* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', sans-serif;
  background: #0a0a0f;
  color: #e5e5e5;
  min-height: 100vh;
  padding: 0 1rem;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
}

.loading {
  position: fixed;
  inset: 0;
  background: #0a0a0f;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.5s ease;
}
.loading.hidden {
  opacity: 0;
  pointer-events: none;
}
.spinner {
  width: 3rem;
  height: 3rem;
  border: 3px solid transparent;
  border-top: 3px solid #f97316;
  border-bottom: 3px solid #f97316;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: 1rem;
}
@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.navbar {
  padding: 1.2rem 0 0.5rem;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  margin-bottom: 1.5rem;
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}
.nav-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.nav-avatar {
  width: 3.5rem;
  height: auto;
  border-radius: 50%;
  background: rgba(255,255,255,0.05);
  padding: 0.2rem;
}
.nav-left h1 {
  font-size: 1.6rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, #f97316, #ea580c);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.nav-left p {
  color: #9ca3af;
  font-size: 0.8rem;
}

#authSection {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.btn-login {
  padding: 0.6rem 1.25rem;
  background: transparent;
  border: 1.5px solid rgba(255,255,255,0.15);
  color: #fff;
  border-radius: 0.75rem;
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.3s ease;
}
.btn-login:hover {
  border-color: #f97316;
  background: rgba(249, 115, 22, 0.1);
}
.btn-register {
  padding: 0.6rem 1.25rem;
  background: linear-gradient(135deg, #f97316, #ea580c);
  border: none;
  color: #fff;
  border-radius: 0.75rem;
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.3s ease;
}
.btn-register:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(249, 115, 22, 0.4);
}
.btn-logout {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.1);
  color: #fff;
  padding: 0.4rem 0.8rem;
  border-radius: 0.5rem;
  cursor: pointer;
  transition: all 0.3s ease;
}
.btn-logout:hover {
  background: rgba(255,255,255,0.05);
  border-color: #ef4444;
  color: #ef4444;
}

.main {
  padding-bottom: 4rem;
}
.main-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 2rem;
  align-items: start;
}

.items-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.item-card {
  background: rgba(255,255,255,0.03);
  border-radius: 1rem;
  padding: 1.25rem;
  cursor: pointer;
  transition: all 0.3s ease;
  border: 2px solid transparent;
  display: flex;
  flex-direction: column;
  height: 100%;
}
.item-card:hover {
  background: rgba(255,255,255,0.06);
  transform: translateY(-3px);
}
.item-card.selected {
  border-color: #f97316;
  background: rgba(249, 115, 22, 0.08);
}
.item-card .item-body h3 {
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.2rem;
}
.item-card .item-body .price {
  font-size: 1.2rem;
  font-weight: 700;
  color: #fbbf24;
  margin: 0.2rem 0 0.5rem;
}
.item-card .item-body .features {
  color: rgba(255,255,255,0.6);
  font-size: 0.7rem;
  line-height: 1.6;
  flex: 1;
}
.item-card .item-body .stock {
  color: #ef4444;
  font-size: 0.65rem;
  font-weight: 600;
  margin-top: 0.25rem;
}
.item-card .item-body .selected-badge {
  display: inline-block;
  margin-top: 0.75rem;
  padding: 0.2rem 0.75rem;
  background: linear-gradient(135deg, #f97316, #ea580c);
  color: #fff;
  border-radius: 0.5rem;
  font-weight: 600;
  font-size: 0.7rem;
  align-self: flex-start;
}

.checkout-card {
  background: rgba(255,255,255,0.03);
  border-radius: 1rem;
  padding: 1.5rem;
  position: sticky;
  top: 2rem;
  border: 1px solid rgba(255,255,255,0.05);
}
.checkout-header h2 {
  color: #fff;
  font-size: 1.3rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.checkout-header p {
  color: rgba(255,255,255,0.5);
  font-size: 0.85rem;
  margin-top: 0.25rem;
}
.checkout-body {
  margin-top: 1.25rem;
}

.form-group {
  margin-bottom: 1rem;
}
.form-group label {
  display: block;
  color: rgba(255,255,255,0.7);
  font-weight: 500;
  font-size: 0.8rem;
  margin-bottom: 0.25rem;
}
.form-group input {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border-radius: 0.5rem;
  border: 1px solid rgba(255,255,255,0.06);
  background: rgba(255,255,255,0.03);
  color: #fff;
  font-size: 0.9rem;
  outline: none;
  transition: border 0.3s ease;
}
.form-group input:focus {
  border-color: #f97316;
}
.form-group small {
  display: block;
  color: rgba(255,255,255,0.3);
  font-size: 0.6rem;
  margin-top: 0.2rem;
}

.selected-item {
  background: rgba(255,255,255,0.05);
  border-radius: 0.75rem;
  padding: 0.75rem 1rem;
  margin: 1rem 0;
}
.selected-item-info p:first-child {
  color: #fff;
  font-weight: 600;
  font-size: 0.9rem;
}
.selected-item-info p:last-child {
  font-size: 1.2rem;
  font-weight: 700;
  color: #fbbf24;
}

#qrisContainer {
  margin: 1rem 0;
  text-align: center;
}
#qrisContainer img {
  width: 160px;
  height: auto;
  border-radius: 0.75rem;
  background: #fff;
  padding: 0.5rem;
}
#timer {
  font-family: 'Courier New', monospace;
  font-size: 1.3rem;
  background: rgba(0,0,0,0.3);
  padding: 0.3rem 0.8rem;
  border-radius: 0.5rem;
  display: inline-block;
  color: #fbbf24;
}
#uploadSection input[type="file"] {
  width: 100%;
  padding: 0.6rem;
  border-radius: 0.5rem;
  border: 1px dashed rgba(255,255,255,0.1);
  background: rgba(255,255,255,0.02);
  color: #fff;
  cursor: pointer;
}
#uploadSection input[type="file"]::file-selector-button {
  padding: 0.3rem 1rem;
  border: none;
  border-radius: 0.4rem;
  background: linear-gradient(135deg, #f97316, #ea580c);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
}
#imagePreview {
  max-width: 100%;
  max-height: 120px;
  border-radius: 0.5rem;
  border: 1px solid rgba(255,255,255,0.05);
}

.btn-checkout {
  width: 100%;
  padding: 0.75rem;
  border: none;
  border-radius: 0.75rem;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  background: linear-gradient(135deg, #f97316, #ea580c);
  color: #fff;
  margin-top: 0.5rem;
}
.btn-checkout:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}
.btn-checkout:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(249, 115, 22, 0.3);
}
.btn-upload {
  width: 100%;
  padding: 0.6rem;
  background: linear-gradient(135deg, #22c55e, #16a34a);
  color: #fff;
  border: none;
  border-radius: 0.5rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  margin-top: 0.5rem;
}
.btn-upload:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(34, 197, 94, 0.3);
}

.notes-card {
  margin-top: 1.5rem;
  background: rgba(249, 115, 22, 0.04);
  border-radius: 0.75rem;
  padding: 1rem;
  border: 1px solid rgba(249, 115, 22, 0.05);
}
.notes-card h4 {
  color: #fff;
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
}
.notes-card ul li {
  color: rgba(255,255,255,0.5);
  font-size: 0.75rem;
  padding: 0.1rem 0;
  list-style: none;
}

.modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(12px);
  z-index: 9999;
  align-items: center;
  justify-content: center;
}
.modal.show {
  display: flex;
}
.modal-content {
  background: #14141a;
  padding: 2.5rem 2rem;
  border-radius: 1.5rem;
  max-width: 400px;
  width: 90%;
  border: 1px solid rgba(255,255,255,0.05);
  position: relative;
}
.modal-content .close {
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  font-size: 1.8rem;
  color: rgba(255,255,255,0.3);
  cursor: pointer;
  transition: color 0.3s ease;
}
.modal-content .close:hover {
  color: #fff;
}
.modal-header {
  text-align: center;
  margin-bottom: 1.5rem;
}
.modal-icon {
  font-size: 2.5rem;
  color: #f97316;
  margin-bottom: 0.5rem;
}
.modal-header h2 {
  color: #fff;
  font-size: 1.5rem;
  font-weight: 700;
}
.modal-header p {
  color: rgba(255,255,255,0.5);
  font-size: 0.85rem;
  margin-top: 0.25rem;
}
.modal-content .form-group label {
  font-size: 0.8rem;
}
.modal-content .form-group input {
  background: rgba(255,255,255,0.05);
  border-color: rgba(255,255,255,0.06);
}
.modal-content .btn-primary {
  width: 100%;
  padding: 0.75rem;
  background: linear-gradient(135deg, #f97316, #ea580c);
  border: none;
  border-radius: 0.75rem;
  color: #fff;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.3s ease;
}
.modal-content .btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(249, 115, 22, 0.3);
}
.modal-footer-text {
  text-align: center;
  color: rgba(255,255,255,0.4);
  font-size: 0.8rem;
  margin-top: 0.75rem;
}
.modal-footer-text a {
  color: #f97316;
  text-decoration: none;
  font-weight: 600;
}
.modal-footer-text a:hover {
  text-decoration: underline;
}

@media (max-width: 768px) {
  .main-grid {
    grid-template-columns: 1fr;
  }
  .items-grid {
    grid-template-columns: 1fr 1fr;
  }
  .nav-left h1 {
    font-size: 1.2rem;
  }
  .checkout-card {
    position: static;
  }
}
@media (max-width: 480px) {
  .items-grid {
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
  }
  .item-card {
    padding: 0.75rem;
  }
  .item-card .item-body h3 {
    font-size: 0.75rem;
  }
  .item-card .item-body .price {
    font-size: 0.9rem;
  }
  .item-card .item-body .features {
    font-size: 0.55rem;
  }
  .nav-left h1 {
    font-size: 1rem;
  }
  .modal-content {
    padding: 1.5rem;
  }
  }