:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --border: #e3e6eb;
  --text: #1c2330;
  --muted: #667085;
  --accent: #2f6fdb;
  --ok-bg: #e7f6ec;  --ok-fg: #1d7a3e;
  --low-bg: #fff4dc; --low-fg: #9a6200;
  --out-bg: #fde8e8; --out-fg: #b42318;
  --chip-bg: #f1f3f6;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12151b;
    --surface: #1b2029;
    --border: #2b323e;
    --text: #e6e9ef;
    --muted: #98a2b3;
    --accent: #6c9cf0;
    --ok-bg: #173324;  --ok-fg: #7ad39a;
    --low-bg: #3a2c10; --low-fg: #f2c25b;
    --out-bg: #3d1a1a; --out-fg: #f49b93;
    --chip-bg: #252b36;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

/* Barra superior */
.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 12px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.brand { font-weight: 700; letter-spacing: .2px; }
.topbar nav { display: flex; align-items: center; gap: 16px; }
.topbar nav a { color: var(--muted); text-decoration: none; font-weight: 500; }
.topbar nav a.active { color: var(--text); }
.link-button {
  background: none; border: 0; padding: 0; cursor: pointer;
  color: var(--muted); font: inherit;
}

main { max-width: 1100px; margin: 0 auto; padding: 20px 16px 40px; }
h1 { font-size: 22px; margin: 0 0 4px; }
.subtitle { color: var(--muted); margin: 0 0 16px; }

/* Resumen */
.summary { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.pill {
  padding: 6px 12px; border-radius: 999px; font-size: 14px; font-weight: 600;
  background: var(--chip-bg); color: var(--text);
}
.pill.out { background: var(--out-bg); color: var(--out-fg); }
.pill.low { background: var(--low-bg); color: var(--low-fg); }

/* Filtros */
.filters { display: flex; flex-wrap: wrap; gap: 10px 12px; align-items: center; margin-bottom: 12px; }
.filters input[type=search] {
  flex: 1 1 240px;
  padding: 10px 12px;
  border: 1px solid var(--border); border-radius: 8px;
  background: var(--surface); color: var(--text); font: inherit;
}
.filters label { color: var(--muted); display: flex; gap: 6px; align-items: center; }
.button {
  display: inline-block;
  padding: 10px 18px; border: 0; border-radius: 8px;
  background: var(--accent); color: #fff;
  font: inherit; font-weight: 600; text-decoration: none; cursor: pointer;
}
.button.secondary { background: var(--chip-bg); color: var(--text); }
.result-count { color: var(--muted); font-size: 14px; margin: 0 0 8px; }

/* Tabla de stock */
.stock-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
  border: 1px solid var(--border); border-radius: 10px;
  overflow: hidden;
}
.stock-table th, .stock-table td { padding: 10px 14px; text-align: left; vertical-align: middle; }
.stock-table th {
  font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: .5px;
  color: var(--muted); border-bottom: 1px solid var(--border);
}
.stock-table tbody tr + tr td { border-top: 1px solid var(--border); }
.stock-table .num { text-align: right; font-variant-numeric: tabular-nums; font-weight: 600; }
.sort { color: inherit; text-decoration: none; white-space: nowrap; }
.sort:hover { color: var(--text); }
.product-name { font-weight: 600; overflow-wrap: anywhere; }
.product-sku { color: var(--muted); font-size: 13px; }
.muted { color: var(--muted); white-space: nowrap; }
.alias-code {
  padding: 2px 8px; border-radius: 6px;
  background: var(--chip-bg); font-weight: 700; font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.components { display: flex; flex-direction: column; gap: 4px; }
.component { display: flex; align-items: center; gap: 8px; }
.qty {
  min-width: 44px; text-align: center;
  padding: 2px 8px; border-radius: 6px;
  font-weight: 700; font-variant-numeric: tabular-nums;
}
.qty.ok  { background: var(--ok-bg);  color: var(--ok-fg); }
.qty.low { background: var(--low-bg); color: var(--low-fg); }
.qty.out { background: var(--out-bg); color: var(--out-fg); }
.empty { padding: 24px 16px; color: var(--muted); text-align: center !important; }

/* En el celular cada fila se muestra como una tarjeta */
@media (max-width: 720px) {
  .stock-table, .stock-table tbody, .stock-table tr, .stock-table td { display: block; width: 100%; }
  .stock-table thead tr { display: flex; gap: 16px; padding: 10px 14px; }
  .stock-table thead th { display: none; padding: 0; border: 0; }
  .stock-table thead th:nth-child(-n+2), .stock-table thead th:nth-child(4) { display: block; }
  .stock-table tbody tr { padding: 10px 14px; }
  .stock-table tbody tr + tr td { border-top: 0; }
  .stock-table tbody tr + tr { border-top: 1px solid var(--border); }
  .stock-table td { padding: 3px 0; display: flex; justify-content: space-between; gap: 12px; text-align: right; }
  .stock-table td::before { content: attr(data-label); color: var(--muted); font-weight: 400; text-align: left; }
  .stock-table td.product-name { display: block; text-align: left; font-size: 16px; padding-bottom: 6px; }
  .stock-table td.product-name::before { content: none; }
  .stock-table td.empty::before { content: none; }
  .components { align-items: flex-end; }
}

/* Login */
.login-wrap { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login-card {
  width: 100%; max-width: 360px;
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  padding: 28px 24px;
}
.login-card h1 { margin-bottom: 20px; }
.login-card label { display: block; font-size: 14px; color: var(--muted); margin: 12px 0 6px; }
.login-card input {
  width: 100%; padding: 10px 12px;
  border: 1px solid var(--border); border-radius: 8px;
  background: var(--bg); color: var(--text); font: inherit;
}
.login-card button {
  width: 100%; margin-top: 20px; padding: 11px;
  border: 0; border-radius: 8px;
  background: var(--accent); color: #fff; font: inherit; font-weight: 600; cursor: pointer;
}
.notice { padding: 10px 12px; border-radius: 8px; font-size: 14px; margin-bottom: 8px; }
.notice.error { background: var(--out-bg); color: var(--out-fg); }
.notice.info  { background: var(--chip-bg); color: var(--text); }

/* Reposición: tabla más ancha */
main.wide { max-width: 1400px; }
.reposicion th, .reposicion td { padding: 10px 10px; }
.reposicion th { white-space: nowrap; }
@media (max-width: 720px) {
  .reposicion thead th:nth-child(-n+4) { display: none; }
  .reposicion thead th:first-child, .reposicion thead th:nth-child(8), .reposicion thead th:nth-child(10) { display: block; }
  .reposicion td.product-name span { display: block; }
}

/* Que el menú no se parta en dos renglones en el celular */
.brand, .topbar nav a, .link-button { white-space: nowrap; }
@media (max-width: 420px) {
  .topbar nav { gap: 12px; }
  .brand { font-size: 14px; }
}