/* ============================================
   BuildMate Component Styles
   ============================================ */

/* ==== BUTTONS ==== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--input-radius);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  transition: all var(--transition-fast);
  white-space: nowrap;
  line-height: 1.4;
  border: 1px solid transparent;
  cursor: pointer;
  letter-spacing: 0.02em;
}

.btn:active {
  transform: translateY(2px) scale(0.98);
}

.btn svg {
  width: 16px;
  height: 16px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  color: #ffffff;
  box-shadow: 0 2px 4px rgba(37, 99, 235, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.15);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-600), var(--primary-700));
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
}

.btn-success {
  background: var(--success);
  color: #ffffff;
}

.btn-success:hover {
  background: var(--success-dark);
}

.btn-danger {
  background: var(--danger);
  color: #ffffff;
}

.btn-danger:hover {
  background: var(--danger-dark);
}

.btn-warning {
  background: var(--warning);
  color: #ffffff;
}

.btn-outline {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.btn-outline:hover {
  background: var(--page-bg);
  color: var(--text-primary);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}

.btn-ghost:hover {
  background: var(--page-bg);
  color: var(--text-primary);
}

.btn-sm {
  padding: 5px 12px;
  font-size: var(--font-size-xs);
}

.btn-lg {
  padding: 12px 24px;
  font-size: var(--font-size-md);
}

.btn-icon {
  width: 34px;
  height: 34px;
  padding: 0;
  border-radius: 4px;
}

/* ==== CARDS ==== */
.card {
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--card-border);
  border-radius: var(--card-radius);
  box-shadow: var(--card-shadow);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.card:hover {
  box-shadow: var(--card-shadow-hover);
}

.card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-header h3 {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
}

.card-body {
  padding: 20px;
}

.card-footer {
  padding: 12px 20px;
  border-top: 1px solid var(--border-color);
}

/* ==== STAT CARDS (New Minimalist Design) ==== */
.stat-card {
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--card-border);
  border-radius: var(--card-radius);
  padding: 24px; /* More breathing room */
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  transition: all var(--transition-base);
  box-shadow: var(--card-shadow);
}

.stat-card:hover {
  border-color: #cbd5e1;
  box-shadow: var(--card-shadow-hover);
  transform: translateY(-2px);
}

.stat-info {
  flex: 1;
}

.stat-info .label {
  font-size: 0.65rem;
  color: var(--text-tertiary);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

.stat-info .value {
  font-size: 1.75rem;
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  line-height: 1;
}

.stat-info .sub {
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
  margin-top: 8px;
}

.stat-icon {
  width: 32px;
  height: 32px;
  border-radius: 4px;
  background: var(--page-bg);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.stat-icon svg {
  width: 16px;
  height: 16px;
}

.stat-icon.outline {
  background: transparent;
  border: 1px solid var(--border-color);
}

.stat-top-badge {
  background: var(--success-light);
  color: var(--success-dark);
  font-size: 0.65rem;
  font-weight: var(--font-weight-bold);
  padding: 2px 6px;
  border-radius: 2px;
}

/* ==== TABLES ==== */
.table-container {
  overflow-x: auto;
}

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

.data-table thead th {
  padding: 12px 16px;
  text-align: left;
  font-size: 0.7rem;
  font-weight: var(--font-weight-semibold);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background: var(--table-header-bg);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-color);
  border-top: none;
  white-space: nowrap;
  position: sticky;
  top: 0;
  z-index: 10;
}

.data-table tbody tr {
  border-bottom: 1px solid var(--border-color);
  transition: background var(--transition-fast);
}

.data-table tbody tr:hover {
  background: var(--table-row-hover);
}

.data-table tbody td {
  padding: 16px;
  font-size: var(--font-size-sm);
  color: var(--text-primary);
  vertical-align: middle;
}

.data-table tbody td.secondary {
  color: var(--text-secondary);
}

.table-actions {
  display: flex;
  gap: 4px;
}

/* ==== BADGES ==== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 8px;
  border-radius: 2px; /* Square/sharp edges */
  font-size: 0.65rem;
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.badge-success {
  background: var(--success-light);
  color: var(--success-dark);
}

.badge-warning {
  background: var(--warning-light);
  color: var(--warning-dark);
}

.badge-danger {
  background: var(--danger-light);
  color: var(--danger-dark);
}

.badge-info {
  background: var(--info-light);
  color: var(--info-dark);
}

.badge-neutral {
  background: var(--border-light);
  color: var(--text-secondary);
}

.badge-incoming {
  background: #dcfce7;
  color: #166534;
}

.badge-outgoing {
  background: #ffedd5;
  color: #9a3412;
}

/* ==== FORMS ==== */
.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  height: var(--input-height);
  padding: 0 12px;
  border: 1px solid var(--input-border);
  border-radius: var(--input-radius);
  background: var(--input-bg);
  font-size: var(--font-size-sm);
  color: var(--text-primary);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:hover {
  border-color: var(--primary-400);
}

.form-control:focus {
  border-color: var(--input-border-focus);
  outline: none;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15); /* Soft focus ring */
}

.form-control::placeholder {
  color: var(--input-placeholder);
}

textarea.form-control {
  height: auto;
  padding: 10px 12px;
  resize: vertical;
  min-height: 80px;
}

select.form-control {
  cursor: pointer;
  appearance: none;
  background-image: var(--select-arrow);
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 32px;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.form-row-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

@media (max-width: 768px) {
  .form-row, .form-row-3 {
    grid-template-columns: 1fr;
  }
}

/* ==== MODALS ==== */
.modal-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: var(--z-modal-backdrop);
  align-items: center;
  justify-content: center;
  padding: 20px;
  animation: fadeIn var(--transition-base) ease;
}

.modal-backdrop.active {
  display: flex;
}

.modal {
  background: var(--modal-bg);
  border: 1px solid var(--card-border);
  border-radius: 20px; /* Modern roundness */
  box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.2), 0 0 0 1px rgba(255,255,255,0.1);
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  animation: slideUpBounce var(--transition-bounce) ease forwards;
}

@keyframes slideUpBounce {
  0% { opacity: 0; transform: translateY(40px) scale(0.95); }
  100% { opacity: 1; transform: translateY(0) scale(1); }
}

.modal-lg {
  max-width: 720px;
}

.modal-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-header h3 {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
}

.modal-close {
  width: 32px;
  height: 32px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-tertiary);
  transition: all var(--transition-fast);
  cursor: pointer;
  border: none;
  background: transparent;
}

.modal-close:hover {
  background: var(--page-bg);
  color: var(--text-primary);
}

.modal-close svg {
  width: 18px;
  height: 18px;
}

.modal-body {
  padding: 24px;
  overflow-y: auto;
  flex: 1;
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

/* ==== PAGE HEADER ==== */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 12px;
}

.page-header-title h2 {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

.page-header-title p {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-top: 4px;
}

.page-header-actions {
  display: flex;
  gap: 10px;
  align-items: center;
}

/* ==== TOOLBAR (search + filters above tables) ==== */
.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.toolbar-left {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.toolbar-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.search-input {
  position: relative;
}

.search-input input {
  width: 240px;
  height: 36px;
  padding: 0 12px 0 36px;
  border: 1px solid var(--border-color);
  border-radius: var(--input-radius);
  background: var(--card-bg);
  font-size: var(--font-size-sm);
  color: var(--text-primary);
}

.search-input input:focus {
  border-color: var(--input-border-focus);
  outline: none;
}

.search-input input::placeholder {
  color: var(--input-placeholder);
}

.search-input svg {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  color: var(--text-tertiary);
  pointer-events: none;
}

.filter-select {
  height: 36px;
  padding: 0 32px 0 12px;
  border: 1px solid var(--border-color);
  border-radius: var(--input-radius);
  background: var(--card-bg);
  font-size: var(--font-size-sm);
  color: var(--text-primary);
  cursor: pointer;
  appearance: none;
  background-image: var(--select-arrow);
  background-repeat: no-repeat;
  background-position: right 8px center;
}

/* ==== PAGINATION ==== */
.pagination-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-top: 1px solid var(--border-color);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.pagination-info {
  font-size: var(--font-size-sm);
  color: var(--text-tertiary);
}

.pagination-buttons {
  display: flex;
  gap: 4px;
}

.pagination-buttons button {
  width: 32px;
  height: 32px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  background: var(--card-bg);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.pagination-buttons button:hover {
  background: var(--page-bg);
  border-color: var(--text-primary);
  color: var(--text-primary);
}

.pagination-buttons button.active {
  background: var(--primary-500);
  color: #ffffff;
  border-color: var(--primary-500);
}

.pagination-buttons button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ==== EMPTY STATE ==== */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  text-align: center;
}

.empty-state svg {
  width: 48px;
  height: 48px;
  color: var(--text-tertiary);
  margin-bottom: 16px;
}

.empty-state h3 {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.empty-state p {
  font-size: var(--font-size-sm);
  color: var(--text-tertiary);
  max-width: 320px;
}

/* ==== SPLIT LAYOUT (for Incoming/Outgoing) ==== */
.split-layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 20px;
  height: calc(100vh - 120px);
}

.split-layout .side-list {
  overflow-y: auto;
}

.split-layout .detail-panel {
  overflow-y: auto;
}

.list-item {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-light);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.list-item:hover {
  background: #f8f9fa;
}

.list-item.active {
  background: var(--primary-50);
  border-left: 3px solid var(--primary-500);
}

.list-item .item-title {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
}

.list-item .item-sub {
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
  margin-top: 3px;
}

/* ==== REPORT TILES ==== */
.report-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}

.report-tile {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--card-radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 12px;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.report-tile:hover {
  border-color: var(--primary-300);
}

.report-tile-icon {
  width: 52px;
  height: 52px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.report-tile-icon svg {
  width: 24px;
  height: 24px;
}

.report-tile h4 {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
}

.report-tile p {
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
  line-height: 1.4;
}

/* ==== STOCK LEDGER ==== */
.ledger-header {
  background: var(--primary-50);
  border: 1px solid var(--primary-200);
  border-radius: 4px;
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--primary-800);
  margin-bottom: 16px;
}

.ledger-footer {
  background: var(--success-light);
  border: 1px solid #a7f3d0;
  border-radius: 4px;
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--success-dark);
  margin-top: 16px;
}

/* ==== CHART CONTAINER ==== */
.chart-container {
  position: relative;
  width: 100%;
}

.chart-container canvas {
  width: 100% !important;
  max-height: 280px;
}

/* ==== ANIMATIONS ==== */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

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

/* ==== INLINE ACTION LINKS ==== */
.add-row-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary-600);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: color var(--transition-fast);
  margin-top: 8px;
}

.add-row-link:hover {
  color: var(--primary-700);
}

.add-row-link svg {
  width: 16px;
  height: 16px;
}

/* ==== INLINE TABLES (within modals) ==== */
.inline-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--space-4);
}

.inline-table thead th {
  padding: 10px 12px;
  text-align: left;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 2px solid var(--border-color);
  background: var(--table-header-bg);
}

.inline-table tbody tr {
  border-bottom: 1px solid var(--border-color);
  transition: background var(--transition-fast);
}

.inline-table tbody tr:hover {
  background: var(--table-row-hover);
}

.inline-table tbody td {
  padding: 12px;
  font-size: var(--font-size-sm);
  color: var(--text-primary);
  vertical-align: middle;
}

.inline-table .form-control {
  height: 34px;
  padding: 0 8px;
  border-radius: 6px;
  text-align: center;
}

/* ============================================
   Separate Billing Module Styles
   ============================================ */

@keyframes sb-toast-in {
  from { opacity: 0; transform: translateY(12px) scale(0.95); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.sb-page {
  padding: 0 0 48px 0;
  animation: fadeIn 0.25s ease;
}

/* ---- Header ---- */
.sb-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--card-radius);
  padding: 20px 24px;
  margin-bottom: 20px;
  box-shadow: var(--card-shadow);
}

.sb-header-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

.sb-header-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(37,99,235,0.25);
}

.sb-header-title {
  margin: 0;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.sb-header-subtitle {
  margin: 3px 0 0;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.sb-header-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

/* ---- Back button ---- */
.sb-back-btn {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  background: var(--card-bg);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.sb-back-btn:hover {
  background: var(--primary-50);
  border-color: var(--primary-500);
  color: var(--primary-500);
}

/* ---- Buttons ---- */
.sb-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 10px 18px;
  border-radius: 10px;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  white-space: nowrap;
  letter-spacing: 0.01em;
}

.sb-btn:active { transform: scale(0.97); }

.sb-btn-primary {
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  color: white;
  box-shadow: 0 4px 12px rgba(37,99,235,0.3);
  border: 1px solid transparent;
}

.sb-btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-600), var(--primary-700));
  box-shadow: 0 6px 18px rgba(37,99,235,0.4);
  transform: translateY(-1px);
}

.sb-btn-outline {
  background: transparent;
  border: 1.5px solid var(--border-color);
  color: var(--text-secondary);
}

.sb-btn-outline:hover {
  border-color: var(--primary-500);
  color: var(--primary-500);
  background: var(--primary-50);
}

.sb-btn-sm { padding: 7px 14px; font-size: 0.8rem; }

.sb-btn-lg { padding: 12px 28px; font-size: 0.95rem; }

/* ---- Stats Row ---- */
.sb-stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 20px;
}

.sb-stat-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--card-radius);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  box-shadow: var(--card-shadow);
  transition: box-shadow var(--transition-fast), transform var(--transition-fast);
}

.sb-stat-card:hover {
  box-shadow: var(--card-shadow-hover);
  transform: translateY(-2px);
}

.sb-stat-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.sb-stat-blue  { background: rgba(37,99,235,0.1);  color: var(--primary-500); }
.sb-stat-green { background: rgba(5,150,105,0.1);  color: var(--success); }
.sb-stat-amber { background: rgba(217,119,6,0.1);  color: var(--warning); }
.sb-stat-purple{ background: rgba(124,58,237,0.1); color: #7c3aed; }

.sb-stat-value {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.sb-stat-label {
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

/* ---- Search Row ---- */
.sb-search-row {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
  align-items: center;
  flex-wrap: wrap;
}

.sb-search-wrap {
  position: relative;
  flex: 1;
  min-width: 220px;
}

.sb-search-icon {
  position: absolute;
  left: 13px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-tertiary);
  pointer-events: none;
}

.sb-search-input {
  width: 100%;
  height: 42px;
  padding: 0 16px 0 40px;
  border: 1.5px solid var(--input-border);
  border-radius: 10px;
  font-size: 0.875rem;
  background: var(--input-bg);
  color: var(--text-primary);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}

.sb-search-input:focus {
  border-color: var(--input-border-focus);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.12);
}

.sb-select {
  height: 42px;
  padding: 0 36px 0 14px;
  border: 1.5px solid var(--input-border);
  border-radius: 10px;
  font-size: 0.875rem;
  background: var(--input-bg) var(--select-arrow) no-repeat right 10px center / 16px;
  color: var(--text-primary);
  cursor: pointer;
  outline: none;
  appearance: none;
  -webkit-appearance: none;
  transition: border-color var(--transition-fast);
}

.sb-select:focus {
  border-color: var(--input-border-focus);
}

/* ---- Card ---- */
.sb-table-card,
.sb-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--card-radius);
  box-shadow: var(--card-shadow);
  margin-bottom: 16px;
  overflow: hidden;
}

.sb-card-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  background: var(--table-header-bg);
}

.sb-card-header h3 {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.sb-card-body {
  padding: 20px;
}

/* ---- Table ---- */
.sb-table-scroll {
  overflow-x: auto;
}

.sb-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.sb-table th {
  background: var(--table-header-bg);
  padding: 11px 14px;
  text-align: left;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-bottom: 2px solid var(--border-color);
  white-space: nowrap;
}

.sb-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-primary);
  vertical-align: middle;
}

.sb-table-row {
  cursor: pointer;
  transition: background var(--transition-fast);
}

.sb-table-row:hover { background: var(--table-row-hover); }
.sb-table-row:last-child td { border-bottom: none; }

.sb-table-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  font-size: 0.8rem;
  color: var(--text-tertiary);
  border-top: 1px solid var(--border-color);
}

.sb-row-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  background: var(--border-light);
  color: var(--text-secondary);
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 700;
}

.sb-area-badge {
  display: inline-flex;
  padding: 3px 10px;
  background: rgba(5,150,105,0.1);
  color: var(--success);
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 700;
  white-space: nowrap;
}

/* ---- Icon Action Buttons ---- */
.sb-action-row {
  display: flex;
  gap: 4px;
  align-items: center;
}

.sb-icon-btn {
  width: 30px;
  height: 30px;
  border-radius: 7px;
  border: 1.5px solid var(--border-color);
  background: transparent;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  color: var(--text-secondary);
  flex-shrink: 0;
}

.sb-icon-view:hover  { background: var(--info-light);    border-color: var(--info);    color: var(--info); }
.sb-icon-edit:hover  { background: var(--warning-light); border-color: var(--warning); color: var(--warning); }
.sb-icon-copy:hover  { background: var(--primary-50);    border-color: var(--primary-500); color: var(--primary-500); }
.sb-icon-print:hover { background: rgba(124,58,237,0.1); border-color: #7c3aed; color: #7c3aed; }
.sb-icon-tax:hover   { background: rgba(15,60,122,0.1);   border-color: #0f3c7a; color: #0f3c7a; }
.sb-icon-delete:hover{ background: var(--danger-light);  border-color: var(--danger); color: var(--danger); }

/* ---- Empty State ---- */
.sb-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 64px 24px;
  text-align: center;
  color: var(--text-secondary);
}

.sb-empty h3 {
  margin: 16px 0 6px;
  font-size: 1.1rem;
  color: var(--text-primary);
}

.sb-empty p {
  font-size: 0.875rem;
  color: var(--text-tertiary);
}

/* ---- Form Layout ---- */
.sb-form-layout {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.sb-form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.sb-full-span { grid-column: 1 / -1; }

.sb-form-group { display: flex; flex-direction: column; gap: 6px; }

.sb-label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.01em;
}

.sb-required { color: var(--danger); }

.sb-input {
  height: 42px;
  padding: 0 14px;
  border: 1.5px solid var(--input-border);
  border-radius: 10px;
  font-size: 0.875rem;
  background: var(--input-bg);
  color: var(--text-primary);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
  width: 100%;
}

.sb-input:focus {
  border-color: var(--input-border-focus);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.12);
}

.sb-textarea {
  height: auto;
  padding: 10px 14px;
  resize: vertical;
  min-height: 64px;
}

/* ---- Material Table (in form) ---- */
.sb-material-table-wrap {
  overflow-x: auto;
}

.sb-material-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.sb-material-table th {
  background: var(--table-header-bg);
  padding: 10px 12px;
  text-align: left;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-bottom: 2px solid var(--border-color);
  white-space: nowrap;
}

.sb-material-table td {
  padding: 8px;
  border-bottom: 1px solid var(--border-light);
  vertical-align: middle;
}

.sb-material-table tr:last-child td { border-bottom: none; }

.sb-row-num-cell {
  text-align: center;
  width: 36px;
  color: var(--text-tertiary);
  font-size: 0.8rem;
  font-weight: 700;
}

.sb-cell-input {
  width: 100%;
  height: 36px;
  padding: 0 10px;
  border: 1.5px solid var(--input-border);
  border-radius: 8px;
  font-size: 0.875rem;
  background: var(--input-bg);
  color: var(--text-primary);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.sb-cell-input:focus {
  border-color: var(--input-border-focus);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.12);
}

.sb-cell-num { text-align: right; }

.sb-area-cell {
  display: inline-flex;
  padding: 4px 10px;
  background: rgba(5,150,105,0.08);
  color: var(--success);
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 700;
  white-space: nowrap;
  min-width: 60px;
  justify-content: center;
}

/* ---- Totals Row ---- */
.sb-totals-row {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.sb-total-item {
  flex: 1;
  min-width: 140px;
}

.sb-total-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}

.sb-total-value {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

.sb-total-area { color: var(--success); }

.sb-total-sep {
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--text-tertiary);
  flex-shrink: 0;
}

.sb-rate-group { flex: 1.5; min-width: 180px; }

.sb-rate-input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.sb-rate-prefix {
  position: absolute;
  left: 16px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  pointer-events: none;
}

.sb-rate-input {
  padding-left: 48px !important;
  height: 48px !important;
  font-size: 1.1rem !important;
  font-weight: 700;
}

.sb-total-amount { color: var(--primary-500); }

/* ---- Form Actions ---- */
.sb-form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  padding-top: 8px;
}

/* ---- Detail Layout ---- */
.sb-detail-layout { display: flex; flex-direction: column; gap: 16px; }

.sb-info-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.sb-info-item { display: flex; flex-direction: column; gap: 4px; }

.sb-info-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.sb-info-value {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* ---- Summary Card ---- */
.sb-summary-card {
  background: linear-gradient(135deg, var(--primary-700) 0%, var(--primary-900) 100%) !important;
  border-color: var(--primary-600) !important;
}

.sb-summary-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  padding: 24px;
  flex-wrap: wrap;
}

.sb-summary-item { text-align: center; }

.sb-summary-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: rgba(255,255,255,0.6);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}

.sb-summary-value {
  font-size: 1.5rem;
  font-weight: 800;
  color: white;
}

.sb-summary-sep {
  font-size: 1.5rem;
  color: rgba(255,255,255,0.3);
}

.sb-grand-total {
  font-size: 2rem !important;
  color: #60a5fa !important;
  text-shadow: 0 2px 12px rgba(96,165,250,0.3);
}

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

@media (max-width: 640px) {
  .sb-header { flex-direction: column; align-items: flex-start; }
  .sb-stats-row { grid-template-columns: 1fr 1fr; }
  .sb-form-grid { grid-template-columns: 1fr; }
  .sb-info-grid { grid-template-columns: 1fr; }
  .sb-totals-row { flex-direction: column; align-items: stretch; }
  .sb-total-sep { text-align: center; }
  .sb-form-actions { flex-direction: column; }
  .sb-form-actions .sb-btn { width: 100%; justify-content: center; }
  .sb-header-actions { width: 100%; }
  .sb-header-actions .sb-btn { flex: 1; justify-content: center; }
  .sb-table th, .sb-table td { padding: 10px 10px; }
}

@media (max-width: 480px) {
  .sb-stats-row { grid-template-columns: 1fr; }
}

/* ---- Type-colored Add Row Buttons ---- */
.sb-btn-type-slab {
  background: #eff6ff; color: #1d4ed8; border: 1.5px solid #bfdbfe;
}
.sb-btn-type-slab:hover { background: #dbeafe; border-color: #2563eb; }

.sb-btn-type-beam {
  background: #fef3c7; color: #92400e; border: 1.5px solid #fde68a;
}
.sb-btn-type-beam:hover { background: #fde68a; border-color: #d97706; }

.sb-btn-type-open {
  background: #fee2e2; color: #991b1b; border: 1.5px solid #fca5a5;
}
.sb-btn-type-open:hover { background: #fca5a5; border-color: #dc2626; }

/* ---- Formula Legend Strip ---- */
.sb-legend-strip {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 12px 20px;
  margin-bottom: 16px;
  font-size: 0.82rem;
  box-shadow: var(--card-shadow);
}
.sb-legend-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 6px 14px;
  border-radius: 8px;
  gap: 2px;
  min-width: 90px;
}
.sb-legend-item strong { font-size: 0.8rem; font-weight: 700; }
.sb-legend-item span   { font-size: 0.72rem; color: var(--text-tertiary); font-family: monospace; }
.sb-legend-slab { background: #eff6ff; color: #1d4ed8; }
.sb-legend-beam { background: #fef3c7; color: #92400e; }
.sb-legend-open { background: #fee2e2; color: #991b1b; }
.sb-legend-net  { background: #f0fdf4; color: #065f46; }
.sb-legend-sep {
  font-size: 1.2rem;
  font-weight: 300;
  color: var(--text-tertiary);
}

/* ---- Calculation Grid ---- */
.sb-calc-row {
  display: flex;
  align-items: stretch;
  gap: 0;
  border: 1px solid var(--card-border);
  border-radius: 12px;
  overflow: hidden;
  flex-wrap: wrap;
}
.sb-calc-item {
  flex: 1;
  min-width: 110px;
  padding: 16px 18px;
  text-align: center;
  border-right: 1px solid var(--card-border);
}
.sb-calc-item:last-child { border-right: none; }
.sb-calc-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
  color: var(--text-secondary);
}
.sb-calc-val {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 4px;
}
.sb-calc-formula {
  font-size: 0.7rem;
  color: var(--text-tertiary);
  font-family: monospace;
}
.sb-calc-op {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 6px;
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--text-tertiary);
  background: var(--border-light);
  flex: 0 0 32px;
}
.sb-calc-slab { background: rgba(37,99,235,0.06);  }
.sb-calc-slab .sb-calc-label { color: #1d4ed8; }
.sb-calc-slab .sb-calc-val   { color: #1d4ed8; }
.sb-calc-beam { background: rgba(217,119,6,0.06); }
.sb-calc-beam .sb-calc-label { color: #92400e; }
.sb-calc-beam .sb-calc-val   { color: #d97706; }
.sb-calc-open { background: rgba(220,38,38,0.06); }
.sb-calc-open .sb-calc-label { color: #991b1b; }
.sb-calc-open .sb-calc-val   { color: #dc2626; }
.sb-calc-net  { background: rgba(5,150,105,0.08); }
.sb-calc-net  .sb-calc-label { color: #065f46; }
.sb-calc-net-val              { color: #059669 !important; font-size: 1.3rem !important; }

/* ---- Type Selector in Row ---- */
.sb-type-select {
  width: 80px;
  height: 30px;
  padding: 0 4px;
  border-radius: 6px;
  font-size: 0.78rem;
  font-weight: 700;
  cursor: pointer;
  outline: none;
  border-width: 1.5px;
  border-style: solid;
  appearance: none;
  -webkit-appearance: none;
  text-align: center;
}
.sb-type-select:focus { box-shadow: 0 0 0 2px rgba(37,99,235,0.15); }

/* ---- Formula Cell ---- */
.sb-formula-cell {
  font-family: monospace;
  font-size: 0.75rem;
  font-weight: 600;
  white-space: nowrap;
}

/* ---- Deduction Badge ---- */
.sb-deduct-badge {
  display: inline-flex;
  padding: 3px 10px;
  background: rgba(220,38,38,0.1);
  color: #dc2626;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 700;
  white-space: nowrap;
}
.sb-net-badge {
  display: inline-flex;
  padding: 3px 10px;
  background: rgba(5,150,105,0.1);
  color: #059669;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 700;
  white-space: nowrap;
}

/* ---- Area deduct style ---- */
.sb-area-deduct {
  background: rgba(220,38,38,0.08) !important;
  color: #dc2626 !important;
}

/* ---- N/A cell ---- */
.sb-na-cell {
  display: inline-block;
  padding: 0 10px;
  color: var(--text-tertiary);
  font-size: 0.85rem;
}