:root {
  --primary-color: #0d6efd;
  --primary-hover: #0b5ed7;
  --danger-color: #dc3545;
  --danger-hover: #a71d2a;
  --success-color: #198754;

  /* Backgrounds */
  --bg-color: #1a1a1a;
  --bg-surface: #2c2c2c;
  --bg-surface-2: #3a3a3a;
  --bg-gradient: radial-gradient(
    circle,
    rgba(63, 63, 63, 1) 0%,
    rgba(26, 26, 26, 1) 100%
  );

  /* Text */
  --text-color: #f0f0f0;
  --text-muted: #aaa;
  --text-dark: #1a1a1a;

  /* Glassmorphism */
  --glass-bg: rgba(44, 44, 44, 0.65);
  --glass-bg-header: rgba(30, 30, 30, 0.75);
  --glass-border: 1px solid rgba(255, 255, 255, 0.1);
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  --glass-blur: blur(10px);

  /* Sidebar */
  --sidebar-bg: #212529;
  --sidebar-text: #f0f0f0;
  --sidebar-text-muted: #aaa;
  --sidebar-border: #000;
  --sidebar-logo-border: #555;
  --sidebar-hover-bg: #555;
  --sidebar-hover-text: #ffffff;
  --sidebar-logo-filter: invert(0);
  --sidebar-width: 250px;
  --header-height: 60px;
  --transition-speed: 0.3s;
}

/*  Colors: Light Theme  */
html.light-theme {
  --bg-color: #f4f7f6;
  --bg-surface: #ffffff;
  --bg-surface-2: #e9ecef;
  --bg-gradient: radial-gradient(
    circle,
    rgba(255, 255, 255, 1) 0%,
    rgba(244, 247, 246, 1) 100%
  );

  --text-color: #212529;
  --text-muted: #6c757d;

  --glass-bg: rgba(255, 255, 255, 0.65);
  --glass-bg-header: rgba(248, 249, 250, 0.75);
  --glass-border: 1px solid rgba(0, 0, 0, 0.1);
  --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.2);

  /* Sidebar Light Theme */
  --sidebar-bg: #ffffff;
  --sidebar-text: #212529;
  --sidebar-text-muted: #6c757d;
  --sidebar-border: #dee2e6;
  --sidebar-logo-border: #dee2e6;
  --sidebar-hover-bg: #e9ecef;
  --sidebar-hover-text: #000000;
  --sidebar-logo-filter: invert(1);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
  color: var(--text-color);
  line-height: 1.6;
  background-color: var(--bg-color);
  background-image: var(--bg-gradient);
  background-attachment: fixed;
  transition: background-color 0.3s ease, color 0.3s ease;
}

button {
  cursor: pointer;
  font-family: inherit;
  font-size: 1rem;
  padding: 0.5em 1em;
  border: 1px solid transparent;
  border-radius: 4px;
  transition: all var(--transition-speed) ease;
}

/*  Primary Button Style  */
button.primary {
  background: rgba(13, 110, 253, 0.7);
  color: white;
  border: 1px solid rgba(13, 110, 253, 0.9);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  font-weight: 500;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}
button.primary:hover {
  background: rgba(11, 94, 215, 0.9);
  border-color: var(--primary-hover);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

button.danger {
  background-color: var(--danger-color);
  color: white;
  border-color: var(--danger-color);
}
button.danger:hover {
  background-color: var(--danger-hover);
  border-color: var(--danger-hover);
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--primary-color);
  text-decoration: none;
}
a:hover {
  color: var(--primary-hover);
}

input,
textarea,
select {
  background: var(--bg-surface-2);
  color: var(--text-color);
  border: var(--glass-border);
  padding: 0.5rem;
  border-radius: 4px;
  font-family: inherit;
  font-size: 1rem;
  transition: background-color 0.3s ease, border-color 0.3s ease,
    color 0.3s ease;
}
input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px var(--primary-hover);
}
select {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml;charset=US-ASCII,%3Csvg%20width%3D%2220%22%20height%3D%2220%22%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%3E%3Cpath%20d%3D%22M5%208l5%205%205-5z%22%20fill%3D%22%23aaa%22/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.5rem center;
  background-size: 1.2em;
  padding-right: 2rem;
}
html.light-theme select {
  background-image: url("data:image/svg+xml;charset=US-ASCII,%3Csvg%20width%3D%2220%22%20height%3D%2220%22%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%3E%3Cpath%20d%3D%22M5%208l5%205%205-5z%22%20fill%3D%22%23333%22/%3E%3C/svg%3E");
}
select:disabled {
  opacity: 0.5;
}

/*  Layout  */
#sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  border-right: 1px solid var(--sidebar-border);
  padding: 1rem;
  transform: translateX(0);
  transition: transform var(--transition-speed) ease-in-out,
    background-color 0.3s ease, color 0.3s ease;
  z-index: 1000;
  overflow-y: auto;
  box-shadow: 4px 0 10px rgba(0, 0, 0, 0.3);
}

body:not(.sidebar-open) #sidebar {
  transform: translateX(-100%);
}

#main-content {
  padding-top: var(--header-height);
  padding-left: 1.5rem;
  padding-right: 1.5rem;
  margin-left: var(--sidebar-width);
  transition: margin-left var(--transition-speed) ease-in-out;
}

body:not(.sidebar-open) #main-content {
  margin-left: 0;
}

.main-header {
  position: fixed;
  top: 0;
  left: var(--sidebar-width);
  right: 0;
  height: var(--header-height);
  display: flex;
  align-items: center;
  padding: 0 1.5rem;
  z-index: 900;
  transition: left var(--transition-speed) ease-in-out,
    background-color 0.3s ease, border-color 0.3s ease;
  background: var(--glass-bg-header);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: var(--glass-border);
}

body:not(.sidebar-open) .main-header {
  left: 0;
}

.main-header h1 {
  font-size: 1.5rem;
  margin: 0 1.5rem 0 0;
  color: var(--text-color);
  flex-shrink: 0;
}
.main-header h1.header-link a {
  color: inherit;
  text-decoration: none;
}
.main-header h1.header-link a:hover {
  color: var(--text-muted);
}

.header-controls {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-shrink: 0;
}

.user-info {
  font-size: 0.9rem;
  color: var(--text-muted);
  white-space: nowrap;
}
.user-info strong {
  color: var(--text-color);
}
#logout-btn {
  font-size: 0.9rem;
  padding: 0.4em 0.8em;
  background: var(--danger-color);
  color: white;
  border: none;
}
#logout-btn:hover {
  background: var(--danger-hover);
}

/* Theme Toggle Button */
#theme-toggle {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-color);
  font-size: 1.2rem;
  padding: 0.3rem 0.5rem;
  line-height: 1;
  border-radius: 6px;
  width: 40px;
}
#theme-toggle:hover {
  background: var(--bg-surface);
  border-color: var(--text-muted);
}

#sidebar-toggle,
#cart-toggle {
  background: none;
  border: none;
  font-size: 1.5rem;
  padding: 0.25rem;
  color: var(--text-color);
  flex-shrink: 0;
}
#cart-toggle[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
}

#current-category-title {
  margin-top: 1.5rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
  color: var(--text-color);
}

/* Sidebar */
.sidebar-logo {
  padding: 0.5rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--sidebar-logo-border);
}
.sidebar-logo img {
  max-width: 33.5%;
  margin: 0 auto;
  filter: var(--sidebar-logo-filter);
  transition: filter 0.3s ease;
}
#sidebar h2 {
  color: var(--sidebar-text);
  padding-left: 0.75rem;
}
#category-list ul {
  list-style: none;
  padding-left: 0;
  margin-top: 1rem;
}
#category-list .category-title {
  font-weight: bold;
  font-size: 1.1rem;
  margin-top: 1rem;
  color: var(--sidebar-text);
  padding-left: 0.75rem;
}
#category-list .subcategory-link {
  display: block;
  padding: 0.5rem 0.75rem;
  text-decoration: none;
  color: var(--sidebar-text-muted);
  border-radius: 4px;
}
#category-list .subcategory-link:hover {
  background-color: var(--sidebar-hover-bg);
  color: var(--sidebar-hover-text);
}
#category-list .subcategory-link strong {
  color: var(--sidebar-text);
}

/* Article Grid  */
#article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1.5rem;
}

.article-card {
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, box-shadow 0.2s ease,
    background-color 0.3s ease, border-color 0.3s ease;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  box-shadow: var(--glass-shadow);
}
.article-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 35px 0 rgba(0, 0, 0, 0.45);
  html.light-theme & {
    box-shadow: 0 12px 35px 0 rgba(31, 38, 135, 0.3);
  }
}

.article-link {
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.article-card img {
  width: 100%;
  height: 200px;
  object-fit: contain;
  background-color: rgba(58, 58, 58, 0.5);
  display: block;
  transition: background-color 0.3s ease;
  padding: 0.5rem;
}
html.light-theme .article-card img {
  background-color: rgba(233, 236, 239, 0.5);
}

.article-card img[src$="/images/sorus.png"] {
  filter: var(--sidebar-logo-filter);
  transition: filter 0.3s ease;
}

.article-card-content {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.article-card-content h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  color: var(--text-color);
}

.article-card-content .description {
  font-size: 0.9rem;
  color: var(--text-muted);
  flex-grow: 1;
  margin-bottom: 1rem;
}

.article-card-content .article-barcode {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: -0.25rem;
  margin-bottom: 0.5rem;
  word-break: break-all;
}

.article-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: auto;
  gap: 0.5rem;
}

.price-container {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}
.price.original {
  font-size: 0.9rem;
  color: var(--text-muted);
  text-decoration: line-through;
}
.price.discounted {
  font-size: 1.25rem;
  font-weight: bold;
  color: var(--danger-color);
}
.price.normal {
  font-size: 1.25rem;
  font-weight: bold;
  color: var(--text-color);
}

.add-to-cart-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.add-to-cart-controls .quantity-input-grid {
  width: 50px;
  padding: 0.4em 0.5em;
  font-size: 0.9rem;
  text-align: center;
  -moz-appearance: textfield;
}
.add-to-cart-controls .quantity-input-grid::-webkit-outer-spin-button,
.add-to-cart-controls .quantity-input-grid::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.add-to-cart-controls .add-to-cart-btn {
  padding: 0.4em 0.8em;
  font-size: 0.9rem;
  line-height: 1.4;
}

/*  Cart Modal  */
#cart-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 2000;
}

.cart-content {
  width: 90%;
  max-width: 650px;
  max-height: 90vh;
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  box-shadow: var(--glass-shadow);
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.cart-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  background: rgba(58, 58, 58, 0.7);
  border-bottom: var(--glass-border);
  transition: background-color 0.3s ease, border-color 0.3s ease;
}
html.light-theme .cart-header {
  background: rgba(233, 236, 239, 0.7);
}

.cart-header h2 {
  font-size: 1.5rem;
}

#cart-close-btn {
  background: none;
  border: none;
  font-size: 2rem;
  font-weight: bold;
  color: var(--text-muted);
}
#cart-close-btn:hover {
  color: var(--text-color);
}

#cart-items-container {
  padding: 1.5rem;
  overflow-y: auto;
  flex-grow: 1;
}

.cart-item {
  display: grid;
  grid-template-columns: 60px 1fr auto auto;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: var(--glass-border);
}
.cart-item:last-child {
  border-bottom: none;
  margin-bottom: 0;
}

.cart-item img {
  width: 60px;
  height: 60px;
  object-fit: contain;
  border-radius: 4px;
  background-color: var(--bg-surface-2);
}
.cart-item img[src$="/images/sorus.png"] {
  object-fit: contain;
  background-color: var(--bg-surface);
  filter: var(--sidebar-logo-filter);
  transition: filter 0.3s ease;
  html.light-theme & {
    background-color: var(--bg-color);
  }
}

.cart-item-info {
  flex-grow: 1;
}
.cart-item-info h4 {
  font-size: 1rem;
  margin: 0;
}
.cart-item-info .price {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.cart-item-quantity {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.cart-item-quantity button {
  font-size: 1.2rem;
  font-weight: bold;
  padding: 0;
  width: 30px;
  height: 30px;
  line-height: 30px;
  text-align: center;
  background: var(--bg-surface);
  color: var(--text-color);
  border: var(--glass-border);
}
.cart-item-quantity button:hover {
  background: var(--bg-color);
}

.cart-item-total {
  font-size: 1.1rem;
  font-weight: bold;
  text-align: right;
  min-width: 80px;
}

.cart-summary {
  padding: 1.5rem;
  background: rgba(58, 58, 58, 0.7);
  border-top: var(--glass-border);
  transition: background-color 0.3s ease, border-color 0.3s ease;
}
html.light-theme .cart-summary {
  background: rgba(233, 236, 239, 0.7);
}

.summary-line {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}
.summary-line span:last-child {
  color: var(--text-color);
}
.summary-line.total {
  font-size: 1.2rem;
  font-weight: bold;
  margin-top: 0.5rem;
  color: var(--text-color);
}
#cart-discount-amount-total {
  color: var(--danger-color);
}

/* Article Detail Page */
#article-detail-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  max-width: 1100px;
  margin: 2rem auto;
  padding: 2rem;
  border-radius: 12px;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  box-shadow: var(--glass-shadow);
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

#article-detail-image img {
  display: block;
  margin: 0 auto;
  width: auto;
  height: auto;
  max-width: 60%;
  max-height: 300px;
  object-fit: contain;
}
#article-detail-image img[src$="/images/sorus.png"] {
  filter: var(--sidebar-logo-filter);
  transition: filter 0.3s ease;
}
#article-detail-image {
  overflow: hidden;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
  background: rgba(58, 58, 58, 0.5);
  transition: background-color 0.3s ease;
}
html.light-theme #article-detail-image {
  background: rgba(233, 236, 239, 0.5);
}

#article-detail-info h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}
#article-detail-info .description {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  line-height: 1.7;
}

.article-codes {
  margin-top: -0.5rem;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}
.article-codes span {
  display: inline-block;
  margin-right: 1.5rem;
}

.article-purchase-box {
  padding: 1.5rem;
  border-radius: 8px;
  background: var(--bg-surface-2);
  border: var(--glass-border);
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.article-purchase-box .price-container {
  margin-bottom: 1.5rem;
}
.article-purchase-box .price.original {
  font-size: 1.2rem;
}
.article-purchase-box .price.discounted {
  font-size: 2rem;
}
.article-purchase-box .price.normal {
  font-size: 2rem;
}

.quantity-control {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.quantity-control label {
  font-size: 1.1rem;
  font-weight: bold;
}
.quantity-control input[type="number"] {
  width: 80px;
  font-size: 1.2rem;
  padding: 0.5rem;
  text-align: center;
}
.quantity-control input[type="number"]::-webkit-inner-spin-button,
.quantity-control input[type="number"]::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
.quantity-control input[type="number"] {
  -moz-appearance: textfield;
}

.article-purchase-box #add-to-cart-btn {
  width: 100%;
  font-size: 1.2rem;
  padding: 0.75rem;
}
#add-to-cart-success {
  color: var(--primary-color);
  text-align: center;
  margin-top: 1rem;
  display: none;
}

/* Admin Page Styles */
html.light-theme body.admin-page .admin-header {
  background: rgba(255, 255, 255, 0.8);
  border-bottom: 1px solid rgba(0, 0, 0, 0.15);
}
.admin-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 2rem;
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: 900;
  background: rgba(0, 0, 0, 0.8);
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  transition: background-color 0.3s ease, border-color 0.3s ease;
}
.admin-header a {
  color: var(--text-color);
  text-decoration: none;
  font-size: 0.9rem;
}
.admin-header a:hover {
  text-decoration: underline;
}

/* Admin Tab Navigation  */
.admin-tabs {
  display: flex;
  background-color: var(--bg-surface);
  padding: 0 2rem;
  gap: 1px;
  position: sticky;
  top: var(--header-height);
  z-index: 899;
  border-bottom: 1px solid var(--border-color);
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.tab-link {
  padding: 1rem 1.5rem;
  background: var(--bg-surface-2);
  border: none;
  border-bottom: 3px solid transparent;
  color: var(--text-muted);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease-in-out;
}

.tab-link:hover {
  background: var(--bg-surface);
  color: var(--text-color);
}

.tab-link.active {
  color: var(--text-color);
  background: var(--glass-bg);
  border-bottom: 3px solid var(--primary-color);
}

html.light-theme .admin-tabs {
  background-color: var(--bg-surface-2);
  border-bottom-color: var(--glass-border);
}
html.light-theme .tab-link {
  background: var(--bg-surface-2);
}
html.light-theme .tab-link:hover {
  background: var(--bg-surface);
}
html.light-theme .tab-link.active {
  background: var(--glass-bg);
}

/* Admin Tab Content */
.admin-content-area {
  padding: 2rem;
  max-width: 1400px;
  margin: 0 auto;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.tab-content .admin-section {
  margin-bottom: 2rem;
}
.tab-content .admin-section:last-child {
  margin-bottom: 0;
}

.admin-section {
  border-radius: 12px;
  padding: 1.5rem;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  box-shadow: var(--glass-shadow);
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.admin-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 2rem;
}
.form-group {
  display: flex;
  flex-direction: column;
}
.form-group label {
  margin-bottom: 0.25rem;
  font-weight: bold;
  color: var(--text-muted);
}
.form-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
}
.admin-table th,
.admin-table td {
  padding: 0.75rem;
  text-align: left;
  border-bottom: var(--glass-border);
}
.admin-table th {
  background: rgba(58, 58, 58, 0.7);
}
html.light-theme .admin-table th {
  background: rgba(233, 236, 239, 0.7);
}
.admin-table tr:last-child td {
  border-bottom: none;
}
.admin-table td:last-child {
  text-align: right;
}

.admin-table .action-btn {
  font-size: 0.8rem;
  padding: 0.25em 0.5em;
  margin-left: 0.25rem;
  border: 1px solid;
  background: none;
  color: var(--text-muted);
}
.admin-table .action-btn[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
  color: var(--text-muted);
  border-color: var(--text-muted);
}
.admin-table .edit-btn {
  color: var(--primary-color);
  border-color: var(--primary-color);
}
.admin-table .edit-btn:hover:not([disabled]) {
  background: var(--primary-color);
  color: white;
}
.admin-table .delete-btn {
  color: var(--danger-color);
  border-color: var(--danger-color);
}
.admin-table .delete-btn:hover:not([disabled]) {
  background: var(--danger-color);
  color: white;
}

/* Login Page */
body.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

.login-container {
  width: 100%;
  max-width: 400px;
  padding: 2.5rem;
  border-radius: 12px;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  box-shadow: var(--glass-shadow);
}

.login-logo {
  max-width: 60%;
  margin: 0 auto 1.5rem auto;
}
.login-logo img {
  display: block;
  margin: 0 auto;
  transition: filter 0.3s ease;
  filter: var(--sidebar-logo-filter);
}

.login-container h2 {
  text-align: center;
  margin-bottom: 1.5rem;
  color: var(--text-color);
}
.login-container .form-group {
  margin-bottom: 1rem;
}
.login-container .form-group label {
  color: var(--text-muted);
}
.login-container input {
  background: rgba(58, 58, 58, 0.8);
  border-color: rgba(255, 255, 255, 0.15);
}
html.light-theme .login-container input {
  background: rgba(233, 236, 239, 0.8);
  border-color: rgba(0, 0, 0, 0.15);
}
.login-container button {
  width: 100%;
  padding: 0.75rem;
  font-size: 1.1rem;
  margin-top: 0.5rem;
}

.error-message {
  color: var(--danger-color);
  font-size: 0.9rem;
  text-align: center;
  margin-top: 1rem;
  display: none;
  background-color: rgba(220, 53, 69, 0.1);
  padding: 0.5rem;
  border-radius: 4px;
  border: 1px solid rgba(220, 53, 69, 0.3);
}

/* Search Bar */
.search-form {
  display: flex;
  flex-grow: 1;
  margin-left: 1.5rem;
  margin-right: 1.5rem;
  max-width: 500px;
}

.search-form input[type="search"] {
  flex-grow: 1;
  border: 1px solid var(--border-color);
  border-right: none;
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
  background: var(--bg-surface-2);
  color: var(--text-color);
  padding: 0.5rem 0.75rem;
}
.search-form input[type="search"]:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px var(--primary-hover);
  z-index: 1;
  position: relative;
}

.search-form button {
  padding: 0 1rem;
  background-color: var(--primary-color);
  color: white;
  border: 1px solid var(--primary-color);
  border-left: none;
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
  cursor: pointer;
  font-size: 0.9rem;
  transition: background-color var(--transition-speed) ease;
}
.search-form button:hover {
  background-color: var(--primary-hover);
}

@media (max-width: 900px) {
  .admin-main {
    grid-template-columns: 1fr;
  }
  .admin-tabs {
    flex-direction: column;
    padding: 0 1rem;
    top: calc(var(--header-height) - 1px);
  }
  .admin-content-area {
    padding: 1rem;
  }
}

@media (max-width: 768px) {
  body:not(.sidebar-open) #main-content {
    margin-left: 0;
  }
  body:not(.sidebar-open) .main-header {
    left: 0;
  }
  #sidebar {
    box-shadow: 4px 0 10px rgba(0, 0, 0, 0.3);
  }

  .main-header h1 {
    font-size: 1.2rem;
    margin: 0 0.5rem;
  }
  .header-controls {
    gap: 0.5rem;
  }
  .user-info {
    display: none;
  }

  .search-form {
    display: none;
  }

  #article-detail-container {
    grid-template-columns: 1fr;
    padding: 1rem;
    margin: 1rem 0;
  }
  #article-detail-info h1 {
    font-size: 2rem;
  }
}

/*  Admin Form Styles */
.discount-fieldset {
  border: var(--glass-border);
  padding: 1rem;
  border-radius: 4px;
  margin-top: 1rem;
}
.discount-fieldset legend {
  padding: 0 0.5rem;
}
#user-discounts-form {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1rem;
}
.discount-group {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.discount-group label {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/*  Cart Note Styles */
.cart-item-info .price-discount-note {
  font-size: 0.8rem;
  color: var(--danger-color);
  margin-left: 0.5rem;
}
.cart-item-total .price-original-note {
  display: block;
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: normal;
  text-decoration: line-through;
}

/* Admin Button */
.header-btn {
  display: inline-block;
  font-size: 0.9rem;
  padding: 0.4em 0.8em;
  background: rgba(13, 110, 253, 0.7);
  color: white;
  border: 1px solid rgba(13, 110, 253, 0.9);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  font-weight: 500;
  text-decoration: none;
  border-radius: 4px;
  transition: all var(--transition-speed) ease;
}
.header-btn:hover {
  background: rgba(11, 94, 215, 0.9);
  border-color: var(--primary-hover);
  color: white;
}

/* Pagination Controls */
.pagination-controls {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  margin-top: 2rem;
  padding-bottom: 2rem;
}
.pagination-controls button {
  background: var(--glass-bg);
  color: var(--text-color);
  border: var(--glass-border);
  font-weight: bold;
}
.pagination-controls button:hover:not([disabled]) {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}
.pagination-controls button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}
.pagination-controls span {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Sidebar Scrollbar */
#sidebar::-webkit-scrollbar {
  width: 8px;
}
#sidebar::-webkit-scrollbar-track {
  background: var(--sidebar-bg);
  transition: background-color 0.3s ease;
}
#sidebar::-webkit-scrollbar-thumb {
  background-color: var(--bg-surface-2);
  border-radius: 10px;
  border: 2px solid var(--sidebar-bg);
  transition: background-color 0.3s ease, border-color 0.3s ease;
}
html.light-theme #sidebar::-webkit-scrollbar-thumb {
  border-color: var(--sidebar-bg);
  background-color: #ccc;
}
#sidebar::-webkit-scrollbar-thumb:hover {
  background-color: var(--text-muted);
}

/* Checkout Page Styles */
.checkout-page #cart-toggle {
  opacity: 0.5;
  cursor: not-allowed;
}
.glassmorphism-container {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  box-shadow: var(--glass-shadow);
  border-radius: 12px;
  padding: 2rem;
  transition: background-color 0.3s ease, border-color 0.3s ease;
}
.checkout-container {
  max-width: 800px;
  margin: 2rem auto;
}
.checkout-container h2 {
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
}

/* Checkout Summary Table  */
#checkout-summary table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 2rem;
  display: table;
}
#checkout-summary thead {
  display: table-header-group;
}
#checkout-summary tbody {
  display: table-row-group;
}
#checkout-summary tfoot {
  display: table-footer-group;
}
#checkout-summary tr {
  display: table-row;
}
#checkout-summary th,
#checkout-summary td {
  padding: 0.75rem 0.5rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
  display: table-cell;
  vertical-align: middle;
  transition: border-color 0.3s ease;
}
#checkout-summary th {
  color: var(--text-muted);
  font-size: 0.9rem;
  text-transform: uppercase;
}
#checkout-summary th:first-child,
#checkout-summary td:first-child {
  padding-left: 0;
  padding-right: 0.5rem;
  width: 60px;
  text-align: center;
}
#checkout-summary td img {
  vertical-align: middle;
  max-width: 50px;
  max-height: 50px;
  object-fit: contain;
  border-radius: 4px;
  background: var(--bg-surface-2);
}
#checkout-summary td.item-name {
  font-weight: bold;
}
#checkout-summary td.price,
#checkout-summary td.quantity,
#checkout-summary td.total,
#checkout-summary th:nth-child(3),
#checkout-summary th:nth-child(4),
#checkout-summary th:nth-child(5) {
  text-align: right;
}
#checkout-summary td.price .original {
  display: block;
  font-size: 0.8em;
  color: var(--text-muted);
  text-decoration: line-through;
}
#checkout-summary td.price .discounted {
  color: var(--danger-color);
}
#checkout-summary tfoot td {
  font-weight: bold;
  border-top: 2px solid var(--text-muted);
}
html.light-theme #checkout-summary tfoot td {
  border-top-color: var(--border-color);
}
#checkout-summary tfoot tr:last-child td {
  font-size: 1.2em;
  color: var(--text-color);
}
#checkout-summary tfoot #summary-discount-amount {
  color: var(--danger-color);
}

.checkout-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 2rem;
}
.button.secondary {
  padding: 0.5em 1em;
  background-color: var(--bg-surface-2);
  color: var(--text-color);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  text-decoration: none;
  font-size: 1rem;
  transition: all var(--transition-speed) ease;
}
.button.secondary:hover {
  background-color: var(--bg-surface);
  border-color: var(--text-muted);
}

/* Checkout Shipping Form Styles  */
.checkout-divider {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: 2rem 0;
}
#shipping-display-and-form h4 {
  margin-bottom: 1rem;
  color: var(--text-muted);
}
.address-display-block {
  background: var(--bg-surface);
  padding: 1rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  margin-bottom: 1rem;
  transition: background-color 0.3s ease, border-color 0.3s ease;
}
.address-display-block p {
  margin-bottom: 0.5rem;
  line-height: 1.4;
}
.address-display-block p strong {
  color: var(--text-muted);
  min-width: 70px;
  display: inline-block;
}
.address-display-block p span {
  color: var(--text-color);
}
.address-display-block small {
  display: block;
  margin-top: 0.5rem;
  font-size: 0.85em;
  color: var(--text-muted);
  text-align: right;
}
.form-group.checkbox-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1rem;
}
.form-group.checkbox-group input[type="checkbox"] {
  width: auto;
  margin-top: 2px;
  accent-color: var(--primary-color);
  cursor: pointer;
}
.form-group.checkbox-group label {
  margin-bottom: 0;
  font-weight: normal;
  color: var(--text-color);
  cursor: pointer;
}
#alternate-address-form {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px dashed var(--border-color);
}
#alternate-address-form textarea {
  min-height: 60px;
  resize: vertical;
}

/* Order Confirmation Modal  */
#confirmation-modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.75);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 5000;
  opacity: 0;
  transition: opacity 0.3s ease;
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
}
#confirmation-modal-overlay.visible {
  display: flex;
  opacity: 1;
}
#confirmation-modal-content {
  max-width: 450px;
  width: 90%;
  text-align: center;
  padding: 2.5rem;
  transform: translateY(-20px) scale(0.98);
  opacity: 0;
  transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1),
    opacity 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}
html.light-theme #confirmation-modal-content {
  background: rgba(255, 255, 255, 0.9);
  border-color: rgba(0, 0, 0, 0.15);
}

#confirmation-modal-overlay.visible #confirmation-modal-content {
  transform: translateY(0) scale(1);
  opacity: 1;
}
.modal-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 1.5rem auto;
}
.modal-icon svg {
  width: 100%;
  height: 100%;
}
.modal-icon svg circle {
  fill: #4caf50;
}
.modal-icon svg path {
  fill: none;
  stroke: #fff;
  stroke-width: 3;
}
#confirmation-modal-content h2 {
  color: var(--text-color);
  margin-bottom: 1rem;
  font-size: 2rem;
}
#confirmation-modal-content p {
  color: var(--text-muted);
  font-size: 1.1rem;
  line-height: 1.6;
}

/* Admin Edit Button on Article Page */
.admin-edit-button-container {
  max-width: 1100px;
  margin: 1.5rem auto -1rem auto;
  padding: 0 2rem;
  text-align: right;
}
#page-edit-article-btn {
  font-size: 0.9rem;
  padding: 0.5em 1em;
}

/* Edit Article Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.75);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 4000;
  opacity: 0;
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  transition: opacity 0.3s ease;
}
.modal-overlay.visible {
  display: flex;
  opacity: 1;
}

.edit-modal-content {
  width: 90%;
  max-width: 700px;
  max-height: 90vh;
  overflow-y: auto;
  padding: 2rem;
  position: relative;
  opacity: 0;
  transform: translateY(-20px) scale(0.98);
  transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1),
    opacity 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}
.modal-overlay.visible .edit-modal-content {
  transform: translateY(0) scale(1);
  opacity: 1;
}

.modal-close-btn {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  font-size: 2.5rem;
  font-weight: bold;
  color: var(--text-muted);
  cursor: pointer;
  line-height: 1;
  padding: 0;
}
.modal-close-btn:hover {
  color: var(--text-color);
}

.edit-modal-content h2 {
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
}

.edit-modal-content .admin-form {
  margin-bottom: 0;
}

/*  Batch Upload Status Modal  */
#batch-status-modal-content {
  max-width: 700px;
  text-align: center;
}
html.light-theme #batch-status-modal-content {
  background: rgba(255, 255, 255, 0.9);
  border-color: rgba(0, 0, 0, 0.15);
}

#batch-errors-wrapper,
#batch-categories-wrapper {
  max-height: 200px;
  overflow-y: auto;
  background: var(--bg-surface-2);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem;
  text-align: left;
}

#batch-errors-list,
#batch-categories-list {
  list-style-position: inside;
  padding-left: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-color);
}

#batch-errors-list li {
  color: var(--danger-color);
  margin-bottom: 0.5rem;
}

/* - General Status Modal (for User, Article, Category)  */
#status-modal-content {
  max-width: 450px;
  text-align: center;
}
html.light-theme #status-modal-content {
  background: rgba(255, 255, 255, 0.9);
  border-color: rgba(0, 0, 0, 0.15);
}
/* Register Page Styles  */
.register-link-container {
  text-align: center;
  margin-top: 1.5rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Success message on login/register */
.success-message {
  color: var(--success-color);
  font-size: 0.9rem;
  text-align: center;
  margin-top: 1rem;
  display: none;
  background-color: rgba(25, 135, 84, 0.1);
  padding: 0.5rem;
  border-radius: 4px;
  border: 1px solid rgba(25, 135, 84, 0.3);
}
/* Admin Send Email Button */
#send-email-btn {
  background-color: var(--success-color);
  border-color: var(--success-color);
  color: white;
  font-weight: 500;
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

#send-email-btn:hover {
  background-color: #157347;
  border-color: #157347;
}

#send-email-btn:disabled {
  background-color: var(--success-color);
  border-color: var(--success-color);
  opacity: 0.6;
  cursor: not-allowed;
}

#email-send-status {
  font-size: 0.9rem;
  margin-top: 0.5rem;
}
#email-send-status p {
  padding: 0;
  margin: 0;
}