 1.1rem;
            }
            
            .instructions {
                padding: 1.2rem;
                margin: 1.5rem auto;
            }
        }
        
        @media (max-width: 360px) {
            .globe-container {
                height: 40vh;
            }
            
            .mobile-controls {
                bottom: 1rem;
                right: 1rem;
            }
        }