* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Tahoma, Arial, sans-serif;
  background: #f4f6f8;
  color: #1c2430;
}
.hidden { display: none !important; }
.muted { color: #667085; }
.small { font-size: 13px; }
.error {
  background: #fdecea;
  color: #a1211f;
  border: 1px solid #f5c2c0;
  border-radius: 8px;
  padding: 10px 12px;
  margin: 12px 0;
}
.loading { text-align: center; padding: 24px; color: #667085; }

/* شاشة الدخول */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}
.login-card {
  background: #fff;
  border-radius: 14px;
  box-shadow: 0 4px 24px rgba(0,0,0,.08);
  padding: 28px;
  width: 100%;
  max-width: 420px;
}
.login-card h1 { margin: 0 0 8px; font-size: 24px; }
label { display: block; margin: 12px 0; font-weight: 600; font-size: 14px; }
input, select {
  width: 100%;
  margin-top: 6px;
  padding: 10px 12px;
  border: 1px solid #d0d5dd;
  border-radius: 8px;
  font-size: 15px;
  background: #fff;
}
.btn-primary, .btn-secondary {
  border: 0;
  border-radius: 8px;
  padding: 11px 18px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
}
.btn-primary { background: #175cd3; color: #fff; width: 100%; margin-top: 8px; }
.btn-secondary { background: #eef2f6; color: #1c2430; }
.btn-secondary.small { padding: 8px 12px; font-size: 13px; }
details { margin-top: 16px; }
details summary { cursor: pointer; font-weight: 700; }

/* الشريط العلوي والتبويبات */
.topbar {
  background: #12233a;
  color: #fff;
  padding: 12px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.brand { font-size: 19px; font-weight: 800; }
.user-info { font-size: 14px; color: #dbe4f0; }
.topbar-right { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.tabs {
  display: flex;
  gap: 6px;
  padding: 10px 12px;
  overflow-x: auto;
  background: #fff;
  border-bottom: 1px solid #e4e7ec;
}
.tab-btn {
  border: 1px solid transparent;
  background: transparent;
  padding: 9px 14px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  white-space: nowrap;
}
.tab-btn.active { background: #175cd3; color: #fff; }
main { padding: 16px; max-width: 1200px; margin: 0 auto; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* الكروت والجداول */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}
.kpi {
  background: #fff;
  border-radius: 12px;
  padding: 16px;
  box-shadow: 0 1px 4px rgba(0,0,0,.06);
}
.kpi .label { color: #667085; font-size: 13px; }
.kpi .value { font-size: 22px; font-weight: 800; margin-top: 6px; }
.kpi .sub { color: #667085; font-size: 12px; margin-top: 4px; }
.kpi.danger .value { color: #b42318; }
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}
.card {
  background: #fff;
  border-radius: 12px;
  padding: 16px;
  box-shadow: 0 1px 4px rgba(0,0,0,.06);
}
.card h3 { margin: 0 0 10px; }
.card .row { display: flex; justify-content: space-between; padding: 4px 0; font-size: 14px; }
.card .row b { font-variant-numeric: tabular-nums; }
.charts {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 12px;
}
.chart-card { background: #fff; border-radius: 12px; padding: 16px; box-shadow: 0 1px 4px rgba(0,0,0,.06); }
.chart-card h3 { margin: 0 0 12px; font-size: 15px; }
.filters {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  background: #fff;
  border-radius: 12px;
  padding: 12px;
  margin-bottom: 12px;
}
.filters label { margin: 0; flex: 1 1 160px; }
.table-wrap { overflow-x: auto; background: #fff; border-radius: 12px; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { padding: 10px 12px; border-bottom: 1px solid #eef1f4; text-align: right; white-space: nowrap; }
th { background: #f8fafc; font-size: 13px; color: #475467; }
tbody tr:nth-child(odd):not(.overdue):not(.soon) { background: #fff; }
tbody tr:nth-child(even):not(.overdue):not(.soon) { background: #f1f5f9; }
tbody tr { cursor: pointer; }
tr.overdue td { background: #fff1f0; }
tr.soon td { background: #fff8e6; }
tr.selected td { background: #dbeafe; }
.badge {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
}
.badge.red { background: #fdecea; color: #a1211f; }
.badge.amber { background: #fff3cd; color: #7a5b00; }
.badge.green { background: #e6f4ea; color: #137333; }
.subtitle { font-size: 17px; font-weight: 800; margin: 8px 0 12px; }
.list .item {
  display: block;
  width: 100%;
  background: #fff;
  border-radius: 10px;
  padding: 12px 14px;
  margin-bottom: 8px;
  border: 1px solid transparent;
  color: inherit;
  font: inherit;
  text-align: right;
  cursor: pointer;
  box-shadow: 0 1px 4px rgba(0,0,0,.05);
}
.list .item:hover { outline: 2px solid #175cd3; }
.list .item.selected { background: #dbeafe; border-color: #175cd3; }
.list .item:focus-visible { outline: 2px solid #175cd3; outline-offset: 2px; }
.customer-entry { margin-bottom: 8px; }
.customer-entry .item { margin-bottom: 0; }
.customer-detail-inline { margin-top: 8px; }

@media (max-width: 600px) {
  body { min-width: 320px; }
  .login-wrap {
    min-height: 100vh;
    min-height: 100dvh;
    padding: max(12px, env(safe-area-inset-top)) 12px max(12px, env(safe-area-inset-bottom));
  }
  .login-card { padding: 22px 18px; }
  .topbar {
    padding: max(12px, env(safe-area-inset-top)) 12px 12px;
    align-items: flex-start;
  }
  .topbar-right { width: 100%; }
  .user-info { flex: 1 1 100%; }
  .tabs {
    position: sticky;
    top: 0;
    z-index: 5;
    padding: 8px;
    scroll-snap-type: x proximity;
  }
  .tab-btn {
    min-height: 44px;
    padding: 9px 12px;
    scroll-snap-align: start;
  }
  main { padding: 12px 10px max(16px, env(safe-area-inset-bottom)); }
  .kpi-grid { grid-template-columns: repeat(auto-fit, minmax(145px, 1fr)); gap: 8px; }
  .kpi { padding: 12px; }
  .kpi .value { font-size: 19px; }
  .cards-grid, .charts { grid-template-columns: minmax(0, 1fr); }
  .filters { padding: 10px; gap: 8px; }
  .filters label { flex-basis: 100%; }
  input, select { min-height: 44px; }
  .chart-card { min-width: 0; }
  th, td { padding: 9px 10px; }
}