@media (max-width: 680px) .hero h1 font-size: 2rem;
.option-btn:hover background: #e6edf4; border-color: #2c7da0; geometrylessons.github
.feedback margin-top: 0.6rem; font-size: 0.9rem; padding: 0.3rem 0; color: #2c5a6e; @media (max-width: 680px)
hr margin: 2rem 0 1rem; border: none; height: 2px; background: linear-gradient(to right, #c0dbec, transparent); .option-btn:hover background: #e6edf4