:root {
  --ink: #14201b;
  --muted: #637069;
  --line: #d9ded6;
  --panel: #ffffff;
  --surface: #f7f5ef;
  --primary: #0e6b5d;
  --primary-dark: #084d43;
  --accent: #c9912e;
  --soft: #edf4f1;
  --warn-bg: #fbf1dc;
  --warn: #8a5a0b;
  --danger: #9c2f24;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background: var(--surface);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

a { color: inherit; text-decoration: none; }
h1 { font-size: 1.4rem; margin: 0 0 8px; }
h2 { font-size: 1.05rem; margin: 24px 0 8px; }
.card h2, .cart-panel h2 { margin-top: 0; }
.muted { color: var(--muted); }
.small { font-size: 0.85rem; }
.danger { color: var(--danger); }
.warn { background: var(--warn-bg); color: var(--warn); padding: 8px 12px; border-radius: 8px; margin: 8px 0; }
.error { color: var(--danger); margin: 0; }

/* ---------- Top bar ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px 16px;
  padding: calc(10px + env(safe-area-inset-top, 0px)) clamp(12px, 4vw, 40px) 10px;
  border-bottom: 1px solid var(--line);
  background: rgba(247, 245, 239, 0.95);
  backdrop-filter: blur(14px);
  position: sticky;
  top: 0;
  z-index: 10;
}
.brand { display: inline-flex; align-items: center; gap: 10px; }
.brand small { display: block; color: var(--muted); font-size: 0.78rem; }
.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  font-weight: 800;
  font-size: 0.8rem;
}
.brand-mark.big { width: 64px; height: 64px; font-size: 1.1rem; border-radius: 16px; }
.nav { display: flex; flex-wrap: wrap; gap: 4px; align-items: center; }
.nav a, .nav .link { padding: 8px 12px; border-radius: 999px; font-weight: 600; font-size: 0.95rem; }
.nav a.active { background: var(--primary); color: #fff; }
.nav .link { color: var(--muted); }

main { max-width: 1100px; margin: 0 auto; padding: 16px clamp(12px, 3vw, 32px) 48px; }

/* ---------- Building blocks ---------- */
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 16px; }
.card { border: 1px solid var(--line); border-radius: 12px; padding: 14px; background: var(--panel); margin: 12px 0; }
.stack { display: flex; flex-direction: column; gap: 12px; }
.grid2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; }
.title-row { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; flex-wrap: wrap; }

label { display: flex; flex-direction: column; gap: 4px; font-size: 0.85rem; font-weight: 600; color: var(--muted); }
label.inline { flex-direction: row; align-items: center; gap: 6px; }
label.check { flex-direction: row; align-items: center; gap: 8px; color: var(--ink); }
input, select {
  font: inherit;
  color: var(--ink);
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  min-width: 0;
}
input:focus, select:focus { outline: 2px solid var(--primary); outline-offset: 1px; }
input[type="checkbox"] { width: 20px; height: 20px; }
label.inline input { width: 100px; }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 12px 18px;
  border-radius: 10px;
  border: 1px solid transparent;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  min-height: 46px;
}
.button.primary { background: var(--primary); color: #fff; }
.button.primary:hover { background: var(--primary-dark); }
.button.secondary { background: var(--soft); color: var(--primary-dark); border-color: var(--line); }
.button:disabled { opacity: 0.5; cursor: not-allowed; }
.small-btn { min-height: 36px; padding: 6px 12px; font-size: 0.9rem; }
.danger-btn { background: var(--danger) !important; color: #fff !important; }
.link { background: none; border: none; color: var(--primary); font: inherit; font-weight: 600; cursor: pointer; padding: 6px 0; }
.icon {
  width: 36px; height: 36px; border-radius: 50%;
  border: 1px solid var(--line); background: #fff; font-size: 1.05rem; cursor: pointer; flex: none;
}
.chip {
  border: 1px solid var(--line); background: #fff; border-radius: 999px;
  padding: 6px 14px; font: inherit; font-size: 0.88rem; font-weight: 600; cursor: pointer;
}
.chip.on { background: var(--accent); border-color: var(--accent); color: #fff; }
.chip:disabled { opacity: 0.4; }
.badge {
  display: inline-block; padding: 2px 8px; border-radius: 999px;
  background: var(--soft); color: var(--primary-dark); font-size: 0.75rem; font-weight: 700;
}
.badge.warn { background: var(--warn-bg); color: var(--warn); margin: 0; padding: 2px 8px; }
.badge.danger { background: #f6e1de; color: var(--danger); }

/* ---------- Login ---------- */
.login { max-width: 380px; margin: 8vh auto 0; text-align: center; }
.login form { text-align: left; margin-top: 20px; }

/* ---------- Lists ---------- */
.search { width: 100%; font-size: 1.05rem; }
.results { list-style: none; padding: 0; margin: 8px 0 0; }
.results li + li { border-top: 1px solid var(--line); }
.result {
  display: flex; width: 100%; justify-content: space-between; align-items: center; gap: 12px;
  padding: 12px 4px; background: none; border: none; font: inherit; text-align: left; cursor: pointer; color: inherit;
}
.result > span:first-child { display: flex; flex-direction: column; gap: 2px; align-items: flex-start; }
.result:hover { background: var(--soft); }
.result-meta { display: flex; flex-direction: column; align-items: flex-end; gap: 2px; white-space: nowrap; }

/* ---------- Sell ---------- */
.sell { display: grid; gap: 16px; }
@media (min-width: 860px) {
  .sell { grid-template-columns: 1fr 1fr; align-items: start; }
  .cart-panel { position: sticky; top: 90px; }
}
.cart-lines { list-style: none; padding: 0; margin: 0; }
.cart-line { border-bottom: 1px solid var(--line); padding: 12px 0; display: flex; flex-direction: column; gap: 10px; }
.cart-head, .cart-row { display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; }
.cart-row.chips { justify-content: flex-start; }
.cart-row input, .cart-row select { flex: 1 1 100px; }
.qty { display: flex; align-items: center; gap: 10px; font-weight: 700; }
.line-total { margin-left: auto; }
.total-row { display: flex; justify-content: space-between; font-size: 1.3rem; padding: 14px 0 10px; }
#cart-footer .actions .button { flex: 1 1 140px; }

/* ---------- Modal and toast ---------- */
.modal {
  position: fixed; inset: 0; background: rgba(20, 32, 27, 0.55); display: grid; place-items: center;
  padding: 16px; z-index: 30;
}
.modal-card { background: #fff; border-radius: 16px; padding: 20px; max-width: 360px; width: 100%; text-align: center; }
.modal-card .actions { justify-content: center; }
.qr { width: 240px; max-width: 100%; aspect-ratio: 1; }
.toast {
  position: fixed; left: 50%; transform: translateX(-50%);
  top: calc(12px + env(safe-area-inset-top, 0px));
  max-width: min(92vw, 520px); padding: 12px 18px; border-radius: 12px;
  background: var(--ink); color: #fff; font-weight: 600; z-index: 40; box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}
.toast.error { background: var(--danger); }

/* ---------- Stock and item ---------- */
.filters { display: flex; flex-wrap: wrap; gap: 8px; align-items: flex-end; margin: 12px 0 4px; }
.filters .search { flex: 1 1 220px; width: auto; }
.forms { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); align-items: start; margin: 12px 0; }
.forms .card { margin: 0; }
.stock-big { text-align: center; background: var(--soft); border-radius: 12px; padding: 8px 16px; }
.stock-big strong { display: block; font-size: 2rem; }
.stock-big span { font-size: 0.8rem; color: var(--muted); }
.stock-big.danger strong { color: var(--danger); }
details summary { cursor: pointer; }
details form { margin-top: 12px; }

/* ---------- Sales ---------- */
.sales { list-style: none; padding: 0; margin: 0; }
.sale { border-bottom: 1px solid var(--line); padding: 12px 0; display: flex; flex-direction: column; gap: 6px; align-items: flex-start; }
.sale-head { display: flex; justify-content: space-between; width: 100%; gap: 8px; flex-wrap: wrap; }
.sale.cancelled { opacity: 0.6; }

/* ---------- Reports ---------- */
.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px; }
.tile { background: var(--soft); border-radius: 12px; padding: 12px 14px; display: flex; flex-direction: column; gap: 2px; }
.tile span { font-size: 0.8rem; color: var(--muted); font-weight: 600; }
.tile strong { font-size: 1.35rem; font-variant-numeric: tabular-nums; }
.tile small { color: var(--muted); }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
th, td { text-align: left; padding: 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-size: 0.8rem; font-weight: 700; white-space: nowrap; }
td input, td select { padding: 6px 8px; width: 100%; min-width: 90px; }
.num { text-align: right; font-variant-numeric: tabular-nums; }
h3 { font-size: 0.95rem; margin: 18px 0 6px; color: var(--muted); }

/* ---------- Library ---------- */
.tabs { display: flex; flex-wrap: wrap; gap: 6px; margin: 4px 0 12px; }
.tabs a { padding: 6px 14px; border-radius: 999px; border: 1px solid var(--line); font-weight: 600; font-size: 0.9rem; }
.tabs a.on { background: var(--soft); border-color: var(--primary); color: var(--primary-dark); }
.picked {
  display: flex; justify-content: space-between; align-items: center; gap: 8px; flex-wrap: wrap;
  background: var(--soft); border-radius: 10px; padding: 10px 12px;
}
.result:disabled { cursor: not-allowed; opacity: 0.55; }
.result:disabled:hover { background: none; }
tr.muted td { color: var(--muted); }
.qr-poster { text-align: center; max-width: 420px; margin: 16px auto; display: flex; flex-direction: column; align-items: center; gap: 8px; }
.qr-poster h2 { margin: 8px 0 0; font-size: 1.4rem; }
.qr-poster .qr { width: 320px; }

@media print {
  .topbar, .tabs, .no-print, .toast { display: none !important; }
  body { background: #fff; }
  .panel { border: none; }
  .qr-poster { margin-top: 10vh; }
}