*{box-sizing:border-box;margin:0;padding:0;font-family:Arial,Helvetica,sans-serif}body{background:#f4f6f9;color:#111}.container{max-width:400px;margin:100px auto;padding:30px;background:#fff;border-radius:10px;box-shadow:0 10px 30px rgba(0,0,0,.08)}h1{margin-bottom:20px}input{margin-bottom:12px;border-radius:6px;border:1px solid #ddd;font-size:14px}button,input{width:100%;padding:10px}button{border-radius:6px;border:none;background:#000;color:#fff;cursor:pointer;font-weight:700}button:hover{background:#333}.secondary-btn{background:#e5e5e5;color:#000;margin-top:10px}