/**
 * HomeBid - Bootstrap 5.3+ Custom Theme
 *
 * Override variabili CSS Bootstrap per design system premium.
 * Il risultato NON deve sembrare Bootstrap standard.
 *
 * Requirements: 57.1, 57.2, 57.3, 57.4, 57.5, 46.3
 *
 * Palette: Primary #2563eb, Success, Warning, Error, Neutrals
 * Spacing: 4px increments
 * Transitions: fast 150ms, base 200ms, slow 300ms
 * Z-index layers: dropdown, sticky, modal, toast
 * Dark mode: [data-theme="dark"] + user toggle
 */

/* ============================================================
   1. ROOT VARIABLES - Light Theme (Default)
   ============================================================ */
:root {
  /* --- HomeBid Primary - Blu professionale --- */
  --hb-primary-50: #eff6ff;
  --hb-primary-100: #dbeafe;
  --hb-primary-200: #bfdbfe;
  --hb-primary-300: #93c5fd;
  --hb-primary-400: #60a5fa;
  --hb-primary-500: #3b82f6;
  --hb-primary-600: #2563eb;
  --hb-primary-700: #1d4ed8;
  --hb-primary-800: #1e40af;
  --hb-primary-900: #1e3a8a;

  /* --- Bootstrap variable overrides --- */
  --bs-primary: #2563eb;
  --bs-primary-rgb: 37, 99, 235;
  --bs-secondary: #6b7280;
  --bs-secondary-rgb: 107, 114, 128;
  --bs-success: #16a34a;
  --bs-success-rgb: 22, 163, 74;
  --bs-warning: #d97706;
  --bs-warning-rgb: 217, 119, 6;
  --bs-danger: #dc2626;
  --bs-danger-rgb: 220, 38, 38;
  --bs-info: #0891b2;
  --bs-info-rgb: 8, 145, 178;
  --bs-light: #f9fafb;
  --bs-light-rgb: 249, 250, 251;
  --bs-dark: #111827;
  --bs-dark-rgb: 17, 24, 39;

  /* --- Body --- */
  --bs-body-font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --bs-body-font-size: 1rem;
  --bs-body-font-weight: 400;
  --bs-body-line-height: 1.5;
  --bs-body-color: #111827;
  --bs-body-color-rgb: 17, 24, 39;
  --bs-body-bg: #ffffff;
  --bs-body-bg-rgb: 255, 255, 255;

  /* --- Border radius --- */
  --bs-border-radius: 0.75rem;
  --bs-border-radius-sm: 0.5rem;
  --bs-border-radius-lg: 1rem;
  --bs-border-radius-xl: 1.25rem;
  --bs-border-radius-pill: 50rem;

  /* --- Shadows --- */
  --bs-box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
  --bs-box-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --bs-box-shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1), 0 4px 10px rgba(0, 0, 0, 0.05);

  /* --- Success --- */
  --hb-success-50: #f0fdf4;
  --hb-success-100: #dcfce7;
  --hb-success-500: #22c55e;
  --hb-success-600: #16a34a;
  --hb-success-700: #15803d;

  /* --- Warning --- */
  --hb-warning-50: #fffbeb;
  --hb-warning-100: #fef3c7;
  --hb-warning-500: #f59e0b;
  --hb-warning-600: #d97706;
  --hb-warning-700: #b45309;

  /* --- Error --- */
  --hb-error-50: #fef2f2;
  --hb-error-100: #fee2e2;
  --hb-error-500: #ef4444;
  --hb-error-600: #dc2626;
  --hb-error-700: #b91c1c;

  /* --- Neutral / Gray --- */
  --hb-gray-50: #f9fafb;
  --hb-gray-100: #f3f4f6;
  --hb-gray-200: #e5e7eb;
  --hb-gray-300: #d1d5db;
  --hb-gray-400: #9ca3af;
  --hb-gray-500: #6b7280;
  --hb-gray-600: #4b5563;
  --hb-gray-700: #374151;
  --hb-gray-800: #1f2937;
  --hb-gray-900: #111827;

  /* --- Spacing system (4px increments) --- */
  --hb-space-0: 0;
  --hb-space-1: 0.25rem;   /* 4px */
  --hb-space-2: 0.5rem;    /* 8px */
  --hb-space-3: 0.75rem;   /* 12px */
  --hb-space-4: 1rem;      /* 16px */
  --hb-space-5: 1.25rem;   /* 20px */
  --hb-space-6: 1.5rem;    /* 24px */
  --hb-space-8: 2rem;      /* 32px */
  --hb-space-10: 2.5rem;   /* 40px */
  --hb-space-12: 3rem;     /* 48px */
  --hb-space-16: 4rem;     /* 64px */

  /* --- Transitions --- */
  --hb-transition-fast: 150ms ease-out;
  --hb-transition-base: 200ms ease-out;
  --hb-transition-slow: 300ms ease-out;

  /* --- Z-index layers --- */
  --hb-z-dropdown: 100;
  --hb-z-sticky: 200;
  --hb-z-modal: 300;
  --hb-z-toast: 400;

  /* --- Font --- */
  --hb-font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* --- Surface colors (for cards, modals, etc.) --- */
  --hb-surface: #ffffff;
  --hb-surface-raised: #ffffff;
  --hb-border-color: #e5e7eb;
}

/* ============================================================
   2. DARK MODE - [data-theme="dark"]
   ============================================================ */
[data-theme="dark"] {
  --bs-body-bg: #0f172a;
  --bs-body-bg-rgb: 15, 23, 42;
  --bs-body-color: #e2e8f0;
  --bs-body-color-rgb: 226, 232, 240;

  --bs-primary: #3b82f6;
  --bs-primary-rgb: 59, 130, 246;

  --bs-box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
  --bs-box-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
  --bs-box-shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.4);

  --hb-gray-50: #1e293b;
  --hb-gray-100: #334155;
  --hb-gray-200: #475569;
  --hb-gray-300: #64748b;
  --hb-gray-400: #94a3b8;
  --hb-gray-500: #94a3b8;
  --hb-gray-600: #cbd5e1;
  --hb-gray-700: #cbd5e1;
  --hb-gray-800: #e2e8f0;
  --hb-gray-900: #f1f5f9;

  --hb-primary-50: #172554;
  --hb-primary-100: #1e3a8a;

  --hb-surface: #1e293b;
  --hb-surface-raised: #334155;
  --hb-border-color: #334155;

  color-scheme: dark;
}

/* ============================================================
   3. BOOTSTRAP COMPONENT OVERRIDES
   ============================================================ */

/* --- Body --- */
body {
  font-family: var(--bs-body-font-family);
  color: var(--bs-body-color);
  background-color: var(--bs-body-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --- Links --- */
a {
  color: var(--hb-primary-600);
  transition: color var(--hb-transition-fast);
}
a:hover {
  color: var(--hb-primary-700);
}
[data-theme="dark"] a {
  color: var(--hb-primary-400);
}
[data-theme="dark"] a:hover {
  color: var(--hb-primary-300);
}

/* --- Buttons --- */
.btn {
  border-radius: var(--bs-border-radius);
  font-weight: 500;
  transition: all var(--hb-transition-fast);
  padding: 0.5rem 1.25rem;
}

.btn-primary {
  background-color: var(--hb-primary-600);
  border-color: var(--hb-primary-600);
}
.btn-primary:hover {
  background-color: var(--hb-primary-700);
  border-color: var(--hb-primary-700);
  box-shadow: var(--bs-box-shadow-lg);
  transform: translateY(-1px);
}
.btn-primary:active {
  background-color: var(--hb-primary-800);
  border-color: var(--hb-primary-800);
  transform: translateY(0);
  box-shadow: var(--bs-box-shadow);
}

.btn-success {
  background-color: var(--hb-success-600);
  border-color: var(--hb-success-600);
}
.btn-success:hover {
  background-color: var(--hb-success-700);
  border-color: var(--hb-success-700);
}

.btn-warning {
  background-color: var(--hb-warning-600);
  border-color: var(--hb-warning-600);
  color: #fff;
}
.btn-warning:hover {
  background-color: var(--hb-warning-700);
  border-color: var(--hb-warning-700);
  color: #fff;
}

.btn-danger {
  background-color: var(--hb-error-600);
  border-color: var(--hb-error-600);
}
.btn-danger:hover {
  background-color: var(--hb-error-700);
  border-color: var(--hb-error-700);
}

.btn-outline-primary {
  color: var(--hb-primary-600);
  border-color: var(--hb-primary-600);
}
.btn-outline-primary:hover {
  background-color: var(--hb-primary-600);
  border-color: var(--hb-primary-600);
}

.btn-lg {
  padding: 0.75rem 1.5rem;
  font-size: 1.0625rem;
  border-radius: var(--bs-border-radius-lg);
}

.btn-sm {
  padding: 0.375rem 0.875rem;
  font-size: 0.875rem;
  border-radius: var(--bs-border-radius-sm);
}

/* --- Cards --- */
.card {
  border-radius: var(--bs-border-radius-lg);
  border-color: var(--hb-border-color);
  background-color: var(--hb-surface);
  box-shadow: var(--bs-box-shadow-sm);
  transition: transform var(--hb-transition-base), box-shadow var(--hb-transition-base);
}

/* --- Forms --- */
.form-control,
.form-select {
  border-radius: var(--bs-border-radius);
  border-color: var(--hb-gray-300);
  padding: 0.625rem 1rem;
  transition: border-color var(--hb-transition-fast), box-shadow var(--hb-transition-fast);
}
.form-control:focus,
.form-select:focus {
  border-color: var(--hb-primary-500);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}
[data-theme="dark"] .form-control,
[data-theme="dark"] .form-select {
  background-color: var(--hb-gray-50);
  border-color: var(--hb-gray-200);
  color: var(--bs-body-color);
}
[data-theme="dark"] .form-control:focus,
[data-theme="dark"] .form-select:focus {
  border-color: var(--hb-primary-500);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.form-label {
  font-weight: 500;
  font-size: 0.875rem;
  color: var(--hb-gray-700);
  margin-bottom: 0.375rem;
}

/* --- Input group --- */
.input-group-text {
  border-color: var(--hb-gray-300);
  background-color: var(--hb-gray-50);
  border-radius: var(--bs-border-radius);
}
[data-theme="dark"] .input-group-text {
  background-color: var(--hb-gray-100);
  border-color: var(--hb-gray-200);
  color: var(--bs-body-color);
}

/* --- Badges --- */
.badge {
  font-weight: 500;
  border-radius: var(--bs-border-radius-sm);
  padding: 0.35em 0.65em;
}

/* --- Modals --- */
.modal-content {
  border-radius: var(--bs-border-radius-xl);
  border: none;
  box-shadow: var(--bs-box-shadow-lg);
  background-color: var(--hb-surface);
}
.modal-backdrop {
  z-index: calc(var(--hb-z-modal) - 1);
}
.modal {
  z-index: var(--hb-z-modal);
}

/* --- Dropdowns --- */
.dropdown-menu {
  border-radius: var(--bs-border-radius);
  border: 1px solid var(--hb-border-color);
  box-shadow: var(--bs-box-shadow-lg);
  padding: 0.5rem;
  z-index: var(--hb-z-dropdown);
  background-color: var(--hb-surface);
}
.dropdown-item {
  border-radius: var(--bs-border-radius-sm);
  padding: 0.5rem 0.75rem;
  transition: background-color var(--hb-transition-fast);
}
.dropdown-item:hover {
  background-color: var(--hb-gray-50);
}
[data-theme="dark"] .dropdown-item:hover {
  background-color: var(--hb-gray-100);
}

/* --- Navbar --- */
.navbar {
  z-index: var(--hb-z-sticky);
}

/* --- Toasts --- */
.toast-container {
  z-index: var(--hb-z-toast);
}

/* --- Alerts --- */
.alert {
  border-radius: var(--bs-border-radius);
  border: none;
}

/* --- Nav tabs/pills --- */
.nav-link {
  border-radius: var(--bs-border-radius-sm);
  transition: color var(--hb-transition-fast), background-color var(--hb-transition-fast);
}

/* --- Progress bar --- */
.progress {
  border-radius: var(--bs-border-radius-pill);
  height: 0.375rem;
  background-color: var(--hb-gray-100);
}
.progress-bar {
  background-color: var(--hb-primary-600);
}

/* --- Tables --- */
.table {
  --bs-table-bg: transparent;
}
[data-theme="dark"] .table {
  --bs-table-color: var(--bs-body-color);
  --bs-table-striped-bg: var(--hb-gray-50);
  --bs-table-hover-bg: var(--hb-gray-100);
}

/* ============================================================
   4. UTILITY OVERRIDES
   ============================================================ */

/* Text muted override for better contrast */
.text-muted {
  color: var(--hb-gray-500) !important;
}
[data-theme="dark"] .text-muted {
  color: var(--hb-gray-400) !important;
}

/* Shadow utilities */
.shadow-sm { box-shadow: var(--bs-box-shadow-sm) !important; }
.shadow    { box-shadow: var(--bs-box-shadow) !important; }
.shadow-lg { box-shadow: var(--bs-box-shadow-lg) !important; }

/* Border color */
.border {
  border-color: var(--hb-border-color) !important;
}

/* ============================================================
   5. REDUCED MOTION
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  .btn,
  .card,
  .form-control,
  .form-select,
  a {
    transition: none !important;
  }
  .btn:hover {
    transform: none !important;
  }
}