ip.cpp

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*/                              
#include<bits/stdc++.h>
using namespace std;
 
#define fastio ios_base::sync_with_stdio(0); cin.tie(0)
#define LL long long 
#define mod 1000000007 
#define FOR(i, j, k) for (int i=j ; i<k ; i++)
#define ROF(i, j, k) for (int i=j ; i>=k ; i--) 
#define debug(...) fprintf(stderr, __VA_ARGS__), fflush(stderr)
#define time__(d) for(long blockTime = 0; (blockTime == 0 ? (blockTime=clock()) != 0 : false); debug("%s time : %.4fs", d, (double)(clock() - blockTime) / CLOCKS_PER_SEC))

const long long INF = 1e18;
const long long MAX = 1e5+10;
int main(){
    fastio;
    int t=1; cin>>t;
    while(t--){
        LL a,b,c,d; cin>>a>>b>>c>>d;
        if(max(a,b)==b) {cout<<b<<"\n"; continue;}
        LL req = a-b;
        if(d>=c) {cout<<-1<<"\n"; continue;}
        LL ti=req/(c-d) ; if(req%(c-d)>0) ti++;
        ti=ti*c+b;
        cout<<ti<<"\n";
    }
}