/* ============================================================
   MeatSpec ERP – Design System & Global Styles
   Modern, Clean, Professional UI
   ============================================================ */

/* ── Google Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* ── CSS Custom Properties (Design Tokens) ── */
:root {
  /* Brand Colors (Dark Red / Gourmet Maroon) */
  --clr-primary:       #841822;
  --clr-primary-dark:  #5e0e17;
  --clr-primary-light: #e04859;
  --clr-primary-bg:    #fdf2f3;

  /* Neutrals */
  --clr-bg:            #f5f6fa;
  --clr-surface:       #ffffff;
  --clr-surface-2:     #f9f9fb;
  --clr-border:        #e5e7eb;
  --clr-border-light:  #f0f0f4;

  /* Text */
  --clr-text:          #1a1d23;
  --clr-text-muted:    #6b7280;
  --clr-text-light:    #9ca3af;

  /* Sidebar */
  --sidebar-bg:        #1a1d23;
  --sidebar-text:      #a8b0bf;
  --sidebar-active:    #e04859;
  --sidebar-hover-bg:  rgba(255,255,255,0.06);
  --sidebar-w:         240px;

  /* Status */
  --clr-success:       #10b981;
  --clr-success-bg:    #ecfdf5;
  --clr-warning:       #f59e0b;
  --clr-warning-bg:    #fffbeb;
  --clr-danger:        #ef4444;
  --clr-danger-bg:     #fef2f2;
  --clr-info:          #3b82f6;
  --clr-info-bg:       #eff6ff;

  /* Typography */
  --font:              'Inter', system-ui, sans-serif;
  --fs-xs:             0.75rem;
  --fs-sm:             0.8125rem;
  --fs-base:           0.875rem;
  --fs-md:             1rem;
  --fs-lg:             1.125rem;
  --fs-xl:             1.25rem;
  --fs-2xl:            1.5rem;

  /* Spacing */
  --sp-xs:  4px;
  --sp-sm:  8px;
  --sp-md:  16px;
  --sp-lg:  24px;
  --sp-xl:  32px;
  --sp-2xl: 48px;

  /* Radius */
  --radius-sm:   6px;
  --radius-md:   10px;
  --radius-lg:   14px;
  --radius-xl:   20px;
  --radius-full: 9999px;

  /* Shadow */
  --shadow-sm:   0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md:   0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg:   0 8px 24px rgba(0,0,0,0.10);
  --shadow-xl:   0 20px 40px rgba(0,0,0,0.12);

  /* Transitions */
  --tr:          0.18s ease;
  --tr-slow:     0.3s ease;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  font-size: var(--fs-base);
  color: var(--clr-text);
  background: var(--clr-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }

/* ── App Layout ── */
.app-layout {
  display: flex;
  min-height: 100vh;
}

/* ── Sidebar ── */
.sidebar {
  width: var(--sidebar-w);
  background: var(--sidebar-bg);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0;
  height: 100vh;
  z-index: 100;
  transition: transform var(--tr-slow);
  overflow-y: auto;
  overflow-x: hidden;
}
.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 4px; }

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: var(--sp-sm);
  padding: var(--sp-lg) var(--sp-md);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.sidebar-brand .brand-icon {
  width: 36px; height: 36px;
  background: var(--clr-primary);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; flex-shrink: 0;
}
.sidebar-brand .brand-name {
  font-size: var(--fs-md);
  font-weight: 700;
  color: #fff;
  line-height: 1.2;
}
.sidebar-brand .brand-sub {
  font-size: var(--fs-xs);
  color: var(--sidebar-text);
}

.sidebar-section {
  padding: var(--sp-md) var(--sp-sm) var(--sp-sm);
}
.sidebar-label {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(168,176,191,0.5);
  padding: 0 var(--sp-sm);
  margin-bottom: var(--sp-xs);
}
.nav-item {
  display: flex;
  align-items: center;
  gap: var(--sp-sm);
  padding: 9px var(--sp-sm);
  border-radius: var(--radius-sm);
  color: var(--sidebar-text);
  font-size: var(--fs-sm);
  font-weight: 500;
  transition: all var(--tr);
  margin-bottom: 2px;
  white-space: nowrap;
}
.nav-item:hover {
  background: var(--sidebar-hover-bg);
  color: #fff;
}
.nav-item.active {
  background: rgba(132,24,34,0.28);
  color: var(--clr-primary-light);
}
.nav-item.active .nav-icon { color: var(--clr-primary-light); }
.nav-icon { font-size: 16px; width: 20px; text-align: center; flex-shrink: 0; }
.nav-badge {
  margin-left: auto;
  background: var(--clr-primary);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  padding: 1px 6px;
  border-radius: var(--radius-full);
}

.sidebar-footer {
  margin-top: auto;
  padding: var(--sp-md);
  border-top: 1px solid rgba(255,255,255,0.06);
}
.sidebar-user {
  display: flex;
  align-items: center;
  gap: var(--sp-sm);
  padding: var(--sp-sm);
  border-radius: var(--radius-sm);
  transition: background var(--tr);
}
.sidebar-user:hover { background: var(--sidebar-hover-bg); }
.user-avatar {
  width: 32px; height: 32px;
  background: var(--clr-primary);
  border-radius: var(--radius-full);
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700; color: #fff;
  flex-shrink: 0;
}
.user-info { overflow: hidden; }
.user-name {
  font-size: var(--fs-sm);
  font-weight: 600;
  color: #fff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.user-role {
  font-size: var(--fs-xs);
  color: var(--sidebar-text);
  text-transform: capitalize;
}
.logout-btn {
  margin-left: auto;
  color: var(--sidebar-text);
  font-size: 15px;
  padding: 4px;
  border-radius: 4px;
  transition: color var(--tr);
  flex-shrink: 0;
}
.logout-btn:hover { color: var(--clr-danger); }

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

/* ── Top Header ── */
.topbar {
  background: var(--clr-surface);
  border-bottom: 1px solid var(--clr-border);
  padding: 0 var(--sp-xl);
  height: 60px;
  display: flex;
  align-items: center;
  gap: var(--sp-md);
  position: sticky; top: 0; z-index: 50;
}
.topbar-title {
  font-size: var(--fs-lg);
  font-weight: 600;
  color: var(--clr-text);
}
.topbar-sub {
  font-size: var(--fs-sm);
  color: var(--clr-text-muted);
  margin-left: var(--sp-xs);
}
.topbar-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: var(--sp-sm);
}
.topbar-shift {
  display: flex; align-items: center; gap: 6px;
  background: var(--clr-primary-bg);
  color: var(--clr-primary);
  font-size: var(--fs-xs);
  font-weight: 600;
  padding: 5px 12px;
  border-radius: var(--radius-full);
}
.topbar-date {
  font-size: var(--fs-sm);
  color: var(--clr-text-muted);
}

/* ── Page Content ── */
.page-content {
  padding: var(--sp-xl);
  flex: 1;
}
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--sp-xl);
  flex-wrap: wrap;
  gap: var(--sp-md);
}
.page-header h1 {
  font-size: var(--fs-xl);
  font-weight: 700;
}
.page-header p {
  font-size: var(--fs-sm);
  color: var(--clr-text-muted);
  margin-top: 2px;
}

/* ── Cards ── */
.card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}
.card-header {
  padding: var(--sp-md) var(--sp-lg);
  border-bottom: 1px solid var(--clr-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-md);
}
.card-title {
  font-size: var(--fs-md);
  font-weight: 600;
}
.card-body { padding: var(--sp-lg); }
.card-footer {
  padding: var(--sp-md) var(--sp-lg);
  border-top: 1px solid var(--clr-border);
  background: var(--clr-surface-2);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

/* ── Dashboard Layout Grid ── */
.dashboard-grid {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: var(--sp-lg);
  margin-bottom: var(--sp-lg);
}
@media (max-width: 900px) {
  .dashboard-grid {
    grid-template-columns: 1fr !important;
  }
}

/* ── Stat Cards ── */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--sp-md);
  margin-bottom: var(--sp-xl);
}
.stat-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: var(--sp-lg);
  display: flex;
  align-items: flex-start;
  gap: var(--sp-md);
  transition: box-shadow var(--tr), transform var(--tr);
}
.stat-card:hover { box-shadow: var(--shadow-md); transform: translateY(-1px); }
.stat-icon {
  width: 44px; height: 44px;
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; flex-shrink: 0;
}
.stat-icon.orange,
.stat-icon.maroon  { background: var(--clr-primary-bg); color: var(--clr-primary); }
.stat-icon.green   { background: var(--clr-success-bg); color: var(--clr-success); }
.stat-icon.yellow  { background: var(--clr-warning-bg); color: var(--clr-warning); }
.stat-icon.blue    { background: var(--clr-info-bg);    color: var(--clr-info); }
.stat-icon.red     { background: var(--clr-danger-bg);  color: var(--clr-danger); }
.stat-info { flex: 1; min-width: 0; }
.stat-label {
  font-size: var(--fs-xs);
  color: var(--clr-text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.stat-value {
  font-size: var(--fs-xl);
  font-weight: 700;
  color: var(--clr-text);
  line-height: 1.2;
  margin-top: 2px;
}
.stat-change {
  font-size: var(--fs-xs);
  margin-top: 4px;
  font-weight: 500;
}
.stat-change.up   { color: var(--clr-success); }
.stat-change.down { color: var(--clr-danger); }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: var(--fs-sm);
  font-weight: 600;
  font-family: var(--font);
  transition: all var(--tr);
  white-space: nowrap;
  cursor: pointer;
  border: 1.5px solid transparent;
}
.btn-primary {
  background: var(--clr-primary);
  color: #fff;
}
.btn-primary:hover { background: var(--clr-primary-dark); }
.btn-outline {
  background: transparent;
  border-color: var(--clr-border);
  color: var(--clr-text);
}
.btn-outline:hover { border-color: var(--clr-primary); color: var(--clr-primary); background: var(--clr-primary-bg); }
.btn-danger  { background: var(--clr-danger); color: #fff; }
.btn-danger:hover { background: #dc2626; }
.btn-success { background: var(--clr-success); color: #fff; }
.btn-success:hover { background: #059669; }
.btn-sm  { padding: 5px 12px; font-size: var(--fs-xs); }
.btn-lg  { padding: 11px 24px; font-size: var(--fs-md); }
.btn-icon { padding: 7px; }

/* ── Forms ── */
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--sp-md);
}
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group.full { grid-column: 1 / -1; }
label {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--clr-text-muted);
}
label .req { color: var(--clr-danger); margin-left: 2px; }
.form-control {
  padding: 9px 12px;
  border: 1.5px solid var(--clr-border);
  border-radius: var(--radius-sm);
  font-size: var(--fs-base);
  font-family: var(--font);
  color: var(--clr-text);
  background: var(--clr-surface);
  transition: border-color var(--tr), box-shadow var(--tr);
  width: 100%;
}
.form-control:focus {
  outline: none;
  border-color: var(--clr-primary);
  box-shadow: 0 0 0 3px rgba(132,24,34,0.12);
}
.form-control::placeholder { color: var(--clr-text-light); }
select.form-control { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 10px center; padding-right: 36px; }
textarea.form-control { resize: vertical; min-height: 80px; }
.form-hint { font-size: var(--fs-xs); color: var(--clr-text-muted); }
.form-error { font-size: var(--fs-xs); color: var(--clr-danger); }

/* ── Table ── */
.table-wrap { overflow-x: auto; border-radius: var(--radius-lg); }
table { width: 100%; border-collapse: collapse; }
thead tr { background: var(--clr-surface-2); }
th {
  padding: 10px 16px;
  text-align: left;
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--clr-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--clr-border);
  white-space: nowrap;
}
td {
  padding: 12px 16px;
  font-size: var(--fs-sm);
  border-bottom: 1px solid var(--clr-border-light);
  color: var(--clr-text);
}
tr:last-child td { border-bottom: none; }
tbody tr { transition: background var(--tr); }
tbody tr:hover { background: var(--clr-surface-2); }
.td-actions { display: flex; gap: 6px; align-items: center; }
.td-num { text-align: right; font-variant-numeric: tabular-nums; }

/* ── Badges ── */
.badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: var(--fs-xs);
  font-weight: 600;
}
.badge-success { background: var(--clr-success-bg); color: var(--clr-success); }
.badge-danger  { background: var(--clr-danger-bg);  color: var(--clr-danger); }
.badge-warning { background: var(--clr-warning-bg); color: var(--clr-warning); }
.badge-info    { background: var(--clr-info-bg);    color: var(--clr-info); }
.badge-neutral { background: var(--clr-border);     color: var(--clr-text-muted); }
.badge-primary { background: var(--clr-primary-bg); color: var(--clr-primary); }

/* ── Alerts / Flash Messages ── */
.alert {
  padding: var(--sp-sm) var(--sp-md);
  border-radius: var(--radius-sm);
  font-size: var(--fs-sm);
  display: flex; align-items: center; gap: var(--sp-sm);
  margin-bottom: var(--sp-md);
  border-left: 3px solid;
}
.alert-success { background: var(--clr-success-bg); color: #065f46; border-color: var(--clr-success); }
.alert-danger   { background: var(--clr-danger-bg);  color: #991b1b; border-color: var(--clr-danger); }
.alert-warning  { background: var(--clr-warning-bg); color: #92400e; border-color: var(--clr-warning); }
.alert-info     { background: var(--clr-info-bg);    color: #1e40af; border-color: var(--clr-info); }

/* ── Pagination ── */
.pagination {
  display: flex; align-items: center; gap: 4px;
  justify-content: center;
  margin-top: var(--sp-lg);
}
.page-link {
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--clr-text-muted);
  border: 1px solid var(--clr-border);
  transition: all var(--tr);
}
.page-link:hover { border-color: var(--clr-primary); color: var(--clr-primary); }
.page-link.active { background: var(--clr-primary); color: #fff; border-color: var(--clr-primary); }
.page-link.disabled { opacity: 0.4; pointer-events: none; }

/* ── Modal ── */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.45);
  display: flex; align-items: center; justify-content: center;
  z-index: 200;
  opacity: 0; pointer-events: none;
  transition: opacity var(--tr-slow);
  backdrop-filter: blur(3px);
}
.modal-overlay.open { opacity: 1; pointer-events: all; }
.modal {
  background: var(--clr-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  width: min(560px, 95vw);
  max-height: 90vh;
  overflow-y: auto;
  transform: translateY(20px) scale(0.97);
  transition: transform var(--tr-slow);
}
.modal-overlay.open .modal { transform: translateY(0) scale(1); }
.modal-header {
  padding: var(--sp-lg);
  border-bottom: 1px solid var(--clr-border);
  display: flex; align-items: center; justify-content: space-between;
}
.modal-title { font-size: var(--fs-md); font-weight: 700; }
.modal-close { font-size: 20px; color: var(--clr-text-muted); transition: color var(--tr); padding: 4px; }
.modal-close:hover { color: var(--clr-danger); }
.modal-body { padding: var(--sp-lg); }
.modal-footer {
  padding: var(--sp-md) var(--sp-lg);
  border-top: 1px solid var(--clr-border);
  display: flex; justify-content: flex-end; gap: var(--sp-sm);
}


/* ── Auth Page ── */
.auth-page {
  min-height: 100vh;
  background: linear-gradient(135deg, #1a1d23 0%, #2d1f18 50%, #1a1d23 100%);
  display: flex; align-items: center; justify-content: center;
  padding: var(--sp-lg);
}
.auth-card {
  background: var(--clr-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  width: 100%;
  max-width: 400px;
  overflow: hidden;
}
.auth-header {
  background: var(--clr-primary);
  padding: var(--sp-xl) var(--sp-xl) var(--sp-lg);
  text-align: center;
}
.auth-logo { font-size: 40px; margin-bottom: var(--sp-sm); }
.auth-header h1 { color: #fff; font-size: var(--fs-2xl); font-weight: 800; }
.auth-header p  { color: rgba(255,255,255,0.8); font-size: var(--fs-sm); margin-top: 4px; }
.auth-body { padding: var(--sp-xl); }
.auth-footer {
  padding: var(--sp-md) var(--sp-xl);
  background: var(--clr-surface-2);
  text-align: center;
  font-size: var(--fs-xs);
  color: var(--clr-text-muted);
  border-top: 1px solid var(--clr-border);
}

/* ── Utility Classes ── */
.text-primary { color: var(--clr-primary); }
.text-muted   { color: var(--clr-text-muted); }
.text-success { color: var(--clr-success); }
.text-danger  { color: var(--clr-danger); }
.text-warning { color: var(--clr-warning); }
.text-right   { text-align: right; }
.text-center  { text-align: center; }
.fw-600       { font-weight: 600; }
.fw-700       { font-weight: 700; }
.fs-sm        { font-size: var(--fs-sm); }
.fs-xs        { font-size: var(--fs-xs); }
.flex         { display: flex; }
.flex-center  { display: flex; align-items: center; }
.gap-sm       { gap: var(--sp-sm); }
.gap-md       { gap: var(--sp-md); }
.mt-md        { margin-top: var(--sp-md); }
.mt-lg        { margin-top: var(--sp-lg); }
.mb-md        { margin-bottom: var(--sp-md); }
.mb-lg        { margin-bottom: var(--sp-lg); }
.ml-auto      { margin-left: auto; }
.empty-state {
  text-align: center;
  padding: var(--sp-2xl) var(--sp-lg);
  color: var(--clr-text-muted);
}
.empty-state .icon { font-size: 48px; margin-bottom: var(--sp-md); }
.empty-state h3 { font-size: var(--fs-md); font-weight: 600; margin-bottom: 6px; }

/* ── Sale Row in Invoice ── */
.invoice-row {
  display: grid;
  grid-template-columns: 1fr 100px 120px 100px 40px;
  gap: var(--sp-sm);
  align-items: center;
  padding: var(--sp-sm) 0;
  border-bottom: 1px solid var(--clr-border-light);
}
.invoice-summary {
  border-top: 2px solid var(--clr-border);
  margin-top: var(--sp-sm);
  padding-top: var(--sp-md);
}
.invoice-summary-row {
  display: flex; justify-content: space-between;
  font-size: var(--fs-sm);
  padding: 4px 0;
}
.invoice-summary-row.total {
  font-size: var(--fs-md);
  font-weight: 700;
  border-top: 1px solid var(--clr-border);
  padding-top: var(--sp-sm);
  margin-top: var(--sp-sm);
  color: var(--clr-primary);
}

/* ── Search and Filter Controls ── */
.search-bar {
  display: flex;
  align-items: center;
  gap: var(--sp-sm);
  flex-wrap: wrap;
}
.search-input-wrap {
  position: relative;
  display: flex;
  align-items: center;
  flex: 1;
  min-width: 180px;
}
.search-input-wrap .ico {
  position: absolute;
  left: 12px;
  color: var(--clr-text-muted);
  display: flex;
  align-items: center;
  pointer-events: none;
}
.search-input-wrap .ico svg,
.search-input-wrap .ico i {
  width: 16px;
  height: 16px;
}
.search-input {
  width: 100%;
  padding: 8px 12px 8px 36px;
  border: 1.5px solid var(--clr-border);
  border-radius: var(--radius-sm);
  font-size: var(--fs-base);
  font-family: var(--font);
  color: var(--clr-text);
  background: var(--clr-surface);
  transition: border-color var(--tr), box-shadow var(--tr);
}
.search-input:focus {
  outline: none;
  border-color: var(--clr-primary);
  box-shadow: 0 0 0 3px rgba(132,24,34,0.12);
}

/* ── Mobile Drawer Backdrop & Close Button ── */
.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(3px);
  z-index: 140;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}
.sidebar-backdrop.open {
  opacity: 1;
  pointer-events: all;
}
.sidebar-close-btn {
  display: none;
  background: transparent;
  border: none;
  color: var(--sidebar-text);
  padding: 6px;
  cursor: pointer;
  border-radius: 6px;
  margin-left: auto;
}
.sidebar-close-btn:hover {
  color: #fff;
  background: var(--sidebar-hover-bg);
}

/* ── Mobile Bottom Navigation Bar (App Bar) ── */
.mobile-bottom-nav {
  display: none;
}

/* ── Print styles ── */
@media print {
  .sidebar, .topbar, .mobile-bottom-nav, .sidebar-backdrop, .no-print { display: none !important; }
  .main-content { margin-left: 0; }
  .page-content { padding: 0; }
}

/* ── Mobile & App-Friendly Responsive Styles ── */
@media (max-width: 768px) {
  /* Prevent iOS Safari 16px zoom bug */
  input, select, textarea, .form-control, .search-input {
    font-size: 16px !important;
  }

  /* Body & Layout */
  .app-layout {
    display: block;
    overflow-x: hidden;
  }
  .main-content {
    margin-left: 0 !important;
    min-height: calc(100vh - 65px);
  }
  .page-content {
    padding: var(--sp-md) var(--sp-md) calc(82px + env(safe-area-inset-bottom, 16px)) !important;
  }

  /* Sidebar Drawer */
  .sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    width: 290px;
    max-width: 85vw;
    z-index: 150;
    transform: translateX(-100%);
    transition: transform 0.28s cubic-bezier(0.32, 0.72, 0, 1);
    box-shadow: 4px 0 25px rgba(0, 0, 0, 0.35);
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .sidebar-backdrop {
    display: block;
  }
  .sidebar-close-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  /* Top App Bar */
  .topbar {
    padding: 0 var(--sp-md);
    height: 54px;
    position: sticky;
    top: 0;
    z-index: 90;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(8px);
  }
  #sidebarToggle {
    display: inline-flex !important;
  }
  .topbar-title {
    font-size: var(--fs-base);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 140px;
  }
  .topbar-date {
    display: none !important;
  }
  .topbar-shift {
    font-size: 11px;
    padding: 3px 8px;
  }
  .topbar-right .btn-primary {
    display: none !important; /* Prominently present in bottom app bar */
  }
  .topbar-right .btn {
    padding: 5px 10px;
    font-size: 12px;
  }

  /* Mobile Bottom Navigation Bar (Native App Style) */
  .mobile-bottom-nav {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: calc(60px + env(safe-area-inset-bottom, 0px));
    padding-bottom: env(safe-area-inset-bottom, 0px);
    background: var(--clr-surface);
    border-top: 1px solid var(--clr-border);
    z-index: 100;
    justify-content: space-around;
    align-items: center;
    box-shadow: 0 -4px 18px rgba(0, 0, 0, 0.08);
  }
  .mobile-nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    color: var(--clr-text-muted);
    font-size: 11px;
    font-weight: 600;
    text-decoration: none;
    padding: 6px 0;
    background: transparent;
    border: none;
    cursor: pointer;
    transition: color var(--tr);
  }
  .mobile-nav-item svg,
  .mobile-nav-item i {
    width: 20px;
    height: 20px;
  }
  .mobile-nav-item.active {
    color: var(--clr-primary);
  }
  .mobile-nav-item.mobile-nav-action {
    position: relative;
    color: var(--clr-primary);
  }
  .mobile-action-btn {
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--clr-primary), var(--clr-primary-dark));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: -22px;
    box-shadow: 0 4px 14px rgba(132, 24, 34, 0.45);
    border: 3px solid var(--clr-surface);
    transition: transform 0.15s ease;
  }
  .mobile-action-btn:active {
    transform: scale(0.92);
  }
  .mobile-action-btn svg,
  .mobile-action-btn i {
    width: 22px;
    height: 22px;
    stroke-width: 2.5;
  }

  /* Page Header */
  .page-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--sp-sm);
    margin-bottom: var(--sp-md);
  }
  .page-header > div:first-child h1 {
    font-size: var(--fs-lg);
  }
  .page-header .btn {
    width: 100%;
    justify-content: center;
  }

  /* Stat Grid & Cards */
  .stat-grid {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: var(--sp-sm);
    margin-bottom: var(--sp-md);
  }
  .stat-card {
    padding: var(--sp-md);
    border-radius: var(--radius-md);
  }
  .stat-card .stat-icon {
    width: 38px;
    height: 38px;
    font-size: 16px;
  }
  .stat-card .stat-value {
    font-size: var(--fs-md);
  }
  .stat-card .stat-label {
    font-size: var(--fs-xs);
  }

  /* Forms & Cards */
  .form-grid {
    grid-template-columns: 1fr !important;
    gap: var(--sp-sm);
  }
  .card {
    border-radius: var(--radius-md);
    margin-bottom: var(--sp-md);
  }
  .card-header {
    padding: var(--sp-sm) var(--sp-md);
    flex-wrap: wrap;
    gap: var(--sp-sm);
  }
  .card-body {
    padding: var(--sp-md);
  }
  .card-footer {
    padding: var(--sp-sm) var(--sp-md);
    flex-direction: column-reverse;
  }
  .card-footer .btn {
    width: 100%;
    justify-content: center;
  }

  /* Search & Filter Form */
  .search-bar {
    width: 100%;
    flex-direction: column;
    align-items: stretch;
  }
  .search-input-wrap {
    width: 100%;
  }
  .search-bar select,
  .search-bar input[type="date"] {
    width: 100% !important;
  }
  .search-bar .btn {
    width: 100%;
    justify-content: center;
  }

  /* Tables */
  .table-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: var(--radius-sm);
    margin: 0 -2px;
  }
  table th, table td {
    padding: 9px 11px;
    font-size: 12px;
  }
  .td-actions {
    flex-wrap: nowrap;
  }

  /* Sales Form & Summaries */
  #sale-form .card-body > div[style*="grid-template-columns"],
  #pur-form .card-body > div[style*="grid-template-columns"] {
    grid-template-columns: 1fr !important;
  }
  .invoice-summary {
    min-width: 100% !important;
    max-width: 100% !important;
  }

  /* Modal bottom-sheet style */
  .modal {
    width: 100%;
    max-height: 85vh;
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
    margin-top: auto;
    animation: slideUp 0.25s ease;
  }
  @keyframes slideUp {
    from { transform: translateY(100%); }
    to { transform: translateY(0); }
  }
}

@media (max-width: 480px) {
  .stat-grid {
    grid-template-columns: 1fr !important;
  }
}