:root {
  --bg: #f4f6f8;
  --surface: #ffffff;
  --border: #dde3ea;
  --text: #1f2937;
  --text-muted: #6b7280;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --success: #16a34a;
  --danger: #dc2626;
  --danger-bg: #fef2f2;
  --warning: #d97706;
  --radius: 8px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

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

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.topbar h1 { font-size: 18px; margin: 0; }

.topbar .who { color: var(--text-muted); font-size: 14px; margin-inline-end: 12px; }

button {
  cursor: pointer;
  font-family: inherit;
  font-size: 14px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 8px 14px;
}

button.primary { background: var(--primary); color: #fff; border-color: var(--primary); }
button.primary:hover { background: var(--primary-dark); }
button.danger { background: var(--danger); color: #fff; border-color: var(--danger); }
button.ghost { background: transparent; border-color: transparent; color: var(--primary); }
button:disabled { opacity: 0.5; cursor: not-allowed; }

.layout { display: flex; min-height: calc(100vh - 53px); }

.sidebar {
  width: 220px;
  background: var(--surface);
  border-inline-end: 1px solid var(--border);
  padding: 16px 0;
}
.sidebar a {
  display: block;
  padding: 10px 20px;
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
}
.sidebar a.active, .sidebar a:hover { background: var(--bg); color: var(--primary); font-weight: 600; }

.main { flex: 1; padding: 24px; max-width: 1100px; }

.stats-bar { display: flex; gap: 16px; margin-bottom: 24px; flex-wrap: wrap; }
.stat-tile {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 20px;
  min-width: 160px;
}
.stat-tile .label { font-size: 12px; color: var(--text-muted); text-transform: uppercase; letter-spacing: .04em; }
.stat-tile .value { font-size: 26px; font-weight: 700; margin-top: 4px; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
}

.row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }

label { display: block; font-size: 12px; color: var(--text-muted); margin-bottom: 4px; }

select, input {
  font-family: inherit;
  font-size: 14px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
  width: 100%;
}

.field { margin-bottom: 12px; min-width: 160px; }
.field.optional label::after { content: ' (اختياري)'; color: var(--text-muted); font-weight: normal; }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: start; padding: 8px 10px; border-bottom: 1px solid var(--border); }
th { color: var(--text-muted); font-weight: 600; font-size: 12px; text-transform: uppercase; }

.invoice-block { border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 14px; overflow: hidden; }
.invoice-header {
  display: flex; justify-content: space-between; padding: 10px 14px;
  background: var(--bg); font-weight: 600; font-size: 14px;
}
.invoice-items { padding: 4px 14px; font-size: 13px; color: var(--text-muted); }
.invoice-items table { font-size: 12.5px; }

.return-alert { color: var(--danger); background: var(--danger-bg); padding: 8px 12px; border-radius: var(--radius); font-size: 13px; margin-bottom: 6px; }

.summary-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 14px; margin-top: 12px; }
.summary-grid .item .label { font-size: 12px; color: var(--text-muted); }
.summary-grid .item .value { font-size: 20px; font-weight: 700; }
.summary-grid .item.remaining.zero .value { color: var(--success); }
.summary-grid .item.remaining.nonzero .value { color: var(--danger); }

.banner { padding: 10px 14px; border-radius: var(--radius); margin-bottom: 16px; font-size: 14px; }
.banner.error { background: var(--danger-bg); color: var(--danger); border: 1px solid #fecaca; }
.banner.success { background: #f0fdf4; color: var(--success); border: 1px solid #bbf7d0; }

.item-rows-table input { padding: 6px 8px; font-size: 13px; }
.remove-row { color: var(--danger); background: none; border: none; cursor: pointer; font-size: 16px; padding: 2px 8px; }

.login-wrap {
  display: flex; align-items: center; justify-content: center; min-height: 100vh;
}
.login-card { width: 340px; }
.login-card h1 { text-align: center; font-size: 20px; margin-bottom: 4px; }
.login-card p.sub { text-align: center; color: var(--text-muted); font-size: 13px; margin-top: 0; margin-bottom: 20px; }

.muted { color: var(--text-muted); font-size: 13px; }
.empty-state { color: var(--text-muted); font-size: 14px; padding: 20px 0; text-align: center; }

.archive-line { display: flex; justify-content: space-between; padding: 10px 14px; border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 8px; cursor: pointer; }
.archive-line:hover { background: var(--bg); }

.warehouse-status-green { color: var(--success); }
.warehouse-status-red { color: var(--danger); }
.warehouse-status-pending { color: var(--text-muted); }

.warehouse-note-block { margin: 8px 14px 14px; padding: 8px 12px; border-radius: var(--radius); font-size: 13px; background: var(--bg); }
.warehouse-note-block.warehouse-status-green { background: #f0fdf4; }
.warehouse-note-block.warehouse-status-red { background: var(--danger-bg); }