/* ==========================================================================
   StockNova — Retail Operations Console
   Design system: "Signal" — charcoal shop-floor surfaces, amber signal accent,
   mint for positive movement. Solid colours only, no decorative gradients.
   Display face: Space Grotesk. UI face: IBM Plex Sans. Figures: IBM Plex Mono.
   --------------------------------------------------------------------------
   1.  Tokens
   2.  Reset & base
   3.  App shell (sidebar, topbar, drawer)
   4.  Typography
   5.  Buttons & controls
   6.  Forms
   7.  Cards, stats, tables
   8.  Badges & status
   9.  POS surfaces
   10. Modal, toast, empty / loading / error states
   11. Print
   12. Responsive
   ========================================================================== */

/* -- 1. Tokens ----------------------------------------------------------- */
:root {
  /* Surfaces — dark is the default operating theme (shop floors are dim) */
  --bg:            #0d1014;
  --surface-1:     #14181f;
  --surface-2:     #1b2029;
  --surface-3:     #232a35;
  --line:          #2a323f;
  --line-soft:     #1e242e;

  /* Ink */
  --ink:           #eef1f6;
  --ink-2:         #a3adbb;
  --ink-3:         #737e8e;

  /* Signal palette */
  --accent:        #f2b02c;   /* amber — the one loud colour */
  --accent-strong: #ffc24d;
  --accent-ink:    #1a1204;   /* text that sits on amber */
  --accent-wash:   rgba(242, 176, 44, .12);
  --accent-line:   rgba(242, 176, 44, .32);

  --mint:          #3ddc9a;
  --mint-wash:     rgba(61, 220, 154, .12);
  --danger:        #ff6f5e;
  --danger-wash:   rgba(255, 111, 94, .13);
  --warn:          #f5a524;
  --warn-wash:     rgba(245, 165, 36, .13);
  --info:          #62b8ff;
  --info-wash:     rgba(98, 184, 255, .12);

  /* Radii — deliberately varied by element weight */
  --r-xs:  3px;
  --r-sm:  6px;
  --r-md:  9px;
  --r-lg:  14px;
  --r-pill: 999px;

  /* Spacing — 4px 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;  --s-12: 48px;

  /* Elevation */
  --shadow-1: 0 1px 2px rgba(0,0,0,.4);
  --shadow-2: 0 8px 24px -12px rgba(0,0,0,.7);
  --shadow-3: 0 24px 60px -20px rgba(0,0,0,.8);

  /* Motion */
  --ease: cubic-bezier(.2, .7, .3, 1);
  --fast: 120ms;
  --med:  200ms;

  --sidebar-w: 244px;
  --topbar-h:  64px;

  color-scheme: dark;
}

[data-theme="light"] {
  --bg:            #f4f2ed;   /* warm paper, never a flat white void */
  --surface-1:     #fffdf9;
  --surface-2:     #f7f4ee;
  --surface-3:     #ece8e0;
  --line:          #ddd7cc;
  --line-soft:     #e7e2d8;

  --ink:           #191c22;
  --ink-2:         #545c69;
  --ink-3:         #7c8593;

  --accent:        #a86a00;   /* darkened so amber text passes AA on paper */
  --accent-strong: #8a5600;
  --accent-ink:    #fffdf9;
  --accent-wash:   rgba(168, 106, 0, .10);
  --accent-line:   rgba(168, 106, 0, .28);

  --mint:          #0b7a4d;
  --mint-wash:     rgba(11, 122, 77, .10);
  --danger:        #c0392b;
  --danger-wash:   rgba(192, 57, 43, .10);
  --warn:          #96660a;
  --warn-wash:     rgba(150, 102, 10, .12);
  --info:          #0b5fa4;
  --info-wash:     rgba(11, 95, 164, .10);

  --shadow-1: 0 1px 2px rgba(30,26,18,.08);
  --shadow-2: 0 8px 24px -14px rgba(30,26,18,.28);
  --shadow-3: 0 24px 60px -24px rgba(30,26,18,.34);

  color-scheme: light;
}

/* -- 2. Reset & base ----------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }

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

body {
  background: var(--bg);
  color: var(--ink);
  font-family: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
  font-size: 14px;
  line-height: 1.55;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }

/* One focus treatment, everywhere. Never removed. */
:focus { outline: none; }
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: var(--r-xs);
}

::selection { background: var(--accent-wash); color: var(--ink); }

.sn-sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap;
}

.sn-skip-link {
  position: absolute; left: var(--s-3); top: -100px; z-index: 200;
  background: var(--accent); color: var(--accent-ink);
  padding: var(--s-2) var(--s-4); border-radius: var(--r-sm); font-weight: 600;
  transition: top var(--fast) var(--ease);
}
.sn-skip-link:focus { top: var(--s-3); }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--surface-3); border-radius: var(--r-pill); border: 3px solid var(--bg); }
::-webkit-scrollbar-thumb:hover { background: var(--line); }

/* -- 3. App shell -------------------------------------------------------- */
.sn-shell { display: grid; grid-template-columns: var(--sidebar-w) minmax(0, 1fr); min-height: 100vh; }

.sn-sidebar {
  background: var(--surface-1);
  border-right: 1px solid var(--line-soft);
  display: flex; flex-direction: column;
  position: sticky; top: 0; height: 100vh;
}

.sn-brand {
  display: flex; align-items: center; gap: var(--s-3);
  padding: var(--s-5) var(--s-5) var(--s-4);
  border-bottom: 1px solid var(--line-soft);
}
.sn-brand__mark {
  width: 34px; height: 34px; flex: none;
  background: var(--accent); color: var(--accent-ink);
  border-radius: var(--r-sm);
  display: grid; place-items: center;
  font-size: 15px;
}
.sn-brand__name {
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  font-weight: 700; font-size: 17px; letter-spacing: -.015em; line-height: 1.1;
}
.sn-brand__name b { font-weight: 700; color: var(--accent); }
.sn-brand__env {
  display: block; font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 10px; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3);
}

.sn-nav { flex: 1 1 auto; overflow-y: auto; padding: var(--s-3) var(--s-3) var(--s-5); }
.sn-nav__group {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 10px; letter-spacing: .12em; text-transform: uppercase;
  color: var(--ink-3); padding: var(--s-5) var(--s-3) var(--s-2);
}
.sn-nav__group:first-child { padding-top: var(--s-2); }

.sn-nav__item {
  display: flex; align-items: center; gap: var(--s-3);
  padding: 9px var(--s-3);
  border-radius: var(--r-sm);
  color: var(--ink-2); font-size: 13.5px; font-weight: 500;
  border-left: 2px solid transparent;
  transition: background var(--fast) var(--ease), color var(--fast) var(--ease);
}
.sn-nav__item i { width: 16px; text-align: center; font-size: 13px; flex: none; }
.sn-nav__item:hover { background: var(--surface-2); color: var(--ink); }
.sn-nav__item:active { background: var(--surface-3); }
.sn-nav__item[aria-current="page"] {
  background: var(--accent-wash);
  color: var(--accent-strong);
  border-left-color: var(--accent);
  font-weight: 600;
}
.sn-nav__count {
  margin-left: auto;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 10.5px; font-weight: 600;
  background: var(--surface-3); color: var(--ink-2);
  padding: 1px 6px; border-radius: var(--r-pill);
}
.sn-nav__count--alert { background: var(--danger-wash); color: var(--danger); }

.sn-user {
  display: flex; align-items: center; gap: var(--s-3);
  padding: var(--s-4) var(--s-5);
  border-top: 1px solid var(--line-soft);
  width: 100%; background: none; border-left: 0; border-right: 0; border-bottom: 0;
  text-align: left; cursor: pointer;
  transition: background var(--fast) var(--ease);
}
.sn-user:hover { background: var(--surface-2); }
.sn-user__name { font-weight: 600; font-size: 13px; }
.sn-user__role {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 10px; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-3);
}
.sn-user__out { color: var(--ink-3); font-size: 13px; }
.sn-user:hover .sn-user__out { color: var(--danger); }

.sn-avatar {
  width: 32px; height: 32px; flex: none; border-radius: var(--r-sm);
  background: var(--surface-3); color: var(--ink);
  display: grid; place-items: center;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 11px; font-weight: 600; letter-spacing: .02em;
}
.sn-avatar--sm { width: 26px; height: 26px; font-size: 9.5px; border-radius: var(--r-xs); }

.sn-main { min-width: 0; display: flex; flex-direction: column; }

.sn-topbar {
  position: sticky; top: 0; z-index: 30;
  min-height: var(--topbar-h);
  display: flex; align-items: center; gap: var(--s-4);
  padding: var(--s-3) var(--s-8);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line-soft);
}
.sn-topbar__titles { min-width: 0; flex: 1 1 auto; }
.sn-topbar__actions { display: flex; align-items: center; gap: var(--s-2); flex: none; }

.sn-burger {
  display: none; flex: none;
  width: 36px; height: 36px; border-radius: var(--r-sm);
  background: var(--surface-2); border: 1px solid var(--line-soft);
  color: var(--ink); cursor: pointer;
}
.sn-burger:hover { background: var(--surface-3); }

.sn-scrim {
  position: fixed; inset: 0; z-index: 40;
  background: rgba(0,0,0,.55); backdrop-filter: blur(2px);
  opacity: 0; pointer-events: none;
  transition: opacity var(--med) var(--ease);
}
.sn-scrim.is-open { opacity: 1; pointer-events: auto; }

.sn-content { padding: var(--s-6) var(--s-8) var(--s-12); flex: 1 1 auto; }

/* -- 4. Typography ------------------------------------------------------- */
.sn-h1 {
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  font-size: 22px; font-weight: 700; letter-spacing: -.02em; line-height: 1.2;
}
.sn-h2 {
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  font-size: 15px; font-weight: 700; letter-spacing: -.01em;
}
.sn-h3 { font-size: 13px; font-weight: 600; }
.sn-sub { color: var(--ink-2); font-size: 12.5px; margin-top: 1px; }
.sn-eyebrow {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 10px; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-3);
}
.sn-mono {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-variant-numeric: tabular-nums;
  letter-spacing: -.01em;
}
.sn-num { font-variant-numeric: tabular-nums; }
.sn-muted { color: var(--ink-2); }
.sn-faint { color: var(--ink-3); }
.sn-up { color: var(--mint); }
.sn-down { color: var(--danger); }

.sn-section-head {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: var(--s-4); margin: var(--s-8) 0 var(--s-4);
}
.sn-section-head:first-child { margin-top: 0; }

/* -- 5. Buttons ---------------------------------------------------------- */
.sn-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--s-2);
  min-height: 36px; padding: 0 var(--s-4);
  border-radius: var(--r-sm); border: 1px solid transparent;
  font-size: 13px; font-weight: 600; letter-spacing: -.005em;
  cursor: pointer; white-space: nowrap;
  transition: background var(--fast) var(--ease), border-color var(--fast) var(--ease),
              color var(--fast) var(--ease), transform var(--fast) var(--ease);
}
.sn-btn i { font-size: 12px; }
.sn-btn:active { transform: translateY(1px); }
.sn-btn:disabled, .sn-btn[aria-disabled="true"] {
  opacity: .45; cursor: not-allowed; transform: none;
}

.sn-btn--primary { background: var(--accent); color: var(--accent-ink); }
.sn-btn--primary:hover:not(:disabled) { background: var(--accent-strong); }

.sn-btn--ghost {
  background: var(--surface-2); color: var(--ink-2); border-color: var(--line-soft);
}
.sn-btn--ghost:hover:not(:disabled) { background: var(--surface-3); color: var(--ink); border-color: var(--line); }

.sn-btn--quiet { background: transparent; color: var(--ink-2); }
.sn-btn--quiet:hover:not(:disabled) { background: var(--surface-2); color: var(--ink); }

.sn-btn--danger { background: var(--danger-wash); color: var(--danger); border-color: transparent; }
.sn-btn--danger:hover:not(:disabled) { background: var(--danger); color: #fff; }

.sn-btn--sm { min-height: 28px; padding: 0 10px; font-size: 12px; border-radius: var(--r-xs); }
.sn-btn--icon { width: 36px; padding: 0; }
.sn-btn--icon.sn-btn--sm { width: 28px; }
.sn-btn--block { width: 100%; }
.sn-btn--lg { min-height: 46px; padding: 0 var(--s-6); font-size: 14.5px; }

.sn-btn.is-busy { pointer-events: none; opacity: .7; }
.sn-btn.is-busy i { animation: sn-spin .7s linear infinite; }
@keyframes sn-spin { to { transform: rotate(360deg); } }

/* Segmented control */
.sn-seg { display: inline-flex; background: var(--surface-2); border: 1px solid var(--line-soft); border-radius: var(--r-sm); padding: 2px; gap: 2px; }
.sn-seg__btn {
  border: 0; background: transparent; color: var(--ink-2);
  padding: 5px 11px; border-radius: var(--r-xs);
  font-size: 12px; font-weight: 600; cursor: pointer;
  transition: background var(--fast) var(--ease), color var(--fast) var(--ease);
}
.sn-seg__btn:hover { color: var(--ink); }
.sn-seg__btn[aria-pressed="true"] { background: var(--surface-3); color: var(--ink); }

/* Filter chips */
.sn-chips { display: flex; gap: var(--s-2); flex-wrap: wrap; }
.sn-chip {
  display: inline-flex; align-items: center; gap: 7px;
  border: 1px solid var(--line-soft); background: var(--surface-2); color: var(--ink-2);
  padding: 5px 12px; border-radius: var(--r-pill);
  font-size: 12px; font-weight: 500; cursor: pointer;
  transition: all var(--fast) var(--ease);
}
.sn-chip i { font-size: 11px; opacity: .75; }
.sn-chip:hover { color: var(--ink); border-color: var(--line); }
.sn-chip[aria-pressed="true"] {
  background: var(--accent-wash); border-color: var(--accent-line); color: var(--accent-strong); font-weight: 600;
}

/* -- 6. Forms ------------------------------------------------------------ */
.sn-field { margin-bottom: var(--s-4); }
.sn-label { display: block; font-size: 12px; font-weight: 600; color: var(--ink-2); margin-bottom: var(--s-2); }
.sn-hint { font-size: 11.5px; color: var(--ink-3); margin-top: var(--s-2); }
.sn-error { font-size: 12px; color: var(--danger); margin-top: var(--s-2); display: flex; align-items: center; gap: 6px; }

.sn-input, .sn-select, .sn-textarea {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  padding: 9px 12px;
  font-size: 13.5px;
  transition: border-color var(--fast) var(--ease), box-shadow var(--fast) var(--ease);
}
.sn-input::placeholder, .sn-textarea::placeholder { color: var(--ink-3); }
.sn-input:hover, .sn-select:hover, .sn-textarea:hover { border-color: var(--ink-3); }
.sn-input:focus, .sn-select:focus, .sn-textarea:focus {
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-wash);
}
.sn-input:disabled, .sn-select:disabled, .sn-textarea:disabled {
  background: var(--surface-2); color: var(--ink-3); cursor: not-allowed;
}
.sn-input[aria-invalid="true"] { border-color: var(--danger); }
.sn-textarea { min-height: 96px; resize: vertical; }
.sn-select { appearance: none; padding-right: 30px;
  background-image: linear-gradient(45deg, transparent 50%, currentColor 50%), linear-gradient(135deg, currentColor 50%, transparent 50%);
  background-position: calc(100% - 15px) 16px, calc(100% - 11px) 16px;
  background-size: 4px 4px, 4px 4px; background-repeat: no-repeat; }

.sn-search {
  display: flex; align-items: center; gap: var(--s-2);
  background: var(--surface-2); border: 1px solid var(--line-soft);
  border-radius: var(--r-sm); padding: 0 var(--s-3); height: 36px; width: 260px;
  transition: border-color var(--fast) var(--ease), box-shadow var(--fast) var(--ease);
}
.sn-search:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-wash); }
.sn-search i { color: var(--ink-3); font-size: 12px; flex: none; }
.sn-search input { flex: 1 1 auto; min-width: 0; background: none; border: 0; font-size: 13px; }
.sn-search input:focus { outline: none; }

/* Switch */
.sn-switch { display: inline-flex; align-items: center; gap: var(--s-3); cursor: pointer; }
.sn-switch input { position: absolute; opacity: 0; width: 0; height: 0; }
.sn-switch__track {
  width: 38px; height: 22px; border-radius: var(--r-pill);
  background: var(--surface-3); border: 1px solid var(--line);
  position: relative; flex: none; transition: background var(--med) var(--ease);
}
.sn-switch__track::after {
  content: ""; position: absolute; top: 2px; left: 2px;
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--ink-2); transition: transform var(--med) var(--ease), background var(--med) var(--ease);
}
.sn-switch input:checked + .sn-switch__track { background: var(--accent); border-color: var(--accent); }
.sn-switch input:checked + .sn-switch__track::after { transform: translateX(16px); background: var(--accent-ink); }
.sn-switch input:focus-visible + .sn-switch__track { outline: 2px solid var(--accent); outline-offset: 2px; }

/* -- 7. Cards, stats, tables -------------------------------------------- */
.sn-card {
  background: var(--surface-1);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-lg);
  overflow: hidden;
}
.sn-card__head {
  display: flex; align-items: center; justify-content: space-between; gap: var(--s-4);
  padding: var(--s-4) var(--s-5);
  border-bottom: 1px solid var(--line-soft);
}
.sn-card__body { padding: var(--s-5); }
.sn-card__body--flush { padding: 0; }
.sn-card__foot {
  padding: var(--s-3) var(--s-5);
  border-top: 1px solid var(--line-soft);
  background: var(--surface-2);
  font-size: 12px; color: var(--ink-2);
  display: flex; align-items: center; justify-content: space-between; gap: var(--s-3);
}

.sn-grid { display: grid; gap: var(--s-4); }
.sn-grid--stats { grid-template-columns: repeat(auto-fit, minmax(215px, 1fr)); }
.sn-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.sn-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.sn-grid--main { grid-template-columns: minmax(0, 1.9fr) minmax(0, 1fr); align-items: start; }
.sn-stack { display: grid; gap: var(--s-4); }
.sn-stack--lg { gap: var(--s-6); }

/* Stat tile — the loudest number on the page, so it gets the display face */
.sn-stat {
  background: var(--surface-1);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  padding: var(--s-4) var(--s-5) var(--s-5);
  position: relative;
}
.sn-stat::before {
  content: ""; position: absolute; left: 0; top: var(--s-5); bottom: var(--s-5);
  width: 2px; border-radius: 0 2px 2px 0; background: var(--line);
}
.sn-stat--accent::before { background: var(--accent); }
.sn-stat--mint::before   { background: var(--mint); }
.sn-stat--danger::before { background: var(--danger); }
.sn-stat__label {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 10px; letter-spacing: .11em; text-transform: uppercase;
  color: var(--ink-3); margin-bottom: var(--s-2);
}
.sn-stat__value {
  font-family: "Space Grotesk", sans-serif;
  font-size: 27px; font-weight: 700; line-height: 1.1; letter-spacing: -.025em;
  font-variant-numeric: tabular-nums;
}
.sn-stat__delta { font-size: 12px; margin-top: var(--s-2); display: flex; align-items: center; gap: 5px; }

/* Table */
.sn-table-wrap { width: 100%; overflow-x: auto; }
.sn-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.sn-table th {
  text-align: left; white-space: nowrap;
  padding: 10px var(--s-5);
  background: var(--surface-2);
  border-bottom: 1px solid var(--line-soft);
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 10px; letter-spacing: .1em; text-transform: uppercase;
  color: var(--ink-3); font-weight: 600;
  position: sticky; top: 0; z-index: 1;
}
.sn-table th.sn-num, .sn-table td.sn-num { text-align: right; }
.sn-table td { padding: 11px var(--s-5); border-bottom: 1px solid var(--line-soft); vertical-align: middle; }
.sn-table tbody tr { transition: background var(--fast) var(--ease); }
.sn-table tbody tr:hover td { background: var(--surface-2); }
.sn-table tbody tr:last-child td { border-bottom: 0; }
.sn-table__sort { background: none; border: 0; cursor: pointer; color: inherit; font: inherit; letter-spacing: inherit; text-transform: inherit; display: inline-flex; align-items: center; gap: 5px; }
.sn-table__sort:hover { color: var(--ink); }
.sn-table__sort i { opacity: .35; font-size: 9px; }
.sn-table__sort[aria-sort]:not([aria-sort="none"]) { color: var(--accent-strong); }
.sn-table__sort[aria-sort]:not([aria-sort="none"]) i { opacity: 1; }

.sn-cellstack { display: flex; align-items: center; gap: var(--s-3); min-width: 0; }
.sn-thumb {
  width: 32px; height: 32px; flex: none; border-radius: var(--r-sm);
  background: var(--surface-3); color: var(--ink-2);
  display: grid; place-items: center; font-size: 13px;
}
.sn-cellstack__t { font-weight: 600; }
.sn-cellstack__s { font-size: 11.5px; color: var(--ink-3); }

/* Meter — stock level */
.sn-meter { height: 4px; border-radius: var(--r-pill); background: var(--surface-3); overflow: hidden; min-width: 56px; }
.sn-meter__fill { height: 100%; border-radius: var(--r-pill); background: var(--mint); transition: width var(--med) var(--ease); }
.sn-meter__fill--warn { background: var(--warn); }
.sn-meter__fill--danger { background: var(--danger); }

/* Sparkline row */
.sn-rank {
  display: flex; align-items: center; gap: var(--s-3);
  padding: 10px 0; border-bottom: 1px solid var(--line-soft);
}
.sn-rank:last-child { border-bottom: 0; }
.sn-rank__n {
  width: 22px; height: 22px; flex: none; border-radius: var(--r-xs);
  background: var(--surface-3); color: var(--ink-2);
  display: grid; place-items: center;
  font-family: "IBM Plex Mono", ui-monospace, monospace; font-size: 10px; font-weight: 600;
}
.sn-rank:first-child .sn-rank__n { background: var(--accent-wash); color: var(--accent-strong); }
.sn-rank__body { flex: 1 1 auto; min-width: 0; }

/* -- 8. Badges ----------------------------------------------------------- */
.sn-badge {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 2px 9px; border-radius: var(--r-pill);
  font-size: 11px; font-weight: 600; letter-spacing: .01em; white-space: nowrap;
  background: var(--surface-3); color: var(--ink-2);
}
.sn-badge--mint   { background: var(--mint-wash);   color: var(--mint); }
.sn-badge--warn   { background: var(--warn-wash);   color: var(--warn); }
.sn-badge--danger { background: var(--danger-wash); color: var(--danger); }
.sn-badge--info   { background: var(--info-wash);   color: var(--info); }
.sn-badge--accent { background: var(--accent-wash); color: var(--accent-strong); }
.sn-badge__dot { width: 5px; height: 5px; border-radius: 50%; background: currentColor; flex: none; }

.sn-live { display: inline-flex; align-items: center; gap: 6px; font-size: 11px; color: var(--ink-3); }
.sn-live__dot { width: 6px; height: 6px; border-radius: 50%; background: var(--mint); animation: sn-pulse 2.4s var(--ease) infinite; }
@keyframes sn-pulse { 0%, 100% { opacity: 1; } 50% { opacity: .25; } }

/* -- 9. POS -------------------------------------------------------------- */
.sn-pos {
  display: grid; grid-template-columns: minmax(0, 1fr) 368px;
  gap: var(--s-5); align-items: stretch;
  height: calc(100vh - var(--topbar-h) - var(--s-6) - var(--s-12));
  min-height: 480px;
}
.sn-pos__panel { display: flex; flex-direction: column; min-height: 0; }
.sn-pos__scroll { overflow-y: auto; flex: 1 1 auto; padding: var(--s-4) var(--s-5); }

.sn-prodgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(148px, 1fr)); gap: var(--s-3); }
.sn-prod {
  text-align: left; cursor: pointer;
  background: var(--surface-2); border: 1px solid var(--line-soft);
  border-radius: var(--r-md); padding: var(--s-3);
  transition: border-color var(--fast) var(--ease), transform var(--fast) var(--ease), background var(--fast) var(--ease);
}
.sn-prod:hover:not(:disabled) { border-color: var(--accent-line); background: var(--surface-3); transform: translateY(-2px); }
.sn-prod:active:not(:disabled) { transform: translateY(0); }
.sn-prod:disabled { opacity: .4; cursor: not-allowed; }
.sn-prod__icon {
  height: 56px; border-radius: var(--r-sm); background: var(--surface-3);
  display: grid; place-items: center; font-size: 20px; color: var(--ink-2); margin-bottom: var(--s-3);
}
.sn-prod__name { display: block; font-size: 12.5px; font-weight: 600; line-height: 1.3; margin-bottom: 3px; }
.sn-prod__price { display: block; font-family: "IBM Plex Mono", monospace; font-size: 13px; font-weight: 600; color: var(--accent-strong); font-variant-numeric: tabular-nums; }
.sn-prod__stock { display: block; font-size: 10.5px; color: var(--ink-3); margin-top: 2px; }

.sn-cart { display: flex; flex-direction: column; min-height: 0; }
.sn-cart__list { flex: 1 1 auto; overflow-y: auto; padding: var(--s-2) var(--s-5); }
.sn-cart__row { display: flex; align-items: center; gap: var(--s-3); padding: var(--s-3) 0; border-bottom: 1px solid var(--line-soft); }
.sn-cart__row:last-child { border-bottom: 0; }
.sn-cart__info { flex: 1 1 auto; min-width: 0; }
.sn-cart__name { font-size: 12.5px; font-weight: 600; }
.sn-cart__meta { font-family: "IBM Plex Mono", monospace; font-size: 11px; color: var(--ink-3); font-variant-numeric: tabular-nums; }

.sn-qty { display: flex; align-items: center; gap: 2px; background: var(--surface-2); border: 1px solid var(--line-soft); border-radius: var(--r-sm); padding: 2px; }
.sn-qty__btn { width: 22px; height: 22px; border: 0; border-radius: var(--r-xs); background: transparent; color: var(--ink-2); cursor: pointer; font-size: 10px; }
.sn-qty__btn:hover { background: var(--surface-3); color: var(--ink); }
.sn-qty__val { min-width: 24px; text-align: center; font-family: "IBM Plex Mono", monospace; font-size: 12px; font-weight: 600; font-variant-numeric: tabular-nums; }

.sn-tally { padding: var(--s-4) var(--s-5); border-top: 1px solid var(--line-soft); background: var(--surface-2); }
.sn-tally__row { display: flex; justify-content: space-between; align-items: baseline; font-size: 12.5px; color: var(--ink-2); margin-bottom: var(--s-2); }
.sn-tally__row--total {
  margin: var(--s-3) 0 var(--s-4); padding-top: var(--s-3);
  border-top: 1px dashed var(--line); color: var(--ink);
}
.sn-tally__total {
  font-family: "Space Grotesk", sans-serif; font-size: 26px; font-weight: 700;
  letter-spacing: -.03em; color: var(--accent); font-variant-numeric: tabular-nums;
}

/* -- 10. Modal, toast, states ------------------------------------------- */
.sn-modal {
  position: fixed; inset: 0; z-index: 90;
  display: none; align-items: center; justify-content: center; padding: var(--s-5);
  background: rgba(3, 5, 8, .66); backdrop-filter: blur(3px);
}
.sn-modal.is-open { display: flex; animation: sn-fade var(--med) var(--ease); }
@keyframes sn-fade { from { opacity: 0; } to { opacity: 1; } }
.sn-modal__box {
  background: var(--surface-1); border: 1px solid var(--line);
  border-radius: var(--r-lg); box-shadow: var(--shadow-3);
  width: 100%; max-width: 470px; max-height: 88vh; overflow: auto;
  animation: sn-rise var(--med) var(--ease);
}
@keyframes sn-rise { from { transform: translateY(12px) scale(.985); opacity: 0; } to { transform: none; opacity: 1; } }
.sn-modal__head { padding: var(--s-5) var(--s-5) var(--s-3); display: flex; align-items: flex-start; justify-content: space-between; gap: var(--s-4); }
.sn-modal__body { padding: 0 var(--s-5) var(--s-5); }
.sn-modal__foot { padding: var(--s-4) var(--s-5); border-top: 1px solid var(--line-soft); display: flex; gap: var(--s-2); justify-content: flex-end; background: var(--surface-2); }

.sn-toasts { position: fixed; right: var(--s-5); bottom: var(--s-5); z-index: 120; display: grid; gap: var(--s-2); width: min(340px, calc(100vw - 40px)); }
.sn-toast {
  display: flex; align-items: flex-start; gap: var(--s-3);
  background: var(--surface-2); border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: var(--r-sm); padding: var(--s-3) var(--s-4);
  box-shadow: var(--shadow-2); font-size: 13px;
  animation: sn-slide var(--med) var(--ease);
}
@keyframes sn-slide { from { transform: translateX(16px); opacity: 0; } to { transform: none; opacity: 1; } }
.sn-toast--ok   { border-left-color: var(--mint); }
.sn-toast--warn { border-left-color: var(--warn); }
.sn-toast--err  { border-left-color: var(--danger); }
.sn-toast i { margin-top: 2px; flex: none; }

/* Data states */
.sn-empty, .sn-errorstate { text-align: center; padding: var(--s-12) var(--s-6); }
.sn-empty__icon, .sn-errorstate__icon {
  width: 46px; height: 46px; margin: 0 auto var(--s-4);
  border-radius: var(--r-md); display: grid; place-items: center;
  background: var(--surface-2); color: var(--ink-3); font-size: 18px;
}
.sn-errorstate__icon { background: var(--danger-wash); color: var(--danger); }
.sn-empty__title, .sn-errorstate__title { font-family: "Space Grotesk", sans-serif; font-size: 15px; font-weight: 700; margin-bottom: var(--s-2); }
.sn-empty__text, .sn-errorstate__text { color: var(--ink-2); font-size: 13px; max-width: 44ch; margin: 0 auto var(--s-5); }

.sn-skel { background: var(--surface-2); border-radius: var(--r-xs); position: relative; overflow: hidden; }
.sn-skel::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent, color-mix(in srgb, var(--ink) 7%, transparent), transparent);
  animation: sn-shimmer 1.3s infinite;
}
@keyframes sn-shimmer { to { transform: translateX(100%); } }
.sn-skel--row { height: 40px; margin-bottom: var(--s-2); }
.sn-skel--stat { height: 96px; border-radius: var(--r-md); }

/* Login */
.sn-auth { min-height: 100vh; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
.sn-auth__side {
  background: var(--surface-1); border-right: 1px solid var(--line-soft);
  padding: var(--s-12) var(--s-10); display: flex; flex-direction: column; justify-content: space-between;
}
.sn-auth__form { display: grid; place-items: center; padding: var(--s-8) var(--s-6); }
.sn-auth__box { width: 100%; max-width: 366px; }
.sn-auth__title { font-family: "Space Grotesk", sans-serif; font-size: 26px; font-weight: 700; letter-spacing: -.03em; }
.sn-auth__pitch { font-family: "Space Grotesk", sans-serif; font-size: 30px; font-weight: 700; line-height: 1.2; letter-spacing: -.03em; margin: var(--s-6) 0 var(--s-4); }
.sn-auth__points { display: grid; gap: var(--s-3); margin-top: var(--s-6); }
.sn-auth__point { display: flex; gap: var(--s-3); align-items: flex-start; font-size: 13px; color: var(--ink-2); }
.sn-auth__point i { color: var(--accent); margin-top: 3px; font-size: 11px; }
.sn-demo {
  margin-top: var(--s-5); border: 1px dashed var(--line); border-radius: var(--r-md);
  padding: var(--s-4); background: var(--surface-2);
}
.sn-demo__row {
  display: flex; align-items: center; justify-content: space-between; gap: var(--s-3);
  width: 100%; background: none; border: 0; cursor: pointer;
  padding: 7px var(--s-2); border-radius: var(--r-xs); text-align: left;
  font-family: "IBM Plex Mono", monospace; font-size: 11.5px; color: var(--ink-2);
}
.sn-demo__row:hover { background: var(--surface-3); color: var(--ink); }

/* -- 11. Print (receipts / purchase orders) ------------------------------ */
.sn-print { display: none; }
@media print {
  @page { margin: 12mm; }
  body { background: #fff; color: #000; }
  .sn-sidebar, .sn-topbar, .sn-toasts, .sn-scrim, .sn-noprint { display: none !important; }
  .sn-shell { display: block; }
  .sn-content { padding: 0; }
  .sn-print { display: block; }
  .sn-card { border-color: #ccc; box-shadow: none; break-inside: avoid; }
}

canvas { display: block; width: 100%; }

/* -- 12. Responsive ------------------------------------------------------ */
@media (max-width: 1240px) {
  .sn-grid--main { grid-template-columns: minmax(0, 1fr); }
  .sn-pos { grid-template-columns: minmax(0, 1fr) 320px; }
}

@media (max-width: 1040px) {
  .sn-grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sn-content { padding: var(--s-5) var(--s-6) var(--s-10); }
  .sn-topbar { padding: var(--s-3) var(--s-6); }
}

@media (max-width: 900px) {
  /* The sidebar becomes an off-canvas drawer — navigation is never removed. */
  .sn-shell { grid-template-columns: minmax(0, 1fr); }
  .sn-sidebar {
    position: fixed; z-index: 50; left: 0; top: 0; bottom: 0;
    width: min(280px, 82vw);
    transform: translateX(-102%);
    transition: transform var(--med) var(--ease);
    box-shadow: var(--shadow-3);
  }
  .sn-sidebar.is-open { transform: none; }
  .sn-burger { display: grid; place-items: center; }
  .sn-pos { grid-template-columns: minmax(0, 1fr); height: auto; }
  .sn-pos__panel { max-height: 68vh; }
  .sn-cart { max-height: none; }
  .sn-auth { grid-template-columns: minmax(0, 1fr); }
  .sn-auth__side { display: none; }
}

@media (max-width: 760px) {
  .sn-grid--2, .sn-grid--3 { grid-template-columns: minmax(0, 1fr); }
  .sn-search { width: 190px; }
  .sn-section-head { flex-direction: column; align-items: flex-start; gap: var(--s-2); }
}

@media (max-width: 620px) {
  body { font-size: 13.5px; }
  .sn-content { padding: var(--s-4) var(--s-4) var(--s-10); }
  .sn-topbar { padding: var(--s-3) var(--s-4); gap: var(--s-2); }
  .sn-h1 { font-size: 18px; }
  .sn-sub { display: none; }
  .sn-search { width: 100%; }
  .sn-topbar__actions .sn-btn__label { display: none; }
  .sn-topbar__actions .sn-btn { padding: 0 10px; }
  .sn-table th, .sn-table td { padding: 10px var(--s-4); }
  .sn-stat__value { font-size: 23px; }
  .sn-toasts { right: var(--s-3); left: var(--s-3); bottom: var(--s-3); width: auto; }
}

@media (max-width: 420px) {
  .sn-grid--stats { grid-template-columns: minmax(0, 1fr); }
  .sn-prodgrid { grid-template-columns: repeat(auto-fill, minmax(126px, 1fr)); }
  .sn-modal { padding: var(--s-3); }
}

/* Touch targets stay at least 24x24 CSS px (WCAG 2.2 AA, 2.5.8) */
@media (pointer: coarse) {
  .sn-btn--sm { min-height: 32px; }
  .sn-qty__btn { width: 28px; height: 28px; }
  .sn-nav__item { padding: 11px var(--s-3); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}