:root {
  color-scheme: light dark;
  --bg: #f4f5f7;
  --surface: #ffffff;
  --surface-2: #f8f9fb;
  --border: #e4e6ea;
  --text: #14161a;
  --muted: #6b7280;
  --accent: #4f46e5;
  --accent-hover: #4338ca;
  --accent-soft: #eef1ff;
  --accent-soft-border: #d6dafc;
  --danger: #b91c1c;
  --danger-bg: #fef2f2;
  --danger-border: #fecaca;
  --radius: 10px;
  --radius-sm: 7px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow: 0 1px 3px rgba(15, 23, 42, 0.06), 0 4px 12px rgba(15, 23, 42, 0.04);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.shell {
  max-width: 1360px;
  margin: 0 auto;
  padding: 0 1.5rem 3rem;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 0 1.1rem;
  background: linear-gradient(var(--bg) 78%, transparent);
}

.topbar h1 {
  margin: 0;
  font-size: 1.3rem;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.subtitle {
  margin: 0.2rem 0 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.toolbar {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 0.9rem 1rem;
}

.toolbar-row {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  gap: 1rem;
}

.toolbar-row-toggles {
  padding-top: 0.6rem;
  border-top: 1px solid var(--border);
}

.field-group {
  display: flex;
  align-items: end;
  gap: 0.5rem;
}

.filter-builder {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 0.9rem 1rem;
  margin-top: 0.75rem;
  animation: panel-in 0.12s ease-out;
}

.filter-builder-title {
  margin: 0 0 0.5rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text);
}

.filter-builder-row {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.filter-builder-hint {
  margin: 0 0 0.6rem;
  font-size: 0.8rem;
  color: var(--muted);
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  font-size: 0.82rem;
}

.field label {
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 500;
}

select,
input[type="date"],
input[type="text"],
input[type="number"] {
  padding: 0.42rem 0.55rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  font-size: 0.85rem;
  transition: border-color 0.12s ease, box-shadow 0.12s ease;
}

select:hover,
input:hover {
  border-color: #c7cbd3;
}

select:focus,
input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

input[type="number"] {
  width: 6rem;
}

button {
  padding: 0.42rem 0.85rem;
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: #fff;
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.12s ease, border-color 0.12s ease, transform 0.05s ease;
}

button:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}

button:active {
  transform: translateY(1px);
}

button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

button.secondary {
  background: var(--surface);
  color: var(--accent);
}

button.secondary:hover {
  background: var(--accent-soft);
}

.toggle-btn {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
}

.toggle-btn:hover {
  background: var(--surface-2);
  border-color: #c7cbd3;
}

.toggle-btn.is-active {
  background: var(--accent-soft);
  border-color: var(--accent-soft-border);
  color: var(--accent-hover);
}

.icon-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 0.42rem 0.6rem;
  line-height: 1;
  font-size: 0.9rem;
}

.icon-btn:hover {
  background: var(--surface-2);
  color: var(--text);
  border-color: #c7cbd3;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background: var(--accent-soft);
  border: 1px solid var(--accent-soft-border);
  border-radius: 999px;
  padding: 0.25rem 0.4rem 0.25rem 0.7rem;
  font-size: 0.78rem;
  color: var(--accent-hover);
}

.chip button {
  border: none;
  background: transparent;
  color: var(--accent-hover);
  padding: 0.05rem 0.3rem;
  font-size: 0.85rem;
  line-height: 1;
  border-radius: 999px;
}

.chip button:hover {
  background: rgba(79, 70, 229, 0.15);
}

.columns-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 0.9rem 1rem;
  margin-top: 0.75rem;
  animation: panel-in 0.12s ease-out;
}

.columns-panel-title {
  margin: 0 0 0.6rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text);
}

.columns-checkboxes {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.1rem;
  max-height: 10rem;
  overflow-y: auto;
}

.columns-checkboxes label {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.8rem;
  color: var(--text);
}

.columns-checkboxes input[type="checkbox"] {
  accent-color: var(--accent);
}

.histogram-btn {
  border: none;
  background: transparent;
  color: inherit;
  padding: 0 0.3rem 0 0;
  font-size: 0.85rem;
  line-height: 1;
  vertical-align: middle;
  opacity: 0.7;
}

.histogram-btn:hover {
  opacity: 1;
}

.histogram-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 0.9rem 1rem;
  margin-top: 0.75rem;
  animation: panel-in 0.12s ease-out;
}

.histogram-panel-header {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  gap: 0.75rem;
}

.histogram-panel-title {
  margin: 0;
  font-size: 0.88rem;
  font-weight: 600;
  flex: 1 1 auto;
}

#histogram-bins {
  width: 5rem;
}

.histogram-chart {
  margin-top: 1rem;
  display: flex;
  align-items: flex-start;
  gap: 0.4rem;
  overflow-x: auto;
  padding-bottom: 0.25rem;
}

.histogram-bar {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 3.5rem;
  flex: 1 1 0;
}

.histogram-bar-count {
  font-size: 0.72rem;
  color: var(--muted);
  margin-bottom: 0.25rem;
  min-height: 1em;
}

.histogram-bar-track {
  width: 100%;
  height: 9rem;
  display: flex;
  align-items: flex-end;
  background: var(--surface-2);
  border-radius: 4px 4px 0 0;
}

.histogram-bar-fill {
  width: 100%;
  min-height: 2px;
  background: linear-gradient(180deg, #6366f1, var(--accent));
  border-radius: 3px 3px 0 0;
}

.histogram-bar-range {
  margin-top: 0.4rem;
  font-size: 0.66rem;
  color: var(--muted);
  white-space: nowrap;
  text-align: center;
}

.histogram-empty {
  color: var(--muted);
  font-size: 0.85rem;
}

.error-banner {
  margin-top: 0.75rem;
  padding: 0.6rem 0.85rem;
  border-radius: var(--radius-sm);
  background: var(--danger-bg);
  color: var(--danger);
  border: 1px solid var(--danger-border);
  font-size: 0.83rem;
}

.table-scroll {
  margin-top: 0.75rem;
  overflow-x: auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.8rem;
  white-space: nowrap;
}

thead th {
  position: sticky;
  top: 0;
  background: var(--surface-2);
  text-align: left;
  padding: 0.55rem 0.7rem;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  user-select: none;
  font-weight: 600;
  color: var(--muted);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

thead th:hover {
  color: var(--text);
}

thead th .sort-indicator {
  color: var(--accent);
  margin-left: 0.25rem;
}

tbody td {
  padding: 0.45rem 0.7rem;
  border-bottom: 1px solid var(--surface-2);
}

tbody tr:hover {
  background: var(--surface-2);
}

.loading-cell,
.empty-cell {
  text-align: center;
  color: var(--muted);
  padding: 2rem !important;
}

.pager {
  margin-top: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  font-size: 0.82rem;
}

.pager-btn {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
}

.pager-btn:hover:not(:disabled) {
  background: var(--surface-2);
  border-color: #c7cbd3;
}

.page-status {
  color: var(--muted);
  min-width: 12rem;
  text-align: center;
}

.table-scroll::-webkit-scrollbar,
.histogram-chart::-webkit-scrollbar,
.columns-checkboxes::-webkit-scrollbar {
  height: 8px;
  width: 8px;
}

.table-scroll::-webkit-scrollbar-thumb,
.histogram-chart::-webkit-scrollbar-thumb,
.columns-checkboxes::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 999px;
}

@keyframes panel-in {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --surface: #17191f;
    --surface-2: #1e2129;
    --border: #2a2e37;
    --text: #e7e9ec;
    --muted: #929aa6;
    --accent: #6366f1;
    --accent-hover: #818cf8;
    --accent-soft: #1e2251;
    --accent-soft-border: #33389c;
    --danger-bg: #2a1414;
    --danger-border: #4a1f1f;
  }

  button {
    color: #0f1115;
  }

  button.secondary,
  .toggle-btn,
  .icon-btn,
  .pager-btn {
    color: var(--text);
  }

  .toggle-btn.is-active {
    color: var(--accent-hover);
  }

  .chip {
    color: #c7cbfa;
  }

  .chip button {
    color: #c7cbfa;
  }
}

@media (max-width: 640px) {
  .shell {
    padding: 0 1rem 2rem;
  }

  .pager {
    flex-wrap: wrap;
  }
}