/* ==========================================================================
   AdeptwizBarcodes - Modern Design System & Global Styles
   ========================================================================== */

:root {
  /* Color Palette - Dark Theme (Default) */
  --bg-primary: #0b0f19;
  --bg-secondary: #111827;
  --bg-tertiary: #1f293d;
  --bg-card: rgba(17, 24, 39, 0.85);
  --bg-card-hover: rgba(31, 41, 61, 0.9);
  --bg-input: #0e1424;
  --bg-modal-backdrop: rgba(3, 7, 18, 0.8);
  
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-medium: rgba(255, 255, 255, 0.14);
  --border-focus: #6366f1;
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #0f172a;

  /* Accent Gradients & Brand */
  --brand-primary: #4f46e5;
  --brand-primary-hover: #4338ca;
  --brand-secondary: #06b6d4;
  --brand-accent: #38bdf8;
  --brand-gradient: linear-gradient(135deg, #4f46e5 0%, #06b6d4 100%);
  --brand-gradient-hover: linear-gradient(135deg, #4338ca 0%, #0891b2 100%);
  --brand-glow: 0 0 24px rgba(79, 70, 229, 0.35);

  --status-success: #10b981;
  --status-success-bg: rgba(16, 185, 129, 0.15);
  --status-warning: #f59e0b;
  --status-warning-bg: rgba(245, 158, 11, 0.15);
  --status-danger: #ef4444;
  --status-danger-bg: rgba(239, 68, 68, 0.15);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Plus Jakarta Sans', 'Outfit', sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;

  /* Shadow & Radius */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);
  --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.35), 0 0 0 1px var(--border-subtle);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Theme Overrides */
body.light-theme {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.95);
  --bg-card-hover: #ffffff;
  --bg-input: #ffffff;
  --bg-modal-backdrop: rgba(15, 23, 42, 0.6);

  --border-subtle: #e2e8f0;
  --border-medium: #cbd5e1;
  --border-focus: #4f46e5;

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-inverse: #f8fafc;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.12);
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.06), 0 0 0 1px #e2e8f0;
}

/* Base Reset & Box Sizing */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Typography Defaults */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-primary);
}

p {
  color: var(--text-secondary);
}

a {
  color: var(--brand-accent);
  text-decoration: none;
}

/* App Header */
.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: border-color var(--transition-normal);
}

.header-container {
  max-width: 1720px;
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand-group {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  cursor: pointer;
  user-select: none;
}

.brand-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  filter: drop-shadow(0 2px 8px rgba(79, 70, 229, 0.4));
  transition: transform var(--transition-fast);
}

.brand-group:hover .brand-logo {
  transform: scale(1.06) rotate(2deg);
}

.brand-title {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.brand-title span {
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-tagline {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: -2px;
}

/* Nav Tabs in Header */
.nav-tabs {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--bg-tertiary);
  padding: 0.35rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
}

.nav-tab-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  font-family: var(--font-heading);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: transparent;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.nav-tab-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.06);
}

.nav-tab-btn.active {
  color: #ffffff;
  background: var(--brand-gradient);
  box-shadow: 0 2px 10px rgba(79, 70, 229, 0.4);
}

.nav-tab-btn svg {
  transition: transform var(--transition-fast);
}

.nav-tab-btn:hover svg {
  transform: scale(1.1);
}

.badge-pill {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.25);
  color: #ffffff;
  letter-spacing: 0.04em;
}

/* Header Action Buttons */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.theme-toggle-btn {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-medium);
  transform: translateY(-1px);
}

body.dark-theme .sun-icon {
  display: block;
}
body.dark-theme .moon-icon {
  display: none;
}
body.light-theme .sun-icon {
  display: none;
}
body.light-theme .moon-icon {
  display: block;
}

/* Main Layout & Tab Panes */
.app-main {
  flex: 1;
  position: relative;
}

.tab-pane {
  display: none;
  animation: fadeIn 200ms ease-in-out;
}

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

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* General Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.6rem 1.25rem;
  font-family: var(--font-heading);
  font-size: 0.88rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

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

.btn-primary {
  background: var(--brand-gradient);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(79, 70, 229, 0.35);
}

.btn-primary:hover {
  background: var(--brand-gradient-hover);
  box-shadow: 0 4px 14px rgba(79, 70, 229, 0.5);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border-color: var(--border-medium);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--brand-accent);
}

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

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--border-focus);
}

.btn-accent {
  background: rgba(56, 189, 248, 0.12);
  color: var(--brand-accent);
  border-color: rgba(56, 189, 248, 0.35);
}

.btn-accent:hover {
  background: rgba(56, 189, 248, 0.22);
  border-color: var(--brand-accent);
}

.btn-sm {
  padding: 0.4rem 0.8rem;
  font-size: 0.8rem;
}

.btn-xs {
  padding: 0.25rem 0.55rem;
  font-size: 0.75rem;
}

.btn-lg {
  padding: 0.75rem 1.4rem;
  font-size: 0.95rem;
}

.w-full {
  width: 100%;
}

/* Form Controls & Inputs */
.form-group {
  margin-bottom: 1rem;
}

.form-label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
}

.form-input, .form-textarea, .form-select {
  width: 100%;
  padding: 0.6rem 0.85rem;
  font-family: var(--font-sans);
  font-size: 0.88rem;
  color: var(--text-primary);
  background-color: var(--bg-input);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  outline: none;
  transition: all var(--transition-fast);
}

.form-input:focus, .form-textarea:focus, .form-select:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.form-input-sm, .form-select-sm {
  padding: 0.4rem 0.65rem;
  font-size: 0.8rem;
}

.form-input-xs, .form-select-xs {
  padding: 0.25rem 0.5rem;
  font-size: 0.75rem;
}

.helper-text {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.35rem;
}

.font-mono {
  font-family: var(--font-mono);
}

/* Select wrapper styling */
.select-wrapper {
  position: relative;
}

/* Checkbox Styling */
.custom-checkbox {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  cursor: pointer;
  font-size: 0.84rem;
  color: var(--text-secondary);
  user-select: none;
}

.custom-checkbox input {
  position: absolute;
  opacity: 0;
  cursor: pointer;
  height: 0;
  width: 0;
}

.checkmark {
  width: 18px;
  height: 18px;
  background-color: var(--bg-input);
  border: 1px solid var(--border-medium);
  border-radius: 4px;
  position: relative;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.custom-checkbox:hover input ~ .checkmark {
  border-color: var(--border-focus);
}

.custom-checkbox input:checked ~ .checkmark {
  background-color: var(--brand-primary);
  border-color: var(--brand-primary);
}

.checkmark:after {
  content: "";
  position: absolute;
  display: none;
  left: 5px;
  top: 2px;
  width: 4px;
  height: 8px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.custom-checkbox input:checked ~ .checkmark:after {
  display: block;
}

.checkbox-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

/* Range Sliders */
.form-range {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--bg-tertiary);
  outline: none;
  cursor: pointer;
}

.form-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--brand-accent);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.4);
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.form-range::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

/* Color Picker Input */
.color-picker-input {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.form-color-picker {
  -webkit-appearance: none;
  border: 1px solid var(--border-medium);
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: none;
  cursor: pointer;
  padding: 2px;
}

.form-color-picker::-webkit-color-swatch-wrapper {
  padding: 0;
}

.form-color-picker::-webkit-color-swatch {
  border: none;
  border-radius: calc(var(--radius-sm) - 3px);
}

/* Segmented Controls */
.segmented-control {
  display: flex;
  background: var(--bg-tertiary);
  padding: 3px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  gap: 2px;
}

.segment-btn {
  flex: 1;
  padding: 0.45rem 0.6rem;
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 600;
  background: transparent;
  color: var(--text-secondary);
  border: none;
  border-radius: calc(var(--radius-sm) - 2px);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
}

.segment-btn:hover {
  color: var(--text-primary);
}

.segment-btn.active {
  background: var(--bg-card);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

/* Grid Utilities */
.grid-2-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem;
}

.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 1rem; }
.hidden { display: none !important; }
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* Modals */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: var(--bg-modal-backdrop);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  animation: modalFadeIn 200ms ease;
}

.modal-dialog {
  background: var(--bg-secondary);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: modalSlideUp 200ms cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-sm { max-width: 440px; }
.modal-md { max-width: 600px; }
.modal-lg { max-width: 860px; }
.modal-xl { max-width: 1100px; }

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

.modal-title {
  font-size: 1.15rem;
}

.modal-close-btn {
  background: transparent;
  border: none;
  font-size: 1.5rem;
  color: var(--text-muted);
  cursor: pointer;
  line-height: 1;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

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

.modal-body {
  padding: 1.5rem;
  overflow-y: auto;
}

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

@keyframes modalSlideUp {
  from { opacity: 0; transform: translateY(12px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-medium);
  box-shadow: var(--shadow-lg);
  padding: 0.75rem 1.2rem;
  border-radius: var(--radius-sm);
  font-size: 0.86rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  min-width: 260px;
  animation: toastSlideIn 250ms cubic-bezier(0.16, 1, 0.3, 1);
  transition: all var(--transition-normal);
}

.toast.success { border-left: 4px solid var(--status-success); }
.toast.error { border-left: 4px solid var(--status-danger); }
.toast.info { border-left: 4px solid var(--brand-accent); }

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

/* Responsive adjustments */
@media (max-width: 1024px) {
  .header-container {
    flex-wrap: wrap;
  }
  .nav-tabs {
    order: 3;
    width: 100%;
    justify-content: center;
    overflow-x: auto;
  }
}