/* ================================================================
   ADMIN PANEL — Design System
   Consolidated from per-page inline styles → single source of truth
   ================================================================ */

/* ── 1. Design Tokens ──────────────────────────────────────────── */
:root {
  /* Brand */
  --primary:          #ff6600;
  --primary-hover:    #ff8533;
  --primary-dark:     #cc5200;
  --primary-glow:     rgba(255, 102, 0, 0.45);
  --primary-subtle:   rgba(255, 102, 0, 0.08);
  --primary-border:   rgba(255, 102, 0, 0.25);

  /* Backgrounds */
  --bg-body:          #050505;
  --bg-sidebar:       #0d0d0d;
  --bg-card:          #111111;
  --bg-card-hover:    #181818;
  --bg-header:        rgba(13, 13, 13, 0.95);
  --bg-input:         #0d0d0d;
  --bg-modal:         #161616;
  --bg-overlay:       rgba(0, 0, 0, 0.75);

  /* Borders */
  --border:           #222222;
  --border-light:     #2a2a2a;
  --border-focus:     var(--primary);

  /* Text */
  --text-main:        #f0f0f0;
  --text-muted:       #999999;   /* raised from #888 for better contrast */
  --text-dim:         #666666;
  --text-inverse:     #000000;

  /* Semantic */
  --success:          #00e676;
  --success-bg:       rgba(0, 230, 118, 0.08);
  --success-border:   rgba(0, 230, 118, 0.25);
  --danger:           #ff2950;
  --danger-bg:        rgba(255, 41, 80, 0.08);
  --danger-border:    rgba(255, 41, 80, 0.25);
  --warning:          #ffb300;
  --warning-bg:       rgba(255, 179, 0, 0.08);
  --warning-border:   rgba(255, 179, 0, 0.25);
  --info:             #29b6f6;
  --info-bg:          rgba(41, 182, 246, 0.08);
  --info-border:      rgba(41, 182, 246, 0.25);

  /* Spacing scale */
  --sp-1:  4px;
  --sp-2:  8px;
  --sp-3:  12px;
  --sp-4:  16px;
  --sp-5:  20px;
  --sp-6:  24px;
  --sp-8:  32px;
  --sp-10: 40px;
  --sp-12: 48px;

  /* Radii */
  --radius-sm: 6px;
  --radius:    10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-pill: 999px;

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(0,0,0,.4);
  --shadow:     0 4px 16px rgba(0,0,0,.5);
  --shadow-lg:  0 8px 32px rgba(0,0,0,.6);
  --shadow-primary: 0 0 20px var(--primary-glow);

  /* Layout */
  --sidebar-w: 260px;
  --header-h:  68px;

  /* Transitions */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --dur:  0.18s;
}

/* ── 2. Reset & Base ───────────────────────────────────────────── */
*, *::before, *::after {
  margin: 0; padding: 0;
  box-sizing: border-box;
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
  background: var(--bg-body);
  color: var(--text-main);
  font-family: 'Kanit', sans-serif;
  font-weight: 400;
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-hover); }

img { max-width: 100%; height: auto; }

/* ── 3. Scrollbar ──────────────────────────────────────────────── */
::-webkit-scrollbar            { width: 6px; height: 6px; }
::-webkit-scrollbar-track      { background: #000; }
::-webkit-scrollbar-thumb      { background: #2a2a2a; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover{ background: var(--primary); }

/* ── 4. Page Shell ─────────────────────────────────────────────── */
.page-shell {
  display: flex;
  min-height: 100vh;
}

/* ── 5. Sidebar ────────────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-w);
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  height: 100vh;
  position: fixed;
  top: 0; left: 0;
  display: flex;
  flex-direction: column;
  z-index: 1000;
  transition: transform var(--dur) var(--ease);
  box-shadow: 4px 0 24px rgba(0,0,0,.5);
}

.sidebar-header {
  padding: var(--sp-5);
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255,102,0,.06), transparent);
  flex-shrink: 0;
}

.logo-icon {
  width: 38px; height: 38px;
  background: var(--primary);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  color: #000;
  font-size: 1.1rem;
  flex-shrink: 0;
  box-shadow: 0 0 14px var(--primary-glow);
}

.brand-text {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
  letter-spacing: .8px;
  text-transform: uppercase;
}

.sidebar-menu {
  flex: 1;
  padding: var(--sp-5) var(--sp-2);
  overflow-y: auto;
  overflow-x: hidden;
}
.sidebar-menu::-webkit-scrollbar { width: 4px; }
.sidebar-menu::-webkit-scrollbar-thumb { background: #222; border-radius: 2px; }

.menu-category {
  font-size: .7rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin: var(--sp-4) var(--sp-3) var(--sp-2);
  font-weight: 600;
}

.nav-link {
  display: flex;
  align-items: center;
  padding: 10px var(--sp-4);
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
  margin-bottom: 2px;
  font-size: .92rem;
  border-left: 3px solid transparent;
  gap: var(--sp-3);
}

.nav-link i {
  width: 22px;
  text-align: center;
  font-size: 1rem;
  flex-shrink: 0;
  transition: color var(--dur) var(--ease);
}

.nav-link:hover {
  background: rgba(255,255,255,.04);
  color: var(--text-main);
}

.nav-link.active {
  background: linear-gradient(90deg, rgba(255,102,0,.14), transparent);
  color: var(--primary);
  border-left-color: var(--primary);
  font-weight: 500;
}

.nav-link.active i { color: var(--primary); }

.sidebar-footer {
  padding: var(--sp-5);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

/* ── 6. Main Content Area ──────────────────────────────────────── */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-w);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.top-header,
.topbar {
  height: var(--header-h);
  background: var(--bg-header);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--sp-8);
  position: sticky;
  top: 0;
  z-index: 900;
  backdrop-filter: blur(12px);
  flex-shrink: 0;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  min-width: 0;
}

.user-profile {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding-left: var(--sp-4);
  border-left: 1px solid var(--border);
}
.user-info { text-align: right; line-height: 1.1; }
.user-name { font-size: .875rem; font-weight: 700; color: var(--text-main); }
.user-role { font-size: .75rem; color: var(--text-muted); }
.user-avatar img {
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 2px solid var(--border);
  object-fit: cover;
}

.page-title-crumb {
  color: var(--text-muted);
  font-size: .875rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.page-title-crumb span { color: var(--primary); font-weight: 600; }

.page-title {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

.page-title i { color: var(--primary); }

.content-body {
  padding: var(--sp-8);
  flex: 1;
}

.mobile-toggle {
  display: none;
  background: transparent;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
  color: var(--text-main);
  padding: var(--sp-2);
  line-height: 1;
}

/* ── 7. Cards ──────────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--sp-6);
  transition: border-color var(--dur) var(--ease);
}

.card:hover { border-color: var(--border-light); }

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--sp-5);
  padding-bottom: var(--sp-4);
  border-bottom: 1px solid var(--border);
}

.card-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}

.card-title i { color: var(--primary); }

/* Stat card */
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--sp-5) var(--sp-6);
  position: relative;
  overflow: hidden;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px; height: 100%;
  background: var(--primary);
  border-radius: 0 2px 2px 0;
}

.stat-card:hover {
  transform: translateY(-2px);
  border-color: var(--primary-border);
}

.stat-card-label {
  font-size: .78rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .8px;
  font-weight: 500;
}

.stat-card-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.2;
  margin: var(--sp-1) 0 var(--sp-1);
}

.stat-card-icon {
  position: absolute;
  right: var(--sp-5);
  top: 50%;
  transform: translateY(-50%);
  font-size: 2.2rem;
  color: var(--primary);
  opacity: 0.12;
}

/* ── 8. Grid Utilities ─────────────────────────────────────────── */
.grid { display: grid; gap: var(--sp-5); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-6 { grid-template-columns: repeat(6, 1fr); }

/* ── 9. Buttons ────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  padding: 10px var(--sp-5);
  border-radius: var(--radius-sm);
  font-family: 'Kanit', sans-serif;
  font-size: .9rem;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
              transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
  white-space: nowrap;
  text-decoration: none;
  line-height: 1;
  -webkit-user-select: none;
  user-select: none;
}

.btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.btn:active { transform: scale(0.97); }

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

/* Primary */
.btn-primary {
  background: var(--primary);
  color: #000;
  font-weight: 600;
}
.btn-primary:hover:not(:disabled) {
  background: var(--primary-hover);
  box-shadow: 0 0 16px var(--primary-glow);
  color: #000;
}

/* Secondary */
.btn-secondary {
  background: transparent;
  color: var(--text-muted);
  border-color: var(--border-light);
}
.btn-secondary:hover:not(:disabled) {
  background: rgba(255,255,255,.05);
  color: var(--text-main);
  border-color: #444;
}

/* Danger */
.btn-danger {
  background: var(--danger-bg);
  color: var(--danger);
  border-color: var(--danger-border);
}
.btn-danger:hover:not(:disabled) {
  background: var(--danger);
  color: #fff;
  box-shadow: 0 0 14px rgba(255,41,80,.4);
}

/* Success */
.btn-success {
  background: var(--success-bg);
  color: var(--success);
  border-color: var(--success-border);
}
.btn-success:hover:not(:disabled) {
  background: var(--success);
  color: #000;
}

/* Logout */
.btn-logout {
  background: var(--danger-bg);
  color: var(--danger);
  border: 1px solid var(--danger-border);
  padding: 10px var(--sp-4);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: 'Kanit', sans-serif;
  font-size: .88rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  font-weight: 500;
  width: 100%;
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.btn-logout:hover {
  background: var(--danger);
  color: #fff;
  box-shadow: 0 0 12px rgba(255,41,80,.4);
  border-color: var(--danger);
}
.btn-logout:focus-visible { outline: 2px solid var(--danger); outline-offset: 2px; }

/* Sizes */
.btn-sm { padding: 7px var(--sp-3); font-size: .82rem; }
.btn-lg { padding: 13px var(--sp-8); font-size: 1rem; }
.btn-icon {
  padding: 9px;
  width: 36px; height: 36px;
  border-radius: var(--radius-sm);
}
.btn-icon.btn-sm { width: 30px; height: 30px; padding: 6px; font-size: .8rem; }

/* ── 10. Forms ─────────────────────────────────────────────────── */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  margin-bottom: var(--sp-5);
}

.form-label {
  font-size: .85rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: .3px;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 10px var(--sp-3);
  color: var(--text-main);
  font-family: 'Kanit', sans-serif;
  font-size: .9rem;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
  -webkit-appearance: none;
}

.form-input::placeholder,
.form-textarea::placeholder { color: rgba(255,255,255,.3); }

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(255,102,0,.12);
}

.form-input.error,
.form-select.error,
.form-textarea.error {
  border-color: var(--danger);
  box-shadow: 0 0 0 3px rgba(255,41,80,.1);
}

.form-error {
  font-size: .8rem;
  color: var(--danger);
  display: none;
}

.form-error.visible { display: block; }

.form-textarea { resize: vertical; min-height: 90px; line-height: 1.5; }

.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%23666'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--sp-3) center;
  padding-right: var(--sp-8);
  cursor: pointer;
}
.form-select option { background: var(--bg-card); color: var(--text-main); }

/* Toggle / Checkbox */
.form-check {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  cursor: pointer;
}

.form-check input[type="checkbox"] {
  width: 18px; height: 18px;
  accent-color: var(--primary);
  cursor: pointer;
  flex-shrink: 0;
}

/* ── 11. Badges ────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .3px;
  border: 1px solid transparent;
}

.badge-success { background: var(--success-bg); color: var(--success); border-color: var(--success-border); }
.badge-danger  { background: var(--danger-bg);  color: var(--danger);  border-color: var(--danger-border); }
.badge-warning { background: var(--warning-bg); color: var(--warning); border-color: var(--warning-border); }
.badge-info    { background: var(--info-bg);    color: var(--info);    border-color: var(--info-border); }
.badge-primary { background: var(--primary-subtle); color: var(--primary); border-color: var(--primary-border); }
.badge-muted   { background: rgba(255,255,255,.04); color: var(--text-muted); border-color: var(--border); }

/* ── 12. Tables ────────────────────────────────────────────────── */
.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  -webkit-overflow-scrolling: touch;
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: .88rem;
  min-width: 600px;
}

.table thead th {
  background: rgba(255,255,255,.03);
  color: var(--text-muted);
  font-size: .75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .8px;
  padding: var(--sp-3) var(--sp-4);
  text-align: left;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.table tbody td {
  padding: var(--sp-3) var(--sp-4);
  border-bottom: 1px solid var(--border);
  color: var(--text-main);
  vertical-align: middle;
}

.table tbody tr:last-child td { border-bottom: none; }

.table tbody tr {
  transition: background var(--dur) var(--ease);
}
.table tbody tr:hover { background: rgba(255,255,255,.025); }

/* ── 13. Alerts ────────────────────────────────────────────────── */
.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-3);
  padding: var(--sp-4);
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-size: .9rem;
}

.alert i { margin-top: 2px; flex-shrink: 0; }

.alert-success { background: var(--success-bg); border-color: var(--success-border); color: var(--success); }
.alert-danger  { background: var(--danger-bg);  border-color: var(--danger-border);  color: var(--danger); }
.alert-warning { background: var(--warning-bg); border-color: var(--warning-border); color: var(--warning); }
.alert-info    { background: var(--info-bg);    border-color: var(--info-border);    color: var(--info); }

/* ── 14. Modal ─────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg-overlay);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--sp-5);
  backdrop-filter: blur(4px);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur) var(--ease);
}

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

.modal {
  background: var(--bg-modal);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  transform: translateY(12px) scale(0.98);
  transition: transform var(--dur) var(--ease);
}

.modal-overlay.active .modal {
  transform: translateY(0) scale(1);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-5) var(--sp-6);
  border-bottom: 1px solid var(--border);
}

.modal-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
}

.modal-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.2rem;
  cursor: pointer;
  padding: var(--sp-1);
  border-radius: var(--radius-sm);
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
  display: flex; align-items: center; justify-content: center;
  width: 32px; height: 32px;
}
.modal-close:hover { color: var(--text-main); background: rgba(255,255,255,.06); }
.modal-close:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

.modal-body    { padding: var(--sp-6); }
.modal-footer  {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--sp-3);
  padding: var(--sp-4) var(--sp-6);
  border-top: 1px solid var(--border);
}

/* ── 15. Loading / Skeleton ─────────────────────────────────────── */
@keyframes shimmer {
  0%   { background-position: -400px 0; }
  100% { background-position: 400px 0; }
}

.skeleton {
  background: linear-gradient(90deg,
    var(--bg-card) 25%,
    rgba(255,255,255,.04) 37%,
    var(--bg-card) 63%
  );
  background-size: 800px 100%;
  animation: shimmer 1.4s ease infinite;
  border-radius: var(--radius-sm);
}

.skeleton-text { height: 16px; border-radius: var(--radius-sm); }
.skeleton-heading { height: 24px; width: 60%; border-radius: var(--radius-sm); }

/* Spinner */
@keyframes spin { to { transform: rotate(360deg); } }

.spinner {
  width: 20px; height: 20px;
  border: 2px solid rgba(255,255,255,.1);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin .7s linear infinite;
  display: inline-block;
  flex-shrink: 0;
}

/* ── 16. Status Dot ────────────────────────────────────────────── */
.status-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  display: inline-block;
  flex-shrink: 0;
}
.status-dot.online  { background: var(--success); box-shadow: 0 0 6px var(--success); }
.status-dot.offline { background: var(--danger); }
.status-dot.warning { background: var(--warning); }
.status-dot.idle    { background: var(--text-dim); }

/* ── 17. Page Fade-in ───────────────────────────────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

.fade-up { animation: fadeUp .28s var(--ease) both; }
.fade-up-1 { animation-delay: .05s; }
.fade-up-2 { animation-delay: .1s; }
.fade-up-3 { animation-delay: .15s; }
.fade-up-4 { animation-delay: .2s; }

/* ── 18. Utility Classes ───────────────────────────────────────── */
.flex           { display: flex; }
.flex-col       { flex-direction: column; }
.items-center   { align-items: center; }
.items-start    { align-items: flex-start; }
.justify-between{ justify-content: space-between; }
.justify-end    { justify-content: flex-end; }
.gap-2          { gap: var(--sp-2); }
.gap-3          { gap: var(--sp-3); }
.gap-4          { gap: var(--sp-4); }
.gap-5          { gap: var(--sp-5); }
.flex-1         { flex: 1; }
.flex-wrap      { flex-wrap: wrap; }

.text-muted     { color: var(--text-muted); }
.text-dim       { color: var(--text-dim); }
.text-success   { color: var(--success); }
.text-danger    { color: var(--danger); }
.text-warning   { color: var(--warning); }
.text-primary   { color: var(--primary); }
.text-sm        { font-size: .82rem; }
.text-xs        { font-size: .74rem; }
.text-lg        { font-size: 1.1rem; }
.fw-500         { font-weight: 500; }
.fw-600         { font-weight: 600; }
.fw-700         { font-weight: 700; }
.text-right     { text-align: right; }
.text-center    { text-align: center; }

.mt-4 { margin-top: var(--sp-4); }
.mt-5 { margin-top: var(--sp-5); }
.mt-6 { margin-top: var(--sp-6); }
.mb-4 { margin-bottom: var(--sp-4); }
.mb-5 { margin-bottom: var(--sp-5); }
.mb-6 { margin-bottom: var(--sp-6); }

.w-full  { width: 100%; }
.hidden  { display: none !important; }
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* Focus visible (keyboard navigation) */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* ── 19. Empty State ───────────────────────────────────────────── */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--sp-12) var(--sp-8);
  text-align: center;
  color: var(--text-dim);
}

.empty-state i {
  font-size: 3rem;
  margin-bottom: var(--sp-4);
  color: var(--border-light);
}

.empty-state p { font-size: .9rem; max-width: 280px; }

/* ── 20. Responsive ────────────────────────────────────────────── */
@media (max-width: 1200px) {
  .grid-6 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 1024px) {
  .content-body { padding: var(--sp-5); }
  .grid-6 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  /* Sidebar: off-canvas on mobile */
  .sidebar {
    transform: translateX(-100%);
    width: 260px;
  }
  .sidebar.active { transform: translateX(0); }

  /* Overlay when sidebar open */
  .sidebar-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.7);
    z-index: 999;
    backdrop-filter: blur(2px);
  }

  .main-content { margin-left: 0; }
  .mobile-toggle { display: block; }
  .top-header { padding: 0 var(--sp-5); }
  .content-body { padding: var(--sp-4); }

  /* Grids → single column on mobile */
  .grid-2,
  .grid-3,
  .grid-4,
  .grid-6 { grid-template-columns: 1fr; }

  /* Cards */
  .card { padding: var(--sp-4); }

  /* Buttons — larger touch targets */
  .btn { padding: 12px var(--sp-5); min-height: 44px; }
  .btn-sm { padding: 10px var(--sp-4); min-height: 38px; }

  /* Modal */
  .modal { max-height: 95vh; margin: 0 var(--sp-2); }
  .modal-body { padding: var(--sp-4); }

  /* Tables: horizontal scroll hint */
  .table-wrapper::after {
    content: '← scroll →';
    display: block;
    text-align: center;
    font-size: .72rem;
    color: var(--text-dim);
    padding: var(--sp-2);
    display: none;
  }
}

@media (max-width: 480px) {
  .top-header { padding: 0 var(--sp-4); }
  .page-title { font-size: 1rem; }
  .stat-card-value { font-size: 1.6rem; }
  .form-input, .form-select, .form-textarea {
    font-size: 16px; /* prevents iOS zoom */
  }
}

/* ── 21. Reduced Motion ─────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ── 22. Sidebar backdrop (JS toggle) ────────────────────────────── */
.sidebar-backdrop { display: none; }

/* =========================================================================
   23. Admin Shared UX Foundation
   ─────────────────────────────────────────────────────────────────────────
   Shared patterns for all admin backoffice pages.
   ยึด promotion-assets เป็นแม่แบบ — เพิ่มเป็น additive ไม่ชนของเดิม
   ========================================================================= */

/* ── 23.1 Button Variants (เพิ่มจาก .btn ที่มีอยู่) ─────────────── */
.btn-outline {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary-border);
}
.btn-outline:hover:not(:disabled) {
  background: var(--primary-subtle);
  border-color: var(--primary);
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border-color: transparent;
}
.btn-ghost:hover:not(:disabled) {
  background: rgba(255,255,255,.05);
  color: var(--text-main);
}

/* ── 23.2 Page Header ────────────────────────────────────────────── */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  margin-bottom: var(--sp-6);
  flex-wrap: wrap;
}

.page-header-left {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  flex-wrap: wrap;
  min-width: 0;
}

.page-header-right {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  flex-shrink: 0;
}

.page-header .page-title {
  margin: 0;
  white-space: nowrap;
}

.page-subtitle {
  font-size: .82rem;
  color: var(--text-muted);
  font-weight: 400;
}

.page-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}

.env-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  border: 1px solid transparent;
}
.env-badge.dev {
  background: var(--info-bg);
  color: var(--info);
  border-color: var(--info-border);
}
.env-badge.prod {
  background: var(--danger-bg);
  color: var(--danger);
  border-color: var(--danger-border);
}

/* ── 23.3 KPI Strip ──────────────────────────────────────────────── */
.kpi-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--sp-3);
  margin-bottom: var(--sp-6);
}

.kpi-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--sp-3) var(--sp-4);
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  transition: border-color var(--dur) var(--ease);
}
.kpi-card:hover { border-color: var(--border-light); }

.kpi-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .95rem;
  flex-shrink: 0;
  background: var(--primary-subtle);
  color: var(--primary);
}
.kpi-card.success .kpi-icon { background: var(--success-bg); color: var(--success); }
.kpi-card.danger  .kpi-icon { background: var(--danger-bg);  color: var(--danger); }
.kpi-card.warning .kpi-icon { background: var(--warning-bg); color: var(--warning); }
.kpi-card.info    .kpi-icon { background: var(--info-bg);    color: var(--info); }

.kpi-body { min-width: 0; }

.kpi-value {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.2;
}

.kpi-label {
  font-size: .72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .6px;
  font-weight: 500;
}

.kpi-meta {
  font-size: .7rem;
  color: var(--text-dim);
  margin-top: 1px;
}

/* ── 23.4 Section Card ───────────────────────────────────────────── */
.section-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  margin-bottom: var(--sp-5);
  overflow: hidden;
}

.section-head,
.section-card-header {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-4) var(--sp-5);
  border-bottom: 1px solid var(--border);
  min-height: 48px;
  font-size: .88rem;
  font-weight: 600;
  color: var(--text-main);
  background: rgba(255,255,255,.015);
}
.section-card-header i { color: var(--primary); }

.section-title {
  font-size: .92rem;
  font-weight: 600;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}
.section-title i { color: var(--primary); font-size: .85rem; }

.section-subtitle {
  font-size: .78rem;
  color: var(--text-muted);
  font-weight: 400;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  font-size: .7rem;
  font-weight: 600;
  background: var(--primary-subtle);
  color: var(--primary);
  border: 1px solid var(--primary-border);
}

.section-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  margin-left: auto;
}

.section-body {
  padding: var(--sp-5);
}

.section-divider {
  height: 1px;
  background: var(--border);
  margin: var(--sp-4) 0;
  border: none;
}

/* ── 23.4b Hub Tabs (Admin Control Center) ──────────────────────────── */
.hub-tabs {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--border);
  margin-bottom: var(--sp-5);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.hub-tab {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-3) var(--sp-4);
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: 'Kanit', sans-serif;
  font-size: .84rem;
  font-weight: 500;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.hub-tab:hover { color: var(--text-main); }
.hub-tab.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}
.hub-tab .section-badge { margin-left: 2px; }
.hub-panel { display: none; }
.hub-panel.active { display: block; animation: fadeUp .22s var(--ease) both; }

/* ── 23.5 Enhanced Empty State ────────────────────────────────────── */
.empty-state-icon {
  font-size: 2.5rem;
  color: var(--border-light);
  margin-bottom: var(--sp-3);
}

.empty-state-title {
  font-size: .95rem;
  color: var(--text-muted);
  font-weight: 500;
  margin-bottom: var(--sp-1);
}

.empty-state-desc {
  font-size: .82rem;
  color: var(--text-dim);
  max-width: 320px;
}

.empty-state-actions {
  margin-top: var(--sp-4);
  display: flex;
  gap: var(--sp-2);
}

/* ── 23.6 Confirm Modal ──────────────────────────────────────────── */
.confirm-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg-overlay);
  z-index: 3000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--sp-5);
  backdrop-filter: blur(4px);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur) var(--ease);
}
.confirm-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.confirm-box {
  background: var(--bg-modal);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow-lg);
  transform: translateY(8px) scale(0.97);
  transition: transform var(--dur) var(--ease);
}
.confirm-overlay.active .confirm-box {
  transform: translateY(0) scale(1);
}

.confirm-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-5) var(--sp-5) 0;
}

.confirm-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-main);
}

.confirm-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.1rem;
  cursor: pointer;
  padding: var(--sp-1);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
}
.confirm-close:hover { color: var(--text-main); background: rgba(255,255,255,.06); }

.confirm-desc {
  padding: var(--sp-3) var(--sp-5);
  font-size: .88rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.confirm-actions {
  display: flex;
  justify-content: flex-end;
  gap: var(--sp-2);
  padding: var(--sp-3) var(--sp-5) var(--sp-5);
}

/* ── 23.7 Toast Stack ────────────────────────────────────────────── */
.app-toast-stack {
  position: fixed;
  bottom: var(--sp-6);
  right: var(--sp-6);
  z-index: 4000;
  display: flex;
  flex-direction: column-reverse;
  gap: var(--sp-2);
  pointer-events: none;
  max-width: 380px;
}

@keyframes toastIn {
  from { transform: translateX(calc(100% + 24px)); opacity: 0; }
  to   { transform: translateX(0); opacity: 1; }
}
@keyframes toastOut {
  from { transform: translateX(0); opacity: 1; }
  to   { transform: translateX(calc(100% + 24px)); opacity: 0; }
}

.app-toast {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: var(--sp-3) var(--sp-4);
  display: flex;
  align-items: flex-start;
  gap: var(--sp-3);
  box-shadow: var(--shadow);
  pointer-events: auto;
  animation: toastIn .28s var(--ease) both;
  min-width: 240px;
}
.app-toast.removing {
  animation: toastOut .22s var(--ease) both;
}

.app-toast-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .85rem;
  margin-top: 1px;
}

.app-toast.success { border-left: 3px solid var(--success); }
.app-toast.success .app-toast-icon { color: var(--success); }

.app-toast.error { border-left: 3px solid var(--danger); }
.app-toast.error .app-toast-icon { color: var(--danger); }

.app-toast-body { flex: 1; min-width: 0; }

.app-toast-title {
  font-size: .85rem;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.3;
}

.app-toast-message {
  font-size: .78rem;
  color: var(--text-muted);
  margin-top: 1px;
  line-height: 1.3;
}

.app-toast-close {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  padding: 2px;
  font-size: .8rem;
  flex-shrink: 0;
  line-height: 1;
}
.app-toast-close:hover { color: var(--text-main); }

/* ── 23.8 Small Utilities (เพิ่มจากที่มี) ────────────────────────── */
.is-hidden   { display: none !important; }
.mt-0  { margin-top: 0 !important; }
.mt-8  { margin-top: var(--sp-8); }
.mb-0  { margin-bottom: 0 !important; }
.mb-8  { margin-bottom: var(--sp-8); }
.gap-8 { gap: var(--sp-8); }

/* ── 23.9 Collapsible Section Card ───────────────────────────────── */
.section-card.collapsible .section-head {
  cursor: pointer;
  user-select: none;
}
.section-card.collapsible .section-head:hover {
  background: rgba(255,255,255,.02);
}

.section-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  font-size: .7rem;
  color: var(--text-dim);
  transition: transform var(--dur) var(--ease);
  flex-shrink: 0;
  margin-left: auto;
}
.section-card.collapsed .section-toggle {
  transform: rotate(-90deg);
}

.section-card.collapsed > .section-body {
  display: none;
}

/* ── 23.10 Foundation Responsive ─────────────────────────────────── */
@media (max-width: 768px) {
  .page-header {
    flex-direction: column;
    align-items: flex-start;
  }
  .page-header-right,
  .page-actions {
    width: 100%;
    flex-wrap: wrap;
  }
  .kpi-strip {
    grid-template-columns: repeat(2, 1fr);
  }
  .section-head {
    flex-wrap: wrap;
  }
  .section-actions {
    margin-left: 0;
    width: 100%;
    justify-content: flex-end;
  }
  .app-toast-stack {
    right: var(--sp-3);
    bottom: var(--sp-3);
    left: var(--sp-3);
    max-width: none;
  }
  .confirm-box { margin: 0 var(--sp-3); }
}

@media (max-width: 480px) {
  .kpi-strip { grid-template-columns: 1fr; }
}