:root {
  color-scheme: dark;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #07111f;
  color: #f5f7fb;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: linear-gradient(135deg, #08131f, #12263e);
  min-height: 100vh;
}

.page-layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 240px;
  padding: 24px 16px;
  background: rgba(3, 10, 19, 0.85);
  border-right: 1px solid rgba(255,255,255,0.08);
}

.sidebar h3 {
  margin: 0 0 12px;
  color: #7ad0ff;
}

.tree-nav {
  display: grid;
  gap: 8px;
}

.tree-button {
  display: block;
  padding: 10px 12px;
  border-radius: 10px;
  text-decoration: none;
  color: #f5f7fb;
  background: rgba(255,255,255,0.04);
  border: 1px solid transparent;
  font-weight: 600;
}

.tree-button:hover,
.tree-button.active {
  background: #2f8cff;
  border-color: #2f8cff;
}

.app-shell {
  flex: 1;
  max-width: 1400px;
  margin: 0 auto;
  padding: 24px;
  width: 100%;
}

.wide-panel {
  max-width: 760px;
}

.hero {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: #7ad0ff;
  font-size: 0.8rem;
  margin: 0 0 6px;
}

h1, h2, p { margin-top: 0; }

.summary-card, .panel {
  background: rgba(8, 18, 30, 0.82);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 16px;
  padding: 16px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
}

.summary-card {
  min-width: 180px;
  text-align: center;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 16px;
}

.stack { display: grid; gap: 10px; }
label { display: grid; gap: 6px; font-weight: 600; }
input, select, button {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.12);
  font: inherit;
}

button {
  cursor: pointer;
  background: #2f8cff;
  color: white;
  border: none;
  font-weight: 700;
}

button:hover { background: #2473de; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; min-width: 900px; }
th, td { padding: 12px 10px; text-align: left; border-bottom: 1px solid rgba(255,255,255,0.08); }
.pill {
  display: inline-block;
  background: rgba(122,208,255,0.16);
  color: #7ad0ff;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 0.85rem;
}

.status-pill {
  display: inline-block;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 700;
  white-space: nowrap;
}

.status-pill.in-stock {
  background-color: rgba(34, 197, 94, 0.18) !important;
  color: #4ade80 !important;
}

.status-pill.low-stock {
  background-color: rgba(249, 115, 22, 0.18) !important;
  color: #fb923c !important;
}

.status-pill.out-of-stock {
  background-color: rgba(248, 113, 113, 0.18) !important;
  color: #f87171 !important;
}

.section-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; gap: 10px; }
.section-head.compact { margin-bottom: 14px; }
.activity-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.activity-list li {
  background: rgba(255,255,255,0.04);
  border-radius: 10px;
  padding: 10px 12px;
}

.nav-link {
  display: inline-block;
  color: #7ad0ff;
  text-decoration: none;
  font-weight: 700;
}

.nav-link:hover {
  text-decoration: underline;
}

.search-input {
  flex: 1;
  min-width: 220px;
}

.muted {
  color: #8aa0b7;
}

.scanner-controls {
  display: flex;
  gap: 8px;
}

.secondary-button {
  background: #4b5563;
}

.secondary-button:hover {
  background: #374151;
}

.qr-scanner-panel {
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 12px;
  padding: 10px;
  background: rgba(255,255,255,0.03);
}

.qr-scanner-panel video {
  width: 100%;
  max-height: 220px;
  border-radius: 10px;
  background: #000;
}

.hidden {
  display: none;
}

.photo-preview {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px dashed rgba(255,255,255,0.16);
  border-radius: 10px;
  color: #8aa0b7;
  background: rgba(255,255,255,0.03);
  overflow: hidden;
}

.photo-preview img {
  width: 100%;
  max-height: 180px;
  object-fit: cover;
}

.item-thumbnail {
  width: 64px;
  height: 64px;
  object-fit: cover;
  border-radius: 8px;
}

@media (max-width: 760px) {
  .page-layout { flex-direction: column; }
  .sidebar { width: 100%; border-right: none; border-bottom: 1px solid rgba(255,255,255,0.08); }
  .grid { grid-template-columns: 1fr; }
  .hero { flex-direction: column; align-items: flex-start; }
}