/* Pantry Plus - Mobile-First CSS
 * Pattern: book-library (topbar + bottom nav, no sidebar)
 */

:root {
  --bg-body: #f8f9fa;
  --bg-card: #ffffff;
  --bg-nav: #ffffff;
  --bg-input: #ffffff;
  --text-primary: #212529;
  --text-secondary: #6c757d;
  --text-muted: #adb5bd;
  --border-color: #dee2e6;
  --accent: #2d6a4f;
  --accent-hover: #40916c;
  --accent-soft: #d8f3dc;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --topbar-height: 56px;
  --bottomnav-height: 64px;
  --transition-fast: 0.15s ease;
  --transition-normal: 0.2s ease;
}

[data-theme="dark"] {
  --bg-body: #1a1d21;
  --bg-card: #2b3035;
  --bg-nav: #212529;
  --bg-input: #2b3035;
  --text-primary: #dee2e6;
  --text-secondary: #adb5bd;
  --text-muted: #6c757d;
  --border-color: #343a40;
  --accent: #52b788;
  --accent-hover: #74c69d;
  --accent-soft: #1b4332;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.3);
}

/* ====== Base ====== */
body {
  background: var(--bg-body);
  color: var(--text-primary);
  padding-top: var(--topbar-height);
  padding-bottom: calc(var(--bottomnav-height) + 16px);
  font-family: system-ui, -apple-system, sans-serif;
}

/* ====== Top Bar ====== */
.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--topbar-height);
  background: var(--bg-nav);
  border-bottom: 1px solid var(--border-color);
  z-index: 1030;
  display: flex;
  align-items: center;
  padding: 0 16px;
  box-shadow: var(--shadow-sm);
}

/* ====== Bottom Navigation ====== */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--bottomnav-height);
  background: var(--bg-nav);
  border-top: 1px solid var(--border-color);
  z-index: 1030;
  display: flex;
  justify-content: space-around;
  align-items: center;
  padding: 4px 0;
  box-shadow: 0 -1px 3px rgba(0,0,0,0.08);
}

.bottom-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 11px;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
  cursor: pointer;
}

.bottom-nav-item:hover,
.bottom-nav-item:focus {
  color: var(--accent);
  text-decoration: none;
}

.bottom-nav-item.active {
  color: var(--accent);
  font-weight: 600;
}

.bottom-nav-item .nav-icon {
  font-size: 1.25rem;
  line-height: 1;
}

/* Scan button (prominent center button) */
.nav-scan-btn {
  background: var(--accent) !important;
  color: #fff !important;
  border: none;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  margin-top: -12px;
  box-shadow: 0 2px 8px rgba(45, 106, 79, 0.3);
  transition: var(--transition-fast);
}

.nav-scan-btn:hover {
  background: var(--accent-hover) !important;
  transform: scale(1.05);
}

.nav-scan-btn.active {
  background: var(--accent-hover) !important;
}

/* ====== Page Sections ====== */
.page-section {
  display: none;
}

.page-section.active {
  display: block;
}

/* ====== Cards ====== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

/* ====== Stats Cards (Dashboard) ====== */
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.stat-card .stat-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.2;
}

.stat-card .stat-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: 0.25rem;
}

/* ====== Progress Bars ====== */
.progress {
  height: 8px;
  border-radius: 4px;
  background: var(--border-color);
}

.progress-bar {
  background: var(--accent);
  border-radius: 4px;
}

.progress-bar.bg-warning {
  background: #ffc107 !important;
}

.progress-bar.bg-danger {
  background: #dc3545 !important;
}

.progress-bar.bg-success {
  background: var(--accent) !important;
}

/* ====== List Items ====== */
.list-item {
  display: flex;
  align-items: center;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-color);
  gap: 0.75rem;
  transition: var(--transition-fast);
}

.list-item:last-child {
  border-bottom: none;
}

.list-item:active {
  background: var(--accent-soft);
}

/* ====== Search Bar ====== */
.search-bar {
  position: sticky;
  top: var(--topbar-height);
  background: var(--bg-body);
  padding: 0.75rem 0;
  z-index: 100;
}

.search-input {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 0.5rem 1rem 0.5rem 2.5rem;
}

/* ====== Badges ====== */
.badge-accent {
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 600;
}

/* ====== Floating Action Button (for quick add) ====== */
.fab {
  position: fixed;
  bottom: calc(var(--bottomnav-height) + 16px);
  right: 16px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  border: none;
  box-shadow: 0 4px 12px rgba(45, 106, 79, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  z-index: 1020;
  transition: var(--transition-fast);
}

.fab:hover {
  background: var(--accent-hover);
  transform: scale(1.05);
}

/* ====== Toast ====== */
.toast {
  border-radius: var(--radius-md);
}

/* ====== Form Controls ====== */
.form-control,
.form-select {
  background: var(--bg-input);
  color: var(--text-primary);
  border-color: var(--border-color);
}

.form-control:focus,
.form-select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 0.2rem rgba(45, 106, 79, 0.15);
}

/* ====== Dropdown ====== */
.dropdown-menu {
  background: var(--bg-card);
  border-color: var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}

.dropdown-item {
  color: var(--text-primary);
  padding: 0.5rem 1rem;
}

.dropdown-item:hover,
.dropdown-item:focus {
  background: var(--accent-soft);
  color: var(--accent);
}

.dropdown-header {
  color: var(--text-secondary);
}

/* ====== Empty States ====== */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-secondary);
}

.empty-state .empty-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  opacity: 0.5;
}

/* ====== Scroll to Top ====== */
.scroll-top-btn {
  position: fixed;
  bottom: calc(var(--bottomnav-height) + 80px);
  right: 16px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1010;
  box-shadow: var(--shadow-sm);
  cursor: pointer;
}

.scroll-top-btn.visible {
  display: flex;
}

/* ====== Responsive adjustments ====== */
@media (min-width: 768px) {
  main.container-fluid {
    max-width: 720px;
    margin: 0 auto;
  }
}

@media (min-width: 992px) {
  main.container-fluid {
    max-width: 900px;
  }
}

/* ====== Dark mode overrides ====== */
[data-theme="dark"] .topbar,
[data-theme="dark"] .bottom-nav {
  background: var(--bg-nav);
  border-color: var(--border-color);
}

[data-theme="dark"] .search-bar {
  background: var(--bg-body);
}

[data-theme="dark"] .nav-scan-btn {
  box-shadow: 0 2px 8px rgba(82, 183, 136, 0.3);
}

[data-theme="dark"] body {
  background: var(--bg-body);
  color: var(--text-primary);
}