/* =====================================================
   Binbir Çeşit POS · Design System v3
   Direction: Data-Dense Dashboard · Operations grade
   Palette: Indigo + Amber (WCAG AA verified)
   Typography: Inter + JetBrains Mono
   ===================================================== */

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

:root {
  /* ====== Color tokens — semantic ====== */
  --bg:             #f8fafc;
  --bg-elevated:    #ffffff;
  --surface:        #ffffff;
  --surface-2:      #f1f5f9;
  --surface-3:      #e2e8f0;
  --overlay:        rgba(15, 23, 42, .55);

  --border:         #e2e8f0;
  --border-strong:  #cbd5e1;
  --border-focus:   #1e40af;

  --fg:             #0f172a;
  --fg-soft:        #334155;
  --fg-muted:       #64748b;
  --fg-subtle:      #94a3b8;
  --fg-on-dark:     #f1f5f9;

  /* Brand: Indigo (primary data color) */
  --primary:        #1e40af;
  --primary-hover:  #1e3a8a;
  --primary-active: #1e3a8a;
  --primary-100:    #dbeafe;
  --primary-200:    #bfdbfe;
  --primary-fg:     #ffffff;
  --primary-soft:   #eff6ff;

  /* Accent: Amber (price + retail CTA) */
  --accent:         #d97706;
  --accent-hover:   #b45309;
  --accent-100:     #fef3c7;
  --accent-soft:    #fffbeb;

  --success:        #15803d;
  --success-100:    #dcfce7;
  --success-soft:   #f0fdf4;
  --warn:           #b45309;
  --warn-100:       #fef3c7;
  --warn-soft:      #fffbeb;
  --danger:         #b91c1c;
  --danger-hover:   #991b1b;
  --danger-100:     #fee2e2;
  --danger-soft:    #fef2f2;

  /* Sidebar */
  --side:           #0f172a;
  --side-2:         #1e293b;
  --side-fg:        #cbd5e1;
  --side-muted:     #64748b;

  /* ====== Shadows ====== */
  --shadow-xs:  0 1px 2px rgba(15, 23, 42, .04);
  --shadow-sm:  0 1px 3px rgba(15, 23, 42, .06), 0 1px 2px rgba(15, 23, 42, .04);
  --shadow-md:  0 4px 8px -2px rgba(15, 23, 42, .08), 0 2px 4px -2px rgba(15, 23, 42, .04);
  --shadow-lg:  0 12px 24px -8px rgba(15, 23, 42, .12), 0 4px 8px -4px rgba(15, 23, 42, .06);
  --shadow-xl:  0 24px 48px -12px rgba(15, 23, 42, .18);
  --ring:       0 0 0 3px rgba(30, 64, 175, .15);
  --ring-amber: 0 0 0 3px rgba(217, 119, 6, .15);
  --ring-danger: 0 0 0 3px rgba(185, 28, 28, .15);

  /* ====== Radius ====== */
  --r-xs: 4px;
  --r-sm: 6px;
  --r:    8px;
  --r-md: 10px;
  --r-lg: 14px;
  --r-xl: 20px;
  --r-full: 9999px;

  /* ====== Spacing scale (4pt base) ====== */
  --s-1: 4px;
  --s-2: 8px;
  --s-3: 12px;
  --s-4: 16px;
  --s-5: 20px;
  --s-6: 24px;
  --s-8: 32px;
  --s-10: 40px;

  /* ====== Layout ====== */
  --sidebar-w: 232px;
  --topbar-h: 56px;

  /* ====== Type ====== */
  --font: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, 'Cascadia Code', monospace;

  /* ====== Motion ====== */
  --ease-out:     cubic-bezier(.16, 1, .3, 1);
  --ease-in-out:  cubic-bezier(.65, 0, .35, 1);
  --t-fast:       120ms;
  --t-base:       180ms;
  --t-slow:       260ms;
}

/* =========================================================
   RESET & GLOBALS
   ========================================================= */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

/* CRITICAL: hidden attribute override */
[hidden] { display: none !important; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

body {
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.5;
  background: var(--bg);
  color: var(--fg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: 'cv02', 'cv03', 'cv04', 'cv11';
}

a { color: var(--primary); text-decoration: none; transition: color var(--t-fast); }
a:hover { color: var(--primary-hover); text-decoration: underline; text-underline-offset: 2px; }
a:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 2px; }

h1, h2, h3, h4, h5 { margin: 0; color: var(--fg); font-weight: 600; letter-spacing: -0.015em; }
h1 { font-size: 22px; line-height: 1.2; font-weight: 700; letter-spacing: -0.025em; }
h2 { font-size: 17px; line-height: 1.3; }
h3 { font-size: 14px; line-height: 1.4; font-weight: 600; }
h4 { font-size: 13px; }
p { margin: 0; }

button { font-family: inherit; font-size: inherit; }
input, select, textarea {
  font-family: inherit; font-size: inherit;
}
input[type=number] { -moz-appearance: textfield; }
input[type=number]::-webkit-outer-spin-button,
input[type=number]::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }

::selection { background: var(--primary-100); color: var(--fg); }

/* Scrollbars */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 99px; border: 2px solid transparent; background-clip: padding-box; }
::-webkit-scrollbar-thumb:hover { background-color: var(--fg-subtle); background-clip: padding-box; }

/* =========================================================
   LAYOUT
   ========================================================= */
.bss-sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: var(--sidebar-w);
  background: var(--side);
  color: var(--side-fg);
  display: flex; flex-direction: column;
  z-index: 50;
  transform: translateX(0);
  transition: transform var(--t-base) var(--ease-out);
}

.bss-brand {
  padding: 18px 18px;
  display: flex; align-items: center; gap: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, .06);
}
.bss-brand-icon {
  width: 36px; height: 36px;
  background: linear-gradient(135deg, var(--accent) 0%, #f59e0b 100%);
  color: #fff;
  border-radius: var(--r);
  display: grid; place-items: center;
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -0.02em;
  box-shadow: 0 2px 8px rgba(217, 119, 6, .35);
}
.bss-brand-text { line-height: 1.25; min-width: 0; flex: 1; }
.bss-brand-text strong {
  display: block;
  font-size: 14px; font-weight: 600;
  color: #fff;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  letter-spacing: -0.01em;
}
.bss-brand-text span {
  font-size: 11px;
  color: var(--side-muted);
  font-weight: 500;
  font-family: var(--font-mono);
}

.bss-nav {
  flex: 1; padding: 10px 8px; overflow-y: auto;
  display: flex; flex-direction: column; gap: 2px;
}
.bss-nav-section {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--side-muted);
  font-weight: 600;
  padding: 14px 12px 6px;
}
.bss-nav a {
  display: flex; align-items: center; gap: 11px;
  padding: 8px 10px;
  color: var(--side-fg);
  border-radius: var(--r-sm);
  font-size: 13px;
  font-weight: 500;
  transition: background var(--t-fast), color var(--t-fast);
  position: relative;
}
.bss-nav a svg {
  width: 17px; height: 17px;
  opacity: .7;
  flex-shrink: 0;
  transition: opacity var(--t-fast);
}
.bss-nav a:hover {
  background: rgba(255, 255, 255, .06);
  color: #fff;
  text-decoration: none;
}
.bss-nav a:hover svg { opacity: 1; }
.bss-nav a.active {
  background: rgba(30, 64, 175, .25);
  color: #fff;
  font-weight: 600;
}
.bss-nav a.active::before {
  content: '';
  position: absolute;
  left: -8px; top: 6px; bottom: 6px;
  width: 3px;
  background: var(--accent);
  border-radius: 0 2px 2px 0;
}
.bss-nav a.active svg { opacity: 1; color: var(--accent); }

.bss-nav-badge {
  margin-left: auto;
  background: var(--danger);
  color: white;
  font-size: 10px;
  font-weight: 700;
  padding: 1px 6px;
  border-radius: 99px;
  font-family: var(--font-mono);
}

.bss-sidebar-footer {
  padding: 12px 18px;
  border-top: 1px solid rgba(255, 255, 255, .06);
  font-size: 11px;
  color: var(--side-muted);
  display: flex; align-items: center; gap: 6px;
}
.bss-sidebar-footer .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 2px rgba(21, 128, 61, .2);
}

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

.bss-topbar {
  display: flex; align-items: center; gap: 16px;
  padding: 0 24px;
  height: var(--topbar-h);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 30;
  backdrop-filter: saturate(150%) blur(8px);
}
.bss-topbar-title {
  flex: 1;
  display: flex; align-items: center; gap: 8px;
  font-size: 14px; font-weight: 600;
  color: var(--fg);
}
.bss-breadcrumb {
  display: flex; align-items: center; gap: 6px;
  font-size: 13px; color: var(--fg-muted);
}
.bss-breadcrumb a { color: var(--fg-muted); font-weight: 500; }
.bss-breadcrumb .sep { color: var(--fg-subtle); }
.bss-breadcrumb .current { color: var(--fg); font-weight: 600; }

.bss-time {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-muted);
  font-variant-numeric: tabular-nums;
  padding: 5px 10px;
  background: var(--surface-2);
  border-radius: var(--r-sm);
  border: 1px solid var(--border);
}
.bss-time::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 2px rgba(21, 128, 61, .2);
}

.bss-burger {
  display: none;
  width: 36px; height: 36px;
  background: none; border: 1px solid var(--border);
  border-radius: var(--r-sm);
  cursor: pointer;
  align-items: center; justify-content: center;
  color: var(--fg-soft);
}
.bss-burger:hover { background: var(--surface-2); }

.bss-content { flex: 1; padding: 24px 28px 48px; }

/* =========================================================
   POS
   ========================================================= */
.bss-pos-body .bss-content { padding: 16px; }
.bss-pos {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 408px;
  gap: 16px;
  height: calc(100vh - var(--topbar-h) - 32px);
}
.bss-pos-left { display: flex; flex-direction: column; gap: 12px; min-height: 0; }
.bss-pos-right {
  background: var(--surface);
  border-radius: var(--r-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  display: flex; flex-direction: column;
  min-height: 0;
  overflow: hidden;
}

/* Scanner */
.bss-scanner {
  background: linear-gradient(135deg, var(--side) 0%, var(--side-2) 100%);
  color: var(--fg-on-dark);
  border-radius: var(--r-lg);
  padding: 18px;
  position: relative;
  overflow: hidden;
}
.bss-scanner::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 90% 0%, rgba(217, 119, 6, .15) 0%, transparent 40%),
    radial-gradient(circle at 0% 100%, rgba(30, 64, 175, .2) 0%, transparent 40%);
  pointer-events: none;
}
.bss-scanner > * { position: relative; }
.bss-scanner-label {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 11px; font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: rgba(255, 255, 255, .85);
  margin-bottom: 10px;
}
.bss-scanner-label::before {
  content: '';
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 4px rgba(21, 128, 61, .25);
  animation: bss-scan-pulse 2s ease-in-out infinite;
}
@keyframes bss-scan-pulse {
  0%, 100% { box-shadow: 0 0 0 4px rgba(21, 128, 61, .25); }
  50%      { box-shadow: 0 0 0 8px rgba(21, 128, 61, .05); }
}
.bss-scanner-input {
  width: 100%;
  padding: 14px 16px;
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .14);
  border-radius: var(--r);
  color: #fff;
  font-size: 16px;
  font-weight: 500;
  font-family: var(--font-mono);
  letter-spacing: .03em;
  outline: none;
  transition: all var(--t-fast);
}
.bss-scanner-input::placeholder {
  color: var(--side-muted);
  font-family: var(--font);
  font-weight: 400;
  letter-spacing: 0;
}
.bss-scanner-input:focus {
  border-color: var(--accent);
  background: rgba(255, 255, 255, .1);
  box-shadow: 0 0 0 3px rgba(217, 119, 6, .25);
}
.bss-scanner-hint {
  display: flex; gap: 14px; flex-wrap: wrap;
  margin-top: 10px;
  font-size: 11px; color: var(--side-muted);
}
.bss-scanner-hint kbd {
  font-family: var(--font-mono);
  background: rgba(255, 255, 255, .08);
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 10px;
  border: 1px solid rgba(255, 255, 255, .12);
  color: rgba(255, 255, 255, .9);
  font-weight: 500;
}

/* Scanned product card */
.bss-scanned-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 16px 18px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 18px;
  align-items: center;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
  animation: bss-card-in var(--t-base) var(--ease-out);
}
@keyframes bss-card-in {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}
.bss-scanned-card.flash {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(217, 119, 6, .12), var(--shadow-sm);
  transition: all 700ms var(--ease-out);
}
.bss-scanned-card .label {
  display: inline-block;
  font-size: 10px; font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 2px 8px;
  border-radius: 99px;
  margin-bottom: 6px;
}
.bss-scanned-card .name {
  font-size: 18px; font-weight: 600;
  color: var(--fg);
  line-height: 1.25;
  letter-spacing: -0.015em;
  margin-bottom: 8px;
}
.bss-scanned-card .meta {
  display: flex; gap: 10px; flex-wrap: wrap; align-items: center;
  font-size: 12px; color: var(--fg-muted);
}
.bss-scanned-card .meta code {
  font-family: var(--font-mono);
  background: var(--surface-2);
  padding: 2px 7px;
  border-radius: var(--r-xs);
  color: var(--fg-soft);
  font-size: 11px;
  border: 1px solid var(--border);
  font-weight: 500;
}
.bss-scanned-card .stock-badge {
  display: inline-flex; align-items: center; gap: 5px;
  font-weight: 500;
}
.bss-scanned-card .stock-badge svg { width: 8px; height: 8px; }
.bss-scanned-card .stock-badge.low { color: var(--danger); }
.bss-scanned-card .stock-badge.ok { color: var(--success); }

.bss-scanned-card .price {
  text-align: right;
  padding-left: 18px;
  border-left: 1px solid var(--border);
}
.bss-scanned-card .price small {
  display: block;
  font-size: 10px; font-weight: 600;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-bottom: 2px;
}
.bss-scanned-card .price-amount {
  font-size: 30px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  letter-spacing: -0.025em;
  font-variant-numeric: tabular-nums;
}
.bss-scanned-card .vat-line {
  font-size: 11px;
  color: var(--fg-subtle);
  margin-top: 4px;
  font-family: var(--font-mono);
}

/* Suggestions */
.bss-suggestions {
  margin-top: 8px;
  max-height: 340px;
  overflow: auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  box-shadow: var(--shadow-md);
}
.bss-suggestion {
  display: grid;
  grid-template-columns: 1fr 130px 96px 64px;
  gap: 12px; align-items: center;
  padding: 10px 14px;
  width: 100%;
  background: none; border: 0;
  text-align: left;
  cursor: pointer;
  border-bottom: 1px solid var(--border);
  font-family: inherit;
  transition: background var(--t-fast);
}
.bss-suggestion:last-child { border-bottom: 0; }
.bss-suggestion:hover { background: var(--primary-soft); }
.bss-suggestion .name { font-weight: 500; color: var(--fg); }
.bss-suggestion .bar { font-family: var(--font-mono); color: var(--fg-muted); font-size: 11px; }
.bss-suggestion .price { font-weight: 700; color: var(--accent); font-size: 14px; font-variant-numeric: tabular-nums; }
.bss-suggestion .stk { font-size: 11px; color: var(--fg-muted); text-align: right; font-family: var(--font-mono); }
.bss-suggestion-empty {
  padding: 22px; text-align: center;
  color: var(--fg-muted); font-size: 13px;
}

/* Cards */
.bss-card {
  background: var(--surface);
  border-radius: var(--r-lg);
  padding: 16px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-xs);
}
.bss-card-flex { flex: 1; min-height: 0; display: flex; flex-direction: column; }
.bss-card-head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 12px;
  gap: 8px;
}
.bss-card-head h3 {
  font-size: 13px; font-weight: 600;
  color: var(--fg);
  display: flex; align-items: center; gap: 8px;
}
.bss-card-head h3::before {
  content: '';
  display: inline-block;
  width: 3px; height: 14px;
  background: var(--accent);
  border-radius: 2px;
}

/* Quick grid */
.bss-quick-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 8px;
  overflow-y: auto;
  padding-right: 4px;
  flex: 1; min-height: 0;
  align-content: start;
}
.bss-quick-item {
  display: flex; flex-direction: column; gap: 6px;
  padding: 11px 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  cursor: pointer;
  text-align: left;
  min-height: 78px;
  font-family: inherit;
  transition: all var(--t-fast);
  position: relative;
}
.bss-quick-item:hover {
  border-color: var(--primary);
  box-shadow: var(--ring), var(--shadow-xs);
  transform: translateY(-1px);
}
.bss-quick-item:active { transform: translateY(0); }
.bss-quick-item .name {
  font-weight: 500; font-size: 13px; line-height: 1.3;
  color: var(--fg);
}
.bss-quick-item .meta {
  margin-top: auto;
  display: flex; justify-content: space-between; align-items: flex-end;
  gap: 8px;
}
.bss-quick-item .price {
  color: var(--accent);
  font-weight: 700;
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}
.bss-quick-item .stock {
  font-size: 10px;
  color: var(--fg-muted);
  font-weight: 600;
  font-family: var(--font-mono);
}
.bss-quick-item .stock.low { color: var(--danger); }

/* =========================================================
   CART
   ========================================================= */
.bss-cart-head {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  background: var(--surface);
}
.bss-cart-head h2 {
  font-size: 16px; font-weight: 700;
  display: flex; align-items: center; gap: 10px;
}
.bss-cart-head h2 .count-badge {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 22px; height: 22px;
  padding: 0 7px;
  background: var(--fg);
  color: white;
  font-size: 11px; font-weight: 600;
  font-family: var(--font-mono);
  border-radius: var(--r-full);
}

.bss-cart {
  flex: 1; overflow-y: auto;
  padding: 10px 12px;
  display: flex; flex-direction: column; gap: 6px;
  background: var(--surface-2);
}
.bss-cart-empty {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 50px 20px;
  color: var(--fg-muted);
  text-align: center;
  flex: 1;
  gap: 14px;
}
.bss-cart-empty .icon {
  width: 56px; height: 56px;
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid var(--border);
  display: grid; place-items: center;
  color: var(--fg-subtle);
  box-shadow: var(--shadow-xs);
}
.bss-cart-empty .icon svg { width: 24px; height: 24px; }
.bss-cart-empty p {
  margin: 0;
  font-size: 14px; font-weight: 600;
  color: var(--fg-soft);
}
.bss-cart-empty small {
  font-size: 12px;
  color: var(--fg-muted);
  max-width: 200px;
}

.bss-cart-item {
  display: grid;
  grid-template-columns: 1fr auto auto auto;
  gap: 10px;
  align-items: center;
  padding: 10px 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  transition: border-color var(--t-fast);
}
.bss-cart-item:hover { border-color: var(--border-strong); }
.bss-cart-item.just-added {
  animation: bss-cart-pulse .6s var(--ease-out);
  border-color: var(--accent);
}
@keyframes bss-cart-pulse {
  0%   { box-shadow: 0 0 0 0 rgba(217, 119, 6, .35); }
  100% { box-shadow: 0 0 0 6px rgba(217, 119, 6, 0); }
}

.bss-cart-item .ci-main strong {
  display: block;
  font-size: 13px; font-weight: 500;
  color: var(--fg);
  line-height: 1.3;
}
.bss-cart-item .ci-main small {
  color: var(--fg-muted);
  font-size: 11px;
  font-family: var(--font-mono);
}

.bss-cart-item .ci-qty {
  display: flex; align-items: center;
  border: 1px solid var(--border);
  border-radius: var(--r-xs);
  background: var(--surface);
  overflow: hidden;
}
.bss-cart-item .qty-btn {
  width: 28px; height: 28px;
  background: var(--surface);
  border: 0;
  cursor: pointer;
  font-size: 14px; font-weight: 600;
  color: var(--fg-soft);
  transition: background var(--t-fast), color var(--t-fast);
}
.bss-cart-item .qty-btn:hover { background: var(--primary-soft); color: var(--primary); }
.bss-cart-item .qty-input {
  width: 38px; height: 28px;
  padding: 0; text-align: center;
  background: var(--surface);
  border: 0;
  border-left: 1px solid var(--border);
  border-right: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--fg);
}
.bss-cart-item .qty-input:focus { outline: none; background: var(--primary-soft); }

.bss-cart-item .ci-price {
  text-align: right;
  font-size: 14px; font-weight: 600;
  color: var(--fg);
  font-variant-numeric: tabular-nums;
}
.bss-cart-item .ci-price small {
  display: block;
  font-size: 10px;
  color: var(--fg-muted);
  font-weight: 500;
  margin-bottom: 1px;
}

.bss-cart-item .ci-remove {
  width: 28px; height: 28px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-xs);
  cursor: pointer;
  color: var(--fg-muted);
  font-size: 16px; line-height: 1;
  transition: all var(--t-fast);
}
.bss-cart-item .ci-remove:hover {
  background: var(--danger);
  color: white;
  border-color: var(--danger);
}

/* Cart footer */
.bss-cart-footer {
  padding: 14px 16px 16px;
  background: var(--surface);
  border-top: 1px solid var(--border);
}
.bss-cart-summary { font-variant-numeric: tabular-nums; }
.bss-cart-summary .row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 3px 0;
  font-size: 13px;
  color: var(--fg-muted);
}
.bss-cart-summary .row strong {
  color: var(--fg-soft); font-weight: 600;
}
.bss-cart-summary .row.total {
  margin-top: 8px;
  padding: 12px 0 0;
  border-top: 1px dashed var(--border-strong);
  font-size: 13px;
  color: var(--fg);
  font-weight: 600;
}
.bss-cart-summary .row.total strong {
  font-size: 24px;
  color: var(--fg);
  font-weight: 700;
  letter-spacing: -0.025em;
}

.bss-pay-row { margin: 14px 0 12px; }
.bss-pay-label {
  font-size: 11px; font-weight: 700;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-bottom: 6px;
}
.bss-pay-methods {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
}
.bss-pay-btn {
  padding: 9px 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--r-sm);
  cursor: pointer;
  font-weight: 500;
  font-size: 12px;
  color: var(--fg-soft);
  font-family: inherit;
  transition: all var(--t-fast);
  display: inline-flex; align-items: center; justify-content: center; gap: 5px;
}
.bss-pay-btn svg { width: 14px; height: 14px; }
.bss-pay-btn:hover { border-color: var(--fg); color: var(--fg); }
.bss-pay-btn.active {
  background: var(--fg);
  color: white;
  border-color: var(--fg);
}

/* =========================================================
   BUTTONS
   ========================================================= */
.bss-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 7px;
  padding: 8px 14px;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  border-radius: var(--r-sm);
  font-size: 13px;
  font-weight: 500;
  color: var(--fg);
  cursor: pointer;
  font-family: inherit;
  transition: all var(--t-fast);
  white-space: nowrap;
  min-height: 36px;
}
.bss-btn:hover { background: var(--surface-2); border-color: var(--fg-muted); }
.bss-btn:focus-visible { outline: none; box-shadow: var(--ring); }
.bss-btn svg { width: 14px; height: 14px; flex-shrink: 0; }

.bss-btn-primary {
  background: var(--primary);
  color: var(--primary-fg);
  border-color: var(--primary);
  font-weight: 600;
}
.bss-btn-primary:hover { background: var(--primary-hover); border-color: var(--primary-hover); }
.bss-btn-primary:focus-visible { box-shadow: var(--ring); }

.bss-btn-amber {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
  font-weight: 600;
}
.bss-btn-amber:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.bss-btn-amber:focus-visible { box-shadow: var(--ring-amber); }

.bss-btn-ghost {
  background: transparent;
  border-color: transparent;
  color: var(--fg-soft);
}
.bss-btn-ghost:hover { background: var(--surface-2); color: var(--fg); border-color: transparent; }

.bss-btn-danger {
  background: var(--surface);
  color: var(--danger);
  border-color: var(--border-strong);
}
.bss-btn-danger:hover { background: var(--danger); color: white; border-color: var(--danger); }

.bss-btn-xl {
  padding: 13px 20px;
  font-size: 14px; font-weight: 700;
  width: 100%;
  min-height: 48px;
  letter-spacing: .01em;
}
.bss-btn-xl[disabled] { opacity: .4; cursor: not-allowed; }
.bss-btn:disabled { opacity: .5; cursor: not-allowed; }

.bss-btn-sm {
  padding: 5px 10px;
  font-size: 12px;
  min-height: 28px;
}

/* =========================================================
   FORMS
   ========================================================= */
.bss-input {
  width: 100%;
  padding: 8px 12px;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-sm);
  font-size: 13px;
  font-family: inherit;
  color: var(--fg);
  outline: none;
  transition: all var(--t-fast);
  min-height: 36px;
}
.bss-input:hover { border-color: var(--fg-subtle); }
.bss-input:focus {
  border-color: var(--primary);
  box-shadow: var(--ring);
}
.bss-input:disabled { background: var(--surface-2); color: var(--fg-muted); cursor: not-allowed; }
.bss-input-lg { padding: 11px 14px; font-size: 14px; min-height: 42px; }
.bss-input-inline { display: inline-block; width: auto; min-width: 80px; }

textarea.bss-input { resize: vertical; line-height: 1.5; min-height: 80px; }

.bss-label {
  display: block;
  font-size: 12px; font-weight: 600;
  color: var(--fg-soft);
  margin-bottom: 5px;
}
.bss-checkbox {
  display: inline-flex; gap: 7px; align-items: center;
  user-select: none; cursor: pointer; font-size: 13px;
  color: var(--fg-soft);
}
.bss-checkbox input { width: 16px; height: 16px; accent-color: var(--primary); cursor: pointer; }

.bss-form { padding: 22px; }
.bss-form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.bss-form-grid label { display: flex; flex-direction: column; gap: 5px; font-size: 13px; }
.bss-form-grid label > span {
  font-size: 12px; font-weight: 600;
  color: var(--fg-soft);
}
.bss-form-grid label.full { grid-column: 1 / -1; }

/* =========================================================
   PAGE CHROME
   ========================================================= */
.bss-page-head {
  display: flex; align-items: flex-end; justify-content: space-between;
  margin-bottom: 22px; gap: 16px; flex-wrap: wrap;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border);
}
.bss-page-head h1 { font-size: 22px; font-weight: 700; margin: 0 0 4px; letter-spacing: -0.025em; }
.bss-page-head .muted { color: var(--fg-muted); margin: 0; font-size: 13px; }
.bss-page-actions { display: flex; gap: 8px; align-items: center; }

.bss-toolbar {
  display: flex; gap: 10px; align-items: center; flex-wrap: wrap;
  margin-bottom: 14px;
  padding: 10px 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
}
.bss-toolbar .bss-input { max-width: 320px; }
.bss-spacer { flex: 1; }

/* Tables */
.bss-table-wrap {
  overflow-x: auto;
  border-radius: var(--r);
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow-xs);
}
.bss-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}
.bss-table th, .bss-table td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.bss-table th {
  font-size: 11px; font-weight: 600;
  color: var(--fg-muted);
  background: var(--surface-2);
  white-space: nowrap;
  text-transform: uppercase;
  letter-spacing: .03em;
  position: sticky; top: 0; z-index: 1;
}
.bss-table tbody tr { transition: background var(--t-fast); }
.bss-table tbody tr:last-child td { border-bottom: 0; }
.bss-table tbody tr:hover { background: var(--primary-soft); }
.bss-table .text-right { text-align: right; }
.bss-table tfoot td { font-weight: 600; background: var(--surface-2); }
.bss-table code {
  font-family: var(--font-mono);
  font-size: 11px;
  background: var(--surface-2);
  padding: 2px 7px;
  border-radius: 3px;
  color: var(--fg-soft);
  border: 1px solid var(--border);
}

.muted { color: var(--fg-muted); }
.text-right { text-align: right; }
code {
  font-family: var(--font-mono);
  font-size: 12px;
  background: var(--surface-2);
  padding: 2px 6px;
  border-radius: 3px;
  color: var(--fg-soft);
}

/* =========================================================
   BADGES
   ========================================================= */
.badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 2px 8px;
  border-radius: var(--r-full);
  font-size: 11px; font-weight: 600;
  background: var(--surface-2);
  color: var(--fg-soft);
  white-space: nowrap;
}
.badge.ok { background: var(--success-100); color: var(--success); }
.badge.warn { background: var(--warn-100); color: var(--warn); }
.badge.muted { background: var(--surface-2); color: var(--fg-muted); }
.badge.primary { background: var(--primary-100); color: var(--primary); }
.badge.amber { background: var(--accent-100); color: var(--accent); }
.low-stock { color: var(--danger); font-weight: 700; }

/* =========================================================
   MODAL
   ========================================================= */
.bss-modal {
  position: fixed; inset: 0;
  background: var(--overlay);
  display: flex; align-items: center; justify-content: center;
  z-index: 100;
  padding: 20px;
  backdrop-filter: blur(4px);
  animation: bss-modal-bg var(--t-fast) ease-out;
}
@keyframes bss-modal-bg { from { opacity: 0; } to { opacity: 1; } }
.bss-modal-body {
  background: var(--surface);
  border-radius: var(--r-lg);
  width: 100%; max-width: 580px;
  max-height: 90vh; overflow: auto;
  box-shadow: var(--shadow-xl);
  animation: bss-modal-in var(--t-base) var(--ease-out);
}
@keyframes bss-modal-in {
  from { transform: translateY(8px) scale(.99); opacity: 0; }
  to   { transform: translateY(0) scale(1); opacity: 1; }
}
.bss-modal-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}
.bss-modal-head h3 { font-size: 16px; font-weight: 600; }
.bss-modal-close {
  background: none; border: 0;
  font-size: 18px; cursor: pointer;
  color: var(--fg-muted);
  width: 32px; height: 32px;
  border-radius: var(--r-xs);
  line-height: 1;
  display: grid; place-items: center;
  transition: all var(--t-fast);
}
.bss-modal-close:hover { background: var(--surface-2); color: var(--fg); }
.bss-modal-actions {
  padding: 14px 20px;
  display: flex; gap: 8px; justify-content: flex-end;
  border-top: 1px solid var(--border);
  background: var(--surface-2);
}

/* =========================================================
   UPLOAD
   ========================================================= */
.bss-upload {
  border: 2px dashed var(--border-strong);
  border-radius: var(--r-lg);
  padding: 44px 20px;
  text-align: center;
  cursor: pointer;
  transition: all var(--t-base);
  background: var(--surface);
}
.bss-upload:hover, .bss-upload.drag {
  border-color: var(--primary);
  background: var(--primary-soft);
}
.bss-upload-inner {
  display: flex; flex-direction: column; align-items: center; gap: 12px;
  color: var(--fg-muted);
}
.bss-upload-inner .icon-circle {
  width: 56px; height: 56px;
  background: var(--primary-soft);
  border: 1px solid var(--primary-200);
  border-radius: 50%;
  display: grid; place-items: center;
  color: var(--primary);
}
.bss-upload-inner strong {
  font-size: 16px;
  color: var(--fg);
  font-weight: 600;
}
.bss-upload-inner small { color: var(--fg-muted); font-size: 12px; }

.bss-progress {
  margin-top: 12px;
  padding: 12px 16px;
  background: var(--side);
  color: white;
  border-radius: var(--r);
  display: flex; align-items: center; gap: 12px;
  font-size: 13px;
}
.bss-progress .bar {
  flex: 1; height: 3px;
  background: rgba(255, 255, 255, .15);
  overflow: hidden;
  border-radius: 99px;
  position: relative;
}
.bss-progress .bar::after {
  content: ''; position: absolute; inset: 0;
  background: var(--accent);
  animation: bss-bar 1.2s ease-in-out infinite;
}
@keyframes bss-bar { 0% { transform: translateX(-100%); } 100% { transform: translateX(100%); } }
.bss-progress small { font-family: var(--font-mono); font-size: 11px; color: rgba(255,255,255,.7); }

/* AI review */
.bss-ai-review {
  display: grid;
  grid-template-columns: minmax(0, 360px) minmax(0, 1fr);
  gap: 16px; align-items: flex-start;
}
.bss-ai-review .preview {
  position: sticky; top: 76px;
  background: var(--surface);
  border-radius: var(--r-lg);
  border: 1px solid var(--border);
  overflow: hidden;
  box-shadow: var(--shadow-xs);
}
.bss-ai-review .preview-head {
  padding: 10px 14px;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
  font-size: 12px; font-weight: 600;
  color: var(--fg-soft);
}
.bss-ai-review .preview img,
.bss-ai-review .preview embed,
.bss-ai-review .preview iframe {
  width: 100%; height: 480px; display: block;
  background: var(--surface-2);
}
.bss-ai-review .preview-empty {
  padding: 40px; text-align: center;
  color: var(--fg-muted); font-size: 13px;
}

/* =========================================================
   STATS / KPI cards
   ========================================================= */
.bss-stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}
.bss-stat {
  background: var(--surface);
  padding: 16px 18px;
  border-radius: var(--r-lg);
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-xs);
  transition: box-shadow var(--t-fast), transform var(--t-fast);
}
.bss-stat:hover { box-shadow: var(--shadow-sm); }
.bss-stat::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--primary);
}
.bss-stat.amber::before { background: var(--accent); }
.bss-stat.success::before { background: var(--success); }
.bss-stat .lbl {
  display: flex; align-items: center; justify-content: space-between;
  font-size: 11px;
  color: var(--fg-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-bottom: 4px;
}
.bss-stat .lbl svg { width: 14px; height: 14px; opacity: .55; }
.bss-stat strong {
  display: block;
  font-size: 26px;
  color: var(--fg);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.025em;
  line-height: 1.1;
  font-weight: 700;
}
.bss-stat .delta {
  display: inline-flex; align-items: center; gap: 3px;
  margin-top: 6px;
  font-size: 11px; font-weight: 600;
  color: var(--success);
}
.bss-stat .delta.down { color: var(--danger); }

.bss-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 14px; }

/* Charts */
.bss-chart {
  display: flex; align-items: flex-end; gap: 4px;
  height: 200px; padding: 8px 0;
  overflow-x: auto;
}
.bss-chart-bar {
  flex: 1; min-width: 28px;
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  height: 100%;
}
.bss-chart-bar .bar {
  width: 70%; max-width: 32px;
  background: linear-gradient(180deg, var(--primary) 0%, var(--primary-hover) 100%);
  border-radius: 3px 3px 0 0;
  min-height: 3px;
  transition: opacity var(--t-fast);
}
.bss-chart-bar:hover .bar { opacity: .82; }
.bss-chart-bar span {
  font-size: 10px;
  color: var(--fg-muted);
  font-family: var(--font-mono);
}

/* Section title */
.bss-section-title {
  margin: 22px 0 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
  font-size: 12px;
  color: var(--fg-muted);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
}

/* Empty state */
.bss-empty {
  padding: 48px 20px;
  text-align: center;
  color: var(--fg-muted);
  font-size: 13px;
}
.bss-empty-rich {
  display: flex; flex-direction: column; align-items: center; gap: 12px;
  padding: 56px 24px;
}
.bss-empty-rich .icon-wrap {
  width: 72px; height: 72px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 50%;
  display: grid; place-items: center;
  color: var(--fg-muted);
}
.bss-empty-rich .icon-wrap svg { width: 28px; height: 28px; }
.bss-empty-rich h4 { font-size: 16px; font-weight: 600; color: var(--fg); }
.bss-empty-rich p { color: var(--fg-muted); font-size: 13px; max-width: 320px; line-height: 1.5; }

/* Alerts */
.bss-alert {
  padding: 11px 14px;
  border-radius: var(--r);
  margin-bottom: 14px;
  font-size: 13px;
  border: 1px solid;
  display: flex; gap: 10px; align-items: flex-start;
}
.bss-alert.ok { background: var(--success-100); color: var(--success); border-color: #bbf7d0; }
.bss-alert.warn { background: var(--warn-100); color: var(--warn); border-color: #fde68a; }
.bss-alert.err { background: var(--danger-100); color: var(--danger); border-color: #fecaca; }

/* =========================================================
   TOAST
   ========================================================= */
.bss-toast-stack {
  position: fixed;
  right: 20px; bottom: 20px;
  display: flex; flex-direction: column-reverse; gap: 8px;
  z-index: 200;
  pointer-events: none;
}
.bss-toast {
  background: var(--side);
  color: white;
  padding: 12px 16px;
  border-radius: var(--r);
  font-size: 13px;
  font-weight: 500;
  max-width: 380px;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transform: translateY(8px);
  transition: all var(--t-base) var(--ease-out);
  pointer-events: auto;
  display: flex; gap: 10px; align-items: center;
  border-left: 3px solid var(--primary);
}
.bss-toast.show { opacity: 1; transform: translateY(0); }
.bss-toast-success { border-left-color: var(--success); }
.bss-toast-error { border-left-color: var(--danger); background: var(--danger); }
.bss-toast-warn { border-left-color: var(--accent); }

/* =========================================================
   SALE SUCCESS overlay
   ========================================================= */
.bss-sale-success {
  position: fixed; inset: 0;
  background: var(--overlay);
  backdrop-filter: blur(4px);
  display: grid; place-items: center;
  z-index: 100; padding: 20px;
  animation: bss-modal-bg var(--t-base) ease-out;
}
.bss-sale-success-card {
  background: var(--surface);
  border-radius: var(--r-lg);
  width: 100%; max-width: 440px;
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  animation: bss-modal-in var(--t-slow) var(--ease-out);
}
.bss-sale-success-card .head {
  padding: 26px 24px 20px;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
  text-align: center;
  position: relative;
}
.bss-sale-success-card .head .check {
  width: 52px; height: 52px;
  background: var(--success);
  border-radius: 50%;
  display: grid; place-items: center;
  margin: 0 auto 12px;
  color: white;
  animation: bss-pop .35s var(--ease-out);
  box-shadow: 0 4px 12px -4px rgba(21, 128, 61, .5);
}
@keyframes bss-pop { from { transform: scale(0); } to { transform: scale(1); } }
.bss-sale-success-card .head h2 { font-size: 19px; }
.bss-sale-success-card .head .receipt-no {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-muted);
  margin-top: 6px;
  letter-spacing: .04em;
}
.bss-sale-success-card .body { padding: 20px 24px; }
.bss-sale-success-card .body .row {
  display: flex; justify-content: space-between;
  padding: 5px 0;
  font-size: 13px;
  color: var(--fg-muted);
  font-variant-numeric: tabular-nums;
}
.bss-sale-success-card .body .row strong { color: var(--fg); font-weight: 600; }
.bss-sale-success-card .body .row.total {
  border-top: 1px solid var(--border);
  margin-top: 8px;
  padding-top: 12px;
  font-size: 14px;
  font-weight: 700;
  color: var(--fg);
}
.bss-sale-success-card .body .row.total strong {
  font-size: 22px;
  color: var(--accent);
  letter-spacing: -0.02em;
}
.bss-sale-success-card .actions {
  padding: 14px 24px 18px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 8px;
  border-top: 1px solid var(--border);
}

/* =========================================================
   PRINT
   ========================================================= */
@media print {
  body { background: white; }
  .bss-sidebar, .bss-topbar, .bss-toast-stack, .bss-sale-success { display: none !important; }
  .bss-main { margin-left: 0; }
}

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width: 1180px) {
  .bss-pos { grid-template-columns: minmax(0, 1fr) 380px; }
  .bss-grid-2 { grid-template-columns: 1fr; }
  .bss-ai-review { grid-template-columns: 1fr; }
  .bss-ai-review .preview { position: relative; top: 0; }
  .bss-ai-review .preview img, .bss-ai-review .preview embed, .bss-ai-review .preview iframe { height: 320px; }
}
@media (max-width: 880px) {
  .bss-burger { display: inline-flex; }
  .bss-sidebar { transform: translateX(-100%); }
  body.sidebar-open .bss-sidebar { transform: translateX(0); box-shadow: var(--shadow-lg); }
  body.sidebar-open::after {
    content: ''; position: fixed; inset: 0;
    background: rgba(15,23,42,.5); z-index: 49;
    animation: bss-modal-bg var(--t-base);
  }
  .bss-main { margin-left: 0; }
  .bss-pos { grid-template-columns: 1fr; height: auto; }
  .bss-pos-right {
    position: sticky; bottom: 0;
    max-height: 75vh;
    box-shadow: 0 -8px 16px -4px rgba(15,23,42,.08);
  }
  .bss-form-grid { grid-template-columns: 1fr; }
  .bss-suggestion { grid-template-columns: 1fr 70px; }
  .bss-suggestion .bar, .bss-suggestion .stk { display: none; }
  .bss-scanned-card {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .bss-scanned-card .price {
    text-align: left;
    padding-left: 0;
    border-left: 0;
    padding-top: 12px;
    border-top: 1px solid var(--border);
  }
  .bss-content { padding: 16px; }
  .bss-pay-methods { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
  .bss-content { padding: 14px; }
  .bss-card { padding: 14px; }
  .bss-page-head h1 { font-size: 20px; }
  .bss-cart-item { grid-template-columns: 1fr auto auto; gap: 8px; }
  .bss-cart-item .ci-remove { grid-column: -2 / -1; }
  .bss-stat strong { font-size: 22px; }
  h1 { font-size: 20px; }
  .bss-topbar { padding: 0 16px; gap: 10px; }
  .bss-time { display: none; }
  .bss-table th, .bss-table td { padding: 8px 10px; font-size: 12px; }
}