body {
  margin: 0;
  font-family: Arial, sans-serif;
}

/* overlay hitam */
.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.85);
  display: none; /* default hidden */
  justify-content: center;
  align-items: center;
  z-index: 999;
}

/* box popup */
.modal {
  position: relative;
  background: #1a0026;
  padding: 10px;
  border-radius: 15px;
  box-shadow: 0 0 25px gold;
  text-align: center;
  max-width: 400px;
  width: 90%;
}

/* gambar */
.modal img {
  width: 100%;
  border-radius: 10px;
}

/* tombol close */
.close {
  position: absolute;
  top: 5px;
  right: 10px;
  color: white;
  font-size: 22px;
  cursor: pointer;
}

/* tombol bawah */
.btn-group {
  display: flex;
  justify-content: space-between;
  margin-top: 10px;
}

.btn {
  width: 48%;
  padding: 10px;
  border: none;
  border-radius: 20px;
  font-weight: bold;
  cursor: pointer;
}

/* warna */
.masuk {
  background: purple;
  color: white;
}

.daftar {
  background: gold;
  color: black;
}