/* ============================================
   AgriTech AI — Design System
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
  --primary: #2563eb;
  --primary-light: #3b82f6;
  --primary-dark: #1d4ed8;
  --primary-subtle: #dbeafe;
  --secondary: #0d9488;
  --secondary-light: #14b8a6;
  --secondary-dark: #0f766e;
  --accent: #f59e0b;
  --accent-light: #fbbf24;
  --danger: #ef4444;
  --success: #22c55e;
  --info: #06b6d4;

  --bg: #f0f5ff;
  --surface: #ffffff;
  --surface-alt: #f8fafc;
  --surface-hover: #f1f5f9;
  --text: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.04);
  --shadow: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md: 0 4px 6px rgba(0,0,0,.05), 0 2px 4px rgba(0,0,0,.04);
  --shadow-lg: 0 10px 15px rgba(0,0,0,.06), 0 4px 6px rgba(0,0,0,.04);
  --shadow-xl: 0 20px 25px rgba(0,0,0,.08), 0 8px 10px rgba(0,0,0,.04);

  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --transition: .2s ease;
  --transition-slow: .35s ease;

  /* Legacy aliases used by templates */
  --agri-green: var(--secondary);
  --bg-card: var(--surface);
  --bg-card-alt: var(--surface-alt);
  --text-primary: var(--text);
  --border-color: var(--border);
  --warning: var(--accent);
}

[data-theme="dark"] {
  --primary: #3b82f6;
  --primary-light: #60a5fa;
  --primary-dark: #2563eb;
  --primary-subtle: #1e3a5f;
  --secondary: #14b8a6;
  --secondary-light: #2dd4bf;
  --secondary-dark: #0d9488;
  --accent: #fbbf24;
  --accent-light: #fcd34d;

  --bg: #0f172a;
  --surface: #1e293b;
  --surface-alt: #1a2332;
  --surface-hover: #334155;
  --text: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;
  --border: #334155;
  --border-light: #1e293b;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.2);
  --shadow: 0 1px 3px rgba(0,0,0,.3);
  --shadow-md: 0 4px 6px rgba(0,0,0,.3);
  --shadow-lg: 0 10px 15px rgba(0,0,0,.3);
  --shadow-xl: 0 20px 25px rgba(0,0,0,.4);

  /* Legacy aliases */
  --agri-green: var(--secondary);
  --bg-card: var(--surface);
  --bg-card-alt: var(--surface-alt);
  --text-primary: var(--text);
  --border-color: var(--border);
  --warning: var(--accent);
}

/* --- Base --- */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  transition: background var(--transition-slow), color var(--transition-slow);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Smooth page-in animation */
body.page-loaded { animation: fadeIn .4s ease forwards; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

/* --- Scrollbar --- */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--text-muted); border-radius: var(--radius-full); }
::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.25; color: var(--text); }
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-dark); }
.text-muted { color: var(--text-muted) !important; }

/* --- Navbar --- */
.navbar-agri {
  background: linear-gradient(135deg, var(--surface), var(--surface-alt)) !important;
  backdrop-filter: blur(20px) saturate(1.8);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: background var(--transition-slow), border-color var(--transition-slow);
}
.navbar-agri .navbar-brand {
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: 1.25rem;
  letter-spacing: -.5px;
}
.navbar-agri .nav-link {
  color: var(--text-secondary) !important;
  font-weight: 500;
  padding: .5rem 1rem !important;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  position: relative;
}
.navbar-agri .nav-link:hover,
.navbar-agri .nav-link.active {
  color: var(--primary) !important;
  background: var(--primary-subtle);
}
.navbar-agri .nav-link::after {
  content: '';
  position: absolute;
  bottom: 2px; left: 50%;
  width: 0; height: 2px;
  background: var(--primary);
  border-radius: var(--radius-full);
  transition: all var(--transition);
  transform: translateX(-50%);
}
.navbar-agri .nav-link:hover::after,
.navbar-agri .nav-link.active::after { width: 60%; }

/* --- Dark Mode Toggle --- */
.theme-toggle {
  background: none; border: none; cursor: pointer;
  width: 38px; height: 38px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  transition: all var(--transition);
  font-size: 1.15rem;
}
.theme-toggle:hover {
  background: var(--surface-hover);
  color: var(--primary);
  transform: rotate(15deg);
}

/* --- Buttons --- */
.btn-agri {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .6rem 1.5rem;
  font-weight: 600; font-size: .9rem;
  border: none; border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}
.btn-agri:active { transform: scale(.96); }
.btn-agri-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  box-shadow: 0 4px 12px rgba(37,99,235,.3);
}
.btn-agri-primary:hover { box-shadow: 0 6px 20px rgba(37,99,235,.4); transform: translateY(-1px); color: #fff; }
.btn-agri-secondary {
  background: linear-gradient(135deg, var(--secondary), var(--secondary-dark));
  color: #fff;
  box-shadow: 0 4px 12px rgba(13,148,136,.3);
}
.btn-agri-secondary:hover { box-shadow: 0 6px 20px rgba(13,148,136,.4); transform: translateY(-1px); color: #fff; }
.btn-agri-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}
.btn-agri-outline:hover { background: var(--primary-subtle); transform: translateY(-1px); }
.btn-agri-ghost {
  background: transparent;
  color: var(--text-secondary);
}
.btn-agri-ghost:hover { background: var(--surface-hover); color: var(--text); }
.btn-agri-danger {
  background: linear-gradient(135deg, var(--danger), #dc2626);
  color: #fff;
  box-shadow: 0 4px 12px rgba(239,68,68,.3);
}
.btn-agri-sm { padding: .4rem 1rem; font-size: .8rem; }
.btn-agri-lg { padding: .8rem 2rem; font-size: 1rem; }

/* --- Cards --- */
.card-agri {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: all var(--transition);
  padding: 1.5rem;
}
.card-agri:hover { box-shadow: var(--shadow-md); }
.card-agri-primary {
  border-left: 4px solid var(--primary);
}
.card-agri-hover {
  cursor: pointer;
}
.card-agri-hover:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-light);
}
.card-agri-header {
  padding: 1.25rem 1.5rem;
  margin: -1.5rem -1.5rem 1rem -1.5rem;
  border-bottom: 1px solid var(--border);
  font-weight: 700;
  display: flex; align-items: center; justify-content: space-between;
}
.card-agri-body { padding: 0; }

/* --- Form Styles --- */
.form-agri { width: 100%; }
.form-agri .form-label {
  font-weight: 600; font-size: .85rem;
  color: var(--text-secondary);
  margin-bottom: .4rem;
}
.form-agri .form-control,
.form-agri .form-select {
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  padding: .65rem 1rem;
  font-size: .9rem;
  transition: all var(--transition);
  width: 100%;
}
.form-agri .form-control:focus,
.form-agri .form-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-subtle);
  outline: none;
}
.form-agri .form-control::placeholder { color: var(--text-muted); }

/* --- Tables --- */
.table-agri {
  width: 100%;
  border-collapse: collapse;
  font-size: .88rem;
}
.table-agri th {
  padding: .75rem 1rem;
  text-align: left;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  font-size: .73rem;
  letter-spacing: .5px;
  border-bottom: 2px solid var(--border);
  background: var(--surface-alt);
}
.table-agri td {
  padding: .75rem 1rem;
  border-bottom: 1px solid var(--border-light);
  vertical-align: middle;
}
.table-agri tbody tr { transition: background var(--transition); }
.table-agri tbody tr:hover { background: var(--surface-hover); }

/* --- Badges --- */
.badge-agri {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  padding: .25rem .75rem;
  border-radius: var(--radius-full);
  font-size: .75rem;
  font-weight: 600;
}
.badge-agri-success { background: #dcfce7; color: #166534; }
.badge-agri-warning { background: #fef3c7; color: #92400e; }
.badge-agri-danger { background: #fee2e2; color: #991b1b; }
.badge-agri-info { background: #dbeafe; color: #1e40af; }
[data-theme="dark"] .badge-agri-success { background: #14532d; color: #86efac; }
[data-theme="dark"] .badge-agri-warning { background: #78350f; color: #fcd34d; }
[data-theme="dark"] .badge-agri-danger { background: #7f1d1d; color: #fca5a5; }
[data-theme="dark"] .badge-agri-info { background: #1e3a5f; color: #93c5fd; }

/* --- Modal --- */
.modal-agri .modal-content {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
}
.modal-agri .modal-header {
  border-bottom-color: var(--border);
  padding: 1.25rem 1.5rem;
}
.modal-agri .modal-footer { border-top-color: var(--border); padding: 1rem 1.5rem; }
.modal-agri .modal-title { font-weight: 700; }
.modal-agri .btn-close { filter: none; }

/* --- Pagination --- */
.pagination-agri { display: flex; align-items: center; gap: .3rem; }
.pagination-agri .page-link {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 36px; height: 36px;
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-weight: 500; font-size: .85rem;
  transition: all var(--transition);
  text-decoration: none;
}
.pagination-agri .page-link:hover {
  background: var(--surface-hover);
  border-color: var(--primary);
  color: var(--primary);
}
.pagination-agri .page-item.active .page-link {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(37,99,235,.3);
}
.pagination-agri .page-item.disabled .page-link {
  opacity: .4; pointer-events: none;
}

/* --- Upload Zone (Drop area) --- */
.upload-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  background: var(--surface-alt);
  position: relative;
}
.upload-zone:hover,
.upload-zone.dragover {
  border-color: var(--primary);
  background: var(--primary-subtle);
}
.upload-zone-icon { font-size: 3rem; margin-bottom: .5rem; opacity: .5; }
.upload-zone-text { font-weight: 600; color: var(--text-secondary); }
.upload-zone-hint { font-size: .8rem; color: var(--text-muted); margin-top: .25rem; }
.upload-zone input[type="file"] {
  position: absolute; inset: 0; opacity: 0; cursor: pointer;
}

/* --- Auth Pages --- */
.auth-page {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--bg) 0%, var(--primary-subtle) 100%);
  padding: 2rem 1rem;
}
.auth-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  padding: 2.5rem;
  width: 100%;
  max-width: 420px;
  animation: slideUp .4s ease;
}
@keyframes slideUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
.auth-card .auth-brand {
  text-align: center;
  margin-bottom: 1.5rem;
}
.auth-card .auth-brand h2 {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 800;
}
.auth-card .auth-divider {
  text-align: center;
  color: var(--text-muted);
  font-size: .8rem;
  margin: 1rem 0;
  position: relative;
}
.auth-card .auth-divider::before,
.auth-card .auth-divider::after {
  content: '';
  position: absolute;
  top: 50%; width: 40%; height: 1px;
  background: var(--border);
}
.auth-card .auth-divider::before { left: 0; }
.auth-card .auth-divider::after { right: 0; }

/* --- Admin --- */
.admin-layout {
  display: flex; min-height: 100vh;
}
.admin-sidebar {
  width: 260px;
  background: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
  color: #cbd5e1;
  position: fixed; top: 0; left: 0;
  height: 100vh; z-index: 1000;
  display: flex; flex-direction: column;
  transition: transform var(--transition-slow);
}
.admin-sidebar-brand {
  padding: 1.25rem 1.5rem;
  font-weight: 800; font-size: 1.1rem;
  border-bottom: 1px solid rgba(255,255,255,.08);
  background: linear-gradient(135deg, #3b82f6, #14b8a6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.admin-sidebar-nav { flex: 1; padding: .75rem 0; overflow-y: auto; }
.admin-sidebar-nav a {
  display: flex; align-items: center; gap: .75rem;
  padding: .65rem 1.5rem;
  color: rgba(255,255,255,.6);
  text-decoration: none; font-size: .88rem;
  transition: all var(--transition);
  border-left: 3px solid transparent;
}
.admin-sidebar-nav a:hover { color: #fff; background: rgba(255,255,255,.06); }
.admin-sidebar-nav a.active {
  color: #fff;
  background: rgba(59,130,246,.15);
  border-left-color: #3b82f6;
}
.admin-sidebar-nav hr {
  border-color: rgba(255,255,255,.08);
  margin: .75rem 1.5rem;
}
.admin-main { margin-left: 260px; flex: 1; min-width: 0; }
.admin-topbar {
  background: var(--surface);
  padding: .85rem 1.5rem;
  display: flex; align-items: center; justify-content: space-between;
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 999;
  transition: background var(--transition-slow);
}
.admin-content { padding: 1.5rem; }
.admin-stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--primary);
  transition: all var(--transition);
}
.admin-stat-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.admin-stat-card .stat-value { font-size: 1.75rem; font-weight: 700; line-height: 1.2; color: var(--text); }
.admin-stat-card .stat-label { font-size: .78rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: .5px; }
.admin-stat-card.danger { border-left-color: var(--danger); }
.admin-stat-card.warning { border-left-color: var(--accent); }
.admin-stat-card.info { border-left-color: var(--info); }
.admin-stat-card.secondary { border-left-color: var(--text-muted); }
.admin-stat-card.purple { border-left-color: #8b5cf6; }
.admin-stat-card .stat-value.gradient-blue { background: linear-gradient(135deg, var(--primary), var(--primary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.admin-stat-card .stat-value.gradient-teal { background: linear-gradient(135deg, var(--secondary), var(--secondary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }

/* Image thumb */
.thumb-img { width: 48px; height: 48px; object-fit: cover; border-radius: var(--radius-sm); }

/* Filter bar */
.filter-bar { display: flex; gap: .5rem; align-items: center; flex-wrap: wrap; margin-bottom: 1rem; }

/* Empty state */
.empty-state { text-align: center; padding: 3rem 1rem; color: var(--text-muted); }
.empty-state .icon { font-size: 3rem; margin-bottom: .5rem; }

/* Alert / Messages */
.alert-agri {
  padding: .85rem 1.25rem;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-size: .88rem;
}
.alert-agri-success { background: #dcfce7; border-color: #bbf7d0; color: #166534; }
.alert-agri-danger { background: #fee2e2; border-color: #fecaca; color: #991b1b; }
.alert-agri-warning { background: #fef3c7; border-color: #fde68a; color: #92400e; }
.alert-agri-info { background: #dbeafe; border-color: #bfdbfe; color: #1e40af; }
[data-theme="dark"] .alert-agri-success { background: #14532d; border-color: #166534; color: #86efac; }
[data-theme="dark"] .alert-agri-danger { background: #7f1d1d; border-color: #991b1b; color: #fca5a5; }
[data-theme="dark"] .alert-agri-warning { background: #78350f; border-color: #92400e; color: #fcd34d; }
[data-theme="dark"] .alert-agri-info { background: #1e3a5f; border-color: #1e40af; color: #93c5fd; }

/* --- Utilities --- */
.gradient-text {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.fade-in { animation: fadeIn .4s ease forwards; }
.delay-1 { animation-delay: .1s; }
.delay-2 { animation-delay: .2s; }
.delay-3 { animation-delay: .3s; }

/* ── Responsive ────────────────────────────── */

/* Safe area & tap highlight */
body {
  padding-bottom: env(safe-area-inset-bottom);
}
.navbar-agri {
  padding-top: max(0.5rem, env(safe-area-inset-top));
}
* {
  -webkit-tap-highlight-color: transparent;
}

/* Touch target minimums (WCAG 44x44) */
.theme-toggle,
.navbar-toggler,
.page-link,
.pagination-agri .page-link {
  min-width: 44px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.nav-link.position-relative {
  min-width: 44px;
  min-height: 44px;
}

/* Responsive typography */
h1 { font-size: clamp(2rem, 5vw, 4rem); }
h2 { font-size: clamp(1.5rem, 4vw, 3rem); }
h3 { font-size: clamp(1.25rem, 3vw, 2rem); }
h4 { font-size: clamp(1.1rem, 2.5vw, 1.5rem); }
h5 { font-size: clamp(1rem, 2vw, 1.25rem); }
.section-title { font-size: clamp(1.5rem, 4vw, 2.5rem); }
body { font-size: clamp(0.9rem, 2.5vw, 1rem); }

/* Phones: <576px */
@media (max-width: 576px) {
  .auth-card { padding: 1.25rem; }
  .card-agri { padding: 1rem !important; }
  .container { padding-left: 0.75rem; padding-right: 0.75rem; }
  .pagination-agri .page-link { padding: 0.4rem 0.65rem; font-size: 0.85rem; }
  .list-group-item { padding: 0.6rem 0; }
}

/* Tablets & small screens: <768px */
@media (max-width: 768px) {
  .admin-sidebar { transform: translateX(-100%); }
  .admin-sidebar.show { transform: translateX(0); }
  .admin-main { margin-left: 0; }
  .auth-card { padding: 1.5rem; }
  .hero h1 { font-size: 2.5rem; }
  .section-title { font-size: 2rem; }
  .step-connector { display: none; }
  .d-flex.gap-2.flex-wrap { gap: 0.4rem !important; }
}

/* Small desktops: <992px */
@media (max-width: 992px) {
  .navbar-nav .nav-link { padding: 0.5rem 0; }
}

/* Touch devices: kill sticky hover */
@media (hover: none) and (pointer: coarse) {
  .search-card:hover { transform: none; border-color: transparent; }
  .card-agri-hover:hover { transform: none; }
  .btn-agri:hover { transform: none; }
  .theme-toggle:hover { transform: none; background: none; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .fade-in { animation: none; }
  *, *::before, *::after { transition-duration: 0.01ms !important; }
}