* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #085757ff 0%, #017f7e 100%);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #333;
        }
        
        .login-container {
            background: white;
            border-radius: 15px;
            box-shadow: 0 20px 40px rgba(0,0,0,0.1);
            padding: 40px;
            width: 100%;
            max-width: 400px;
            text-align: center;
        }
        
        .logo {
            width: 100px;
            height: 100px;
            margin: 0 auto 20px;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        
        .logo img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        
        .logo-fallback {
            width: 100px;
            height: 100px;
            margin: 0 auto 20px;
            background: linear-gradient(135deg, #667eea, #764ba2);
            border-radius: 15px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 24px;
            font-weight: bold;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        
        h1 {
            color: #2c3e50;
            margin-bottom: 10px;
            font-size: 24px;
        }
        
        .subtitle {
            color: #7f8c8d;
            margin-bottom: 30px;
            font-size: 14px;
        }
        
        .form-group {
            margin-bottom: 20px;
            text-align: left;
        }
        
        label {
            display: block;
            margin-bottom: 5px;
            color: #2c3e50;
            font-weight: 500;
        }
        
        input[type="text"],
        input[type="password"] {
            width: 100%;
            padding: 12px 15px;
            border: 2px solid #e1e8ed;
            border-radius: 8px;
            font-size: 16px;
            transition: border-color 0.3s ease;
        }
        
        input[type="text"]:focus,
        input[type="password"]:focus {
            outline: none;
            border-color: #667eea;
        }
        
        .btn {
            width: 100%;
            background: linear-gradient(135deg, #45acacff, #017f7e);
            color: white;
            padding: 12px;
            border: none;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 500;
            cursor: pointer;
            transition: transform 0.3s ease;
        }
        
        .btn:hover:not(:disabled) {
            transform: translateY(-2px);
        }
        
        .btn:disabled {
            background: #bdc3c7;
            cursor: not-allowed;
        }
        
        .error {
            background: #fee;
            border: 1px solid #f5c6cb;
            color: #721c24;
            padding: 12px;
            border-radius: 8px;
            margin-bottom: 20px;
            font-size: 14px;
        }
        
        .version-info {
            margin-top: 30px;
            padding-top: 20px;
            border-top: 1px solid #e1e8ed;
            color: #7f8c8d;
            font-size: 12px;
        }
        
        .security-info {
            margin-top: 15px;
            color: #7f8c8d;
            font-size: 11px;
            line-height: 1.4;
        }
        
        .blocked-message {
            color: #e74c3c;
            font-weight: bold;
        }