:root {
  --bg: #16181d;
  --bg-panel: #1d2026;
  --bg-toolbar: #22262e;
  --border: #2e333d;
  --text: #d7dae0;
  --text-dim: #8a90a0;
  --accent: #4f8ef7;
  --accent-2: #2563eb;
  --error: #f87171;
  --ok: #4ade80;
  --table-bg: #232730;
  --table-row-alt: #262b35;
  --row-hover: #2a3040;
  --null-color: #5b6372;
  font-size: 14px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  overflow: hidden;
}

/* ---------- Toolbar ---------- */
#toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 46px;
  padding: 0 12px;
  background: var(--bg-toolbar);
  border-bottom: 1px solid var(--border);
}

.brand {
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.3px;
  color: var(--accent);
  user-select: none;
}
.brand span { color: var(--text); font-weight: 400; }

.toolbar-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.spacer { flex: 1; }

#import-label {
  background: #2b303a;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 5px 12px;
  font-size: 12.5px;
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s;
  position: relative;
  white-space: nowrap;
}
#import-label:hover { background: #353b47; border-color: #3a4150; }
#import-label input { position: absolute; inset: 0; opacity: 0; cursor: pointer; width: 100%; }

#toolbar button {
  background: #2b303a;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 5px 11px;
  font-size: 12.5px;
  cursor: pointer;
  transition: background 0.12s;
}
#toolbar button:hover:not(:disabled) { background: #353b47; }
#toolbar button:disabled { opacity: 0.4; cursor: default; }

#file-picker { display: flex; align-items: center; }
#file-picker.hidden { display: none; }

#file-select {
  background: #14161b;
  color: var(--text);
  border: 1px solid var(--border);
  border-right: none;
  border-radius: 5px 0 0 5px;
  padding: 5px 8px;
  font-size: 12.5px;
  max-width: 220px;
  outline: none;
  cursor: pointer;
}
#file-select:focus { border-color: var(--accent); }

#file-picker button {
  background: #14161b;
  color: var(--text-dim);
  border: 1px solid var(--border);
  border-radius: 0 5px 5px 0;
  padding: 5px 9px;
  font-size: 14px;
  line-height: 1;
  cursor: pointer;
  transition: color 0.12s, background 0.12s;
}
#file-picker button:hover { color: var(--error); background: #1c1f26; }

a.nav-link {
  color: var(--text-dim);
  font-size: 12.5px;
  text-decoration: none;
  white-space: nowrap;
}
a.nav-link:hover { color: var(--accent); }

/* ---------- Main layout ---------- */
#app {
  display: flex;
  height: calc(100% - 46px);
}

/* ---------- Sidebar ---------- */
#sidebar {
  width: 240px;
  min-width: 180px;
  background: var(--bg-panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.sidebar-search {
  padding: 8px;
  border-bottom: 1px solid var(--border);
}
.sidebar-search input {
  width: 100%;
  background: #14161b;
  border: 1px solid var(--border);
  border-radius: 5px;
  color: var(--text);
  padding: 6px 9px;
  font-size: 12.5px;
  outline: none;
}
.sidebar-search input:focus { border-color: var(--accent); }

.sidebar-title {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 9px 12px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: var(--text-dim);
  border-bottom: 1px solid var(--border);
}
.sidebar-title span { color: var(--text-dim); font-weight: 400; }

#table-nav {
  list-style: none;
  overflow-y: auto;
  flex: 1;
}

#table-nav li {
  padding: 7px 12px;
  font-size: 13px;
  cursor: pointer;
  border-bottom: 1px solid var(--border);
  transition: background 0.1s;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
#table-nav li:hover { background: var(--table-row-alt); }
#table-nav li.active {
  background: #1c2330;
  box-shadow: inset 2px 0 0 var(--accent);
  color: var(--text);
}

#table-nav li span:first-child {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
#table-nav li .row-badge {
  font-size: 11px;
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
  flex-shrink: 0;
}

/* ---------- Content area ---------- */
#content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* ---------- Empty state ---------- */
#empty-state {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  color: var(--text-dim);
}
#empty-state.hidden { display: none; }
.empty-title { font-size: 15px; color: var(--text); font-weight: 500; }
.empty-sub { font-size: 13px; color: var(--text-dim); }
#empty-import {
  margin-top: 12px;
  background: #2b303a;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 7px 16px;
  font-size: 13px;
  cursor: pointer;
  transition: background 0.12s;
}
#empty-import:hover { background: #353b47; }

/* ---------- SQL query console ---------- */
#query-console {
  padding: 10px 16px 8px;
  background: #191c22;
  border-bottom: 1px solid var(--border);
}

.query-editor-row {
  display: flex;
  align-items: stretch;
  gap: 8px;
}

#sql-query {
  flex: 1;
  min-width: 0;
  min-height: 62px;
  max-height: 180px;
  resize: vertical;
  background: #111318;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 8px 10px;
  outline: none;
  font: 12px/1.45 "SF Mono", Menlo, Monaco, "Courier New", monospace;
  tab-size: 2;
}
#sql-query:focus { border-color: var(--accent); }
#sql-query::placeholder { color: #646b79; }

.query-actions {
  display: flex;
  flex-direction: column;
  gap: 6px;
  width: 82px;
}

.query-actions button {
  flex: 1;
  background: #2b303a;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 5px 10px;
  font-size: 12px;
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s;
}
.query-actions button:hover:not(:disabled) { background: #353b47; }
.query-actions button:disabled { opacity: 0.4; cursor: default; }
#btn-run-query { background: var(--accent-2); border-color: #3474e8; }
#btn-run-query:hover:not(:disabled) { background: #2f72ea; }

.query-console-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 18px;
  padding-top: 5px;
  font-size: 11px;
}

.query-hint { color: var(--text-dim); }
#query-status {
  color: var(--text-dim);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  text-align: right;
}
#query-status.success { color: var(--ok); }
#query-status.error { color: var(--error); }

/* ---------- Table view ---------- */
#table-view { flex: 1; display: flex; flex-direction: column; overflow: hidden; }
#table-view.hidden { display: none; }

#table-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px 8px;
}

#table-header h2 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  font-family: "SF Mono", Menlo, Monaco, "Courier New", monospace;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

#table-tools {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}

#table-meta {
  display: flex;
  gap: 12px;
  font-size: 12px;
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
}

#btn-export-csv {
  background: #2b303a;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 5px 11px;
  font-size: 12px;
  cursor: pointer;
  transition: background 0.12s;
}
#btn-export-csv:hover:not(:disabled) { background: #353b47; }
#btn-export-csv:disabled { opacity: 0.4; cursor: default; }

/* ---------- Filters & pagination ---------- */
#table-filters {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px 10px;
  gap: 12px;
}

#data-search {
  flex: 1;
  max-width: 360px;
  background: #14161b;
  border: 1px solid var(--border);
  border-radius: 5px;
  color: var(--text);
  padding: 6px 10px;
  font-size: 12.5px;
  outline: none;
}
#data-search:focus { border-color: var(--accent); }

#pagination {
  display: flex;
  align-items: center;
  gap: 6px;
}

#pagination button {
  background: #2b303a;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 4px 11px;
  font-size: 14px;
  line-height: 1;
  cursor: pointer;
}
#pagination button:hover:not(:disabled) { background: #353b47; }
#pagination button:disabled { opacity: 0.35; cursor: default; }

#page-info {
  font-size: 12px;
  color: var(--text-dim);
  min-width: 92px;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

#page-size {
  background: #2b303a;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 4px 6px;
  font-size: 12px;
  outline: none;
  cursor: pointer;
}

/* ---------- Data grid ---------- */
#grid-wrapper {
  flex: 1;
  overflow: auto;
  border-top: 1px solid var(--border);
}

#data-grid {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 12.5px;
  table-layout: auto;
}

#data-grid thead th {
  position: sticky;
  top: 0;
  z-index: 2;
}

#data-grid th {
  background: var(--bg-toolbar);
  color: var(--text);
  font-weight: 600;
  font-size: 12px;
  padding: 7px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  border-right: 1px solid var(--border);
  white-space: nowrap;
  cursor: pointer;
  user-select: none;
  vertical-align: top;
}

#data-grid th:hover { background: #272c35; }

#data-grid th .th-main {
  display: flex;
  align-items: center;
  gap: 6px;
}

#data-grid th .col-type {
  display: block;
  margin-top: 2px;
  font-size: 10.5px;
  font-weight: 400;
  color: var(--text-dim);
  text-transform: lowercase;
  letter-spacing: 0;
  font-family: "SF Mono", Menlo, Monaco, "Courier New", monospace;
}

#data-grid th .sort-arrow {
  font-size: 9px;
  color: var(--accent);
}

#data-grid th .fk-ref {
  font-size: 11px;
  font-weight: 400;
  color: var(--text-dim);
  cursor: pointer;
}
#data-grid th .fk-ref:hover { color: var(--accent); text-decoration: underline; }

#data-grid td {
  padding: 5px 12px;
  border-bottom: 1px solid var(--border);
  border-right: 1px solid var(--border);
  white-space: nowrap;
  max-width: 360px;
  overflow: hidden;
  text-overflow: ellipsis;
  font-family: "SF Mono", Menlo, Monaco, "Courier New", monospace;
  font-size: 12px;
  color: var(--text);
}

#data-grid tbody tr:nth-child(even) { background: var(--table-row-alt); }
#data-grid tbody tr:hover { background: var(--row-hover); }

#data-grid td.empty-grid {
  height: 76px;
  color: var(--text-dim);
  text-align: center;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-style: italic;
}

/* Frozen row-number gutter */
#data-grid th:first-child,
#data-grid td:first-child {
  position: sticky;
  left: 0;
  width: 52px;
  min-width: 52px;
  text-align: right;
  color: var(--text-dim);
  cursor: default;
}
#data-grid th:first-child { z-index: 3; }
#data-grid td.row-idx {
  z-index: 1;
  background: var(--bg-panel);
  font-weight: 500;
  user-select: none;
}

#data-grid td.null-val {
  color: var(--null-color);
  font-style: italic;
}

#data-grid td.num-val {
  color: #d9a441;
  text-align: right;
}

#data-grid td.date-val {
  color: #6bbf7b;
}

/* FK link cells */
.fk-link {
  color: var(--accent);
  text-decoration: none;
  cursor: pointer;
  transition: color 0.12s;
}
.fk-link:hover { text-decoration: underline; }

/* ---------- Footer ---------- */
#table-footer {
  padding: 6px 16px;
  font-size: 11.5px;
  color: var(--text-dim);
  border-top: 1px solid var(--border);
  font-variant-numeric: tabular-nums;
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: #3a4150; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #4a5260; }

@media (max-width: 720px) {
  #query-console { padding-left: 10px; padding-right: 10px; }
  .query-actions { width: 72px; }
  .query-console-footer { align-items: flex-start; flex-direction: column; gap: 2px; }
  #query-status { max-width: 100%; text-align: left; }
}