/* ============================
   Admin Modern Theme CSS
   Variables & Core Styles
   ============================ */

:root {
  /* Colors */
  --ink: #0f1117;
  --ink-2: #3a3d4a;
  --ink-3: #7b7f8e;
  --ink-4: #b8bbc6;
  --surface: #f7f8fc;
  --surface-2: #eef0f7;
  --white: #ffffff;
  --blue: #2563eb;
  --blue-soft: #eff4ff;
  --blue-mid: #93b4fa;
  --green: #059669;
  --green-soft: #ecfdf5;
  --red: #dc2626;
  --red-soft: #fef2f2;
  --amber: #d97706;
  --amber-soft: #fffbeb;
  --border: #e2e5f0;
  --border-strong: #c8ccd8;
  --radius: 10px;
  --radius-lg: 16px;
  --shadow: 0 1px 3px rgba(15,17,23,0.08);
  --font: 'Sarabun', -apple-system, sans-serif;
  --mono: 'IBM Plex Mono', 'Courier New', monospace;
}

/* Page Container */
.admin-page {
  background: var(--surface);
  min-height: 100vh;
  padding: 28px;
  font-family: var(--font);
  color: var(--ink);
}

/* Page Header */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
}

.page-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 12px;
}

.page-subtitle {
  font-size: 14px;
  color: var(--ink-3);
  margin-top: 6px;
}

/* Buttons */
.btn {
  border: none;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  transition: all 0.2s ease;
  padding: 10px 20px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-primary {
  background: var(--blue);
  color: var(--white);
}

.btn-primary:hover {
  background: #1e40af;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(37,99,235,0.3);
}

.btn-secondary {
  background: var(--surface-2);
  color: var(--ink-2);
}

.btn-secondary:hover {
  background: var(--border);
}

.btn-icon {
  border: none;
  background: transparent;
  cursor: pointer;
  width: 38px;
  height: 38px;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  font-size: 15px;
  position: relative;
  overflow: hidden;
}

.btn-icon::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.2;
  transform: translate(-50%, -50%);
  transition: width 0.3s, height 0.3s;
}

.btn-icon:hover::before {
  width: 100%;
  height: 100%;
}

.btn-icon:active {
  transform: scale(0.95);
}

.btn-icon.edit {
  color: var(--blue);
  background: var(--blue-soft);
  border: 1px solid transparent;
}

.btn-icon.edit:hover {
  background: var(--blue);
  color: var(--white);
  border-color: var(--blue);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
  transform: translateY(-2px);
}

.btn-icon.img {
  color: var(--amber);
  background: var(--amber-soft);
  border: 1px solid transparent;
}

.btn-icon.img:hover {
  background: var(--amber);
  color: var(--white);
  border-color: var(--amber);
  box-shadow: 0 4px 12px rgba(217, 119, 6, 0.3);
  transform: translateY(-2px);
}

.btn-icon.delete {
  color: var(--red);
  background: var(--red-soft);
  border: 1px solid transparent;
}

.btn-icon.delete:hover {
  background: var(--red);
  color: var(--white);
  border-color: var(--red);
  box-shadow: 0 4px 12px rgba(220, 38, 38, 0.3);
  transform: translateY(-2px);
}

.btn-icon i {
  position: relative;
  z-index: 1;
  transition: transform 0.2s ease;
}

.btn-icon:hover i {
  transform: scale(1.1);
}

/* Stats Row */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 28px;
}

.stat-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow);
  transition: all 0.2s ease;
}

.stat-card:hover {
  box-shadow: 0 4px 12px rgba(15,17,23,0.12);
  transform: translateY(-2px);
}

.stat-card .icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
  font-size: 20px;
}

.stat-card.blue .icon {
  background: var(--blue-soft);
  color: var(--blue);
}

.stat-card.green .icon {
  background: var(--green-soft);
  color: var(--green);
}

.stat-card.amber .icon {
  background: var(--amber-soft);
  color: var(--amber);
}

.stat-card.red .icon {
  background: var(--red-soft);
  color: var(--red);
}

.stat-card .value {
  font-size: 32px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 4px;
}

.stat-card .label {
  font-size: 14px;
  color: var(--ink-3);
}

/* Toolbar */
.toolbar {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 20px;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  align-items: center;
}

.search-wrap {
  flex: 1;
  min-width: 280px;
  position: relative;
}

.search-wrap i {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--ink-3);
  pointer-events: none;
}

.input-base {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 14px 10px 40px;
  font-size: 15px;
  font-family: var(--font);
  transition: all 0.2s ease;
}

.input-base:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px var(--blue-soft);
}

.select-base {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 14px;
  font-size: 15px;
  font-family: var(--font);
  background: var(--white);
  cursor: pointer;
  min-width: 180px;
  transition: all 0.2s ease;
}

.select-base:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px var(--blue-soft);
}

/* Chips */
.chips {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.chip {
  border: 1px solid var(--border);
  background: var(--white);
  color: var(--ink-2);
  border-radius: 20px;
  padding: 8px 18px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.chip:hover {
  background: var(--surface);
  border-color: var(--border-strong);
}

.chip.active {
  background: var(--blue);
  color: var(--white);
  border-color: var(--blue);
}

/* Table Card */
.table-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

thead {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

th {
  text-align: left;
  padding: 14px 16px;
  font-size: 13px;
  font-weight: 700;
  color: var(--ink-2);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

td {
  padding: 16px;
  border-bottom: 1px solid var(--border);
  font-size: 15px;
  color: var(--ink);
}

tbody tr {
  transition: background 0.15s ease;
}

tbody tr:hover {
  background: var(--surface);
}

tbody tr:last-child td {
  border-bottom: none;
}

.prod-img {
  width: 52px;
  height: 52px;
  border-radius: var(--radius);
  object-fit: cover;
  border: 1px solid var(--border);
  background: var(--surface);
}

.prod-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.prod-info .txt {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.prod-info .name {
  font-weight: 600;
  color: var(--ink);
}

.prod-info .name-en {
  font-size: 13px;
  color: var(--ink-3);
}

.badge {
  display: inline-block;
  padding: 5px 12px;
  border-radius: 12px;
  font-size: 13px;
  font-weight: 600;
}

.badge.available {
  background: var(--green-soft);
  color: var(--green);
}

.badge.unavailable {
  background: var(--red-soft);
  color: var(--red);
}

.actions {
  display: flex;
  gap: 8px;
  align-items: center;
  justify-content: flex-start;
}

/* Footer */
.table-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.table-info {
  font-size: 14px;
  color: var(--ink-3);
}

.pagination {
  display: flex;
  gap: 6px;
}

.page-btn {
  border: 1px solid var(--border);
  background: var(--white);
  color: var(--ink-2);
  border-radius: var(--radius);
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.page-btn:hover:not(:disabled) {
  background: var(--surface);
  border-color: var(--border-strong);
}

.page-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.page-btn.active {
  background: var(--blue);
  color: var(--white);
  border-color: var(--blue);
}

/* Modal Overlay */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15,17,23,0.5);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
  animation: fadeIn 0.2s ease;
}

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

.modal {
  background: var(--white);
  border-radius: var(--radius-lg);
  max-width: 900px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(15,17,23,0.3);
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.modal-header {
  padding: 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 10px;
}

.modal-body {
  padding: 24px;
}

.modal-footer {
  padding: 20px 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  background: var(--surface);
}

/* Form Grid */
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group.full {
  grid-column: 1 / -1;
}

.form-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-2);
}

.form-label .required {
  color: var(--red);
  margin-left: 2px;
}

.form-input,
.form-textarea,
.form-select {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 14px;
  font-size: 15px;
  font-family: var(--font);
  transition: all 0.2s ease;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px var(--blue-soft);
}

.form-textarea {
  resize: vertical;
  min-height: 100px;
  font-family: var(--mono);
  font-size: 13px;
}

.form-hint {
  font-size: 13px;
  color: var(--ink-3);
  font-style: italic;
}

.form-checkbox {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
}

.form-checkbox input {
  width: 18px;
  height: 18px;
  cursor: pointer;
}

/* Specs Builder */
.specs-builder {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.spec-item {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 12px;
  align-items: center;
}

.btn-remove {
  width: 36px;
  height: 36px;
  border-radius: var(--radius);
  border: 1px solid var(--red-soft);
  background: var(--red-soft);
  color: var(--red);
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-remove:hover {
  background: var(--red);
  color: var(--white);
}

.btn-add-spec {
  width: 100%;
  border: 1px dashed var(--border-strong);
  background: var(--surface);
  color: var(--ink-2);
  border-radius: var(--radius);
  padding: 10px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-add-spec:hover {
  background: var(--surface-2);
  border-color: var(--blue);
  color: var(--blue);
}

/* Album Grid */
.album-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.album-item {
  position: relative;
  aspect-ratio: 1;
  border-radius: var(--radius);
  overflow: hidden;
  border: 2px solid var(--border);
  background: var(--surface);
  cursor: pointer;
  transition: all 0.2s ease;
}

.album-item:hover {
  border-color: var(--blue);
  box-shadow: 0 4px 12px rgba(37,99,235,0.15);
}

.album-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.album-item .actions {
  position: absolute;
  top: 8px;
  right: 8px;
  display: flex;
  gap: 6px;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.album-item:hover .actions {
  opacity: 1;
}

.album-item .cover-badge {
  position: absolute;
  bottom: 8px;
  left: 8px;
  background: var(--green);
  color: var(--white);
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
}

.img-upload {
  grid-column: 1 / -1;
  border: 2px dashed var(--border-strong);
  background: var(--surface);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.img-upload:hover {
  border-color: var(--blue);
  background: var(--blue-soft);
}

.img-upload i {
  font-size: 36px;
  color: var(--ink-3);
  margin-bottom: 12px;
  display: block;
}

.img-upload .txt {
  font-size: 15px;
  color: var(--ink-2);
  font-weight: 600;
  margin-bottom: 4px;
}

.img-upload .hint {
  font-size: 13px;
  color: var(--ink-3);
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--ink-3);
}

.empty-state i {
  font-size: 64px;
  color: var(--ink-4);
  margin-bottom: 16px;
  display: block;
}

.empty-state .txt {
  font-size: 16px;
  margin-bottom: 20px;
}

/* Loading */
.loading {
  text-align: center;
  padding: 60px 20px;
}

.spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--surface);
  border-top-color: var(--blue);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 16px;
}

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

/* Responsive */
@media (max-width: 900px) {
  .stats-row {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .form-grid {
    grid-template-columns: 1fr;
  }
  
  .album-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 600px) {
  .stats-row {
    grid-template-columns: 1fr;
  }
  
  .album-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}