* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            
        }
        
        .container {
            width: 100%;
            max-width: 1200px;
            background: white;
            border-radius: 20px;
            box-shadow: 0 15px 50px rgba(0, 0, 0, 0.1);
            overflow: hidden;
            position: relative;
            min-height: 500px;
        }
        
        .header {
            background: linear-gradient(90deg, #1a2980 0%, #26d0ce 100%);
            color: white;
            padding: 25px 40px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            position: relative;
        }
        
        .logo {
            font-size: 28px;
            font-weight: 700;
            display: flex;
            align-items: center;
        }
        
        .logo i {
            margin-right: 12px;
            font-size: 32px;
        }
        
        .content {
            padding: 40px;
            text-align: center;
        }
        
        h1 {
            color: #2c3e50;
            font-size: 36px;
            margin-bottom: 20px;
        }
        
        .description {
            color: #7f8c8d;
            font-size: 18px;
            max-width: 700px;
            margin: 0 auto 40px;
            line-height: 1.6;
        }
        
        .language-switcher {
            position: absolute;
            top: 30px;
            right: 30px;
            z-index: 1000;
        }
        
        .lang-btn {
            background: rgba(255, 255, 255, 0.9);
            border: none;
            border-radius: 50px;
            padding: 10px 20px;
            cursor: pointer;
            display: flex;
            align-items: center;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            transition: all 0.3s ease;
            font-size: 16px;
            font-weight: 600;
            color: #2c3e50;
        }
        
        .lang-btn:hover {
            background: white;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
            transform: translateY(-2px);
        }
        
        .flag-icon {
            width: 28px;
            height: 20px;
            object-fit: cover;
            border-radius: 2px;
            margin-right: 10px;
            border: 1px solid rgba(0, 0, 0, 0.1);
        }
        
        .lang-btn i {
            margin-left: 8px;
            font-size: 14px;
            transition: transform 0.3s ease;
        }
        
        .lang-options {
            position: absolute;
            top: 100%;
            right: 0;
            background: white;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
            min-width: 180px;
            margin-top: 15px;
            opacity: 0;
            visibility: hidden;
            transform: translateY(10px);
            transition: all 0.3s ease;
        }
        
        .lang-options.show {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        
        .lang-options a {
            display: flex;
            align-items: center;
            padding: 12px 20px;
            text-decoration: none;
            color: #2c3e50;
            transition: all 0.2s ease;
            border-bottom: 1px solid #f1f2f6;
        }
        
        .lang-options a:last-child {
            border-bottom: none;
        }
        
        .lang-options a:hover {
            background: #f8f9fa;
            padding-left: 25px;
        }
        
        .lang-options a.active {
            background: #e3f2fd;
            color: #1a73e8;
            font-weight: 600;
        }
        
        .lang-name {
            margin-left: 12px;
        }
        
        .example-text {
            background: #f8f9fa;
            border-radius: 12px;
            padding: 25px;
            max-width: 800px;
            margin: 0 auto;
            text-align: left;
            font-size: 18px;
            line-height: 1.7;
            color: #34495e;
            border-left: 4px solid #3498db;
        }
        
        .code-block {
            background: #2d3436;
            color: #dfe6e9;
            border-radius: 10px;
            padding: 20px;
            margin: 30px auto;
            max-width: 700px;
            text-align: left;
            font-family: 'Courier New', monospace;
            overflow-x: auto;
            font-size: 15px;
        }
        
        .footer {
            text-align: center;
            padding: 30px;
            color: #7f8c8d;
            background: #f8f9fa;
            margin-top: 40px;
        }