*{box-sizing:border-box}body{margin:0;background:#0b0b0d;color:#f5f5f5;font-family:Tahoma,Arial,sans-serif}header{text-align:center;padding:90px 20px;background:radial-gradient(circle,#29292e,#0b0b0d 70%)}header b{font-size:42px;letter-spacing:5px}header p{color:#aaa}header h1{font-size:clamp(30px,7vw,58px)}a,button{display:inline-block;background:#fff;color:#111;border:0;border-radius:12px;padding:13px 25px;text-decoration:none;font-weight:bold;cursor:pointer}main{max-width:950px;margin:auto;padding:55px 20px}h2{text-align:center;font-size:30px;margin:25px 0}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.cards article,form{background:#151519;border:1px solid #29292e;border-radius:18px;padding:22px}.cards p{color:#aaa}form{max-width:600px;margin:auto;display:grid;gap:14px}label{display:grid;gap:6px;color:#ddd}input,select{padding:13px;border-radius:10px;border:1px solid #36363d;background:#0d0d10;color:white;font-size:16px}button{font-family:inherit;font-size:16px;margin-top:5px}footer{text-align:center;padding:30px;color:#777;border-top:1px solid #222}@media(max-width:700px){.cards{grid-template-columns:1fr}}