html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  font-family: "Poppins", sans-serif;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
  background-size: 400% 400%;
  animation: gradientBG 12s ease infinite;
}

@keyframes gradientBG {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

#manageStockSection {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  justify-content: center;
  align-items: center;
  animation: fadeIn 0.6s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.manage-stock-container {
  background: linear-gradient(135deg, #1c1c1c, #2c2c2c);
  box-shadow: 0 10px 30px rgba(0,0,0,0.6);
  border-radius: 20px;
  width: 420px;
  padding: 30px;
  text-align: center;
  transform: scale(0.95);
  opacity: 0;
  transition: all 0.4s ease-in-out;
  margin: auto;
  animation: popup 0.5s ease forwards;
}

@keyframes popup {
  from { transform: scale(0.8); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.manage-stock-container.active {
  transform: scale(1);
  opacity: 1;
}

.title {
  font-size: 2rem;
  font-weight: 800;
  background: linear-gradient(90deg, #ff9a9e, #fad0c4, #fad390);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 25px;
}

.form-label {
  font-size: 0.85rem;
  color: #e2e8f0;
  margin-bottom: 6px;
  display: block;
  text-align: left;
}

.form-control {
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.2);
  color: #fff;
  border-radius: 12px;
  padding: 12px;
  width: 100%;
  margin-bottom: 18px;
  transition: all 0.3s;
}

.form-control:focus {
  border-color: #00ffe0;
  box-shadow: 0 0 12px #00ffe080;
  outline: none;
}

/* ===== Buttons ===== */
.btn {
  display: block;
  width: 100%;
  padding: 14px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 14px;
  border: none;
  margin-bottom: 14px;
  cursor: pointer;
  color: #fff;
  position: relative;
  overflow: hidden;
  transition: all 0.4s ease;
}

.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(120deg, transparent, rgba(255,255,255,0.2), transparent);
  transform: translateX(-100%);
  transition: 0.5s;
}

.btn:hover::before {
  transform: translateX(100%);
}


.btn-success {
  background: linear-gradient(135deg, #00b09b, #96c93d);
  box-shadow: 0 0 10px #00b09b80;
}

.btn-danger {
  background: linear-gradient(135deg, #ff416c, #ff4b2b);
  box-shadow: 0 0 10px #ff416c80;
}

.btn-primary {
  background: linear-gradient(135deg, #36d1dc, #5b86e5);
  box-shadow: 0 0 10px #36d1dc80;
}

.btn:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 0 18px rgba(0,0,0,0.6);
}

.btn-close {
  position: absolute;
  top: 10px;
  right: 15px;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.6rem;
  cursor: pointer;
  transition: color 0.2s ease;
}

.btn-close:hover {
  color: #ff4d4d;
}


/* ===== Stock Page ===== */

#stockPage {
  background: rgba(0,0,0,0.85);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  position: fixed;
  inset: 0;
  z-index: 9998;
  animation: fadeIn 0.6s ease;
}

@keyframes fadeOut {
  from { opacity: 1; }
  to { opacity: 0; }
}

.stock-container {
  background: linear-gradient(145deg, #1f1f1f, #283e51);
  padding: 40px;
  width: 85%;
  max-width: 620px;
  border-radius: 30px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  text-align: center;
  margin: auto;
  animation: slideUp 0.6s ease;
}

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

.return-btn {
  font-size: 14px;
  padding: 12px 22px;
  border-radius: 12px;
  background: transparent;
  border: 2px solid #00ffe0;
  color: #00ffe0;
  font-weight: 600;
  cursor: pointer;
  margin-bottom: 20px;
  transition: all 0.3s;
}

.return-btn:hover {
  background: #00ffe0;
  color: #000;
  box-shadow: 0 0 12px #00ffe080;
}

.stock-container .title {
  font-size: 28px;
  background: linear-gradient(45deg, #ffffff, #00aeff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 900;
  margin-bottom: 20px;
}
/* ===== Stock List ===== */
.stock-list {
  list-style: none;
  padding: 0;
  margin: 0;
  max-height: 360px;
  overflow-y: auto;
}

.stock-list li {
  background: rgba(255,255,255,0.08);
  padding: 16px 20px;
  margin-bottom: 14px;
  border-radius: 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  animation: fadeItem 0.5s ease forwards;
  opacity: 0;
}

.stock-list li:nth-child(odd) { animation-delay: 0.1s; }
.stock-list li:nth-child(even) { animation-delay: 0.2s; }

@keyframes fadeItem {
  from { transform: translateY(15px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.stock-list li:hover {
  background: rgba(255,255,255,0.15);
  transform: scale(1.03);
  transition: all 0.3s;
}

.stock-list .model {
  font-weight: 600;
  color: #f1f5f9;
}

.stock-list .count {
  background: linear-gradient(90deg, #00ffe0, #5b86e5);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: bold;
  color: #000;
}

/* ===== Custom Scrollbar ===== */
.stock-list::-webkit-scrollbar {
  width: 6px;
}

.stock-list::-webkit-scrollbar-thumb {
  background: linear-gradient(#36d1dc, #5b86e5);
  border-radius: 6px;
}

.stock-list::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar {
  width: 0px;
  background: transparent;
}