/* ==========================================================================
   SimpleSend – Design System
   Layout: CSS Grid (page shells, card grids, forms)
            Flexbox (navbars, button rows, inline alignment)
   No Bootstrap grid — see docs/FRONTEND_STANDARDS.md
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design tokens (CSS custom properties)
   -------------------------------------------------------------------------- */
:root {
  /* Brand — SimpleSend Color Guide v1.0 */
  --color-primary:      #0067A6;   /* SimpleSend Blue */
  --color-primary-dark: #1E3461;   /* Midnight Navy */
  --color-primary-light:#E6F3FA;   /* Light tint of SimpleSend Blue */
  --color-accent:       #00B4D8;   /* Horizon Cyan */
  --color-accent-light: #E6F9FD;   /* Light tint of Horizon Cyan */

  /* Neutrals */
  --color-bg:           #F8FAFC;
  --color-surface:      #FFFFFF;
  --color-border:       #E2E8F0;
  --color-text:         #0F1A33;   /* Midnight Depth */
  --color-text-muted:   #4A5568;   /* Steel Gray */
  --color-text-light:   #718096;

  /* Semantic */
  --color-success:      #16A34A;
  --color-success-bg:   #F0FDF4;
  --color-warning:      #B45309;
  --color-warning-bg:   #FFFBEB;
  --color-danger:       #DC2626;
  --color-danger-bg:    #FEF2F2;
  --color-info:         #0067A6;
  --color-info-bg:      #E6F3FA;

  /* Sidebar */
  --sidebar-bg:         #1E3461;   /* Midnight Navy */
  --sidebar-w:          240px;
  --sidebar-text:       #A5B4FC;   /* Periwinkle */
  --sidebar-active-bg:  rgba(255,255,255,.09);

  /* Typography */
  --font-sans: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Menlo', monospace;

  /* Spacing scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;

  /* Radii */
  --radius-sm:  0.375rem;
  --radius-md:  0.625rem;
  --radius-lg:  0.875rem;
  --radius-xl:  1.25rem;

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md:  0 4px 12px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.04);
  --shadow-lg:  0 10px 30px rgba(0,0,0,.08), 0 4px 8px rgba(0,0,0,.04);

  /* Transitions */
  --transition-fast: 120ms ease;
  --transition-base: 200ms ease;
}

/* --------------------------------------------------------------------------
   2. Reset + Base
   -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html { font-size: 16px; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

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

img, svg { display: block; max-width: 100%; }

/* --------------------------------------------------------------------------
   3. App Shell — CSS Grid: sidebar | main
   -------------------------------------------------------------------------- */
.app-layout {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  min-height: 100vh;
}

/* ── Sidebar ── */
.sidebar {
  grid-column: 1;
  background: var(--sidebar-bg);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.sidebar-brand {
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid rgba(255,255,255,.1);
}

.sidebar-brand a {
  display: block;
  color: #fff;
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: -0.3px;
  text-decoration: none;
}

.sidebar-brand a span { color: #A5B4FC; }

/* Sidebar nav — flexbox column */
.sidebar-nav {
  display: flex;
  flex-direction: column;
  padding: 10px;
  flex: 1;
}

.sidebar-divider {
  height: 1px;
  background: rgba(255,255,255,.08);
  margin: var(--space-2) var(--space-5);
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 0.5rem var(--space-6);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 500;
  border-left: 3px solid transparent;
  transition: background var(--transition-fast), color var(--transition-fast);
  text-decoration: none;
}

.nav-link .icon { font-size: 1rem; opacity: 0.8; }

.nav-link:hover {
  background: var(--sidebar-active-bg);
  color: #fff;
  text-decoration: none;
}

.nav-link.active {
  background: var(--sidebar-active-bg);
  color: #fff;
  border-left-color: #00B4D8;
}

.sidebar-footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid rgba(255,255,255,.1);
  font-size: 0.8rem;
  color: var(--sidebar-text);
}

.sidebar-footer .user-name {
  font-weight: 600;
  color: #fff;
  margin-bottom: var(--space-1);
}

/* ── Main area ── */
.main-area {
  grid-column: 2;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-8);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.topbar-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.page-content {
  padding: var(--space-8);
  flex: 1;
}

/* --------------------------------------------------------------------------
   4. Auth Shell — CSS Grid body centering
   -------------------------------------------------------------------------- */
.auth-body {
  display: grid;
  place-items: center;
  min-height: 100vh;
  background: #E6F3FA;
  padding: var(--space-4);
}

.auth-card {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: var(--space-10);
  width: 100%;
  max-width: 420px;
  box-shadow: 0 8px 40px rgba(0,103,166,.12);
}

.auth-logo {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--color-primary);
  text-align: center;
}

.auth-logo span { color: var(--color-accent); }

.auth-subtitle {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-top: var(--space-1);
  margin-bottom: var(--space-6);
}

/* --------------------------------------------------------------------------
   5. CSS Grid layout patterns (reusable)
   -------------------------------------------------------------------------- */

/* Responsive stat card row — auto-fit, min 190px per card */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: var(--space-4);
}

/* Generic responsive card grid */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-4);
}

/* Two-column form */
.form-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

@media (max-width: 600px) {
  .form-grid-2 { grid-template-columns: 1fr; }
}

/* Sidebar + content pane inside a card */
.split-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: var(--space-6);
}

@media (max-width: 768px) {
  .split-layout { grid-template-columns: 1fr; }
}

/* --------------------------------------------------------------------------
   6. Section helpers
   -------------------------------------------------------------------------- */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.section-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0;
}

.page-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

/* --------------------------------------------------------------------------
   7. Cards
   -------------------------------------------------------------------------- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.card--elevated { box-shadow: var(--shadow-md); border: none; }

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--color-border);
  font-weight: 600;
  font-size: 0.9rem;
}

.card-body {
  padding: var(--space-6);
}

.card-footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-border);
  background: #FAFAFA;
}

/* Stat card */
.stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base);
}

.stat-card:hover { box-shadow: var(--shadow-md); }

.stat-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.stat-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: grid;
  place-items: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.stat-value {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1;
  color: var(--color-text);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 0.2rem;
  font-weight: 500;
}

.stat-sub {
  font-size: 0.78rem;
  color: var(--color-text-light);
  margin-top: var(--space-2);
}

/* Detail list — key/value pairs in campaign detail, etc. */
.detail-list {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-2) var(--space-4);
  margin: 0;
}
.detail-list dt {
  font-weight: 500;
}
.detail-list dd {
  margin: 0;
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   8. Buttons — Flexbox inline
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.5rem var(--space-4);
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.4;
  border: 1.5px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast),
              color var(--transition-fast), box-shadow var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
  font-family: inherit;
}

.btn:focus-visible {
  outline: 3px solid rgba(0,103,166,.4);
  outline-offset: 2px;
}

.btn--primary {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}
.btn--primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  text-decoration: none;
  color: #fff;
}

.btn--secondary {
  background: var(--color-surface);
  border-color: var(--color-border);
  color: var(--color-text);
}
.btn--secondary:hover {
  background: var(--color-bg);
  border-color: #CBD5E1;
  text-decoration: none;
  color: var(--color-text);
}

.btn--danger {
  background: var(--color-surface);
  border-color: #FCA5A5;
  color: var(--color-danger);
}
.btn--danger:hover {
  background: var(--color-danger-bg);
  text-decoration: none;
  color: var(--color-danger);
}

.btn--ghost {
  background: transparent;
  border-color: transparent;
  color: var(--color-primary);
}
.btn--ghost:hover {
  background: var(--color-primary-light);
  text-decoration: none;
  color: var(--color-primary-dark);
}

.btn--sm {
  padding: 0.3rem var(--space-3);
  font-size: 0.8rem;
  border-radius: var(--radius-sm);
}

.btn--lg {
  padding: 0.75rem var(--space-6);
  font-size: 1rem;
  border-radius: var(--radius-md);
  width: 100%;
  justify-content: center;
}

.btn:disabled, .btn[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Button group — flexbox row */
.btn-group {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

/* --------------------------------------------------------------------------
   9. Forms
   -------------------------------------------------------------------------- */
.form-group { margin-bottom: var(--space-5); }

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.form-label .required { color: var(--color-danger); margin-left: 2px; }

.form-control,
.form-select {
  display: block;
  width: 100%;
  padding: 0.55rem var(--space-3);
  font-size: 0.9375rem;
  font-family: inherit;
  line-height: 1.5;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  appearance: none;
  -webkit-appearance: none;
}

.form-control:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0,103,166,.15);
}

.form-control--lg {
  padding: 0.75rem var(--space-4);
  font-size: 1.0625rem;
  border-radius: var(--radius-md);
}

.form-control--code {
  font-family: var(--font-mono);
  letter-spacing: 0.3em;
  text-align: center;
  font-size: 1.4rem;
}

.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%2364748B' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2.5rem;
}

.form-hint {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

.form-error {
  font-size: 0.8rem;
  color: var(--color-danger);
  margin-top: var(--space-1);
}

/* --------------------------------------------------------------------------
   10. Alerts / Flash messages
   -------------------------------------------------------------------------- */
.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  margin-bottom: var(--space-4);
  border: 1px solid transparent;
}

.alert--success {
  background: var(--color-success-bg);
  border-color: #BBF7D0;
  color: #14532D;
}
.alert--warning {
  background: var(--color-warning-bg);
  border-color: #FDE68A;
  color: #78350F;
}
.alert--danger, .alert--error {
  background: var(--color-danger-bg);
  border-color: #FECACA;
  color: #7F1D1D;
}
.alert--info {
  background: var(--color-info-bg);
  border-color: #BAE6FD;
  color: #0C4A6E;
}

/* --------------------------------------------------------------------------
   11. Badges
   -------------------------------------------------------------------------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 0.2rem 0.55rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 999px;
  white-space: nowrap;
  border: 1px solid transparent;
}

.badge--neutral  { background: #F1F5F9; color: #475569; border-color: #E2E8F0; }
.badge--primary  { background: var(--color-primary-light); color: var(--color-primary); border-color: #C7D2FE; }
.badge--success  { background: var(--color-success-bg); color: var(--color-success); border-color: #BBF7D0; }
.badge--warning  { background: var(--color-warning-bg); color: var(--color-warning); border-color: #FDE68A; }
.badge--danger   { background: var(--color-danger-bg); color: var(--color-danger); border-color: #FECACA; }
.badge--accent   { background: var(--color-accent-light); color: var(--color-accent); border-color: #DDD6FE; }

/* Campaign status badges */
.status-draft      { background: #F1F5F9; color: #475569; border-color: #E2E8F0; }
.status-scheduled  { background: #DBEAFE; color: #1D4ED8; border-color: #BFDBFE; }
.status-sending    { background: #FEF3C7; color: #B45309; border-color: #FDE68A; }
.status-sent       { background: var(--color-success-bg); color: var(--color-success); border-color: #BBF7D0; }
.status-failed     { background: var(--color-danger-bg); color: var(--color-danger); border-color: #FECACA; }
.status-cancelled  { background: #F3F4F6; color: #6B7280; border-color: #E5E7EB; }
.status-paused     { background: #FFF7ED; color: #C2410C; border-color: #FDBA74; }

/* --------------------------------------------------------------------------
   12. Tables
   -------------------------------------------------------------------------- */
.table-wrap { overflow-x: auto; }

table.ss-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.ss-table th {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  font-size: 0.73rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-light);
  background: #FAFAFA;
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

.ss-table td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid #F1F5F9;
  vertical-align: middle;
  color: var(--color-text);
}

.ss-table tbody tr:hover { background: #FAFBFF; }
.ss-table tbody tr:last-child td { border-bottom: none; }

.td-mono { font-family: var(--font-mono); font-size: 0.82rem; }
.td-muted { color: var(--color-text-muted); }
.td-bold  { font-weight: 600; }

/* --------------------------------------------------------------------------
   13. Filter pill bar — flexbox
   -------------------------------------------------------------------------- */
.filter-bar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.filter-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem var(--space-3);
  font-size: 0.82rem;
  font-weight: 500;
  border: 1.5px solid var(--color-border);
  border-radius: 999px;
  color: var(--color-text-muted);
  background: var(--color-surface);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.filter-pill:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  text-decoration: none;
}

.filter-pill.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

/* --------------------------------------------------------------------------
   14. Empty states
   -------------------------------------------------------------------------- */
.empty-state {
  display: grid;
  place-items: center;
  text-align: center;
  padding: var(--space-10) var(--space-6);
  color: var(--color-text-muted);
}

.empty-state-icon {
  font-size: 3rem;
  opacity: 0.2;
  margin-bottom: var(--space-4);
  display: block;
}

.empty-state-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.empty-state p { font-size: 0.9rem; margin: 0 0 var(--space-4); }

/* --------------------------------------------------------------------------
   15. Search bar — flexbox
   -------------------------------------------------------------------------- */
.search-wrap {
  position: relative;
}

.search-icon {
  position: absolute;
  left: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-light);
  pointer-events: none;
  font-size: 0.9rem;
}

.search-wrap .form-control { padding-left: 2.25rem; }

.search-spinner {
  position: absolute;
  right: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.htmx-request .search-spinner { opacity: 1; }

/* --------------------------------------------------------------------------
   16. Spinner
   -------------------------------------------------------------------------- */
.spinner {
  width: 1rem;
  height: 1rem;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

/* --------------------------------------------------------------------------
   17. QR code / 2FA setup
   -------------------------------------------------------------------------- */
.qr-block {
  display: grid;
  place-items: center;
  margin: var(--space-4) 0;
}

.qr-block img {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3);
}

.secret-key {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  text-align: center;
  word-break: break-all;
}

/* --------------------------------------------------------------------------
   18. Misc utilities
   -------------------------------------------------------------------------- */
.text-muted  { color: var(--color-text-muted); }
.text-light  { color: var(--color-text-light); }
.text-danger { color: var(--color-danger); }
.text-success{ color: var(--color-success); }
.text-primary{ color: var(--color-primary); }

.fw-medium { font-weight: 500; }
.fw-semibold{ font-weight: 600; }
.fw-bold   { font-weight: 700; }

.text-sm   { font-size: 0.85rem; }
.text-xs   { font-size: 0.78rem; }

.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mt-1 { margin-top: var(--space-2); }
.mb-1 { margin-bottom: var(--space-2); }
.mt-2 { margin-top: var(--space-4); }
.mb-2 { margin-bottom: var(--space-4); }
.mt-3 { margin-top: var(--space-6); }
.mb-3 { margin-bottom: var(--space-6); }

.gap-1 { gap: var(--space-2); }
.gap-2 { gap: var(--space-4); }
.gap-3 { gap: var(--space-6); }

.d-flex         { display: flex; }
.align-center   { align-items: center; }
.justify-between{ justify-content: space-between; }
.justify-end    { justify-content: flex-end; }
.flex-wrap      { flex-wrap: wrap; }

/* --------------------------------------------------------------------------
   19. Mobile sidebar toggle
   -------------------------------------------------------------------------- */

/* Toggle button — hidden on desktop, shown on mobile */
.sidebar-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  background: none;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  color: var(--color-text);
  font-size: 1.25rem;
  flex-shrink: 0;
  transition: background var(--transition-fast), color var(--transition-fast);
}
.sidebar-toggle:hover {
  background: var(--color-bg);
}

/* Overlay behind sidebar on mobile */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(15, 26, 51, .45);
  z-index: 150;
  opacity: 0;
  transition: opacity 250ms ease;
}
.sidebar-overlay.is-visible {
  display: block;
  opacity: 1;
}

/* --------------------------------------------------------------------------
   20. Responsive adjustments
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
  .app-layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    display: flex;
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-w);
    height: 100vh;
    z-index: 160;
    transform: translateX(-100%);
    transition: transform 280ms cubic-bezier(.4, 0, .2, 1);
    box-shadow: 4px 0 30px rgba(0,0,0,.15);
  }

  .sidebar.is-open {
    transform: translateX(0);
  }

  .sidebar-toggle { display: flex; }

  .main-area { grid-column: 1; }

  .page-content { padding: var(--space-4); }

  .topbar { padding: var(--space-3) var(--space-4); }

  .stat-grid {
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  }
}