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(max-width:640px){.primary-row{flex-direction:column}.advanced-grid{grid-template-columns:1fr}.app-footer{justify-content:center;text-align:center}.gokp-code-input{font-size:1.4rem;letter-spacing:.35em;text-indent:.35em}.nav__links{display:none}.nav__toggle{display:flex}.result-field{flex-direction:column}.result-field .btn{width:100%}.about-intro{padding:20px}.about-features{grid-template-columns:1fr}.gokp-analytics-grid{grid-template-columns:1fr}.primary-row .form-control{width:100%}}