body{
  margin:0;
  font-family:Arial;
  background:#0f172a;
  color:white;
}

.hidden{
  display:none;
}

.auth-container{
  height:100vh;
  display:flex;
  justify-content:center;
  align-items:center;
}

.auth-box{
  background:#1e293b;
  padding:30px;
  border-radius:16px;
  width:320px;
}

input,button{
  width:100%;
  padding:12px;
  margin-top:10px;
  border:none;
  border-radius:10px;
}

button{
  background:#10b981;
  color:white;
  cursor:pointer;
}

header{
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:20px;
  background:#111827;
}

.grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
  gap:20px;
  padding:20px;
}

.card{
  background:#1e293b;
  padding:20px;
  border-radius:16px;
}

.full{
  margin:20px;
}

#balance{
  font-size:32px;
  font-weight:bold;
}

.item{
  border-bottom:1px solid rgba(255,255,255,.1);
  padding:10px 0;
}

.income{
  color:#10b981;
}

.expense{
  color:#ef4444;
}