*{box-sizing:border-box}body{margin:0;font-family:Arial,sans-serif;background:#090b18;color:#fff;min-height:100vh}header{padding:22px 6%;background:#10152a;border-bottom:1px solid #252b4a}header a{color:#aab7ff;text-decoration:none;font-weight:700}main{max-width:900px;margin:60px auto;padding:20px}.tool-card{background:linear-gradient(145deg,#151b35,#0e1225);border:1px solid #293158;border-radius:22px;padding:45px;text-align:center;box-shadow:0 15px 50px #0006}.icon{font-size:52px;margin-bottom:15px}h1{font-size:38px;margin:10px 0 18px}p{font-size:18px;color:#b9c1df;line-height:1.6}.tool-placeholder{margin:35px 0;padding:25px;border-radius:14px;background:#0a0e1d;color:#9ea8cc}.back{display:inline-block;color:#aab7ff;text-decoration:none;font-weight:700}