* { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --green: #16a34a;
  --red: #dc2626;
  --bg: #f1f5f9;
  --card: #ffffff;
  --border: #e2e8f0;
  --text: #0f172a;
  --muted: #64748b;
}
body {
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
}
.topbar {
  background: var(--primary);
  color: #fff;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: 0 2px 8px rgba(0,0,0,.12);
}
.brand { font-size: 1.25rem; font-weight: 700; white-space: nowrap; }
.nav { display: flex; gap: 8px; flex-wrap: wrap; }
.nav-btn {
  background: rgba(255,255,255,.15);
  color: #fff;
  border: none;
  padding: 9px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-size: .9rem;
  font-weight: 600;
  transition: background .15s;
}
.nav-btn:hover { background: rgba(255,255,255,.25); }
.nav-btn.active { background: #fff; color: var(--primary-dark); }
main { padding: 20px; max-width: 1200px; margin: 0 auto; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: 0 1px 3px rgba(0,0,0,.05);
}
h2 { margin-bottom: 16px; font-size: 1.3rem; }

.btn {
  background: var(--primary);
  color: #fff;
  border: none;
  padding: 10px 18px;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  font-size: .9rem;
}
.btn:hover { background: var(--primary-dark); }
.btn-green { background: var(--green); }
.btn-green:hover { background: #15803d; }
.btn-red { background: var(--red); }
.btn-red:hover { background: #b91c1c; }
.btn-outline { background: transparent; color: var(--primary); border: 1px solid var(--primary); }
.btn-outline:hover { background: #eef2ff; }
.btn-sm { padding: 6px 10px; font-size: .8rem; }

.toolbar { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 16px; align-items: center; }
.toolbar .spacer { flex: 1; }
input, select, textarea {
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: .9rem;
  width: 100%;
  font-family: inherit;
}
input:focus, select:focus, textarea:focus { outline: 2px solid #bfdbfe; border-color: var(--primary); }
.field { margin-bottom: 12px; }
.field label { display: block; font-size: .82rem; color: var(--muted); margin-bottom: 4px; font-weight: 600; }
.input-sm { width: 120px; }
.input-inline { width: auto; }

table { width: 100%; border-collapse: collapse; }
th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); font-size: .88rem; }
th { background: #f8fafc; color: var(--muted); font-size: .78rem; text-transform: uppercase; letter-spacing: .03em; }
tr:hover td { background: #f8fafc; }
.num { text-align: right; }

.badge { padding: 3px 10px; border-radius: 999px; font-size: .74rem; font-weight: 700; }
.badge-in { background: #dcfce7; color: #15803d; }
.badge-out { background: #fee2e2; color: #b91c1c; }
.badge-low { background: #fef3c7; color: #b45309; }
.badge-ok { background: #dcfce7; color: #15803d; }

.row { display: flex; gap: 12px; flex-wrap: wrap; }
.row > * { flex: 1; min-width: 140px; }
.summary-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px,1fr)); gap: 14px; }
.summary-box { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 18px; text-align: center; }
.summary-box .num-big { font-size: 1.8rem; font-weight: 800; color: var(--primary); }
.summary-box .label { color: var(--muted); font-size: .82rem; margin-top: 4px; }

.item-row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-bottom: 8px; }
.item-row select { flex: 2; min-width: 180px; }
.item-row .qty { flex: 0 0 90px; }
.item-row .price { flex: 0 0 110px; }

.modal-backdrop {
  position: fixed; inset: 0; background: rgba(0,0,0,.45);
  display: none; align-items: center; justify-content: center; z-index: 100; padding: 20px;
}
.modal-backdrop.show { display: flex; }
.modal {
  background: #fff; border-radius: 12px; padding: 24px; width: 100%; max-width: 520px;
  max-height: 90vh; overflow: auto; box-shadow: 0 10px 30px rgba(0,0,0,.2);
}
.modal h3 { margin-bottom: 16px; }
.modal .actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 16px; }

.detail-row { display: flex; padding: 6px 0; border-bottom: 1px dashed var(--border); font-size: .9rem; }
.detail-row .k { width: 140px; color: var(--muted); }
.detail-row .v { flex: 1; font-weight: 600; }

.search { max-width: 320px; }
.empty { text-align: center; color: var(--muted); padding: 30px; }

.toast {
  position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%) translateY(120%);
  background: #0f172a; color: #fff; padding: 12px 22px; border-radius: 8px;
  transition: transform .3s; z-index: 200; font-size: .9rem; box-shadow: 0 4px 12px rgba(0,0,0,.2);
}
.toast.show { transform: translateX(-50%) translateY(0); }
.toast.error { background: var(--red); }

@media (max-width: 640px) {
  main { padding: 12px; }
  .table-wrap { overflow-x: auto; }
  .topbar { gap: 10px; }
  .nav-btn { flex: 1; padding: 8px 6px; font-size: .8rem; }
  .item-row select { flex: 1 1 100%; }
}