/* ==========================================================================
   Design System Tokens & Root Variables
   Slate & Indigo Enterprise Theme, Inter Typography, Elevation Shadows & Radii
   ========================================================================== */
:root {
  /* Color Palette - Slate & Indigo Enterprise Theme */
  --bg-color: #f8fafc;
  --bg-gradient: radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.04) 0px, transparent 50%),
                 radial-gradient(at 100% 100%, rgba(16, 185, 129, 0.03) 0px, transparent 50%);
  
  --surface-solid: #ffffff;
  --surface-color: rgba(255, 255, 255, 0.9);
  --surface-alt: #f1f5f9;
  --surface-hover: #e2e8f0;
  
  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  
  /* Primary & Accent Colors */
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-active: #3730a3;
  --primary-light: #e0e7ff;
  --primary-glow: rgba(79, 70, 229, 0.2);
  
  /* Status & Action Colors */
  --success: #10b981;
  --success-bg: #d1fae5;
  --warning: #f59e0b;
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --danger-light: #fee2e2;
  
  /* Borders & Dividers */
  --border-color: #e2e8f0;
  --border-focus: #818cf8;
  
  /* Radius Tokens */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  /* Elevation Shadows */
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 14px -2px rgba(15, 23, 42, 0.08), 0 2px 6px -1px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 12px 28px -4px rgba(15, 23, 42, 0.12), 0 4px 12px -2px rgba(15, 23, 42, 0.06);
  --shadow-glow: 0 0 20px rgba(79, 70, 229, 0.15);
  
  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  
  /* Transition Easings */
  --transition-bezier: cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s var(--transition-bezier);
  --transition-normal: all 0.25s var(--transition-bezier);
}

body.dark-theme {
  --bg-color: #0f172a;
  --bg-gradient: radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.08) 0px, transparent 50%),
                 radial-gradient(at 100% 100%, rgba(16, 185, 129, 0.05) 0px, transparent 50%);
  --surface-solid: #1e293b;
  --surface-color: rgba(30, 41, 59, 0.9);
  --surface-alt: #334155;
  --surface-hover: #475569;
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-light: #64748b;
  
  --border-color: #334155;
  --border-focus: #6366f1;

  --primary-light: rgba(79, 70, 229, 0.2);
  --btn-secondary-bg: #1e293b;
}

/* Base Reset & Typography */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-color);
  background-image: var(--bg-gradient);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 1.5rem;
}

/* App Header / Navigation */
.app-header {
  background-color: var(--surface-solid);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 0.875rem;
  padding-bottom: 0.875rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-icon {
  font-size: 1.75rem;
  filter: drop-shadow(0 2px 4px rgba(79, 70, 229, 0.3));
}

.brand-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Hero Control Deck Layout (Top Focal Point) */
.hero-deck {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

@media (min-width: 860px) {
  .hero-deck {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    align-items: start;
  }
}

/* Card Component */
.card {
  background-color: var(--surface-solid);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: var(--transition-normal);
}

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

.card-header {
  padding: 1.25rem 1.5rem;
  background-color: transparent;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.01em;
}

.card-body {
  padding: 1.5rem;
}

.p-0 { padding: 0 !important; }

/* Camera Scanner Card */
.hidden { 
  display: none !important; 
  opacity: 0; 
  pointer-events: none; 
}

.scanner-card {
  border-color: rgba(79, 70, 229, 0.2);
}

.camera-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  background-color: #0f172a;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.5);
}

#reader {
  width: 100% !important;
  height: 100% !important;
  border: none !important;
}

#reader video {
  width: 100% !important;
  height: 100% !important;
  object-fit: cover;
}

.scanner-reticle {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 80%;
  height: 50%;
  border: 3px solid rgba(79, 70, 229, 0.8);
  border-radius: 12px;
  pointer-events: none;
  box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-normal);
}

.reticle-line {
  width: 100%;
  height: 2px;
  background-color: var(--danger);
  animation: scan-pulse 1.5s infinite ease-in-out;
  box-shadow: 0 0 8px var(--danger);
}

@keyframes scan-pulse {
  0%, 100% { opacity: 0.1; transform: translateY(-30px); }
  50% { opacity: 1; transform: translateY(30px); }
}

/* Status Badges & Indicators */
.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.badge-wal {
  background-color: var(--primary-light);
  color: var(--primary-hover);
}

.status-indicator {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
}

.status-indicator::before {
  content: '';
  width: 7px;
  height: 7px;
  border-radius: 50%;
  display: block;
}

.status-off { background-color: var(--surface-alt); color: var(--text-muted); }
.status-off::before { background-color: var(--text-muted); }

.status-active { background-color: var(--success-bg); color: #065f46; }
.status-active::before { background-color: var(--success); box-shadow: 0 0 6px var(--success); }

/* Form Controls & Mobile-First Touch Sizing (Min 44px) */
.form-card {
  border-top: 4px solid var(--primary);
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 0.5rem;
}

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

.form-control {
  width: 100%;
  min-height: 44px;
  padding: 0.625rem 1rem;
  font-size: 1rem;
  font-family: var(--font-sans);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: var(--surface-alt);
  transition: var(--transition-fast);
}

.form-control:hover {
  background-color: var(--surface-solid);
  border-color: #cbd5e1;
}

.form-control:focus {
  outline: none;
  background-color: var(--surface-solid);
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--primary-glow);
}

.form-control-sm {
  min-height: 44px;
  padding: 0.4rem 0.875rem;
  font-size: 0.9rem;
  border-radius: var(--radius-sm);
}

.input-with-button {
  display: flex;
  gap: 0.5rem;
}

.quantity-stepper {
  display: flex;
  align-items: center;
  background-color: var(--surface-alt);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  overflow: hidden;
}

.quantity-stepper input {
  border: none;
  background: transparent;
  border-radius: 0;
  font-weight: 700;
  font-size: 1.1rem;
}

.quantity-stepper input:focus {
  box-shadow: none;
}

.btn-step {
  min-width: 44px;
  min-height: 44px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-step:hover {
  background-color: var(--surface-hover);
  color: var(--primary);
}

.btn-step:active {
  transform: scale(0.94);
}

.toggle-checkbox {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  user-select: none;
}

.toggle-checkbox input[type="checkbox"] {
  width: 20px;
  height: 20px;
  accent-color: var(--primary);
  cursor: pointer;
}

/* Action Buttons & Touch Targets (Min 44px) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  min-width: 44px;
  padding: 0.625rem 1.25rem;
  font-size: 0.95rem;
  font-weight: 600;
  font-family: var(--font-sans);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition-fast);
  text-decoration: none;
  user-select: none;
}

.btn-sm {
  min-height: 44px;
  padding: 0.4rem 1rem;
  font-size: 0.875rem;
  border-radius: var(--radius-sm);
}

.btn-primary { 
  background-color: var(--primary); 
  color: #ffffff; 
  box-shadow: 0 4px 10px rgba(79, 70, 229, 0.25);
}

.btn-primary:hover { 
  background-color: var(--primary-hover); 
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(79, 70, 229, 0.35);
}

.btn-primary:active {
  background-color: var(--primary-active);
  transform: translateY(1px) scale(0.98);
  box-shadow: 0 2px 4px rgba(79, 70, 229, 0.2);
}

.btn-secondary, .btn-export { 
  background-color: var(--surface-solid); 
  color: var(--text-main); 
  border-color: var(--border-color); 
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover, .btn-export:hover { 
  background-color: var(--surface-alt); 
  border-color: var(--border-focus);
  transform: translateY(-1px);
}

.btn-secondary:active, .btn-export:active {
  transform: translateY(1px) scale(0.98);
}

.btn-danger, .btn-delete {
  background-color: var(--surface-solid);
  color: var(--danger);
  border-color: var(--danger-light);
}

.btn-danger:hover, .btn-delete:hover {
  background-color: var(--danger);
  color: #ffffff;
  border-color: var(--danger);
  transform: translateY(-1px);
  box-shadow: 0 4px 10px rgba(239, 68, 68, 0.25);
}

.btn-danger:active, .btn-delete:active {
  transform: translateY(1px) scale(0.98);
}

.btn-outline { 
  background-color: transparent; 
  border-color: var(--border-color); 
  color: var(--text-main); 
}

.btn-outline:hover { 
  background-color: var(--surface-alt);
  border-color: #cbd5e1;
}

.btn-outline:active {
  transform: scale(0.98);
}

.btn-block { width: 100%; }

.btn-icon { margin-right: 0.5rem; font-size: 1.1em; }

/* Inventory Section & Data Table */
.inventory-section {
  margin-top: 1rem;
}

.table-header-flex {
  flex-direction: column;
  align-items: flex-start;
  gap: 1rem;
}

@media (min-width: 640px) {
  .table-header-flex {
    flex-direction: row;
    align-items: center;
  }
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
  max-height: 600px;
  overflow-y: auto;
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

.data-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  text-align: left;
  font-size: 0.95rem;
}

.data-table th {
  position: sticky;
  top: 0;
  background-color: var(--surface-solid);
  padding: 1rem 1.5rem;
  font-weight: 700;
  color: var(--text-muted);
  border-bottom: 2px solid var(--border-color);
  z-index: 10;
  white-space: nowrap;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  font-size: 0.75rem;
}

.data-table td {
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  vertical-align: middle;
}

.data-table tbody tr {
  transition: background-color 0.15s ease, opacity 0.3s ease, transform 0.3s ease;
}

/* Zebra Striping */
.data-table tbody tr:nth-child(even) {
  background-color: var(--surface-alt);
}

.data-table tbody tr:hover { 
  background-color: var(--primary-light); 
}

/* Barcode Monospace Badge */
.barcode-badge, .data-table td.font-mono {
  font-family: var(--font-mono);
  font-weight: 600;
  background-color: rgba(79, 70, 229, 0.06);
  color: var(--primary);
  padding: 0.25rem 0.625rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(79, 70, 229, 0.15);
  display: inline-block;
  letter-spacing: 0.04em;
}

.item-row {
  animation: item-slide-in 0.3s var(--transition-bezier);
}

@keyframes item-slide-in {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* HTMX Swapping Transition */
tr.htmx-swapping {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 300ms ease, transform 300ms ease;
}

.empty-state { 
  padding: 4rem 2rem !important; 
  font-size: 1.05rem;
}

.table-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Slide-in Toast Notifications Overlay */
#toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 1000;
  display: flex;
  flex-direction: column-reverse;
  gap: 0.75rem;
  pointer-events: none;
}

@media (max-width: 600px) {
  #toast-container {
    top: 1rem;
    bottom: auto;
    right: 1rem;
    left: 1rem;
    flex-direction: column;
  }
}

.toast {
  pointer-events: auto;
  min-width: 320px;
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: 0.95rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.toast-icon {
  font-size: 1.25rem;
}

.toast-success { background-color: rgba(209, 250, 229, 0.95); color: #065f46; border: 1px solid #6ee7b7; }
.toast-error { background-color: rgba(254, 226, 226, 0.95); color: #991b1b; border: 1px solid #fca5a5; }
.toast-info { background-color: rgba(224, 231, 255, 0.95); color: #3730a3; border: 1px solid #a5b4fc; }

.animate-slide-in {
  animation: slide-in-toast 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

@keyframes slide-in-toast {
  0% { transform: translateY(100%) scale(0.95); opacity: 0; }
  100% { transform: translateY(0) scale(1); opacity: 1; }
}

/* Search Box */
.search-box {
  width: 100%;
}

@media (min-width: 640px) {
  .search-box {
    width: 300px;
    margin-left: auto;
  }
}

.search-box input {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='11' cy='11' r='8'%3E%3C/circle%3E%3Cline x1='21' y1='21' x2='16.65' y2='16.65'%3E%3C/line%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: 0.75rem center;
  padding-left: 2.5rem;
  border-radius: var(--radius-full);
}

/* Utility Classes */
.font-mono { font-family: var(--font-mono); }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.text-sm { font-size: 0.85rem; }
.mt-2 { margin-top: 0.5rem; }
.flex { display: flex; }
.items-center { align-items: center; }
.gap-1 { gap: 0.25rem; }