:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #666666;
  --border: #dddddd;
  --accent: #1a5fb4;
  --danger: #c0392b;
  --warn: #b56a00;
  --ok: #1a7f37;
  --tile-bg: #f4f4f4;
  --row-alt: #fafafa;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181c;
    --fg: #e8e8e8;
    --muted: #a0a0a0;
    --border: #3a3d42;
    --accent: #6ea8fe;
    --danger: #ff6b5e;
    --warn: #e0a333;
    --ok: #4fce6e;
    --tile-bg: #22252a;
    --row-alt: #1c1f24;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.5;
}

a { color: var(--accent); }

h1, h2, h3 { line-height: 1.25; }

.muted { color: var(--muted); font-weight: normal; }

/* --- header / nav --- */

.site-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1.25rem;
  border-bottom: 1px solid var(--border);
}

.site-header .brand {
  font-weight: 700;
  text-decoration: none;
}

.site-header nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  flex: 1;
}

.site-header nav a { text-decoration: none; }
.site-header nav a:hover { text-decoration: underline; }

.user-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9rem;
}

.username { color: var(--muted); }

.inline-form { display: inline; }

main {
  max-width: 60rem;
  margin: 0 auto;
  padding: 1.25rem;
}

.site-footer {
  max-width: 60rem;
  margin: 0 auto;
  padding: 1rem 1.25rem 2rem;
  color: var(--muted);
  font-size: 0.85rem;
}

/* --- flash messages --- */

.flash-error, .flash-notice {
  padding: 0.6rem 0.8rem;
  border-radius: 0.3rem;
  margin: 0 0 1rem;
}

.flash-error {
  border: 1px solid var(--danger);
  background: color-mix(in srgb, var(--danger) 10%, transparent);
  color: var(--danger);
}

.flash-notice {
  border: 1px solid var(--ok);
  background: color-mix(in srgb, var(--ok) 10%, transparent);
  color: var(--ok);
}

/* --- tables --- */

table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.5rem 0 1.5rem;
}

th, td {
  text-align: left;
  padding: 0.4rem 0.6rem;
  border-bottom: 1px solid var(--border);
}

tbody tr:nth-child(even) { background: var(--row-alt); }

.table-scroll { overflow-x: auto; }

/* Quantities: right-aligned, tabular figures so columns line up. */
.qty {
  font-variant-numeric: tabular-nums;
  text-align: right;
  white-space: nowrap;
}

/* --- forms / filters --- */

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  gap: 0.75rem;
  margin: 0.75rem 0 1.25rem;
}

.filter-bar label {
  display: flex;
  flex-direction: column;
  font-size: 0.85rem;
  gap: 0.25rem;
}

form label {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin: 0 0 0.75rem;
  font-size: 0.9rem;
}

input, select, textarea, button {
  font: inherit;
  padding: 0.35rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 0.3rem;
  background: var(--bg);
  color: var(--fg);
}

textarea { resize: vertical; }

/* --- buttons --- */

.btn {
  display: inline-block;
  cursor: pointer;
  padding: 0.4rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 0.3rem;
  background: var(--tile-bg);
  color: var(--fg);
  text-decoration: none;
  font-weight: 600;
}

.btn:hover { border-color: var(--accent); }

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.btn-danger {
  background: transparent;
  border-color: var(--danger);
  color: var(--danger);
}

.btn-danger:hover { background: color-mix(in srgb, var(--danger) 12%, transparent); }

.btn-small {
  padding: 0.2rem 0.6rem;
  font-size: 0.8rem;
  font-weight: normal;
}

/* --- badges --- */

.badge {
  display: inline-block;
  padding: 0.1rem 0.5rem;
  border-radius: 1rem;
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--tile-bg);
  border: 1px solid var(--border);
}

.badge-low {
  background: color-mix(in srgb, var(--danger) 12%, transparent);
  border-color: var(--danger);
  color: var(--danger);
}

.badge-warn {
  background: color-mix(in srgb, var(--warn) 14%, transparent);
  border-color: var(--warn);
  color: var(--warn);
}

.badge-ok {
  background: color-mix(in srgb, var(--ok) 12%, transparent);
  border-color: var(--ok);
  color: var(--ok);
}

/* --- stat tiles (dashboard) --- */

.stat-tiles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(8rem, 1fr));
  gap: 0.75rem;
  margin: 1rem 0;
}

.tile {
  background: var(--tile-bg);
  border: 1px solid var(--border);
  border-radius: 0.4rem;
  padding: 0.75rem;
  text-align: center;
}

.tile-value {
  display: block;
  font-size: 1.6rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.tile-label {
  display: block;
  color: var(--muted);
  font-size: 0.8rem;
}

/* --- cards (login, forms, wizard steps) --- */

.card {
  max-width: 28rem;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 1.25rem;
  margin: 1rem 0;
  background: var(--tile-bg);
}

.wizard-step {
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 1rem 1.25rem;
  margin: 0 0 1rem;
}

.wizard-step h2 {
  margin-top: 0;
  font-size: 1.05rem;
}

.wizard-step.done { opacity: 0.6; }

/* --- pagination --- */

.pager {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 1rem 0;
  font-size: 0.9rem;
}

.pager-links { display: flex; gap: 1rem; }

/* --- scan --- */

.scan-viewfinder {
  position: relative;
  width: 100%;
  max-width: 28rem;
  aspect-ratio: 4 / 3;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  overflow: hidden;
  background: #000;
  margin: 0.75rem 0;
}

.scan-viewfinder video,
.scan-viewfinder canvas {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.scan-viewfinder .scan-hint {
  position: absolute;
  inset: auto 0 0 0;
  padding: 0.4rem 0.6rem;
  background: rgba(0, 0, 0, 0.6);
  color: #fff;
  font-size: 0.8rem;
  text-align: center;
}

/* --- printable labels --- */

.label-sheet {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.label {
  border: 1px dashed var(--border);
  border-radius: 0.3rem;
  padding: 0.5rem 0.75rem;
  text-align: center;
  width: 12rem;
}

.label .ean13 { width: 100%; height: auto; }
.label .label-name { font-size: 0.85rem; margin: 0.25rem 0 0; }

/* --- print --- */

.no-print { }

@media print {
  .no-print { display: none !important; }
  body { background: #fff; color: #000; }
  main { max-width: none; padding: 0; margin: 0; }
  .label-sheet { gap: 0.25rem; }
}

/* --- responsive: tables stack into cards under 40rem --- */

@media (max-width: 40rem) {
  .site-header nav { gap: 0.6rem; font-size: 0.9rem; }

  table.stack, table.stack thead, table.stack tbody, table.stack tr, table.stack td {
    display: block;
    width: 100%;
  }

  table.stack thead { display: none; }

  table.stack tr {
    border: 1px solid var(--border);
    border-radius: 0.4rem;
    margin: 0 0 0.6rem;
    padding: 0.4rem 0.6rem;
  }

  table.stack td {
    border: none;
    padding: 0.2rem 0;
    text-align: left !important;
  }

  table.stack td[data-label]::before {
    content: attr(data-label);
    display: block;
    font-size: 0.75rem;
    color: var(--muted);
  }

  .filter-bar { flex-direction: column; align-items: stretch; }
}