nav{text-align:center;margin:1rem 0}nav a{margin:0 1rem;color:#2980b9;text-decoration:none;font-weight:500}nav a:hover{text-decoration:underline}.title,.header{text-align:center;color:#2c3e50;margin-top:2rem;margin-bottom:2rem}.title h1,.header h1{font-size:2.5rem;font-weight:700;letter-spacing:-.1rem;margin-bottom:.5rem}.title p,.header p{font-size:1.2rem;color:#555;margin-bottom:1rem}.header h2{font-size:1.3rem;font-weight:500;color:#555;margin:.3rem 0}