:root{
  --brand:#0E7C86; --brand-dark:#0A5A62; --amber:#D9862A;
  --success:#2E8B57; --danger:#C1473A;
  --ink:#16262A; --ink-soft:#4B6469; --ink-faint:#7E9599;
  --paper:#F3F7F6; --surface:#FFFFFF; --surface-2:#EAF2F1;
  --line:rgba(22,38,42,0.12); --line-strong:rgba(22,38,42,0.22);
  --shadow:0 1px 2px rgba(22,38,42,0.06), 0 14px 30px -18px rgba(22,38,42,0.28);
  --radius-s:8px; --radius-m:14px; --radius-l:22px;
  --font-display:'Fraunces','Iowan Old Style',Georgia,serif;
  --font-body:'Manrope',system-ui,-apple-system,sans-serif;
  --font-mono:'IBM Plex Mono',ui-monospace,monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark){
  :root{
    --ink:#E8F1F1; --ink-soft:#A9C2C3; --ink-faint:#6E898B;
    --paper:#0A1516; --surface:#0F1E20; --surface-2:#132628;
    --line:rgba(232,241,241,0.13); --line-strong:rgba(232,241,241,0.24);
    --shadow:0 1px 2px rgba(0,0,0,0.4), 0 14px 30px -18px rgba(0,0,0,0.6);
    color-scheme: dark;
  }
}
*,*::before,*::after{ box-sizing:border-box; }
html,body{ height:100%; }
body{ margin:0; background:var(--paper); color:var(--ink); font-family:var(--font-body); font-size:15px; line-height:1.5; -webkit-font-smoothing:antialiased; }
h1,h2,h3{ font-family:var(--font-display); font-weight:600; margin:0 0 6px; }
a{ color:var(--brand); }
.num{ font-family:var(--font-mono); font-variant-numeric:tabular-nums; }
button{ font-family:inherit; }

.shell{ display:grid; grid-template-columns:240px minmax(0,1fr); min-height:100vh; }
.sidebar{ background:var(--surface); border-right:1px solid var(--line); display:flex; flex-direction:column; padding:20px 16px; min-width:0; }
.brand{ display:flex; align-items:center; gap:10px; padding:6px 8px 18px; }
.brand-mark{ width:34px; height:34px; border-radius:50%; background:linear-gradient(155deg,var(--brand),var(--brand-dark)); color:#fff; display:flex; align-items:center; justify-content:center; font-weight:700; font-size:13px; flex:none; }
.brand-name{ font-family:var(--font-display); font-size:16px; line-height:1.2; }
.nav{ display:flex; flex-direction:column; gap:2px; flex:1; }
.nav a{ padding:10px 12px; border-radius:var(--radius-s); color:var(--ink-soft); text-decoration:none; font-weight:600; font-size:14px; }
.nav a:hover{ background:var(--surface-2); color:var(--ink); }
.nav a.active{ background:var(--brand); color:#fff; }
.sidebar-foot{ border-top:1px solid var(--line); padding-top:14px; margin-top:14px; display:flex; flex-direction:column; gap:8px; }
.staff-chip{ font-size:13px; font-weight:700; color:var(--ink-soft); padding:0 4px; }

.content{ min-width:0; padding:28px 32px 60px; }
.topbar{ margin-bottom:18px; }
.topbar h1{ font-size:26px; }

.flash{ padding:12px 16px; border-radius:var(--radius-s); margin-bottom:16px; font-weight:600; font-size:14px; }
.flash-ok{ background:rgba(46,139,87,0.12); color:var(--success); }
.flash-error{ background:rgba(193,71,58,0.12); color:var(--danger); }

.btn{ display:inline-flex; align-items:center; gap:8px; padding:10px 18px; border-radius:100px; font-weight:700; font-size:14px; text-decoration:none; border:1px solid transparent; cursor:pointer; white-space:nowrap; background:var(--surface-2); color:var(--ink); }
.btn-brand{ background:var(--brand); color:#fff; }
.btn-brand:hover{ background:var(--brand-dark); }
.btn-amber{ background:var(--amber); color:#fff; }
.btn-danger{ background:var(--danger); color:#fff; }
.btn-ghost{ background:transparent; border-color:var(--line-strong); color:var(--ink); }
.btn-ghost:hover{ background:var(--surface-2); }
.btn-sm{ padding:7px 13px; font-size:12.5px; }
.btn-block{ width:100%; justify-content:center; }
.btn:focus-visible{ outline:2px solid var(--brand); outline-offset:2px; }
.btn[disabled]{ opacity:.5; cursor:not-allowed; }

.toolbar{ display:flex; align-items:center; gap:10px; flex-wrap:wrap; margin-bottom:18px; }
.toolbar .spacer{ flex:1; }

.card{ background:var(--surface); border:1px solid var(--line); border-radius:var(--radius-m); padding:22px 24px; box-shadow:var(--shadow); }
.card + .card{ margin-top:16px; }
.grid{ display:grid; gap:16px; }
.grid-2{ grid-template-columns:1fr 1fr; }
.grid-3{ grid-template-columns:repeat(3,1fr); }
.grid-4{ grid-template-columns:repeat(4,1fr); }
@media (max-width:900px){ .grid-2,.grid-3,.grid-4{ grid-template-columns:1fr; } }

.tile{ background:var(--surface); border:1px solid var(--line); border-radius:var(--radius-m); padding:18px 20px; box-shadow:var(--shadow); }
.tile .k{ font-size:12px; font-weight:700; text-transform:uppercase; letter-spacing:.04em; color:var(--ink-faint); margin-bottom:6px; }
.tile .v{ font-family:var(--font-display); font-size:26px; }

label{ display:block; font-size:13px; font-weight:700; color:var(--ink-soft); margin-bottom:14px; }
label span.req{ color:var(--danger); }
input,select,textarea{ display:block; width:100%; margin-top:6px; padding:10px 12px; border-radius:var(--radius-s); border:1px solid var(--line-strong); background:var(--surface); color:var(--ink); font-family:inherit; font-size:14px; }
input:focus,select:focus,textarea:focus{ outline:2px solid var(--brand); outline-offset:1px; }
textarea{ resize:vertical; min-height:70px; }
.form-row{ display:grid; grid-template-columns:repeat(2,1fr); gap:0 18px; }
.form-actions{ display:flex; gap:10px; margin-top:6px; }
fieldset{ border:1px solid var(--line); border-radius:var(--radius-m); padding:16px 18px; margin:0 0 18px; }
legend{ font-family:var(--font-display); font-size:15px; padding:0 6px; }

table{ width:100%; border-collapse:collapse; font-size:14px; }
th,td{ text-align:left; padding:10px 12px; border-bottom:1px solid var(--line); }
th{ font-size:11.5px; text-transform:uppercase; letter-spacing:.04em; color:var(--ink-faint); font-weight:700; }
tbody tr:hover{ background:var(--surface-2); }
.table-wrap{ overflow-x:auto; }
.right{ text-align:right; }
.center{ text-align:center; }
.muted{ color:var(--ink-faint); }

.pill{ display:inline-flex; align-items:center; padding:4px 11px; border-radius:100px; font-size:12px; font-weight:700; }
.pill-amber{ background:rgba(217,134,42,0.15); color:#9C5F14; }
.pill-success{ background:rgba(46,139,87,0.15); color:var(--success); }
.pill-danger{ background:rgba(193,71,58,0.15); color:var(--danger); }
.pill-muted{ background:var(--surface-2); color:var(--ink-soft); }

.order-rows{ display:flex; flex-direction:column; gap:10px; margin-bottom:14px; }
.order-row{ display:grid; grid-template-columns:2fr 90px 110px 110px 36px; gap:10px; align-items:end; }
.order-row label{ margin-bottom:0; }
@media (max-width:760px){ .order-row{ grid-template-columns:1fr 1fr; } }
.order-total{ font-family:var(--font-display); font-size:22px; text-align:right; padding:14px 0; border-top:1px solid var(--line); }

.login-wrap{ min-height:100vh; display:flex; align-items:center; justify-content:center; padding:20px; }
.login-card{ width:100%; max-width:380px; background:var(--surface); border:1px solid var(--line); border-radius:var(--radius-l); padding:36px 32px; box-shadow:var(--shadow); }
.login-card h1{ font-size:24px; margin-bottom:4px; }
.login-card .sub{ color:var(--ink-faint); font-size:13.5px; margin-bottom:24px; }
.login-note{ font-size:12px; color:var(--ink-faint); margin-top:18px; line-height:1.5; }

.chart-wrap{ overflow-x:auto; }
.stock-low{ color:var(--danger); font-weight:700; }

@media print{
  .sidebar,.toolbar,.no-print{ display:none !important; }
  .shell{ display:block; }
  .content{ padding:0; }
  body{ background:#fff; }
}

@media (max-width:900px){
  .shell{ grid-template-columns:1fr; }
  .sidebar{ position:sticky; top:0; z-index:20; flex-direction:row; align-items:center; padding:10px 14px; overflow-x:auto; }
  .brand{ padding:0 10px 0 0; }
  .nav{ flex-direction:row; }
  .sidebar-foot{ border-top:none; margin-top:0; padding-top:0; flex-direction:row; margin-left:auto; }
  .staff-chip{ display:none; }
  .content{ padding:18px 16px 40px; }
  .form-row{ grid-template-columns:1fr; }
}