* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            background: #0a0a0a;
            color: #e4e4e4;
            line-height: 1.6;
        }
        
        .hero {
            background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
            padding: 80px 20px;
            text-align: center;
            border-bottom: 1px solid #f7df1e;
        }
        
        .hero h1 {
            font-size: 4em;
            color: #f7df1e;
            margin-bottom: 20px;
            font-weight: 700;
            letter-spacing: -2px;
        }
        
        .hero p {
            font-size: 1.4em;
            color: #b4b4b4;
            max-width: 600px;
            margin: 0 auto;
        }
        
        .js-logo {
            width: 120px;
            height: 120px;
            margin: 0 auto 30px;
        }
        
        .js-logo img {
            width: 100%;
            height: 100%;
        }
        
        .tech-logos {
            display: flex;
            justify-content: center;
            gap: 40px;
            flex-wrap: wrap;
            margin: 60px 0;
            padding: 40px;
            background: #1a1a1a;
            border-radius: 12px;
            border: 1px solid #333;
        }
        
        .logo-item {
            text-align: center;
            transition: transform 0.3s ease;
        }
        
        .logo-item:hover {
            transform: translateY(-10px);
        }
        
        .logo-box {
            width: 80px;
            height: 80px;
            margin: 0 auto 10px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .logo-box img {
            width: 100%;
            height: 100%;
            object-fit: contain;
        }
        
        .logo-name {
            color: #b4b4b4;
            font-size: 0.9em;
            font-weight: 500;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 60px 20px;
        }
        
        .intro {
            background: #1a1a1a;
            padding: 50px;
            border-radius: 12px;
            margin-bottom: 60px;
            border: 1px solid #333;
        }
        
        .intro h2 {
            font-size: 2.5em;
            color: #f7df1e;
            margin-bottom: 25px;
        }
        
        .intro p {
            font-size: 1.2em;
            color: #c4c4c4;
            line-height: 1.8;
        }
        
        .features {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
            margin-bottom: 60px;
        }
        
        .feature-card {
            background: #1a1a1a;
            padding: 35px;
            border-radius: 12px;
            border: 1px solid #333;
            transition: all 0.3s ease;
        }
        
        .feature-card:hover {
            border-color: #f7df1e;
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(247, 223, 30, 0.1);
        }
        
        .feature-card h3 {
            color: #f7df1e;
            font-size: 1.5em;
            margin-bottom: 15px;
        }
        
        .feature-card p {
            color: #b4b4b4;
            font-size: 1.05em;
        }
        
        .demos {
            margin-top: 80px;
        }
        
        .section-title {
            font-size: 2.8em;
            color: #f7df1e;
            margin-bottom: 50px;
            text-align: center;
        }
        
        .demo-container {
            background: #1a1a1a;
            padding: 40px;
            border-radius: 12px;
            margin-bottom: 40px;
            border: 1px solid #333;
        }
        
        .demo-container h3 {
            color: #fff;
            font-size: 1.8em;
            margin-bottom: 10px;
        }
        
        .demo-container .description {
            color: #888;
            margin-bottom: 25px;
            font-size: 1.05em;
        }
        
        .controls {
            margin: 20px 0;
        }
        
        button {
            background: #f7df1e;
            color: #0a0a0a;
            border: none;
            padding: 12px 28px;
            font-size: 1em;
            font-weight: 600;
            cursor: pointer;
            border-radius: 6px;
            margin: 8px 8px 8px 0;
            transition: all 0.2s ease;
        }
        
        button:hover {
            background: #fff;
            transform: scale(1.05);
        }
        
        button:active {
            transform: scale(0.98);
        }
        
        .result {
            background: #0d0d0d;
            color: #f7df1e;
            padding: 25px;
            margin-top: 20px;
            border-radius: 8px;
            font-family: 'Courier New', monospace;
            font-size: 1.05em;
            border: 1px solid #2a2a2a;
            min-height: 60px;
            line-height: 1.6;
        }
        
        input[type="text"] {
            background: #0d0d0d;
            border: 1px solid #333;
            color: #fff;
            padding: 12px 16px;
            font-size: 1em;
            border-radius: 6px;
            width: 100%;
            max-width: 500px;
            margin-bottom: 15px;
        }
        
        input[type="text"]:focus {
            outline: none;
            border-color: #f7df1e;
        }
        
        .display-number {
            font-size: 4em;
            color: #f7df1e;
            text-align: center;
            margin: 30px 0;
            font-weight: 700;
        }
        
        .benefits {
            background: #1a1a1a;
            padding: 50px;
            border-radius: 12px;
            margin-top: 80px;
            border: 1px solid #333;
        }
        
        .benefits h2 {
            font-size: 2.5em;
            color: #f7df1e;
            margin-bottom: 30px;
        }
        
        .benefits ul {
            list-style: none;
        }
        
        .benefits li {
            padding: 15px 0;
            font-size: 1.15em;
            color: #c4c4c4;
            border-bottom: 1px solid #2a2a2a;
        }
        
        .benefits li:last-child {
            border-bottom: none;
        }
        
        .benefits li:before {
            content: "→";
            color: #f7df1e;
            font-weight: bold;
            margin-right: 15px;
        }
        
        footer {
            text-align: center;
            padding: 60px 20px;
            color: #666;
            font-size: 0.95em;
        }