*{
  margin: 0;
  padding: 0;
}

body{
  color: white;
  background: #0a192f; /* dark blue background */
}

.judul{
  background: #112240; /* header dark blue */
  padding: 15px;
  text-align: center;
}

.con {
  background: #172a45; /* card dark blue */
  width: 90%;
  margin: 20px auto;
  border-radius: 15px;
  padding: 15px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.4);
  font-size: 13px;
  position: relative;
}

.jam {
  position: absolute;
  bottom: 8px;
  right: 12px;
  font-size: 10px;
  color: #8892b0; /* abu kebiruan */
}

button {
  background: linear-gradient(135deg, #1e90ff, #0066ff); /* biru cerah */
  color: white;
  border: none;
  padding: 10px 18px;
  border-radius: 10px;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.3s ease;
}

/* hover */
button:hover {
  background: linear-gradient(135deg, #3aa0ff, #0052cc);
  transform: scale(1.05);
  box-shadow: 0 4px 10px rgba(0,0,0,0.5);
}

/* klik */
button:active {
  transform: scale(0.95);
}

/* popup */
.popup {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(10,25,47,0.8); /* overlay biru gelap */
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  pointer-events: none;
  transition: 0.3s;
}

.popup.show {
  opacity: 1;
  pointer-events: auto;
}

.popup-box {
  background: #112240;
  padding: 20px;
  border-radius: 15px;
  text-align: center;
  width: 80%;
  max-width: 300px;
  transform: scale(0.7);
  transition: 0.3s;
}

.popup.show .popup-box {
  transform: scale(1);
}

.popup.hide .popup-box {
  transform: scale(0.7);
  opacity: 0;
}