.left-column{display:flex;gap:30px}.box-nav{flex:1;background:#f3f2f2;padding:20px;border-radius:20px}.main-box{flex:3}.active-nav{text-decoration-line:underline}.not-active-nav{text-decoration-line:unset}body{height:100vh;display:flex;flex-direction:column}@keyframes flash{0%{background-color:red}50%{background-color:#0f0}to{background-color:red}}.flashing{animation:flash 1s infinite;border-radius:5px;text-align:center}.landing-page{font-family:Helvetica Neue,sans-serif}.hero{display:flex;justify-content:space-between;padding:2rem;background-color:#f8f9fa}.hero-content h1{font-size:2.5rem}.hero-content p{margin-top:1rem;font-size:1.25rem}.cta-button{display:inline-block;margin-top:2rem;padding:1rem 2rem;background-color:#007aff;color:#fff;text-decoration:none;border-radius:5px}.feature-cards{display:grid;grid-template-columns:repeat(2,1fr);gap:1.5rem;padding:2rem}.feature-card{background-color:#fff;border:1px solid #e9ecef;border-radius:8px;padding:1.5rem;text-align:center}.real-time,.ai-protection{padding:2rem;text-align:center}.testimonials{background-color:#f1f3f5;padding:2rem}.testimonials blockquote{font-size:1.25rem;margin:1.5rem 0;border-left:4px solid #007aff;padding-left:1rem}.pricing{padding:2rem;text-align:center}.pricing-plan{border:1px solid #e9ecef;border-radius:8px;padding:1.5rem;margin:1rem;display:inline-block}.cta-footer{text-align:center;padding:2rem;background-color:#f8f9fa}.no-select{-webkit-user-select:none;-moz-user-select:none;user-select:none}