body {
  margin: 0;
  font-family: 'Orbitron', sans-serif;
  background: #0a0a0a;
  color: #00ffe7;
  overflow-x: hidden;
}

h1, h2, h3 {
  text-align: center;
  text-shadow: 0 0 10px #00ffe7;
}

.container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  padding: 20px;
}

.card {
  background: #111;
  border: 2px solid #00ffe7;
  border-radius: 15px;
  overflow: hidden;
  text-align: center;
  cursor: pointer;
  transition: 0.3s;
  box-shadow: 0 0 15px #00ffe7;
}

.card:hover {
  transform: scale(1.05);
  background: #00ffe7;
  color: #111;
}

.card img {
  width: 100%;
  height: 150px;
  object-fit: cover;
}

.form-section {
  max-width: 500px;
  margin: 30px auto;
  background: #111;
  padding: 20px;
  border-radius: 15px;
  box-shadow: 0 0 20px #00ffe7;
}

label {
  font-weight: bold;
  display: block;
  margin-top: 15px;
}

input, select {
  width: 100%;
  padding: 10px;
  margin-top: 5px;
  border: 2px solid #00ffe7;
  border-radius: 10px;
  background: #000;
  color: #00ffe7;
}

.nominal-container {
  display: flex;
  flex-direction: column;
  gap: 15px;
  margin-top: 15px;
}

.nominal-card {
  background: #000;
  padding: 15px;
  border: 2px solid #00ffe7;
  border-radius: 10px;
  cursor: pointer;
  transition: 0.3s;
  text-align: center;
}

.nominal-card:hover {
  background: #00ffe7;
  color: #000;
}

.price {
  color: #00ff00;
  font-weight: bold;
  margin-top: 5px;
}

button {
  background: #00ffe7;
  border: none;
  padding: 12px;
  border-radius: 10px;
  width: 100%;
  color: #111;
  font-size: 1rem;
  font-weight: bold;
  cursor: pointer;
  margin-top: 15px;
}

button:hover {
  background: #00ff00;
}

.back-button {
  background: #ff0055;
}

.back-button:hover {
  background: #ff3385;
}

.search-bar {
  width: 90%;
  margin: 20px auto;
  display: block;
  padding: 10px;
  border: 2px solid #00ffe7;
  background: #000;
  color: #00ffe7;
  border-radius: 10px;
}

#qrisImage {
  max-width: 300px;
  display: block;
  margin: 20px auto;
  border: 2px solid #00ffe7;
  border-radius: 15px;
}

/* WhatsApp Button */
#whatsapp-button {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 55px;
  height: 55px;
  background-color: #25d366;
  border-radius: 50%;
  box-shadow: 0 0 10px #25d366;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  transition: transform 0.3s;
}

#whatsapp-button:hover {
  transform: scale(1.1);
}

#whatsapp-button img {
  width: 30px;
  height: 30px;
}

/* Modal Pop-up */
.modal {
  display: none;
  position: fixed;
  z-index: 2000;
  left: 0; top: 0;
  width: 100%; height: 100%;
  overflow: auto;
  background-color: rgba(0, 0, 0, 0.7);
  animation: fadeIn 0.5s;
}

.modal-content {
  background-color: #111;
  margin: 10% auto;
  padding: 20px;
  border: 2px solid #00ffe7;
  border-radius: 15px;
  width: 90%;
  max-width: 400px;
  text-align: center;
  color: #00ffe7;
  box-shadow: 0 0 20px #00ffe7;
  animation: slideIn 0.5s;
}

@keyframes fadeIn { from {opacity: 0;} to {opacity: 1;} }
@keyframes slideIn { from {transform: translateY(-50px);} to {transform: translateY(0);} }

/* Spinner Progress */
.spinner {
  width: 50px;
  height: 50px;
  border: 5px solid #00ffe7;
  border-top: 5px solid #111;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 20px auto;
  display: none;
}
@keyframes fadeIn {
  0% { opacity: 0; }
  100% { opacity: 1; }
}

.slider-container {
  width: 95%;
  max-width: 1000px;
  margin: 40px auto;
  overflow: hidden;
  border-radius: 15px;
  box-shadow: 0 0 20px #00ffe7;
  position: relative;
  background-color: #111;
  aspect-ratio: 16/9;
}

.slides {
  display: flex;
  height: 100%;
  transition: transform 0.5s ease-in-out;
}

.slides img {
  flex: 0 0 100%;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 15px;
}

@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }