*{box-sizing:border-box;font-family:Arial;margin:0;padding:0}
body{background:#fff;color:#333}

/* buttons */
.btn{padding:10px 18px;border:none;border-radius:8px;cursor:pointer;font-weight:bold}
.btn-red{background:#e53935;color:#fff}
.btn-light-red{background:#ffcccc;color:#333}

/* LOGIN */
#authPage{
  max-width:360px;
  margin:80px auto;
  padding:25px;
  border:1px solid #eee;
  border-radius:16px;
  text-align:center;
}
#authPage input{
  width:100%;
  padding:10px;
  margin:8px 0;
  border-radius:8px;
  border:1px solid #ccc;
}

/* DASHBOARD */
#dashboard{display:none}
header{
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:15px 25px;
  border-bottom:1px solid #eee;
}
.balance{font-weight:bold;color:#e53935}
.container{max-width:1100px;margin:30px auto;padding:0 20px}
.plans{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px}
.plan{border:1px solid #eee;border-radius:16px;padding:20px;text-align:center}
.plan h3{color:#e53935}

/* MODAL */
.modal{
  position:fixed;
  inset:0;
  background:rgba(0,0,0,.4);
  display:none;
  justify-content:center;
  align-items:center;
}
.modal-box{
  background:#fff;
  width:90%;
  max-width:380px;
  border-radius:20px;
  padding:25px;
  text-align:center;
}
.modal-box input, select{width:100%;padding:10px;margin:8px 0;}