/* ==========================================================================
   PODEUM DESIGN SYSTEM — TRUST-FIRST MODERN MARKETPLACE (LIGHT/CLEAN THEME)
   ========================================================================== */

:root {
  /* Color Palette - Core Canvas & Surfaces */
  --bg-canvas: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-raised: #ffffff;
  --bg-subtle: #f1f5f9;
  --bg-muted: #e2e8f0;
  --bg-input: #ffffff;
  --bg-input-focus: #ffffff;
  --bg-overlay: rgba(15, 23, 42, 0.6);

  /* Primary Brand — Trust Navy & Deep Blue */
  --primary-50: #eff6ff;
  --primary-100: #dbeafe;
  --primary-200: #bfdbfe;
  --primary-500: #3b82f6;
  --primary-600: #2563eb;
  --primary-700: #1d4ed8;
  --primary-800: #1e40af;
  --primary-900: #0f172a;
  --primary-focus-ring: rgba(37, 99, 235, 0.2);

  /* Semantic - Trust Success / Verified */
  --success-50: #ecfdf5;
  --success-100: #d1fae5;
  --success-500: #10b981;
  --success-600: #059669;
  --success-700: #047857;
  --success-border: #a7f3d0;
  --success-focus-ring: rgba(16, 185, 129, 0.2);

  /* Semantic - Warning / Escrow Hold / Live Auction */
  --warning-50: #fffbeb;
  --warning-100: #fef3c7;
  --warning-500: #f59e0b;
  --warning-600: #d97706;
  --warning-700: #b45309;
  --warning-border: #fde68a;

  /* Semantic - Error / Flagged Stolen / Dispute */
  --danger-50: #fef2f2;
  --danger-100: #fee2e2;
  --danger-500: #ef4444;
  --danger-600: #dc2626;
  --danger-700: #b91c1c;
  --danger-border: #fecaca;

  /* Typography Colors */
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-tertiary: #94a3b8;
  --text-inverse: #ffffff;
  --text-link: #2563eb;

  /* Borders & Dividers */
  --border-subtle: #e2e8f0;
  --border-medium: #cbd5e1;
  --border-strong: #94a3b8;
  --border-focus: #2563eb;

  /* Shadows & Elevations (Clean, Soft & Modern) */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.07), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px -1px rgba(0, 0, 0, 0.08), 0 2px 6px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 25px -3px rgba(0, 0, 0, 0.1), 0 4px 10px -2px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 35px -5px rgba(0, 0, 0, 0.12), 0 8px 16px -4px rgba(0, 0, 0, 0.04);

  /* Typography Scale */
  --font-family-base: 'Plus Jakarta Sans', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-family-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;

  /* Layout & Sizing */
  --header-height: 68px;
  --header-mobile-search: 52px;
  --bottom-nav-height: 64px;
  --max-content-width: 1280px;
  --measure-readable: 68ch;

  /* Spacing scale */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  
  /* Radii */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Reset & Base Setup */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html {
  font-size: 16px;
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  font-family: var(--font-family-base);
  height: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-size-adjust: 100%;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  min-height: 100%;
  width: 100%;
  margin: 0 auto;
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  display: flex;
  flex-direction: column;
  align-items: stretch;
  overflow-x: clip;
}

/* Typography Hierarchy */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  line-height: 1.25;
}

h1 { font-size: 1.85rem; }
h2 { font-size: 1.45rem; }
h3 { font-size: 1.15rem; }
h4 { font-size: 0.95rem; font-weight: 600; }

@media (min-width: 768px) {
  h1 { font-size: 2.25rem; }
  h2 { font-size: 1.75rem; }
  h3 { font-size: 1.3rem; }
  h4 { font-size: 1.05rem; }
}

p, span, label, div {
  font-size: 0.9rem;
  line-height: 1.5;
}

.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }
.text-primary { color: var(--text-primary); }
.text-success { color: var(--success-600); }
.text-warning { color: var(--warning-600); }
.text-danger { color: var(--danger-600); }

/* Card & Surface Primitives */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-normal), border-color var(--transition-normal), transform var(--transition-normal);
}

.card-hoverable:hover {
  border-color: var(--border-medium);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.surface-subtle {
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
}

/* Standardized Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.15rem;
  font-size: 0.88rem;
  font-weight: 600;
  font-family: inherit;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  line-height: 1.2;
  white-space: nowrap;
}

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

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

.btn-primary {
  background: var(--primary-600);
  color: #ffffff;
  box-shadow: 0 1px 2px rgba(37, 99, 235, 0.2);
}

.btn-primary:hover:not(:disabled) {
  background: var(--primary-700);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

.btn-success {
  background: var(--success-600);
  color: #ffffff;
  box-shadow: 0 1px 2px rgba(5, 150, 105, 0.2);
}

.btn-success:hover:not(:disabled) {
  background: var(--success-700);
  box-shadow: 0 4px 12px rgba(5, 150, 105, 0.25);
}

.btn-secondary {
  background: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-medium);
  box-shadow: var(--shadow-xs);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--bg-subtle);
  border-color: var(--border-strong);
}

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

.btn-ghost:hover:not(:disabled) {
  background: var(--bg-subtle);
  color: var(--text-primary);
}

.btn-danger {
  background: var(--danger-50);
  color: var(--danger-600);
  border: 1px solid var(--danger-border);
}

.btn-danger:hover:not(:disabled) {
  background: var(--danger-100);
  color: var(--danger-700);
}

.btn-block {
  width: 100%;
}

.btn-sm {
  padding: 0.45rem 0.75rem;
  font-size: 0.8rem;
  border-radius: var(--radius-xs);
}

.btn-lg {
  padding: 0.85rem 1.6rem;
  font-size: 1rem;
  border-radius: var(--radius-sm);
}

/* Badges & Trust Pills */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.25rem 0.55rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  border-radius: var(--radius-full);
  line-height: 1;
}

.badge-trust, .badge-verified {
  background: var(--success-50);
  color: var(--success-700);
  border: 1px solid var(--success-border);
}

.badge-primary, .badge-info {
  background: var(--primary-50);
  color: var(--primary-700);
  border: 1px solid var(--primary-100);
}

.badge-warning, .badge-escrow {
  background: var(--warning-50);
  color: var(--warning-700);
  border: 1px solid var(--warning-border);
}

.badge-danger, .badge-stolen {
  background: var(--danger-50);
  color: var(--danger-700);
  border: 1px solid var(--danger-border);
}

.badge-neutral, .badge-secondary {
  background: var(--bg-subtle);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
}

/* TrustPill — icon + label + tone (a11y: not color-only) */
.trust-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.65rem;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  line-height: 1.2;
  white-space: nowrap;
}

.trust-pill--sm {
  padding: 0.2rem 0.5rem;
  font-size: 0.68rem;
}

.trust-pill__icon {
  font-size: 0.85em;
  font-weight: 800;
}

.trust-pill--verified {
  background: var(--success-50);
  color: var(--success-700);
  border-color: var(--success-border);
}

.trust-pill--pending {
  background: var(--warning-50);
  color: var(--warning-700);
  border-color: var(--warning-border);
}

.trust-pill--failed,
.trust-pill--stolen {
  background: var(--danger-50);
  color: var(--danger-700);
  border-color: var(--danger-border);
}

.trust-pill--protected {
  background: var(--primary-50);
  color: var(--primary-800);
  border-color: var(--primary-200);
}

.trust-pill--restricted,
.trust-pill--unavailable {
  background: var(--bg-subtle);
  color: var(--text-secondary);
  border-color: var(--border-medium);
}

/* Form Elements */
.form-group {
  margin-bottom: 1.15rem;
}

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

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 0.75rem 0.95rem;
  background: var(--bg-input);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.92rem;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--primary-focus-ring);
}

.form-input::placeholder, .form-textarea::placeholder {
  color: var(--text-tertiary);
}

/* Trust Card Highlight Container */
.trust-banner {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  color: #ffffff;
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.trust-banner h1, .trust-banner h2, .trust-banner h3 {
  color: #ffffff;
}

.trust-banner p, .trust-banner span {
  color: #94a3b8;
}

/* Feedback Alerts */
.alert {
  padding: 0.85rem 1.1rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  line-height: 1.45;
}

.alert-info {
  background: var(--primary-50);
  border: 1px solid var(--primary-100);
  color: var(--primary-800);
}

.alert-success {
  background: var(--success-50);
  border: 1px solid var(--success-border);
  color: var(--success-700);
}

.alert-warning {
  background: var(--warning-50);
  border: 1px solid var(--warning-border);
  color: var(--warning-700);
}

.alert-danger {
  background: var(--danger-50);
  border: 1px solid var(--danger-border);
  color: var(--danger-700);
}

.alert-title {
  font-weight: 700;
  margin-bottom: 0.15rem;
}

.alert-body {
  font-size: 0.82rem;
  opacity: 0.95;
}

/* Skeleton Loading State */
.skeleton {
  background: linear-gradient(90deg, #f1f5f9 25%, #e2e8f0 50%, #f1f5f9 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-xs);
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Empty State Primitive */
.empty-state {
  text-align: center;
  padding: var(--space-7) var(--space-5);
  background: var(--bg-surface);
  border: 1px dashed var(--border-medium);
  border-radius: var(--radius-md);
}

.empty-state-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto var(--space-4) auto;
  border-radius: 50%;
  background: var(--bg-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-muted);
}

.empty-state-message {
  margin-top: var(--space-2);
  max-width: 28rem;
  margin-left: auto;
  margin-right: auto;
}

.ui-skeleton-card {
  border: 1px solid var(--border-subtle);
}