body { margin: 0; background: #f4f4f4; font-family: 'Courier New', Courier, monospace; color: #333; display: flex; justify-content: center; padding: 50px 20px; } #proteo-canvas { max-width: 600px; line-height: 1.6; } h1 { font-weight: normal; border-bottom: 1px solid #333; display: inline-block; } p { margin-bottom: 20px; transition: opacity 2s; } #silencio-btn { background: none; border: 1px solid #333; padding: 10px 20px; cursor: pointer; font-family: inherit; } #silencio-btn:hover { background: #333; color: #f4f4f4; } .desvanecer { opacity: 0.2; }