:root {
  /* --- Color Palette (Dark Mode Default) --- */
  --bg-color: #000000;
  --card-bg: #1C1C1E;
  --card-bg-active: #2C2C2E;
  --text-primary: #E5E5E7;
  --text-secondary: #8E8E93;
  --accent: #0381FE;
  /* Samsung Blue */
  --accent-dim: rgba(3, 129, 254, 0.2);
  --success: #34C759;
  --danger: #FF3B30;
  --warning: #FF9F0A;
  --border-color: #38383A;
  --overlay-bg: rgba(0, 0, 0, 0.5);

  /* --- Typography --- */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-md: 16px;
  --font-size-lg: 20px;
  /* One UI headers are large */
  --font-size-xl: 34px;
  /* Focus area header */

  /* --- Geometry --- */
  --radius-sm: 12px;
  --radius-md: 18px;
  --radius-lg: 26px;
  /* Squircles */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;

  /* --- Effects --- */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.12);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.24);
  --backdrop-blur: blur(20px);
  --transition-fast: 0.2s cubic-bezier(0.25, 0.1, 0.25, 1);
  --transition-bounce: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  /* Haptic-like bounce */
}

[data-theme="light"] {
  --bg-color: #F2F2F7;
  --card-bg: #FFFFFF;
  --card-bg-active: #E5E5EA;
  --text-primary: #000000;
  --text-secondary: #8E8E93;
  --border-color: #D1D1D6;
  --overlay-bg: rgba(0, 0, 0, 0.2);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 8px 16px rgba(0, 0, 0, 0.08);
}

/* --- Global Reset & Base Styles --- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
  outline: none;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.5;
  overflow-x: hidden;
  /* One UI scroll physics feeling */
  overscroll-behavior-y: none;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--card-bg-active);
  border-radius: 4px;
}

::-webkit-scrollbar-corner {
  background: transparent;
}

/* --- Layout Structure (One UI) --- */
.app-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
  max-width: 100%;
  overflow: hidden;
}

/* Focus Area (Top 1/3) */
.header-area {
  padding: var(--spacing-xl) var(--spacing-lg) var(--spacing-md);
  flex-shrink: 0;
  /* Sticky glass header effect */
  position: sticky;
  top: 0;
  z-index: 100;
  /* background: rgba(var(--bg-color), 0.8);  <-- complex with hex variables, using solid for now or simple opacity if supported */
  background-color: var(--bg-color);
  /* Fallback */
}

@supports (backdrop-filter: blur(20px)) or (-webkit-backdrop-filter: blur(20px)) {
  .header-area.glass {
    background-color: transparent;
    backdrop-filter: var(--backdrop-blur);
    -webkit-backdrop-filter: var(--backdrop-blur);
  }
}

.header-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--spacing-xs);
}

.header-subtitle {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  font-weight: 500;
}

/* Interaction Area (Bottom 2/3) */
.content-area {
  flex-grow: 1;
  overflow-y: auto;
  padding: 0 var(--spacing-lg) 100px;
  /* Extra padding for bottom nav */
  border-top-left-radius: var(--radius-lg);
  border-top-right-radius: var(--radius-lg);
  /* Optional: distinct background for content area if header is different?
     In One UI, usually it flows, but let's keep it clean. */
}

/* --- Components --- */

/* Cards */
.card {
  background-color: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-bounce), background-color var(--transition-fast);
  border: 1px solid transparent;
}

.card:active {
  transform: scale(0.98);
  background-color: var(--card-bg-active);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 24px;
  border-radius: var(--radius-lg);
  /* Squircle buttons */
  font-size: var(--font-size-md);
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: transform var(--transition-bounce), filter 0.2s;
  text-decoration: none;
  width: 100%;
  /* Mobile first: full width usually */
}

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

.btn-primary {
  background-color: var(--accent);
  color: #FFFFFF;
}

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

.btn-danger {
  background-color: rgba(255, 59, 48, 0.15);
  color: var(--danger);
}

.btn-icon {
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: 50%;
}

/* Form Elements */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
  margin-left: var(--spacing-xs);
}

.form-input,
.form-select {
  width: 100%;
  padding: 16px;
  background-color: var(--card-bg-active);
  border: 1px solid transparent;
  /* No default border */
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: var(--font-size-md);
  transition: border-color 0.2s, background-color 0.2s;
  appearance: none;
  /* Remove default browser styling */
}

.form-input:focus,
.form-select:focus {
  background-color: var(--card-bg);
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-dim);
}

/* Tabs / Bottom Navigation */
.bottom-nav {
  position: fixed;
  bottom: 0px;
  /* Floating slightly above bottom */
  left: 0;
  right: 0;
  background-color: var(--card-bg);
  /* Or semi-transparent blur */
  height: 80px;
  /* Tall touch targets */
  display: flex;
  justify-content: space-around;
  align-items: center;
  border-top: 1px solid var(--border-color);
  z-index: 1000;
  padding-bottom: env(safe-area-inset-bottom);
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 10px;
  background: none;
  border: none;
  width: 100%;
  height: 100%;
  cursor: pointer;
  transition: color 0.2s;
}

.nav-item svg {
  width: 24px;
  height: 24px;
  margin-bottom: 4px;
  fill: currentColor;
  transition: transform var(--transition-bounce);
}

.nav-item.active {
  color: var(--accent);
}

.nav-item.active svg {
  transform: translateY(-2px);
}

/* Lists */
.list-group {
  display: flex;
  flex-direction: column;
}

.list-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md);
  background-color: var(--card-bg);
  border-bottom: 1px solid var(--border-color);
}

.list-item:first-child {
  border-top-left-radius: var(--radius-lg);
  border-top-right-radius: var(--radius-lg);
}

.list-item:last-child {
  border-bottom-left-radius: var(--radius-lg);
  border-bottom-right-radius: var(--radius-lg);
  border-bottom: none;
}

.list-item-content {
  flex-grow: 1;
}

.list-item-title {
  font-weight: 600;
  font-size: var(--font-size-md);
}

.list-item-subtitle {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
}

.badge {
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-success {
  background-color: rgba(52, 199, 89, 0.2);
  color: var(--success);
}

.badge-warning {
  background-color: rgba(255, 159, 10, 0.2);
  color: var(--warning);
}

.badge-danger {
  background-color: rgba(255, 59, 48, 0.2);
  color: var(--danger);
}

.badge-neutral {
  background-color: var(--card-bg-active);
  color: var(--text-secondary);
}

/* Utilities */
.text-accent {
  color: var(--accent);
}

.text-success {
  color: var(--success);
}

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

.text-bold {
  font-weight: 700;
}

.mb-1 {
  margin-bottom: var(--spacing-sm);
}

.mb-2 {
  margin-bottom: var(--spacing-md);
}

.mb-3 {
  margin-bottom: var(--spacing-lg);
}

.flex-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.flex-between {
  justify-content: space-between;
}

.flex-center {
  justify-content: center;
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--overlay-bg);
  z-index: 2000;
  opacity: 0;
  pointer-events: none;
  /* Initially hidden */
  transition: opacity 0.3s;
  display: flex;
  align-items: flex-end;
  /* Bottom sheet by default on mobile */
  justify-content: center;
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.modal {
  background-color: var(--bg-color);
  width: 100%;
  max-width: 600px;
  border-top-left-radius: 28px;
  border-top-right-radius: 28px;
  padding: var(--spacing-xl) var(--spacing-lg) var(--spacing-lg);
  transform: translateY(100%);
  transition: transform var(--transition-bounce);
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
}

.modal-overlay.open .modal {
  transform: translateY(0);
}

@media (min-width: 768px) {
  .modal-overlay {
    align-items: center;
    /* Center modal on desktop */
  }

  .modal {
    border-radius: 28px;
    /* Full rounded corners on desktop */
    width: 500px;
    transform: scale(0.9);
    opacity: 0;
  }

  .modal-overlay.open .modal {
    transform: scale(1);
    opacity: 1;
  }

  /* Adjust layout for desktop if needed */
  .app-container {
    max-width: 100%;
    margin: 0 auto;
    /* On extremely wide screens, maybe limit width or use a sidebar nav */
  }
}

/* --- One UI Redesign Specifics --- */

/* Dashboard Circles (Device Care Style) */
.dashboard-hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px 0;
  position: relative;
}

.profit-circle {
  width: 220px;
  height: 220px;
  border-radius: 50%;
  border: 10px solid var(--card-bg-active);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  margin-bottom: var(--spacing-lg);
  background: var(--card-bg);
}

.profit-circle::after {
  content: '';
  position: absolute;
  top: -10px;
  left: -10px;
  right: -10px;
  bottom: -10px;
  border-radius: 50%;
  border: 10px solid var(--accent);
  border-left-color: transparent;
  border-bottom-color: transparent;
  transform: rotate(45deg);
  /* Static mock progress */
}

.profit-label {
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.profit-value {
  font-size: 38px;
  font-weight: 300;
  /* One UI Thin/Light numbers */
}

/* Bubble Cards for Storage/Memory Metaphor (Inventory/Cash) */
.bubble-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: var(--spacing-xl);
}

.bubble-card {
  background-color: var(--card-bg);
  border-radius: 26px;
  /* High radius */
  padding: 20px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  position: relative;
  overflow: hidden;
}

.bubble-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 6px;
  background-color: var(--card-bg-active);
}

.bubble-card.accent-blue::before {
  background-color: var(--accent);
}

.bubble-card.accent-green::before {
  background-color: var(--success);
}

.bubble-icon {
  width: 32px;
  height: 32px;
  background-color: var(--card-bg-active);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.bubble-value {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 4px;
}

.bubble-label {
  font-size: 13px;
  color: var(--text-secondary);
}

/* Clean List Redesign */
.clean-list-header {
  padding: 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.clean-list-item {
  background-color: var(--card-bg);
  padding: 18px 20px;
  margin-bottom: 2px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.clean-list-item:first-of-type {
  border-top-left-radius: 24px;
  border-top-right-radius: 24px;
}

.clean-list-item:last-of-type {
  border-bottom-left-radius: 24px;
  border-bottom-right-radius: 24px;
  margin-bottom: 12px;
}

.icon-box {
  width: 40px;
  height: 40px;
  border-radius: 16px;
  background-color: var(--card-bg-active);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 16px;
  font-size: 18px;
}

.icon-box.income {
  background-color: rgba(52, 199, 89, 0.1);
  color: var(--success);
}

.icon-box.expense {
  background-color: rgba(255, 59, 48, 0.1);
  color: var(--danger);
}

/* Inventory Product Card Redesign */
.inventory-grid {
  padding: 0 16px 80px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  /* Wider cards */
  gap: 20px;
}

/* Force 4 columns on large screens to accommodate wider cards */
@media (min-width: 1200px) {
  .inventory-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Segmented Control (Tabs) */
.segmented-control {
  background-color: var(--card-bg);
  padding: 4px;
  border-radius: 12px;
  display: flex;
  margin: 0 16px 16px;
}

.segment-btn {
  flex: 1;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  padding: 8px;
  font-size: 13px;
  font-weight: 600;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.2s;
}

.segment-btn.active {
  background-color: var(--card-bg-active);
  color: var(--text-primary);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.product-card {
  background-color: var(--card-bg);
  border-radius: 28px;
  /* Bigger radius */
  padding: 0;
  /* Removing padding to let image bleed */
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid transparent;
  transition: transform 0.2s, box-shadow 0.2s;
  display: flex;
  flex-direction: column;
  min-height: 380px;
  /* Taller card */
}

.product-card:active {
  transform: scale(0.98);
}

.product-image-container {
  width: 100%;
  padding-top: 75%;
  /* 4:3 Aspect Ratio */
  position: relative;
  background-color: var(--card-bg-active);
  overflow: hidden;
}

.product-image {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s;
}

.product-card:hover .product-image {
  transform: scale(1.05);
}

.product-placeholder {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
}

.product-content {
  padding: 16px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.product-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
}

.product-model {
  font-size: 20px;
  /* Larger font */
  font-weight: 700;
  margin-bottom: 4px;
  line-height: 1.3;
}

.product-condition {
  font-size: 12px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.product-badge {
  padding: 6px 12px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  background: var(--card-bg-active);
  color: var(--text-secondary);
}

.product-badge.active {
  background: rgba(3, 129, 254, 0.15);
  color: var(--accent);
}

.product-badge.sold {
  background: var(--card-bg-active);
  color: var(--text-secondary);
}

.product-stats {
  display: flex;
  background-color: var(--bg-color);
  border-radius: 16px;
  padding: 12px;
  margin-top: 12px;
  justify-content: space-between;
}

.p-stat-item {
  display: flex;
  flex-direction: column;
}

.p-stat-label {
  font-size: 10px;
  text-transform: uppercase;
  color: var(--text-secondary);
  font-weight: 600;
  letter-spacing: 0.5px;
}

.p-stat-value {
  font-size: 15px;
  font-weight: 700;
}

.product-actions {
  display: flex;
  gap: 8px;
}

.product-actions .btn {
  flex: 1;
  border-radius: 14px;
  padding: 10px;
  font-size: 13px;
}

/* --- Leads V7 Redesign --- */
.leads-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
  padding: 0 16px 80px;
}

/* Force 5 columns on large screens */
@media (min-width: 1200px) {
  .leads-grid {
    grid-template-columns: repeat(5, 1fr);
  }
}

.lead-card {
  background-color: var(--card-bg);
  border-radius: 26px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 220px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s, box-shadow 0.2s;
  border: 1px solid transparent;
  position: relative;
}

.lead-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(255, 255, 255, 0.05);
}

.lead-header {
  margin-bottom: 16px;
}

.lead-model {
  font-size: 22px;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.lead-source {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.05);
  padding: 4px 8px;
  border-radius: 6px;
  display: inline-block;
}

.lead-body {
  margin-bottom: 24px;
}

.lead-price {
  font-size: 28px;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -0.5px;
}

.lead-condition {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 4px;
  font-weight: 500;
}

.lead-actions {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 12px;
}

.btn-pass {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  border-radius: 16px;
}

.btn-pass:hover {
  background: rgba(255, 59, 48, 0.1);
  color: var(--danger);
  border-color: var(--danger);
}

.btn-buy {
  background: var(--primary);
  color: white;
  border-radius: 16px;
  box-shadow: 0 4px 12px rgba(10, 132, 255, 0.3);
}

.btn-buy:hover {
  transform: scale(1.02);
}

/* Print Styles for Receipts */
@media print {
  body * {
    visibility: hidden;
  }

  #receipt-container,
  #receipt-container * {
    visibility: visible;
  }

  #receipt-container {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    margin: 0;
    padding: 0;
  }

  .no-print {
    display: none !important;
  }
}

.print-only {
  display: none;
}

@media print {
  .print-only {
    display: block;
  }
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.stat-card {
  padding: var(--spacing-md);
  background: var(--card-bg);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
}

.stat-label {
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
  text-transform: uppercase;
  margin-bottom: 4px;
}

.stat-value {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--text-primary);
}