:root {
  --bg: #f3f6fa;
  --surface: #ffffff;
  --surface-alt: #f8fafc;
  --border: #dce4ee;
  --border-strong: #c2cedc;
  --text: #162235;
  --text-muted: #5a6b82;
  --primary: #1d4ed8;
  --primary-hover: #1e40af;
  --primary-soft: #eff6ff;
  --up-color: #0369a1;
  --up-bg: #e0f2fe;
  --down-color: #b45309;
  --down-bg: #fef3c7;
  --success: #15803d;
  --success-bg: #dcfce7;
  --warn: #c2410c;
  --warn-bg: #ffedd5;
  --danger: #b91c1c;
  --danger-bg: #fee2e2;
  --radius: 10px;
  --shadow: 0 2px 10px rgba(15, 23, 42, 0.05);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  font-size: 13px;
  line-height: 1.45;
  color: var(--text);
  background: var(--bg);
}

button, input, select, textarea {
  font-family: inherit;
  font-size: 13px;
}

/* Header & Navigation */
.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  background: #0f2544;
  color: #fff;
  padding: 0 20px;
  height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.14);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.brand-title {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.2px;
  white-space: nowrap;
}

.db-badge {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.15);
  color: #dbeafe;
  white-space: nowrap;
}

.db-badge.ok {
  background: rgba(34, 197, 94, 0.24);
  color: #bbf7d0;
}

.nav-tabs {
  display: flex;
  align-items: center;
  gap: 6px;
  overflow-x: auto;
}

.nav-tab {
  border: none;
  background: transparent;
  color: #cbd5e1;
  padding: 8px 14px;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  white-space: nowrap;
  transition: all 0.15s;
}

.nav-tab:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

.nav-tab.active {
  background: #2563eb;
  color: #fff;
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 7px 13px;
  border-radius: 7px;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text);
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s, border-color 0.15s;
}

.btn:hover {
  background: #f1f5f9;
}

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

.btn-primary:hover {
  background: var(--primary-hover);
}

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

.btn-success:hover {
  background: #166534;
}

.btn-warn {
  background: #ea580c;
  border-color: #ea580c;
  color: #fff;
}

.btn-danger {
  background: #fff;
  border-color: #fca5a5;
  color: var(--danger);
}

.btn-danger:hover {
  background: var(--danger-bg);
}

.btn-sm {
  padding: 4px 9px;
  font-size: 12px;
  border-radius: 6px;
}

/* Layout Containers */
.main-container {
  max-width: 1580px;
  margin: 0 auto;
  padding: 16px 20px 36px;
}

.view-panel {
  display: none;
}

.view-panel.active {
  display: block;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 14px 16px;
  margin-bottom: 14px;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 12px;
}

.card-title {
  font-size: 15px;
  font-weight: 700;
  margin: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* KPI Grid */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 12px;
  margin-bottom: 14px;
}

.kpi-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  box-shadow: var(--shadow);
  border-top: 4px solid var(--primary);
}

.kpi-card.up { border-top-color: var(--up-color); }
.kpi-card.confirmed { border-top-color: var(--success); }
.kpi-card.down { border-top-color: var(--down-color); }
.kpi-card.warn { border-top-color: var(--warn); }

.kpi-label {
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 6px;
}

.kpi-val {
  font-size: 24px;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  margin-bottom: 6px;
}

.kpi-sub {
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* Badges */
.pill {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  white-space: nowrap;
}

.pill-up { background: var(--up-bg); color: var(--up-color); }
.pill-down { background: var(--down-bg); color: var(--down-color); }
.pill-ok { background: var(--success-bg); color: var(--success); }
.pill-warn { background: var(--warn-bg); color: var(--warn); }
.pill-danger { background: var(--danger-bg); color: var(--danger); }
.pill-muted { background: #e2e8f0; color: #475569; }

.subtabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.subtab {
  padding: 7px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
  font-weight: 600;
  cursor: pointer;
}

.subtab.active {
  background: var(--primary-soft);
  border-color: var(--primary);
  color: var(--primary);
}

/* Filter Bar */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: 12px;
}

.filter-bar select,
.filter-bar input[type="text"],
.form-control {
  padding: 6px 10px;
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  background: #fff;
  color: var(--text);
  min-height: 33px;
}

.form-control:focus, .filter-bar select:focus, .filter-bar input:focus {
  outline: 2px solid rgba(37, 99, 235, 0.25);
  border-color: var(--primary);
}

/* Tables */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12.5px;
}

th, td {
  padding: 8px 9px;
  border-bottom: 1px solid #e7edf5;
  text-align: left;
  vertical-align: middle;
}

th {
  background: #f1f5f9;
  color: #334155;
  font-weight: 700;
  white-space: nowrap;
  position: sticky;
  top: 0;
  z-index: 2;
}

tr:hover td {
  background: #f8fbff;
}

tr.dirty-row td {
  background: #fffbeb;
}

.num {
  text-align: right;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.pos-num { color: var(--success); font-weight: 700; }
.neg-num { color: var(--danger); font-weight: 700; }

/* Entry Split Layout */
.entry-layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 14px;
  align-items: start;
}

@media (max-width: 1050px) {
  .entry-layout {
    grid-template-columns: 1fr;
  }
}

.sheet-sidebar {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 12px;
  position: sticky;
  top: 70px;
  max-height: calc(100vh - 90px);
  display: flex;
  flex-direction: column;
}

.sheet-list {
  overflow-y: auto;
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-right: 2px;
}

.sheet-card {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px 10px;
  cursor: pointer;
  background: var(--surface-alt);
  transition: all 0.12s;
}

.sheet-card:hover {
  border-color: #93c5fd;
  background: #f8fbff;
}

.sheet-card.active {
  border-color: var(--primary);
  background: var(--primary-soft);
  box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.15);
}

.sheet-card-title {
  font-weight: 700;
  font-size: 12.5px;
  margin-bottom: 4px;
  word-break: break-word;
}

.sheet-card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 6px;
  font-size: 11.5px;
  color: var(--text-muted);
}

/* Sheet Header Form */
.dir-switch {
  display: inline-flex;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  overflow: hidden;
  background: var(--surface-alt);
}

.dir-opt {
  padding: 7px 14px;
  border: none;
  background: transparent;
  cursor: pointer;
  font-weight: 700;
  color: var(--text-muted);
}

.dir-opt.active-up {
  background: var(--up-color);
  color: #fff;
}

.dir-opt.active-down {
  background: #d97706;
  color: #fff;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(175px, 1fr));
  gap: 10px;
  margin-top: 10px;
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.field-group label {
  font-size: 11.5px;
  font-weight: 700;
  color: var(--text-muted);
}

/* Editable Grid Inputs */
.cell-input {
  width: 100%;
  padding: 5px 6px;
  border: 1px solid #d5dfec;
  border-radius: 5px;
  background: #fff;
  font-size: 12.5px;
}

.cell-input:focus {
  border-color: var(--primary);
  outline: 2px solid rgba(37, 99, 235, 0.2);
}

.cell-num {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* Smart Combobox Dropdown */
.combo-cell {
  position: relative;
  min-width: 220px;
}

.combo-dropdown {
  position: fixed;
  z-index: 200;
  width: 390px;
  max-height: 310px;
  overflow-y: auto;
  background: #fff;
  border: 1px solid var(--border-strong);
  border-radius: 9px;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.18);
  padding: 6px;
}

.combo-opt {
  padding: 7px 9px;
  border-radius: 6px;
  cursor: pointer;
  border-bottom: 1px solid #f1f5f9;
}

.combo-opt:hover {
  background: var(--primary-soft);
}

.combo-opt-title {
  font-weight: 700;
  color: var(--text);
}

.combo-opt-sub {
  font-size: 11.5px;
  color: var(--text-muted);
  margin-top: 2px;
}

.combo-create-btn {
  width: 100%;
  text-align: left;
  padding: 8px 10px;
  border-radius: 6px;
  border: 1px dashed var(--primary);
  background: #eff6ff;
  color: var(--primary);
  font-weight: 700;
  cursor: pointer;
  margin-top: 4px;
}

.combo-create-btn:hover {
  background: #dbeafe;
}

/* Sticky Entry Footer */
.entry-footer {
  position: sticky;
  bottom: 10px;
  z-index: 15;
  background: #0f2544;
  color: #fff;
  border-radius: 10px;
  padding: 11px 16px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 12px;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.25);
}

.entry-totals {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 13px;
}

.entry-totals strong {
  font-size: 15px;
  color: #fde047;
}

/* Modal */
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 300;
  background: rgba(15, 23, 42, 0.55);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.modal-backdrop.open {
  display: flex;
}

.modal {
  background: #fff;
  border-radius: 12px;
  width: 100%;
  max-width: 980px;
  max-height: 88vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 50px rgba(15, 23, 42, 0.3);
}

.modal-header {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-body {
  padding: 16px 18px;
  overflow-y: auto;
}

.modal-footer {
  padding: 12px 18px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

/* Toast */
.toast {
  position: fixed;
  right: 20px;
  bottom: 72px;
  z-index: 500;
  background: #0f172a;
  color: #fff;
  padding: 10px 16px;
  border-radius: 8px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
  font-weight: 600;
  display: none;
}

.toast.show {
  display: block;
}

.chart-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(480px, 1fr));
  gap: 14px;
}

@media (max-width: 600px) {
  .chart-grid {
    grid-template-columns: 1fr;
  }
}

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

.clickable-row {
  cursor: pointer;
}