/* Focus-inspired design system for Billing Admin
 * Tokens adapted from Focus Flutter UI Kit (fui_theme / fui_colors):
 * primary ruby #D81E5B, secondary #1C1C1C, bg #f4f5f7, panel radius 6px
 * Existing PHP routes/logic unchanged — presentation only.
 */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

:root {
  /* Focus core */
  --fui-primary: #d81e5b;
  --fui-primary-soft: #fce7ef;
  --fui-secondary: #1c1c1c;
  --fui-bg0: #ffffff;
  --fui-bg1: #f4f5f7;
  --fui-bg2: #f7f8fa;
  --fui-bg3: #f3f3f3;
  --fui-shade0: #ffffff;
  --fui-shade1: #f3f3f3;
  --fui-shade2: #dedede;
  --fui-shade3: #6c6c6c;
  --fui-shade4: #3f3f3f;
  --fui-shade5: #121212;
  --fui-success: #17a36e;
  --fui-success-soft: #e8f7f1;
  --fui-complete: #23a2c6;
  --fui-complete-soft: #e6f6fb;
  --fui-error: #cf3236;
  --fui-error-soft: #fdecec;
  --fui-warning: #f0bd39;
  --fui-warning-soft: #fff8e6;
  --fui-cobalt: #4361ee;
  --fui-teal: #4cc9f0;
  --fui-denim: #001d3d;

  /* App aliases (keep existing class names working) */
  --bg: var(--fui-bg1);
  --card: var(--fui-bg0);
  --text: var(--fui-secondary);
  --muted: var(--fui-shade3);
  --primary: var(--fui-primary);
  --primary-soft: var(--fui-primary-soft);
  --danger: var(--fui-error);
  --danger-soft: var(--fui-error-soft);
  --ok: var(--fui-success);
  --ok-soft: var(--fui-success-soft);
  --warn: var(--fui-warning);
  --border: var(--fui-shade2);
  --sidebar: var(--fui-bg0);
  --sidebar-text: var(--fui-shade4);
  --shadow: 0 1px 2px rgba(28, 28, 28, 0.04), 0 8px 24px rgba(28, 28, 28, 0.04);
  --shadow-hover: 0 2px 4px rgba(28, 28, 28, 0.06), 0 12px 32px rgba(28, 28, 28, 0.08);
  --radius: 6px;
  --radius-sm: 5px;
  --radius-pill: 50px;
  --sidebar-width: 260px;
  --header-h: 64px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-7: 32px;
  --font: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }

body, .admin-body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; font-weight: 600; }
a:hover { color: #b5174a; }

/* —— Auth —— */
.auth-body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    radial-gradient(900px 420px at 10% -10%, rgba(216, 30, 91, 0.12), transparent 55%),
    radial-gradient(700px 360px at 100% 0%, rgba(67, 97, 238, 0.08), transparent 50%),
    var(--fui-bg1);
}
.auth-card {
  width: min(420px, 94vw);
  padding: 36px 32px;
  border-radius: 10px;
}
.auth-card .brand-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}
.auth-card h1 {
  margin: 0;
  font-size: 1.65rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--fui-secondary);
}
.auth-card .muted { margin: 0 0 24px; }

/* —— Cards / panels (Focus panel ≈ 6px radius, light border) —— */
.card, .fui-panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}
.fui-panel { padding: 0; overflow: hidden; }
.fui-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 15px 25px 8px;
  border-bottom: 1px solid var(--fui-shade1);
}
.fui-panel-header h3 {
  margin: 0;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--fui-secondary);
}
.fui-panel-body { padding: 10px 25px 16px; }
.fui-panel-body.flush { padding: 0; }

.muted { color: var(--muted); margin: 0 0 20px; }
.page-subtitle {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 500;
}

/* —— Forms —— */
label {
  display: block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--fui-shade3);
  margin: 14px 0 6px;
}
input, select, textarea {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font: inherit;
  background: #fff;
  color: var(--text);
  transition: border-color 0.15s, box-shadow 0.15s;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(216, 30, 91, 0.15);
}

/* —— Buttons —— */
button, .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 0;
  border-radius: var(--radius-sm);
  padding: 10px 16px;
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
  text-decoration: none;
  font-family: inherit;
  transition: background 0.15s, filter 0.15s, box-shadow 0.15s;
}
button:hover, .btn:hover {
  background: #c01a51;
  text-decoration: none;
  color: #fff;
  filter: none;
}
button[type=submit] { width: 100%; margin-top: 18px; }
.btn.secondary { background: var(--fui-secondary); }
.btn.secondary:hover { background: #000; }
.btn.danger { background: var(--danger); }
.btn.danger:hover { background: #b0282c; }
.btn.ok { background: var(--ok); }
.btn.ok:hover { background: #12885b; }
.btn.ghost {
  background: var(--fui-bg3);
  color: var(--fui-secondary);
  border: 1px solid var(--border);
}
.btn.ghost:hover { background: var(--fui-shade1); color: var(--fui-secondary); }
.btn.outline {
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
}
.btn.outline:hover { background: var(--primary-soft); color: var(--primary); }
.btn.sm { padding: 7px 11px; font-size: 12px; }
.btn:disabled { opacity: 0.55; cursor: not-allowed; }

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}
.toolbar input, .toolbar select { margin: 0; width: auto; min-width: 140px; }
.toolbar .grow { flex: 1; min-width: 180px; }

.bulk-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  background: var(--fui-bg2);
  border-bottom: 1px solid var(--border);
}
.check-all {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  margin: 0;
  text-transform: none;
  letter-spacing: 0;
  font-size: 0.9rem;
  color: var(--text);
}
.check-all input { width: auto; }
.row-disabled { opacity: 0.7; background: var(--fui-bg2); }
.hint { font-size: 0.8rem; color: var(--muted); margin-top: 14px; }

.alert {
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
  border: 1px solid transparent;
  font-weight: 500;
}
.alert.error { background: var(--danger-soft); color: var(--danger); border-color: #f5c2c3; }
.alert.ok { background: var(--ok-soft); color: var(--ok); border-color: #b6e5d1; }

/* —— Shell / layout (Focus: light sidebar, compact enterprise) —— */
.layout {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  min-height: 100vh;
}
.sidebar {
  background: var(--sidebar);
  color: var(--sidebar-text);
  padding: 20px 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: sticky;
  top: 0;
  height: 100vh;
  border-right: 1px solid var(--border);
  z-index: 30;
}
.sidebar-brand {
  display: flex;
  gap: 12px;
  align-items: center;
  padding: 8px 10px 18px;
}
.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 0.85rem;
  letter-spacing: -0.02em;
  box-shadow: 0 8px 18px rgba(216, 30, 91, 0.28);
}
.sidebar-brand strong {
  display: block;
  color: var(--fui-secondary);
  font-size: 0.98rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.brand-sub { display: block; font-size: 0.72rem; color: var(--muted); font-weight: 500; }

.nav-section {
  margin: 10px 10px 6px;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fui-shade3);
}
.sidebar-nav { display: flex; flex-direction: column; gap: 2px; flex: 1; overflow: auto; }
.sidebar a {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--fui-secondary);
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.92rem;
  border: 1px solid transparent;
}
.sidebar a .nav-ico {
  width: 20px;
  height: 20px;
  display: grid;
  place-items: center;
  color: var(--fui-shade3);
  flex-shrink: 0;
}
.sidebar a .nav-ico svg { width: 18px; height: 18px; }
.sidebar a:hover {
  background: var(--fui-bg2);
  text-decoration: none;
  color: var(--fui-secondary);
}
.sidebar a.active {
  background: var(--primary-soft);
  color: var(--primary);
  border-color: rgba(216, 30, 91, 0.18);
}
.sidebar a.active .nav-ico { color: var(--primary); }

.sidebar-foot {
  border-top: 1px solid var(--border);
  padding-top: 12px;
  display: grid;
  gap: 8px;
}
.sidebar-user {
  font-size: 0.82rem;
  color: var(--muted);
  padding: 0 10px;
  font-weight: 600;
}
.sidebar-logout {
  color: var(--danger) !important;
  font-weight: 700 !important;
}

.shell { min-width: 0; display: flex; flex-direction: column; background: var(--bg); }
.shell-header {
  display: flex;
  align-items: center;
  gap: 12px;
  height: var(--header-h);
  padding: 0 28px;
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 20;
}
.shell-title {
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  flex: 1;
  color: var(--fui-secondary);
}
.shell-header-right { display: flex; align-items: center; gap: 8px; }
.pill {
  background: var(--fui-bg3);
  color: var(--fui-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  padding: 6px 12px;
  font-size: 0.78rem;
  font-weight: 700;
}
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  padding: 0;
  background: var(--fui-bg3);
  color: var(--text);
  margin: 0;
  border: 1px solid var(--border);
}
.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(28, 28, 28, 0.35);
  z-index: 40;
}

.main { padding: 28px; }
.topbar, .page-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 22px;
  gap: 12px;
  flex-wrap: wrap;
}
.page-header h1, .topbar h1 {
  margin: 0;
  font-size: 1.7rem;
  font-weight: 800;
  letter-spacing: -0.035em;
  color: var(--fui-secondary);
}
.page-header-actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* —— Stats / KPI —— */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
  margin-bottom: 22px;
}
.stat, .fui-stat {
  padding: 18px 18px 16px;
  position: relative;
  overflow: hidden;
}
.stat::before, .fui-stat::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--primary);
}
.stat .n, .fui-stat .n {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--fui-secondary);
  line-height: 1.1;
}
.stat .l, .fui-stat .l {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-top: 8px;
}
.fui-stat.accent-ok::before { background: var(--ok); }
.fui-stat.accent-complete::before { background: var(--fui-complete); }
.fui-stat.accent-warn::before { background: var(--warn); }
.fui-stat.accent-cobalt::before { background: var(--fui-cobalt); }

/* —— Tables —— */
.table-wrap {
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
}
table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card);
}
th, td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--fui-shade1);
  font-size: 0.9rem;
}
th {
  background: var(--fui-bg2);
  color: var(--fui-shade3);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 700;
  white-space: nowrap;
}
tbody tr:hover { background: var(--fui-bg2); }
tbody tr:last-child td { border-bottom: 0; }

.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 9px;
  border-radius: var(--radius-pill);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.badge.on { background: var(--ok-soft); color: var(--ok); }
.badge.off { background: var(--danger-soft); color: var(--danger); }
.badge.warn { background: var(--fui-warning-soft); color: #9a7a12; }
.badge.neutral { background: var(--fui-bg3); color: var(--fui-shade4); }
.badge.info { background: var(--fui-complete-soft); color: var(--fui-complete); }

.actions { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }

/* Quiet table cells + overflow menus (SaaS list rows) */
.cell-title {
  font-weight: 700;
  color: var(--fui-secondary);
  text-decoration: none;
}
.cell-title:hover { color: var(--primary); }
.cell-meta {
  margin: 2px 0 0;
  font-size: 12px;
  color: var(--muted);
  font-weight: 500;
}
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
th.col-actions, td.col-actions {
  width: 118px;
  min-width: 118px;
  white-space: nowrap;
  text-align: right;
  padding-right: 16px !important;
  vertical-align: middle;
}
.row-actions {
  display: inline-flex;
  align-items: center;
  justify-content: flex-end;
  gap: 2px;
}
.link-quiet {
  font-size: 13px;
  font-weight: 600;
  color: var(--fui-shade4);
  text-decoration: none;
  padding: 6px 8px;
  border-radius: var(--radius-sm);
  border: 0;
  background: transparent;
  cursor: pointer;
  font-family: inherit;
  display: inline-flex;
  align-items: center;
}
.link-quiet:hover {
  color: var(--primary);
  background: var(--primary-soft);
}
button.link-quiet.danger-text,
.link-quiet.danger-text { color: var(--danger); }
button.link-quiet.danger-text:hover,
.link-quiet.danger-text:hover {
  color: var(--danger);
  background: var(--danger-soft);
}

/* Row menus — hidden by default (do NOT use display:flex alone; it overrides [hidden]) */
.menu {
  position: relative;
  display: inline-flex;
  align-items: center;
}
.menu-toggle {
  width: 34px;
  height: 34px;
  margin: 0;
  padding: 0;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--fui-shade4);
  font-size: 20px;
  line-height: 1;
  font-weight: 700;
  cursor: pointer;
}
.menu-toggle:hover,
.menu.is-open .menu-toggle {
  background: var(--fui-bg3);
  border-color: var(--border);
  color: var(--fui-secondary);
}

.menu-panel,
.menu-panel[hidden] {
  display: none !important;
}

/* Portal host on body — only one open menu at a time */
#menu-portal {
  position: fixed;
  inset: 0;
  z-index: 90;
  pointer-events: none;
}
#menu-portal .menu-panel {
  pointer-events: auto;
  position: absolute;
  min-width: 200px;
  max-width: min(240px, calc(100vw - 16px));
  padding: 6px;
  margin: 0;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hover);
  display: flex !important;
  flex-direction: column;
  gap: 2px;
}
#menu-portal .menu-panel a,
#menu-portal .menu-panel button {
  display: block;
  width: 100%;
  margin: 0;
  padding: 10px 12px;
  border: 0;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--fui-secondary);
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  text-align: left;
  text-decoration: none;
  cursor: pointer;
}
#menu-portal .menu-panel a:hover,
#menu-portal .menu-panel button:hover {
  background: var(--fui-bg2);
  color: var(--fui-secondary);
}
#menu-portal .menu-panel button.danger,
#menu-portal .menu-panel a.danger { color: var(--danger); }
#menu-portal .menu-panel button.danger:hover {
  background: var(--danger-soft);
  color: var(--danger);
}
#menu-portal .menu-sep {
  height: 1px;
  margin: 4px 6px;
  background: var(--fui-shade1);
}
#menu-portal .menu-panel form { margin: 0; }

/* Product image thumbnails */
.col-thumb {
  width: 52px;
  vertical-align: middle;
}
.product-thumb {
  display: block;
  object-fit: cover;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--fui-bg3);
  flex-shrink: 0;
}
.product-thumb--sm { width: 40px; height: 40px; }
.product-thumb--md { width: 64px; height: 64px; }
.product-thumb--lg { width: 96px; height: 96px; }
.product-thumb--empty {
  background:
    linear-gradient(135deg, var(--fui-bg3) 25%, transparent 25%) -4px 0 / 8px 8px,
    linear-gradient(225deg, var(--fui-bg3) 25%, transparent 25%) -4px 0 / 8px 8px,
    linear-gradient(315deg, var(--fui-shade1) 25%, transparent 25%) 0 0 / 8px 8px,
    linear-gradient(45deg, var(--fui-shade1) 25%, var(--fui-bg2) 25%) 0 0 / 8px 8px;
  border-style: dashed;
}
.product-preview {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 16px;
  margin: 0 0 18px;
  background: var(--fui-bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.product-image-editor {
  margin: 0 0 20px;
  padding: 14px 16px 16px;
  background: var(--fui-bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.product-image-editor .product-preview {
  padding: 0;
  margin: 0;
  background: transparent;
  border: 0;
}
.product-image-meta { min-width: 0; flex: 1; }
.product-image-actions { margin-top: 10px; }
.check-inline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  font-weight: 600;
  font-size: 13px;
  color: var(--danger);
  cursor: pointer;
}

@media (max-width: 720px) {
  th.col-actions, td.col-actions {
    width: 96px;
    min-width: 96px;
    padding-right: 10px !important;
  }
  .row-actions .link-quiet { display: none; }
}
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-card { max-width: 560px; }

.empty-state {
  text-align: center;
  padding: 48px 24px;
  background: var(--card);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
}
.empty-state-icon {
  width: 52px;
  height: 52px;
  margin: 0 auto 14px;
  border-radius: 12px;
  background: var(--primary-soft);
  color: var(--primary);
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 1.1rem;
}
.empty-state h3 { margin: 0 0 6px; font-weight: 800; }
.empty-state-actions { margin-top: 16px; }

.pagination {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  margin-top: 14px;
  padding: 4px 2px;
}
.pagination-info { color: var(--muted); font-size: 0.85rem; font-weight: 600; }
.pagination-links { display: flex; gap: 6px; flex-wrap: wrap; }
.pagination-links a {
  min-width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-sm);
  background: #fff;
  border: 1px solid var(--border);
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.85rem;
}
.pagination-links a.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.pagination-ellipsis { padding: 0 4px; color: var(--muted); }

.toast-root {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 80;
  display: grid;
  gap: 8px;
  width: min(360px, calc(100vw - 32px));
}
.toast {
  background: var(--fui-secondary);
  color: #fff;
  padding: 12px 14px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-hover);
  animation: toast-in 0.2s ease;
  font-weight: 600;
  font-size: 0.9rem;
}
.toast.ok { background: var(--ok); }
.toast.error { background: var(--danger); }

.modal[hidden] { display: none !important; }
.modal {
  position: fixed;
  inset: 0;
  z-index: 90;
  display: grid;
  place-items: center;
  padding: 16px;
}
.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(28, 28, 28, 0.45);
}
.modal-card {
  position: relative;
  width: min(420px, 100%);
  background: #fff;
  border-radius: 10px;
  padding: 22px;
  box-shadow: var(--shadow-hover);
  border: 1px solid var(--border);
}
.modal-card h3 { margin: 0 0 8px; font-weight: 800; }
.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 18px;
}
.modal-actions .btn { width: auto; margin: 0; }

.loading-block {
  padding: 28px;
  text-align: center;
  color: var(--muted);
}

/* Full-page submit / upload loader */
.page-loader {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(28, 28, 28, 0.42);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
}
.page-loader[hidden] {
  display: none !important;
}
.page-loader-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  min-width: min(280px, 100%);
  max-width: 360px;
  padding: 28px 24px;
  background: #fff;
  border-radius: 12px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-hover);
  text-align: center;
}
.page-loader-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--fui-shade2);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: page-loader-spin 0.7s linear infinite;
}
.page-loader-text {
  margin: 0;
  font-size: 14px;
  font-weight: 600;
  color: var(--fui-shade4);
  line-height: 1.4;
}
.page-loader-hint {
  margin: 0;
  font-size: 12px;
  font-weight: 500;
  color: var(--muted);
}
@keyframes page-loader-spin {
  to { transform: rotate(360deg); }
}

body.is-loading {
  overflow: hidden;
  cursor: wait;
}
body.is-loading .btn:not(:disabled),
body.is-loading button:not(:disabled) {
  pointer-events: none;
}
.btn.is-busy,
button.is-busy {
  position: relative;
  color: transparent !important;
  pointer-events: none;
}
.btn.is-busy::after,
button.is-busy::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 50%;
  width: 16px;
  height: 16px;
  margin: -8px 0 0 -8px;
  border: 2px solid rgba(255, 255, 255, 0.35);
  border-top-color: #fff;
  border-radius: 50%;
  animation: page-loader-spin 0.65s linear infinite;
}
.btn.ghost.is-busy::after,
.btn.secondary.is-busy::after,
.btn.ok.is-busy::after {
  border-color: rgba(28, 28, 28, 0.2);
  border-top-color: var(--primary);
}
.btn.ok.is-busy::after {
  border-top-color: var(--ok);
}
.btn.danger.is-busy::after {
  border-color: rgba(255, 255, 255, 0.35);
  border-top-color: #fff;
}

.tab-bar {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  margin-bottom: 16px;
  padding: 4px;
  background: var(--fui-bg3);
  border-radius: var(--radius);
  width: fit-content;
  border: 1px solid var(--border);
}
.tab-bar a, .tab-bar .btn {
  margin: 0;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--fui-shade4);
  border: 0;
  font-weight: 600;
  font-size: 13px;
  text-decoration: none;
}
.tab-bar a:hover, .tab-bar .btn:hover {
  color: var(--fui-secondary);
  background: rgba(255,255,255,0.55);
}
.tab-bar a.active, .tab-bar .btn.active,
.tab-bar .btn:not(.ghost) {
  background: #fff;
  color: var(--primary);
  box-shadow: var(--shadow);
}
.fui-panel-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.fui-toolbar { margin-bottom: 16px; }

@keyframes toast-in {
  from { transform: translateY(8px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: min(280px, 86vw);
    z-index: 50;
    transform: translateX(-105%);
    transition: transform 0.2s ease;
    height: 100vh;
  }
  .layout.nav-open .sidebar { transform: translateX(0); }
  .layout.nav-open .sidebar-backdrop { display: block; }
  .nav-toggle { display: inline-grid; place-items: center; }
  .grid-2 { grid-template-columns: 1fr; }
  .main { padding: 16px; }
  .shell-header { padding: 0 16px; }
}