@import url('https://fonts.googleapis.com/css2?family=Hind+Siliguri:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

/* ═══════════════════════════════════════════════
   VARIABLES
═══════════════════════════════════════════════ */
:root {
  --primary:       #2563eb;
  --primary-dark:  #1d4ed8;
  --primary-light: #dbeafe;
  --secondary:     #0f172a;
  --success:       #10b981;
  --danger:        #ef4444;
  --warning:       #f59e0b;
  --info:          #3b82f6;
  --sidebar-w:     260px;
  --header-h:      64px;
  --bg:            #f1f5f9;
  --card:          #ffffff;
  --border:        #e2e8f0;
  --text:          #1e293b;
  --muted:         #64748b;
  --light:         #94a3b8;
  --radius:        12px;
  --radius-sm:     8px;
  --shadow-sm:     0 1px 3px rgba(0,0,0,.08);
  --shadow:        0 4px 16px rgba(0,0,0,.10);
  --shadow-lg:     0 10px 40px rgba(0,0,0,.16);
  --transition:    all .2s ease;
}
[data-theme="dark"] {
  --bg:     #0f172a;
  --card:   #1e293b;
  --border: #334155;
  --text:   #f1f5f9;
  --muted:  #94a3b8;
  --light:  #475569;
  --shadow: 0 4px 16px rgba(0,0,0,.4);
}

/* ═══════════════════════════════════════════════
   RESET & BASE
═══════════════════════════════════════════════ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: 'Hind Siliguri', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}
a { text-decoration: none; }
img { max-width: 100%; }

/* ═══════════════════════════════════════════════
   LAYOUT
═══════════════════════════════════════════════ */
.app { display: flex; min-height: 100vh; }

/* ── Sidebar ── */
.sidebar {
  width: var(--sidebar-w);
  background: var(--secondary);
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: transform .25s ease;
  box-shadow: 2px 0 12px rgba(0,0,0,.18);
}
.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 20px;
  min-height: var(--header-h);
  border-bottom: 1px solid rgba(255,255,255,.08);
  flex-shrink: 0;
}
.brand-logo {
  width: 40px; height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), #7c3aed);
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; color: #fff; font-size: 18px;
  flex-shrink: 0; overflow: hidden;
}
.brand-logo img { width: 100%; height: 100%; object-fit: cover; border-radius: 10px; }
.brand-name { font-size: 15px; font-weight: 700; color: #fff; white-space: nowrap; display: block; }
.brand-sub  { font-size: 11px; color: rgba(255,255,255,.4); white-space: nowrap; display: block; }

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 10px 0;
}
.sidebar-nav::-webkit-scrollbar { width: 3px; }
.sidebar-nav::-webkit-scrollbar-thumb { background: rgba(255,255,255,.12); border-radius: 3px; }

.nav-section {
  padding: 10px 18px 4px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: rgba(255,255,255,.28);
  white-space: nowrap;
}
.nav-link {
  display: flex;
  align-items: center;
  padding: 10px 20px;
  gap: 12px;
  color: rgba(255,255,255,.6);
  font-size: 13.5px;
  font-weight: 500;
  white-space: nowrap;
  position: relative;
  transition: background .15s, color .15s;
  text-decoration: none;
}
.nav-link:hover { color: #fff; background: rgba(255,255,255,.07); }
.nav-link.active {
  color: #fff;
  background: linear-gradient(90deg, rgba(37,99,235,.65), rgba(37,99,235,.12));
}
.nav-link.active::before {
  content: '';
  position: absolute;
  left: 0; top: 5px; bottom: 5px;
  width: 3px;
  background: var(--primary);
  border-radius: 0 3px 3px 0;
}
.nav-link i { font-size: 19px; flex-shrink: 0; width: 22px; text-align: center; }

.sidebar-footer {
  padding: 14px;
  border-top: 1px solid rgba(255,255,255,.07);
  flex-shrink: 0;
}
.user-card {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background: rgba(255,255,255,.06);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.user-ava {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), #7c3aed);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 700; font-size: 14px;
  flex-shrink: 0; overflow: hidden;
}
.user-ava img { width: 100%; height: 100%; object-fit: cover; border-radius: 50%; }
.user-name {
  font-size: 13px; font-weight: 600; color: #fff;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  display: block;
}
.user-role { font-size: 11px; color: rgba(255,255,255,.38); display: block; }

/* ── Main content ── */
.main {
  flex: 1;
  margin-left: var(--sidebar-w);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-width: 0;
}

/* ── Topbar ── */
.topbar {
  height: var(--header-h);
  background: var(--card);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 24px;
  gap: 14px;
  position: sticky;
  top: 0;
  z-index: 900;
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
}
.menu-btn {
  width: 36px; height: 36px;
  border: none; background: transparent;
  cursor: pointer; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: var(--muted); font-size: 22px;
  flex-shrink: 0;
  text-decoration: none;
  transition: background .15s, color .15s;
}
.menu-btn:hover { background: var(--bg); color: var(--text); }
.page-title { font-size: 17px; font-weight: 700; flex: 1; color: var(--text); }
.topbar-right { display: flex; align-items: center; gap: 8px; }

/* Language switcher */
.lang-sw {
  display: flex;
  background: var(--bg);
  border-radius: 20px;
  padding: 3px;
}
.lang-sw a {
  padding: 4px 11px;
  border-radius: 16px;
  font-size: 12px;
  font-weight: 700;
  color: var(--muted);
  transition: all .15s;
  text-decoration: none;
}
.lang-sw a.on { background: var(--primary); color: #fff; }

/* Theme & icon buttons */
.icon-btn {
  width: 36px; height: 36px;
  border: none; background: transparent;
  cursor: pointer; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: var(--muted); font-size: 20px;
  text-decoration: none;
  transition: background .15s, color .15s;
}
.icon-btn:hover { background: var(--bg); color: var(--primary); }

/* User dropdown — CSS :focus-within */
.user-dd { position: relative; }
.user-dd-btn {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), #7c3aed);
  border: none; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 700; font-size: 14px;
  overflow: hidden; flex-shrink: 0;
}
.user-dd-btn img { width: 100%; height: 100%; object-fit: cover; border-radius: 50%; }
.user-dd:focus-within .dd-menu,
.user-dd:hover .dd-menu {
  opacity: 1; visibility: visible; transform: translateY(0);
}
.dd-menu {
  position: absolute;
  top: calc(100% + 8px); right: 0;
  min-width: 200px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  z-index: 500;
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity .15s, transform .15s, visibility .15s;
}
.dd-head { padding: 12px 16px; border-bottom: 1px solid var(--border); }
.dd-name  { font-weight: 700; font-size: 14px; }
.dd-email { font-size: 12px; color: var(--muted); }
.dd-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 16px;
  font-size: 13.5px;
  color: var(--text);
  text-decoration: none;
  transition: background .12s;
  border: none;
  background: transparent;
  width: 100%;
  text-align: left;
  cursor: pointer;
  font-family: inherit;
}
.dd-item:hover { background: var(--bg); }
.dd-item.red:hover { background: #fee2e2; color: var(--danger); }
.dd-divider { height: 1px; background: var(--border); margin: 4px 0; }

/* ── Page body ── */
.page-body { flex: 1; padding: 24px; }

/* ── Cards ── */
.card {
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.card-head {
  padding: 16px 22px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.card-title {
  font-size: 15px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
}
.card-title i { color: var(--primary); }
.card-body { padding: 22px; }

/* ── Stat cards ── */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 18px;
  margin-bottom: 24px;
}
.stat {
  background: var(--card);
  border-radius: var(--radius);
  padding: 20px 22px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  gap: 16px;
  transition: transform .15s, box-shadow .15s;
}
.stat:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.stat-ico {
  width: 52px; height: 52px;
  border-radius: 13px;
  display: flex; align-items: center; justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}
.ico-blue   { background: #dbeafe; color: #2563eb; }
.ico-green  { background: #d1fae5; color: #10b981; }
.ico-orange { background: #fef3c7; color: #f59e0b; }
.ico-red    { background: #fee2e2; color: #ef4444; }
.ico-purple { background: #ede9fe; color: #7c3aed; }
.ico-teal   { background: #ccfbf1; color: #0d9488; }
.stat-val { font-size: 22px; font-weight: 800; line-height: 1; margin-bottom: 3px; }
.stat-lbl { font-size: 12.5px; color: var(--muted); }
.stat-chg { font-size: 12px; margin-top: 3px; }
.up   { color: #10b981; }
.down { color: #ef4444; }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 9px 16px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  font-family: inherit;
  text-decoration: none;
  transition: filter .15s, transform .12s, box-shadow .15s;
  line-height: 1.4;
}
.btn:hover { filter: brightness(1.08); transform: translateY(-1px); }
.btn:active { transform: translateY(0); filter: brightness(.97); }
.btn:disabled { opacity: .6; pointer-events: none; }

.btn-primary   { background: var(--primary);  color: #fff; }
.btn-success   { background: var(--success);  color: #fff; }
.btn-danger    { background: var(--danger);   color: #fff; }
.btn-warning   { background: var(--warning);  color: #fff; }
.btn-secondary { background: var(--bg); color: var(--text); border: 1px solid var(--border); }
.btn-outline   { background: transparent; border: 1.5px solid var(--primary); color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; }

.btn-sm  { padding: 5px 11px; font-size: 12px; border-radius: 6px; }
.btn-lg  { padding: 13px 26px; font-size: 15px; }
.btn-icon { padding: 7px; border-radius: 7px; }
.btn-block { width: 100%; display: flex; }

/* ── Forms ── */
.fg { margin-bottom: 16px; }
.lbl {
  display: block;
  margin-bottom: 5px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
}
.req { color: var(--danger); margin-left: 2px; }
.inp {
  width: 100%;
  padding: 9px 13px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--card);
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: border-color .15s, box-shadow .15s;
  appearance: auto;
}
.inp:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,.1);
}
.inp::placeholder { color: var(--light); }
select.inp { cursor: pointer; }
textarea.inp { resize: vertical; min-height: 80px; }
.hint { font-size: 12px; color: var(--muted); margin-top: 3px; }

.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.row3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 14px; }

/* ── Tables ── */
.tbl-wrap { overflow-x: auto; }
.tbl { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.tbl th {
  padding: 11px 14px;
  text-align: left;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .6px;
  color: var(--muted);
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.tbl td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
.tbl tbody tr:last-child td { border-bottom: none; }
.tbl tbody tr:hover { background: rgba(37,99,235,.025); }

/* ── Badges ── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 9px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 700;
  white-space: nowrap;
}
.bg-success   { background: #d1fae5; color: #065f46; }
.bg-danger    { background: #fee2e2; color: #991b1b; }
.bg-warning   { background: #fef3c7; color: #92400e; }
.bg-info      { background: #dbeafe; color: #1e40af; }
.bg-secondary { background: var(--bg); color: var(--muted); }
.bg-purple    { background: #ede9fe; color: #5b21b6; }

/* ── Alerts ── */
.alert {
  padding: 13px 16px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13.5px;
  border-left: 4px solid;
  animation: fadeIn .3s ease;
}
.alert-success { background: #d1fae5; color: #065f46; border-color: #10b981; }
.alert-error   { background: #fee2e2; color: #991b1b; border-color: #ef4444; }
.alert-info    { background: #dbeafe; color: #1e40af; border-color: #3b82f6; }
@keyframes fadeIn { from { opacity:0; transform:translateY(-5px); } to { opacity:1; transform:translateY(0); } }

/* ── Filter bar ── */
.fbar {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 14px;
}
.fbar .inp { max-width: 200px; }
.search-wrap { position: relative; flex: 1; min-width: 160px; }
.search-wrap i {
  position: absolute;
  left: 10px; top: 50%;
  transform: translateY(-50%);
  color: var(--muted);
  font-size: 17px;
  pointer-events: none;
}
.search-wrap .inp { padding-left: 36px; }

/* ── Pagination ── */
.pages { display: flex; align-items: center; gap: 5px; flex-wrap: wrap; }
.page-a {
  min-width: 34px; height: 34px;
  display: flex; align-items: center; justify-content: center;
  border: 1.5px solid var(--border);
  border-radius: 7px;
  background: var(--card);
  color: var(--text);
  font-size: 13px; font-weight: 600;
  text-decoration: none;
  transition: all .12s;
}
.page-a:hover, .page-a.on { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ── Modal — CSS :target ── */
.modal-bg {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.52);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  padding: 16px;
  backdrop-filter: blur(3px);
}
.modal-bg:target { display: flex; }
.modal-box {
  background: var(--card);
  border-radius: var(--radius);
  width: 100%;
  max-width: 580px;
  max-height: 92vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg);
  animation: modalIn .2s ease;
}
@keyframes modalIn { from { opacity:0; transform:scale(.96) translateY(10px); } to { opacity:1; transform:scale(1) translateY(0); } }
.modal-lg  { max-width: 820px; }
.modal-xl  { max-width: 1080px; }
.modal-head {
  padding: 16px 22px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}
.modal-title { font-size: 16px; font-weight: 700; }
.modal-close {
  display: flex; align-items: center; justify-content: center;
  width: 30px; height: 30px;
  border-radius: 7px;
  background: var(--bg);
  color: var(--muted);
  text-decoration: none;
  font-size: 17px; font-weight: 700;
  transition: background .12s;
  flex-shrink: 0;
}
.modal-close:hover { background: #fee2e2; color: var(--danger); }
.modal-body  { padding: 22px; overflow-y: auto; flex: 1; }
.modal-foot  {
  padding: 14px 22px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  flex-wrap: wrap;
  flex-shrink: 0;
}

/* ── Empty state ── */
.empty { text-align: center; padding: 44px 20px; color: var(--muted); }
.empty i { font-size: 52px; margin-bottom: 14px; display: block; opacity: .3; }
.empty h3 { font-size: 17px; font-weight: 700; color: var(--text); margin-bottom: 6px; }

/* ── Invoice ── */
.inv-wrap {
  max-width: 780px;
  margin: 0 auto;
  background: #fff;
  padding: 36px;
  font-family: 'Hind Siliguri', sans-serif;
}
.inv-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 28px;
  gap: 16px;
}
.inv-logo { width: 72px; height: 72px; object-fit: contain; flex-shrink: 0; border-radius: 10px; }
.inv-biz h1 { font-size: 19px; font-weight: 800; color: #2563eb; margin-bottom: 3px; }
.inv-biz p  { font-size: 12px; color: #64748b; margin-top: 2px; }
.inv-right  { text-align: right; flex-shrink: 0; }
.inv-right h2 { font-size: 24px; font-weight: 900; color: #2563eb; letter-spacing: 2px; }
.inv-divider { height: 2px; background: linear-gradient(90deg,#2563eb,#7c3aed); border-radius: 2px; margin: 18px 0; }
.inv-info { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 24px; }
.inv-info-block h4 { font-size: 11px; text-transform: uppercase; letter-spacing: .8px; color: #94a3b8; margin-bottom: 5px; }
.inv-tbl { width: 100%; border-collapse: collapse; margin-bottom: 20px; }
.inv-tbl th { background: #2563eb; color: #fff; padding: 9px 13px; text-align: left; font-size: 12px; font-weight: 700; }
.inv-tbl td { padding: 9px 13px; border-bottom: 1px solid #e2e8f0; font-size: 13px; }
.inv-tbl tbody tr:nth-child(even) { background: #f8fafc; }
.inv-totals { display: flex; justify-content: flex-end; margin-bottom: 20px; }
.inv-totals table { width: 260px; font-size: 13px; }
.inv-grand  { font-size: 17px; font-weight: 800; color: #2563eb; border-top: 2px solid #e2e8f0; }
.inv-footer { text-align: center; padding-top: 16px; border-top: 1px dashed #e2e8f0; color: #94a3b8; font-size: 12px; }

/* ── POS ── */
.pos-wrap {
  display: grid;
  grid-template-columns: 1fr 370px;
  gap: 18px;
  height: calc(100vh - var(--header-h) - 50px);
}
.pos-left { display: flex; flex-direction: column; gap: 14px; min-height: 0; }
.prod-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(155px, 1fr));
  gap: 11px;
  overflow-y: auto;
  flex: 1;
}
.prod-grid::-webkit-scrollbar { width: 4px; }
.prod-grid::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
.prod-card {
  background: var(--card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 13px 11px;
  cursor: pointer;
  text-align: center;
  transition: border-color .12s, box-shadow .12s, transform .1s;
}
.prod-card:hover {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px #dbeafe;
  transform: translateY(-2px);
}
.prod-img {
  width: 56px; height: 56px;
  border-radius: 8px;
  margin: 0 auto 9px;
  background: var(--bg);
  display: flex; align-items: center; justify-content: center;
  font-size: 26px;
  overflow: hidden;
}
.prod-img img { width: 100%; height: 100%; object-fit: cover; border-radius: 8px; }
.prod-name  { font-size: 12px; font-weight: 600; margin-bottom: 3px; line-height: 1.3; }
.prod-price { font-size: 13px; font-weight: 800; color: var(--primary); }
.prod-stock { font-size: 11px; color: var(--muted); margin-top: 2px; }
.low-stock  { color: var(--danger); }

/* Cart */
.cart {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  height: 100%;
}
.cart-head {
  padding: 14px 16px;
  background: var(--secondary);
  color: #fff;
  font-weight: 700;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}
.cart-items { flex: 1; overflow-y: auto; padding: 8px; }
.cart-items::-webkit-scrollbar { width: 3px; }
.cart-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 7px;
  border-bottom: 1px solid var(--border);
}
.cart-row:last-child { border-bottom: none; }
.cart-name  { flex: 1; font-size: 12px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cart-price { font-size: 11px; color: var(--muted); }
.qty-box    { display: flex; align-items: center; gap: 5px; }
.qty-btn {
  width: 24px; height: 24px;
  border: 1.5px solid var(--border);
  background: var(--bg);
  border-radius: 5px;
  cursor: pointer;
  font-weight: 700; font-size: 13px;
  display: flex; align-items: center; justify-content: center;
  text-decoration: none;
  color: var(--text);
  transition: all .12s;
  user-select: none;
}
.qty-btn:hover { background: var(--primary); color: #fff; border-color: var(--primary); }
.qty-in {
  width: 40px; text-align: center;
  border: 1.5px solid var(--border);
  border-radius: 5px;
  padding: 2px 3px;
  font-size: 12px; font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
  background: var(--card);
  color: var(--text);
}
.cart-total { font-size: 12px; font-weight: 700; min-width: 60px; text-align: right; }
.rm-btn {
  color: var(--danger);
  font-size: 16px;
  cursor: pointer;
  flex-shrink: 0;
  text-decoration: none;
  line-height: 1;
  padding: 2px;
}
.cart-sum {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  background: var(--bg);
  flex-shrink: 0;
}
.sum-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 4px 0;
  font-size: 13px;
}
.sum-row.grand {
  font-weight: 800; font-size: 17px;
  border-top: 2px solid var(--border);
  padding-top: 9px; margin-top: 4px;
  color: var(--primary);
}
.sum-inp {
  width: 95px; text-align: right;
  border: 1.5px solid var(--border);
  border-radius: 5px;
  padding: 3px 7px;
  font-size: 12px; font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
  background: var(--card);
  color: var(--text);
  outline: none;
}
.sum-inp:focus { border-color: var(--primary); }
.cart-acts {
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 7px;
  flex-shrink: 0;
}

/* ── Login page ── */
.login-page {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 100%);
  padding: 16px;
}
.login-card {
  background: var(--card);
  border-radius: 18px;
  padding: 36px;
  width: 100%; max-width: 400px;
  box-shadow: 0 20px 60px rgba(0,0,0,.4);
}
.login-logo  { text-align: center; margin-bottom: 26px; }
.login-ico {
  width: 68px; height: 68px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--primary), #7c3aed);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 12px;
  box-shadow: 0 8px 24px rgba(37,99,235,.4);
  overflow: hidden;
}
.login-ico img { width: 100%; height: 100%; object-fit: cover; border-radius: 16px; }
.login-ico i   { font-size: 34px; color: #fff; }
.login-title { font-size: 20px; font-weight: 800; color: var(--text); }
.login-sub   { font-size: 13px; color: var(--muted); margin-top: 3px; }

/* ── Sidebar CSS-only toggle via checkbox ── */
#sbToggle { display: none; }
.sb-backdrop {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,.5);
  z-index: 999;
  cursor: pointer;
}

/* ── Utility classes ── */
.num  { font-family: 'JetBrains Mono', monospace; font-weight: 700; }
.fw7  { font-weight: 700; }
.fw8  { font-weight: 800; }
.tc   { text-align: center; }
.tr   { text-align: right; }
.flex { display: flex; }
.ac   { align-items: center; }
.jb   { justify-content: space-between; }
.gap8  { gap: 8px; }
.gap12 { gap: 12px; }
.mt8   { margin-top: 8px; }
.mt16  { margin-top: 16px; }
.mt24  { margin-top: 24px; }
.mb16  { margin-bottom: 16px; }
.mb24  { margin-bottom: 24px; }

.text-primary { color: var(--primary); }
.text-success { color: var(--success); }
.text-danger  { color: var(--danger);  }
.text-muted   { color: var(--muted);   }

/* ── Scrollbar ── */
::-webkit-scrollbar        { width: 6px; height: 6px; }
::-webkit-scrollbar-track  { background: transparent; }
::-webkit-scrollbar-thumb  { background: var(--border); border-radius: 4px; }

/* ═══════════════════════════════════════════════
   RESPONSIVE
═══════════════════════════════════════════════ */

/* 1200px */
@media (max-width: 1200px) {
  .pos-wrap  { grid-template-columns: 1fr 330px; }
  .stats { grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); }
}

/* 1024px */
@media (max-width: 1024px) {
  :root { --sidebar-w: 240px; }
  .row3 { grid-template-columns: 1fr 1fr; }
  .pos-wrap { grid-template-columns: 1fr 300px; }
}

/* 768px — mobile breakpoint */
@media (max-width: 768px) {
  :root { --sidebar-w: 260px; --header-h: 56px; }

  /* Sidebar slides off-screen, toggled via checkbox */
  .sidebar { transform: translateX(-100%); }
  #sbToggle:checked ~ .sb-backdrop { display: block; }
  #sbToggle:checked ~ .app .sidebar { transform: translateX(0); }

  /* Main content full-width */
  .main { margin-left: 0 !important; }
  .page-body { padding: 14px; }

  .stats { grid-template-columns: 1fr 1fr; gap: 12px; }
  .stat { padding: 14px 16px; }
  .stat-val { font-size: 19px; }
  .stat-ico { width: 44px; height: 44px; font-size: 19px; }

  /* POS stacks vertically */
  .pos-wrap { grid-template-columns: 1fr; height: auto; }
  .pos-left { min-height: 0; }
  .prod-grid { max-height: 42vh; }
  .cart   { max-height: 55vh; }

  .row2, .row3 { grid-template-columns: 1fr; }

  .card-head { padding: 13px 15px; }
  .card-body { padding: 14px; }

  .topbar { padding: 0 14px; gap: 10px; }
  .page-title { font-size: 14px; }

  /* Filter bar stacks */
  .fbar { flex-direction: column; align-items: stretch; }
  .fbar .inp,
  .search-wrap { max-width: 100% !important; }
  .fbar .btn { width: 100%; justify-content: center; }

  /* Modal slides from bottom */
  .modal-bg:target { align-items: flex-end; padding: 0; }
  .modal-box { max-width: 100%; border-radius: var(--radius) var(--radius) 0 0; max-height: 95vh; }

  .inv-wrap  { padding: 16px; }
  .inv-head  { flex-direction: column; }
  .inv-right { text-align: left; }
  .inv-info  { grid-template-columns: 1fr; }

  .tbl th, .tbl td { padding: 9px 10px; font-size: 12.5px; }
}

/* 480px */
@media (max-width: 480px) {
  .stats { grid-template-columns: 1fr; }
  .login-card { padding: 24px 18px; }
  .prod-grid { grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); gap: 8px; }
  .prod-card { padding: 10px 8px; }
  /* Hide lang switcher in topbar (too cramped) */
  .topbar-right .lang-sw { display: none; }
  .tbl { font-size: 12px; }
  .tbl th, .tbl td { padding: 8px; }
}

/* ── Print ── */
@media print {
  .sidebar, .topbar, .no-print, #sbToggle, .sb-backdrop { display: none !important; }
  .main { margin-left: 0 !important; }
  .inv-wrap { box-shadow: none; padding: 0; }
  body { background: #fff; }
}

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

/* ── Sidebar always visible on desktop ── */
@media (min-width: 769px) {
  #sbToggle, .sb-backdrop { display: none !important; }
  .sidebar { transform: translateX(0) !important; }
  .main    { margin-left: var(--sidebar-w) !important; }
  /* Hide menu button on desktop — or keep it for collapse (optional) */
}