*{box-sizing:border-box;margin:0;padding:0}body{font-family:Open Sans,sans-serif;line-height:1.6;background-color:#f5f5f5;color:#333}h1,h2,h3{margin:0;color:#333}h1{font-size:2.5rem;margin-bottom:1rem}h2{font-size:2rem;margin-bottom:1rem}h3{font-size:1.5rem;margin-bottom:.5rem}p{margin-bottom:1rem}ul{list-style-type:none}a{text-decoration:none}a:hover{color:#007bff}button{cursor:pointer}button:hover{background-color:#0056b3;color:#fff}input,textarea{width:100%;padding:1rem;border:none;border-radius:5px;background:#eaeaea;color:#333;transition:background-color .3s ease}input:focus,textarea:focus{background:#d5d5d5}button{padding:1rem 2rem;border:none;border-radius:5px;background:#007bff;color:#fff;font-weight:700;transition:background-color .3s ease}button:hover{background-color:#0056b3}@media (max-width: 768px){h1{font-size:2rem}h2{font-size:1.5rem}h3{font-size:1.25rem}button{padding:.75rem 1.5rem}}.text-center{text-align:center}.mt-2{margin-top:2rem}.mb-2{margin-bottom:2rem}