:root {
  --bg: #EDEEE9;
  --surface: #F5F6F2;
  --surface-raised: #FFFFFF;
  --ink: #1B1E1C;
  --ink-muted: #5C6660;
  --border: #CBD0C7;
  --accent: #D98A1D;
  --accent-ink: #4A2E05;
  --structural: #4C5A55;
  --success: #3D7A4C;
  --warning: #D98A1D;
  --critical: #B23A2E;
  --shadow: 0 8px 24px rgba(27, 30, 28, 0.12);
  --focus-ring: #1C6E8C;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15181A;
    --surface: #1D2123;
    --surface-raised: #232729;
    --ink: #E7E9E4;
    --ink-muted: #9CA39D;
    --border: #333936;
    --accent: #E6A238;
    --accent-ink: #1B1200;
    --structural: #7C8B85;
    --success: #55A66A;
    --warning: #E6A238;
    --critical: #D96C5E;
    --shadow: 0 8px 28px rgba(0, 0, 0, 0.45);
    --focus-ring: #6FC6E8;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, "Segoe UI", system-ui, sans-serif;
  font-size: 13.5px;
  line-height: 1.45;
}

a { color: inherit; }
button, select, input { font-family: inherit; color: inherit; }

#blazor-error-ui {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--critical);
  color: #fff;
  padding: 10px 16px;
  font-size: 12.5px;
  z-index: 1000;
}
#blazor-error-ui .reload { color: #fff; text-decoration: underline; margin-left: 8px; }
#blazor-error-ui .dismiss { cursor: pointer; float: right; }
#blazor-error-ui.show { display: block; }

.mono, .num { font-family: ui-monospace, "SF Mono", "Cascadia Code", Menlo, monospace; font-variant-numeric: tabular-nums; }

/* ---------- Shell ---------- */

.app-shell { display: grid; grid-template-columns: 216px 1fr; min-height: 100vh; }

.sidebar {
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 20px 14px;
  display: flex;
  flex-direction: column;
  gap: 28px;
  position: sticky;
  top: 0;
  height: 100vh;
}

.wordmark { display: flex; align-items: center; gap: 8px; padding: 0 6px; color: var(--ink); }
.wordmark svg { color: var(--accent); flex-shrink: 0; }
.wordmark-text { font-weight: 700; font-size: 15px; letter-spacing: 0.08em; text-transform: uppercase; }

.nav-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 2px; }

.nav-item {
  display: flex; align-items: center; gap: 9px; padding: 9px 10px; border-radius: 3px;
  border-left: 2px solid transparent; color: var(--ink-muted); font-size: 12px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.06em; text-decoration: none;
}
.nav-item .dot { width: 5px; height: 5px; border-radius: 1px; background: var(--structural); flex-shrink: 0; }
.nav-item:hover { background: var(--surface-raised); color: var(--ink); }
.nav-item.active { color: var(--accent-ink); background: var(--surface-raised); border-left-color: var(--accent); box-shadow: inset 0 0 0 1px var(--border); }
.nav-item.active .dot { background: var(--accent); }

.sidebar-foot { margin-top: auto; font-size: 10.5px; color: var(--ink-muted); padding: 12px 6px 0; border-top: 1px solid var(--border); }
.sidebar-foot form { margin-top: 8px; }
.sidebar-foot button.link-btn {
  background: none; border: none; padding: 0; color: var(--focus-ring); cursor: pointer; font-size: 10.5px; text-decoration: underline;
}

.main { padding: 18px 24px 40px; min-width: 0; display: flex; flex-direction: column; gap: 18px; }

/* ---------- Header ---------- */

.header-bar { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.header-titles h1 { margin: 0 0 3px; font-size: 19px; letter-spacing: -0.01em; }
.header-titles .subtitle { color: var(--ink-muted); font-size: 12.5px; }
.header-controls { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }

.wh-select {
  appearance: none; background: var(--surface-raised); border: 1px solid var(--border); color: var(--ink);
  padding: 7px 30px 7px 10px; font-size: 11px; font-weight: 600; border-radius: 3px; cursor: pointer;
  text-transform: uppercase; letter-spacing: 0.06em;
}

/* ---------- KPI strip ---------- */

.kpi-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.kpi-card { background: var(--surface-raised); border: 1px solid var(--border); border-radius: 4px; padding: 13px 14px; display: flex; flex-direction: column; gap: 6px; }
.kpi-label { font-size: 10.5px; color: var(--ink-muted); font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; }
.kpi-value { font-size: 22px; font-weight: 600; letter-spacing: -0.01em; }
.kpi-value.critical { color: var(--critical); }
.kpi-sub { font-size: 11px; color: var(--ink-muted); }
.kpi-sub .up { color: var(--success); }

/* ---------- Split layout ---------- */

.split { display: grid; grid-template-columns: minmax(0, 1.62fr) minmax(300px, 1fr); gap: 14px; align-items: start; }
.panel { background: var(--surface-raised); border: 1px solid var(--border); border-radius: 4px; overflow: hidden; }
.panel-head { display: flex; align-items: center; justify-content: space-between; padding: 12px 14px; border-bottom: 1px solid var(--border); gap: 10px; flex-wrap: wrap; }
.section-title { font-size: 11.5px; font-weight: 700; color: var(--ink); display: flex; align-items: center; gap: 8px; text-transform: uppercase; letter-spacing: 0.06em; }
.section-title .count { color: var(--ink-muted); font-weight: 600; }
.panel-tools { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.search-input { background: var(--surface); border: 1px solid var(--border); color: var(--ink); padding: 6px 10px; border-radius: 3px; font-size: 12px; width: 190px; }
.search-input::placeholder { color: var(--ink-muted); }

/* ---------- Table ---------- */

.table-scroll { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; min-width: 720px; }
thead th {
  position: sticky; top: 0; background: var(--surface); text-align: left; padding: 8px 12px; font-size: 10px;
  font-weight: 700; color: var(--ink-muted); border-bottom: 1px solid var(--border); cursor: pointer;
  white-space: nowrap; user-select: none; text-transform: uppercase; letter-spacing: 0.06em; border-top: none; border-right: none; border-left: none;
}
thead th:hover { color: var(--ink); }
thead th.num, td.num { text-align: right; }
thead th .arrow { display: inline-block; margin-left: 3px; opacity: 0.4; }
thead th.sorted .arrow { opacity: 1; color: var(--accent); }

tbody tr { cursor: pointer; border-bottom: 1px solid var(--border); }
tbody tr:last-child { border-bottom: none; }
tbody tr:hover { background: color-mix(in srgb, var(--structural) 8%, transparent); }
tbody tr.low-stock { box-shadow: inset 3px 0 0 var(--critical); }
tbody td { padding: 8px 12px; font-size: 12.5px; vertical-align: middle; white-space: nowrap; }
td.desc-cell { white-space: normal; min-width: 180px; }
td.desc-cell .sku { display: block; font-size: 10.5px; color: var(--ink-muted); font-family: ui-monospace, "SF Mono", "Cascadia Code", Menlo, monospace; }

.status-chip { display: inline-flex; align-items: center; gap: 4px; font-size: 9px; font-weight: 700; padding: 3px 7px; border-radius: 2px; white-space: nowrap; text-transform: uppercase; letter-spacing: 0.06em; }
.status-chip.ok { background: color-mix(in srgb, var(--success) 16%, transparent); color: var(--success); }
.status-chip.low { background: color-mix(in srgb, var(--critical) 16%, transparent); color: var(--critical); }

.empty-row td { text-align: center; color: var(--ink-muted); padding: 24px 12px; font-size: 12px; }

/* ---------- Right column / PO cards ---------- */

.right-col { display: flex; flex-direction: column; gap: 14px; }
.po-list { display: flex; flex-direction: column; gap: 8px; padding: 12px; max-height: 460px; overflow-y: auto; }
.po-card { border: 1px solid var(--border); border-radius: 3px; padding: 9px 10px; cursor: pointer; background: var(--surface); display: flex; flex-direction: column; gap: 7px; }
.po-card:hover { border-color: var(--structural); }
.po-card-top { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; }
.po-num { font-size: 12px; font-weight: 700; }
.po-total { font-size: 12px; font-weight: 700; color: var(--ink); }
.po-supplier { font-size: 11.5px; color: var(--ink-muted); }
.pipeline { display: flex; gap: 3px; }
.pipeline.big { gap: 4px; margin-top: 4px; }
.pipeline.big .pipeline-seg { height: 6px; }
.pipeline-seg { flex: 1; height: 4px; border-radius: 1px; background: var(--border); }
.pipeline-seg.done { background: var(--structural); }
.pipeline-seg.current { background: var(--accent); }
.pipeline-caption { display: flex; justify-content: space-between; font-size: 9px; color: var(--ink-muted); font-weight: 700; }
.pipeline-caption .stage-active { color: var(--accent); }

/* ---------- Supplier scorecard ---------- */

.supplier-list { display: flex; flex-direction: column; padding: 4px 14px 12px; }
.supplier-row { display: grid; grid-template-columns: 1fr auto; gap: 4px 10px; padding: 10px 0; border-bottom: 1px solid var(--border); }
.supplier-row:last-child { border-bottom: none; }
.supplier-name { font-size: 12px; font-weight: 600; }
.supplier-defect { font-size: 10.5px; color: var(--ink-muted); }
.supplier-defect.warn { color: var(--warning); }
.supplier-defect.crit { color: var(--critical); }
.gauge-track { grid-column: 1 / -1; height: 6px; background: var(--border); border-radius: 3px; overflow: hidden; position: relative; }
.gauge-fill { height: 100%; border-radius: 3px; }
.gauge-fill.good { background: var(--success); }
.gauge-fill.warn { background: var(--warning); }
.gauge-fill.bad { background: var(--critical); }
.otd-value { font-size: 12px; font-weight: 700; }

/* ---------- Drawer ---------- */

.overlay { position: fixed; inset: 0; background: rgba(10, 12, 11, 0.45); z-index: 40; }
.drawer {
  position: fixed; top: 0; right: 0; height: 100vh; width: min(420px, 92vw); background: var(--surface-raised);
  border-left: 1px solid var(--border); box-shadow: var(--shadow); z-index: 41; display: flex; flex-direction: column;
}
.drawer-head { display: flex; justify-content: space-between; align-items: flex-start; padding: 18px 18px 14px; border-bottom: 1px solid var(--border); gap: 10px; }
.drawer-eyebrow { font-size: 10px; font-weight: 700; color: var(--ink-muted); margin-bottom: 4px; text-transform: uppercase; letter-spacing: 0.06em; }
.drawer-title { font-size: 16px; font-weight: 700; }
.drawer-close { background: var(--surface); border: 1px solid var(--border); width: 28px; height: 28px; border-radius: 3px; cursor: pointer; color: var(--ink); flex-shrink: 0; }
.drawer-close:hover { border-color: var(--structural); }
.drawer-body { padding: 16px 18px 28px; overflow-y: auto; display: flex; flex-direction: column; gap: 18px; }

.field-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 16px; }
.field-label { font-size: 9.5px; color: var(--ink-muted); font-weight: 700; margin-bottom: 3px; text-transform: uppercase; letter-spacing: 0.06em; }
.field-value { font-size: 13px; }
.field-value.mono { font-family: ui-monospace, "SF Mono", "Cascadia Code", Menlo, monospace; font-variant-numeric: tabular-nums; }
.drawer-section-title { font-size: 10.5px; font-weight: 700; color: var(--ink-muted); letter-spacing: 0.06em; text-transform: uppercase; border-bottom: 1px solid var(--border); padding-bottom: 6px; }

.line-items { display: flex; flex-direction: column; border: 1px solid var(--border); border-radius: 3px; overflow: hidden; }
.line-item { display: grid; grid-template-columns: 1fr auto auto; gap: 8px; padding: 8px 10px; border-bottom: 1px solid var(--border); font-size: 12px; align-items: baseline; }
.line-item:last-child { border-bottom: none; }
.line-item .li-sku { display: block; font-size: 10px; color: var(--ink-muted); font-family: ui-monospace, "SF Mono", "Cascadia Code", Menlo, monospace; }
.line-item .li-qty { color: var(--ink-muted); font-family: ui-monospace, "SF Mono", "Cascadia Code", Menlo, monospace; }
.line-item .li-total { font-weight: 700; font-family: ui-monospace, "SF Mono", "Cascadia Code", Menlo, monospace; }
.po-total-row { display: flex; justify-content: space-between; padding: 10px 10px; background: var(--surface); font-size: 12.5px; font-weight: 700; border-top: 1px solid var(--border); }

.contact-card { background: var(--surface); border: 1px solid var(--border); border-radius: 3px; padding: 10px 12px; font-size: 12px; display: flex; flex-direction: column; gap: 3px; }
.contact-name { font-weight: 700; }
.contact-line { color: var(--ink-muted); font-size: 11.5px; }

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex; align-items: center; gap: 6px; border-radius: 3px; border: 1px solid var(--border);
  background: var(--surface-raised); color: var(--ink); padding: 7px 12px; font-size: 11.5px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.05em; cursor: pointer;
}
.btn:hover { border-color: var(--structural); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.btn-primary:hover { filter: brightness(0.95); }
.btn-danger { background: transparent; color: var(--critical); border-color: var(--critical); }
.btn-danger:hover { background: color-mix(in srgb, var(--critical) 12%, transparent); }
.btn-sm { padding: 5px 9px; font-size: 10.5px; }

.action-row { display: flex; gap: 8px; flex-wrap: wrap; }

/* ---------- Forms (create/edit drawers) ---------- */

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 14px; }
.form-field { display: flex; flex-direction: column; gap: 5px; }
.form-field.span-2 { grid-column: 1 / -1; }
.form-field label { font-size: 10px; font-weight: 700; color: var(--ink-muted); text-transform: uppercase; letter-spacing: 0.06em; }
.form-input, .form-select {
  background: var(--surface); border: 1px solid var(--border); color: var(--ink); padding: 8px 10px;
  border-radius: 3px; font-size: 12.5px; width: 100%;
}
.form-input:focus, .form-select:focus { outline: 2px solid var(--focus-ring); outline-offset: 1px; }

.form-error { background: color-mix(in srgb, var(--critical) 12%, transparent); color: var(--critical); border: 1px solid var(--critical); border-radius: 3px; padding: 8px 10px; font-size: 12px; }

.line-items-edit { display: flex; flex-direction: column; gap: 8px; }
.line-edit-row { display: grid; grid-template-columns: 1.3fr 1.6fr 0.6fr 0.8fr auto; gap: 6px; align-items: end; }
.line-edit-row .form-field { gap: 3px; }
.line-total-cell { font-size: 11px; color: var(--ink-muted); font-family: ui-monospace, "SF Mono", "Cascadia Code", Menlo, monospace; padding-bottom: 8px; }
.no-lines-msg { color: var(--ink-muted); font-size: 12px; padding: 8px 0; }

.inline-confirm { display: flex; align-items: center; gap: 8px; background: color-mix(in srgb, var(--critical) 10%, transparent); border: 1px solid var(--critical); border-radius: 3px; padding: 8px 10px; font-size: 12px; }

/* ---------- Stage workflow ---------- */

.stage-actions { display: flex; gap: 8px; margin-top: 10px; }

/* ---------- Low-stock banner ---------- */

.low-stock-banner { background: var(--surface-raised); border: 1px solid var(--critical); border-left: 4px solid var(--critical); border-radius: 4px; overflow: hidden; }
.lsb-head { display: flex; align-items: center; gap: 8px; padding: 10px 14px; }
.lsb-icon { color: var(--critical); font-size: 14px; }
.lsb-title { font-weight: 700; font-size: 12.5px; color: var(--critical); flex: 1; }
.lsb-toggle { background: none; border: 1px solid var(--border); color: var(--ink-muted); border-radius: 3px; padding: 4px 9px; font-size: 10.5px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; cursor: pointer; }
.lsb-toggle:hover { color: var(--ink); border-color: var(--structural); }
.lsb-list { border-top: 1px solid var(--border); max-height: 220px; overflow-y: auto; }
.lsb-item { display: grid; grid-template-columns: 130px 1fr 170px auto; gap: 10px; padding: 7px 14px; font-size: 11.5px; border-bottom: 1px solid var(--border); align-items: center; }
.lsb-item:last-child { border-bottom: none; }
.lsb-sku { color: var(--ink); font-weight: 600; }
.lsb-desc { color: var(--ink-muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.lsb-wh { color: var(--ink-muted); font-size: 11px; }
.lsb-qty { color: var(--critical); font-weight: 700; }

@media (max-width: 720px) {
  .lsb-item { grid-template-columns: 1fr; gap: 2px; }
  .form-grid { grid-template-columns: 1fr; }
  .line-edit-row { grid-template-columns: 1fr; }
}

/* ---------- Login page ---------- */

.login-shell { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 24px; background: var(--bg); }
.login-card { width: 100%; max-width: 360px; background: var(--surface-raised); border: 1px solid var(--border); border-radius: 6px; padding: 28px 26px; box-shadow: var(--shadow); }
.login-brand { display: flex; align-items: center; gap: 8px; color: var(--accent); font-weight: 700; font-size: 16px; letter-spacing: 0.06em; text-transform: uppercase; margin-bottom: 4px; }
.login-brand span { color: var(--ink); }
.login-subtitle { color: var(--ink-muted); font-size: 12px; margin: 0 0 20px; }
.login-field { display: flex; flex-direction: column; gap: 5px; margin-bottom: 14px; }
.login-field label { font-size: 10.5px; font-weight: 700; color: var(--ink-muted); text-transform: uppercase; letter-spacing: 0.06em; }
.login-input { background: var(--surface); border: 1px solid var(--border); color: var(--ink); padding: 9px 10px; border-radius: 3px; font-size: 13px; }
.login-remember label { display: flex; align-items: center; gap: 6px; text-transform: none; font-weight: 500; font-size: 12px; }
.login-btn { width: 100%; background: var(--accent); color: var(--accent-ink); border: none; padding: 10px; border-radius: 3px; font-weight: 700; font-size: 12.5px; text-transform: uppercase; letter-spacing: 0.06em; cursor: pointer; margin-top: 6px; }
.login-btn:hover { filter: brightness(0.95); }
.login-demo-hint { margin-top: 16px; font-size: 11px; color: var(--ink-muted); text-align: center; }
.login-demo-hint code { font-family: ui-monospace, "SF Mono", "Cascadia Code", Menlo, monospace; }
.text-danger { color: var(--critical); font-size: 12px; }

/* ---------- Responsive ---------- */

@media (max-width: 980px) {
  .app-shell { grid-template-columns: 176px 1fr; }
  .split { grid-template-columns: 1fr; }
  .kpi-strip { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  .app-shell { grid-template-columns: 1fr; }
  .sidebar { position: relative; height: auto; flex-direction: row; align-items: center; flex-wrap: wrap; gap: 12px; }
  .nav-list { flex-direction: row; flex-wrap: wrap; }
  .sidebar-foot { display: none; }
  .kpi-strip { grid-template-columns: 1fr 1fr; }
  .search-input { width: 140px; }
}