*{box-sizing:border-box}.container{padding-left:15px;padding-right:15px}body{margin:0;font-family:Poppins,sans-serif}.header-section{text-align:center}.header-section h1{font-size:2rem;font-weight:bolder;color:#023770;margin-bottom:1rem}.header-section p{font-size:1rem;color:#666;margin-bottom:2rem}.bmi-calculator{background:linear-gradient(135deg,#fff,#f8f9fa);padding:25px;border-radius:15px;box-shadow:0 8px 16px #0000001a;max-width:400rem}.bmi-calculator h2{margin-bottom:20px;text-align:center;color:#007858;font-weight:600}.intro{margin-bottom:20px;font-size:16px;color:#555;text-align:center}.form-group{margin-bottom:20px}.form-group label{display:block;margin-bottom:8px;font-weight:500;color:#333}.form-group input{width:100%;padding:12px;font-size:16px;border:1px solid #ccc;border-radius:8px;outline:none;transition:border-color .3s}.form-group input:focus{border-color:#007858}.btn{background-color:#007858;color:#fff;padding:12px 20px;border:none;border-radius:8px;cursor:pointer;width:100%;font-size:16px;font-weight:500;transition:background-color .3s}.btn:hover{background-color:#005f46}.result{margin-top:25px;text-align:center;font-size:18px;color:#333;font-weight:500}.bmi-table{background:#fff;margin:50px auto;padding:20px;border-radius:10px;box-shadow:0 4px 8px #0000001a;max-width:600px;width:100%}.bmi-table h3{margin-bottom:15px;text-align:center;color:#333;font-weight:600}.bmi-table table{width:100%;border-collapse:collapse}.bmi-table th,.bmi-table td{border:1px solid #ddd;padding:8px;text-align:center}.bmi-table th{background-color:#007858;color:#fff;font-weight:500}.health-tips{background:linear-gradient(135deg,#fff,#f8f9fa);padding:25px;border-radius:15px;box-shadow:0 8px 16px #0000001a;max-width:400rem}.health-tips h4{text-align:center;color:#007858;font-weight:600}.health-tips ul{padding-left:20px;font-size:16px}.faq{background:linear-gradient(135deg,#fff,#f8f9fa);padding:25px;border-radius:15px;box-shadow:0 8px 16px #0000001a;max-width:400rem}.faq h3{text-align:center;color:#007858;font-weight:600}.faq-item{margin-bottom:20px}.cta{margin-top:30px;text-align:center;font-size:16px;color:#333}.cta a{color:#007858;text-decoration:none;font-weight:700}.cta a:hover{text-decoration:underline}